JP4833308B2 - Scraping device in packaging machine - Google Patents

Description

  The present invention relates to a scraping device in a packaging machine, and more particularly to an improvement in a mounting structure between a split rotor and a drive shaft of the split rotor.

Conventionally, for the packaging of powders to be dispensed in hospitals, etc., it has a turntable having an annular groove for depositing powder on the upper surface of the outer periphery, and in a state where this turntable is rotated, from the powder feeder Dispersing and supplying powder to the annular groove of the turntable, dividing the powder in the annular groove by a scraping device and scraping it out to supply it to the packaging device, and packaging the powder in the packaging device A packaging machine (hereinafter also simply referred to as a packaging machine) is provided.
The scraping device scrapes out a target amount of powder from the annular groove by a divided rotor, and supplies powder for each package to the packaging device. The split rotor is disposed between the rotating plate that contacts the annular groove, the partition plate that is spaced apart from the rotating plate at a predetermined interval, and a portion that contacts the annular groove, and the rotating plate and the partition plate. It consists of a scraping nail that scrapes off.
After the powder supply is distributed to the annular groove, when the scraping device scrapes the powder, the turntable is intermittently operated and the divided rotor is intermittently rotated from the inner peripheral side to the outer peripheral side of the turntable. With this intermittent rotation, the powder is scraped out by the scraping nail, whereby the powder is supplied to the packaging device one by one.

  In this type of apparatus, a conventional split rotor mounting structure is known as in Patent Document 1. The scraping device for a packaging machine described in Patent Document 1 has a configuration in which the driving force of a motor for driving a divided rotor is transmitted to a driven pulley directly connected to the divided rotor via a transmission belt. A positioning member is screwed to the driven pulley, and a rotating plate and a scraping plate in which the partition plate and the scraping claw are integrated are fixed to the positioning member by a fixing knob. The fixing knob has a threaded portion and is attached and detached using a dedicated tool.

JP 2005-350146 A

By the way, in the scraping device in the conventional packaging machine, in order to position the rotating plate and the scraping plate with respect to the driven pulley, the positioning pin formed on the positioning member, and the rotating plate and the scraping plate are formed. Positioning holes are used. This configuration has a problem that the number of parts is increased, for example, a positioning pin is required separately.
In addition, since the scraping claw is integrated with the partition plate and the fixing part, it is not possible to replace only the scraping claw, and there is a problem that it is more expensive to replace the most frequently scraping claw. It was.
Furthermore, since the plate thickness of the positioning member to which the screw portion of the fixing knob is screwed is thin, there is a problem that the number of the female screw threads is reduced and the fixing cannot be surely performed.

The scraping device of the present invention includes a drive shaft that is rotationally driven and a divided rotor that is fixed to the drive shaft, and the divided rotor includes a rotating plate and a scraping claw that is fixed to the rotating disk. A partition plate that is opposed to the rotating disc with the scraping nail interposed therebetween, and is fixed to the scraping nail, and rotates the split rotor together with the drive shaft, A scraping device in a packaging machine that scrapes a powder placed on a turntable and distributes the powder to a packaging device in a fixed amount, wherein the split rotor includes an engaged surface into which the drive shaft is inserted. holes are formed on the outer periphery of said drive shaft, said engaged with the engagement surface, engagement surface for restricting the relative rotation of these drive shafts and dividing the rotor are formed, the partition plate Is fixed to the mounting member, and the scraping claw is detachable from the mounting member. The hole has a first hole provided in the rotating plate and a second hole provided in the mounting member, and the drive shaft is provided with the first and second holes. 2 having a position restricting surface for restricting the insertion depth and a female screw hole formed in the tip end surface of the rotary plate and the mounting member. The male screw is clamped between the male screw and the position restricting surface .

  It is preferable that a holding disc having an annular holding wall portion that is in contact with and holds the rotating plate on the outer peripheral portion thereof is fixed to the drive shaft.

According to the present invention, the split rotor is formed with a hole having an engaged surface into which the drive shaft is inserted, and the drive shaft is engaged with the engaged surface, and the drive shaft and the divided rotor are connected to each other. Since the engagement surface that restricts relative rotation is formed, the number of parts is reduced, the attachment becomes easy, and an attachment error can be prevented.
Since the scraping claw is detachably fixed to the mounting member, only the scraping claw can be replaced.
Since the female screw hole is provided on the tip end surface of the drive shaft and the rotating plate and the attachment member are screwed together by the male screw, the female screw hole becomes deeper and more rigid fixing is possible.
Since the drive shaft has a structure in which a holding disc having an annular holding wall portion that contacts and holds the rotating plate on the outer peripheral portion thereof is fixed, the fixing of the rotating plate is more stable, and the divided rotor There is an effect that the rotation of is stabilized.

It is a division figure of the scraping device concerning the present invention. It is detail drawing of the state which combined the partition part and scraping nail of the scraping device which concerns on this invention, (a) is a front view of a scraping nail, (b) is a side view of a scraping nail. It is a perspective view of the assembly state of the scraping device which concerns on this invention. It is the schematic of a packaging machine provided with the scraping apparatus which concerns on this invention.

Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 4 is a schematic view of a packaging machine provided with the scraping device of the present invention.
As shown in FIG. 4, the packaging machine 1 of this embodiment includes a vibration feeder 2 that supplies powder P discharged from a powder cassette (not shown), a turntable 3 that receives powder P falling from the vibration feeder 2, and a turn In conjunction with the rotation of the table 3, the scraping device 10 that quantitatively scrapes the powder P supplied to the turntable 3 outward, and the packaging device 4 that packages the powder P scraped by the scraping device 10. It is the composition provided with.

  The turntable 3 has a disk shape in plan view, is rotatably supported around an axis in the vertical direction, and has an annular groove 5 having an arcuate cross section for receiving the powder P falling from the vibration feeder 2 on the upper surface of the outer peripheral portion thereof. It is configured. The turntable 3 is rotationally driven by a drive mechanism 6.

  The vibration feeder 2 drops the powder P onto the annular groove 5 of the rotating turntable 3, and is fixed to the main body of the packaging machine 1 and disposed on the upper part of the annular groove 5.

The scraping device 10 includes a divided rotor 11, an arm 15, a drive motor 12, and the like.
The split rotor 11 is attached to the distal end side of the arm 15 extending inward and outward of the diameter of the turntable 3 so as to be rotationally driven around the tangential axis of the turntable 3. The arm 15 is rotatably supported by an arm support shaft 14 having a tangential axis of the turntable 3 on the base end side.
A drive motor 12 is disposed behind the arm 15, and the rotational force of the drive motor 12 is transmitted to the arm support shaft 14 via the gear train 13, and further, a pulley provided in the arm 15, and transmission It is transmitted to the drive shaft 20 of the split rotor via a drive force transmission mechanism such as a belt, and the split rotor 11 is rotationally driven by this rotational drive force.

FIG. 1 is an exploded view of a divided rotor 11, a drive shaft 20, a holding disk 30 attached to the drive shaft and supporting the divided rotor 11, and a divided rotor fixing screw 80 that constitute the scraping device 10 of the present invention.
The divided rotor 11 includes a rotating plate 40, a partition 60, and a scraping claw 50, and is screwed to the drive shaft 20 by a divided rotor fixing screw 80.
The drive shaft 20 is attached to a pulley (not shown) to which the rotational driving force of the drive motor 12 shown in FIG. 4 is transmitted, and a holding disk 30 is screwed to the tip side.
The holding disc 30 includes a disc portion 31 and a holding wall portion 32. The holding wall portion 32 is formed at the outer edge portion of the disc portion 31 and supports a rotating plate 40 described later. A fixing hole 33 is formed at a predetermined position of the disc portion 31 for allowing a fixed countersunk screw 34 used for fixing to the drive shaft 20 to pass therethrough.

Two engaging surfaces 21 are formed at the tip of the drive shaft 20 by chamfering a part of the outer periphery of the shaft. I am doing. Hereinafter, this shape is referred to as a shaft tip cross section.
The engagement surface 21 is formed over a predetermined distance from the tip of the drive shaft 20. With this engagement surface 21, a position regulating surface 22 having a surface perpendicular to the axial direction of the drive shaft 20 is formed at the end of the engagement surface 21.
Further, a female screw hole 23 in which a split rotor fixing screw 80 for fixing the split rotor 11 is screwed is formed at the tip of the drive shaft 20.
The holding disc 30 and the drive shaft 20 are fixed by screwing a fixed countersunk screw 34 into a screw hole formed in a flange portion (not shown) formed in the drive shaft 20.

The rotating plate 40 is a circular plate-like member, and is formed so that the curvature of the outer peripheral portion corresponds to the curvature of the annular groove 5 of the turntable 3 shown in FIG. In the center of the rotating plate 40, a rotating plate hole 41 having a shape that engages with the shaft tip section is formed. Of the end surface of the rotating plate hole 41, the first engaged surface 44 that forms two flat portions contacts the engaging surface 21 of the drive shaft 20. A silicon rubber 42 is attached to the peripheral edge of the rotating plate 40. An escape hole 43 for avoiding contact with a rivet rod 75 described later is formed in a predetermined portion of the rotating plate 40.

The partition portion 60 includes a partition plate 61 and an attachment member 63.
The partition plate 61 is a plate-like member, and a part of the outer edge portion is formed to correspond to the curvature of the annular groove 5 like the outer edge portion of the rotating plate 40. Further, the partition plate 61 is formed with a square hole 62 that engages with a convex portion 51 of a scraping claw 50 described later.
The mounting member 63 includes a plate portion 64 that is fixed perpendicularly to the partition plate 61, a shaft attachment portion 65 that is connected to one end portion of the plate portion 64, and is positioned parallel to the partition plate 61, and these plate portions. 64 and a connecting portion 66 that connects the shaft mounting portion 65. The mounting member 63 is a member for positioning the relative position of the drive shaft 20 and the partition plate 61, and the distance between the arc portion of the partition plate 61 and the axis of the drive shaft 20 is the outer periphery of the rotating plate 40. The partition plate 61 is positioned so as to be equal to the distance between the portion and the drive shaft 20.

A U-shaped U-shaped groove 68 is formed in the plate portion 64, and a cylindrical head protrusion 52 of a scraping claw 50 described later is inserted into the U-shaped groove 68. The U-shaped groove 68 has a counterbore surface 69 having a so-called counterbore shape.
The shaft mounting portion 65 is formed with a partition hole 67 having a shape that engages with the above-described shaft tip section. A second engaged surface 72 that forms two flat portions is formed in the partition portion hole 67, and the second engaged surface 72 contacts the engaging surface 21 of the drive shaft 20.
The partition plate 61 and the attachment member 63 are coupled by two round bar-like rivet bars 75. The rivet rod 75 is passed through a first rivet hole 70 formed in the short direction of the plate portion 64 and a second rivet hole 71 formed in the partition plate 61. By crushing, the partition plate 61 and the attachment member 63 are rivet-coupled.

The scraping claw 50 is a belt-like plate body, and a convex portion 51 that engages with the square hole 62 of the partition plate 61 is formed on the side portion. A cylindrical head protrusion 52 that engages with the U-shaped groove 68 of the attachment member 63 of the partition 60 is provided at one end of the scraping claw 50. A blade 53 made of silicon rubber is attached to the other end of the scraping claw 50, and the tip of the blade 53 is formed in a sharp shape.

  The split rotor fixing screw 80 is a screw having a head portion 81 having a knurling process or the like processed on its side surface, and may be generally available. The head 81 has a knurled portion, so that the user can tighten the divided rotor fixing screw 80 by hand. The head 81 is formed with a slot and can be tightened with a flathead screwdriver.

  Next, a method for assembling the scraping device 10 having the above-described configuration will be described.

First, the cylindrical head protrusion 52 of the scraping claw 50 is engaged with the U-shaped groove 68 of the mounting member 63, and the convex portion 51 of the scraping claw 50 is engaged with the square hole 62 of the partition plate 61. The scraping claw 50 and the partition 60 are combined.
2A and 2B are detailed views showing a state in which the partition portion 60 and the scraping claw 50 are combined.
Next, the rotation plate hole 41 of the rotation plate 40 is engaged with the drive shaft 20, and then the partition portion hole 67 of the partition portion 60 is engaged with the drive shaft 20. At this time, the circumferential position of the rotating plate 40 and the circumferential position of the partition portion 60 are positioned by aligning the shaft tip section of the drive shaft 20 with the rotating plate hole 41 and the partition portion hole 67.
Finally, the screw portion of the divided rotor fixing screw 80 is screwed into the female screw hole 23 of the drive shaft 20, and the head 81 of the divided rotor fixing screw 80 is rotated by hand, whereby the rotary plate 40 is moved with respect to the drive shaft 20. And the partition part 60 and the scraping nail | claw 50 combined with this partition part 60 are fixed, and are integrated as shown in FIG.

  Next, the operation of the scraping device 10 having the above configuration will be described.

  First, in a state where the powder P is distributed and supplied to the annular groove 5 of the turntable 3, the divided rotor 11 is rotated, and the arm 15 is lowered so that the divided rotor 11 contacts the annular groove 5. When the divided rotor 11 comes into contact with the annular groove 5, the scraping claw 50 scrapes out the powder P, and the powder P is sent to the packaging device 4. When the powder P is scraped, the left and right ends of the scraping claw 50 are covered with the rotating plate 40 and the partition plate 61, so that a certain amount of the powder P is scraped.

According to the scraping device 10 of the embodiment of the present invention described above, the rotating plate hole 41 into which the drive shaft 20 is inserted and the partition portion hole 67 are formed in the mounting member 63 of the rotating plate 40 and the partition portion 60 to drive Since the shaft 20 is configured to engage the rotating plate hole 41 and the partition hole 67 and restrict the relative rotation between the drive shaft 20 and the divided rotor 11, the number of parts is reduced and mounting is easy. It becomes.
Since the scraping claw 50 is detachably fixed to the attachment member 63, only the scraping claw 50 can be replaced.
Since the female screw hole 23 is provided on the tip surface of the drive shaft 20 and the rotating plate 40 and the mounting member 63 are screwed together by the split rotor fixing screw 80, the female screw hole 23 can be formed deeper. Strong fixation is possible.
Since the holding disc 30 provided with the annular holding wall portion 32 that contacts and holds the rotating plate 40 on the outer peripheral portion thereof is fixed to the drive shaft 20, the rotating plate 40 is more fixed. There is an effect that the rotation of the divided rotor 11 is stabilized.
When fixing the split rotor 11 to the drive shaft 20, the split rotor fixing screw 80 with a knurled or other step formed on the head 81 is used, so that no special tools are required for assembly and fixing by hand. It becomes possible to do.

Note that the silicon rubber used for the peripheral portion of the rotating plate 40 and the blade 53 is adopted from the viewpoint of the scattering prevention effect and the buffering property with respect to the contacting member, and is limited to this as long as the same effect can be expected. It is not a thing.

DESCRIPTION OF SYMBOLS 1 ... Packaging machine, 2 ... Vibration feeder, 3 ... Turntable, 4 ... Packaging apparatus, 5 ... Annular groove, 6 ... Drive mechanism, 10 ... Scraping device, 11 ... Dividing rotor, 12 ... Drive motor, 13 ... Gear train , 15 ... arm, 20 ... drive shaft, 21 ... engagement surface, 22 ... position regulating surface , 23 ... female screw hole, 30 ... holding disk, 31 ... disk part, 32 ... holding wall part, 33 ... fixing hole, 34 ... Fixed countersunk screw, 40 ... Rotating plate, 41 ... Rotating plate hole, 42 ... Silicon rubber, 43 ... Escape hole, 44 ... First engaged surface, 50 ... Scraping claw, 51 ... Projection, 52 ... Circle Stigma projection, 53 ... blade, 60 ... partitioning part, 61 ... partition plate, 62 ... square hole, 63 ... attachment member, 64 ... plate part, 65 ... shaft attachment part, 66 ... connecting part, 67 ... partitioning part hole, 68 ... U-shaped groove, 69 ... Counterbore surface, 70 ... First rivet hole, 71 ... Second rivet hole, 72 ... Second engaged surface, 5 ... rivet rod, 80 ... split rotor fixing screws, 81 ... head.

Claims (2)

A rotationally driven drive shaft;
A split rotor fixed to the drive shaft,
The split rotor includes a rotating plate, a scraping claw fixed to the rotary plate, is counter arranged between the rotary plate is sandwiched in該掻Totsume, and a partition plate which is fixed to該掻Totsume Prepared,
A scraping device in a packaging machine that rotates the split rotor together with the drive shaft, scrapes the powder placed on the turntable by the scraping claws, and distributes the powder to the packaging device quantitatively,
The split rotor is formed with a hole having an engaged surface into which the drive shaft is inserted,
On the outer periphery of the drive shaft , an engagement surface that engages with the engaged surface and restricts relative rotation between the drive shaft and the divided rotor is formed .
The partition plate is fixed to an attachment member, and the scraping claw is detachably fixed to the attachment member,
The hole has a first hole provided in the rotating plate and a second hole provided in the mounting member;
The drive shaft has a position restricting surface that restricts the insertion depth in a state of being inserted into the first and second holes, and a female screw hole formed in the tip surface thereof,
The scraping device, wherein the rotating plate and the mounting member are sandwiched between the male screw and the position regulating surface by screwing a male screw into the female screw hole . The scraping according to claim 1 , wherein a holding disk having an annular holding wall portion that is in contact with and holds the rotating plate is fixed to the outer periphery of the drive shaft. apparatus.

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