JP4602915B2 - Blade structure of dust drum - Google Patents

Description

  The present invention relates to an improvement in a blade structure of a dust drum for storing dust.

  For example, the blade structure of the dust drum for storing dust is one blade that is rotatable and spirally attached to the inner periphery of the drum body that stores dust inside, and is inserted into the drum body. One blade is attached to the outer periphery of the stationary inner cylinder in a spiral shape opposite to the one blade, and one blade is opposed to the other blade at a predetermined interval. According to this configuration, when the drum body is driven to rotate, the dust can be scraped up by the one blade and the dust can be conveyed to the back of the drum body.

  In addition, the other blades are immovable and serve to promptly guide the dust into the drum body so that the dust does not stay in the vicinity of the inlet in cooperation with the one blade (for example, patent Reference 1).

In the dust drum blade structure, when the dust has a certain thickness and rigidity, there is no particular inconvenience, and the dust is compressed and stored in the drum body by continuing to rotate the drum body. Is possible.
Japanese Utility Model Publication No. 56-92603 (from page 3, line 11 to page 6, line 6, Fig. 1)

  However, if the dust thrown into the drum body is relatively thin and flexible, such as cut pieces of paper or bark, the following problems will occur when the dust inside the drum body is increasingly compressed. Will be invited.

  Here, the dust is compressed to the back of the drum main body by the rotation of the drum main body. However, as shown in FIG. Along with this, the closest portions P and P ′ between the edge of one blade B1 and the edge B2 of the other blade gradually shift in the rotation direction, and the gap between the closest portions P and P ′ is one. The dust becomes narrower, and the dust is also compressed by the closest parts P and P ′.

  The thickness of one blade B1 and the other blade B2 is thin, and the dust is scraped up by one blade B1 and pushed out inward of the drum body as the drum body rotates. Since the dust is forcibly sent between the closest parts P and P ′, a very large compressive force acts on the dust stuck between the closest parts P and P ′. In the future, B1 and B2 will bite into the dust, and a large frictional force will be generated.

  Thus, the large frictional force generated between the closest parts P and P ′ and the dust and the biting phenomenon of the blades B1 and B2 into the dust due to the large compressive force between the closest parts P and P ′ In the worst case, the drum body is stopped and the dust storage operation cannot be continued.

  Therefore, the present invention was devised in order to improve the above-mentioned problems, and an object of the present invention is to provide a blade structure of a dust drum that enables a dust storage operation to be performed smoothly. .

In order to achieve the above-described object, the problem-solving means of the present invention includes a blade that is rotatable and is spirally attached to the inner periphery of a drum body that stores dust therein, and is inserted into the drum body. In a blade structure of a dust drum, which is attached to the outer periphery of a stationary inner cylinder in a spiral shape opposite to the one blade and has one blade and another blade facing each other at a predetermined interval, the one blade each of the outer peripheral edge portion of the inner peripheral edge portion and the other blade of only setting the guide member having a width longer than the thickness of the mating of the blade at least opposing, provided on one of the one blade and the other blade The guide member is a belt-like plate having an opposing surface that forms a substantially right angle or a right angle with respect to the opposing blade, and the guide member provided on the other of the one blade and the other blade is opposite. Wherein the that has a curved surface facing the other side of the blade.

  According to the present invention, at the closest part between one blade and the other blade, the edges of the thin blade are not opposed to each other, but the guide members having a width longer than the thickness of the blade are opposed to each other. Therefore, the compressive force acting on the dust is reduced, each blade does not bite into the dust at the closest part, and the friction force generated between the dust and each blade is also reduced. become.

  Accordingly, a large frictional force is not generated between the closest part and the dust, and the phenomenon that each blade bites into the dust due to a large compressive force between the closest parts is prevented, so that the drum body is rotated. In addition, the rotational resistance can be reduced, thereby avoiding a situation in which the drum body is stopped and the dust storage operation cannot be continued.

  The present invention will be described below based on the illustrated embodiment. FIG. 1 is a schematic side view of a dust drum in which the blade structure of the dust drum according to one embodiment is embodied. FIG. 2 is an exploded perspective view of the dust drum in which the blade structure of the dust drum according to the embodiment is embodied. FIG. 3 is a rear view of the dust drum in which the blade structure of the dust drum according to the embodiment is embodied. FIG. 4 is a perspective view of one blade and another blade in the embodiment. FIG. 5 is a cross-sectional view of the closest approach portion between one blade and another blade in the embodiment. FIG. 6 is a perspective view of one blade and another blade showing a state where dust is being conveyed into the drum body.

  The blade structure of the dust drum in one embodiment is embodied in the dust drum D. The dust drum D includes a cylindrical drum main body 1 and a drum main body 1 as shown in FIGS. A lid 2 that closes an opening at one end; two blades 10 that are spirally attached to the inner periphery of the drum body 1; an immovable inner cylinder 14 that is inserted into the drum body 1; and the inner cylinder 14, an inner cylinder blade 15 as another blade which is attached in a spiral shape opposite to the blade 10 as one blade and is opposed to the blade 10 at a predetermined interval, and an inner cylinder blade 15 of the blade 10 And a guide member 21 provided on the outer peripheral edge of the inner cylinder blade 15 facing the blade 10.

  The drum body 1 will be described in detail below. The drum body 1 has a cylindrical shape, and two spiral blades 10 are provided on the inner periphery thereof. Can be sent inward of the drum body 1 by the blades 10, and when the drum body 1 is rotated to the other side, the dust in the drum body 1 can be discharged from the drum body 1 by the blades 10. It can be done. The number of blades 10 may be changed according to the type of dust stored in the drum body 1.

  One end opening end of the drum main body 1 is closed by a lid 2, and an inlet 11 is provided in the lid 2 so that dust can be introduced into the drum main body 1 as shown in FIG. 3. A discharge port 12 is provided so that dust can be discharged by the rotation of the drum body 1.

  1 and 2, a hollow frustum-shaped inner cylinder 14 is erected on the inward side of the drum D of the lid C, and the blade is disposed on the outer periphery of the inner cylinder 14. An inner cylinder blade 15 is provided which is opposed to the blade 10 at a predetermined interval and is spirally wound in the direction opposite to the winding direction of the blade 10. In addition, a notch 14a is provided on the lower base end side of the inner cylinder 14, so that dust thrown from the inlet 12 can be put into the drum body 1 through the notch 14a.

  More specifically, the lid 2 is supported by an outer member (not shown) that rotatably supports a drum main body 1 that is separately provided on the outside, and is not moved relative to the rotating drum main body 1. The inner cylinder blade 15 is also immovable with respect to the blade 10 that rotates together with the drum body 1.

  The inner cylinder blade 15 can quickly feed the dust thrown above the inner cylinder 14 by the rotating blades 10 that are introduced from the insertion port 12 and into the drum body 1.

  Further, after the drum body 1 is filled with dust, when dust is thrown into the drum body 1, the blades 10 compress the dust and feed it into the drum body 1. The presence of the inner cylinder blade 15 and each blade 10 that scrapes up the dust thrown into the inlet 12 make a space for newly putting dust in the drum body 1 immediately below the inlet 12, and the dust is introduced into the inlet. The backflow to 12 is prevented.

  Therefore, the dust can be compressed and stored in the drum body 1 by the blades 10, the inner cylinder blade 15, and the lid 2.

  The other end of the drum main body 1 is connected to a drive source (not shown), and in the dust drum D, dust can be charged and discharged as described above. .

  Each blade 10 described above is provided with a guide member 20, and the inner cylinder blade 15 is also provided with a guide member 21.

  Hereinafter, the guide members 20 and 21 will be described in detail. As shown in FIGS. 4 and 5, the guide member 20 provided on each blade 10 is provided on the inner peripheral edge portion that is the inner periphery of each blade 10. It is formed in the shape of a cylindrical pipe having a width H longer than the wall thickness t of the inner cylinder blade 15 which is the opposite blade on the opposite side.

  Further, since the guide member 20 is formed in the shape of a cylindrical pipe as described above, the guide member 20 is provided with a saddle curved surface facing the inner cylinder blade 15 which is the opposing blade on the opposite side.

  On the other hand, as shown in FIG. 4 and FIG. 5, the guide member 21 provided on the inner cylinder blade 15 is provided on the outer peripheral edge which is the outer periphery of the inner cylinder blade 15, and each of the opposing blades which are opposed to each other. It is a belt-like plate having a width h longer than the thickness T of the blade 10.

  Further, the guide member 21 is attached to the outer peripheral edge portion of the inner cylindrical blade 15 so as to form a substantially right angle or a right angle with respect to the blades 10 which are the opposing counterpart blades. The facing surface 20 a facing the blade 10 is substantially perpendicular or perpendicular to each blade 10.

  The guide member 21 may be formed by bending the outer peripheral edge of the inner cylinder blade 15 toward the inside of the drum body 1, or the outer peripheral edge as a belt-like plate that is a separate member from the inner cylinder blade 15. It may be provided by being joined to the drum body 1 by welding or the like, and when separated, when the dust is transported inward of the drum body 1, the dust is inward of the drum body 1. It is desirable to attach the guide member 21 so as to be located inward of the drum body 1 from the inner cylinder blade 15 as much as possible so as not to hinder the movement.

  The guide members 20 and 21 may be provided in a region where the inner peripheral edge of each blade 10 and the outer peripheral edge of the inner cylinder blade 15 face each other, and the inner peripheral edge of each blade 10 and the inner cylinder blade. It is not necessary to extend and provide to the area | region which 15 outer periphery parts cannot oppose.

  The dust drum D embodying the present invention is configured as described above, and its operation will be described below.

  As described above, in the dust drum D, as shown in FIG. 6, the drum body 1 is thrown and rotated in the direction of the dashed line arrow in FIG. 6 so as to convey the dust to the inside of the drum body 1. When dust is thrown into the drum body 1 from the charging port 11 in the state of being in the state, the dust W that has fallen directly below the charging port 11 is moved upward of the drum body 1 by the blades 10 as indicated by solid arrows in FIG. And a part of the dust W spills on the surface of the inner cylinder blade 15 facing the inside of the drum and is guided by the inner cylinder blade 15 to be drum body 1. It is conveyed inward.

  Further, when the dust W is further stored in the drum main body 1 and is further thrown in, the dust W is compressed in the drum main body 1 as the drum main body 1 continues to rotate.

  Then, when this compression starts, the dust W thrown in from the loading port 11 is swollen up above the drum body 1 by the blade 10, and the inside of the drum body 1 is filled with the dust W already put in. Therefore, it is scraped up while being compressed by the blade 10 and conveyed to the inside of the drum body 1.

  That is, in the gap between the guide member 20 of each blade 10 and the closest approach portions A and A ′ of the guide member 21 of the inner cylinder blade 15 shown in FIG. W will be sent.

  However, as shown in FIG. 5, in the closest approach portions A and A ′ in the blade structure, the edges of the thin blade 10 and the inner cylinder blade 15 do not face each other, but the width of the guide member 20. Is a width H longer than the wall thickness t of the inner cylinder blade 15, and on the other hand, the width of the guide member 21 facing the guide member 20 is a width h longer than the wall thickness T of each blade 10. The acting compressive force is reduced, and the blades 10 and the inner cylinder blades 15 do not bite into the dust W at the closest parts A and A ′. The frictional force generated during the period is also reduced.

  Therefore, a large frictional force is not generated between the closest parts A and A ′ and the dust W, and each blade 10 and the inner cylinder to the dust W due to a large compressive force between the closest parts A and A ′. Since the biting phenomenon of the blade 15 is prevented, the rotational resistance can be reduced when the drum body 1 is rotated. As a result, the drum body 1 is stopped and the dust storage operation cannot be continued. The situation where it ends is avoided.

  Further, since the guide member 20 is a pipe and the guide member 21 is a belt-like plate, the blade 10 and the inner cylinder blade 15 are overcome from the outer side of the drum body 1 and between the closest portions A and A ′. It is possible to smooth the flow of dust that tries to move to the inside of the drum body 1 through the drum, and to further reduce the rotational resistance when the drum body 1 is rotated. And since it is possible to further reduce rotational resistance, it is possible to reliably prevent a situation such as interruption of dust storage work.

  In the above description, the guide member 20 is provided on each blade 10 and the guide member 21 is provided on the inner cylinder blade 15. However, the guide member 20 is provided on the inner cylinder blade 15 and the guide member 20 is provided on the other side. Alternatively, the guide member 21 may be omitted and the guide member 20 may be provided instead of the inner cylinder blade 15, and the guide member 20 may be eliminated and the guide member 21 instead. May be provided in each blade 10. Even if such a design change is made, the blade 10 and the inner cylinder blade 15 are overcome from the outer side of the drum body 1 and pass between the closest parts A and A ′ and move to the inner side of the drum body 1. The flow of the dust to be attempted can be made smooth, and the rotational resistance for rotating the drum body 1 can be further reduced. And since rotation resistance can be reduced further, the effect that it is possible to prevent reliably the situation of interruption of dust storage work is not lost.

  This is the end of the description of the embodiment of the present invention, but the scope of the present invention is of course not limited to the details shown or described.

It is the side schematic diagram of the dust drum which the blade structure of the dust drum in one embodiment was embodied. It is a disassembled perspective view of the dust drum which embodied the blade structure of the dust drum in one Embodiment. It is a back schematic diagram of the dust drum which embodied the blade structure of the dust drum in one embodiment. It is a perspective view of one blade and other blades in an embodiment. It is sectional drawing in the closest approach part of one braid | blade and other braid | blade in one Embodiment. It is a perspective view of one blade and other blades showing a state where dust is being conveyed into the drum body. It is a perspective view of one blade and other blades in a conventional dust drum blade structure.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drum main body 2 Lid | cover 10 Blade 11 which is one blade Input port 12 Discharge port 14 Inner cylinder 14a Notch 15 Inner cylinder blades 20 and 21 which are other blades Guide member A, A 'Guide member A closest part D Waste drum W Waste

Claims (1)

One blade that is rotatable and spirally attached to the inner periphery of the drum body that stores dust inside, and a spiral that is opposite to the one blade on the outer periphery of the stationary inner cylinder inserted into the drum body In a blade structure of a dust drum provided with one blade and another blade opposed to each other at a predetermined interval, each of the inner peripheral edge of one blade and the outer peripheral edge of another blade, only set the guide member having a width longer than the thickness of the mating of the blade at least opposing, substantially perpendicular or perpendicular to the mating of the blade guide member which faces provided on one of the one blade and the other blade A guide plate provided on one of the blades and the other of the other blades is provided with a curved surface facing the opposing blade. Blade structure of the waste drums to be.

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