JPS645949B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides a substantially cylindrical sieving porous wall in a machine body that can freely vibrate, and in 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 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 frame F requires the operation of a large number of bolts 37, which is troublesome.

It is an object of the present invention to improve the structure for attaching the wire mesh to the frame body, so that the wire mesh can always be reliably maintained at a predetermined tension state, and damage to the wire mesh can be effectively suppressed, and
The purpose is to make it possible to easily and quickly attach and detach only the wire mesh.

The characteristic configuration of the sieving machine according to the present invention is that the sieving machine has a somewhat wide flat plate-shaped sieving wire mesh installed in a substantially cylindrical frame provided in the body of the machine, which is forced to vibrate with a rotating body for dispersing powder and granular material inside. At the same time, a locking member is provided to protrude in the upper axial direction of the outer periphery of the frame in correspondence with the wire mesh, and the mating side ends of the wire mesh are tension-joined to each other with respect to the locking member. , and the circumferential end is clamped and installed using a fixing tool and a tightening band.

Next, examples will be shown.

As shown in Figures 1 and 2, caster 1
A machine body 3 is swingably mounted on a machine base 1 equipped with It is connected to the body 3 so as to vibrate in the direction of the arrow A, and a substantially cylindrical porous wall 5 for sieving is provided in the machine body 3 horizontally, and a rotating body 6 for dispersing powder and granules is attached to the porous wall 5. In addition, it is connected to the machine base 1 via a belt transmission mechanism 7 with a tension pulley.
A passage 9 and a metering feeder 10 are provided in the porous wall 5 to supply raw materials from one end thereof, and are connected to a motor 8 such as an electric type, and at the other end,
A passage 11 for discharging coarse powder from inside the porous wall 5 and a passage 12 for discharging fine powder from inside the fuselage body 3 are provided. Note that the rotating body 6 may have various shapes other than those shown in the drawings in order to feed the raw material in the rotational circumference or in the direction of the passage 11. For example, the outer peripheral end may have a saw blade shape, a flexible brush shape, Or you can change the design to have a notch in the appropriate shape, etc.
In order to prevent vibrations, it is more effective to arrange the tension pulley of the belt transmission mechanism 7 on the tension side of the belt.

Furthermore, a wire mesh (not shown) having a relatively large opening size or a punching plate may be interposed near the upper opening of the raw material supply passage 9 to prevent passage of coarse foreign matter in the supplied raw material.

In this way, when a constant amount of raw material is continuously fed from the feeder 10 while the machine body 3 is forcibly vibrated and the rotary body 6 is driven, the raw material is formed in a layer over the entire circumference of the porous wall 5 due to the action of the rotary body 6. At the same time, 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 raw material is projected onto the porous wall 5. The powder is sieved by forced vibration of the porous wall 5 by the vibrator 4, and the sieved coarse powder and fine powder are taken out from separate passages 11 and 12. be.

In addition, weirs 13 having notches 13a for preventing residual powder and granules 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 powder and granules are discharged when the raw material is not sufficiently sieved. The structure is such that it is prevented from being sent to the water passageway 11. And the viewing window 3a of the fuselage 3
The upper cover 3b is detachably provided and fixed with a fastener 14, so that internal inspection can be performed. In addition, the fastener 14 may be connected to the upper lid body 3b side by a locking claw or a hinge type.

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
a are arranged at appropriate intervals and connected by frame parts 16, 16a, and plate-shaped mounting seats 16b protruding inward are formed at the four corners of the frame parts 16a at both ends to form the frame F. The two frames F with wire mesh configured in this manner are connected to each other by bolts 19 at the end frame portions 16a, and a cylindrical attachment projecting inward from the fuselage 3 is installed. Both ends of the frame F connected to the seat 3c are fitted externally. The mounting seat 16b is arranged so as to fit inside the cylindrical mounting seat 3c to regulate the axial position of the frame F, and even when the upper lid 3b of the fuselage 3 is opened, the frame F is It is now possible to take it in and take it out. Furthermore, a belt-shaped locking member 18 is provided on the upper part of the outer circumference of the frame F, and has a length that projects somewhat to the outside of the frame F in the axial direction, and is covered with a gasket 21 having a U-shaped cross section. .

The wire mesh 17 is made somewhat wider than the length of the frame F, and its mating side ends are held between a pair of bent band-like holding plates 22a and 22b, while the circumferential side end 17a is A sealing gasket 23 is stretched. Note that the gasket 23 is connected to the wire mesh 1
7, there is a recess 23a on the curved outer periphery side to facilitate attachment of the tightening band 25, and a cavity 23b near the inner periphery for improving sealing performance. is provided over the entire length in the circumferential direction. In this way, the wire mesh 17 is attached by stretching the wire mesh 17 in a cylindrical shape along the frame F, overlapping the holding plates 22a and 22b on the locking member 18 from both sides, and then fixing it in a hook shape. Ingredients 2
4, and the wire mesh 17 is wrapped around the curved portions 15, 15a of the frame F in the longitudinal direction and attached under tension.
The circumferential end 17a of the wire mesh 17 on the outside of the wire mesh 5a is pressed against the cylindrical mounting seat 3c using the tightening band 25.

As shown in FIGS. 6 and 7, the fixing device 24 and the tightening band 25 are elastic fasteners 26 whose tips are bent into a hook shape.
The tightening band 25 has a latch portion formed by a distal end 28a of an elastic connector 28 having substantially the same shape as the elastic fastener 26, and is provided with a hook 30. Elastic band 29
is configured by being locked to the handle lever 27b. In this way, the wire mesh 17 is brought into pressure contact with the cylindrical mounting seat 3c over almost the entire circumference, and it is possible to prevent the powder from accidentally flowing out.

Next, another example will be shown.

Holding plate 22 when attaching wire mesh 17 to frame F
As shown in Fig. 9, the connection between a and 22b is as follows.
One end side of the bent elastic connecting plate 31 may be engaged with one holding plate 22a, and a set screw 32 with a handle screwed onto the other end side of the connecting plate 31 may be engaged with the other holding plate 22b. As shown in FIG. 10, a handle 33 is used instead of the set screw 32 with a handle.
A cam-type pressing member 35 that rotates around the pin 34 may be provided, and various other connection configurations can be freely selected and utilized.

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

The shape, structure, number of divisions, etc. of the frame F 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 granular material, and their drive configuration, can also be changed.

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

(a) A wire mesh 1 is placed around the entire circumference of the cylindrical frame F.
7 is wound around the porous wall 5 and attached while being maintained in a tensioned state at all times, the opening size of the porous wall 5 can be reliably maintained without deformation for a long time.

(b) As in (a), the tension caused by wrapping the wire mesh 17 will only apply a tensile load to the wire mesh 17, so the wire mesh 17 can be tensioned without strain;
Loosening, bending, and breakage of the wire mesh 17 can be effectively prevented, and the wire mesh 17 can be made to have excellent durability.

(c) Due to (a) and (b) above, in the present invention, the many joints of the wire mesh, which were one of the causes of powder leakage or breakage in the conventional wire mesh, can be removed from the upper part of the circumference. Since there is only one place, powder leakage and damage to the joints are reduced, and the life of the wire mesh is extended.

(d) Since the wire mesh 17 can be attached and detached by a simple operation of wrapping only the wire mesh 17 around the frame F, the wire mesh 17 can be replaced quickly and efficiently.

(E) Although the cylindrical porous wall 5 can be used more effectively over the entire sieve surface than a flat plate, it has been considered inconvenient to inspect; however, according to the present invention, the wire mesh 17 can be easily removed. For some reason, again,
It can be made into a flat plate during inspection, making it extremely easy to detect damage.

(f) When preparing various opening dimensions of the porous wall 5,
Since only the wire mesh 17 is required, it is much more economical than the conventional one with a frame.

(G) When preparing a spare part of the wire mesh 17, only the wire mesh 17 stretched into a flat plate shape is necessary, so it does not take up much space.

(H) Conventional wire mesh with a frame has rivet holes, nail holes, etc. for attaching it to the frame, but according to the present invention, mounting holes are not required to attach the wire mesh to the frame.
The wire mesh 17 is advantageous in terms of strength because it is not damaged by the mounting holes or during mounting.

(li) The frame F to be attached to the cylindrical mounting seat 3c has seal portions on the outside of both ends of the cylindrical shape, so it may be bent, and high accuracy is not required for close contact with the cylindrical mounting seat 3c. Therefore, there is no need for packing between the two, so maintenance and inspection are easy and economical in this respect as well.

[Brief explanation of drawings]

1 to 8 show embodiments of the present invention,
Figure 1 is a partially cutaway front view, Figure 2 is a cross-sectional view of the fuselage, Figure 3 is an exploded perspective view of frame F, and Figure 4 is an enlarged sectional view of the attachment part of the porous wall to the fuselage. , FIG. 5 is an enlarged sectional view of the main part of the porous wall, FIG. 6 is a perspective view of the tightening band 25, FIG. 7 is a perspective view of the fixture 24,
FIG. 8 is a perspective view of the wire mesh 17, FIG. 9 is a sectional view of the main part of another embodiment, and FIG. 10 is a front view of the main part of still another embodiment. FIG. 11 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
...Circumferential end, 18...Locking member, 22a, 2
2b...Retaining plate, 24...Fixing tool, 25...Tightening band, F...Frame body.

Claims (1)

[Claims] 1 A substantially cylindrical porous wall 5 for sieving is provided in the machine body 3 which can freely vibrate forcibly, and a rotating body 6 for dispersing powder particles is provided in the porous wall 5 so as to be freely driven and rotatable. A sieving machine comprising a passage 9 for supplying raw materials, a passage 11 for discharging coarse powder from inside the porous wall 5, and a passage 12 for discharging fine powder from inside the machine body 3, The porous wall 5 is attached to a pair of semicircular frames F and a somewhat wide wire mesh 17 extending along the outer periphery of the frame F to a cylindrical mounting seat 3C protruding inward from the fuselage 3. The frame body F
A locking member 18 is provided protruding in the upper axial direction of the outer periphery in correspondence with the wire mesh 17, and the wire mesh 1
7, and the circumferential end 17a is clamped to the cylindrical mounting seat 3C using the fixture 24 and the tightening band 25. A sieving machine characterized by being configured as follows.