Winding device and method for designing winding device

Patent metadata

Field	Value
Publication number	US-10017348-B2
Application number	US-201514928002-A
Country	US
Kind code	B2
Filing date	Oct 30, 2015
Priority date	Dec 19, 2014
Publication date	Jul 10, 2018
Grant date	Jul 10, 2018

Abstract

Provided is a winding device capable of speeding up a winding operation while ensuring a winding quality. A feed roller feeds a sheet-like member. A take-up roller takes up the sheet-like member. Each roller guides transportation of the sheet-like member between the feed roller and the take-up roller. A sum of moments of inertia of each free roller is determined so that a variation in a tension applied to the sheet-like member is equal to or less than 16.7 [N/m].

First claim

What is claimed is:

1. A winding device comprising:
a feed roller that feeds a member to be wound;
a take-up roller that takes up the member to be wound; and
one or more rollers that guide transportation of the member to be wound between the feed roller and the take-up roller,
wherein a moment of inertia of the one or more rollers satisfies the following Expression (1) so that a variation ΔT in a tension applied to the member to be wound when a take-up rate of the member to be wound varies is equal to or less than 16.7 [N/m],

Δ
⁢

⁢
T

=

∑

i
=
1

N

⁢

(

IM
i

·
Δ

⁢

⁢
ω

r
i

+

RR
i

)

W

≤
16.7

(
1
)

where N represents the number of the one or more rollers; Δω represents a maximum value of an angular acceleration of the one or more rollers; IM i represents a moment of inertia of an i (i is an integer that satisfies 1≤i≤N)-th roller of the one or more rollers; r i represents a radius of the i-th roller of the one or more rollers; RR i represents a rolling resistance of the i-th roller of the one or more rollers; and W represents a width of the member to be wound.

2. The winding device according to claim 1 , further comprising a dancer that adjusts a tension of the member to be wound between the feed roller and the take-up roller, wherein
the moment of inertia of at least one of the one or more rollers that is provided between the dancer and the feed roller satisfies the Expression (1), and
the moment of inertia of at least one of the one or more rollers that is provided between the dancer and the take-up roller satisfies the Expression (1).

3. The winding device according to claim 1 , wherein
the one or more rollers have the same moment of inertia, the same radius, and the same rolling resistance, and
a moment of inertia IM of the one or more rollers satisfies the following Expression (2):

IM
≤

r

Δ
⁢

⁢
ω

⁢

(

16.7
·
W

N

-
RR

)

(
2
)

where r represents a radius of the one or more rollers, and RR represents a rolling resistance of the one or more rollers.

4. The winding device according to claim 3 , wherein when the maximum value Δω of acceleration/deceleration of winding is 718.7 [rad/s 2 ]; the rolling resistance RR of the roller is 0.0049 [N]; the radius r of the roller is 0.015 [m]; and the width W of the member to be wound is 0.12 [m], a sum N·IM of moments of inertia of the one or more rollers is equal to or less than 4.16×10 −5 [kg·m 2 ].

5. A method for designing a winding device, comprising:
disposing a feed roller that feeds a member to be wound;
disposing a take-up roller that takes up the member to be wound;
disposing one or more rollers that guide transportation of the member to be wound between the feed roller and the take-up roller; and
selecting the one or more rollers so that a variation ΔT in a tension applied to the member to be wound when a take-up rate of the member to be wound varies is equal to or less than 16.7 [N/m] and a moment of inertia of the one or more rollers satisfies the following Expression (3):

Δ
⁢

⁢
T

=

∑

i
=
1

N

⁢

(

IM
i

·
Δ

⁢

⁢
ω

Assignees

• Toyota Motor Co Ltd

Inventors

• Ohashi Fuminori

Classifications

• B65H2801/72

  Fuel cell manufacture · CPC title

• B65H2515/31

  Tensile forces · CPC title

• B65H23/1888

  and controlling web tension · CPC title

• B65H23/1806

  in reel-to-reel type web winding and unwinding mechanism, e.g. mechanism acting on web-roll spindle · CPC title

• B65H23/16

  by weighted or spring-pressed movable bars or rollers · CPC title