JP2009242103A - Transport switching device of powder and grain material - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a switching device capable of improving durability in the device, while reducing a leakage quantity of air in an air transport passage by biting-in of a powder and grain material. <P>SOLUTION: This transport switching device 1 of the powder and grain material is interposed between upstream side air transport passages 3A and 3B branching off into two systems corresponding to two kinds of powder and grain materials and a downstream side air transport passage 4 of one system, and includes a slide base 10 for opening two independent upstream side opening parts 13 and 14 respectively communicated with the upstream side air transport passages of the two systems, a plate-like switching valve 20 for opening a through-hole part 22 in a substantially central part, a base cover 30 positioned on the downstream side of the switching valve and opening a downstream side opening part 31 communicated with the downstream side air transport passage, and a switching valve driving means 40 for respectively positionally adjusting the through-hole part to the respective two independent upstream side opening parts by slidingly controlling the switching valve. Notch parts 15 and 16 extending toward the mutually approaching side are respectively formed in the approaching side end parts of the two independent upstream side opening parts. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a particulate matter material transport switching device interposed between two upstream air transport paths that branch into two systems corresponding to two types of powder material and one downstream air transport path. .

Conventionally, waste resin such as sprue and runner generated by synthetic resin molding is pulverized by a pulverizer, the pulverized material and virgin material are mixed, and various synthetic resin products are molded from the mixed material. Has been done.
As a result, cost reduction is achieved by reusing waste resin while maintaining a certain level of quality.
Alternatively, a plurality of types of materials are mixed and the mixed materials are supplied to a resin molding machine or the like.

By the way, when mixing different kinds of materials as described above, it is necessary to mix the pulverized material and the virgin material at a predetermined mixing ratio in order to maintain the quality of the molded product. Further, even when a plurality of types of materials are mixed, it is necessary to mix them so as to obtain a predetermined blending ratio. For this purpose, the pulverized material and the virgin material, or two types of granular material are respectively stored from the granular material storage tank to the collector connected to the suction pump (blower) via the air transport path. A method of mixing at a predetermined blending ratio is employed while transporting by suction air.
In such a system, the powder interposed between the two upstream air transport paths from the two granular material storage tanks each storing different materials and the downstream air transport path that is the transport destination A granular material transport switching device is used.

For example, Patent Document 1 below proposes a switching device that is interposed between two systems of air transportation paths corresponding to two types of granular material and one system of air transportation paths downstream thereof. .
The switching device is generally communicated with two upstream cylindrical portions (upstream bifurcated pipes) respectively connected to the two systems of air transport paths, and the two cylindrical portions. A slide base (lower case) that is opened close to two openings, a plate-like switching valve that slides in the slide base, and a downstream system of the switching valve that is connected downstream of the switching valve. And a base cover (upper case) having a downstream opening communicating with the air transport path.

The conventional switching device will be schematically described with reference to FIG. An example in which an air cylinder is applied as the switching valve drive means will be described.
FIG. 19 schematically shows the switching device 100, and an example of a slide base 110, a switching valve 120 that slides in the slide base 110, and a drive unit that slides the switching valve 120 by sliding control. An air cylinder 130 is shown.
In the slide base 110, two openings 111 and 112 are opened close to each other along the slide direction of the switching valve 120. Each of these openings 111 and 112 has a circular shape in plan view in accordance with the piping shape of the air transportation path, and these openings 111 and 112 are respectively connected to the upstream side of these pipes ( In consideration of the thickness of the two cylindrical body portions), it is opened at a certain interval.

The switching valve 120 is formed in a plate shape, and has two blocking portions 121 and 122 positioned on the air cylinder side (rear side) and the front side, respectively, and a transparent portion opened between the blocking portions 121 and 122. It has a hole 123 along the sliding direction. The through-hole portion 123 has a circular shape in plan view that is substantially the same size and shape as the openings 111 and 112 in order to smoothly transport the granular material that is pneumatically transported.
The air cylinder 130 is generally provided at a piston 131 provided in the cylinder casing, a piston rod 132 connected to the piston 131 and extending and contracting from the cylinder casing, and at the front and rear ends in the sliding direction of the cylinder casing. And air inflow / outflow conduits 134 and 135 for allowing air to flow in and out.
The piston rod 132 and the switching valve 120 are connected by a connecting portion 133 such as a connecting bolt.

In the switching device 100 configured as described above, when one of the openings 111 and 112 of the slide base 110 is closed by one of the closing parts 121 and 122 of the switching valve 120, for example, as shown in FIG. In addition, when the front opening 112 is closed by the front closing part 122 of the switching valve 120, the through hole 123 is aligned with the rear opening 111 in plan view, thereby the opening. The upstream air transport path connected to the section 111 is connected to the downstream air transport path.
According to the switching device 100 having such a configuration, the surface of the switching valve 120 on the slide base 110 side (by the switching valve 120 that is slid in a substantially orthogonal direction with respect to the granular material transported by suction air ( The back surface) and the surface (the top surface of the slide groove) that slide-supports the switching valve 120 of the slide base 110 do not bite the granular material, and therefore transport air due to the biting of the granular material. The amount of leakage can be reduced.
JP 2007-320686 A

However, the switching device 100 proposed in Patent Document 1 may cause the following problems.
As shown in FIG. 25 (a), in the case where the switching valve driving means is an air cylinder 130, when the shortened piston rod 132 is extended, it is directed toward the space on the back side of the piston 131 in the cylinder casing. Then, the compressed air is introduced from the air inlet / outlet pipe 134 on the rear end side. As a result, the piston 131 is moved forward by the compressed air, the piston rod 132 is extended, and the switching valve 120 is slid forward. At this time, as shown in FIG. 25 (b), in the cylinder casing, compressed air is introduced into the back space of the piston 131, and the air existing in the front space on the front surface side of the piston 131. Is compressed as the piston 131 moves. The air compressed in this front side space gradually flows out with the outflow amount adjusted by an orifice or the like provided in the air inflow / outflow conduit 135 connected to the front end side of the cylinder casing. Further, the piston 131 moves forward while receiving resistance from the air compressed in the front space.

  As the piston 131 moves forward as described above, the switching valve 120 moves forward. During this movement, as shown in FIG. 25 (c), as shown in FIG. 25 (c), the front end downstream opening edge (the front side in the drawing in the plan view) 111 a of the rear opening 111 of the slide base 110 and the through hole 123 of the switching valve 120. There is a possibility that the powder material p is bitten between the rear edge upstream side opening edge of the rear end portion (the depth direction on the paper in the plan view) 123a. Although such a bite is not shown in the drawing, as shown in FIG. 25 (d), the piston rod 132 is extended to the maximum and the switching valve 120 is located on the front side. Even when the rod 132 is shortened and the switching valve 120 slides backward, the front end upstream opening edge of the through-hole portion 123 (in the depth direction in the drawing) 123b and the front of the slide base 110 There is a possibility that the particulate material p is caught between the downstream opening edge of the side opening 112 and the downstream opening edge (front side in the plan view) 112a.

When the granular material p is bitten at the above location, the sliding movement of the switching valve 120 is stopped, and the rear opening 111 is completely blocked by the rear blocking portion 121 of the switching valve 120 by this granular material p. In other words, the gap sp1 is formed.
When such a gap sp1 is formed, the suction air for air transportation leaks from the rear side opening 111 biting the granular material p, and the side to be transported, that is, the front side opening 112. In this case, the flow rate of suction air for pneumatic transportation is reduced. As a result, the granular material p is not smoothly transported toward the downstream side, and the air transport path may be blocked by the granular material. In addition, the granular material is bitten between the opposite side, that is, the front end upstream opening edge 123b of the through hole 123 and the rear end downstream opening edge 112a of the front opening 112 of the slide base 110. Even in the case of the gap, the gap sp1 is formed as described above.

  As another problem, as shown in this conventional example, when the switching valve drive means is an air cylinder, the sliding movement of the switching valve 120 is caused by the biting of the granular material p as described above. In the stopped state, the movement of the piston 131 in the air cylinder 130 is also stopped. At this time, the space on the front surface side of the piston 131 becomes an atmosphere close to atmospheric pressure due to the outflow of air from the above-described orifice or the like. In such a state, when the powder material p bitten in the above portion is released, sheared or broken, and the biting state is released, the back side of the piston 131 is stopped even when the piston 131 is stopped. Compressed air is introduced into the space, and the front-side space has an atmosphere close to atmospheric pressure as described above, so that sufficient resistance is generated by the compression of air as described above. In other words, the piston 131 may move forward at high speed and collide with the inner wall of the front end of the cylinder casing (the description is omitted, but the same applies when moving to the opposite side).

Such a high-speed movement of the piston 131 is when the remaining stroke amount (movement amount) st1 (see FIGS. 25C and 25D) from the stop position of the piston 131 to the front end or rear end of the cylinder casing is relatively large. , The air existing in the front side space or the back side space of the piston 131 is compressed by the movement of the piston 131, and resistance due to the compressed air is generated, so that the high speed movement of the piston 131 as described above is reduced. The
Therefore, in order to prevent the piston 131 from moving at high speed, a large gap is formed between the front opening 112 and the rear opening 111, and an air cylinder with a large stroke amount is used. It is conceivable to increase the remaining stroke amount from the stop position of the piston 131 to the front end or rear end of the cylinder casing. However, with such a configuration, when the apparatus is enlarged and the powder material is bitten, the opening on the side to be transported is not aligned with the through hole of the switching valve in plan view. Alternatively, the area to be aligned in a plan view is reduced, and there is a possibility that pneumatic transportation is not smoothly performed. Therefore, it is necessary to open the front side opening 112 and the rear side opening 111 close to each other to some extent.
On the other hand, since the size (particle size) of the powder material to be bitten is usually a small one of about 5 mm or less, the remaining stroke amount st1 in the state of being bitten and stopped is small. As a result, in the front side space or the back side space of the piston 131 as described above, sufficient resistance due to the compression of air does not occur, and the piston 131 moves forward or backward at a high speed and the front end of the cylinder casing or There was a risk of collision with the inner wall of the rear end.

The impact load generated at the time of the collision mainly acts as a compressive and tensile load on the connecting portion 133 that connects the piston rod 132 of the air cylinder 130 and the switching valve 120. When the engagement is released, the piston 131 moves at a high speed, so that the impact load exceeds the allowable stress of the connecting portion 133, and the connecting portion 133 may be broken by the impact load.
Alternatively, when the above-described biting and releasing of the biting are repeated and an impact load is repeatedly applied to the connecting portion 133, the connecting portion 133 may cause fatigue failure.

  The present invention has been made in view of the above circumstances, and a first object of the present invention is to provide a particulate matter material transport switching device that can reduce the amount of air leakage in the air transportation path due to biting of the particulate material. The second object of the present invention is to provide a transport switching device for granular material that can improve the durability of the device.

  In order to achieve the above object, a particulate matter material transport switching device according to the first aspect of the present invention includes an upstream air transportation path branched into two systems corresponding to two types of particulate material, and one system. The particulate matter material transport switching device interposed between the downstream air transport passages of the two, wherein two independent upstream opening portions respectively connected to the upstream air transport passages of the two systems are opened. And a plate-like switching valve having a through hole formed in the substantially central portion, and a downstream opening that is located downstream of the switching valve and communicates with the downstream air transport path. A base cover and a switching valve driving means for slidingly controlling the switching valve to align the through hole with each of the two independent upstream openings, the two independent upstream openings. Each adjacent side end of each part on the side close to each other Characterized in that only the cut portion extending is formed.

In the first aspect of the invention, each of the upstream openings has a substantially circular shape in plan view, and the cut portion has a small radius of curvature smaller than the radius of the upstream openings in plan view. You may form in circular arc shape. In this configuration, the radius of curvature of the cut portion may be not less than twice the particle size of the granular material and not more than 2/3 of the radius of the upstream opening.
Or in the said 1st invention, you may form the said notch part in a taper shape by planar view.
Moreover, in the said 1st invention, it is good also considering the said notch part as the level | step difference shape which cut and formed the recess only in the said switching valve side.

  Moreover, in order to achieve the said objective, the transport switching apparatus of the granular material which concerns on 2nd invention of this invention, The upstream air transportation path branched into two systems corresponding to two types of granular material, It is a transportation switching device for granular material interposed between a downstream air transportation path of one system, and two independent upstream openings respectively communicating with the upstream air transportation paths of the two systems An established slide base, a plate-like switching valve having a through-hole formed in a substantially central portion, and a downstream opening that is located downstream of the switching valve and communicates with the downstream air transport path. An open base cover; and a switching valve driving means that slide-controls the switching valve to align the through hole portion with each of the two independent upstream openings, and the through hole of the switching valve Extending outward at both ends along the sliding direction Characterized in that that the cut portion is formed.

In the second aspect of the invention, the through hole portion has a substantially circular shape in plan view, and each of the cut portions has a small arc shape in which the radius of curvature is smaller than the radius of the through hole portion in plan view. It may be formed. In this configuration, the radius of curvature of the cut portion may be not less than twice the particle size of the granular material and not more than 2/3 of the radius of the through hole portion.
Or in the said 2nd invention, you may form the said notch part in a taper shape by planar view.
In the second aspect of the invention, the cut portion may have a stepped shape in which a recess is cut and formed only on the slide base side.

  Moreover, in order to achieve the said objective, the transport switching apparatus of the granular material which concerns on 3rd invention of this invention, The upstream air transportation path branched into two systems corresponding to two types of granular material, A transport switching device for granular material interposed between a downstream air transport path of one system, which is adopted in any one of the slide bases employed in the first invention and the second invention. Any one of the switching valves, a base cover that is located downstream of the switching valve and has a downstream opening communicating with the downstream air transport path, and slide-controlling the switching valve, And a switching valve driving means for aligning the through hole with each of the two independent upstream openings.

  In the powder material transport switching device according to the first to third inventions of the present invention, the switching valve drive means slide-controls the switching valve so that the two through holes are formed in the two holes. Any one may be used as long as it is aligned with each of the independent upstream openings, and a hydraulic cylinder, an electric cylinder, an electric screw shaft (ball screw or the like), or an air cylinder may be used.

  In the powder material transport switching device according to any one of the first to third inventions of the present invention, the slide base and the switching valve driving means may be a locking fastener having a manual operation portion. When the manual operation unit is operated to release the connection and fixation between the slide base and the switching valve driving means, the switching valve is removed from the slide base along the sliding direction. It is good also as a structure which can be removed.

In addition, the above-mentioned powder material refers to a powder / granular material, but is not limited to this, and a material that can be pneumatically transported, such as a fine flake, short fiber, and sliver material. including.
Moreover, although the said material mainly points out resin pellets, such as a synthetic resin material, a resin fiber piece, etc., it is not restricted to this, A metal material, a woody material, a chemical material, a food material, etc. may be sufficient.

In the powder material transport switching device according to the first to third inventions of the present invention, a plate-like switching valve having a through-hole portion at a substantially central portion is controlled by a switching valve driving means. Thus, the through hole is aligned with each of the two independent upstream openings of the slide base. Therefore, by switching the powder material that is pneumatically transported through the two upstream air transport paths that communicate with each of the upstream opening portions of the slide base, it is located downstream of the switching valve, It can be transported toward the downstream opening that communicates with the downstream air transport path. Therefore, switching transportation of two types of granular materials can be realized with a simple configuration, and by switching the switching valve, the two types of granular materials can be mixed appropriately, for example, arranged downstream. The mixing in the collector etc. which is done becomes unnecessary.
Also, by adjusting the switching time of the switching valve, two types of powder material can be transported and mixed at a predetermined blending ratio.

  In the first aspect of the present invention, the adjacent end portions of the two independent upstream openings are formed with cut portions that extend toward the sides that are close to each other. Between the opening edge on the sliding direction end side of the valve through-hole portion (each end side when the switching valve is slid and reciprocated by the driving means) and the proximity side end opening edge of the upstream opening portion, When there is a granular material that is being transported by air and the granular material is bitten as described above, the granular material is provided at the proximal end of the upstream opening. It is guided to the incision part, and is inserted between the incision part and the opening end edge on the sliding direction end side of the through hole part. Therefore, the gap formed by the above-mentioned granular material biting can be reduced, and the amount of suction air leaked for air transportation leaking from the upstream opening on the side biting the granular material Can be reduced.

In the first aspect of the present invention, each of the upstream openings has a substantially circular shape in plan view, and the cut portion has a radius of curvature smaller than the radius of the upstream openings in plan view. If it is formed in a small arc shape, the following effects are obtained.
That is, since the cut portion is formed in a small arc shape having a curvature radius smaller than the radius of the upstream opening in a plan view, the switching valve is slid so that the through hole portion of the switching valve is one side. There is a matching area where the sliding end of the through hole and the notch formed at the proximal end of the other upstream opening are aligned in a plan view when sliding toward the upstream opening of For example, it becomes smaller than a circular opening. Therefore, the biting rate of the granular material can be effectively reduced.
In addition, even when the granular material is bitten as described above, since the matching area is small as described above, the gap as described above formed by biting can be reduced. It is possible to more effectively reduce the amount of air leakage at the opening on the inlet side.
Furthermore, the radius of curvature of the cut portion can be set as appropriate according to the diameter of the granular material that is pneumatically transported and the upstream opening, but more than twice the particle diameter of the granular material, In addition, by setting it to 2/3 or less of the radius of the upstream opening, the biting rate can be reduced more effectively, and the amount of air leakage at the biting side opening can be reduced even when biting. .

Or in the said 1st invention, if the said notch part is formed in a taper shape by planar view, there exist the following effects.
That is, since the cut portion is formed in a tapered shape, when the switching valve is slid and the through hole portion of the switching valve slides toward the one upstream side opening portion, the sliding direction end portion of the through hole portion and The matching area in which the notch formed at the near end of the other upstream opening is aligned in plan view is smaller than, for example, a simple circular opening. Therefore, the biting rate of the granular material can be effectively reduced.
In addition, even when the granular material is bitten as described above, since the matching area is small as described above, the gap as described above formed by biting can be reduced. It is possible to more effectively reduce the amount of air leakage at the opening on the inlet side.

In the first aspect of the invention, if the cut portion has a stepped shape in which a recess is cut only on the switching valve side, the cut portion is formed so as to form a recess only on the switching valve side. Since the step is formed, the rigidity and airtightness between these upstream openings can be improved as compared with the case where the cut portion is formed over the entire thickness direction of the slide base.
In addition, in the upstream portion of each upstream opening, since the step portion is formed and the cut portion is not formed, the granular material that is pneumatically transported toward the upstream opening is placed in the location. Therefore, it becomes difficult to bite, and the biting rate of the granular material can be reduced more effectively.

  In the second aspect of the invention, since the cutout portions extending outward are formed at both end portions along the sliding direction of the through hole portion of the switching valve, the switching valve has a through-hole as described above. Between the opening edge on the end side in the sliding direction of the hole and the opening edge on the close side of the upstream opening, there is a powder material in air transportation, and the powder material is In the case of biting, the granular material is guided to the notch provided at the end of the through hole in the sliding direction, and the near end of the notch and the upstream opening. It is bitten between the opening edge. Therefore, the gap formed by the above-mentioned granular material biting can be reduced, and the amount of suction air leaked for air transportation leaking from the upstream opening on the side biting the granular material Can be reduced.

Further, in the second invention, the through hole portion of the switching valve has a substantially circular shape in plan view, and the cut portion has a small radius of curvature smaller than the radius of the through hole portion in plan view. If formed into an arc shape, the following effects are obtained.
That is, since the cut portion is formed in a small arc shape with a curvature radius smaller than the radius of the through hole portion in plan view, the switching valve is slid so that the through hole portion of the switching valve is on one side. When sliding toward the upstream opening, the matching area in which the proximal end of one upstream opening and the notch formed in the sliding end of the through hole align in plan view However, it is smaller than, for example, a circular through-hole portion. Therefore, the biting rate of the granular material can be effectively reduced.
In addition, even when the granular material is bitten as described above, since the matching area is small as described above, the gap as described above formed by biting can be reduced. It is possible to more effectively reduce the amount of air leakage at the opening on the inlet side.
Further, the radius of curvature of the cut portion can be appropriately set according to the diameter of the granular material to be pneumatically transported and the diameter of the through-hole portion, but is not less than twice the particle diameter of the granular material, and By setting it to 2/3 or less of the radius of the said through-hole part, while being able to reduce a biting rate more effectively, even when it bites, the amount of air leaks in the opening part by the side of biting can be reduced.

Or in the said 2nd invention, if the said notch part is formed in a taper shape by planar view, there exist the following effects.
That is, since the cut portion is formed in a tapered shape, when the switching valve is slid and the through-hole portion of the switching valve slides toward one upstream opening, the proximity of one upstream opening The matching area where the side end portion and the cut portion formed at the end portion in the sliding direction of the through hole portion are aligned in a plan view is smaller than, for example, a simply circular through hole portion. Therefore, the biting rate of the granular material can be effectively reduced.
In addition, even when the granular material is bitten as described above, since the matching area is small as described above, the gap as described above formed by biting can be reduced. It is possible to more effectively reduce the amount of air leakage at the opening on the inlet side.

  In the second aspect of the invention, if the cut portion has a step shape in which a recess is formed only on the slide base side, the cut portion is formed so as to form a recess only on the slide base side. In the downstream part, a step is formed. Therefore, as described above, there is a granular material during pneumatic transportation between the opening edge on the sliding direction end side of the through hole of the switching valve and the opening edge on the close side of the upstream opening. In the case where the granular material is bitten as described above, the flow of the granular material is blocked, and the leakage of the suction air is more effectively blocked by the step. Can be reduced.

  Furthermore, the third invention includes any one of the slide bases employed in the first invention and any one of the switching valves employed in the second invention. While producing the same effect as the second invention, it produces the effect of enhancing them synergistically.

In the powder material transport switching device according to the first to third inventions of the present invention, if the switching valve driving means is an air cylinder, the switching valve driving means can be made compact, and the entire apparatus. The device can be made compact and the device can be manufactured at low cost.
Further, in the first to third inventions described above, the incision portions are formed at the adjacent end portions of the upstream opening portion of the slide base and / or at both end portions along the sliding direction of the through hole portion of the switching valve. Therefore, when the powder material is bitten as described above, the powder material is guided to the cut portion as described above, and the place where the powder material is bitten is the above-described conventional switching. Compared with the device, the switching valve moves to the end side in the sliding direction. As a result, even if the biting material is detached, sheared or broken and the biting is released, the front or rear end of the cylinder is stopped from the stop position of the piston stopped by the biting. The remaining stroke amount (movement amount) of the piston can be reduced.
Accordingly, it is possible to reduce the impact load as described above that acts on the connecting portion between the piston rod and the switching valve, which is generated when the piston moves through the remaining stroke amount and collides with the inner wall of the cylinder casing. Therefore, the breakage and fatigue failure of the connecting portion can be effectively reduced, and the durability of the device can be improved.

In the first to third aspects of the invention, the slide base and the switching valve driving means are connected and fixed by a locking fastener having a manual operation portion, and the manual operation portion is operated. When the connection and fixation between the slide base and the switching valve driving means are released, the following effects can be obtained if the switching valve is extracted from the slide base along the sliding direction and can be removed.
That is, the connection between the slide base and the switching valve driving means can be easily released by manual operation, and the switching valve connected to the switching valve driving means can be easily extracted from the slide base along the sliding direction. Can be removed. Therefore, the granular material adhering to and accumulating on the switching valve can be easily removed and cleaned. Also, the slide base can be easily cleaned from an opening formed in the direction of extracting the switching valve.
Further, for example, if the powder material adheres and accumulates on the slide base or the switching valve, the slidability of the switching valve deteriorates, and the load on the driving means increases. Since it can be cleaned, it can be cleaned regularly and such problems can be prevented.
In addition, when the granular material is attached and deposited on the switching valve and the slide base as described above, for example, when a material change is made to change the granular material to be transported to another dissimilar material, There is a risk of contamination of the material to be transported and mixed with the material deposited and deposited on the switching valve and slide base, and contamination to the newly transported particulate material may occur. According to this, since it can be easily cleaned, it becomes possible to periodically clean, and such problems can be prevented.

In addition, since the slide base can be cleaned by removing the switching valve that is reciprocated by the switching valve driving means, for example, when cleaning without removing, there is a risk that fingers may be injured by the switching valve. This can be reliably prevented, and the transport switching device is excellent in terms of safety.
Further, since the locking fastener has a manual operation portion, the switching valve driving means can be manually operated even when assembled to the slide base, and workability at the time of assembly is also good.

The best mode for carrying out the present invention will be described below with reference to the drawings.
1 (a) and 1 (b) are schematic longitudinal sectional views showing a transport switching device for granular material according to the first embodiment, and FIG. 2 is an exploded schematic perspective view of a main part of the transport switching device. 3 (a) to 3 (c) all show a slide base of the transport switching device, (a) is a schematic plan view, and (b) is a schematic longitudinal section taken along line X1-X1 in (a). A top view and (c) are schematic longitudinal cross-sectional views by the Y1-Y1 line arrow in (a).
In addition, the front-back direction shown in each following embodiment demonstrates the front of the expansion | extension direction of the piston rod of an air cylinder as the front.
Moreover, the sliding direction termination | terminus side shown in each following embodiment has pointed out each termination | terminus side when a switching valve is slid by the switching valve drive means and reciprocates.

  As shown in FIGS. 1 (a) and 1 (b), the particulate matter material transport switching device 1 according to the present embodiment is roughly composed of a material A upstream air transport path 3A and a material B upstream air described later. An upstream cylindrical portion 50 connected to the transport path 3B, a slide base 10 connected to the downstream side of the upstream cylindrical portion 50, and a plate-like shape slidably accommodated in the slide base 10 A switching valve 20, a slide cover 30 covering the upper side of the slide base 10, a downstream cylinder body 60 connected to the downstream air transport path 4, which is connected downstream of the slide cover 30, and which will be described later. , And an air cylinder 40 that slide-controls the switching valve 20.

The upstream cylinder 50 is composed of two hollow cylinders in which a front connection cylinder 51 and a rear connection cylinder 52 are arranged in parallel, and the front connection cylinder 51 and the rear connection cylinder 52 are In either case, the cross section is substantially circular with the same diameter.
Further, a flange portion 55 that is fixed to the back surface (upstream side surface) of the slide base 10 is formed at the downstream end of the hollow cylindrical body.
The front-side connecting cylinder 51 and the rear-side connecting cylinder 52 are hermetically connected at their upstream ends to the A-material upstream air transport path 3A and the B-material upstream air transport path 3B, respectively. The cylindrical pipe lines 53 and 54 of the 51 and the rear connection cylinder 52 constitute a part of the A material upstream air transport path 3A and the B material upstream air transport path 3B, respectively.

As shown in FIGS. 2 and 3, the slide base 10 has a plate-like bottom portion 11 with which the back surface of the switching valve 20 abuts and slides, and a width direction of the bottom portion 11 (a direction perpendicular to the slide direction). Side walls 12 and 12 erected upward at both ends, and two upstream openings 13 and 14 opened independently at the bottom 11 (front opening 13 and rear opening 14) And.
The side wall portions 12 and 12 are provided along the sliding direction, and the side wall portions 12 and 12 and the bottom portion 11 constitute a slide groove that slidably accommodates the switching valve 20.
The height from the bottom part 11 of these side wall parts 12 and 12 is made into the height matched with the thickness of the plate-shaped valve body 21 of the switching valve 20 mentioned later, and in the state which accommodated the switching valve 20, side wall parts 12 and 12 are accommodated. And the upper surface of the plate-shaped valve body 21 are substantially flush with each other.
Further, the width between the side wall portions 12 and 12 is set such that the plate-like valve body 21 is slidably accommodated in accordance with the width of the plate-like valve body 21 of the switching valve 20 described later.

The front side opening 13 and the rear side opening 14 provided in the bottom 11 are both substantially circular with the same diameter in plan view, and the diameters thereof are the front side connecting cylinder 51 and the rear side connecting cylinder 52. The inner diameter is substantially the same.
In addition, the front side opening 13 and the rear side opening 14 are opened close to each other along the sliding direction with a certain distance therebetween. The distance between the front side opening 13 and the rear side opening 14 is such that the front side connecting cylinder 51 and the rear side connecting cylinder 52 are formed on the adjacent side formed in order to form an air transportation path that is hermetically separated. When the switching valve 20 which will be described later is switched, the opening is set on the side different from the biting side and the switching valve. The 20 through-hole portions 22 are spaced so that at least a part thereof is aligned in plan view.

Moreover, the front side notch 15 which extends toward the side which these front side opening part 13 and back side opening part 14 mutually adjoin is each in the near side edge part of the front side opening part 13 and the back side opening part 14. And the rear side cutting part 16 is formed. That is, the incisions 15 and 16 are formed by cutting the proximate side ends of the front side opening 13 and the rear side opening 14 that are adjacently opposed to each other.
In the present embodiment, each of the cut portions 15 and 16 is formed in a small arc shape having a radius of curvature smaller than the radius of the upstream opening portions 13 and 14 in plan view.
The curvature radii of the notches 15 and 16 can be appropriately set according to the particle diameter of the granular material to be pneumatically transported and the diameters of the upstream openings 13 and 14, but in this embodiment, It is set to not less than twice the particle size of the granule material and not more than 2/3 of the radius of the upstream openings 13 and 14.
In the present embodiment, when the average particle diameter of the granular material p (see FIG. 6) is 3 mm, the diameters of the upstream openings 13 and 14 are 42 mm, respectively, and the curvatures of the notches 15 and 16 are set. The radii are each 12.5 mm, but the present invention is not limited to this and may be within the above range.

Further, the maximum width of each of the cut portions 15 and 16 having a small arc shape, that is, the width from the close side end edge of each upstream opening 13 and 14 to the close end edge of each cut portion 15 and 16 Can be set as appropriate according to the particle size of the granular material to be pneumatically transported, but is preferably about 1/4 to 5 times the particle size of the granular material. As a result, as will be described later, the amount of leakage can be effectively reduced even when the granular material is bitten. More preferably, the maximum width may be about 1/2 to 2 times the particle size of the granular material. As a result, the amount of leakage can be reduced more effectively, and the size of the apparatus is not increased. In the present embodiment, as described above, when the average particle diameter of the granular material p is 3 mm, the maximum width of each of the cut portions 15 and 16 is 3 mm.
The circular centers of the upstream openings 13 and 14 and the cut portions 15 and 16 are positioned on the same straight line along the sliding direction, and the circular centers of the cut portions 15 and 16 are located on the upstream opening 13. , 14 are positioned closer to the closer sides than the respective circle centers. In addition, the cut portions 15 and 16 are formed so that a partition wall is formed between the outer diameter portions of the cut portions 15 and 16 that have a small arc shape in plan view. Such a partition may have such a width as to have at least airtightness between the notches 15 and 16.

Further, in this embodiment, the notches 15 and 16 are not formed over the entire thickness direction of the slide base 10, and only the downstream side (upper side) of the bottom 11 of the slide base 10 is notched. Thus, a recess is formed only on the switching valve 20 side. Thus, the notch parts 15 and 16 are made into a concave structure, and the level | step-difference parts 15a and 16a are formed in the upstream site | part.
That is, from the back surface side of the slide base 10, it is set as the structure which cannot see both the notch parts 15 and 16, and it is set as the structure which can visually recognize only the substantially circular upstream opening parts 13 and 14. FIG.
Furthermore, the step upper surfaces of the step portions 15a and 16a are inclined surfaces that are inclined toward the upstream side (downward).

  As shown in FIG. 1, the upstream openings 13 and 14 are arranged on the front side of the upstream cylinder part 50 in the state where the upstream cylinder part 50 is fixed to the back surface of the slide base 10 as described above. The connecting pipe 51 and the rear side connecting cylinder 52 communicate with the cylindrical pipe lines 53 and 54, respectively. Like the pipe lines 53 and 54 of the front side connecting cylinder 51 and the rear side connecting cylinder 52, the A material upstream side air A part of the transport path 3A and the B material upstream air transport path 3B is configured.

As shown in FIG. 2, the switching valve 20 includes a plate-like valve body 21 made of a substantially rectangular plate-like body in a plan view in which a through-hole portion 22 is formed in a substantially central portion, and the plate-like valve body 21. And a connecting portion provided at the rear end portion.
The through-hole portion 22 has a substantially circular shape in plan view, and is substantially the same diameter as the upstream openings 13 and 14 of the slide base 10 that are substantially circular.
The plate-like portions on the front side and the rear side along the sliding direction with the through-hole portion 22 interposed therebetween constitute blocking portions 23 and 24 that block the upstream opening portions 13 and 14 of the slide base 10, respectively.
When the plate-like valve body 21 is slid by the air cylinder 40, as shown in FIG. 1 (a), when the rear-side closing portion 24 closes the rear-side opening 14 of the slide base 10, a through-hole portion is formed. 22 is aligned with the front opening 13 so that the front connecting cylinder 51 communicates with a downstream cylindrical body 60 described later. Further, as shown in FIG. 1B, when the front blocking portion 23 blocks the front opening 13 of the slide base 10, the through hole portion 22 is aligned with the rear opening 14 to connect the rear side. The cylinder 52 communicates with a downstream cylinder section 60 described later.

The connecting portion of the switching valve 20 includes a connecting bolt 25 screwed and connected to the tip of the piston rod 43 of the air cylinder 40, and a connecting member through which the shaft portion of the connecting bolt 25 is inserted to hold the bolt head. 27 and a pair of bolts 26, 26 for fixing the connecting member 27 to the rear end face of the plate-like valve body 21.
In addition, the structure of the connection part which connects the switching valve 20 and the piston rod 43 of the air cylinder 40 is not restricted to the above, It can design suitably according to the connection structure of a piston rod.
The switching operation of the switching valve 20 and the operation of the air cylinder 40 during the switching operation of the switching valve 20 will be described later.

The slide cover 30 is formed of a thin plate having a substantially rectangular shape in plan view, and a long hole-shaped downstream opening 31 is formed at a substantially central portion thereof.
The slide cover 30 is fixed to both side walls 12 and 12 of the slide base 10 with bolts or the like, and forms a rectangular cylindrical body having both ends in the sliding direction opened by the slide base 10. The valve body casing to accommodate is comprised.
When the slide cover 30 is fixed to the slide base 10, the downstream opening 31 has a substantially semicircular front semicircle of the front opening 13 and a rear side of the rear opening 14. It is opened in a long hole shape between the semicircle and has a shape communicating with both of the upstream side openings 13 and 14.
In FIG. 1, reference numeral 32 is a lid that covers the space between the slide cover 30 and the cylinder casing 41 of the air cylinder 40, and is fixed to the slide base 10 in the same manner as the slide cover 30. The lid 32 is fixed so as to be openable and closable. By opening the lid 32, the state of the connecting portion that connects the switching valve 20 and the piston rod 43 of the air cylinder 40 can be visually confirmed. It is said that.

The downstream cylindrical portion 60 is connected to the downstream side of the slide cover 30, and has a flange portion 61 fixed to the upper surface of the slide cover 30, and gradually from the flange portion 61 toward the downstream side. A tapered funnel-shaped tube 62 that is tapered, and is connected to the further downstream side of the flat funnel-shaped tube 62, has a substantially circular cross section, and has an inner diameter of the front connection tube 51 and the rear connection. A downstream connection cylinder 63 having a diameter substantially the same as the inner diameter of the cylinder 52 is provided.
The upstream end opening of the flat funnel-shaped cylinder 62 is substantially the same size and shape as the downstream opening 31 of the slide cover 30.
In addition, the downstream end of the downstream connection cylinder 63 is hermetically connected to the downstream air transport path 4, and the downstream connection cylinder 63 and the cylindrical pipe line 64 of the flat funnel-shaped cylinder 62 and the above-described slide cover. A downstream opening 31 established at 30 constitutes a part of the downstream air transport path 4.

In the present embodiment, the slide base 10 and the upstream cylinder part 50 are separate members, and the slide cover 30 and the downstream cylinder part 60 are separate members. Each may be integrally molded.
That is, the slide base 10 and the upstream cylindrical portion 50 formed integrally are grasped as a slide base, or the slide cover 30 and the downstream cylindrical portion 60 are integrally formed as a slide cover. It is also possible to grasp.
Moreover, the above-mentioned upstream cylinder part 50, the slide base 10, the plate-like valve body 21 of the switching valve 20, the slide cover 30, the downstream cylinder part 60, and the like are formed of a hard metal material such as carbon steel. Yes.

The air cylinder 40 is connected to a cylinder casing 41 fixed to the rear end portion of the slide base 10, a piston 42 (see FIG. 5) that is moved back and forth in the cylinder casing 41, and a front surface of the piston 42. The piston rod 43 extends and contracts from the inside of the cylinder casing 41, and the air inflow / outflow pipes 44 and 45 are respectively connected to the front and rear end portions of the cylinder casing 41 (in FIG. 1, in FIG. Only the connecting portion of the outlet pipes 44 and 45 is shown.)
In the state where the switching valve 20 is connected as described above, the stroke amount of the piston rod 43 of the air cylinder 40 is as short as possible as shown in FIGS. 1 (b) and 5 (a). In addition, the through hole portion 22 of the switching valve 20 and the rear side opening portion 14 of the slide base 10 are aligned in plan view, and as shown in FIG. 1 (a) and FIG. Thus, the stroke amount is such that the through hole portion 22 of the switching valve 20 and the front side opening portion 13 of the slide base 10 are aligned in plan view.

As described above, in this embodiment, the switching valve driving means that slide-controls the switching valve 20 is the air cylinder 40. Therefore, the switching valve driving means can be made compact, and the entire apparatus can be made compact and low. Cost.
Any switching valve driving means may be used as long as the switching valve 20 is slid and the through hole 22 is aligned with each of the two independent upstream openings 13 and 14. Alternatively, a hydraulic cylinder, an electric cylinder, an electric screw shaft (such as a ball screw) may be used.

In the present embodiment, each of the upstream openings 13 and 14 provided in the slide base 10 and the through hole 22 provided in the switching valve 20 have a substantially circular shape in plan view. It may have a shape, a substantially square shape in plan view, or another polygonal shape.
Further, the cross-sectional shapes of the upstream side cylinder part 50 and the downstream side cylinder part 60 may be any shape as described above.

Next, the switching operation of the switching valve 20 in the particulate material transport switching device 1 configured as described above and the operation of the air cylinder 40 during the switching operation of the switching valve 20 will be described with reference to FIGS. explain.
4 (a) to 4 (d) are explanatory views for explaining the switching operation of the switching valve of the transport switching device, wherein (a) is a schematic plan view, and (b) is (a). (C) is a schematic plan view, (d) is a schematic vertical sectional view of (c), and FIGS. 5 (a) to (c) are all the switching valves of the transport switching device. FIGS. 6A to 6D are schematic plan views schematically illustrating the operation of the air cylinder during the switching operation, and FIGS. 6A to 6D are explanatory diagrams for explaining a state in which the granular material is bitten in the transport switching device. (A) is a schematic plan view, (b) is a schematic longitudinal sectional view of (a), (c) is a schematic plan view, (d) is a schematic longitudinal sectional view of (c), FIGS. 7A to 7D are schematic plan views schematically showing the operation of the air cylinder in a state where the granular material is bitten in the transport switching device.

First, the switching operation of the switching valve 20 will be described based on FIGS. 4 and 6.
As shown in FIGS. 4A and 4B, when the piston rod 43 is extended and the switching valve 20 is in the forward position, the through hole portion 22 of the switching valve 20 is located on the front side of the slide base 10. The through hole portion 22 and the front side opening portion 13 communicate with each other in alignment with the opening portion 13, and the rear side closing portion 24 of the switching valve 20 closes the rear side opening portion 14 of the slide base 10.
4C and 4D, when the piston rod 43 is shortened and the switching valve 20 is in the rear position, the through hole portion 22 of the switching valve 20 is formed on the slide base 10. The through hole portion 22 and the rear side opening portion 14 communicate with each other in alignment with the rear side opening portion 14, and the front side closing portion 23 of the switching valve 20 closes the front side opening portion 13 of the slide base 10.

As described above, in the state where the granular material is not bitten, the through hole portion 22 of the switching valve 20 and the upstream side opening portions 13 and 14 communicated with the through hole portion 22 are described above. Thus, since they are substantially circular in plan view, each having substantially the same diameter, they are in a perfectly aligned state in plan view. In addition, the front side opening portion 13 and the rear side opening portion 14 of the slide base 10 are completely closed by the front side blocking portion 23 and the rear side blocking portion 24 of the switching valve 20.
In this state, the notches 15 and 16 formed at the close end portions of the front opening 13 and the rear opening 14 of the slide base 10 are also the front blocking portions of the switching valve 20 as described above. 23 and the rear side blocking part 24 are closed.

On the other hand, when the piston rod 43 is extended and the switching valve 20 is slid toward the front position, as shown in FIGS. In the case where the granular material p is bitten between the end upstream opening edge 22b and the rear notch 16 provided at the front end of the rear opening 14 of the slide base 10, the above-mentioned transparent material p. The hole 22 and the front opening 13 are not perfectly aligned in plan view, and a gap sp2 is formed on the rear side by the above biting.
Similarly, when the switching rod 20 is slid toward the reverse position, that is, when the piston rod 43 is shortened, as shown in FIGS. The granular material material p is bitten between the front edge upstream opening edge 22a of the through hole portion 22 and the front cut portion 15 provided at the rear end portion of the front opening 13 of the slide base 10. In this case, the through hole portion 22 and the rear side opening portion 14 are not completely aligned in a plan view, and the gap sp2 is formed on the front side by the biting.

  Even when the granular material p is bitten as described above, according to the granular material transport switching device 1 according to the present embodiment, the adjacent side ends of the upstream openings 13 and 14 as described above. Since the cut portions 15 and 16 are formed in the respective portions, the granular material p to be bitten is guided to the cut portions 15 and 16 and is bitten in the cut portions 15 and 16, so that the gap sp2 is It can be made smaller than the switching device described in the conventional example. Therefore, it is possible to reduce the leakage amount of suction air for air transportation that leaks from the upstream openings 13 and 14 on the side where the granular material p is bitten.

In particular, in the present embodiment, each of the incisions 15 and 16 is formed in a small arc shape whose curvature radius is smaller than the radius of each upstream opening 13 and 14 in plan view. When the switching valve 20 is slid and the through hole portion 22 of the switching valve 20 slides toward the front side opening portion 13, the cut portion provided in the sliding direction end portion and the rear side opening portion 14 of the through hole portion 22. For example, the matching area that is aligned with 16 in a plan view is smaller than that of a simply circular opening. Therefore, the biting rate of the granular material p can be effectively reduced.
Further, since the curvature radii of the cut portions 15 and 16 are set to be not less than twice the particle size of the granular material material p and not more than 2/3 of the radius of the upstream side openings 13 and 14, it is possible to bite more effectively. The rate can be reduced, and the amount of air leakage at the biting side opening can be reduced even when biting occurs.
Further, as described above, each of the incisions 15 and 16 has a small circular arc shape in plan view. Therefore, when the granular material is bitten into the above-described portion, the through-hole portion of the switching valve 20 It becomes easy to guide the powder material toward the notches 15 and 16 along the small arc in the direction in which 22 slides. That is, the granular material is not caught in the middle of each of the notches 15 and 16, and the movement of the switching valve 20 is not stopped, and the granular material is cut along the small arc. It becomes easy to guide to the close side end portions of the portions 15 and 16.

Furthermore, in the present embodiment, the notches 15 and 16 have a structure in which a recess is formed only on the switching valve 20 side, and the step portions 15a and 16a are formed as described above. Compared with the case where the cut portion is formed over the entire thickness direction, the rigidity and airtightness between the upstream openings 13 and 14 can be enhanced.
Further, in the upstream side portions of the respective upstream side opening portions 13 and 14, the step portions 15 a and 16 a are formed and the cut portions are not formed, so that air transportation is performed toward the respective upstream side opening portions 13 and 14. Depending on the location, it becomes difficult to bite the granular material to be used, and the biting rate of the granular material can be more effectively reduced.
Furthermore, in this embodiment, since the step upper surfaces of the step portions 15a and 16a are inclined surfaces that are inclined toward the upstream side (downward), adhesion and deposition of powder and the like can be reduced. In addition, it is good also not as such an inclined surface but a horizontal surface.

In addition, as described above, if the maximum width of each of the cut portions 15 and 16 having a small arc shape is about 1/2 to 2 times the particle size of the granular material, the powder that is pneumatically transported When the granule material p is bitten, it is bitten so as to be accommodated in the cut portions 15 and 16 in plan view, and the upstream side opening on the biting side is the closing portions 23 and 24 of the switching valve 20. Therefore, the amount of air leakage at the opening on the biting side can be reduced more effectively.
In particular, in the present embodiment, since the maximum width is set in accordance with the average particle diameter of the granular material that is pneumatically transported, when the granular material p is bitten, the granular material p is not cut 15. , 16 so as to be completely accommodated in a plan view, the amount of air leakage at the opening on the biting side can be more effectively reduced.

Next, the operation of the air cylinder 40 during the switching operation of the switching valve 20 will be described based on FIGS. 5 and 7.
As shown in FIG. 5A, when the piston rod 43 in a shortened state is extended, the compressed air is supplied from the rear end side air inflow / outlet pipe 45 toward the back side space of the piston 42 in the cylinder casing 41. Is introduced. As a result, the piston 42 is moved forward by the compressed air, and the piston rod 43 is gradually extended.
At this time, as shown in FIG. 5 (b), in the cylinder casing 41, compressed air was introduced into the back side space of the piston 42, and the front side of the piston 42 existed in the front side space. Air is compressed as the piston 42 moves. The air compressed in the front side space gradually flows out after the outflow amount is adjusted by an orifice or the like provided in the front end side air inflow / outflow conduit 44 of the cylinder casing 41. Further, the piston 42 moves forward while receiving resistance from the air compressed in the front space.
By moving the piston 42 forward as described above, as shown in FIG. 5C, the piston rod 43 is extended to the maximum, and the switching valve 20 becomes the forward position.
Although a detailed description is omitted, when the piston 42 moves backward, that is, when the piston 42 moves rearward, from the front end side air inflow / outflow conduit 44 toward the front side space of the piston 42 in the cylinder casing 41. Compressed air is introduced and the piston 42 is moved rearward as described above.

On the other hand, when the piston rod 43 is extended and the switching valve 20 is slid toward the front position as shown in FIGS. The granular material p is bitten between the end upstream opening edge 22b (see FIG. 6B) and the rear notch 16 provided at the front end of the rear opening 14 of the slide base 10. In the case of being pushed in, the movement of the piston 42 in the cylinder casing 41 is stopped as shown in FIG.
When the piston 42 stops in this way, the space on the front surface side of the piston 42 becomes an atmosphere close to the atmospheric pressure due to the outflow of air from an orifice or the like provided in the front end side air inflow / outflow conduit 44 described above.

In the above state, when the particulate material p bitten in the above location is released, sheared or broken, and the bitten state is released, even when the piston 42 is stopped, to the back side space. Since the compressed air is introduced from the rear end side air inflow / outlet conduit 45 and the atmosphere in the front side space is close to the atmospheric pressure as described above, the above air is compressed. As a result, the piston 42 moves forward at a high speed and collides with the inner wall of the front end of the cylinder casing 41 to stop (FIG. 7D).
Although detailed explanation is omitted, the piston 42 moves backward at high speed and collides with the inner wall of the rear end of the cylinder casing 41 in the same manner when the piston 42 moves backward, i.e., backward. Stop.

As described above, when the piston 42 moves at a high speed and collides with the inner wall of the front end of the cylinder casing 41, as described in the conventional example, an impact load acts on the connection bolt 25. Since the cut portions 15 and 16 are formed, the portion of the granular material p to be bitten is guided to the cut portions 15 and 16 and the portion into which the granular material p is bitten is compared with the conventional switching device. The switching valve 20 moves to the end side in the sliding direction. As a result, even when the biting powder material p is detached, sheared or broken, and the biting is released, the cylinder casing 41 starts from the stop position of the piston 42 stopped by the biting. The remaining stroke amount st2 (see FIGS. 7 (c) and 7 (d)) of the piston 42 up to the front end or rear end inner wall can be made smaller than that in the conventional example.
Therefore, the impact load acting on the connecting bolt 25 that connects the piston rod 43 and the switching valve 20 generated by the piston 42 moving the remaining stroke amount st2 as described above and colliding with the inner wall of the cylinder casing 41 can be reduced. Therefore, the breakage and fatigue failure of the connecting portion can be effectively reduced, and the durability of the device can be improved.

Next, an example of a particulate material transport system to which the particulate material transport switching device 1 configured as described above is applied will be described with reference to FIG. FIG. 8 is a schematic system diagram schematically showing the transport system.
In this transport system, the granular material material tank (A material storage tank) 2A in which the granular material material A (A material) is stored and the granular material material in which the granular material material B (B material) is stored. A storage tank (B material storage tank) 2B, A material storage tank 2A, B material storage tank 2B, and two systems A material upstream air transport path (A material transport path) 3A connecting the transport switching device 1 And a B material upstream air transport path (B material transport path) 3B and a downstream air transport path 4 connected to the downstream side of the transport switching device 1.
Moreover, in this transport system, the downstream end of the downstream air transport path 4 is connected to the collector 5 to which the suction blower 6 is connected, and the granular material transported to the collector 5 is: It is configured to be sequentially supplied to the molding machine 8 via the temporary storage hopper 7.

In the transport system configured as described above, the suction blower 6 is operated so that the A material and the B material stored in the storage tanks 2A and 2B are directed toward the downstream air transport path 4 as follows. Transported.
That is, when pneumatically transporting the material A toward the downstream side, as shown in FIG. 1A, the piston rod 43 of the air cylinder 40 is extended, and the through hole portion 22 of the switching valve 20 is slid. While aligning with the front side opening 13 of the base 10, the rear side opening 14 of the slide base 10 is closed by the rear side closing part 24 of the switching valve 20.
In this state, the B material transport path 3B is blocked, and the A material transport path 3A and the downstream air transport path 4 communicate with each other so that the A material is pneumatically transported toward the downstream side.

On the other hand, when pneumatically transporting the material B toward the downstream side, as shown in FIG. 1B, the piston rod 43 of the air cylinder 40 is shortened, and the through hole 22 of the switching valve 20 is slid. While aligning with the rear side opening part 14 of the base 10, the front side opening part 13 of the slide base 10 is obstruct | occluded by the front side obstruction | occlusion part 23 of the switching valve 20. FIG.
In this state, the A material transport path 3A is blocked, and the B material transport path 3B and the downstream air transport path 4 are communicated with each other, so that the B material is pneumatically transported toward the downstream side.

By switching the switching valve 20 as described above at short time intervals, each material is intermittently pneumatically transported toward the downstream side, and the collector 5 is in a state where both materials are appropriately mixed. It becomes.
Further, by adjusting the switching time of the switching valve 20, two types of powder material can be transported and mixed at a predetermined blending ratio.
Furthermore, since the switching transport of the different materials is performed by the above-described transport switching device 1 of the granular material, even when the granular material is bitten as described above, the leakage is performed as described above. An amount can be reduced, and it becomes a transportation system which can prevent blockage of the granular material in each air transportation way 3A, 3B, and 4.

In the above transport system, a system that pneumatically transports two types of resin pellets as a granular material to a molding machine that is a transport destination is illustrated. However, the transport destination is not a molding machine but a mixed material is stored. It may be used as a storage tank or a dry hopper for drying the mixed material.
Moreover, in the above transport system, a system that pneumatically transports two types of resin pellets as a powder material toward a molding machine that is a transport destination is not limited to this, but other two types of materials, For example, a system that pneumatically transports a material such as a metal material, a wood material, a chemical material, or a food material toward a molding machine or a processing machine may be used.

Next, another example of the slide base applied to the granular material transport switching device 1 according to the present embodiment will be described with reference to FIG.
The difference between the slide base 10A in the present example (first modification) and the slide base 10 is mainly the configuration of the cut portion. The same configuration is given the same reference numeral, The description will be omitted or briefly described.
Moreover, in FIG. 9, the virtual near side edge part opening edge of each upstream side opening part is illustrated with the dashed-two dotted line.

In the slide base 10A in the present modification, the cut portions 15A and 16A provided at the close end portions of the upstream openings 13 and 14 are cut over the entire thickness direction of the bottom portion 11 of the slide base 10A. Is formed.
That is, the cut portions 15A and 16A have the same shape as the cut portions 15 and 16 of the slide base 10 of the first embodiment, but the step portions 15a and 16a are formed. This is different from the notches 15 and 16 of the slide base 10 of the first embodiment.
Even in the case of such cut portions 15A and 16A, the same effect as described above is obtained except for the effect provided by the step portions 15a and 16a.

Next, still another example of the slide base applied to the particulate material transport switching device 1 according to the present embodiment will be described with reference to FIG.
The difference between the slide base 10B in the present example (second modification) and the slide base 10 is mainly the configuration of the cut portion. The same configuration is denoted by the same reference numeral, The description will be omitted or briefly described.
Moreover, in FIG. 10, the virtual proximity | contact side edge part opening edge of each upstream opening part is illustrated with the dashed-two dotted line.

In the slide base 10B in this example, as in the first modified example, the notches 15B and 16B provided at the close end portions of the upstream openings 13 and 14 are the thicknesses of the bottom 11 of the slide base 10B. A cut is formed over the entire direction.
Further, in this example, the shapes of the cut portions 15B and 16B are different from those of the first embodiment and the first modified example, and the cut portions 15B and 16B are tapered in a plan view. The cut portions 15B and 16B are cut so that the tapered vertices face each other, and a partition is formed between the tapered vertices.

That is, in the first embodiment and the first modified example, the cut portion having a small arc shape in a plan view with a radius of curvature smaller than the radii of the upstream openings 13 and 14 each having a substantially circular shape. In this example, the arcs at the close end portions of the upstream openings 13 and 14 are cut out so as to taper toward the close side. In other words, each upstream opening is formed such that both sides of the taper-shaped cut portions 15B and 16B toward the tapered apex are in contact with the semicircles on the adjacent side of the upstream openings 13 and 14, respectively. It is formed so as to cut out the arcs of the close side ends of the portions 13 and 14.
The tapered vertices of the cut portions 15B and 16B and the circular centers of the upstream openings 13 and 14 are formed so as to be on the same straight line along the slide direction.

Further, the maximum width of the notches 15B and 16B, that is, the width from the adjacent edge of each upstream opening 13 and 14 to the tapered apex of each of the notches 15B and 16B is the air-transported granular material. Although it can be set as appropriate according to the particle size of the material, etc., it is preferably the same as in the first embodiment and the first modification. In the present embodiment, as described above, when the average particle diameter of the granular material p is 3 mm, the maximum width of each of the cut portions 15B and 16B is 3 mm.
Further, the angle θ1 formed by one side of each of the tapered cut portions 15B and 16B and a perpendicular line in the sliding direction in contact with the tapered vertex (hereinafter, may be abbreviated as a cut angle) θ1 is pneumatic transport. It is set so that it may become more than the sliding angle of the granular material to be done. Here, the sliding angle is defined by defining the horizontal line in the sliding direction in contact with the tapered apex as a horizontal plane and the horizontal plane side as being vertically downward.
In FIG. 10A, only the angle θ1 formed by one side of the rear-side cut portion 16B and the slide direction orthogonal line in contact with the tapered vertex is illustrated, but the other side of the rear-side cut portion 16B and The same applies to an angle θ1 formed by both sides of the front cut portion 15B and the slide direction orthogonal lines that are in contact with the tapered vertices.

As described above, in the present modified example, the cut portions 15B and 16B are tapered in plan view, and therefore, similar to the first modified example, except for the effect provided by the stepped portions 15a and 16a. Has the effect of.
Further, as described above, the cut angle θ1 of each cut portion 15B, 16B is set to be equal to or larger than the sliding angle of the granular material that is pneumatically transported. In the direction in which the through hole portion 22 of the switching valve 20 slides, the powder material is guided toward one of the cut portions 15B and 16B toward the tapered apex. It will be easy to do. That is, the granular material is not caught in the middle of each of the cut portions 15B and 16B, and the movement of the switching valve 20 is not stopped.
In the second modification, the cut portions 15B and 16B are formed by cutting the entire bottom direction of the bottom portion 11 of the slide base 10B. However, each cut of the slide base 10 according to the first embodiment is used. Similarly to the portions 15 and 16, the step portion may be provided as a step shape in which a recess is cut and formed only on the switching valve 20 side. In this case, as described above, the upper surface of the stepped portion may be an inclined surface.

Next, another embodiment according to the present invention will be described with reference to the drawings.
FIGS. 11 (a) and 11 (b) are schematic longitudinal sectional views showing a transport switching device for granular material according to the second embodiment, and FIGS. 12 (a) and 12 (b) are both transport switching. The switch valve of an apparatus is shown, (a) is a schematic bottom view, (b) is a schematic longitudinal cross-sectional view taken along the line Z1-Z1 in (a), and (c) and (d) are both transported. The slide base of the switching apparatus is shown, (c) is a schematic plan view, and (d) is a schematic vertical sectional view taken along line X4-X4 in (c).
The difference from the first embodiment is mainly the configuration of the slide base and the switching valve. The same components are denoted by the same reference numerals, and the description thereof is omitted or briefly described.
The granular material transport switching device 1A according to the present embodiment is similar to the granular material transport switching device 1 according to the first embodiment, and is described with reference to FIG. It is applicable to.

The granular material transport switching device 1A according to the present embodiment is mainly different from the first embodiment in that the slide base 10C is not provided with a cut portion and the switch valve 20A is provided with a cut portion. Is a point.
That is, as shown in FIGS. 12A and 12B, the switching valve 20 </ b> A is formed outwardly at both end portions along the sliding direction of the through-hole portion 22 provided in the substantially central portion of the plate-like valve body 21 </ b> A. Incisions 28 and 29 (the front-side incision 28 and the rear-side incision 29) extending toward the front and the rear are formed.

Each of the cut portions 28 and 29 has a small arc shape in plan (bottom) view, like the small arc shapes 15 and 16 described in the first embodiment, and the radius of curvature thereof is The radius of the substantially circular hole 22 is smaller.
The curvature radii of the cut portions 28 and 29 can be appropriately set according to the particle diameter of the granular material to be pneumatically transported and the diameter of the through-hole portion 22. Similar to the embodiment, the particle size is not less than twice the particle size of the granular material and not more than 2/3 of the radius of the through-hole portion 22.
In the present embodiment, when the average particle diameter of the granular material p (see FIG. 13) is 3 mm, the diameter of the through-hole portion 22 is 42 mm, and the curvature radii of the cut portions 28 and 29 are 12 respectively. However, the present invention is not limited to this and may be within the above range.

Further, the maximum width of each of the cut portions 28 and 29 having the small arc shape, that is, the width from the both end edges of the through-hole portion 22 to the outermost edge in the slide direction of each of the cut portions 28 and 29 is pneumatic transport. Although it can be set as appropriate according to the particle size or the like of the granular material to be performed, it is set to about 1/4 to 5 times the particle size of the granular material as in the first embodiment. It is preferable. More preferably, the maximum width may be about 1/2 to 2 times the particle size of the granular material. In the present embodiment, as described above, when the average particle diameter of the granular material p is 3 mm, the maximum width of each of the cut portions 28 and 29 is 3 mm.
The respective circular centers of the through hole portion 22 and the cut portions 28 and 29 are positioned on the same straight line along the sliding direction, and the circular centers of the cut portions 28 and 29 are the circular centers of the through hole portion 22. It is set as the position which becomes outside rather than each.

Further, in this embodiment, the notches 28 and 29 are not formed over the entire thickness of the plate-shaped valve body 21A of the switching valve 20A, and only the upstream side of the plate-shaped valve body 21A is cut. Thus, a recess is formed only on the slide base 10C side. Thus, by making the notches 28 and 29 into a recess structure, stepped portions 28a and 29a are formed at the downstream side portions thereof.
In other words, from the upper surface side of the switching valve 20A, both the cut portions 28 and 29 are not visible, and only the substantially circular through-hole portion 22 is visible.
Further, the step surfaces of the step portions 28a and 29a are inclined surfaces inclined toward the downstream side (upward), respectively.
The slide base 10C has the same configuration as the slide base of the first embodiment, except that a cut portion is not formed as shown in FIGS. 12 (c) and 12 (d).

Next, the switching operation of the switching valve 20A in the particulate material transport switching device 1A having the above-described configuration and the operation of the air cylinder 40 during the switching operation of the switching valve 20A will be described with reference to FIGS. explain.
FIGS. 13A to 13D are explanatory views for explaining a state in which the particulate material is bitten in the transport switching device, where FIG. 13A is a schematic plan view, and FIG. , (A) is a schematic longitudinal sectional view, (c) is a schematic plan view, (d) is a schematic longitudinal sectional view of (c), and FIGS. 14 (a) to (d) are powdered to the transport switching device. It is a schematic plan view which shows typically operation | movement of the air cylinder in the state in which the granular material is biting.
Note that the switching operation of the switching valve 20A during normal operation, that is, the state in which the particulate material is not bitten, and the operation of the air cylinder 40 during the switching operation of the switching valve 20A are the same as in the first embodiment. Therefore, the description is omitted.

First, the switching operation of the switching valve 20A will be described based on FIG.
As shown in FIGS. 13A and 13B, when the piston rod 43 is extended and the switching valve 20A is slid toward the front position, the rear end portion of the through hole portion 22 of the switching valve 20A. When the granular material p is bitten between the rear side cut portion 29 formed by cutting on the upstream side and the front end downstream opening edge 14a of the rear side opening portion 14 of the slide base 10C, The through hole 22 and the front opening 13 are not perfectly aligned in plan view, and a gap sp3 is formed on the rear side by the above biting.
Similarly, when the switching valve 20A is slid toward the rear side when the piston rod 43 is shortened, as shown in FIGS. 13 (c) and 13 (d), the switching valve 20A The granular material p is placed between the front side cut portion 28 formed on the upstream side of the front end portion of the through-hole portion 22 and the rear end downstream side opening edge 13a of the front side opening portion 13 of the slide base 10C. When biting, the through hole 22 and the rear opening 14 are not perfectly aligned in a plan view, and a gap sp3 is formed on the front side by the biting.

  Even when the granular material p is bitten as described above, according to the granular material transport switching device 1A according to the present embodiment, both ends in the sliding direction of the through hole portion 22 of the switching valve 20A as described above. Since the cut portions 28 and 29 are formed in the respective portions, the granular material p to be bitten is guided to the cut portions 28 and 29 and is bitten in the cut portions 28 and 29, so that the gap sp3 is formed. It can be made smaller than the switching device described in the conventional example. Therefore, it is possible to reduce the leakage amount of suction air for air transportation that leaks from the upstream openings 13 and 14 on the side where the granular material p is bitten.

In particular, in the present embodiment, each of the cut portions 28 and 29 is formed in a small arc shape whose curvature radius is smaller than the radius of the through-hole portion 22 in plan view. When the through hole portion 22 of the switching valve 20A slides and slides toward the front side opening portion 13, a rear side cut portion 29 provided at a sliding direction end portion (rear end portion) of the through hole portion 22, The matching area where the front end portion of the rear side opening portion 14 is aligned in plan view is smaller than, for example, a simple circular through-hole portion. Therefore, the biting rate of the granular material p can be effectively reduced.
Moreover, since the curvature radii of the cut portions 28 and 29 are set to be not less than twice the particle size of the granular material material p and not more than 2/3 of the radius of the through-hole portion 22, the biting rate can be reduced more effectively. In addition, it is possible to reduce the amount of air leakage at the biting side opening even when biting.
Further, as described above, each of the cut portions 28 and 29 has a small circular arc shape in plan view. Therefore, when the granular material is bitten into the above-described portion, the through-hole portion of the switching valve 20A. In the reverse direction in which 22 slides, the powder material is easily guided toward the notches 28 and 29 along the small arc. That is, the granular material is not caught in the middle of each of the cut portions 28 and 29, and the movement of the switching valve 20A is not stopped, and the granular material is cut along the small arc. The portions 28 and 29 can be easily guided to the outermost side in the sliding direction.

Furthermore, in the present embodiment, each of the cut portions 28 and 29 has a structure in which a recess is formed only on the slide base 10C side, and the step portions 28a and 29a are formed as described above. As described above, there is a particulate material during pneumatic transportation between the opening edge on the end side in the sliding direction of the through hole portion 22 of the switching valve 20A and the opening edge on the close side of the upstream side opening portions 13 and 14. Thus, when the powder material is bitten as described above, the powder material is bitten so as to block the flow of the powder material, and the suction air leakage is more effective by the step portions 28a and 29a. It can be reduced by blocking it.
Furthermore, in this embodiment, since the step surfaces of the step portions 28a and 29a are inclined surfaces that are inclined toward the downstream side (upward), the influence on the particulate material that is normally pneumatically transported is reduced. it can.

Further, as described above, if the maximum width of each of the cut portions 28 and 29 having a small arc shape is about 1/2 to 2 times the particle size of the granular material, the powder that is pneumatically transported When the granule material p is bitten, it is bitten so as to be accommodated in the cut portions 28 and 29 in plan view, and the upstream side opening on the biting side is the closing portions 23 and 24 of the switching valve 20A. Therefore, the amount of air leakage at the opening on the biting side can be reduced more effectively.
In particular, in the present embodiment, since the maximum width is set in accordance with the average particle diameter of the granular material that is pneumatically transported, when the granular material p is bitten, the granular material p is notched 28. 29, the air leak amount at the opening portion on the biting side can be more effectively reduced.

Next, the operation of the air cylinder 40 during the switching operation of the switching valve 20A will be described based on FIG.
As shown in FIGS. 14A and 14B, when the piston rod 43 is extended and the switching valve 20A is slid toward the front position, the rear end portion of the through hole portion 22 of the switching valve 20A. Between the rear-side cut portion 29 (see also FIG. 13 (b)) provided on the upstream side and the front end downstream-side opening edge 14a of the rear-side opening 14 of the slide base 10C, the granular material p is placed. When it is bitten, the movement of the piston 42 in the cylinder casing 41 is stopped as shown in FIG.
In this way, when the piston 42 is stopped, as described in the first embodiment, the granular material p that is bitten in the place is detached, sheared or broken, and the bitten state is obtained. When released, the piston 42 moves forward at a high speed and collides with the inner wall of the front end of the cylinder casing 41 to stop (FIG. 14 (d)).
Although detailed explanation is omitted, the piston 42 moves backward at high speed and collides with the inner wall of the rear end of the cylinder casing 41 in the same manner when the piston 42 moves backward, i.e., backward. Stop.

As described above, when the piston 42 moves at high speed and collides with the inner wall of the front end of the cylinder casing 41, the impact load acts on the connecting bolt 25 as described in the conventional example, but according to this embodiment, As described above, since the cut portions 28 and 29 are formed, the part where the granular material p is guided to the cut portions 28 and 29 and bites the granular material p is the same as the conventional switching device. In comparison, the switching valve 20A moves toward the end in the sliding direction. As a result, even when the biting material material p is released, sheared or broken and the biting is released, the cylinder casing 41 starts from the stop position of the piston 42 stopped by the biting. The remaining stroke amount st3 (see FIGS. 14 (c) and 14 (d)) of the piston 42 up to the inner wall of the front end or rear end can be reduced as compared with the conventional example.
Accordingly, it is possible to reduce the impact load acting on the connecting bolt 25 that connects the piston rod 43 and the switching valve 20A, which is generated by the piston 42 moving the remaining stroke amount st3 as described above and colliding with the inner wall of the cylinder casing 41. Therefore, the breakage and fatigue failure of the connecting portion can be effectively reduced, and the durability of the device can be improved.

Next, another example of the switching valve applied to the granular material transport switching device 1A according to the present embodiment will be described with reference to FIGS.
The difference between the switching valve 20B in the present example (first modification) and the switching valve 20A is mainly the configuration of the cut portion, and the same configuration is denoted by the same reference numeral, The description will be omitted or briefly described.
Moreover, in Fig.15 (a), the virtual both-ends opening edge of the through-hole part is shown with the dashed-two dotted line.

In the switching valve 20B in the present modification, the cut portions 28A and 29A provided at both end portions of the through-hole portion 22 of the plate-like valve body 21B are cut across the entire thickness direction of the plate-like valve body 21B. Has been.
That is, the cut-out portions 28A and 29A have the same shape as the cut-out portions 28 and 29 of the switching valve 20A of the second embodiment, but the step portions 28a and 29a are formed. This is different from the notches 28 and 29 of the switching valve 20A of the second embodiment.
Even in the case of such cut portions 28A and 29A, the same effects as described above are obtained except for the effects provided by the step portions 28a and 29a.

Next, still another example of the switching valve applied to the particulate matter material transport switching device 1A according to the present embodiment will be described with reference to FIGS.
The difference between the switching valve 20C in the present example (second modification) and the switching valve 20A is mainly the configuration of the cut portion. The description will be omitted or briefly described.
Moreover, in FIG.15 (c), the virtual both-ends opening edge of the through-hole part is shown with the dashed-two dotted line.

In the switching valve 20C in the present example, the notches 28B and 29B provided at both ends of the through hole 22 of the plate-like valve body 21C are in the thickness direction of the plate-like valve body 21C, as in the first modification. A cut is formed throughout.
Further, in this example, the shapes of the cut portions 28B and 29B are different from those of the second embodiment and the first modification. That is, the cut portions 28B and 29B have a tapered shape in plan view, similar to the cut portions 15B and 16B of the slide base 10B of the second modification described in the first embodiment. Each of the taper-shaped cut portions 28B and 29B is formed with a cut so that each taper apex is directed outward along the slide direction.
That is, in the second embodiment and the first modification, an example of a cut portion having a small arc shape in a plan view in which the radius of curvature is smaller than the radius of the substantially circular hole portion 22 is shown. However, in this example, the arcs at both end portions of the through-hole portion 22 are notched so as to taper outward.
Further, the tapered apex of each of the cut portions 28B and 29B and the circular center of the through hole portion 22 are formed so as to be on the same straight line along the slide direction.

Further, the maximum width of each of the cut portions 28B and 29B, that is, the width from the both end edges of the through hole portion 22 to the tapered apex of each of the cut portions 28B and 29B is the particle size of the granular material to be pneumatically transported, etc. However, it is preferable to set the same as in the second embodiment and the first modified example. In the present embodiment, as described above, when the average particle diameter of the granular material p is 3 mm, the maximum width of each of the cut portions 28B and 29B is 3 mm.
Further, the cutting angle θ2 is set to be equal to or larger than the sliding angle, similarly to the cutting portions 15B and 16B of the slide base 10B of the second modified example described in the first embodiment.
In FIG. 15C, only the angle θ2 formed by one side of the front cut portion 28B and the slide direction orthogonal line in contact with the tapered vertex is illustrated, but the other side of the front cut portion 28B and The same applies to the angle θ2 formed by both sides of the rear-side cut portion 29B and the slide direction orthogonal lines respectively in contact with the tapered vertices.

As described above, in the present modification, the notches 28B and 29B are tapered in plan view, and therefore, similar to the first modification, except for the effect provided by the step portions 28a and 29a, The same effect is produced.
In addition, as described above, the cut angle θ2 of each of the cut portions 28B and 29B is set to be equal to or larger than the sliding angle of the granular material that is pneumatically transported. In the reverse direction in which the through hole portion 22 of the switching valve 20C slides, the particulate material is directed along the one side of each of the cut portions 28B and 29B toward the tapered vertex. It will be easy to guide. That is, the granular material is not caught in the middle of each of the cut portions 28B and 29B, and the movement of the switching valve 20C is not stopped.
In the second modified example, the cut portions 28B and 29B are formed by cutting the entire length of the plate-like valve body 21C of the switching valve 20C. However, the switching valve 20A according to the second embodiment is used. Similarly to the cut portions 28 and 29, the step portion may be provided as a step shape in which a recess is cut and formed only on the slide base 10C side. In this case, similarly to the above, the step surface of the step portion may be an inclined surface.

Next, still another embodiment according to the present invention will be described with reference to the drawings.
16 (a) and 16 (b) are schematic longitudinal sectional views showing a transport switching device for granular material according to the third embodiment.
The difference from the first embodiment is the configuration of the switching valve, and the difference from the second embodiment is the configuration of the slide base. These first and second embodiments are different from the first embodiment. The same reference numerals are given to the same components as those described above, and the description thereof will be omitted or simplified.
The granular material transport switching device 1B according to the present embodiment is similar to the granular material transport switching device 1 according to the first embodiment, and is described with reference to FIG. Is applicable.

That is, as shown in FIG. 16, the granular material transport switching device 1B according to the present embodiment includes the slide base 10 included in the granular material transport switching device 1 described in the first embodiment, and It includes a switching valve 20A provided in the powder material transport switching device 1A described in the second embodiment.
That is, in the particulate material transport switching device 1B according to the present embodiment, the cut portions 15, 16, 28, and 29 are provided in both the slide base 10 and the switching valve 20A.

Next, the switching operation of the switching valve 20A in the particulate material transport switching device 1B configured as described above and the operation of the air cylinder 40 during the switching operation of the switching valve 20A will be described with reference to FIGS. explain.
17 (a) to 17 (d) are explanatory views for explaining a state in which the granular material is bitten in the transport switching device, (a) is a schematic plan view, and (b) is a schematic plan view. , (A) is a schematic longitudinal sectional view, (c) is a schematic plan view, (d) is a schematic longitudinal sectional view of (c), and FIGS. It is a schematic plan view which shows typically operation | movement of the air cylinder in the state in which the granular material is biting.
Note that the switching operation of the switching valve 20A during normal operation, that is, the state in which the particulate material is not bitten, and the operation of the air cylinder 40 during the switching operation of the switching valve 20A are the same as in the first embodiment. Therefore, the description is omitted.

First, the switching operation of the switching valve 20A will be described based on FIG.
As shown in FIGS. 17A and 17B, when the piston rod 43 is extended and the switching valve 20A is slid toward the front position, the rear end portion of the through hole portion 22 of the switching valve 20A. The granular material p is bitten between the rear-side cut portion 29 formed on the upstream side and the rear-side cut portion 16 formed on the downstream side of the front end portion of the rear-side opening 14 of the slide base 10. In such a case, the through hole 22 and the front opening 13 are not perfectly aligned in plan view, and a gap sp4 is formed on the rear side by the biting.
Similarly, when the switching rod 20A is slid toward the rear position when the piston rod 43 is shortened, as shown in FIGS. 17 (c) and 17 (d), the switching valve 20A Between the front side cut portion 28 formed on the upstream side of the front end portion of the through hole portion 22 and the front side cut portion 15 formed on the downstream side of the rear end portion of the front side opening portion 13 of the slide base 10, When the granular material p is bitten, the through hole 22 and the rear opening 14 are not perfectly aligned in plan view, and the gap sp4 is formed by the biting on the front side. The

Even when the particulate material p is bitten as described above, according to the particulate material transport switching device 1B according to the present embodiment, both ends in the sliding direction of the through hole portion 22 of the switching valve 20A as described above. The cut portions 28 and 29 are formed in the respective portions, and the cut portions 15 and 16 are formed in the adjacent end portions of the upstream side opening portions 13 and 14 of the slide base 10, respectively. p is guided to the cut portions 15, 16, 28, and 29 and is bitten by the cut portions 15, 16, 28, and 29. That is, as shown in FIGS. 17A and 17B, between the rear side cut portion 29 of the through hole portion 22 of the switching valve 20 </ b> A and the rear side cut portion 16 of the rear side opening portion 14 of the slide base 10. And is bitten between them. Alternatively, as shown in FIGS. 17 (c) and 17 (d), between the front cut portion 28 of the through hole 22 of the switching valve 20 </ b> A and the front cut portion 15 of the front opening 13 of the slide base 10. And is bitten between them.
Therefore, the gap sp4 formed by biting the granular material p can be remarkably reduced as compared with the switching device described in the conventional example, and is smaller than the first embodiment and the second embodiment. it can. Therefore, it is possible to reduce the leakage amount of suction air for air transportation that leaks from the upstream side openings 13 and 14 on the side where the granular material p is bitten.

In particular, in the present embodiment, each of the cut portions 15, 16, 28, and 29 has a radius of curvature smaller than the radii of the through hole portion 22 and the upstream side opening portions 13 and 14 in plan view. Since it is formed in a small arc shape, when the switching valve 20A is slid and the through hole portion 22 of the switching valve 20A slides toward the front side opening portion 13, the sliding direction end portion ( The matching area in which the rear side cut portion 29 provided at the rear end portion and the front side cut portion 16 provided at the front end portion of the rear side opening portion 14 are aligned in plan view is, for example, simply circular. It becomes smaller than the through-hole part and / or upstream opening part. Therefore, the biting rate of the granular material p can be effectively reduced.
Further, the radius of curvature of the cut portions 15, 16, 28, 29 is set to be not less than twice the particle size of the powder material material p and not more than 2/3 of the radius of the through hole portion 22. In addition to being able to reduce the entrapment rate, the amount of air leakage at the entrainment side opening can also be reduced when entrained.

Further, as described above, each of the notches 15, 16, 28, 29 is formed in a small arc shape in plan view, and therefore, when the granular material is bitten into the above-described portion, the switching valve 20A. It is easy to guide the granular material along the small arcs toward the notches 15, 16, 28, and 29 along the direction in which the through-hole portion 22 slides. That is, the granular material is not caught in the middle of each of the cut portions 15, 16, 28, 29, and the movement of the switching valve 20A is not stopped, and the granular material is made into these small arcs. Along this, it becomes easy to guide the adjacent side end portions of the cut portions 15 and 16 and the outermost slide direction of the cut portions 28 and 29.
Furthermore, in the present embodiment, the notches 15 and 16 of the slide base 10 and the notches 28 and 29 of the switching valve 20A are stepped, so that they will be described in the first embodiment and the second embodiment, respectively. The same effect as that obtained by the stepped portion is obtained.

Further, as described above, if the maximum width of each of the cut portions 15, 16, 28, 29 having a small arc shape is about 1/2 to 2 times the particle size of the granular material, air When the granular material p to be transported is bitten, it is bitten so as to be accommodated in the notches 15, 16, 28, 29 in plan view, and the upstream opening on the biting side is switched. Since the valve 20A is substantially closed by the closing portions 23 and 24, the amount of air leakage at the opening on the biting side can be more effectively reduced.
In particular, in the present embodiment, since the maximum width is set in accordance with the average particle size of the granular material that is pneumatically transported, when the granular material p is bitten, the granular material p is notched 16. Between the cut portion 29 and the cut portion 29 or between the cut portion 15 and the cut portion 28 so as to be completely accommodated in a plan view, more effectively reducing the amount of air leakage at the opening portion on the biting side. Can be reduced.

Next, the operation of the air cylinder 40 during the switching operation of the switching valve 20A will be described based on FIG.
As shown in FIGS. 18A and 18B, when the piston rod 43 is extended and the switching valve 20A is slid toward the front position, the rear end portion of the through hole portion 22 of the switching valve 20A. Granules between the rear-side cut portion 29 (see also FIG. 17B) provided on the upstream side and the rear-side cut portion 16 provided at the front end of the rear-side opening 14 of the slide base 10 When the body material p is bitten, the movement of the piston 42 in the cylinder casing 41 is stopped as shown in FIG.
In this way, when the piston 42 is stopped, as described in the first embodiment, the powder material p bitten in the portion is detached, sheared or broken, and the biting state is obtained. When released, the piston 42 moves forward at a high speed and collides with the inner wall of the front end of the cylinder casing 41 to stop (FIG. 18 (d)).
Although detailed explanation is omitted, the piston 42 moves backward at high speed and collides with the inner wall of the rear end of the cylinder casing 41 in the same manner when the piston 42 moves backward, i.e., backward. Stop.

As described above, when the piston 42 moves at high speed and collides with the inner wall of the front end of the cylinder casing 41, the impact load acts on the connecting bolt 25 as described in the conventional example, but according to this embodiment, As described above, since the cut portions 15, 16, 28, 29 are formed, the granular material p is guided to the cut portions 15, 16, 28, 29, and bites the granular material p. However, compared with the conventional switching device and the first and second embodiments, the switching valve 20A moves to the end side in the sliding direction. As a result, even when the biting powder material p is detached, sheared or broken, and the biting is released, the cylinder casing 41 starts from the stop position of the piston 42 stopped by the biting. The remaining stroke amount st4 (see FIGS. 18 (c) and (d)) of the piston 42 to the inner wall of the front end or the rear end can be significantly reduced as compared with the conventional example, and the first and second embodiments described above. Can be smaller than the form.
Therefore, it is possible to reduce the impact load acting on the connecting bolt 25 that connects the piston rod 43 and the switching valve 20A, which is generated by the piston 42 moving the remaining stroke amount st4 as described above and colliding with the inner wall of the cylinder casing 41. Therefore, the breakage and fatigue failure of the connecting portion can be effectively reduced, and the durability of the device can be improved.

In this embodiment, the slide base 10 described in the first embodiment and the switching valve 20A described in the second embodiment are combined and applied to the powder material transport switching device 1B. Although shown, either the slide base 10 described in the first embodiment, the slide base 10A according to the first modification, or the slide base 10B according to the second modification, and the switching valve 20A described in the second embodiment. A combination of the switching valve 20B according to the first modification or the switching valve 20C according to the second modification may be applied to the transport switching device 1B for the granular material.
Further, in each of the above embodiments, the cut portion is exemplified as a small arc shape in a plan view or a tapered shape in a plan view. When powder material is bitten into the part as a shape that extends toward the side close to each other and / or as a shape that extends outward at both ends of the through hole of the switching valve In this case, a shape that can reduce the amount of leakage of the suction air when aligned with the through hole portion or when aligned with the upstream opening portion may be used.
Furthermore, it is good also considering the taper top vicinity of the cut part made into the said taper shape as a small circular arc shape. For example, if the small arc shape near the tapered apex is a semicircular shape having a radius of curvature substantially the same as the average particle diameter of the air-carrying granular material, the amount of suction air leakage can be reduced more effectively. it can.

Next, still another embodiment according to the present invention will be described with reference to the drawings.
FIG. 19 shows an exploded schematic perspective view schematically showing the main part of the transport switching device for granular material according to the fourth embodiment, and FIG. 20 (a) schematically shows the transport switching device. Partially broken schematic plan view, (b) is a view similar to (a) for explaining the removal operation of the switching valve, FIG. 21 is a view similar to FIG. 20 (a) for explaining the removal operation, FIG. 22A is a partially broken schematic plan view schematically showing a state in which the switching valve is removed from the transport switching device, and FIG. 22B is a view taken in the direction of the arrow W1 in FIG.
Note that differences from the first embodiment will be mainly described, and the same components as those in the first embodiment will be denoted by the same reference numerals, and description thereof will be omitted or simplified.
In addition, the granular material transport switching device 1C according to the present embodiment is similar to the granular material transport switching device 1 according to the first embodiment, and is described based on FIG. It is applicable to.

  In the granular material transport switching device 1C according to the present embodiment, unlike the above-described embodiments, as shown in FIG. 19, a slide base 10D and an air cylinder 40A are combined with a handle portion that constitutes a manual operation portion. A pair of operation handles 80 and a pair of connection fixtures 70 constituting a locking elastic fastener having 81 are connected and fixed.

As shown in FIG. 19, the slide base 10D differs from the above embodiments in that the outer wall near the rear end of the side walls 12A, 12A extends along the height direction of the side walls 12A, 12A. A substantially V-shaped cutout groove 9 is formed. The rear end portion side of the notch groove 9 constitutes a locking inclined portion having an inclined surface 9a corresponding to the inclined surface 74 of the locking claw portion 72 of the coupling fixture 70 described later.
As shown in FIG. 20A, the notch groove 9 is formed so that the front end of the locking claw 72 of the connection fixture 70 is notched in the state where the inclined surface 74 of the connection fixture 70 is in contact or pressure contact. The depth is such that it does not reach the deepest part.
Further, on the side wall portions 12A and 12A of the slide base 10D, a female screw hole 17 is provided on the further rear end side of the notch groove 9 to be screwed with a male screw portion 83 of an operation handle 80 described later. .
In the example shown in the figure, the female screw hole 17 is provided so as to penetrate along the direction (thickness direction of the side wall) perpendicular to the sliding direction of the side walls 12A, 12A. You may do it. That is, the female screw hole 17 may be deep enough to connect and fix the connection fixture 70 by operating the operation handle 80 as will be described later.

Unlike the above-described embodiments, the air cylinder 40A has a connecting plate 46 fixed to the front end surface of the cylinder casing 41, and is fixed to the rear end portion of the slide base 10D via the connecting plate 46.
As shown in FIGS. 19 and 20, the connecting plate 46 is larger than the width of the cylinder casing 41 and substantially the same width as the slide base 10D. Both end portions 47 extending outward in the width direction (direction perpendicular to the sliding direction) are formed so as to be chamfered along the height direction, and are inclined toward the rear side and the center portion. Each surface 47a is formed, and both end portions 47 constitute a locking inclined portion. The inclined surface 47a constitutes an inclined surface provided corresponding to an inclined surface 74 of the connecting fixture 70 described later.

As shown in FIG. 19, each of the pair of connecting fixtures 70 is substantially U-shaped in a plan view, and faces facing each other across the recess 73 are widened toward the front side. It has the latching claw parts 72 and 72 made into the inclined surface 74 facing each other.
In the present embodiment, the connection fixture 70 includes a base 71 having an insertion hole 75 through which a male screw portion 83 of an operation handle 80 to be described later is inserted, and the locking claw portions 72 and 72 are formed of the base portion. It protrudes from both ends of 71.
Further, as shown in FIG. 20 (a), inclined surfaces 74, 74 are formed at the base end portions of the locking claws 72, 72, as will be described later, and the inclined surfaces 9a of the notch groove 9 of the slide base 10D. The outer surface of the side wall portion 12A of the slide base 10D, the end surface of the end portion 47 of the connecting plate 46, and the inner portion of the base portion 71 of the connecting fixture 70 in a state where the inclined surface 47a of the connecting plate 46 of the air cylinder 40A is in contact or pressure contact. The rising part which is not made into the inclined surface is formed so that a slight space | gap may be formed between side surfaces.
As will be described later, the connection fixture 70 is disposed across the connection portion between the rear end portion of the slide base 10D and the connection plate 46 fixed to the front end portion of the air cylinder 40A. The connection is fixed by 70 so as to sandwich them.

The operation handle 80 constitutes a manual operation unit, and is substantially L-shaped in plan view as shown in FIG. 19. The operation handle 80 protrudes from a rod-shaped handle unit 81 and one end of the handle unit 81. It consists of a screw part. The threaded portion includes a restricting portion 82 that serves as a restricting surface whose tip is in contact with the outer surface of the base 71 of the coupling fixture 70, and a male screw portion 83 that is connected to the tip of the restricting portion 82.
The configuration of the handle portion 81 constituting the manual operation portion is not limited to the substantially rod shape as shown in the figure, but instead of the handle portion 81, a thumbscrew shape or a knurled shape is used. Etc., and it can be operated manually.

When connecting and fixing the slide base 10D constituting the valve body casing and the air cylinder 40A constituting the switching valve driving means using the connection fixture 70 and the operation handle 80 having the above-described configuration, FIG. As shown in a), the male thread portion 83 of the operation handle 80 is inserted into the female thread hole 17 of the slide base 10D in a state where the male thread portion 83 of the operation handle 80 is inserted into the insertion hole 75 of the coupling fixture 70. 83 is screwed.
At this time, a pair of the inclined surfaces 74 and 74 of the connecting fixture 70 is opposed to the inclined surface 9a of the notch groove 9 of the slide base 10D and the inclined surface 47a of the connecting plate 46 of the air cylinder 40A. The operating handle 80 is rotated in a state where the connecting fixtures 70 are arranged, and the male screw portion 83 is screwed into the female screw hole 17 of the slide base 10D. Thereby, the connection fixture 70 is restricted by the restriction portion 82 of the operation handle 80 and moves toward the axial tip of the male screw portion 83 (the connection portion side between the slide base 10D and the connection plate 46). . By the movement of the connecting fixture 70, the inclined surfaces 74, 74 are pressed against the inclined surface 9a of the notch groove 9 of the slide base 10D and the inclined surface 47a of the connecting plate 46 of the air cylinder 40A.
Due to the pressure contact between the inclined surfaces 74 and 74 of the connecting fixture 70, the connecting and fixing of the rear end portion of the slide base 10D and the connecting plate 46 fixed to the front end portion of the air cylinder 40A is a taper action of these inclined surfaces. Is made stronger.

  On the other hand, when the air cylinder 40A connected and fixed to the slide base 10D as described above is removed from the slide base 10D, the operation handle 80 is rotated as shown in FIG. The screwing of the male screw portion 83 of the handle 80 and the female screw hole 17 of the slide base 10D is loosened. Thereby, the restricting portion 82 of the operation handle 80 is retracted, and the connecting fixture 70 inserted through the male screw portion 83 can be retracted. In this state, the locking claw 72 of the coupling fixture 70 is locked with the notch groove 9 of the slide base 10D and both ends 47 of the coupling plate 46 of the air cylinder 40A. Release by separating them. When these locks are released, as shown in FIG. 21, the switching valve 20 can be extracted along the slide direction from the rear end opening of the slide groove of the slide base 10D.

  As described above, when the switching valve 20 is extracted and removed, as shown in FIG. 22A, the switching valve 20 is connected to the air cylinder 40A, but its surface is exposed. Easy cleaning. Further, as shown in FIG. 22 (b), the slide base 10D and the slide cover 30 constituting the valve body casing are open at the front and rear ends of the slide groove. Easy and reliable cleaning. In addition, since the valve body casings 10D and 30 can be cleaned by removing the switching valve 20 that is reciprocated by the air cylinder 40A, for example, when cleaning without removing, there is a possibility that fingers or the like may be injured by the switching valve. Such a thing can be reliably prevented, and the transport switching device 1C is excellent in terms of safety.

  As described above, after the switching valve 20 is extracted from the slide base 10D and removed, the assembly may be performed in the reverse procedure to the above. That is, the switching valve 20 is inserted into the slide groove, which is the space for accommodating the switching valve 20 surrounded by the slide base 10D and the slide cover 30, from the opening at the rear end thereof, and the front surface of the connecting plate 46 is positioned behind the slide base 10D. It abuts on the end. Next, the operation handle 80 is rotated, and each of the locking claws 72 of the connection fixture 70 is locked to the notch groove 9 and both ends 47 of the connection plate 46 as described above, and the operation handle 80 is further rotated. It is easily connected and fixed by moving and tightening.

In this embodiment, as a mode in which the connection fixture 70 is pressed toward the connection portion between the slide base 10D and the connection plate 46, the male screw portion 83 formed on the operation handle 80 and the side wall portion 12A of the slide base 10D are provided. Although the aspect made | formed by screwing with the formed female screw hole 17 is illustrated, it is not restricted to such an aspect. For example, both operating handles 80 are cam levers, and the coupling fixture 70 is inserted through the shaft of the cam lever, and the tip of the shaft is fixed to a hole or the like provided in the side wall portion 12A of the slide base 10D. It is good also as an aspect which presses the connection fixing tool 70 toward the said connection part by cam action. Alternatively, the pair of cam levers are connected by a connecting shaft, and the connecting shaft is inserted through the through hole through which the slide base 10D passes in the width direction and the pair of connecting fixtures 70, and connected by the cam action of the cam lever. It is good also as an aspect which presses the fixing tool 70 toward the said connection part.
In the present embodiment, the connecting plate 46 having the inclined surface 47a is provided in the air cylinder 40A, the notch groove 9 is provided in the side wall portion 12A of the slide base 10D, and the female screw hole 17 is provided on the slide base 10D side. Although the aspect which provided this is illustrated, it is not restricted to such an aspect. For example, these may be provided in reverse. That is, the connecting plate provided at the front end of the air cylinder 40A may be thick, and a notch groove may be provided on the connecting plate side, and a female screw hole may be provided in the connecting plate. Alternatively, instead of providing the cutout groove 9 in the slide base 10D, a connecting plate having the female screw hole as described above may be provided at the rear end of the slide base 10D.
Further, for positioning the slide base 10D and the connecting plate 46, a guide pin or the like is projected on one side along the slide direction, and a positioning hole or the like corresponding to the guide pin is provided on the other side. Good.

Next, still another embodiment according to the present invention will be described with reference to the drawings.
FIGS. 23 (a) and 23 (b) both show the particulate matter material transport switching device according to the fifth embodiment, FIG. 23 (a) is a diagram corresponding to FIG. 20 (a), and FIG. FIG. 23 is a diagram corresponding to FIG.
The difference from the fourth embodiment is mainly the configuration of the locking fastener. The same components are denoted by the same reference numerals, and the description thereof will be omitted or briefly described.
Further, the granular material transport switching device 1D according to the present embodiment is similar to the granular material transport switching device 1 according to the first embodiment, and is described with reference to FIG. Is applicable.

The transport switching device 1D according to the present embodiment is different from that of the fourth embodiment in the connecting fixture and the operation handle that constitute the locking fastener.
That is, in the connection fixture, the base 71 of the connection fixture 70A disposed on the distal end side of the male screw portion 83A of the operation handle 80A is provided with a female screw hole 75A in place of the insertion hole 75. Yes.
Further, the operation handle 80A is not a pair of operation handles 80 provided in accordance with the pair of connection fixtures 70 as in the fourth embodiment, but a single operation handle 80A with respect to the pair of connection fixtures. Has been.

Similar to the operation handle 80, the operation handle 80A is substantially L-shaped and includes a handle portion 81 and a restricting portion 82. Unlike the operation handle 80, a long male screw portion 83A is continuously provided at the tip of the restricting portion 82.
The male screw portion 83A is inserted through the insertion hole 75 of the base portion 71 of the coupling fixture 70 disposed on the base end side of the male screw portion 83A and penetrates in the width direction of the bottom portion 11A of the slide base 10E. It is inserted through the provided through hole 18 and has a length capable of being screwed into the female screw hole 75A of the connecting fixture 70A disposed on the distal end side of the male screw portion 83A across the slide base 10E.
That is, in the transport switching device 1D, the male screw portion 83A of the operation handle 80A is inserted into the insertion hole 75 of the connection fixture 70 arranged on the proximal end side, and is inserted into the through hole 18 of the slide base 10E. The male screw portion 83A protruding from the outer wall surface of the slide base 10E is screwed into the female screw hole 75A of the connecting fixture 70A. In this state, the locking claws 72 and 72 of the respective connecting fixtures 70 and 70A are locked to the notch groove 9 and the end portion 47 of the connecting plate 46 in the same manner as described above, and the operation handle 80A is rotated in the tightening direction. As a result, the connecting fixtures 70 and 70A inserted through the male screw portion 83A and screwed together are pressed toward each other, that is, toward the connecting portion between the slide base 10E and the connecting plate 46. Thereby, similarly to the above, the coupling and fixing of the slide base 10E and the air cylinder 40A are firmly performed.

The male screw portion 83A does not need to be threaded from the tip of the restricting portion 82, and is threaded only at least at the tip portion, that is, at a portion screwed with the female screw hole 75A of the connecting fixture 70A. Also good.
Further, as in the fourth embodiment, instead of the mode in which the operation handle 80A is screwed to the connection fixture 70A and each connection fixture 70, 70A is pressed toward the connection portion, the operation handle is a cam lever, The shaft of the cam lever is inserted into the base-side connecting fixture 70 and is also inserted into the through hole 18 of the slide base 10E so that the same connecting fixture 70 is rotatably held at the tip thereof. Also good. In this case, the connecting fixtures 70 are pressed against the connecting portion by the cam action of one cam lever.

Next, still another embodiment according to the present invention will be described with reference to the drawings.
24 (a) to 24 (c) each show a transport switching device for granular material according to the sixth embodiment, (a) is a diagram corresponding to FIG. 20 (a), and (b) is FIG. FIG. 2C is a view taken in the direction of arrow W2 in (a) with the switching valve removed, and FIG. 3C is a view taken in the direction of arrow W2 in FIG.
The difference from the fourth embodiment is mainly the configuration of the locking fastener. The same components are denoted by the same reference numerals, and the description thereof will be omitted or briefly described.
Further, the granular material transport switching device 1E according to the present embodiment is similar to the granular material transport switching device 1 according to the first embodiment, and is described with reference to FIG. It is applicable to.

The locking fastener of the transport switching device 1E according to the present embodiment includes a swing bolt portion 76 and a knob operation portion 84.
The swing bolt portion 76 includes a holding portion 79 fixed to the outer wall near the rear end portion of the side wall portions 12 and 12 of the slide base 10F, and a bolt supported by the holding portion 79 so as to be rotatable (swingable). A connecting shaft 77 and a male screw part 78 fixed to the bolt connecting shaft 77 are provided.
The knob operation part 84 includes a knob part 85 that is knurled and a restriction part 86 that is connected to one end of the knob part 85, and a female screw hole is formed from the restriction part 86 side.

Further, the slide base 10F is formed with a flange portion 19 extending outward in the width direction on the outer wall of the rear end portion of the side wall portions 12 and 12 in place of the notch groove 9, respectively. 19 is formed with a notch 19a for receiving the male screw part 78 of the swing bolt part 76.
Further, the connecting plate 46A fixed to the front end surface of the cylinder casing 41 of the air cylinder 40A has its both end portions 47A, 47A extending in accordance with the extending width of the flange portion 19, and these both end portions 47A, 47A, Also in 47A, notches 48 and 48 similar to the above are formed at positions where they are aligned.

In the transport switching device 1E according to the present embodiment having the above-described configuration, the male screw portion 78 of the swing bolt portion 76 in a state where the cutout portion 19a of the slide base 10F and the cutout portion 48 of the connecting plate 46A are aligned. And are accommodated in these notches 19a and 48. In this state, when the knob portion 85 screwed to the tip of the male screw portion 78 is turned to the tightening side, the connecting plate 46A is moved to the rear side of the slide base 10F by the restriction portion 86 of the knob operation portion 84. The slide base 10F and the air cylinder 40A are connected and fixed by being pressed against the end. That is, also in the present embodiment, the pair of swing bolt portions 76 and the pair of knob operation portions 84 constitute a pair of connection fixtures disposed across the connection portion between the slide base 10F and the air cylinder 40A. By operating the knob portion 85 serving as a manual operation portion to the tightening side, connection and fixing are performed so as to sandwich the flange portion 19 of the slide base 10F and the end portion 47A of the connection plate 46A.
In addition, the aspect of the knob | pick part 85 which comprises a manual operation part is not restricted to the knurled knob knurled like an example of a figure, It is good also as things, such as a handle shape and a wing nut shape.
Further, instead of the above aspect, the cam portion of the slide base 10F and the end portion 47A of the connecting plate 46A are clamped by the cam action of the cam lever in which the connecting shaft is rotatably supported by the holding portion. It is good also as an aspect which connects and fixes these.

As described above, in the fourth embodiment to the sixth embodiment, the configuration of each locking fastener is provided with a pair of connecting fixtures arranged across the connecting portion between the slide base and the air cylinder, and each manual Examples of the structure in which the slide base and the air cylinder are connected and fixed by operating the operation portion so as to sandwich the slide base and the air cylinder are illustrated. However, the present invention is not limited to these. Are connected and fixed with locking fasteners having a manual operation part, and when the manual operation part is operated and the connection and fixation between the slide base and the air cylinder are released, the switching valve is moved from the slide base to the slide direction. A structure that can be taken out along and removed.
Moreover, although the said 4th Embodiment thru | or 6th Embodiment has shown the example which applied the slide base which has the notch parts 15 and 16 similar to the slide base 10 demonstrated in the said 1st Embodiment, the said 1st The switching valve 20A described in the second embodiment, the slide base 10A according to the first modification, the slide base 10B according to the second modification, the switching valve 20B according to the first modification, and the switching valve 20C according to the second modification. Any one of them may be combined and applied to each of the transport switching devices described in the fourth to sixth embodiments.

(A), (b) is a schematic longitudinal cross-sectional view which shows an example of embodiment of the transport switching apparatus of the granular material which concerns on this invention. It is a disassembled schematic perspective view of the principal part of the transport switching device. (A)-(c) all show the slide base of the same transport switching device, (a) is a schematic plan view, (b) is a schematic longitudinal sectional view taken along line X1-X1 in (a), (C) is a schematic longitudinal cross-sectional view taken along line Y1-Y1 in (a). (A)-(d) is explanatory drawing for demonstrating all the switching operation | movement of the switching valve of the said transport switching apparatus, (a) is a schematic plan view, (b) is the outline of (a). (C) is a schematic plan view, and (d) is a schematic longitudinal sectional view of (c). (A)-(c) is a schematic plan view which shows typically operation | movement of the switching valve drive means at the time of switching operation | movement of the switching valve of the said transport switching apparatus. (A)-(d) is explanatory drawing for demonstrating the state by which the granular material is bitten by the transport switching apparatus, (a) is a schematic plan view, (b) is ( (a) is a schematic longitudinal sectional view, (c) is a schematic plan view, and (d) is a schematic longitudinal sectional view of (c). (A)-(d) is a schematic plan view which shows typically operation | movement of the switching valve drive means in the state in which the granular material is bitten by the transport switching device. It is a schematic system diagram which shows typically an example of the transportation system of granular material to which the present invention was applied. (A)-(c) shows all the other examples of the slide base of the same transport switching device, (a) is a schematic plan view, (b) is a schematic longitudinal section taken along line X2-X2 in (a). A top view and (c) are schematic longitudinal cross-sectional views by the Y2-Y2 line arrow in (a). (A)-(c) shows all the other examples of the slide base of the same transport switching device, (a) is a schematic plan view, (b) is a schematic view taken along line X3-X3 in (a). A longitudinal cross-sectional view, (c) is a schematic vertical cross-sectional view taken along line Y3-Y3 in (a). (A), (b) is a schematic longitudinal cross-sectional view which shows other embodiment of the transport switching apparatus of the granular material which concerns on this invention. (A), (b) both show the switching valve of the same transport switching device, (a) is a schematic bottom view, (b) is a schematic vertical cross-sectional view taken along the line Z1-Z1 in (a). , (C), (d) both show the slide base of the transport switching device, (c) is a schematic plan view, (d) is a schematic vertical sectional view taken along line X4-X4 in (c). It is. (A)-(d) is the figure corresponding to FIG. 6, respectively. (A)-(d) is a figure corresponding to Drawing 7, respectively. (A), (b) shows the other example of the switching valve of the same transport switching device, (a) is a schematic bottom view, (b) is a schematic view taken along the line Z2-Z2 in (a). Longitudinal sectional views, (c) and (d) each show still another example of the switching valve of the transport switching device, (c) is a schematic bottom view, and (d) is Z3- in (c). FIG. 3 is a schematic vertical sectional view taken along line Z3. (A), (b) is a schematic longitudinal cross-sectional view which shows further another embodiment of the transport switching apparatus of the granular material which concerns on this invention. (A)-(d) is the figure corresponding to FIG. 6, respectively. (A)-(d) is a figure corresponding to Drawing 7, respectively. It is a disassembled schematic perspective view which shows other embodiment of the transport switching apparatus of the granular material which concerns on this invention, and shows the principal part typically. (A) is a partially broken schematic plan view schematically showing the transport switching device, and (b) is a diagram similar to (a) for explaining the switching valve removal operation. It is the same figure as Fig.20 (a) for demonstrating the removal operation | movement. (A) is a partially broken schematic plan view schematically showing a state in which the switching valve is removed from the transport switching device, and (b) is a W1 arrow view in (a). (A), (b) shows the further another embodiment of the transport switching apparatus of the granular material which concerns on this invention, (a) is a figure corresponding to Fig.20 (a), (b) ) Is a diagram corresponding to FIG. (A)-(c) shows further another embodiment of the transport switching apparatus of the granular material which concerns on this invention, (a) is a figure corresponding to Fig.20 (a), (b) ) Is a view taken in the direction of arrow W2 in (a) with the switching valve removed, and (c) is a view taken in the direction of arrow W2 in (a) of the switching valve drive means in the removed state. (A)-(d) is explanatory drawing which shows typically the switching operation | movement of the switching valve in the conventional switching apparatus, (a), (b), (d) is a schematic plan view, (c) ) Is a schematic plan view and a schematic longitudinal sectional view thereof.

Explanation of symbols

1, 1A, 1B, 1C, 1D, 1E Transport switching device for granular material 3A A material upstream air transport path (upstream air transport path)
3B B material upstream air transport path (upstream air transport path)
4 Downstream air transport path 10, 10A, 10B, 10C, 10D, 10E, 10F Slide base 13 Front side opening (upstream side opening)
14 Rear opening (upstream opening)
15, 15A, 15B Front side cut portion (slide base cut portion)
16, 16A, 16B Rear side notch (slide base notch)
20, 20A, 20B, 20C Switching valve 22 Through-hole portion 28, 28A, 28B Front side cutting portion (switching valve cutting portion)
29, 29A, 29B Rear side notch (notch part of switching valve)
30 Base cover 31 Downstream side opening 40, 40A Air cylinder (switching valve drive means)
70, 70A Connecting fixture (locking fastener)
80, 80A operation handle (locking fastener)
81 Handle part (manual operation part)
76 Swing bolts (locking fasteners, connecting fixtures)
84 Picking operation section (locking fasteners, connecting fixtures)
85 Pick section (manual operation section)
p Powder material

Claims (11)

It is a transport switching device for particulate material interposed between an upstream air transportation path branched into two systems corresponding to two types of particulate materials and a downstream air transportation path of one system,
A slide base having two independent upstream openings communicating with the two upstream air transport paths, a plate-like switching valve having a through hole at substantially the center, and the switching A base cover which is located downstream of the valve and has a downstream opening communicating with the downstream air transport path; and a sliding control of the switching valve so that the through-hole portion is the two independent upstream ports. Switching valve driving means for aligning with each of the side openings,
A transport switching device for granular material, wherein a cut end portion extending toward a side close to each other is formed at each of the adjacent end portions of the two independent upstream openings. In claim 1,
Each of the upstream openings is substantially circular in plan view,
The said cut | notch part is formed in the small circular arc shape by which the curvature radius was made smaller than the radius of these upstream opening parts by planar view, The transport switching apparatus of the granular material material characterized by the above-mentioned. In claim 1,
The incision part is formed in a tapered shape in a plan view, and the transport switching device for granular material, In any one of Claims 1 thru | or 3,
The said cutting part is made into the level | step difference shape which cut and formed the recess only in the said switching valve side, The transport switching apparatus of the granular material material characterized by the above-mentioned. It is a transport switching device for particulate material interposed between an upstream air transportation path branched into two systems corresponding to two types of particulate materials and a downstream air transportation path of one system,
A slide base having two independent upstream openings communicating with the two upstream air transport paths, a plate-like switching valve having a through hole at substantially the center, and the switching A base cover which is located downstream of the valve and has a downstream opening communicating with the downstream air transport path; and a sliding control of the switching valve so that the through-hole portion is the two independent upstream ports. Switching valve driving means for aligning with each of the side openings,
In the both ends along the sliding direction of the through-hole portion of the switching valve, a cut-out portion extending outward is formed. In claim 5,
The through hole has a substantially circular shape in plan view,
Each of the cut portions is formed in a small arc shape whose curvature radius is smaller than the radius of the through-hole portion in plan view. In claim 5,
The incision part is formed in a tapered shape in a plan view, and the transport switching device for granular material, In any one of Claims 5 thru | or 7,
The said cutting part is made into the level | step difference shape which cut and formed the recess only in the said slide base side, The transport switching apparatus of the granular material material characterized by the above-mentioned. It is a transport switching device for particulate material interposed between an upstream air transportation path branched into two systems corresponding to two types of particulate materials and a downstream air transportation path of one system,
The slide base according to any one of Claims 1 to 4, the switching valve according to any one of Claims 5 to 8, and the downstream air transport path located downstream of the switching valve. A base cover having a downstream opening communicating therewith, and a switching valve driving means that slide-controls the switching valve to align the through hole with each of the two independent upstream openings. A switching device for transporting granular material, comprising: In any one of Claims 1 thru | or 9,
The switching material driving device for a granular material, wherein the switching valve driving means is an air cylinder. In any one of Claims 1 thru | or 10,
The slide base and the switching valve drive means are connected and fixed by a locking fastener having a manual operation part,
When the manual operation unit is operated and the connection and fixation between the slide base and the switching valve driving means are released, the switching valve can be removed from the slide base along the sliding direction and removed. A device for switching the transport of granular material.

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