JP2987535B2 - Pneumatic transport method and system for solid material, and transport plug for pneumatic transport of solid material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for pneumatically transporting solid materials such as tablets at low speed and high density, and a pneumatic transportation system for solid materials used in the method. The present invention relates to a transportation stopper for pneumatic transportation.

[0002]

2. Description of the Related Art As a pneumatic transportation means of this kind of solid material, the present applicant has previously developed and proposed the one described in Japanese Patent Application No. 2-196002. That is, as shown in FIG. 6, the means transfers a predetermined transport plug B inserted into the material transport pipe 1e by supplying a transport gas into the material transport pipe 1e. After the solid material is supplied from the material supply port 2e of the solid material provided at the start end side into the space 14 formed between the two plugs 10, 10a of the transport plug B and stored therein, the transport is performed. The stopper B is pneumatically transported to the material discharge port 7e at the end of the material transport pipe 1e. According to such a means, it is possible to carry out transportation in which damage such as cracks is prevented as much as possible without giving an impact or the like to the solid material. On the other hand, the tablets manufactured by the tableting machine 3 are collected by a predetermined collector 8.
In a system that pneumatically transports to the position of
From the viewpoint of the structure and space saving of the device, and the convenience of connecting other devices to the tableting machine 3 and the collector 8, the end 1g side of the material transport pipe 1e is set higher than the start end 1f side. It is generally done. In such a case, conventionally, in order to stably supply the material from the material supply port 2e to the transport stopper B and discharge the material from the transport stopper B to the material outlet 7e, the starting end 1f of the material transport pipe 1e is conventionally used. The vicinity of each of the side and the end 1g side was made horizontal, and the central part thereof was bent in a curved tube by using a bend pipe 20 or the like.

[0003]

However, according to the above-mentioned means, since the solid material is accommodated in the space 14 formed between the two stoppers 10 and 10a of the transport stopper B and pneumatically transported, In the case where the solid material is a very small tablet or the like, as shown in FIG. 7, when the transport stopper B moves, the inside of the minute gap H between the plug 10a on the rear side thereof and the inner peripheral surface of the material transport pipe 1e is reduced. Therefore, there is a risk that the solid material K may bite into the material, and the solid material K may be damaged or leak backward. Also, as an important problem, in the pneumatic transport system using this type of transport stopper, the inner diameter of the material transport pipe needs to be uniform at various places. However, the material transport pipe 1e is bent into a curved pipe using the bend pipe 20. According to the above-described means, the inside diameter of the bend pipe 20 is different from the inside diameters of the other straight tubular portions. Therefore, the gap between the transport stopper B and the material transport pipe 1e at the position of the bend pipe 20 becomes large,
The bite of the solid material is more likely to occur. As means for solving this problem, for example, it is possible to manufacture the bend pipe 20 by shaving, etc., and to set the same inner diameter as the other straight tubular portions. Is very expensive, which is economically disadvantageous. Moreover, even if such processing is performed, as shown in FIG. 8, the transport stopper B must pass between the transport stopper B and the material transport pipe 1 e without passing through the bend pipe portion of the material transport pipe 1 e. Since some gaps H1 are generated, it is difficult to thoroughly prevent the solid material K from biting and leaking.

[0004] The present invention has been made in view of the above points, and an object of the present invention is to provide a material transport pipe with a bend pipe or the like when pneumatically transporting a solid material to a position higher than a material supply port. An advantage of the present invention resides in that appropriate pneumatic transportation of a solid material that does not cause biting of the solid material between the transport stopper and the material transport pipe is performed without using the material.

[0005]

According to a first aspect of the present invention, there is provided a pneumatic transportation method for a solid material according to the present invention, wherein the material supply port for the solid material is provided. A space for accommodating a solid material between two plugs in a material transport pipe in which a straight pipe is formed from a side to an end side provided with a material discharge port and the end side is set higher than the start end side. A method for pneumatically transporting a solid material by pneumatically transporting a transport plug formed with a portion, comprising: supplying a solid material supplied from the material supply port into the space of the transport plug with a plug body on the rear side of the transport plug. The transport plug is pneumatically transported to a position passing through the material discharge port on the terminal side of the material transport pipe in a state of being accommodated in the auxiliary cylinder arranged in contact with the front surface of the transport plug, and thereafter, the rear side of the transport plug. Plug and auxiliary cylinder are higher than the material outlet By separating at location, a structure to discharge by sliding down the solid material is housed in the auxiliary cylinder to the material outlet.

Further, the solid material pneumatic transport system according to the present invention according to claim 2 proposed for carrying out the solid material pneumatic transport method, comprises a material transport pipe provided with a material discharge port. Is set at a position higher than the starting end of the material transport pipe provided with the material supply port for the solid material, and the solid material supplied from the material supply port is provided in the material transport pipe by two. A pneumatic transport system for a solid material, wherein a transport plug for accommodating in a space formed between the plugs and pneumatically transporting to a material discharge port side is movably provided by supply of a transport gas, The material transport pipe is formed in a straight tubular shape from the start end side to the end side, and is extended so that the transport stopper can move to a position beyond the material discharge port, and between the two stoppers of the transport stopper. , Sliding stopper on the inner peripheral surface of the material transport pipe A cylindrical auxiliary cylinder that is both pneumatically transported is provided, and the auxiliary cylinder abuts a plug on the rear side of the transport plug when the transport plug is advanced, and holds and holds the solid material in the space, and transports the solid material. When the plug reaches the part beyond the material outlet, it separates from the rear plug and reciprocates between the two plugs to slide the solid material from the gap to the material outlet. It is configured to be possible.

Further, the transport plug for pneumatically transporting a solid material according to the present invention according to claim 3 proposed to carry out the above-mentioned method for transporting a solid material by pneumatic power, comprises: A transport plug for pneumatically transporting a solid material that is received and pneumatically transported through a material transport pipe, wherein an inner peripheral surface of the material transport pipe is provided between two plugs forming a material storage space. The auxiliary cylinder is configured to be reciprocally movable between the two plugs so as to be able to freely contact and separate from the front surface of the plug on the rear side.

[0008]

According to the first aspect of the present invention, there is provided a method for pneumatically transporting a solid material according to the present invention, wherein an auxiliary cylinder is provided on a front part of a rear plug of two plugs of a transport plug. In the abutted state, the solid material is accommodated in the auxiliary cylinder and the transport stopper is transported, so that the solid material does not come into contact with the inner peripheral surface of the material transport pipe during the transport, and the straight tube is formed. , And can be pneumatically transported at a low speed to a position beyond the material discharge port.
Since the solid material is accommodated in the auxiliary cylinder, and the material transport pipe is a straight tube with a high end, the solid material in the auxiliary cylinder is immediately discharged when the transport stopper passes through the material discharge port. It is not discharged into the mouth. However, after that, by separating the plug on the rear side of the transport plug and the auxiliary cylinder and forming a gap between the two,
The solid material in the auxiliary cylinder can be slid down from the gap, so that it can be appropriately discharged to the material discharge port located below the transport stopper. Therefore, according to the above-described series of transport of the solid material, there is no chance that the solid material will bite between the transport stopper and the material transport pipe, and damage to the solid material is prevented. Becomes

Further, in the solid material pneumatic transport system according to the second aspect of the present invention, the auxiliary cylinder of the transport plug is set in a state in which the auxiliary cylinder is in contact with the front surface of the rear plug. By disposing the transport stopper at the start end side of the material transport pipe, a solid material can be stored in the auxiliary cylinder from a material supply port. After that, the transport cock is pneumatically transported to the extended position beyond the material discharge port of the material transport pipe, and at this position, the auxiliary cylinder of the transport cock and the plug on the rear side are separated from each other. The solid material contained in the auxiliary cylinder can be slid down from the gap to the material discharge port. Therefore, the pneumatic transportation method of the solid material material according to claim 1 can be appropriately performed.

Further, in the transportation plug for pneumatically transporting a solid material according to the present invention according to the third aspect of the present invention, the transportation stopper is provided so as to be able to reciprocate between two stoppers forming a material storage space. By contacting the auxiliary cylinder with the plug on the rear side, the solid material can be accommodated in the auxiliary cylinder, and by separating the auxiliary cylinder, a gap for discharging the solid material is created between the two. be able to. Therefore, the transportation stopper can also be directly applied to the pneumatic transportation method of the solid material material according to the first aspect.

[0011]

An embodiment of the present invention will be described below with reference to the drawings. First, a description will be given of one embodiment of a transport plug A for pneumatic transport of a solid material according to the present invention. FIG. 2 is a perspective view thereof. As shown in the figure, the transport stopper A is formed by connecting two disk-shaped stoppers 10, 10a made of Teflon or the like with a connecting rod 11 made of silicon resin or the like. When the two plugs 10, 1 are inserted into the tube 1,
A space portion 14 for accommodating the solid material is formed between 0a. A cylindrical auxiliary cylinder 12 formed separately from the plugs 10, 10a is provided between the plugs 10 and 10a.
Are interposed so as to be able to reciprocate in the front-rear direction along the connecting rod 11 so as to be able to contact and separate from at least the front surface portion 10A of the plug 10a on the rear side. The auxiliary cylinder 12 has an outer shape D set so as to be able to slide on an inner peripheral surface of a material transport pipe 1 described later. For example, a synthetic resin containing a magnetic material is applied as the material, and the auxiliary cylinder 12 is described later. Electromagnet 16, 1
6 is configured to be magnetically attractable. As another means for making the auxiliary cylinder 12 magnetically attractable, a means for winding or embedding a magnetic material around the outer periphery of the auxiliary cylinder 12 is also applicable. Reference numeral 13 denotes a tapered surface formed on the distal end side of the auxiliary cylinder 12.

Next, an embodiment of a pneumatic transport system for solid materials according to the present invention using the transport stopper A will be described.
FIG. 1 is a schematic sectional view showing a case where the present invention is applied to a system for pneumatically transporting a medicine tablet as a solid material produced by a tableting machine. As shown in FIG. 1, in the present system, a material transport pipe 1 for performing the pneumatic transport guide of the transport stopper A described above.
The bend pipe is not used, and is formed in a straight tubular shape in which the start end 1a to the end 1b are inclined, and the end 1b side is set higher than the start end 1a side.
A material supply port 2 for supplying a medicine tablet K is provided on an upper surface portion on the starting end 1a side of the material transport pipe 1. The material supply port 2 has a tableting machine 3 for sequentially manufacturing medicine tablets. , Duster 4 for removing dust from medicine tablets, packer type damper 5a
And a hermetic transport tank 5 having a conic valve 5b that opens and closes by the supply of compressed air are connected in series. It is configured such that a fixed amount is dropped and supplied to the material supply port 2. Reference numeral 6 denotes a pressurized air nozzle that blows compressed air to the medicine tablet K in order to prevent a so-called bridging phenomenon in which the medicine tablet K dropped and supplied to the material supply port 2 side adheres to the housing and causes clogging. Also,
A transport gas control means GC for controlling the supply and suction of the transport gas (pressurized gas) into the material transport pipe 1 is connected to the most initial position of the material transport pipe 1. It is configured to be pneumatically transported at a low speed to the end 1b side of the material transport pipe 1 by the supply, and to be retracted and returned to the start end 1a side by suction.

On the other hand, a material discharge port 7 is provided on the lower surface of the material transport pipe 1 on the side of the terminal end 1b, and a collector 8 is connected to the material discharge port 7 via a discharge pipe 9. The opening at the lower end of the discharge pipe 9 can be opened and closed by a conic valve 8a, and a storage tank, a buffer shooter, etc. (not shown) are connected to the lower part of the collector 8 as necessary.
At the end 1 b of the material transport pipe 1, a transport plug described later than the material outlet 7 so that the transport stopper A can pass through the material outlet 7 and reach a higher position than the material outlet 7. An extension 1c is provided which extends rearward by approximately the same dimension as the length of A. A set of electromagnets 16, 16 capable of fixing and holding the extended Linder 12 by magnetic force is disposed. A suction pipe 15 connected to a vacuum pump or the like is connected to the final end of the material transport pipe 1. When the transport stopper A reaches the extension 1c, the suction action of the suction pipe 15 causes the transport stopper A to move. The transportation stopper A can be fixedly held. In addition, in this system, the starting end 1a of the material transport pipe 1
In addition, various sensors S1 and S2 for detecting the transport stopper A are disposed at respective portions of the terminal 1b.

Next, an embodiment of a method for transporting solid material by force using the above system according to the present invention will be described. First, the transport stopper A inserted into the material transport pipe 1 is shown in FIG.
As shown by a solid line, the medicine tablets K are dropped and supplied by a predetermined amount from the material transport tank 5 in a state where the medicine tablets K are disposed immediately below the material supply port 2 at the start end 1a of the material transport pipe 1 so that these medicine tablets K are dropped. The transport stopper A is accommodated in the space 14 between the stoppers 10 and 10a. At this time, the auxiliary cylinder 12
Is brought into contact with the front surface portion 10A of the plug 10a on the rear side, and the medicine tablet K sliding down along the inner surface of the inclined material transport pipe 1 is accommodated in the auxiliary cylinder 12. Some of the medicine tablets K are not accommodated in the auxiliary cylinder 12, but these remaining medicine tablets can be accommodated in the auxiliary cylinder 12 when the transport stopper A is moved forward. The tapered surface 13 of the portion facilitates the storage of the medicine tablet K in the auxiliary cylinder 12. After the supply and storage of the medicine tablet K into the transport stopper A is completed, the transport gas is supplied from the transport gas control means GC to the starting end 1a of the material transport pipe 1 in a state where the airtightness of the material transport tank 5 is maintained. As a result, the transport stopper A is pneumatically transported to the end 1b side of the material transport pipe 1 at a low speed. In this case, it is desirable to supply the transport gas by inching at the beginning of transport in order to smoothly raise the transport plug A. During the transportation, as shown in FIG. 3, the medicine tablets K are accommodated in the auxiliary cylinder 12 which comes into contact with the stopper 10a on the rear side of the transportation stopper A. Does not contact the inner peripheral surface of the material transport pipe 1. Accordingly, the medicine tablet K accommodated in the auxiliary cylinder 12 is, for example, the auxiliary cylinder 12 and the material transport pipe 1.
There is no danger of biting between the two, and the pneumatic transport is performed at a low speed with cracks and the like appropriately prevented.

As described above, even if the transport stopper A reaches the material discharge port 7 as a result of the medicine tablet K being held and held in the auxiliary cylinder 12, the medicine tablet K is transferred to the material discharge port 7 as it is. 7 cannot be discharged. Therefore, in the present invention, as shown in FIG. 4, the transport stopper A is pneumatically transported to the position of the extending portion 1c of the material transport pipe 1 beyond the material outlet 7, so that the transport stopper A is connected to the material outlet. 7, and then the auxiliary cylinder 12 and the plug 10a are separated from each other as shown in FIG. The medicine tablet K is discharged. here,
In the state shown in FIG. 4, even if the supply of the transport gas to the material transport pipe 1 is stopped when the sensor S2 detects the arrival of the transport plug A, the transport is performed by operating the suction pipe 15 at the same time. The stopper A can be fixedly held at a predetermined position of the end 1b of the material transport tube 1. Therefore, it is possible to wait for the medicine tablet K to be discharged until the receiving state of the medicine tablet K on the collector 8 side is prepared. In discharging the medicine tablet K shown in FIG.
The suction operation of the suction pipe 15 may be stopped while the electromagnets 16 and 16 are attracted and held at a fixed position. Since the stoppers 10 and 10a can be naturally dropped by stopping the suction of the suction pipe 15, the auxiliary cylinder 12 and the stopper 10a can be separated from each other, and the medicine tablet K can be slid and discharged to the material discharge port 7.

After the medicine tablet K is discharged, the electromagnets 16 and 16 are turned off in the closed state of the conic valve 8a, and the transport stopper A is restored by sucking the material transport pipe 1 by the transport gas control means GC. Can be moved backward to the position of the start end 1a of the above, and the above-described series of operations can be repeated and continued. Transport stopper A returned to starting end 1a of material transport pipe 1
When the auxiliary cylinder 12 is not in contact with the plug 10a on the rear side, the auxiliary cylinder 12 is sucked by an electromagnet type chucking device and is forcibly moved.
Should be brought into contact with. However, the chucking device may be of a type other than the electromagnetic type and may physically hold the auxiliary cylinder 12, or may move and fix the auxiliary cylinder 12 by means other than chucking.

[0017]

As described above, according to the method for pneumatically transporting a solid material according to the first aspect of the present invention, the solid material is accommodated in the auxiliary cylinder of the transport stopper and transported pneumatically. , It is possible to eliminate the bite of the solid material between the transport stopper and the material transport pipe and the leakage from the gap,
Ideal for transporting solid materials with strict quality control. In addition, since the material transport pipe may be formed in a straight tube over its entire length, the manufacturing cost of the pneumatic transport system can be reduced as compared with the conventional one using a bend pipe, and the solid material Eliminating the curved portion of the material transport tube, which is liable to cause biting of the solid material, has an advantage that the solid material can be transported more appropriately. According to the solid material pneumatic transport system of the present invention according to claim 2 and the transport plug for pneumatic transport of solid material according to claim 3, the solid material according to claim 1. It is useful to be able to carry out the pneumatic transportation method properly.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an essential part showing an embodiment of a solid material pneumatic transport system according to the present invention.

FIG. 2 is a perspective view showing one embodiment of a transport plug for pneumatic transport of a solid material according to the present invention.

FIG. 3 is an essential part cross-sectional view showing a state in which the transportation stopper is pneumatically transported.

FIG. 4 is a cross-sectional view of a main part showing a state in which the transport stopper is pneumatically transported to the end position of the material transport pipe.

FIG. 5 is a cross-sectional view of a main part showing a state of discharging a solid material.

FIG. 6 is an explanatory view showing an example of a conventional solid material material pneumatic transport system.

FIG. 7 is a cross-sectional view of a main part showing a state where a solid material is bitten in a conventional solid material pneumatic transport system.

FIG. 8 is a cross-sectional view of a main part showing a state where a solid material is bitten at a curved tubular position of a conventional material transport pipe.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Material transport pipe 1a Start end 1b End 2 Material supply port 7 Material discharge port 10 Plug body (front side) 10a Plug body (rear side) 12 Auxiliary cylinder 14 Space part A Transport plug K Solid material

──────────────────────────────────────────────────続 き Continued on front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B65G 51/04-51/46

Claims (3)

(57) [Claims] 1. A material transport pipe in which a solid material is formed in a straight tubular shape from a starting end provided with a material supply port to an end provided with a material outlet, and the end is set higher than the starting end. A method for pneumatically transporting a solid material by pneumatically transporting a transport plug formed by forming a space for accommodating a solid material between two stoppers, wherein the material supply port is used to pneumatically transport the transport plug. In a state where the solid material supplied to the container is accommodated in an auxiliary cylinder arranged in contact with the front surface of the plug on the rear side of the transporting stopper, the transporting stopper is connected to the material on the terminal side of the material transporting tube. The solid material contained in the auxiliary cylinder is moved by pneumatic transportation to a position passing through the discharge port, and then separating the plug on the rear side of the transport plug and the auxiliary cylinder at a position higher than the material discharge port. To be discharged to the material discharge port Pneumatic transport method of solid material characterized and. 2. An end of a material transport pipe provided with a material discharge port is set at a position higher than a start end of a material transport pipe provided with a material supply port of a solid material. A transport plug for accommodating the solid material supplied from the material supply port in the space formed between the two plugs and pneumatically transporting the material to the material discharge port side is movably provided by the supply of the transport gas. A solid material material pneumatic transport system, wherein the material transport pipe is formed in a straight tubular shape from a start end to an end side so that a transport stopper can move to a position beyond a material discharge port. A cylindrical auxiliary cylinder is provided extending between the two plugs of the transport plug and slidingly in contact with the inner peripheral surface of the material transport pipe and pneumatically transported together with the transport plug. Abuts the plug on the rear side of the transport cock when the When the transport plug reaches the portion beyond the material discharge port, the solid plug material is separated from the rear plug body, and the solid material is transferred from the gap to the material discharge port side. A pneumatic transport system for a solid material, characterized in that it can reciprocate between two plugs so as to slide down. 3. A transport plug for pneumatically transporting a solid material which receives a pressurized transport gas and is pneumatically transported in a material transport pipe, comprising two plugs forming a material storage space. A cylindrical auxiliary cylinder that is in sliding contact with the inner peripheral surface of the material transport pipe is provided between the two plugs so that the auxiliary cylinder can be brought into contact with and separated from the front surface of the rear plug. A transportation stopper for pneumatic transportation of a solid material, wherein the transportation stopper is capable of reciprocating inside.