JP6920743B2 - Locking punch and locking machine and locking method using this - Google Patents

Description

The present invention relates to a lock punch for molding various tablets such as drugs, supplements, and foods, a lock machine using the same, and a lock method.

The tableting machine for molding tablets of chemicals and the like includes a molding machine in which tableting mills filled with raw material powder are arranged at regular intervals in the circumferential direction, and a molding machine in which the punching die is arranged above the molding machine and described in the circumferential direction. An upper punch holding plate that holds the upper punch corresponding to the tableting mortar, and a lower punch holding plate that is placed below the molding machine and holds the lower punch corresponding to the locking mortar in the circumferential direction. A pair of left and right lower pressing rollers, which are arranged below the lower punch holding plate and press-contact with the head striking surface of the lower punch to push the lower punch toward the molding plate, and press-contact with the head striking surface of the upper punch. It is provided with a pair of left and right upper pressing rollers that push the upper punch toward the molding machine side.

Japanese Unexamined Patent Publication No. 2008-284568

In the locking by the above-mentioned tableting machine, the lower pressing roller presses against the head striking surface of the lower punch to push up the lower punch, while the upper roller presses against the head striking surface of the upper punch to press the upper punch. By being pushed down, the tablet is formed in the tableting mill. At the time of such tableting, the rotational force of the upper pressing roller and the lower pressing roller is applied to the heads of the upper and lower punches. On the other hand, as described above, the upper pestle body and the lower pestle body integrated with the head are pushed up and down in the vertical direction in the upper pestle holding board and the lower pestle holding board. , Stress strain, etc. is likely to occur in each head and body of the upper and lower pestle due to the difference in the pressing operation direction described above, and as a result, deformation or breakage of the upper pestle and the lower pestle, metal fatigue, etc. Various adverse effects such as are likely to occur. Along with this, there is also a problem that the yield of locking is finally lowered due to poor locking and deterioration of locking accuracy.

In addition, in the case of locking machines for chemicals, the main focus has been on the design of the locking surface at the tips of the upper and lower locking punches in order to eliminate locking obstacles such as so-called capping, lamination, or binding. However, the fact is that sufficient technical measures have not been taken for the design of the locking punch body.

In addition, in the rotary type locking machine, a large number of the above-mentioned upper punch and lower punch held by the upper punch holding plate and the lower punch holding plate during locking are these. There is also a problem that a continuous collision sound is generated by contacting the guide portion and the like around the pestle, which becomes noise in the locking place and its surroundings.

An object of the present invention is to provide a lock punch and a lock machine and a lock method using the lock punch, which can solve the above-mentioned various problems at once.

According to the first aspect of the present invention, a molding portion having a locking surface is provided on the tip end side of a substantially cylindrical body portion, and a head having a striking surface is provided on the base end side of the body portion. It is a punch, and the head is formed separately from the body, and the head is rotatably attached to the body in the outer peripheral direction of the body, and is attached to the base end surface of the body. A fitting recess is formed, and a substantially columnar fitting protrusion to be fitted into the fitting recess is provided on the side surface of the body of the head, and the head can rotate around the fitting protrusion as a central axis. In addition, a body portion concave groove and a head concave groove facing each other are provided around the fitting convex portion and the fitting concave portion, and the fitting concave portion extends toward the tip end side of the body portion. This is a locking punch in which a sound absorbing space for filling a sound absorbing material is formed between the bottom of the fitting recess and the tip of the fitting convex.

The present invention according to claim 2 is a locking machine in which the locking punch according to claim 1 is attached as an upper punch and / or a lower punch.

As described above, the locking punch according to the present invention is provided with a molded portion having a locking surface on the tip end side of a substantially cylindrical body portion, and a head having a striking surface is provided on the base end side of the body portion. This is because the head is made of a separate body from the body, and the head is rotatably attached to the body in the outer peripheral direction of the body. When the pressing roller is pressed against the head of the punch, only the head is rotated by the rotational force when the pressing roller is pressed against the head of the punch. Since the rotational force of the pressing roller is not directly applied to the body portion of the punch, it is possible to effectively reduce the occurrence of stress strain and the like in the punch.

Therefore, various adverse effects such as deformation and breakage of the upper and lower punches, metal fatigue, etc. are eliminated, and along with this, there is no problem of a decrease in the yield of tableting due to poor tableting or a decrease in tableting accuracy. , Efficient locking is possible. Further, as described above, the maintenance of the locking machine can be significantly improved as compared with the conventional case by suppressing wear and deterioration when the locking punch of the present invention is used as the upper punch and the lower punch, respectively. Further, in the locking punch according to the present invention, even if the head to which the rollers of the locking machine are in pressure contact is worn or damaged due to long-term use, the body of the locking punch remains as it is, and the head is said. Since only the part can be replaced, the maintenance cost of the locking punch itself can be significantly reduced.

Further, one of the base end surface of the body portion and the side surface of the body portion of the head is provided with a fitting recess having a substantially circular cross section, and the other has a substantially cylindrical fitting convex that is fitted into the fitting recess. According to claim 2, the locking punch according to claim 2, wherein the portion is provided and the head is rotatable about the fitting convex portion as a central axis. It is possible to obtain a locking punch in which only the head according to the present invention is rotatable.

Further, the fitting recess is formed on the base end surface of the body portion, the fitting convex portion is formed on the side surface of the body portion of the head portion, and the fitting recess is extended toward the tip end side of the body portion, and the fitting portion is formed. According to the locking punch according to claim 3 of the present application in which a vacant space is formed between the bottom portion of the joint recess and the tip end portion of the fitting convex portion, the vacancy is extended in the body portion. The weight of the lock can be reduced, and the presence of the vacant space makes it possible to reduce the generation of noise during locking. Further, by filling the space formed in the body with a sound absorbing material such as various fibers or a porous body, it is possible to further reduce the noise.

According to the locking method according to claim 5 of the present application, the tablet is smoothly molded with high accuracy while rotating only the head of the upper punch and the outer punch for locking independently of the body. You can get a special effect that you can do it.

It is a front view of the locking punch which concerns on embodiment of this invention. It is a perspective view of the state in which the head of the lock punch according to the same embodiment is separated. It is a vertical cross-sectional view of the locking punch which concerns on the same embodiment, and shows the state which omitted the keyway and the like. It is a perspective view of the body part in the state which the head is removed in the locking punch which concerns on the same embodiment. It is a front view of the locking machine in which the locking punch according to the same embodiment is attached as the upper punch and the lower punch. It is an enlarged front view of the upper and lower punches in the lock machine of FIG. It is sectional drawing which shows the other embodiment of the locking punch which concerns on this invention.

Next, an embodiment of the present invention will be described with reference to the drawings, but the present invention is not limited to such an embodiment.

As shown in FIGS. 1 to 4, in the locking punch 1 according to the present embodiment, a molding portion 3 having a locking surface 4 is integrally provided on the tip end side of a substantially cylindrical body portion 2, and the body portion 2 is provided. A head portion 5 having a striking surface 6 is provided on the base end side of the above. The head 5 is formed separately from the body 2, and the head 5 is rotatably attached to the body 2 in the outer peripheral direction of the body 2.

More specifically, in the locking punch 1 according to the present embodiment, the fitting recess 7 having a circular cross section is formed on the base end surface 2a of the body portion 2, and the fitting recess 7 is formed on the body portion side surface 5a of the head portion 5. A columnar fitting convex portion 8 to be fitted into the concave portion 7 is provided, and the head portion 5 is rotatable around the fitting convex portion 8 as a central axis. The outer shape of the locking punch 1 of the present embodiment is the same as that of the existing one, and therefore, it can be attached to various existing locking machines.

Further, in the present embodiment, as a rotatable mounting means for the head 5, a body recessed groove 11 is formed on the inner peripheral surface 7b of the fitting recess 7 of the body 2, and the fitting convex of the head 5 is formed. A head concave groove 12 facing the body recessed groove 11 is also formed on the outer peripheral surface 8a of the portion 8, and further, the inner peripheral surface 7b of the fitting recess 7 in the body 2 communicates with the body recessed groove 11. A female screw hole 14 is formed, and the fitting protrusion 8 of the head 5 is fitted into the fitting recess 7 of the body 2 and is opposed to the concave groove 11 of the body and the concave groove 12 of the head. By inserting the set screw 15 from the female screw hole 14 and allowing the tip portion 15a of the set screw 15 to enter the opposed body portion concave groove 11 and the head concave groove 12, the set screw With 15 as an anchor, the head 5 is configured to rotate separately from the body 2.

Note that 13 in the figure shows a key groove formed on the surface of the body portion 2 as needed. Further, in the present embodiment, as described above, the molding portion 3 is integrally provided on the tip end side of the body portion 2, but the molding portion 3 is configured separately from the body portion 2 via various engaging means. In some cases, the molded portion 3 can be replaced with one having various structures.

Next, as shown in FIG. 5, a method of locking with the locking machine 51 in which the locking punch 1 according to the above-described embodiment is attached as the upper punch 1A and the lower punch 1B will be described. A molding machine 52 in which the tableting mills 53 filled with the raw material powder are arranged at regular intervals in the circumferential direction, and a molding machine 52 which is arranged above the molding machine 52 and corresponds to the tableting mill 53 in the circumferential direction. An upper punch holding plate 55 in which the punch 1A is held, and a lower punch holding plate 57 arranged below the molding machine 52 and in which the lower punch 1B is held corresponding to the tableting mortar 53 in the circumferential direction. A pair of left and right lower pressing rollers 58A and 58B are arranged below the lower punch holding plate 57 and are pressed against the head striking surface 6 of the lower punch 1B to push the lower punch 1B toward the molding plate 52 (in the direction of arrow UP). A pair of left and right upper pressing rollers 59A and 59B, etc. are provided so as to press the upper punch 1A against the head striking surface 6 of the upper punch 1A and push the upper punch 1A toward the molding machine 52 side (in the direction of arrow DP). The upper pressing roller 59A and the lower pressing roller 58A are so-called preload rollers, and the upper pressing roller 59B and the lower pressing roller 58B are so-called main pressure rollers.

Then, as shown in FIGS. 5 and 6, by rotating the upper pressing rollers 59A / 59B and the lower pressing rollers 58A / 58B in the direction of arrow E, the upper punch 1A and the lower punch 1B shift in the direction of arrow F. At the same time, tableting is sequentially performed in the tableting mill 53 of the molding machine 52.

At this time, the upper pressing rollers 59A / 59B and the lower pressing rollers 58A / 58B are pressed against the head striking surfaces 6 of the upper punch 1A and the lower punch 1B. Although each of the heads 5 of the above rotates, the head 5 has a separate structure from the body 2 of the upper punch 1A and the lower punch 1B, and each head 5 rotates separately from the body 2. The body 2 is moved, and the rotational forces of the upper pressing rollers 59A / 59B and the lower pressing rollers 58A / 58B do not directly act on the body 2 to be in a free state. The push-up and push-down strokes can be performed smoothly.

Further, as shown in FIG. 7, in the locking punch 21 as another embodiment according to the present invention, the fitting recess 7 is formed on the base end surface 2a of the body portion 2 and fitted, similarly to the locking punch 1. The joint convex portion 8 is formed on the side surface 5a of the body portion 2 of the head portion 5, but in the present embodiment, the fitting recess 7 is extended toward the tip end side of the body portion 2, and the fitting recess 7 is formed. A vacant space SP is formed between the bottom portion 7d of the above and the tip portion 8c of the fitting convex portion 8. Further, the vacant space SP may be filled with a sound absorbing material (not shown) such as various fibers or a porous body. In this case, not only the vacant space SP exists but also the sound absorbing material to the vacant space SP is absorbed. By filling the material, the generation of noise can be further effectively reduced.

In each of the above-described embodiments, the fitting recess 7 is formed on the base end surface 2a of the body portion 2 and the fitting protrusion 8 is provided on the body surface side surface 5a of the head portion 5, but the opposite is true. In some cases, the fitting recess 7 is provided on the side surface 5a of the body of the head 5, and the convex fitting 8 is formed on the base end surface 2a of the body 2.

According to the locking punch according to the present invention, stress strain and the like during use of the locking punch are reduced, smooth locking is possible, noise generation during locking is also reduced, and maintenance is also performed. Since it can be easily and cost-reduced, it can be expected to be widely used in various tableting fields such as supplements and confectionery as well as drugs.

1 Locking punch 2 Body 3 Molding part 4 Locking surface 5 Head 6 Hitting surface 7 Fitting concave part 8 Fitting convex part

Claims (2)

A locking punch in which a molded portion having a locking surface is provided on the tip end side of a substantially cylindrical body portion, and a head having a striking surface is provided on the base end side of the body portion, and the head is a body. It has a separate structure from the part, and the head is rotatably attached to the body in the outer peripheral direction of the body, and a fitting recess is formed on the base end surface of the body to form the head. of the barrel portion side face provided the approximately cylindrical fitting convex portion that is fitted into the fitting recess, it is freely head rotates about axis fitting convex portion, and the fitting projection A body portion concave groove and a head concave groove facing each other are provided around the fitting recess, and the fitting recess extends toward the tip end side of the body portion to form a bottom portion of the fitting recess. A locking punch in which a sound absorbing space for filling a sound absorbing material is formed between the fitting convex portion and the tip end portion. A locking machine in which the locking punch according to claim 1 is attached as an upper punch and / or a lower punch.

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