JPS6141331Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a scanning device that moves back and forth, such as a reading head and a recording head in image reading, printing and recording, etc., and particularly relates to an electrical lead wire arrangement structure of the scanning device.

Scanning devices such as reading heads and recording heads are mainly used in facsimile machines, printers, copying machines, and the like. As an example, the main components of a plane scanning type copying machine are shown in FIG.

In FIG. 1, 1 is a document, 2 is a transparent contact plate, 3 is a guide bar, 4 is a reading head, 5 is a recording head, 6 is an idle roller, 7 is a drive roller,
8 is a wire, 9 is a guide bar, 10 is a recording sheet,
11 is a recording sheet mounting plate. By the forward and reverse rotation of the drive roller 7, the reading head 4 and the recording head 5 are synchronously driven back and forth in opposite directions by the wire 8.
This is main scanning drive. The guide bars 3, 9, reading head 4, recording head 5, idle roller 6, drive roller 7 and wire are attached to a holding frame (not shown).
It is held integrally with the paper and reciprocated in a direction perpendicular to the plane of the paper. This is sub-scanning drive.

Also, check the recording operation, maintain the recording head 5,
In order to facilitate inspection and adjustment, the recording head 5 and the reading head 4 are provided as shown in FIG.
There is also a structure in which the recording sheet mounting plate 11 and the light-transmitting contact plate 2 are respectively arranged outside.
In FIG. 2, 12 to 14 are idle rollers.

In such a plane scanning type copying device, since the reading head 4 and the recording head 5 move in the main scanning direction and in the sub-scanning direction, the electric lead wires such as the power supply line, the read signal output line, and the recording signal input line to these also move in the same manner. Since the movement is two-dimensional, it is particularly difficult to arrange electrical leads. Generally, when scanning is performed at high speed in a scanning device, the electrical lead wire becomes a load on the scanning device and puts a burden on the scanning drive system. Also, if the electrical lead wire is a flexible cord, the load will be reduced, but
The flexible cord often bends during the backward scanning process and gets caught in or collides with surrounding mechanical systems, resulting in failure.

An object of the present invention is to facilitate the arrangement of electrical lead wires and to provide an electrical lead wire arrangement structure that can withstand high-speed scanning and does not impede high-speed scanning.

FIG. 3 shows one embodiment of the present invention. In FIG. 3, 15 and 16 are holding frames that hold the idle roller 6 and the drive roller 7, respectively, 17 is an idle roller shaft, and 18 is a drive roller shaft.
The idle roller 6 and the drive roller 7 are connected to an idle roller shaft 17 and a drive roller shaft 18, respectively.
A pulley 19 is fixed to the drive roller shaft 18, and this pulley 19 is driven in forward and reverse directions by a motor 21 via a wire 20. As a result, the reading head 4 and recording head 5 are reciprocated in opposite directions via the wire 8 (main scanning drive). The roller holding frames 15 and 16 are connected by guide bars 3 and 9, and the roller holding frame 16 is reciprocated by a motor 25 via a wire 22 and idle rollers 23 and 24. (Sub-scan drive). At this time, the roller holding frames 15 and 16 are
They move along the idle roller axis 17 and the drive roller axis 18, respectively.

26 ₁ and 26 ₂ are flat cables used as electrical lead wires for the recording head 5. 26 ₁ indicates the end on the power supply side, and 26 ₂ indicates the end on the recording head side. These ends 26 ₁ , 26 ₂ are continuous, and their middle portion lies within the storage box 28 . Similarly, 27 ₁ and 27 ₂ are flat cables used as electrical leads for the reading head 4;
₁ indicates the end on the power supply side, and ₂₇₂ indicates the end on the reading head side. These ends 27 ₁ , 27 ₂ are continuous, and their middle portion lies within the storage box 28 .

FIG. 4 shows an enlarged side view of the holding frame 16 viewed from the direction of arrow AR shown in FIG. 3. The driving roller 7 is formed with collars 7a and 7b in addition to the groove in which the wire 8 is wound.
It is a rotating member. Rubber rollers 29, 30 are installed in a relationship that faces each collar 7a, 7b and presses down the flat cable end portions ₂₆₂ , ₂₇₂ . These rubber rollers 29 and 30 are the second rotating member of the present invention. As mentioned above, the drive roller 7 is rotated forward and backward by the motor 21 via the drive roller shaft 18, pulley 19 and wire 20, and thereby the reading head 4 and recording head 5 are scanned and reciprocated via the wire 8. At this time, the flat cable ends 26 ₂ and 27 ₂ are similarly driven back and forth in synchronization with the main scanning. Therefore, the flat cable ends 26 ₂ and 27 ₂ smoothly follow the main scanning reciprocating motion of the recording head 5 and the reading head 4 without tension or slack, and no extra load is applied to the wire 8. . In addition, the recording surface is free from stains caused by slack in the flat cable, and deformation and damage due to bending of the flat cable are eliminated.

By storing the flat cable length necessary for main scanning movement in the storage box 28, when the flat cable ends 26 ₂ and 27 ₂ are pulled out by the storage box 28, it is not necessary to send them out. There is. However, when feeding the flat cable into the storage box 28, it becomes slack, so it is necessary to drive the flat cable. In such a case, as shown in FIG.
2, for example flat cable end 2
When pulling out the cable ₆₂ from the storage box 28 (outward stroke), the electromagnet 31 is energized to pull up the rubber roller 29, allowing the flat cable end ₂₆₂ to run freely.
When pulling in the flat cable end ₂₆₂ (return stroke), the electromagnet 31 is deenergized and the rubber roller 29
It is also possible to forcefully drive the flat cable end ₂₆₂ by rotating the collar 7a by pressing down.

As the electric lead wire, in addition to using the flat cable as described above, flexible cords and various other cords can be used. In addition,
In the above embodiment, the main scanning drive motor 21 is used as the motor, but a motor separate from this motor is installed, and a drive roller separate from the drive roller 7 is driven by that motor in synchronization with the main scanning drive. It is also possible to drive in the reverse direction, or only in one direction. (When using electromagnets 31 and 32).

As explained above, according to the present invention, the electric lead wire is driven by the first and second rotating members and the motor, so that the electric lead wire is not sagged or subjected to tensile force, and scanning is performed smoothly. It becomes smooth and high-speed scanning becomes possible.

[Brief explanation of the drawing]

FIGS. 1 and 2 are front views showing the main structure of a plane scanning type copying apparatus. FIG. 3 is a perspective view showing one embodiment of the present invention, and FIG. 4 is a side view showing an enlarged part of the same. FIG. 5 is a side view showing another embodiment of the present invention. Note that the same reference numerals in the figures indicate the same or corresponding parts. 1: Original, 2: Transparent contact plate, 3, 9: Guide bar, 4: Reading head (driven object), 5: Recording head, (driven object) 6, 12 to 14, 23, 2
4: Idle roller, 7: Drive roller (rotating body), 7a, 7b: Collar (first rotating member),
8: Wire (flexible elongated body), 20, 22: Wire, 10: Recording sheet, 11: Recording sheet mounting plate, 15, 16: Holding frame, 17: Idle roller shaft, 18: Drive roller shaft, 19 :Pulley, 21,
25: Motor, 26 ₁ , 26 ₂ , 27 ₁ , 27
₂ : Flat cable (electrical lead wire), 28:
Storage box, 29, 30: Rubber roller (second rotating member), 31, 32: Electromagnet, (18, 19, 20,
21: Driving means).

Claims (1)

[Claims for Utility Model Registration] A flexible elongated body coupled to a driven body, a rotating body coupled to and supporting the flexible elongated body, and a drive means for reciprocating the flexible elongated body. , in a scanning device that reciprocates a driven body via a flexible elongated body: a first rotating member integral with the rotating body; and
A second rotating member that faces the first rotating member via an electrical lead wire connected to the driven body and presses the electrical lead wire against the first rotating member. Electric lead wire arrangement structure.