JPH046825Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention primarily relates to improvements in a sample crushing device used to crush samples of drugs and the like formed into tablets.

As shown in FIG. 1, this type of sample crushing device is equipped with a motor M.
A rotor b connected to a motor shaft m and rotating within the ring a shakes out the material while crushing it by centrifugal force, passes through the mesh of the ring a, and collects it in a container c surrounding the outer periphery of the ring a. As shown in Fig. 2, a rotary blade d that is connected to the motor shaft m of a motor M and rotates is arranged on the bottom of the inner cavity of a cylindrical container c. There is also a mixer type in which a sample placed in a container c is pulverized by rotating blades d.

However, in the former case, this conventional sample crushing device rotates the rotor b while putting the sample into the ring a made of a sieve screen and covering the open opening on the top side of the container c with a lid plate. In the latter case, the sample to be crushed is placed in the container c, and the rotary blade d is rotated while the open opening on the top side of the container c is covered with a lid plate. When the sample to be crushed is a tablet whose surface has been coated, such as a sugar-coated tablet, the surface side of the tablet may not be sufficiently crushed. , the powder concentrates and accumulates on the upper surface of the pulverized material, creating the problem that it is difficult to pulverize the entire product uniformly.

This is achieved by rotating the rotor b or the rotating blades d at a high speed of about 10,000 times per minute, causing the air in the ring a or container c to rise in the peripheral area and descend in the center, causing convection. As a result, the pulverized material flows along this flow, and as a result, the heavier particles of the pulverized material accumulate in the lower layer, and the lighter particles rise and collect in the upper layer. Then, the light film-like skin covering the surface of the tablet peels off like a shell.
This is due to the fact that it floats on top of the crushed material in that state.

The present invention was devised to solve this difficulty, and aims to provide a new means for homogeneously pulverizing a sample in a short period of time.

In the present invention, as a means to achieve this objective, a crushing blade that rotates at high speed is provided at the bottom of the inner cavity of a cylindrical container, and a drop lid is placed above the crushing blade. The present invention proposes a sample crushing device characterized in that the crushing blades are arranged so as to be movable up and down.

Next, an example of implementation will be described in detail with reference to the drawings.

FIG. 4 is a schematic perspective view of the entire sample crusher that can carry out the present invention. In the figure, 1 is a machine frame, 10 is a turntable provided on the machine frame 1, and 2... is a top of the turntable 10. A container 3 is placed on the turntable 10 and is inserted into the moving container 2, and is combined with the container 2 to form a crushing mechanism A.

The machine frame 1 is formed into a box-like shape that can be placed on a workbench or desk, and the turntable 10 is mounted on the front side of the top surface of the machine frame 1.
is assembled so as to be driven and rotated by a motor M1 installed in the machine frame 1, and a motor M2 installed in the machine frame 1 rotates in the forward and reverse directions at the intermediate portion between the left and right on the side closer to the rear. A screw rod 11 is mounted on a shaft so as to protrude from the top side of the machine frame 1 in an upright position, and openings 12a are provided on the top surface of the machine frame 1 at the left and right portions of the screw rod 11, respectively. ,1
A cleaning tank 12 and a drying tank 13 with opening 3a are installed. The screw rod 11 is screwed with the boss portion 41 of the rotary arm 4, which has three arms 40 radially protruding from each of support plates 4a and 4b arranged in upper and lower rows in parallel. It's hot,
When the screw rod 11 is rotated in the forward and reverse directions by the operation of the motor M2, the rotary arm 4 can move up and down within the range up to the height of the guide rod 14, which is provided to move up and down to a position parallel to the screw rod 11. conduct,
At a height position beyond the guide rod 14, it is configured to rotate following the rotational direction of the screw rod 11.

The crushing mechanism 3 includes a crushing blade 30 disposed near the lower end of a crushing chamber 2a formed at the bottom of the inner cavity of the container 2, and a drop lid movably disposed on the top surface of the crushing blade 30. 31 and more.

The crushing blade 30 has a rotating shaft 33 whose axial direction is the vertical direction attached to a lid member 32 that covers the opening 23 on the upper end side of the container 2 so as to be openable and closable.
The rotating shaft 3 is
The length of the downwardly hanging side of the lid member 32 of No. 3 is set to approximately correspond to the depth of the container 2, and the mounting plate 30a is assembled to the lower end member of the rotating shaft 33. By installing the crushing blades 30 on the 30a, when the lid member 32 is attached to the opening 23 of the container 2, as shown in FIG. It is arranged near the lower end of the chamber 2a.

Further, the drop lid 31 is attached to a guide rod 34 which is vertically installed on the lower surface of the lid member 32 at a position eccentric to the rotation shaft 33, and whose outer peripheral edge abuts against a step 22 provided on the inner surface of the peripheral wall 20 of the container 2. The inner cover 35 formed in the shape of a plug is inserted so as to be slidable up and down, and the center hole of the inner cover 35 is inserted into the aforementioned rotating shaft 33. , a guide tube 36 fitted into the outer periphery of the rotating shaft 33 in a sheath shape;
is attached so that its lower end side hangs downward, and by slidably fitting the hole provided in the center of the drop lid 31 into the guide tube 36, it is arranged to move freely up and down. It has been set up. By expanding the lower end of the guide tube 36 to a position immediately above the aforementioned crushing blades 30, this enlarged diameter portion acts as a stopper 37 to restrict the downward movement of the drop lid 31 to a position immediately above the crushing blades 30. It is designed to do so.

Further, a spring 38 is connected to the above-mentioned inner lid 35 to urge it to come into pressure contact with the step portion 22 formed on the inner peripheral surface of the peripheral wall 20 of the container 2.

The lid member 32 is supported by each arm 40 of the lower support plate 4b of the rotary arm 4 which is screwed into the screw rod 11 installed upright on the machine frame 1, and the upper surface side of the lid member 32 is The upper end of the rotary shaft 33 protrudes from the upper support plate 4 of the rotary arm 4.
Motor M3 mounted on the top surface of each arm 40 of a
It is connected to the rotating shaft of the motor via a coupling ring 39.

The embodiment device constructed in this manner operates as follows.

It is assumed that when the motor M2 is rotated and the screw rod 11 is rotated clockwise as shown in FIG. 4, it is a forward rotation. Assume that a groove is formed. Therefore, when the motor M2 rotates forward, the screw rod 1
When rotating arm 1 in that direction, rotating arm 4 becomes
While it collides with the guide rod 14 and prevents the follow-up rotation, it rises. This causes the crushing mechanism 3 to
When the screw rod 11 reaches a predetermined height position, the engagement pin 11a provided on the screw rod 11 abuts against the abutting portion 42 provided on the rotating arm 4, and the screw rod 11 and the rotating arm 4 becomes engaged in the rotational direction. At this time, the guide rod 14 is lowered by an appropriate means such as a solenoid. As a result, the rotating arm 4 rotates together with the screw rod 11, and the next arm 40
A crushing mechanism 3 supported by is located above the container 2. When the next arm 40 rotates to a predetermined position, a sensor 15 detects this rotation.
16 stops the rotation of motor M2.

Next, from this state, when the aforementioned guide rod 14 is raised and the motor M2 is rotated in the reverse direction, the rotating arm
The arm 4 descends, and the lid member 32 provided on the arm 40 of the support plate 4b below it comes into contact with the opening 23 of the container 2, resulting in the state shown in FIG. 5.

In this state, when the motor M is operated, the rotation of the rotating shaft 33 causes the crushing blades 30 to rotate at high speed, crushing the tablets T that have been placed in the container 2 in advance (Fig. 7). .

As a result, as the tablets T... are crushed, the large gaps that were initially formed between the particles of the tablets T... are destroyed, and the tablets T... that were piled up high as shown in Figure 5 are destroyed. As the mountain gradually becomes lower, the drop lid 31, which had been pushed up by the tablets T..., descends as shown in Fig. 8, and the crushing chamber 2a is lowered.
By narrowing the width of the crushing blade 30, the light substances that rise up without being sufficiently crushed are forced into the action range of the crushing blades 30.

Next, FIG. 9 shows another embodiment of the crushing device A.

This embodiment is similar to the inner lid 35 in the previous embodiment.
The inner lid 35, the spring 38 that urges it downward, and the peripheral wall 20 of the container 2 are omitted.
This embodiment is the same as the embodiment described above except that the stepped portion 22 formed on the inner circumferential surface of the embodiment is omitted, and the same constituent members are given the same reference numerals and detailed explanations will be omitted.

In this embodiment, there is no upper boundary of the crushing chamber 2a formed at the bottom of the container 2;
It works the same as the previous embodiment.

As explained above, the sample crushing device according to the present invention has a crushing blade that rotates at high speed disposed at the bottom of the inner cavity of a cylindrical container, and a drop lid is placed above the crushing blade. On the other hand, since the sample is arranged so that it can move up and down, when the sample is crushed and the gaps formed between them are destroyed, the overall volume decreases. The drop lid descends and compresses the volume of the grinding chamber downward, so when the sample is ground, the flow of air inside the grinding chamber causes light substances to fly up and cause unpulverized particles. The problem of long retention is effectively eliminated, and tablets can be crushed efficiently in a short period of time.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a conventional means, Fig. 2 is an explanatory diagram of another conventional means, Fig. 3 is a sectional view of the same part, and Fig. 4 is a schematic perspective view of the entire sample crushing device that can implement the present invention. Figure 5 is a vertical cross-sectional side view of the main parts of the above, Figure 6 is a cross-sectional plan view of the main parts of the above, Figures 7 and 8 are explanatory diagrams of the action of the above, and Figure 9 is another implementation. It is a vertical side view of the main part of an example. Explanation of drawing symbols, A... Sample crushing device, a...
Ring, b...rotor, c...container, d...rotating blade, 1...machine frame, 10...turntable,
11...screw rod, 11a...engaging pin, 12...
Cleaning tank, 12a, 13a...Opening port, 13...Drying tank, 14...Guide rod, 15, 16...Sensor, 2...Container, 2a...Crushing chamber, 20...Peripheral wall, 21...Bottom Wall, 22...Step, 23...Opening, 3...Crushing mechanism, 30...Crushing blade, 30a
... Mounting plate, 31 ... Drop lid, 32 ... Lid member,
33... Rotating shaft, 34... Guide rod, 35... Inner cover, 36... Guide tube, 37... Stopper, 3
8... Spring, 39... Coupling, 4... Rotating arm, 4a, 4b... Support plate, 40... Arm
41...Boss part, 42...Abutting part M, M1,
M2, M3, M4...motor, m...motor shaft, T...tablet.

Claims (1)

[Scope of utility model registration request] A crushing blade that rotates at high speed is disposed at the bottom of the inner cavity of the cylindrical container, and a drop lid is disposed above the crushing blade so as to be able to move up and down with respect to the crushing blade. Sample crushing device.