Side plate unit and centrifugal projector

Patent metadata

Field	Value
Publication number	US-10112284-B2
Application number	US-201415032859-A
Country	US
Kind code	B2
Filing date	Sep 26, 2014
Priority date	Oct 31, 2013
Publication date	Oct 30, 2018
Grant date	Oct 30, 2018

Abstract

The present invention is a side plate unit ( 10 ) used in a centrifugal projector ( 1 ) which projects projection material ( 2 ) toward a processing target by rotating a plurality of blades ( 3 ), and the side plate unit ( 10 ) being provided to attach the plurality of blades thereto, the side plate unit ( 10 ) comprising: a pair of side plates ( 11 ); and a joining member ( 12 ) for joining the pairs of side plates; wherein guide channel portions ( 13 ) are respectively formed on mutually opposing surfaces of the pair of side plates ( 11 ); and the side plate guide channel portions ( 13 ) are formed to be pitched so that the radial outer side thereof is positioned to a rear in the rotational direction (R 1 ) compared to the radial inner side thereof.

First claim

What is claimed is:

1. A side plate unit used in a centrifugal projector which projects shot blast materials at a processing target, the side plate unit comprising:
a pair of side plates configured to rotate around a rotation axis in a first rotation direction;
a plurality of blades attached to the pair of side plates for rotation with the pair of side plates;
a joining member configured to connect the pairs of side plates together;
guide channel portions formed in opposing surfaces of the pair of side plates; and
side plate guide channel portions formed in the opposing surfaces of the pair of side plates, the side plate guide channel portions being inclined so that radially outer side of each side plate guide channel portion is positioned rearward of a radially inner side thereof in a second rotation direction opposite to the first rotation direction, wherein
the guide channel portion formed in the opposing surfaces of the pair of side plates has an outside part formed straight in shape,
each blade is formed with a pair of planar side walls having front edges and rear edges and extending perpendicularly to the rotational axis through a radial length of the blade along circumferential sides of the front surface, the front edges being shaped straight throughout its radial length and projecting generally in the first direction from the circumferential sides of the front surface, the rear edges being shaped straight in parallel to the front edges except radially inner end portions thereof from which locking portions project in the second direction, and
the side plate guide channel portion of the side plate has an inside part formed wider in a direction perpendicular to a direction of the side plate guide channel than the outside part, the inside part being configured to locked with the locking portion to secure the blade in position.

2. The side plate unit according to claim 1 , wherein each blade has a back surface facing the second rotation direction, the back surface being formed with (i) a raised portion projecting in the second rotation direction and (ii) a curved surface forming a slope on a radially outer side of the raised portion, and
the joining members is disposed, respectively, between oppositing front surfaces and back surface of two adjacent blades of the plurality blades at a position closer to the back surface of one of the two adjacent blades than a midpoint position (K 3 ) between the opposing front surface and back surface of the two adjacent blades.

3. The side plate unit according to claim 2 , wherein the side plate unit and the blades are rotated by a rotary shaft, and
a respective joining member is positioned relative to the blade, with which the joining member is in abutment, so that an imaginary plane running, in parallel to the rotational axis, through the base end of the blade and a tip of the raised portion thereof goes through inside of the joining member between a center axis of the joining member and a circumferential surface of the joining member opposite to a circumferential surface of the joining member being in abutment with the curved surface formed in the back surface of the blade.

4. The centrifugal projector according to claim 1 , wherein the side plate unit and the plurality of blades are rotated by a rotary shaft,
the side plate unit is attached to the rotary shaft by a bolt, and
the side plate guide channel portions each have a concave portion configured to receive a head of the bolt.

5. The side plate unit according to claim 4 , wherein the pair of side plates are formed and positioned in a plane-symmetrical fashion with respect to an imaginary plane (P 3 ) running at a center of the joining members perpendicular to the joining members.

6. A centrifugal projector comprising the side plate unit of claim 1 , comprising:
a control cage disposed in a center portion of the side plate unit radially inward from the plurality of blades, the control cage having an outer peripheral surface formed with an opening therein, wherein the control cage is configured to deliver the shot blast materials out of the opening into between the plurality of blades;
a distributor disposed inside of the control cage for rotation with the pair of side plates, the distributor configured to mix the shot blast materials and supply the mixed shot blast materials to the control cage; and
a rotary shaft driven to rotate the side plate unit, the plurality of blades and the distributor in the first rotation direction,
wherein the plurality of blades are inclined so that a radially outer side of a respective blade is positioned further in the second rotation direction than a radially inner side thereof.

Assignees

• Sintokogio Ltd

Inventors

• Suzuki Hiroaki
• UMEOKA Masato

Classifications

• B24C5/06 Primary

  Impeller wheels; Rotor blades therefor · CPC title

• B24C5/064

  One-piece wheels; Integral impeller units, e.g. made by casting · CPC title

• B24C5/062

  Rotor blades or vanes; Locking means therefor · CPC title