Login| Sign Up| Help| Contact|

Patent Searching and Data


Title:
PIERCING DEVICE
Document Type and Number:
WIPO Patent Application WO/2005/044527
Kind Code:
A1
Abstract:
A piercing device (1) where an outer tube (2), which is driven and rotated, is supported by a bearing on one (X1) of axes positioned eccentrically from each other and where piercing needles (33) are independently and rotatably arranged in the outer tube (2), on the other axis (X2), the piercing needles (33) being spaced apart in the circumferential direction and projecting outward in the radial direction. Each of the piercing needles (33) is able to move out from and come into the outer- tube surface through a through-hole (5) formed in the outer tube (2). Needle-restraining members (36a-36f) for transmitting rotational force to the piercing needles (33) by being driven and rotated are supported by bearings. Each of the piercing needles (33) is supported on the other axis (X2) through the needle-restraining members (36a-36f). Other piercing needles (33) integrally rotating with the first-mentioned piercing needles (33) are fixed on the needle-restraining members (36a-36f), arranged side by side in the axial direction. This structure prevents unreasonable force from acting on the piercing needles, and is able to sufficiently prevent unnecessary expansion of pierced holes, deformation of a rubber sheet, etc. Further, in the entry and retreat of the piercing needles into the rubber sheet, the holes formed in the rubber sheet are not expanded, and a large number of small holes can be arranged in the axial direction.

Inventors:
SUDA NOBUYUKI (JP)
Application Number:
PCT/JP2004/016240
Publication Date:
May 19, 2005
Filing Date:
November 01, 2004
Export Citation:
Click for automatic bibliography generation   Help
Assignee:
BRIDGESTONE CORP (JP)
SUDA NOBUYUKI (JP)
International Classes:
B26F1/24; (IPC1-7): B26F1/24
Foreign References:
JPS488368A
Other References:
See also references of EP 1683615A4
None
Attorney, Agent or Firm:
Sugimura, Kosaku (2-4 Kasumigaseki 3-chome, Chiyoda-k, Tokyo 13, JP)
Download PDF:



 
Previous Patent: FORMING DEVICE

Next Patent: MULTIPLE FINISH SPINDLE