JPH0119955B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (1) Technical field of the invention The present invention relates to a powder remover for solid objects that removes foreign matter such as powder adhering to the outer surface of solid objects, and more specifically, to remove foreign substances such as powder from the outer surface of special tablets or capsules. This relates to a dust remover for solid objects that automatically removes dust etc. adhering to the surface.

(2) Background of the technology In general, solid products such as tablets or capsules are
After the raw materials have been crushed and mixed, they are press-formed using a tablet machine, and then processed using a powder remover (or polishing machine).
Dust and other particles adhering to the outer surface are removed, and the outer surface is polished or ejected.

An example of such a dust removal machine is disclosed in Japanese Patent No. 1036290 (Japanese Patent Publication No. 55-29743). This powder removing machine has an inlet on the lower upper surface of the inclined cylinder, and an outlet on the upper lower surface. Inside the cylinder, a guide coil is provided on the inner wall, a mesh cylinder is attached, and a drive is attached to the center of the cylinder. A structure in which a brush shaft with a rotating brush that is rotated by a device is rotatably installed inside the cylinder, and a powder outlet is provided in the middle of the cylinder to take out powder that passes through a mesh cylinder and enters between the mesh cylinder and the cylinder. belongs to.

(3) Problems with the Prior Art However, some of the tablets and the like from which dust is removed from the outer surface by the above-mentioned dust removal machine are soft ones and tablets with a rectangular cross section, which are called irregularly shaped tablets. If the powder removal machine having the above structure is used to remove powder from these soft tablets or irregularly shaped tablets, there is a problem that the powder removal effect is not sufficient.

That is, the surface of soft tablets is abraded by the rotating brush of the brush shaft during the powder removal process and deformed into a thin shape, and irregularly shaped tablets have problems in that the rounded portions of the tablets are damaged. Therefore, attempts were made to solve the above problem by shortening the length of the cylindrical body of the powder remover and reducing the brush polishing process in which the tablets come into sliding contact with the rotating brush of the brush shaft. Although it is effective, it is not so effective against irregularly shaped tablets, and the fundamental solution to the above problem has not yet been obtained.

(4) Purpose of the invention In view of the above problems, the present invention provides soft tablets,
To provide a solid powder removing machine which does not deform or damage tablets or capsule tablets of different quality and shape, and which has an excellent powder removal effect.

(5) Structure of the Invention In order to achieve the above object, the present invention has a solid material removing machine configured as follows.

An outer cylindrical body located on the outside and a drive means located inside the outer cylindrical body rotate in an arbitrary rotation direction and rotation speed with the axial direction of the outer cylindrical body as the rotation axis, and a large number of holes are formed in the wall. In addition, a porous cylindrical body having a structure in which a mesh mat is attached to the inner wall surface, and a drive means located inside the porous cylindrical body and different from the driving means of the porous cylindrical body, rotate the axial direction of the porous cylindrical body as an axis of rotation. A dust removal mechanism is composed of a brush shaft having a rotating brush on the outer periphery that rotates at the number of rotations, and an inlet for introducing solid matter into one end of the porous cylinder into the dust removal mechanism, and the porous cylinder. A discharge port for discharging solids from the end is provided, and the porous cylinder and brush shaft are rotated at a desired rotation speed to remove dust adhering to the outer surface of the solids input from the input port inside the rotating porous cylinder. A powder removal machine for solids that uses a rotating brush to remove the powder by sliding contact and discharges the solids from which the powder adhering to the outer surface has been removed from the discharge port.

Additionally, a guide coil is provided along the inner wall of the porous cylinder of the dust removal mechanism.

(6) Embodiment of the invention Hereinafter, an embodiment of the present invention will be described based on the drawings.

In the figure, 1 is a cylindrical outer tube placed on the outside, and 4 is rotatable inside the outer tube 1 (for example, about 30 cm in length and about 15 cm in diameter) with the axial direction of the outer tube 1 as the rotation axis. For example, it is a perforated cylinder made of stainless steel and has a structure in which a large number of holes are formed in the wall and a mesh mat 5 made of a net material is arranged on the inner wall surface. The brush shaft 6 has a structure in which a rotating brush 6a is disposed on the outer periphery of the cylinder 4, which is rotatably arranged around the axial direction of the cylinder 4 as a rotation axis.

The outer cylinder 1, perforated cylinder 4, and brush shaft 6 constitute a dust removal mechanism of the solid material dust removal machine according to the present invention, as will be described later. The outer cylinder 1 is provided with a front end cover 2 and a rear end cover 3 at both ends thereof, and is fixed to a machine frame (not shown).

Both ends of the porous tube 4 are rotatably supported by the front end cover 2 and the rear end cover 3, and a ring gear 18 for rotating the porous tube 4 is provided on the outer periphery near one end. A pinion 17 is fitted into the pinion 17. The pinion 17 is connected to the intermediate shaft 1
A driven toothed wheel 10b is fixed to the other end of the intermediate shaft 14, and its central portion is held by a shaft bearing case 15 containing a bearing 16. Furthermore, a guide coil 28 is provided on the inner surface of the mesh mat 5 of the perforated cylinder 4 along the inner wall of the perforated cylinder 4 in order to more smoothly transfer the solids supplied into the perforated cylinder 4. The thickness, number of turns, etc. of the guide coil 28 are appropriately selected depending on the type of solid material.

The brush shaft 6 is rotatably supported at both ends within the perforated cylinder 4 by a front shaft bearing case 7 and a rear shaft support case 8, each housing a bearing 9 therein. The tip of the rotating brush 6a of the brush shaft 6 is formed so as to be in contact with the mesh mat 5 provided on the inner wall of the porous cylinder 4. In addition, in the front shaft bearing case 7 and rear shaft bearing case 8, 11 is a drive shaft, 12 is a socket,
13 is a V ring. A driven tooth type wheel 10a is disposed on the drive shaft 11. Further, the driven tooth type wheel 10b, the driven tooth type wheel 10a, etc. are protected by a gear cover 24.

The dust removal mechanism composed of the outer cylinder 1, the perforated cylinder 4, and the brush shaft 6 is provided with an input port 25 for supplying solids at the front end of the perforated cylinder 4, and the powder is supplied from the rear end of the perforated cylinder 4. A discharge port 26 is provided for discharging the solid matter. In addition, in order to smoothly charge and discharge solids into and out of the porous tube 4 rotating inside the outer tube 1, the input port 25 and the outlet port 26 are provided at the upper surface of the front end of the outer tube 1 and at the rear of the outer tube 1, as shown in the figure. Although the structure is such that it is provided on the bottom surface of the end, the input port 25 is located in the porous tube 4.
Any device may be used as long as it can supply solids to the front end of the outer cylinder 1, and is not limited to the upper surface of the front end of the outer cylinder 1. For example, an input port is provided at the upper part of the outer cylinder 1, and an opening is provided in the perforated cylinder 4. It goes without saying that solid matter may be intermittently supplied into the porous tube 4 each time the porous tube 4 rotates and reaches the lower part of the inlet. Further, a damper 21 is provided on the lower surface of the outer cylinder 1.
and a powder outlet 2 with an air intake adjustment band 22
A dust collection box 20 having a dust collection box 7 is provided.

The rotation of the brush shaft 6 and the perforated tube 4 is as follows:
The driving force of drive means (not shown) such as variable speed motors provided individually is applied to the driven tooth type wheel 1.
0b and the driven tooth type wheel 10a, rotation can be performed in any direction and at any rotation speed.

In the powder remover having the above structure, the tablets, capsules, or other solid substances inputted from the input port 25 are transferred to the brush shaft 6 rotating inside the perforated cylinder 4.
After falling into the rotating brush 6a, the guide coil 2 is pressed against the mesh mat 5 by centrifugal force and is rotated by the spiral movement of the rotating brush 6a.
8 and advances in the discharge direction and is discharged from the discharge port 26. In addition, at this time, the dust remover is inserted into the input port 25.
If the discharge port 26 side is sloped lower than the other side, it is effective to transfer the solids in the discharge direction.

The rotating brush 6a is inside the rotatably moving porous cylinder 4.
The dust removed by the above passes through the mesh of the mesh mat 5 and the wall holes of the perforated cylinder 4, and is then removed from the input port 25 and the discharge port 26 by a suction device (not shown) attached to the end of the powder outlet 27. The particles are collected near the dust collection box 20 by riding on the airflow flowing in the direction of the powder outlet 27. The collected dust is sucked up from the powder outlet 27 by a dust collector (not shown).

Note that the rotational speed and direction of each of the porous tube 4 and the brush shaft 6 are appropriately selected depending on the type of solid material such as a tablet or a capsule. For example, for soft tablets, irregularly shaped tablets, etc., the relative rotational speed difference between the perforated cylinder 4 and the brush shaft 6 can be reduced by making the rotation direction of the perforated cylinder 4 and the brush shaft 6 the same, but making the rotation speed different. This prevents excessive scraping of the soft tablet and damage to the corners of the irregularly shaped tablet. In addition, in the case of capsule tablets, by reversing the rotational direction of the perforated tube 4 and the rotational direction of the brush shaft 6, it is possible to increase the relative rotational speed difference between the two, thereby improving the powder removal effect and polishing effect. becomes.

Note that the method of rotating the perforated tube 4 is not limited to driving the ring gear 18 and pinion 17 to fit together as shown in this embodiment, and other methods may also be used.

(7) Effects of the Invention As explained above, according to the present invention, since the rotational speed and rotational direction of the brush shaft and the perforated tube can be selected independently and arbitrarily, it is possible to prevent particles from adhering to solid objects such as irregularly shaped tablets and soft tablets. This has an excellent effect in that dust can be automatically and continuously removed without damaging or deforming the solid object, and powder adhering to the solid object can be quickly and reliably removed.

[Brief explanation of drawings]

The figure is a cross-sectional view of the main parts of a dust removal machine showing an embodiment of the present invention. In the figure, 1...outer cylinder, 2...front end cover, 3...rear end cover, 4...porous cylinder, 5...mesh mat, 6...brush shaft, 6a...rotating brush, 7...front Partial shaft bearing casing, 8... Rear shaft bearing casing, 9, 16... Ball bearing, 10a, 10b... Driven toothed wheel, 11... Drive shaft, 12... Socket, 13...
...V ring, 14... intermediate shaft, 15... shaft bearing case,
17...Pinion, 18...Ring gear, 19...
...Cam follower, 20...Dust collection box, 21...Dunbar, 22...Air intake adjustment band, 23...Mounting plate, 24...Gear cover, 25...Inlet, 2
6...Discharge port, 27...Powder outlet, 28...Guide coil.

Claims (1)

[Scope of Claims] 1. An outer cylindrical body located on the outside, and a drive means located inside the outer cylindrical body that rotates in an arbitrary rotational direction and rotational speed with the axial direction of the outer cylindrical body as the rotation axis, and A porous cylindrical body having a structure in which a large number of holes are formed and a mesh mat is attached to the inner wall surface; A dust removal mechanism is constructed with a brush shaft having a rotating brush on the outer periphery, which rotates at an arbitrary rotation speed with the direction as the rotation axis, and solid material is introduced into one end of the porous cylinder into the dust removal mechanism. A solid material dust removal machine characterized by being provided with a discharge port for discharging solid materials from a mouth and the other end of a porous cylindrical body. 2. The solid material dust removal machine according to claim 1, characterized in that a guide coil is provided along the inner wall of the porous cylinder of the dust removal mechanism.