JPS635818Y2 - - Google Patents

Description

[Detailed description of the invention] This invention provides a substantially cylindrical porous wall for sieving in the machine body that can freely vibrate, and inside the porous wall,
A rotary body for dispersing powder and granules is provided to be rotatably driven, and includes a passage for supplying raw materials into the porous wall, a passage for discharging coarse powder from inside the porous wall, and a passage for discharging coarse powder from inside the machine body. The present invention relates to a sieving machine equipped with a passage for discharging .

The above-mentioned sieving machine was proposed in Japanese Patent Publication No. 44-6488, etc., as a device that can efficiently sieve powder and granules. The curved sieving wire mesh 17 was attached to the shape-retaining frame F while being held down by a band 36 over the entire circumference.

The disadvantage of the above-mentioned conventional mounting structure for the wire mesh 17 is that the wire mesh 17 tends to loosen due to particles colliding with it as the sieve machine is operated for a long time, and the ends 17a of the wire mesh 17 are tightened by the bolts 37. In addition, attaching and detaching the wire mesh 17 to and from the shape-retaining frame F required the operation of a large number of bolts 37, which was troublesome.

The purpose of this invention is to improve the structure for attaching the wire mesh to the shape-retaining frame, so that the wire mesh can always be maintained in a predetermined tension state, damage to the wire mesh can be effectively suppressed, and it is possible to easily attach and detach the wire mesh. The aim is to make it easy and quick.

The characteristic configuration of the sieving machine according to the present invention is that the substantially cylindrical porous wall for sieving is provided in the body of the machine, which is forced to vibrate with a rotating body for dispersing powder and granules installed inside.
Consisting of a pair of shape-retaining frames formed by curved lattice-like members into a semi-cylindrical shape, and a pair of sieving wire meshes curved into a semi-cylindrical shape so as to cover the periphery of each shape-retaining frame. A protrusion facing the folded portion at the axial end of the sieving wire mesh is formed at the end of the shape-retaining frame in the axial direction, and the pair of semi-cylindrical shape-retaining A flange-like frame portion is formed at both ends in the circumferential direction of the frame, and the pair of shape-retaining frames are attached to the flange-like frame portion with the frame portions facing each other. and a wire mesh attachment mechanism that elastically pulls the circumferential end of the sieving wire mesh toward the tension side via an elastic biasing device and fixes it to the shape retaining frame. This is due to the fact that a fixing device has been installed.

The effects of the characteristic configuration of the present invention are as follows.

(b) By constantly tensioning the wire mesh with the fixing device, the wire mesh can be kept in the desired tension at all times, regardless of long-term operation of the sieving machine, and the desired quality of powder can be maintained. Grain sieving can now be performed reliably.

(b) By using the tension of the wire mesh by the fixing device, the folded portion of the wire mesh is brought into pressure contact with the protrusion of the curved portion of the frame, thereby preventing the flow of powder and granules from between the curved portion of the frame and the folded portion of the wire mesh. Therefore, the phenomenon in which the end portion 17a of the wire mesh is strongly clamped as in the conventional case is eliminated,
It is now possible to effectively prevent wire mesh breakage,
Made with excellent durability.

(c) There is no need for a fixing means to directly connect the curved part of the frame and the folded part of the wire mesh, making it easier and faster to attach and detach the wire mesh to the frame than before, which is also advantageous in terms of repair and inspection. .

Next, examples will be shown.

As shown in FIGS. 1 and 2, a machine body 3 is swingably attached to a machine base 1 equipped with removable casters 1a via an elastic support 2 made of rubber or the like. An appropriate vibrator 4, such as one rotated by an electric motor, is connected to the machine body 3 so as to vibrate it in the direction of arrow A, and the approximately cylindrical sieving porous wall 5 is placed horizontally on the machine body 3. A rotating body 6 for dispersing powder and granular material is provided within the porous wall 5, and a belt transmission mechanism 7 with a tension pulley is provided within the porous wall 5.
A passage 9 and a metering feeder 10 are provided in the porous wall 5 for supplying the raw material from one end thereof to the prime mover 8 of the machine 1, such as an electric motor, through the A passage 11 for discharging coarse powder from inside the machine body 3 and a passage 12 for discharging fine powder from inside the machine body 3 are provided.

In other words, when a constant amount of raw material is continuously fed from the feeder 10 while the machine body 3 is forced to vibrate and the rotating body 6 is driven, the raw material is layered around the entire circumference of the porous wall 5 due to the action of the rotating body 6. With becoming,
The raw material is transferred along the porous wall 5 to the discharge passage 11 side by the feeding action of the rotary body 6 and the feeding action of the vibrator 4, and the raw material is transferred to the discharge passage 11 side by the rotary body 6 and the vibrator. 4 by forced vibration of the porous wall 5, and the sieved coarse powder and fine powder are taken out through separate passages 11 and 12, respectively.

In addition, weirs 13 having notches 13a for preventing residual powder particles are installed in parallel at the lower part of the porous wall 5 on both the upper and lower sides as necessary, so that coarse particles can be discharged when the raw material is insufficiently sieved. The structure is such that it is prevented from being sent to the passage 11. An upper lid portion 3b with a viewing window 3a of the fuselage 3 is provided removably and fixed with a fastener 14, so that internal inspection can be performed.

Next, the structure of the porous wall 5 will be explained with reference to FIGS. 3 to 5.

Almost semicircular curved parts 15, 15 arranged in parallel
Frame parts 16, 16 in which pieces a are arranged at appropriate intervals
a to form a lattice shape, and frame parts 16a at both ends are formed in a shape that protrudes outward over the entire length to constitute a shape-retaining frame F, which is used for sieving. A wire mesh 17 is bent into a substantially semi-cylindrical shape and stretched over a shape-retaining frame F to constitute a porous wall. Then, the two shape-retaining frames F with wire mesh of the porous wall 5 configured in this way are connected to each other by inserting a gasket 1 between the flange-like frame portions 16a provided at both ends in the same direction.
8 is interposed, bolt 19 and nut 20
connected by a connecting mechanism A consisting of,
Both ends of the shape-retaining frame F connected to the cylindrical mounting seat 3c protruding inwardly from the fuselage 3 are fitted with an annular gasket 21 between the mounting seat 3c and the curved portion 15a at the end.
The upper lid 3b of the fuselage 3 is opened so that the shape-retaining frame F can be taken in and out, and the vertical positional relationship of the shape-retaining frame F is reversed. It is configured so that it can be done.

In addition, the wire mesh attachment mechanism B for fixing the sieving wire mesh 17 to the shape retaining frame F has both ends of the wire mesh 17 held between a pair of bent band plate-shaped holding plates 22a and 22b, and an L-shaped band plate. One end of 23a, 23b is locked to the holding plate 22a and the other end is locked to the end frame portion 16a, respectively, and the L-shaped band plate 23b acting on one end of the wire mesh 17 is fixed with bolts 24 and nuts 25. At the same time, the L-shaped band plate 23a acting on the other end side is tightened and fixed with a bolt 26, a spring 27 as an elastic biasing device, and a nut 28, and the wire mesh 17 is attached to the curved portion 15 of the shape-retaining frame F, The folded part 17a of the wire mesh 17 is attached to the wire mesh 17 in a tensioned state in the longitudinal direction, and due to the tension, the folded part 17a of the wire mesh 17 is attached to the curved end part 1.
The holding plate 22 is pressed by the protrusion 29 of 5a.
b is pressed against the end frame portion 16a, and the wire mesh 17
is in pressure contact with the shape-retaining frame F over almost the entire circumference to prevent the powder from accidentally flowing out.
Incidentally, openings 30 are provided corresponding to the frame body connecting bolts 19 and nuts 20, respectively, for inserting and removing the bolts 19 and nuts 20, or for operating them.
are formed on the L-shaped strip plates 23a and 23b, respectively. In this way, the shape-retaining frame F and the wire mesh 17 that constitute the porous wall 5 are connected to the connecting mechanism A that connects and fixes the semi-cylindrical shape-retaining frames F to each other, and A fixture C is configured to be assembled into a cylindrical porous wall 5 using a wire mesh attachment mechanism B that attaches the wire mesh in a state where the wire mesh is elastically tensioned.

Next, another example will be shown.

To connect the shape-retaining frames F to each other, as shown in FIG. A set screw 32 with a handle screwed onto the other end may be engaged with the recess of the other L-shaped band plate 23b, and as shown in FIG. 7, instead of the set screw 32 with a handle, , a cam-type pressing member 3 rotated around a pin 34 by a handle 33
5 may be provided, and various other connection configurations can be freely selected and utilized. In other words, these figures 6 and 7
In the illustrated example, the connecting plate 31 is an elastic body, and
By having a function as an elastic biasing device, the connecting plate 31 and the set screw with handle 32
Alternatively, the cam type pressing member 35 etc.
The structure is such that the porous wall 5 can be assembled with a single fixture C, serving both the functions of the wire mesh attachment mechanism B and the wire mesh attachment mechanism B.

The configuration for attaching the wire mesh 17 to the shape-retaining frame F in a stretched state can be changed, and these configurations are collectively referred to as a fixture.

The shape of the shape-retaining frame F, the formation structure of the protrusions 29, the number of divisions, etc. can be changed freely, and the configuration of each part of the sieving machine, such as the machine body 3, the rotating body 6 for dispersing powder and granules, and their drive configuration, can also be changed. It is changeable. Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

1 to 7 show embodiments of the present invention,
Fig. 1 is a partially cutaway front view, Fig. 2 is a cross-sectional view of the fuselage, Fig. 3 is an exploded perspective view of the porous wall, Fig. 4 is an enlarged sectional view of the attachment part of the perforated wall to the fuselage, FIG. 5 is an enlarged sectional view of the main part of the porous wall, FIG. 6 is a sectional view of the main part of another embodiment, and FIG. 7 is a front view of the main part of still another embodiment. FIG. 8 is an exploded perspective view showing a conventional porous wall. 3... fuselage, 5... porous wall, 6... rotating body,
9, 11, 12... passage, 15a... curved end portion, 16a... frame portion, 17... wire mesh, 17a
...Folded portion, 29...Protrusion, A...Connection mechanism,
B... Wire mesh attachment mechanism, C... Fixture, F... Shape retaining frame.

Claims (1)

[Scope of utility model registration request] A substantially cylindrical porous wall 5 for sieving is provided in the machine body 3 which can freely vibrate forcibly, and a rotary body 6 for dispersing powder particles is provided within the porous wall 5 so as to be freely driven and rotatable. Passage 9 for supplying raw materials, the porous wall 5
This sieving machine is provided with a passage 11 for discharging coarse powder from inside and a passage 12 for discharging fine powder from inside the machine body 3, and the porous wall 5 is formed of a grid-like member into a semi-cylindrical shape. It is composed of a pair of shape-retaining frames F curved in a shape, and a pair of sieving wire meshes 17 curved in a semi-cylindrical shape so as to cover the circumference of each shape-retaining frame F, A protrusion 29 facing the folded portion 17a at the axial end of the sieving wire mesh 17 is formed at the end of the shape retaining frame F in the axial direction, and the pair of semi-cylindrical retainers Flange-shaped frame portions 1 are provided at both ends of the frame body F in the circumferential direction.
6a, and this flange-like frame portion 16
a, a connecting mechanism A that connects and fixes the pair of shape-retaining frames F in a state where the frame portions 16a face each other, and an elastic biasing device that connects and fixes the pair of shape-retaining frames F in a state where the frame portions 16a face each other, and an end portion of the sieving wire mesh 17 in the circumferential direction. A sieving machine characterized in that a fixing device C consisting of a wire mesh attachment mechanism B that is elastically pulled toward the tension side via 27 or 31 and fixed to the shape retaining frame F is attached.