Title:
SHEET FOLDING DEVICE AND SUCTION SWITCHING UNIT
Document Type and Number:
WIPO Patent Application WO/2023/008494
Kind Code:
A1
Abstract:
[Problem] To provide a sheet folding device and a suction switching unit with which a suction hole can be appropriately switched between a suction state and a non-suction state according to the size and shape of a sheet. [Solution] The present invention comprises: a suction plate having a plurality of suction holes that suction and hold a sheet; and a suction switching unit having a plurality of ports that are individually connected so as to correspond to the plurality of suction holes. The suction switching unit includes: a cylinder body having a sliding region; a pair of pistons disposed opposing each other; a cylinder body having a plurality of communication spaces that establish communication between the plurality of ports and the sliding region; a pair of movement units that individually move the pair of pistons along the axial direction; and an exhaust unit that exhausts an opposed space which is defined by the pair of pistons. The plurality of communication spaces are disposed spaced apart from each other along the axial direction, and when the pair of pistons are moved individually, the opposed space selectively communicates with one or more adjacent communication spaces among the plurality of communication spaces.
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Inventors:
YOROZU HIDEKI (JP)
OIWA HIDEKI (JP)
OIWA HIDEKI (JP)
Application Number:
PCT/JP2022/028999
Publication Date:
February 02, 2023
Filing Date:
July 27, 2022
Export Citation:
Assignee:
DUPLO SEIKO CORP (JP)
International Classes:
B65H45/04
Foreign References:
| JPH04505907A | 1992-10-15 | |||
| JP2020019637A | 2020-02-06 | |||
| JPS4914812B1 | 1974-04-10 |
Attorney, Agent or Firm:
HIGASHIYAMA, Kaori (JP)
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