# US 10,501,266 B2 · Silent spiral conveyor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,501,266 B2 - Document ID: US10501266B2 - Status: Granted - Kind: B2 - Application number: 16/311,767 - Filed: 2017-06-21 - Published: 2019-06-06 - Granted: 2019-12-10 - Earliest claimed: 2016-06-22 - Assignees: Tokyo Seimitsu Hatsujo Co., Ltd. - Applicants: Tokyo Seimitsu Hatsujo Co.,Ltd. - Inventors: Takaaki Maeda; Sugihide Nakashima - Web page: https://patentgrep.com/patent/US10501266B2 ## CPC - B65G 33/04: conveyed between a single screw and guiding means - B65G 33/24: Details - B23Q 11/00: Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work {(accessories specially designed for sawing machines or sawing devices B23D59/00)}; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools (in respect of boring or drilling machines B23B47/32 takes precedence; safety devices in general F16P) - B23Q 11/0042: {Devices for removing chips (B23Q11/02, B23Q11/0875 take precedence)} - B65G 33/14: comprising a screw or screws enclosed in a tubular housing - B65G: TRANSPORT OR STORAGE DEVICES, e.g. CONVEYORS FOR LOADING OR TIPPING, SHOP CONVEYOR SYSTEMS OR PNEUMATIC TUBE CONVEYORS (packaging B65B; handling thin or filamentary materials, e.g. paper sheets or thread, B65H; cranes B66C; portable mobile or lifting or hauling appliances, e.g. hoists, B66D; devices for lifting or lowering goods for loading or unloading purposes, e.g. fork-lift trucks, B66F9/00; emptying bottles, jars, casks, barrels or similar containers, not otherwise provided for, B67C9/00; delivering or transferring liquids B67D; filling or discharging vessels for liquefied, solidified or compressed gases F17C; pipe-line systems for fluids F17D) - B23Q: DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING (tools of the kind used in lathes or boring machines B23B27/00); MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT ## Abstract A spiral conveyor having a novel structure that is adapted to handle any chip while having a simple structure and is capable of achieving low vibration and low noise is provided. A tray for a spiral conveyor is configured from an outer tray, an inner tray which is placed over the inside of the outer tray, and a vibration damping material which is interposed between the outer tray and the inner tray. The tray has a fixing means for detachably fixing the inner tray and the vibration damping material to the outer tray on the outside of a conveyance spiral casing. The vibration damping material may be a single vibration damping material which is continuous over substantially all of the area between the outer tray and the inner tray, or may alternatively be arranged so as to be separated into a lower vibration damping material that is provided in a noise generation area with which a conveyance spiral is brought into contact and upper vibration damping materials that are provided in a noise propagation area including the fixed portion. ## Claims ### Claim 1 A silent spiral conveyor wherein a coil-spring like conveyance spiral member is received in a tray and driven by a drive means such as a motor with a deceleration mechanism to be rotated at a low speed in a predetermined direction, thereby conveying chips thrown into said tray in a predetermined direction within said tray, said tray comprising: an outer tray, an inner tray placed inside of said outer tray with a gap therebetween, a first vibration dampening material interposed in the gap between said outer tray and said inner tray, and fixing means for detachably attaching said inner tray and the opposite ends of said first vibration dampening material to said outer tray. ### Claim 2 (depends on 1) The silent spiral conveyor according to claim 1, wherein said first vibration dampening material extends continuously between said outer tray and said inner tray, over substantially the entire areas including the opposite end portions thereof fixed by said fixing means. ### Claim 3 (depends on 1) The silent spiral conveyor according to claim 1, further comprising: a pair of projecting rails extend in a direction of conveyance at two opposite-angle positions with respect to a center line of said inner tray for substantially supporting said conveyance spiral member, said first vibration dampening material being divided into an arcuate lower vibration dampening material interposed between said outer tray and said inner tray over an area covering the center line and said rails, and a pair of planar upper vibration dampening materials interposed between said outer tray and said inner tray at the opposite end portions thereof attached by said fixing means. ### Claim 4 (depends on 1) The silent spiral conveyor according to claim 1, wherein said fixing means comprises a second vibration dampening material for preventing vibration of said inner tray from being transmitted to said outer tray, when it combines integrally said outer tray and said inner tray with each other with said first vibration dampening material being interposed therebetween. ### Claim 5 (depends on 4) The silent spiral conveyor according to claim 4, wherein said fixing means comprises a screw extending successively through said outer tray, said first vibration dampening material and said inner tray, and a nut that fastens said screw outside of said outer tray, wherein said second vibration dampening material is disposed in an area of contact of said nut and said screw. ### Claim 6 (depends on 1) The silent spiral conveyor according to claim 1, wherein said fixing means comprises a presser plate having one end being fixed by a fastening means to said outer tray outside of the end portion of said inner tray, said presser plate operating as a leaf spring such that the end portion of said inner tray is inserted between a leading end of said presser plate and said outer tray for detachable mounting of said inner tray, and said second vibration dampening material is disposed between the leading end of said presser plate and the end portion of said inner tray.