JPH0315153U

JPH0315153U -

Info

Publication number: JPH0315153U
Application number: JP9384189U
Authority: JP
Priority date: 1988-10-11
Filing date: 1989-08-11
Publication date: 1991-02-15

Description

[Brief explanation of drawings]

第１図は、本考案の一実施例のインクシートカ
セツトの分解斜視図、第２図は、同巻取ロール軸
部分の断面図、第３図は、同供給ロール軸部分の
断面図、第４図は、従来例のインクシートカセツ
トの内部の平面図、第５図は、それぞれインクシ
ート供給ロール軸に対して法線方向に負荷をかけ
る形式のバツクテンシヨン機構の実施例を示す図
、第６図は、本考案の他の実施例の斜視図、第７
図は、同巻取ロール軸のスリツプ機構部の断面図
、第８図は、スリツプ機構部の他の実施例の断面
図、第９図は、供給ロール軸のバツクテンシヨン
機構部の断面図、第１０図は、第６図の実施例に
軸保持板を設けた状態を示す図、第１１図は、同
保持板の形状例を示す図、第１２図は、第６図の
実施例に回動可能な軸保持板を設けた状態を示す
図、第１３図は同保持板の形状例を示す図、第１
４図は、第６図の実施例にスライド可能な軸保持
板を設けた状態を示す図、第１５図は、同保持板
の形状例を示す図、第１６図は、本考案のさらに
他の実施例の斜視図である。１…インクシート、２…インクシート供給ロー
ル軸、３…インクシート巻取ロール軸、４ａ，４
ｂ…ケース、５ａ，５ｂ…ばね、６ａ，６ｂ…プ
レート、７ａ，７ｂ，９…摩擦板、８…駆動力伝
達ギヤ、２２…板ばね、２３…圧縮スプリングば
ね、２４…スプリングばね、２５…コイルばね、
３２，５１…インクシート供給ロール軸、３２ａ
，５１ａ…バツクテンシヨン機構部、３３，５２
…インクシート巻取ロール軸、３３ａ，５２ａ…
スリツプ機構部、３４…キヤツプ、３５…摩擦部
材、３６…軸、３９…圧縮スプリング、４０…プ
レート、４１…駆動力伝達ギヤ。 FIG. 1 is an exploded perspective view of an ink sheet cassette according to an embodiment of the present invention, FIG. 2 is a sectional view of the take-up roll shaft portion, and FIG. 3 is a sectional view of the supply roll shaft portion. FIG. 4 is a plan view of the interior of a conventional ink sheet cassette, and FIG. 5 is a diagram showing an embodiment of a back tension mechanism that applies a load in the normal direction to the ink sheet supply roll shaft. FIG. 6 is a perspective view of another embodiment of the present invention;
8 is a sectional view of another embodiment of the slip mechanism, and FIG. 9 is a sectional view of the back tension mechanism of the supply roll shaft. , FIG. 10 is a diagram showing a state where a shaft holding plate is provided in the embodiment of FIG. 6, FIG. 11 is a diagram showing an example of the shape of the same holding plate, and FIG. 12 is a diagram of the embodiment of FIG. 6. Fig. 13 is a diagram showing an example of the shape of the holding plate;
FIG. 4 is a diagram showing a state in which a slidable shaft holding plate is provided in the embodiment of FIG. 6, FIG. 15 is a diagram showing an example of the shape of the same holding plate, and FIG. FIG. DESCRIPTION OF SYMBOLS 1... Ink sheet, 2... Ink sheet supply roll shaft, 3... Ink sheet take-up roll shaft, 4a, 4
b... Case, 5a, 5b... Spring, 6a, 6b... Plate, 7a, 7b, 9... Friction plate, 8... Drive force transmission gear, 22... Leaf spring, 23... Compression spring spring, 24... Spring spring, 25... coil spring,
32, 51... Ink sheet supply roll shaft, 32a
, 51a... Back tension mechanism section, 33, 52
...Ink sheet take-up roll shaft, 33a, 52a...
Slip mechanism section, 34... Cap, 35... Friction member, 36... Shaft, 39... Compression spring, 40... Plate, 41... Driving force transmission gear.

Claims

[Scope of Claim for Utility Model Registration] (1) An ink sheet supply roll shaft 2 that is used in thermal transfer facsimile machines, thermal transfer printers, etc. to feed out unused ink sheets, and an ink sheet take-up roll shaft that winds up used ink sheets. 3 disposed in cases 4a and 4b, the ink sheet supply roll shaft 2 has a plate 6a pressed against one end thereof by the pressing force of a spring 5a.
and a friction plate 7a provided at the other end that slides into contact with the inner wall of the case due to the pressing force of the spring 5a. Plate 6b pressed by pressing force
and a friction plate 7b provided at the other end that slides into sliding contact with a friction plate 9 provided on the drive transmission means 8 by the pressing force of the spring 5a. (2) an ink sheet supply roll shaft that sends out unused ink sheets, an ink sheet take-up roll shaft that winds up used ink sheets, a back tension mechanism provided on the ink sheet supply roll shaft, and the ink sheet This is an ink sheet cassette in which a slip mechanism provided on a take-up roll shaft is disposed in a case, and the back tension mechanism applies a load in the normal direction to the ink sheet supply roll shaft 2; Members 22, 23, 2 that brake the rotation of the roll shaft
An ink sheet cassette comprising: 4, 25. (3) An ink sheet cassette comprising an ink sheet supply roll shaft 32 for feeding unused ink sheets and an ink sheet take-up roll shaft 33 for winding up used ink sheets, the supply roll shaft 32 and the take-up The roll shaft 33 is
Caps 34 and 34' are both cylindrical in shape and have friction members 35 and 35' on their inner or outer surfaces fixed to one end thereof, and a shaft 36 is inserted rotatably through the caps. a compression spring 39 whose one end is supported by the shaft end; and a compression spring 39 which is non-rotatably but slidably provided with respect to the shaft 36 and is pushed by the compression spring so that the friction member 35
The shaft 3 is pressed against the plate 40, or the friction member 35' provided on the outer surface of the cap 34' whose inner surface is pressed by the compression spring.
In the case of a supply roll shaft, the outer end of the shaft 36 is fixed to the side wall 42 of the main unit or cassette, and the friction surface of the friction member is used as a back tension generating part; An ink sheet cassette characterized in that, in the case of a take-up roll shaft, a driving force transmission gear 41 is attached to the outer end of the shaft, and the friction surface of the friction member serves as a slip portion. (4) An ink sheet cassette comprising an ink sheet supply roll shaft 51 that sends out unused ink sheets, and an ink sheet take-up roll shaft 52 that winds up used ink sheets, the supply roll shaft 51 and the take-up roll shaft being connected to each other. The roll shaft 52 is
Caps 34, 34' having the same structure and facing in opposite directions, each having a cylindrical shape and having friction members 35, 35' fixed to one end thereof on the inner or outer surface, and rotatably passing through the caps. a compression spring 39 whose one end is supported by the inserted shaft end, and the shaft 36
a plate 40 which is slidably but not rotatably provided against the cap and is pressed by the compression spring to press against the friction member 35; or a friction member provided on the outer surface of the cap 34' whose inner surface is pressed by the compression spring; 35' is in pressure contact with the shaft 36, and a gear 41 is fixed to the outer end of the shaft 36. The supply roll shaft generates back tension on the friction surface of the friction member. In the take-up roll shaft,
An ink sheet characterized in that the friction surface of the friction member is a slip portion, and when a used ink sheet is used repeatedly, the positions of a supply roll shaft and a take-up roll shaft are exchanged and set. Cassette.