Title:
昇降黒板装置
Document Type and Number:
Japanese Patent JP6947415
Kind Code:
B2
Abstract:
To provide a lifting/lowering blackboard device that makes it possible to perform right and left level adjustment work on a blackboard simply, easily, and safely.SOLUTION: A lifting/lowering blackboard device comprises: a fixed frame body that holds a blackboard so that the blackboard can be lifted/lowered; a drum 6 provided on the fixed frame body; a pair of blackboard rope bodies 7, 8 having one ends fastened on the outer periphery of the drum 6 and the other ends 7a, 8a fitted and fixed on the lower part of the blackboard; a pulley 11 for keeping a state of tension of the blackboard rope body 8 of the pair of blackboard rope bodies 7, 8 that is longer than the blackboard rope body 7; and position adjustment means (support plate 12, movement adjustment means 13) capable of adjusting the position of the pulley 11.SELECTED DRAWING: Figure 1
Inventors:
Ryuichi Kurahashi
Application Number:
JP2019019435A
Publication Date:
October 13, 2021
Filing Date:
February 06, 2019
Export Citation:
Assignee:
Aoi Blackboard Manufacturing Co., Ltd.
International Classes:
A47B97/06; B43L1/04
Domestic Patent References:
| JP2003070582A | ||||
| JP52046941A | ||||
| JP9196133A | ||||
| JP2014145394A | ||||
| JP3108952U |
Foreign References:
| US3269035 |
Attorney, Agent or Firm:
Hiroshi Masaki
Yuko Mikami
Yuko Mikami