JPH0444319Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention is a rotary powder compression molding machine that compresses powder filled in a mortar hole with an upper punch and a lower punch to produce tablets of pharmaceuticals, etc. The present invention relates to an upper punch oil supply device.

[Prior Art] Generally, in order to compression mold powder filled into a mortar hole, an upper punch is placed on a rotary disk, with its head guided by an upper punch guide rail. The sliding part of the upper punch, which moves up and down in the punch holding hole, and where the upper punch and lower punch guide rail and the upper punch and upper punch holding hole can come into contact, always ensures that the upper punch moves smoothly. In order to operate properly, it is necessary to lubricate it with oil or the like.

In addition, when compressing powder into tablets, which are molded products, in order to improve the agglomeration of the powder,
It is common to mix glue materials such as starch paste and gum arabic into powders as fixatives, and recently,
There is a need to increase the production volume by increasing the rotation speed of powder compression molding machines. Reliable lubrication of the sliding parts of the upper punch is necessary.

Therefore, it is known to continuously contact an oil piece having lubricating oil retained in felt or the like with the sliding portion of the upper punch, which is the portion where the upper punch can come into contact with the upper punch guide rail and the upper punch holding hole (disclosed in Japanese Utility Model Application Laid-Open No. 61-182699).

However, continuous oil supply causes problems such as excessive oil supply and oil pieces that continue to come into contact with each other and are quickly damaged.

Therefore, conventionally, the technology disclosed in Utility Model Application No. 61-107498 has been adopted, which replenishes oil by intermittently contacting the upper punch with oil pieces depending on the amount of oil required by the upper punch. be.

That is, by attaching an oil piece to an arm or the like so that it can rotate or swing freely, and by directly moving the arm using a drive device such as an air cylinder, the oil piece can be moved intermittently as needed. It supplies oil by contacting the pestle.

[Problems to be solved by the invention] Appropriate lubrication can be achieved with such conventional technology, but due to the structure of intermittent movement, the equipment is complex and assembly and adjustment are not easy. There were problems such as difficulty in implementation with existing equipment.

Further, in the conventional type described above, since the oil supply portion simply makes sliding contact with the upper punch, there is also a problem that the sliding contact portion is easily worn out.

Furthermore, in this type of rotary powder compression molding machine, fallen parts and the like may fall onto the rotary disk and rotate together with the upper punch. If such an unexpected situation occurs, the fallen parts or the like may become caught between the upper punch and the oil supply section, and unreasonable force may be applied to the oil supply section. In other words, when such a situation occurs, the oil supply section is forcibly urged in the rotational direction by the rotational force of the rotary disk, and the urging force is directly transmitted to the drive section, causing the drive section to malfunction. The parts holding the oil supply part may become deformed or the upper punch may be damaged.

The present invention has been developed in view of the problems of the prior art, and its purpose is to improve the intermittent means for lubricating the upper punch, and to replace existing molding machines and lubricating devices. It is easy to manufacture and assemble and adjust for any type of rotary powder compression molding machine, such as a molding machine with little installation space or a molding machine with limited drive device installation space.Moreover, it is effective in reducing wear on the oil supply part. We have developed an upper punch lubrication device that can effectively prevent parts that have fallen onto the rotary disk from getting caught between the upper punch and the oil supply section and damage the drive section and other parts. This is what we are trying to provide.

[Means for Solving the Problems] In order to achieve the above object, the upper punch lubricating device of the rotary powder compression molding machine in the present invention is inserted into the upper punch holding hole provided on the rotary disk, and the upper punch lubricating device of the present invention attached to a rotary powder compression molding machine having an upper punch that moves up and down by being guided by an upper punch guide rail,
The oil supply part is intermittently brought into contact with the upper punch which rotates with the rotary disk, and the rotary end is pivoted toward the rotary disk, and the rotary end is retracted and rotated at least in the direction of rotation of the rotary disk. It includes a movable rotating arm, and an oil supply part that is rotatably pivotally attached to the rotating end of the rotating arm and comes into rolling contact with an upper punch that rotates together with a rotary disk. A cable inserted through a flexible tube connects this oil supply section and a drive section that moves the oil supply section.

In the above configuration, the oil supply section can automatically replenish lubricating oil as appropriate using the replenishment device.

[Function] The flexible tube guides the cable freely, so it can be used to guide the cable in a straight line, curve, detour, etc.
The cable placement position and distance can be freely selected.

The cable slides inside the flexible tube by the operation of a drive section such as an air cylinder, and the oil supply section attached to one end of the cable is therefore interlocked with the operation of the drive section.

Further, since the oil supply portion contacts the upper punch while rotating, it is possible to eliminate the problem of premature wear of the sliding portion.

Furthermore, this oil supply section is pivoted to the rotating end of a rotation arm that can be retracted in the direction of rotation of the rotary disk, and the oil supply section and drive section are connected to a deformable tube inserted into a flexible tube. Connected by cable. Therefore, if a fallen part that falls onto the rotating disk and rotates with the upper punch tries to get caught between the upper punch and the oil supply part, the rotating arm will be pressed and the rotating disk will rotate. This will result in an evacuation operation in the direction. In other words, by making it possible to transmit the driving force of the drive section to the oil supply section using a deformable cable inserted through a flexible tube, when the drive section is stopped at the refueling position, the rotation direction of the rotary disk can be transmitted to the oil supply section. When an unreasonable external force is applied, the cable and flexible tube deform to allow the oil supply section to retreat. Specifically, when an unexpected external force acts on the oil supply section, the cable and flexible tube, for example, the portion near the tip, etc., may be temporarily elastically deformed and the rotating arm may be rotated and retreated in an emergency evacuation manner. It becomes possible to design it as follows. Therefore, it is possible to significantly reduce the possibility that excessive reverse driving force will be transmitted to the drive unit, causing failure of the drive unit or deformation of other components holding the oil supply unit. can.

[Example] Examples will be described with reference to the drawings.

1 is a rotary disk in which a large number of upper punch holding holes 2 are arranged;
3 is an upper punch which is slidably inserted into the upper punch holding hole 2.

The upper punch 3 moves up and down as its head 4 is guided by an upper punch guide rail (not shown).

Reference numeral 5 denotes an oil supply section made of an annular felt that comes into contact with the head 4 of the upper punch 3.
It is rotatably attached to 0. That is, as clearly shown in FIG. 1, the rotating arm 10 is pivoted to the mounting arm 11 with the rotating end 10a facing the rotating disk 1. It is designed so that it can be retracted and rotated in the direction of rotation. The rotating end 1 of this rotating arm 10
The oil supply section 5 is rotatably attached to the shaft 0a.

Reference numeral 6 denotes an air cylinder 1 disposed on a stand frame 12 attached to the main body of a molding machine (not shown).
This is a drive unit consisting of 6 components.

7 is a flexible tube made of a spiral metal pipe coated with synthetic resin; 8 is a wire-like cable inserted and guided through the flexible tube 7; one end of the cable 8 is attached to the rotating arm 10 with a cable set screw 14, and the other end is attached to the air cylinder 16 via a connection adjuster 17.

The air cylinder is operated intermittently, and may be operated at predetermined time intervals or at predetermined rotational speeds of the rotary disk 1, for example.

Reference numeral 9 denotes a replenishment device that appropriately replenishes lubricating oil to the oil supply section 5, and the replenishment device 9 is operated by a pump (not shown) every time the rotary arm 10 rotates a predetermined number of times or at a predetermined time. The lubricating oil in the oil tank is refilled through the oil pipe 13.

According to this embodiment, the position where the oil supply part 5 rolls into contact with the upper punch 3 due to the operation of the air cylinder 16 (see the solid line in FIG. 1) and the position where it separates from the upper punch 3 (as shown by the imaginary line in FIG. However, for example, if a fallen part or the like rotates together with the rotary disk 1 while the oil supply part 5 is held in a position in contact with the upper punch 3, the oil supply part 5. It is pressed by the fallen part and moves in the direction of rotation of the rotary disk 1. That is, for example, when a fallen part that is caught between the upper punch 3 and the upper punch 3 and cannot be removed collides with the oil supply part 5, this oil supply part 5
is pressed by the rotational force of As a result, the portions of the cable 8 and flexible tube 7 mainly near their tips, that is, the portions of the cable 8 and flexible tube 7 closer to the oil supply section 5 than the fixing fittings 18, are elastically deformed mainly by buckling. The portion 5 and the rotating arm 10 perform a temporary retraction operation in the right direction in FIG. Therefore, it is possible to effectively prevent excessive force from acting on each part.

The present invention is not limited to the above embodiment, and for example, the oil supply part may be any material capable of retaining oil, such as cloth or sponge, and the oil supply location may be the vertical sliding part of the upper punch. Also, the rotating arm may be resiliently held in the state shown in Fig. 1, and the cable may be simply pulled when the oil supply part is released from contact with the upper punch. Furthermore, a tension spring may be interposed between the rotating arm and the cable, or between the cable and the drive part, and used to adjust the amount of movement of the oil supply part.

Further, a cleaning device may be added that wipes the upper punch immediately before the oil supply portion comes into contact with the upper punch.

[Effects of the invention] Since the present invention is configured as described above, it produces the effects described below.

The connection between the oil supply section and the drive section is flexible, and the position of the drive section or the type of drive source can be arbitrarily determined.

In other words, the location of the drive unit relative to the oil supply unit can be freely determined by simply selecting the length of the cable, so it is possible to place the space-consuming drive unit in an unnecessary location away from the oil supply unit, or to remove the drive unit from the oil supply unit. The drive source can be arbitrarily selected, such as by freely relocating only the drive section, or by using other power, such as the rotational force of a rotary disk, as the drive source for the drive section.

In addition, there is no need to accurately determine the relative positional relationship between the oil supply section and the drive section, which simplifies manufacturing and assembly, and the amount of movement can be adjusted by adjusting the play in the cable, making implementation and management easier. It has the effect of becoming.

Further, according to the present invention, it is possible to eliminate the problem of premature wear of the oil supply portion, and it is possible to improve durability.

Furthermore, according to the present invention, when an unreasonable external force is applied to the oil supply section due to interference with a falling part held on a rotary disk and rotated, the deformation of the cable and flexible tube is used to apply the force. The refueling section can be temporarily evacuated. Therefore, it is possible to effectively prevent unreasonable force from acting on the drive unit or the like, resulting in failure or deformation of parts. Therefore,
Another advantage is that it can be used safely for a long period of time.

In addition, as for the thing of Claim 2, it is possible to prevent excessive or insufficient replenishment of lubricating oil, and more precise and stable lubricating can be performed.

[Brief explanation of the drawing]

FIG. 1 is a plan view of essential parts showing an embodiment of the present invention;
FIG. 2 is a sectional view of the main part taken along line A-A in FIG. 1. 1...Rotary disk, 2...Upper punch holding hole, 3...Upper punch, 4...Head, 5...Oil supply section, 6...Drive section,
7...Flexible tube, 8...Cable, 9...Supply device, 10...Rotating arm, 10a...Rotating end, 1
1...Mounting arm, 12...Stand frame,
13...Oil pipe, 14...Cable set screw, 1
6...Air cylinder, 17...Connection adjustment tool.

Claims (1)

[Claims for Utility Model Registration] 1. A rotary machine having an upper punch 3 that is inserted into an upper punch holding hole 2 provided in a rotary disk 1 and whose head 4 moves up and down as it is guided by an upper punch guide rail. This is an upper rod lubricating device that is attached to a type powder compression molding machine and makes a lubricating part 5 intermittently come into contact with an upper punch 3 that rotates together with the rotary disk 1. A rotary arm 10 which is attached to the rotary arm 10 and whose rotary end 10a can be retracted and rotated at least in the direction of rotation of the rotary disk 1; The oil supply part 5 is provided with an oil supply part 5 that comes into contact with the upper punch 3, and this oil supply part 5
An upper punch oil supply device for a rotary powder compression molding machine, characterized in that a cable 8 inserted through a flexible tube 7 connects the drive unit 6 that moves the oil supply unit 5. 2. Claim 1, wherein the oil supply unit 5 is automatically replenished with lubricating oil as appropriate by a replenishment device 9.
The upper punch oil supply device of the rotary powder compression molding machine described above.