JPH0451168B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Industrial Application Field The present invention comprises a centrifugal separation cylinder which has a cutter for cutting material on the inner bottom and is rotated by a motor, and a centrifugal separation cylinder which is attached to the inner periphery of the separation cylinder and which cuts the material. The present invention relates to a juicer that is equipped with a cylindrical filter that separates the collected material into waste and liquid, and that collects the waste in a centrifugal separation cylinder.

(b) Prior Art This type of juicer is known, for example, from Japanese Utility Model Publication No. 10504/1983. The filter used in this juicer is formed into a comb-like shape to form a large number of vertical liquid outflow slits, and debris adheres to and accumulates on the inner peripheral surface. In order to remove this adhered debris, the filter is elastically deformed, and the change in the spacing between the slits due to this deformation is relatively large at the lower end, but becomes smaller as it goes upward. Therefore, it is difficult to remove the scum, and the scum cannot be removed by simply washing with water, and the scum must be scraped off using a brush or the like, making it difficult to remove the scum. This difficulty in removing debris has been the main reason for hesitation in using Jusa itself.

(c) Object of the Invention In view of the above-mentioned drawbacks, it is an object of the present invention to provide an easy-to-use juicer by making it easier to remove debris and to make it easier to attach a filter.

(d) Structure of the Invention The structure of the present invention consists of a centrifugal separation tube that has a cutter on the inner bottom for cutting the material and is rotationally driven by a motor, and a centrifugal separation tube that is detachably attached to the inner circumference of the separation tube and holds the cut material. A juicer that is equipped with a cylindrical filter that separates waste and liquid, and that collects the waste in the centrifugal separation cylinder, wherein the cylindrical filter has a helical body having a spiral liquid flow gap that allows the interval to be expanded. and changing the cross-sectional shape of the final stage of the spiral to form the upper and lower end surfaces of the spiral into substantially flat surfaces,
It is characterized in that the inner bottom surface of the centrifugal separation tube, which the lower end surface of the spiral body comes into contact with, is formed into a substantially flat surface.

Due to this structure, waste adheres to and accumulates on the inner circumference of the filter, but by expanding and contracting the filter in the direction of the cylinder axis or deforming it in a direction perpendicular to the cylinder axis, the interval of the liquid flow gap changes greatly, so that the waste adheres to and accumulates on the inner circumference of the filter. If the filter is washed with the filter easily separated from the filter and the gap is widened, the debris stuck in the gap can be easily washed away. Furthermore, since the upper and lower end surfaces of the filter are formed as flat surfaces, the cylindrical filter can be mounted in the separating cylinder without any consideration of the mounting position in the rotational direction.

(E) Embodiment An embodiment of the present invention will be described below with reference to the drawings. First, referring to FIG. 1, what is shown in the drawing is a waste accumulation type pumper that can also function as a mixer by connecting a mixer attachment (not shown), and has a main body that includes a built-in electric motor (not shown), etc. A, a liquid generation section B having a centrifugal separation cylinder 29, etc., and a liquid extraction section C that receives and takes out the liquid generated in this generation section B.
It mainly consists of. The configuration of each part will be explained in detail below.

() About main body part A Referring to Fig. 2, 2 is a main body case which has a planar rectangular shape with four corners cut out, has elastic legs 3 at the four corners of the lower surface, and has an electric motor suspended and supported by a support plate 4. ,
A drive shaft 6 of an electric motor rotatably supported by a bearing 5 projects upward from an opening 7 on the upper surface of the case. This case 2 has a high step part 8 and a low step part 9 on the upper surface. A high-speed drive connector 10 is fixed to the upper end of the drive shaft 6, and is detachably connected to a connector (none of which is shown) provided on the lower surface of the mixer attachment. Reference numeral 11 denotes a low-speed drive connector that rotates at a low speed on its outer periphery in a biaxial manner concentric with the high-speed drive connector 10. The connector 11 is rotatably supported by the drive shaft 6 through a bearing 12, and includes pulleys 13, 14, and a belt 1.
The rotation of the drive shaft 6 is decelerated and transmitted via a deceleration mechanism 17 such as 5 or 16.

This connector 11 has a large diameter part 11a formed in the upper part, engagement grooves 18 formed in the outer periphery of the large diameter part 11a, and a drain plate 19 attached to the lower end. Reference numeral 20 denotes a motor control operation section provided on the front surface of the main body case 2.

() Regarding the liquid generation section B First, referring to FIG. 2, 21 is a rectangular planar shape with four corners cut out to match the main body case 2, and is composed of a receiver 21a with an opening on the top surface and a container lid 21b that covers the top opening. In this container, the receiver 21a is connected to the fitting parts 22, 2 formed in the high step part 8 on the upper surface of the main case 2.
3 and is placed in a detachable manner, and has an opening 24 on the lower surface through which the connectors 10 and 11 are inserted, and a liquid outlet 25 is formed at a position facing the lower step 9 on the lower surface. There is. This outlet 25 has a container 2.
Valve body 28 that is opened and closed by knob 27 of 1a
It is equipped with

Referring to FIG. 4, 29 has a spiral filter 3 on the inner circumference.
0 is detachably attached to the centrifugal separation tube, which is detachably connected to the above-mentioned low-speed connector 11 and driven to rotate, and includes a base part 29a with a cutter 38 for cutting material fixed to the upper surface, and a base part 29a that can be attached and detached to this base part 29a. A substantially cylindrical tube portion 29b with a bottom, a base portion 29a, and a tube portion 29b.
and a ring body 29c for coupling with.

Each part will be explained in detail below. The platform part 29a is made of synthetic resin and consists of a horizontal part 31 and a cylindrical support part 32 that protrudes downward from the horizontal part 31. The protrusions 33 formed on the inner periphery of the lower part of the support part 32 are connected to the low-speed connector 11. are removably engaged with the grooves 18 on the outer periphery of the connector 11 , and the lower end portion 34 is fitted below the groove of the connector 11 to be removably connected to the low-speed connector 11 . Further, a plurality of temporary fixing protrusions 35 and a plurality of engagement protrusions 36 are formed on the outer periphery of the lower part of the support portion 32, and rotation preventing protrusions 37 are formed on the outer periphery of the upper end.

The cutter 38 is attached to the horizontal part 31 by screws or rivets, and forms cutting blades 39 radially from the center as cutting blades, and also performs re-cutting to finely re-cut the remaining material by cutting back on the periphery. A plurality of blades 40 are formed.

The cylindrical portion 29b is made of synthetic resin and has a cylindrical shape with an opening at the top and a bottom as shown in FIG. This is a low stage section 52 for storage. The high step part 46 has an outer periphery 46a formed in a tapered shape that expands downward in order to facilitate the separation of debris accumulated on the low step part 52, and the support part 32 of the platform part 29a is fitted into the center part. A cylindrical fitting part 47 is formed, and the outer periphery of the upper end 32a of the support part 32 is brought into surface contact with the inner circumferential surface 47a of the upper end of the fitting part 47, and the horizontal part 3
1 to the upper surface 46a of the high step portion 46.
is in face contact with the This two-face contact between the horizontal and vertical surfaces reliably prevents wobbling between the base portion 29a and the cylindrical portion 29b, and improves the support strength.
48 is an engagement groove formed on the upper inner periphery of the fitting portion 47, into which the protrusions 37 of the base portion 29a are fitted to prevent the rotation of the base portion 29a and the cylindrical portion 29b. 4
9... are locking claws formed discretely on the inner periphery of the lower end of the fitting part 47;
When fitted onto the holder 7, it is elastically deformed and engages over the protrusions 35, thereby temporarily fixing the two 29a and 29b.

In this temporarily fixed state, the ring body 29c is fitted around the outer periphery of the support part 32 of the base part 29a, and the cylindrical part 29b is held between the ring body 29c and the horizontal part 31,
This ensures the connection between both 29a and 29b.

Referring to FIG. 4, the ring body 29c is
Protrusions 51 having slopes that bayonetly engage with the protrusions 36 of 9a are formed on the inner periphery, and the fitting portion 4
7. A receiving surface 53 for receiving the lower end is formed at the upper end.
Note that the support portion 32 and the ring body 29c may be connected by a threaded groove (not shown) instead of bayonet engagement.

Reference numeral 56 denotes the inner circumferential surface of the cylindrical portion 29b to which the filter 30 is attached, and has a tapered shape with a larger diameter at the top so that the separated liquid can easily rise. Forming a protrusion 57...
A liquid flow gap 58 is provided between the filter 30 and the outer circumferential surface of the filter 30.

59 is a filter locking protrusion formed at the lower end corner of the inner circumferential surface 56 to prevent rotation of the filter 30, and is formed on an extension of the protrusion, but is not limited to this. .

Note that the liquid flow gap 58 may be provided by forming a protrusion (not shown) on the outer circumference of the filter 30 instead of forming a protrusion on the inner circumferential surface 56.

Reference numeral 60 denotes a large-diameter portion formed at the upper end of the inner circumferential surface 56, on which projections 62 for locking a lid 61, which will be described later, are integrally protruded inward.

63 is approximately L across the side and bottom surfaces of the cylindrical portion 29b.
With a fluid balancer formed in a letter shape, the side surfaces of the cylindrical portion 29b are formed into double walls 64 and 65 with an opening at the bottom, and
This lower opening is closed with a ring-shaped bottom cover 66 to form a sealed space, and an appropriate number of vertical resistance plates 67 are integrally provided in this space projecting from the outer wall 65 side, and a balancer is installed in this space. A suitable amount of liquid 68 is enclosed. The bottom cover 66 has a concave-convex fit between the lower end of the outer wall 65 and an inner end of the lower surface of the bottom step portion 52, and is welded and sealed, and this concave-convex fit improves sealing performance. The outer wall 65 has a tapered shape with a diameter increasing at the bottom to make the lower part of the sealed space wider than the upper part, thereby concentrating the liquid 68 downward and preventing the liquid from rising upward.

As shown in FIGS. 7 to 10, the spiral filter 30 is composed of a multi-stage cylindrical spiral body 30A made of synthetic resin, for example, ABS resin, and a spiral liquid flow gap 69 is formed between each stage. It has spring properties. This spiral body 30A is formed by a mold so that the gap 69 is expanded as shown in FIG. 7 when no force is applied in the direction of contraction in the direction of the cylinder axis (natural extension state).
1 In the closed state, it is compressed and the gap 69 is in the most contracted state, and if a force is applied in the direction of extension in the cylinder axis direction from the state shown in the figure, the gap 69 is further expanded, and a force is applied in the horizontal direction. When this is done, a lateral shift occurs between the stages, which also has the property of widening the interval of the gap 69 in the left-right direction. This spiral 30A
The length in the cylindrical axial direction is longer than the depth l1 of the cylindrical portion 29b even when the lid 61 is in the closed state and in the naturally extended state, making it easy to take out the filter 30.

Further, the final stage 30a, 30 of the spiral filter 30
b is configured so that the end surfaces 70, 70 are flat surfaces with no steps (excluding protrusions 82, which will be described later), so that a large gap is not formed between the lower surface of the lid 61 and the inner bottom surface of the cylindrical portion 29b. This prevents waste from flowing out. To change the height dimension of the cross section mentioned above, you can glue separate ring-shaped bodies for height adjustment to the top and bottom surfaces of the spiral body with the same cross-sectional shape, or change the cross-sectional shape with a mold. However, in this embodiment, the latter is adopted. and end portion 71,
71 is sufficiently thick in the axial direction of the cylinder to ensure strength at the ends, and protruding pieces 72 are provided at the ends 71, 71, and on the outer peripheral side of the abutting surfaces corresponding to the ends 71, 71. A groove 73 into which the filter 30 is fitted is formed, and when the filter 30 is pulled up, the ends 71, 71
Even if a small amount of force is applied to this end 7, which has a small cross section,
1 and 71 are not damaged, and the corner portions are rounded so that the protruding piece 72 and the groove 73 are disengaged when a force exceeding a predetermined level is applied.
Since this locking is performed on the outer peripheral side of the filter 30, there is less adhesion of debris and cleaning is easy.

Further, the spiral body 30A has an outer diameter slightly smaller than the inner diameter of the cylindrical portion 29b (the tips of the protrusions 57...), and the outer circumferential surface 74 is in contact with the protrusions 57... and the inner circumferential surface 7
5 is a tapered surface 75a whose diameter increases symmetrically upward and downward from the midpoint 0 as shown in FIG.
75a, the rotation of the separation cylinder 29 allows the dregs to be accumulated from below first, and also facilitates the removal of the dregs from the filter in the downward direction.

Further, the cross-sectional shape of each stage of the spiral body 30A is as shown in FIG.
a, 76a, thereby reducing the flow resistance of the liquid flowing out from the gap 69, and the inner surface 76
b is a flat surface to facilitate the movement of debris.
Note that the form of this notch is not limited to that shown in the drawings. or,
If it is not necessary to improve the mobility of debris, the inner surface may be curved.

Further, referring to FIG. 4, the spiral body 30A forms a liquid flow gap 69 between each step, and also forms flat surfaces 77a and 77b on the surfaces forming the gap, and the lower surface of the lid 61 and the low step portion 52 of the cylindrical portion 29b. Liquid flow gap 7 between the top surface and
9,80 is formed. This gap is a constant value (for example, 0.4 mm) between each stage when the lid is closed as shown in the same figure.
In order to prevent the helical gap 69 from becoming narrower, gap retaining protrusions 81 of the same height are provided on the flat surface 77b of the lower surface of the spiral body 30A, which is the gap forming surface, over substantially the entire radial width of the helical gap 69. In the gaps 79 and 80, protrusions 8 are formed on the upper and lower end surfaces of the spiral body 30A.
1. Protrusions 82 for maintaining the spacing are formed at the same height as 1. These protrusions 81..., 82... make the ease of liquid outflow approximately equal over the entire vertical direction of the filter. Incidentally, the latter protrusion 82... is the spiral body 3.
Instead of being provided on 0A, they may be provided on the lid 61 and the cylindrical portion 29b side, and the former protrusions 81... may be provided on the upper surface side of the spiral body 30A. Also, the protrusions 81..., 82...
may be a knurled protrusion.

Further, the spiral body 30A has a cylindrical portion 29b and a lid 6.
Rotation is prevented by convex-concave engagement between the base and the base plate 1. That is, a large number of substantially V-shaped engagement grooves 83 having the same shape at the top and bottom are formed at the outer corners of the top and bottom stages of the spiral body 30A over a range of a predetermined angle (approximately 60 degrees in this embodiment). A pair of substantially V-shaped protrusions 84 are formed in the upper grooves 83 in symmetrical positions, and are formed at predetermined angle intervals (approximately 60 degrees in this embodiment) on the inner circumferential corners of the lid 61. By fitting, rotation is prevented between the lid 61 and the groove 8 at the lower end.
The protrusions 59 of the cylindrical portion 29b fit into the cylindrical portions 3 and 3, thereby preventing rotation between the cylindrical portion 29 and the separation tube 29.

Further, the spiral body 30A is set so that the winding direction is the direction in which the diameter increases, that is, for example, the separation tube 29
When the direction of rotation is counterclockwise x when viewed from above, the winding direction from top to bottom is clockwise when viewed from above. If the winding is reversed to this winding direction, as the separating cylinder 29 rotates, the diameter of the helical body 30A will contract, and at the same time, a force will act in a direction in which the length in the axial direction of the cylinder will increase, and this force will act as a force to remove the lid 61. In some cases, there is a risk that the engaging portion between the lid 61 and the separation tube 29 may be damaged and the lid 61 may be blown off.However, if the winding direction of this embodiment is used, the spiral body 30A may be damaged as the separation tube 29 rotates. Since the force acts in the direction of expanding the diameter of the cylinder and contracting the length in the axial direction of the cylinder, such a drawback is eliminated and the locking structure of the lid 61 can be simplified.

The lid 61 is fitted and locked into the large diameter portion 60 at the upper end of the cylindrical portion 29b as shown in FIGS. 4 and 11 to 13 to prevent the filter 30 from coming off.
It is configured to have a function of preventing debris accumulated on the inner circumference from flying out. 61a is a cylindrical vertical portion in contact with the large-diameter portion 60, and projections 85 are provided at equal intervals on the outer peripheral surface, and the large-diameter portion 60 is arranged between the projections 85, 85.
The vertical groove 86a through which the protrusion 62 passes and this groove 86a
A large number of grooves 86 are formed at equal intervals, and the inner circumferential surface 87 is tapered to expand downward, and a groove 86 is formed on the outer periphery of the upper end of the spiral body 30A. Abutting longitudinal protrusions 88 are formed, and a liquid flow gap 89 is formed between the spiral body 30A and the spiral body 30A. Also, the large diameter portion 6
There is also a liquid flow gap 9 between the inner surface and the vertical portion 61a.
0.91 is formed. This liquid flow gap 91
is mainly composed of grooves 86... and grooves 100 above them. Reference numeral 61b denotes a horizontal portion formed with an opening 93 having a diameter smaller than the inner diameter of the spiral body 30A and having a downward protrusion 92 on the periphery.The flat lower surface presses the upper end surface of the filter 30, and the peripheral edge of the opening 93 removes waste. It acts as a prevention against jumping out.

Further, referring to FIG. 2, the container lid 21b has a material input tube 44 integrally vertically disposed opposite a portion off the center of the cutter 38, and a material input tube 44 is integrally provided on the periphery thereof so as to cover substantially the entire surface of the cutter 38. A regulating plate 41 is integrally provided to protrude in the horizontal direction. The outer edge of the regulating plate 41 is bent downward to form a hanging portion 41a located outside the re-cutting blades 40 and facing the extending portions 42. This hanging portion 41a is formed with one or more slits for concentrating the material and protruding from it, and is also integrally formed with projections 94 for pressing the material cut on the outer peripheral surface. 95 is a push rod inserted into the material input cylinder 41 to push the material;
6 is a protrusion formed obliquely in the direction to discharge the excess waste to the outside of the separation cylinder when excessive waste is accumulated.

Further, the container lid 21b is secured to the container 21 by a clamp device 97 attached to the main body case 2 as shown in FIG.
A is pressed onto the main body case 2 with the lid closed and fixed.

() Regarding the liquid outlet C 119 is a cup for receiving the liquid from the outlet 25, which has a substantially triangular cross section and is placed on the lower step 9 formed in the front corner of the main body case 2 and having a substantially triangular shape in plan. A handle 120 is provided at the corner to facilitate removal from the front side of the main body.

Next, the operation of the above embodiment will be explained. Before liquid generation, the filter 30 is in an extended state as shown in FIG.
As shown in FIG.
3 and 73, and then installed into the cylindrical portion 29b. Then, while compressing the filter 30, the lid 6 is
1 into the large-diameter portion 60 of the cylindrical portion 29b, and insert the protrusions 62 into the horizontal grooves 86b from the vertical grooves 86a in a clockwise direction (opposite to the rotational direction of the separation cylinder 29) when viewing the lid 61 from above. Rotate the protrusions 62... to the horizontal grooves 86.
b... is connected to the cylindrical portion 29b by positioning it in the inner part. In this state, the filter 30 is contracted as shown in FIG. 4 to prevent it from popping out. Then, the inner surface of the lid 61 and the filter 3 are connected by the projections 82 on the upper end.
0, a gap 79 is maintained between the upper end surface 70, a gap 69 by the protrusions 81, and a gap 80 by the protrusions 82 at the lower end. At the same time protrusion 59
The lower end of the filter 30 is engaged with the cylindrical portion 29b by engagement with the grooves 83 at the lower end, and the upper end of the filter 30 is engaged with the lid 61 by engagement between the protrusions 84 and the grooves 83 at the upper end. The filter 30 is stopped from rotating upwardly and downwardly.

Next, the container lid 21b is closed on the receiver 21a, and the clamp device 97 is rotated to engage the lid 21b, thereby completing the use liquid production preparation state. Then, by driving the electric motor, materials such as fruits and vegetables are introduced into the input tube 44 and pushed by the push rod 95. Then, the material is grated by the grater blade 39, but large materials such as skin that could not be grated and cut are cut into small pieces by the re-cutting blade 40,
The particles are blown outward in the horizontal direction through the gap between the filter 9a or the notch in the hanging portion 41a, and adhere to the inner periphery of the filter 30. This adhered cut material descends along the tapered surface 75a of the filter 30 and is separated into scraps and liquid, and the liquid flows through the gaps 80 and 69 and reaches the inner periphery of the cylindrical portion 29b. and protrusion 5
After moving upward through the flow gap 58 formed by 7..., it flows out of the separating cylinder 29 through the flow gaps 90, 91 between the lid 61 and the cylinder part 29b, and is received in the container 21a. . This liquid is transferred to the outlet 25
The water flows down from the water and is received by the cup 119.

On the other hand, waste portions are accumulated sequentially from the inner lower end H of the filter 30 while being held down by the holding projection 41a, resulting in an accumulation state as shown in FIG. 13. When the material is further cut, the material to be cut is also accumulated in the upper inner half of the filter 30, and the liquid separated from the material to be cut in the lower part of the horizontal part 61b of the lid 61 is collected in the gap 79-8.
It flows out of the separation cylinder 29 through 9-90-91 and 69-90-91. This liquid leaks out from the lid 61.
This is done smoothly by tapering the inner peripheral surface 87 of the. Further material is cut to form the opening 9 of the lid 61.
If it accumulates inside the 3rd diameter, the protrusion 9
6, the waste is discharged to the outside of the separation cylinder 29.

During this generation of waste, the debris adhering to the inner periphery of the filter 30 tries to expand the gap in the liquid outflow gap 69 due to centrifugal force, but since the upper end of the filter 30 is held down by the lid 61, this gap is It remains constant without spreading. As a result, the waste is prevented from flowing out of the filter 30 through the gap 69, and a large amount of waste is prevented from being mixed into the liquid.

To remove the waste after generating such waste, first stop the electric motor, remove the clamping device,
Remove the container lid 21b. When the lid 61 is rotated to disengage from the cylindrical portion 29b, the filter 30 expands due to its own elasticity as shown in FIG. 14, and its upper end protrudes above the upper end of the cylindrical portion 29b. By holding this protrusion and pulling upward, the filter 30 can be removed.
can be easily taken out of the separation cylinder 29. This filter 30 has debris K attached to the lower part of the inner periphery.By holding both ends of the filter 30 and expanding and contracting it, as well as shifting it laterally as shown in FIG. easily separate from the Furthermore, fibers and the like remaining in the gap 69 can be easily washed away by washing with water in this expanded state because the gap 69 expands due to its own elasticity.

In addition, in order to clean the inside of the separation cylinder 29, the base part 2
9a and the connector 11, and separate the separation tube 29.
After removing the ring body 29c, the inside can be washed with water, but cleaning becomes easier by removing the ring body 29c from the base portion 29a and separating the base portion 29a and the cylindrical portion 29b.

In the configuration of the above embodiment, the upper and lower end surfaces 70, 70 of the spiral body 30A are flat surfaces, and the lower surface of the lid 61 and the inner bottom surface of the separation tube 29, which the upper and lower end surfaces 70, 70 abut, respectively, are flat surfaces. The distances between the liquid flow gaps 79 and 80 between the spiral body 30A, the lower surface of the lid 61, and the inner bottom surface of the separation tube 29 are kept constant over the entire range of the rotational direction. To maintain the gaps 79 and 80, if the shape of the final stage of the spiral body 30A is not changed, a step will be formed at the final stage, and in order to prevent a large amount of waste from flowing out from this step, the inner bottom surface of the separation cylinder 29 and the lid 61 should be A stepped groove (not shown) into which the stepped portion of the spiral body 30A fits into the lower surface
The gap between the liquid flow gaps must be kept constant by forming the filter 30.
The mounting position of the filter 30 and the lid 61 in the separating cylinder 29 is limited to one location in the rotational direction, and the mounting position of the lid 61 is also limited to one location, making the mounting work of the filter 30 and the lid 61 extremely difficult. However, the configuration of the embodiment can eliminate such drawbacks.

Further, as a method of changing the thickness in the cylindrical axis direction of the final stages 30a and 30b of the spiral body 30A, it is also possible to sequentially change the thickness at the end so that the thickness becomes zero. In this case, there is a disadvantage that the terminal end becomes sharp, which is dangerous, and the strength of the terminal section is weakened. However, these disadvantages can be overcome by making the geta cover the thickness of the terminal end as in the above embodiment.

Furthermore, since the terminal ends 71, 71 are engaged at the abutting portions, when the filter 30 is taken out, the weight of the accumulated waste and the weight of the filter 30 are added to the uppermost stage 30a, but this weight This prevents the filter 30 from stretching too much in the axial direction of the cylinder or damaging the thin end. This point also applies to the lowermost stage 30b. Further, when cleaning the filter 30, the terminal end portion is disengaged, making cleaning easier.

It should be noted that the present invention is not limited to the above embodiment, and for example, the winding direction of the filter 30 and the separating tube 29
The relationship between the direction of rotation and the direction of rotation may be reversed. Further, the filter 30 may be configured to be in the most contracted state when no force is applied. Furthermore, the spiral body 30A of the filter 30 may be formed hollow, and the cross-sectional shape may be a shape other than that shown in the drawings. In this case, the spiral body 3
0A can be formed by extrusion.
Further, it is also possible to form a concave groove (not shown) in the filter 30 into which the protrusions 57 of the cylindrical portion 29b fit, so that the protrusions 57 also serve to prevent the filter from rotating. Further, the protrusions 57 may be discretely formed protrusions.

(F) Effects of the Invention According to the present invention configured as described above, by expanding and contracting the spiral body in the direction of the cylinder axis or shifting it in a direction perpendicular to the cylinder axis direction, the interval of the liquid flow gap can be greatly changed. This makes it easy to separate the waste from the filter, and also allows cleaning with a large liquid flow gap, making it easy to clean the filter and keeping the filter clean at all times. can be kept. In addition, the upper and lower end surfaces of the cylindrical filter are made substantially flat, and the inner bottom surface of the separation cylinder is made a substantially flat surface, making the liquid flow gap substantially constant over the entire rotational range, so that when the filter is installed, there is no problem in the rotational direction. It can be installed without any consideration of the installation position, and has great effects such as ease of installation work.

[Brief explanation of the drawing]

1 to 15 all show one embodiment of the present invention, FIG. 1 is a front view, FIG. 2 is a front cross-sectional view of a main part notch, and FIG. 3 is a main part with the lid 61 removed. Plan view, Fig. 4 is a vertical cross-sectional view of the main part, Fig. 5 is a cross-sectional view of the main part, Fig. 6 is an exploded front view of the main part, Fig. 7 is a front view of the main part, Fig. 8 is a plan view of the same, Fig. 9 A and B are side views showing different states of the same part, FIG. 12 is a sectional view taken along the line A-O-Y in FIG. 11, FIG. 13 is an enlarged front view of the main part of FIG. 12, and FIGS. 14 and 15 are longitudinal sectional views of the main part showing different operating states. 21... Container, 29... Centrifugal tube, 30... Filter, 30A... Spiral body, 30a, 30b... Final stage, 3
8...Katsuta, 70, 70...Upper and lower end surfaces.

Claims (1)

[Claims] 1. A centrifugal separation tube that has a cutter for cutting material on the inner bottom and is rotated by a motor, and a tube that is detachably attached to the inner circumference of this separation tube and separates the cut material into waste and liquid. In the extractor, the cylindrical filter is provided with a container for receiving the liquid flowing out from the centrifugal tube, and the scum is collected in the centrifugal tube, and the cylindrical filter is arranged in a spiral liquid flow gap that allows the interval to be expanded. At the same time, the cross-sectional shape of the final stage of the spiral body is changed to form the upper and lower end surfaces of the spiral body to be substantially flat surfaces, and the inner bottom surface of the centrifugal separation tube, which the lower end surface of the spiral abuts, is substantially flat. Jusa formed on the surface.