JPH0238079B2 - KAITENSHIKYUKAKUJOZAIKI - Google Patents

Description

Detailed Description of the Invention (Field of Industrial Application) This invention is a rotary cored tablet for producing cored tablets for pharmaceuticals, etc., which can determine the presence or absence of cored tablets and completely eliminate non-core tablets. It concerns tablet machines.

(Prior art) Generally, in order to manufacture dry-coated tablets used for pharmaceuticals, etc., a first powder is placed in a number of dies arranged on a rotary disk, and then a cored tablet is placed on top of the powder. The core tablet is placed by a core tablet supply device, and after the second powder is further filled on top of the core tablet, it is compressed by an upper punch and a lower punch to obtain a core tablet as a molded product.

Conventionally, it has been impossible to confirm that the core tablets were fed into the mortar at all.If you wanted to confirm this, after taking out the core tablets from the tablet machine, you could calculate the difference in weight, etc. Therefore, it is necessary to sort out whether there are any non-core tablets, and since the core tablets tend to be smaller, it is impossible to sort out differences in weight, etc. The present invention, which allows direct identification of core tablets, is novel.

(Problems to be Solved by the Invention) In a dry-coated tablet used for medicine, etc., the core tablet and the surrounding tablet portion are made of different types of drugs, and when the tablet is taken, two or more parts of the body may be affected. However, in a rotary dry-coated tablet machine that produces dry-coated tablets, the core tablet must be fed into the mortar of a rotary disc that rotates at high speed. The core locks are held in advance in a disk having a large number of holes that synchronize with the disk, and the core locks are dropped one by one from above the mortar.

However, if the rotary core tablet machine stops, the core tablet will fly out of the hole in the disc due to inertia, and this is because a detector etc. can be used to confirm that the core tablet is held in the hole in the disc in advance. This may occur even after the tablet has been processed, and there is a risk that the tablet may be treated as a normal tablet even though the tablet has not actually been fed into the mortar.

In addition, due to scratches on the core lock or the influence of static electricity, the core lock that has been fed into the disc in advance may not be fed into the mortar properly, that is, it may not be fed at all, or the timing of feeding may be incorrect and the core lock may be damaged. It is something that can be broken and ejected, and if such non-core tablets that do not contain core tablets are mixed into the product, hard-coated tablets,
Due to the nature of the dry-coated tablet, there was a problem that it had to be completely eliminated.

(Means for Solving the Problems) In order to solve such problems, according to the present invention, in the mortar hole of the mortar 2 disposed on the rotary disk 1,
Put the first powder 5a and place the core tablet 7 on top of the powder 5a.
and the second powder 5b so as to cover the core tablet 7.
In a rotary dry-coated tablet machine that produces a dry-coated tablet 11 by compressing the powder with an upper punch 17 and a lower punch 3, the core tablet 7 is placed on top of the first powder 5a. An optical displacement sensor 20 is provided until the powder 5b of No. 2 is filled, and the optical displacement sensor 20 detects a change in height in the mortar hole of the mortar 2 due to placing the core lock 7. By doing so, a rotary tablet machine with a core is provided, which is characterized in that the presence or absence of a core tablet 7 is determined and non-core tablets are excluded.

In the above configuration, the optical displacement sensor 20
It is possible to detect a change in the height in the mortar hole by comparing the height of the powder 5a when there is no core tablet detected in advance with the height of the core tablet 7 placed on the powder 5a. can.

Furthermore, in the above configuration, the optical displacement sensor 2
0 is the height in the mortar hole by comparing the height of the powder 5a put into the mortar hole of the mortar 2 and the height of the core tablet 7 when the core tablet 7 is placed on the powder 5a. It is possible to detect changes in the

Furthermore, in the above configuration, the optical displacement sensor 2
0 detects a change in the height in the mortar hole by comparing the height of the powder 5a before the core tablet 7 is placed and the height of the powder 5a after the core tablet 7 is placed. Can be done.

(effect) The above technical means works as follows.

The core tablet 7 is supplied or placed on the mortar 2 containing the first powder 5a, and then the turntable 1 rotates to supply the second powder 5b.
At the position before b is supplied, the optical displacement sensor 20 detects a change in the height in the mortar hole of the mortar 2 due to placing the core lock 7, and if it has a predetermined height, If it is recognized as normal, and if there is no core tablet placed on it, it will be recognized as a non-core tablet because it does not have the specified height, and will be discharged as a defective product separately from the good core tablets. . Note that the optical displacement sensor 20 is synchronized with the rotating mortar 2,
The height (thickness) of the core tablet 7 is usually about 2 mm to 3 mm, and when the core tablet 7 is placed on the powder 5a, the height (thickness) of the core tablet 7 is always at the top surface height of the powder 5a. There is a difference in the height of the core tablet 7 protruding from the other side, or a difference in the height of the powder 5a due to the core tablet 7 being placed. The presence or absence of the core lock 7 is determined by instantaneously detecting the change in height in the mortar hole.

That is, the optical displacement sensor 20 detects that the powder 5a is put into the mortar hole of the mortar 2, and then the powder 5a
It is determined whether or not the core tablet 7 has been placed by detecting a change in volume in the mortar hole as a change in height due to the core tablet 7 being placed on top of the mortar hole.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 is a rotary disk on which a large number of dies 2 are arranged at equal intervals on the circumference.

6 is a core lock supply disk synchronized with the rotary disk 1 for dropping and supplying the core lock 7 into the hole of the mortar 2;
The core lock supply disk 6 holds in advance the core lock 7 sent from the feeder 12 through the feed pipe 13 in its hole, and detects that the core lock 7 is held. It is detected by the phototube 16, and if the core lock 7 is not held, the position of the mortar 2 that becomes the coreless lock is memorized by storing the signals from the timing phototube 15 and the timing hole 14. The coreless tablet is taken out into the coreless tablet chute 23 by the removal damper 18.

5a is the first powder put into the hole of the mortar 2, and the powder 5a falls from the powder outlet 19,
A fixed amount is fed into the mortar 2 by the first feeder 4 .

5b is a second powder that is filled by the second powder 8 after the first powder 5a enters the hole of the mortar 2 and then the core tablet 7 is supplied.

3 is the lower pestle, 17 is the upper pestle, 9 is the lower pestle 3 and the upper pestle 17
This is a compression roll for compressing from above and below.

Reference numeral 11 denotes a dry-coated tablet which is normally molded with a core tablet 7, and the dry-coated tablet 11 is taken out of the rotary disk 1 by a damper 10 and a chute 21 and falls into a receiving can 22.

20 is an optical displacement sensor (distance sensor) disposed at a position after the core tablet 7 is supplied until the second powder is filled, and the optical displacement sensor 20 is a red LED reflective sensor. A controller 20a has a built-in sensor unit 20b that transmits and receives a height signal using a light transmitting lens and a light receiving lens, and a control unit that amplifies and controls the signal.
It consists of

This optical displacement sensor 20 is normally connected to the rotary disk 1.
A first powder 5a is put into the hole of the mortar 2, and then a height signal is irradiated into the inside of the mortar 2 in which the core lock 7 is supplied or placed on the powder 5a by the core lock supply disc 6. By doing so, it is determined based on the height difference between the powder 5a and the core tablet 7, it is recognized that the core tablet 7 is supplied, and if the core tablet 7 is not placed, the height difference is determined. Since there is no difference in height, it is determined that the core lock 7 is not supplied, and the memory device 25 stores it.

This coreless lock is activated by the operation of the solenoid 24 connected to the storage device 25.
Activate the exclusion damper 18 and release the lockless lock shoot 2.
3, it is removed from the rotary disk 1.

(Effects of the Invention) As explained above, the present invention has an optical displacement sensor that directly detects the inside of the die after the feeding process in which the core lock is fed into the die of the rotary disk. It is possible to determine the presence or absence of a core tablet, and it can completely eliminate non-core tablets, so there is no need for any other device to separate non-core tablets from those with a core, and non-core tablets can be mixed in with core tablets. This has the effect of enabling quality control, which is important due to the nature of dry-coated tablets used for pharmaceuticals and the like.

[Brief explanation of drawings]

The drawings show a rotary dry-coated tablet machine according to the present invention, and FIG. 1 is a plan view, and FIG. 2 is a cross-sectional view illustrating the state inside the mortar when normally producing dry-coated tablets. , FIG. 3 is a sectional view illustrating the state inside the mortar when defective coreless tablets are manufactured. In the drawings, 1 is a rotary disk, 2 is a mortar, 3 is a lower punch, 4 is a first feeder, 5a and 5b are powders, and 6
1 is a core tablet supply disc, 7 is a core tablet, 8 is a second feed, 9 is a compression roll, 10 is a damper, 11 is a core tablet, 12 is a feeder, 13 is a feeding pipe, 1
4 is a timing hole, 15 is a timing photocell, 1
6 is a nuclear lock detection phototube, 17 is an upper punch, 18 is an exclusion damper, 19 is a powder dropper, 20 is an optical displacement sensor, 20a is a controller, 20b is a sensor unit, 21 is a chute, 22 is a receiving can, 23 is a 24 is a solenoid, and 25 is a storage device.

Claims (1)

[Claims] 1. Put the first powder 5a into the mortar hole of the mortar 2 disposed on the rotary disk 1, place the core tablet 7 on top of the powder 5a, and cover the core tablet 7. In a rotary dry-coated tablet machine that produces a dry-coated tablet 11 by compressing the second powder 5b using an upper punch 17 and a lower punch 3,
After placing the core tablet 7 on the first powder 5a, the second
An optical displacement sensor 20 is provided until the powder 5b is filled, and the optical displacement sensor 20 detects a change in height in the mortar hole of the mortar 2 due to placing the core lock 7. A rotary tablet machine with a core is characterized in that the presence or absence of a core tablet 7 is determined and non-core tablets are excluded. 2 The optical displacement sensor 20 determines the height in the mortar hole by comparing the height of the powder 5a when there is no core tablet detected in advance and the height of the core tablet 7 placed on the powder 5a. 2. The rotary dry-coated tablet machine according to claim 1, wherein the rotary tablet machine detects a change in the temperature. 3. The optical displacement sensor 20 compares the height of the powder 5a placed in the mortar hole of the mortar 2 with the height of the core lock 7 when the core lock 7 is placed on the powder 5a. 2. The rotary dry-coated tablet machine according to claim 1, wherein the rotary tablet machine detects a change in height in the die bore. 4 The optical displacement sensor 20 determines the height in the mortar hole by comparing the height of the powder 5a before the core tablet 7 is placed and the height of the powder 5a after the core tablet 7 is placed. The rotary dry-coated tablet machine according to claim 1, wherein the rotary tablet machine detects a change.