JPS6219279B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for feeding articles into a mortar of a rotary powder compaction machine for compacting powder.

A conventional device of this kind is known in the form of a cored tablet press, the main part of which is shown in FIG. In the figure, a indicates a mortar arranged at equal intervals on the same circumference on the rotary disk of a powder molding machine (not shown), and b indicates a supply table that is continuously rotated in synchronization with the rotary disk. It has a plurality of storage grooves d for curved core locks c. e is a fixed guide provided along the periphery of supply table b, f is a movement trajectory centered on the mortar hole, and g
is the locus of movement of the storage groove d.

This conventional device has a configuration in which the respective movement trajectories f and g overlap at only one point, and just before this overlapping point, the holding of the core lock c by the fixed guide e is released, and the core lock c is pressed at the overlapping point of the trajectories. It is designed so that it falls into the container a by its own weight and is supplied.

However, in this conventional device, since the movement trajectories f and g overlap at only one point, it is not only difficult to supply the core lock c at an accurate position with respect to the mortar a, but also it is often impossible to supply the core lock c. It was hot. This problem tended to be more pronounced as the rotary disk rotated at higher speeds.

The present invention was made under the above circumstances,
A first object of the present invention is to provide an article feeding device for a rotary powder molding machine that can accurately feed objects to a mortar of a rotary disk that is continuously rotated. In addition to the object of the first invention, the object of the second invention is to ensure the reliability of supply of the material to be fed, and to move the material in the mortar from its fixed position if necessary. An object of the present invention is to provide an article feeding device for a rotary powder molding machine that can feed objects in such a way as to prevent such problems.

An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

In the figure, reference numeral 1 denotes a rotary disk of a rotary powder molding machine, and dies 2 are arranged at equal intervals on the same circumference.
Reference numeral 3 denotes an article feeding device to be described later, which in this embodiment is adapted to feed, for example, core tablets A into the mortar 2.
Powder feeders 4 and 5 are disposed before and after the article supply position, respectively, with their lower surfaces in sliding contact with the rotary disk 1.
The powder feeder 4 on the front side supplies a fixed amount of powder for the lower layer into the mortar 2, and the powder feeder 5 on the rear side covers the core tablet A in the mortar 2 and supplies a fixed amount of powder for the upper layer. It is provided for. An upper punch 6 and a lower punch 7 are attached to the rotary disk 1 so as to be slidable in the vertical direction so as to face the mortar 2, respectively, and the punches 6 and 7 are pressed by a pressure roller 8 in a direction in which they approach each other. Then, the powder in the mortar 2 is compressed to obtain a molded product, such as a dry-coated tablet. Further, reference numeral 9 in FIG. 1 is a scraper provided close to the top surface of the rotary disk 1, and is used to scrape off molded products from the top of the rotary disk 1.

The article supply device 3 includes a supply table 10, a plurality of suction arms 11, an engaging portion 12, a power transmission mechanism 13, an article supply table 14, guides 15, 1
6, a pressing body 17, a cam 18, and the like.

In other words, the supply table 10 has a fixed support shaft 1
9 is rotatably supported via a bearing 20,
A plurality of guide members 2 are provided on the outer peripheral surface of the table 10.
1 is provided. The supply table 10 has a plurality of guide holes 22 along the radial direction, and these holes 22 communicate with a negative pressure passage 23 provided in the support shaft 19. The negative pressure passage 23 is connected to a vacuum suction mechanism (not shown). In addition, 24 in FIG. 2 is an airtight ring.

The suction arm 11 is installed so that it can reciprocate along the radial direction of the supply table 10 by inserting its sliding cylinder portion 11a into the guide hole 22, and
Each is constantly biased outward by a spring 25. Note that each arm 11 is guided by the guide member 21, the guide hole 22, and a stopper rod 26 protruding from the table 10. Stop Parrod 2
6 is used to restrict the protruding position of the suction arm 11. The interior of each suction arm 11 is hollow and communicates with a negative pressure passage 23 via a guide hole 22 . For example, a single suction hole 27 is formed on the lower surface of the tip of the suction arm 11, respectively. This hole 27 is formed to have a diameter slightly larger than the outer diameter of the core tablet A. Moreover, suction arm 1
1 has a pressing body 17 facing the suction hole 27 at the tip thereof.
are installed respectively. The pressing body 17 passes through the upper wall of the tip end of the suction arm 11 and is constantly urged upward by a spring 29. Note that 30 is a stopper attached to the pressing body 17, and the lower end of the pressing body 28 is formed into a concave spherical shape, for example, in accordance with the shape of the core tablet A.

The engaging portions 12 are provided on each suction arm 11, respectively. These engaging portions 12 are connected to the rotary disk 1.
It is adapted to be engaged with and disengaged from the same number of guides 15 as the mortars 2 included therein, and the same number of guides 16 as the article storage sections (described later) included in the article supply table 14. Note that in this embodiment, the guide 15 of the rotary disk 1
This shows the case where the upper pestle 6 is used. A slide bearing 31 is attached to each engaging portion 12, and the stopper rod 26 passes through this bearing 31.
The spring 25 is wound around each of the springs 25 and 25, respectively.

The power transmission mechanism 13 is a transmission system that uses the rotary disk 1 as a drive source to rotate the supply table 10 in synchronization with the rotary disk 1, and in the case of this embodiment, a gear 32 formed on the rotary disk 1 and a gear 32 formed on the rotary disk 1. A gear 3 meshed with the supply table 11 and connected to the supply table 11
It is formed from 3.

The article replenishment table 14 is rotatable, arranged in parallel to the supply table 10, and rotated synchronously with the rotary disk 1 or the supply table 10 as a driving source. In this embodiment, the gear 34 connected to the article supply table 14, the gear 33,
A case is shown in which the table 14 is rotated synchronously with the supply table 10 by another power transmission mechanism 35 consisting of an intermediate gear connecting these. A plurality of article storage sections 37 are formed at equal intervals on the periphery of the transfer plate 36 included in the table 14 .
The article storage section 37 is formed by a groove or a hole. A floor plate 38 is disposed close to the lower surface of the periphery of the transfer plate 36 over at least the transport area of the core tablet A to prevent the core tablet A from falling out of the article storage section 37. In addition, the goods supply table 1
4 is provided with a guide 16 above the transfer plate 36. The guides 16 are installed in the same number and at the same pitch as the article storage sections 37. Also, the first
In the figure, numeral 39 is a vibrating parts feeder, which supplies the core lock A to the article storage section 37 from above through a conduit 40.

Further, the cam 18 is arranged and fixed at the article supply position of the rotary powder molding machine, facing the upper surface of the rotary disk 1. The upper end of the pressing body 28 is adapted to slide on the lower surface of the cam 18.

In addition, in Fig. 1, B is the movement trajectory of the center of the mortar 2, and C is the movement trajectory of the center of the mortar 2.
is the movement locus of the center of the suction hole 27, D is the movement locus of the center of the article replenishing section 37, and movement loci B and C are
Comrades and comrades C and D are provided in an intersecting relationship when viewed two-dimensionally. Also, E and F are trajectories B and C
The intersection points G and H of the trajectories C and D are the intersection points of the trajectories C and D.

Next, the operation of the above embodiment will be explained.

When the rotary disk 1 is rotated, the supply table 10 is synchronously rotated in the opposite direction to the rotation of the rotary disk 1 via the power transmission mechanism 13, and the power transmission mechanism 3
5, the article supply table 14 is synchronously rotated in the opposite direction to the rotation of the supply table 10. In other words, the relationship between the rotary disk 1 and the supply table 10 is such that when the mortar 2 reaches the intersection E of the trajectories B and C, the suction hole 27 of the suction arm 11 is exactly facing the upper surface of the mortar 2. are rotated with respect to each other. Furthermore, in the relationship between the supply table 10 and the article replenishment table 14, when the suction hole 27 reaches the intersection G of the respective trajectories C and D, the article storage section 37 is exactly opposite to the lower surface of the suction hole 27. are rotated with respect to each other.

Incidentally, when the suction hole 27 reaches the intersection G, the engaging portion 12 engages with the guide 16, and this engaged state continues until the suction hole 27 reaches the intersection H. Therefore, during the period from the intersection G to H, after the suction arm 11 is pushed by the guide 16 against the spring 25 and moved in the centripetal direction of the supply table 10,
The supply table 10 is pushed back in the counter-centripetal direction by the biasing force of the spring 25 to perform a reciprocating motion. As a result, the movement trajectory C of the suction hole 27 between the intersections G and H overlaps the movement trajectory D of the article storage section 37. Of course, in this case, the relative speed between the suction hole 27 and the article storage section 37 is zero. At the same time, when the suction hole 27 reaches the intersection E, the engaging portion 1
2 is engaged with the upper punch 6 serving as the guide 15, and this engaged state is continued until the above-mentioned intersection F is removed. Therefore, even during the period from intersection E to F, after the suction arm 12 is pushed by the upper punch 6 against the spring 25 and moved in the centripetal direction of the supply table 10,
The biasing force of the spring 25 causes a reciprocating movement in which the supply table 10 is pushed back in the opposite direction, so that the movement trajectory C of the suction hole 27 between the intersections E and F is changed to the movement trajectory B of the mortar 2. overlap. Of course, in this case, the relative speed between the mortar 2 and the suction hole 27 is zero.

On the other hand, the core lock A has already been supplied to the article storage section 37 from the vibrating parts feeder 39, and the interior of the suction arm 11 is communicated with the negative pressure passage 23 and is under negative pressure. Therefore, the core tablet A in the article storage section 37 is vacuum-adsorbed into the suction hole 27 within the long overlapping section between the intersections G and H in the trajectories C and D. By this suction, the core lock A is stored in the suction hole 27 so as not to touch the top surface of the transfer plate 36, but the position of the core lock A at this time is restricted by the pressing member 1.
7. The core tablets A transferred from the article supply table 14 to the supply table 10 in this manner are supplied into the mortar 2 within the long overlapping section between the intersections E and F on the trajectories B and C.

That is, since the pressing body 17 comes into sliding contact with the lower surface of the cam 18 between the intersections E and F, the pressing body 17 is pushed down against the biasing force of the spring 29. As a result, the pressing body 17 presses down the core lock A, and this core lock A
is separated from the suction arm 11 and fed into the mortar 2. Of course, when the pressing body 17 comes off the cam 18, it is pushed up by the force of the spring 29.

By repeating the above operations, the core locks A can be successively supplied to fixed positions of the mortar 2 on the rotary disk 1 which is continuously rotating.

Although the above-described embodiment is configured as described above, in the present invention, the guides 15 may be provided on the rotary disk 1 at equal intervals in addition to the upper punch 6. Further, in the first invention, the pressing body 17, the cam 18, etc. may be omitted, and in this case, the communication between the inside of the suction arm 11 and the negative pressure passage 23 is cut off at the overlapping section between the intersections E and F. At the same time, the interior of the suction arm 11 may be configured to communicate with the atmosphere. Furthermore, in the second aspect of the invention, the cam 18 and the like may be set as necessary so that the pressing stroke of the pressing body 17 becomes longer, and the object to be supplied, such as a core tablet, may be pushed into the mortar 2. In this case, not only the separation of the material to be supplied from the suction arm 11, that is, the supply to the mortar becomes more reliable, but also the material to be supplied is immersed in a fixed position against the powder layer in the mortar. Therefore, it is possible to effectively prevent the object to be supplied from being inadvertently moved from its fixed position due to vibrations applied during conveyance by the rotary disk 1 after being supplied. Moreover, when the pressing body 17 is used in the present invention, the through hole into which the lower end of the pressing body 17 protrudes and the suction hole may be provided separately and close to each other. Moreover, the supplied material is not limited to nuclear tablets. In addition, when carrying out the present invention, specific details such as the supply table, suction arm, article supply table, each power transmission mechanism, each guide, engaging portion, pressing body, cam, etc. shall be made unless it contradicts the gist of the invention. Of course, the shape, structure, position, material, etc. are not limited to the one embodiment described above, and can be configured and implemented in various ways.

The gist of each of the inventions described above is the structure described in the claims above. Therefore, the first and second
According to each of the above inventions, a plurality of reciprocating suction arms that are always urged outward are attached to a supply table that rotates in synchronization with a rotary disk, and an engaging portion provided on the arm is attached to a supply table that rotates in synchronization with a rotary disk. A portion of the movement locus of the suction part of the suction arm can be changed by engaging and disengaging the disc and the guides provided on the rotary disc or the article supply table that rotates in synchronization with the supply table.
The locus of movement of the mortar of the turntable and the locus of movement of the article storage section of the supply table can be overlapped with each other. In other words, each trajectory overlaps not only at one point as in the conventional case, but also over a fairly long arc-shaped range, and in this state, the objects to be supplied from the article storage section to the fixed position of the suction arm, and Since the auxiliary materials can be supplied from the rotor to the fixed positions of the mortar, it is possible to accurately supply the materials even when the rotational speed is low as well as high speed. Furthermore, the second invention has a structure in which the suction arm is provided with a pressing body that is pressed down by sliding contact with the cam, and the object to be supplied is forcibly separated from the suction arm. There is no separation failure from the suction arm, and there is an effect that the reliability of supply of the supplied material to the mortar can be guaranteed. During this forcible separation, for example, it becomes possible to forcefully push the material into the powder layer in the mortar, if necessary, and in this case, it is possible to prevent the material in the mortar from moving from its fixed position.

[Brief explanation of the drawing]

1 to 3 show an embodiment of the present invention,
Figure 1 is a plan view showing the overall outline, and Figure 2 is a plan view showing the overall outline.
FIG. 3 is a schematic sectional view taken along the line ``--'' in the figure, and FIG. 3 is an enlarged sectional view of the suction arm section. FIG. 4 is a schematic diagram showing a conventional article supply section. 1... Turntable, 2... Mortar, 3... Goods supply device, 10
... Supply table, 11 ... Suction arm, 12 ... Engagement part, 13 ... Power transmission mechanism, 14 ... Article supply table, 15, 16 ... Guide, 17 ... Pressing body, 18
...Cam, 23...Negative pressure passage, 25...Spring, 27...Adsorption hole, 29...Spring, 35...Power transmission mechanism, 36...
Transfer board, 37...article storage section, A...material to be supplied (core lock).

Claims (1)

[Claims] 1. A plurality of suction arms are attached to a rotatable supply table so as to be able to reciprocate along the radial direction and always urged outward, and a plurality of suction arms are attached to a rotatable supply table at equal intervals on the same circumference. A rotary disk of a rotary powder molding machine equipped with a mortar and the supply table are connected through a power transmission mechanism, and a rotatable article supply table is connected to the supply table or the rotary disk through the power transmission mechanism. Each of the suction arms is provided with an engaging portion that engages and disengages the same number of guides as the mortar provided on the rotary disk and the same number of guides as the article storage portions provided on the article supply table. Article feeding device for rotary powder molding machine. 2 A rotary system in which multiple suction arms are attached to a rotatable supply table so that they can reciprocate along the radial direction and are always biased outward, and multiple dies are arranged at equal intervals on the same circumference. The rotary disk of the type powder molding machine and the supply table are connected via a power transmission mechanism, and the rotatable article supply table is connected to the supply table or the rotary disk via the power transmission mechanism, and each of the suction The arm is provided with an engaging portion that engages and disengages the same number of guides as the mortar of the rotary disk and the same number of guides as the article storage portions of the article replenishment table, and each suction arm has an upper wall at its tip. A rotary powder molding device, characterized in that a pressing body that penetrates through and is always urged upward is attached to each of the rotary powder molding machines, and a cam with which the upper end of the pressing body slides is arranged at the article supply position of the rotary powder molding machine. Machine goods feeding device.