# US 2017/0282937 A1 · Overhead conveyor

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- Number: US 2017/0282937 A1
- Document ID: US20170282937A1
- Status: Published application
- Kind: A1
- Application number: 15/134,964
- Filed: 2016-04-21
- Published: 2017-10-05
- Earliest claimed: 2016-04-04
- Assignees: Sewoong Machinery Co., Ltd.
- Applicants: Sewoong Machinery Co., Ltd.
- Inventors: Eok Sik YOU; Young Kyu SON
- Web page: https://patentgrep.com/patent/US20170282937A1

## CPC

- B61B 3/02: with self-propelled vehicles
- B61B 13/04: Monorail systems
- B61B: RAILWAY SYSTEMS; EQUIPMENT THEREFOR NOT OTHERWISE PROVIDED FOR (lifts or hoists, elevators, escalators, moving walkways B66B)

## Abstract

An overhead conveyor includes a monorail, a driving trolley having a drive wheel rolling along the monorail and a motor driving the drive wheel, a driven trolley disposed to be spaced apart from the driving trolley on the monorail and having a driven wheel rolling along the monorail, a hanger operatively suspended from the monorail, a first friction plate disposed on the hanger, a plurality of first jigs extending towards the first friction plate along the monorail, and a friction drive unit having a friction drive wheel disposed on the first jig so as to convey the first friction plate in a running direction and a drive motor driving the friction drive wheel.

## Claims

### Claim 1

An overhead conveyor comprising:
a monorail (100) disposed on an upper side of a working space;
a driving trolley (210) having a drive wheel (211) rolling along the monorail (100), and a motor (212) driving the drive wheel (211);
a driven trolley (220) disposed to be spaced apart from the driving trolley (210) on the monorail (100) and having a driven wheel (221) rolling along the monorail (100);
a hanger (400) operatively suspended from the monorail (100) through a first frame (214) of the driving trolley (210) and a second frame (224) of the driven trolley (220) so as to carry an object thereon;
a first friction plate (500) disposed on one side of a flat upper end of the hanger (400);
a plurality of first jigs (121) extending from the upper side of the working space towards the first friction plate (500) along the monorail (100); and
a friction drive unit (600) having a friction drive wheel (610) disposed on a lower end of the first jig so as to convey the first friction plate (500) in a running direction and a drive motor (620) driving the friction drive wheel (610),
wherein the hanger (400) is able to be run along the monorail (100) through driving of the driving trolley (210) and/or friction drive unit (600).

### Claim 2 (depends on 1)

The overhead conveyor according to claim 1, wherein the overhead conveyor includes:
a second friction plate (500′) disposed on the other side of the flat upper end of the hanger in such a manner as to be arranged parallel with the first friction plate (500) relative to the monorail (100);
a plurality of second jigs (122) extending from the upper side of the working space towards the second friction plate (500′) along the monorail (100); and
a support wheel (710) disposed on a lower end of the second jig so as to convey the second friction plate (500′) in a running direction.

### Claim 3 (depends on 1)

The overhead conveyor according to claim 1, wherein the driving trolley (210) includes a toggle clamp (213).

### Claim 4 (depends on 1)

The overhead conveyor according to claim 1, wherein the friction drive unit (600) includes a displacement means displacing the friction drive wheel (610).

### Claim 5 (depends on 2)

The overhead conveyor according to claim 2, wherein the support wheel (710) includes a displacement means displacing the support wheel.

### Claim 6 (depends on 2)

The overhead conveyor according to claim 2, wherein the friction plate (500, 500′) has a plane part (511) and downwardly-inclined surfaces (512) on opposite ends of the plane part.

### Claim 7 (depends on 6)

The overhead conveyor according to claim 6, wherein the plane part of the friction plate (500, 500′) extends longer than a distance between two adjacent friction drive wheels (610) or support wheels (710).