JP2021172486A5

JP2021172486A5 - winding body

Info

Publication number: JP2021172486A5
Application number: JP2020077411A
Authority: JP
Filing date: 2020-04-24
Publication date: 2023-05-01
Anticipated expiration: 2040-04-24

Claims

A wound body configured by winding a long sheet ,
a core formed in a cylindrical shape;
and the sheet wound around the outer periphery of the core ,
The core has a cylindrical inner periphery and has one end and the other end,
In the inner peripheral portion of the core body,
a one-end-side first recess that is provided at the position of the one end of the core and is recessed radially outward;
a first recess on the other end side provided at the position of the other end of the core body and recessed radially outward;
It is provided from the position of the one end of the core body to the position of the other end of the core body, is recessed radially outward, and is compared to the first recess on the one end side and the first recess on the other end side. a second recess having a small radially outward recess amount with respect to the inner peripheral portion of the core body ;
The core body can be mounted on the outer periphery of a rotatably provided support shaft from the one end side of the core body or the other end side of the core body,
The core body is
In a state of being attached to the outer periphery of the support shaft , the first protrusion on the one end side or the first recess on the other end side is a first projection provided at the position of the base end of the support shaft. By fitting into , it is possible to rotate integrally with the support shaft,
When mounted on the outer circumference of the support shaft , the second recess is engaged with a second protrusion provided at the tip of the support shaft, thereby forming a contact between the first protrusion and the second protrusion. , the wound body configured such that the one end side first recess or the other end side first recess is aligned in the circumferential direction of the support shaft .

2. The winding according to claim 1, wherein the second recess is formed over the entire circumference of the core in the circumferential direction at the position of the one end of the core and the position of the other end of the core. round body.

The second recess is
a one-end-side guiding portion that guides the second protrusion when the core is attached to the outer periphery of the support shaft from the one-end side of the core;
a second end side guide portion that guides the second projection when the core body is mounted from the other end side of the core body on the outer periphery of the support shaft;
The one-end-side guide portion and the other-end-side guide portion are configured to be connected to the first protrusion, the first recess on the one-end side, or the other end when the core body is attached to the outer circumference of the support shaft. 3. The wound body according to claim 1, wherein said second protrusion is guided so that said second protrusion is aligned with said first concave section on said side in the circumferential direction of said support shaft .

The one end side guide portion is provided at a position near the one end of the core body,
The wound body according to claim 3, wherein the other-end-side guide portion is provided at a position near the other end of the core body.

The second recess includes a guide portion that guides the second protrusion,
The guide section
provided between the one end side guide portion and the other end side guide portion,
When the core body is attached to the outer circumference of the support shaft, the first protrusion and the first recess on the one end side or the first recess on the other end side are aligned in the circumferential direction of the support shaft . 4. The wound body according to claim 3, wherein the second protrusion is guided so that the rolled state is maintained.

When the core body is attached to the outer circumference of the support shaft, the guide portion is configured such that the first projection portion and the first concave portion on the one end side or the first concave portion on the other end side are aligned with the support shaft . In order to maintain the aligned state in the circumferential direction, an intermediate position between the base end of the support shaft and the distal end of the support shaft is provided with the same protrusion as the second projection in the circumferential direction of the support shaft. 6. The wound body according to claim 5, which guides the third protrusion provided at the position of .