JPH045762U

JPH045762U -

Info

Publication number: JPH045762U
Application number: JP4714690U
Authority: JP
Priority date: 1990-05-02
Filing date: 1990-05-02
Publication date: 1992-01-20

Description

[Brief explanation of the drawing]

第１図は本考案の実施例のワイヤ駆動系の全体
を示す斜視図、第２図はその右プーリ用ブラケツ
トの分解斜視図、第３図はワイヤ位置合せ指標の
一例を示す平面図、第４図は本考案が適用される
原稿読取装置の構成の一例を示す側断面図、第５
図は従来のワイヤ駆動系の一例を示す斜視図であ
る。４……キヤリツジ、１０，１２……右側プーリ
、１１，１３……左側プーリ、１５……モータプ
ーリ、１６，１７……ワイヤ、２０……ブラケツ
ト、２１……スプリング、２３……固定垂直軸、
２８……ピン（機枠に固定された部材）、３２…
…調整ねじ（軸支位置調整手段）、４０……突片
（指標）。 Fig. 1 is a perspective view showing the entire wire drive system according to the embodiment of the present invention, Fig. 2 is an exploded perspective view of the bracket for the right pulley, Fig. 3 is a plan view showing an example of a wire positioning index, 4 is a side sectional view showing an example of the configuration of a document reading device to which the present invention is applied;
The figure is a perspective view showing an example of a conventional wire drive system. 4... Carriage, 10, 12... Right pulley, 11, 13... Left pulley, 15... Motor pulley, 16, 17... Wire, 20... Bracket, 21... Spring, 23... Fixed vertical shaft,
28...pin (member fixed to the machine frame), 32...
...adjustment screw (spindle position adjustment means), 40... protrusion (index).

Claims

[Claims for Utility Model Registration] It has four pulleys symmetrical about a center line extending in the scanning direction in front and back of the scanning direction, both ends of which are fixed to a motor pulley driven by a motor, one of which is attached to one side of the scanning direction. Two drive wires are wound around two pulleys, the other is wound around four pulleys, and tension is applied to each pulley by a spring. In the drive wire tension adjustment mechanism of the document reading device that reads and scans a document by a reading means carried on a fixed carriage, the pulleys provided on both sides of one end in the scanning direction are connected to the main body frame of the device, respectively. The spring that applies tension to the above wire is supported at a position offset from the center of swing of the bracket, which is swingably supported around a fixed vertical axis.
The springs are tensioned between a member fixed to the machine frame and the free end of the bracket, and when these springs reach a length that generates a tension capable of applying a predetermined tension to the wire, A mark is provided on the machine frame whose tip edge coincides with the outer line of the wire stretched between two pulleys that are pivotally supported by respective brackets at the position,
A drive wire tension adjustment mechanism characterized by having a means for adjusting the shaft support position of two pulleys.