公开(公告)号：EP4467688A1

公开(公告)日：2024-11-27

申请号：EP23774970.0

申请日：2023-03-22

Applicant: NHK Spring Co., Ltd.

Inventor： NOZAWA, Takahiro ,  KUROKAWA, Tomoya ,  DOI, Takashi

IPC: C25D17/08

Abstract: A surface treatment jig according to the present invention is a surface treatment jig for performing surface treatment of an exterior body of an accumulator including a bottom, a shell and a port in a state where the surface treatment jig is connected to the exterior body and supports the exterior body includes: a support portion configured to support the accumulator; and a hook portion connected with the support portion. The support portion has a shape tapered near the hook portion.

公开(公告)号：EP4464900A1

公开(公告)日：2024-11-20

申请号：EP23740232.6

申请日：2023-01-06

Applicant: NHK Spring Co., Ltd.

Inventor： NAKANO, Naohito ,  OHTA, Daijiro ,  TSUJINO, Akira ,  KUROKAWA, Tomoya

IPC: F15B1/16 ,  B23K9/00

Abstract: A manufacturing method according to the present invention is a manufacturing method for manufacturing an exterior body of an accumulator including a bottom, a shell, and a port, the method including press fitting the bottom into the shell and melting and solidifying a region including a part of a connection portion that has been press fitted. This manufacturing method makes it possible to obtain an exterior body of an accumulator capable of suppressing detachment of the connection portion at the time of conveyance and a decrease in fatigue strength of the exterior body after joining.

公开(公告)号：EP4474657A1

公开(公告)日：2024-12-11

申请号：EP23746834.3

申请日：2023-01-20

Applicant: NHK Spring Co., Ltd.

Inventor： NAKANO, Naohito ,  OHTA, Daijiro ,  DOI, Takashi ,  KUROKAWA, Tomoya

IPC: F15B1/16 ,  C23C22/12

Abstract: A cap bellows assembly according to the present invention is a cap bellows assembly that seals one end of a bellows provided inside an exterior body of an accumulator, the accumulator including a bottom, a shell, and a port, the cap bellows assembly including a cap body that covers an opening of the bellows, and a cap elastic portion provided between the cap body and the port and fixed to the cap body, wherein in the cap body, a bonding surface to which the cap elastic portion is bonded is subjected to a zinc calcium phosphate treatment, and a hopeite amount on the bonding surface is 4.8% or less.

公开(公告)号：EP4497953A1

公开(公告)日：2025-01-29

申请号：EP23774969.2

申请日：2023-03-22

Applicant: NHK Spring Co., Ltd.

Inventor： KUROKAWA, Tomoya ,  NAKANO, Naohito

IPC: F15B1/14 ,  F16J3/04 ,  F16J15/52

Abstract: An accumulator according to the present invention is an accumulator including: an exterior body including a bottom, a shell and a port; and a bellows provided inside the exterior body and having an S-shape being capable of expansion and contraction. In a case where the bellows has expanded maximally in the accumulator, the bellows has been expanded from a free state where no load other than gravitational force is being applied to the bellows.