Screw drive conveying apparatus

Patent metadata

Field	Value
Publication number	US-9382074-B2
Application number	US-201514752349-A
Country	US
Kind code	B2
Filing date	Jun 26, 2015
Priority date	Dec 27, 2012
Publication date	Jul 5, 2016
Grant date	Jul 5, 2016

Abstract

A screw-drive conveying apparatus has on a conveying traveling body side, a first driven roller pair having a shorter distance between two driven front and rear rollers and a second driven roller pair having a longer distance between two driven front and rear rollers. A first screw shaft row with which the respective driven rollers of the first driven roller pair are engaged and a second screw shaft row with which the respective driven rollers of the second driven roller pair are engaged are provided on a traveling path side. The length of screw discontinued spaces between both screw shaft rows is equal to the distance between the driven rollers of the driven roller pair engaged with the screw shaft row on the upstream side.

First claim

What is claimed is:

1. A screw-drive conveying apparatus in which a screw shaft row composed of a plurality of screw shafts concentrically arranged in a line and interlockingly rotating at a constant speed with respect to each other is provided along a traveling path of a conveying traveling body, and two driven front and rear rollers engaged with the screw shafts are provided to the conveying traveling body with a distance corresponding to a length of a screw discontinued space between the screw shafts, characterized in that
as the two driven front and rear rollers, at least two pairs of a first driven roller pair having a shorter distance between the two driven front and rear rollers and a second driven roller pair having a longer distance between the two driven front and rear rollers are provided, displaced in a direction orthogonal to a traveling direction of the conveying traveling body, and
as the screw shaft row, a first screw shaft row with which the respective driven rollers of the first driven roller pair are engaged and a second screw shaft row with which the respective driven rollers of the second driven roller pair are engaged are provided alternately along the traveling path of the conveying traveling body, and
respective screw shafts of the first screw shaft row and respective screw shafts of the second screw shaft row are interlockingly connected at a constant speed with respect to each other, and
a length of screw discontinued spaces between the first and second screw shaft rows in the traveling direction of the conveying traveling body is equal to the distance in the traveling direction of the conveying traveling body between a headmost driven roller of the driven roller pair engaged with the screw shaft row on a downstream side of the traveling path and a rear-side driven roller of the driven roller pair engaged with the screw shaft row on an upstream side of the traveling path.

2. The screw-drive conveying apparatus according to claim 1 , wherein at least one of the first and second screw shaft rows is incorporated with a plurality of different feeding speed screw shafts having a spiral pitch set in a condition of becoming an integer fraction at the distance between the two driven front and rear rollers engaged with this screw shaft row.

3. The screw-drive conveying apparatus according to claim 1 , wherein the first and second screw shaft rows are arranged bilaterally symmetrically with respect to a middle position in a width direction of the conveying traveling body within a space below the conveying traveling body.

4. The screw-drive conveying apparatus according to claim 1 , wherein a screw shaft at an end portion of the first screw shaft row and a screw shaft at an end portion of the second screw shaft row are interlockingly connected to each other by a transmission means composed of universal joints and an obliquely arranged transmission shaft.

5. The screw-drive conveying apparatus according to claim 1 , wherein a headmost driven roller of the first driven roller pair and a headmost driven roller of the second driven roller pair are arranged in parallel in the direction orthogonal to the traveling direction of the conveying traveling body.

6. The screw-drive conveying apparatus according to claim 1 , wherein each driven roller is pivotally supported to a movable body supported to the conveying traveling body by two movable shaft bodies arranged in a line in the traveling direction of the conveying traveling body and being capable of reciprocating perpendicularly to the engaging screw shaft, and a locking means to lock the two movable shaft bodies in an active position that the driven roller is engaged with the screw shaft and in an inactive position that the driven roller is disengaged from the screw shaft is provided.

7. The screw-drive conveying apparatus according to claim 6 , wherein the locking means comprises rotary tables respectively supported to end portions of the movable shaft bodies so as to be rotatable about the movable shaft bodies, handles for rotationally operating the rotary tables, a fixed plate arranged on the conveying traveling body side so as to adjoin the rotary tables and provided with engaged portions, and engaging portions provided around the rotary tables, and the engaging portions are configured to be engaged and disengaged with respect to the engaged portions by rotation of the rotary tables when the driven roller is in the active position and the inactive position.

Assignees

• Nishikawa Hiroshi
• Iba Toshiyuki
• Daifuku Kk

Inventors

• Nishikawa Hiroshi
• Iba Toshiyuki

Classifications

• B65G35/066 Primary

  the bar or the tube being provided with a helical or annular channel · CPC title

• B61B13/12

  Systems with propulsion devices between or alongside the rails, e.g. pneumatic systems (cable traction B61B9/00; car shunting devices B61J) · CPC title