JPH0553356U - Scanner release mechanism - Google Patents

Abstract

(57) [Abstract] [Purpose] To realize a paper release mechanism of a scanner unit which facilitates release of an original when the contact type image sensor is attached to a flexibly deformed bracket with a leaf spring leg and elastically contacts the feed roller. [Structure] Bracket 1 having leaf spring legs 2 and 2 on both sides
In the scanner unit, the contact-type image sensor 3 mounted on the feed roller 4 is intervened between the feed roller 4 and the supporting member 5 at the opposing position while the leaf spring legs 2 and 2 are being bent. , The feed roller 4
A retracting mechanism 20 for retracting from the contact position with the contact image sensor 3 by operating the release lever 22 is provided.

Description

[Detailed description of the device]

[0001]

[Industrial application]

 The present invention relates to a paper releasing mechanism provided in a scanner unit of a facsimile machine or the like.

[0002]

[Prior Art]

 As shown in FIG. 3, as an attachment structure of the contact type image sensor mounted on the scanner unit of the small facsimile machine, as shown in FIG. 3, the original P is placed on the bracket 1 on which the leaf spring legs 2 and 2 are integrally projected. A contact type (complete contact type) image sensor 3 having a flat plate structure directly attached to the reading surface is attached, and the sensor mounting bracket 1 is placed at a position facing the feed roller 4 while bending the leaf spring legs 2 and 2. There is one in which the contact type image sensor 3 on the bracket 1 is elastically brought into contact with the feed roller 4 by intervening between the support member (main frame) 5 arranged.

With this improved sensor mounting structure, the necessary parts are integrated into two parts, the bracket 1 with the leaf spring legs 2 and 2, and the contact image sensor 3 mounted on the bracket 1. The number of points can be reduced, and the assembling work bends the leaf spring legs 2 and 2 integrated with the bracket 1 while the feed roller 4 and the supporting member 5 at the opposing position intervene, so that the leaf spring legs can be assembled. It suffices to engage slits (not shown) cut out at both ends of 2 and 2 with stoppers 6, 6 protruding from the support member 5, without requiring complicated fixing means such as conventional screwing. It will bring convenience such as being able to do it with one touch.

[0004]

[Problems to be solved by the device]

 However, when this type of sensor mounting structure is adopted, as a new problem to be dealt with, the document P is fed between the feed roller 4 and the contact type image sensor 3 as shown by the solid line in FIG. If a paper feed trouble such as a jam occurs when the paper is jammed, the contact image sensor 3 is biased to the feed roller 4 by the spring action of the leaf spring legs 2 and 2 integrated with the bracket 1. Therefore, it may be difficult to release the paper to remove the document P nipped between the sensors and the rollers.

Therefore, as a countermeasure against a document jam, etc., the contact type image sensor 3 and the feed roller 4 are separated from each other to release the contact state between the two, and then the feeding document P is pulled out. A paper release mechanism is required.

The present invention focuses on such a problem, and devises so that the feed roller can be retracted to the separated position if necessary for the contact type image sensor attached using the bracket with the leaf spring leg described above. We propose a paper release mechanism for the scanner section.

[0007]

[Means for Solving the Problems]

 As a means for achieving the above object, the present invention provides a contact type image sensor mounted on a bracket having leaf spring legs on both sides to support a feed roller at a position facing the feed roller while the leaf spring legs are not bent. In the scanner section that intervenes between the member and the member to elastically contact the feed roller, a retracting mechanism is arranged to retract the feed roller from the contact position with the contact-type image sensor by lever operation.

[0008]

[Action]

 With such a retracting mechanism, in the event of a paper jam or other paper feeding trouble, the feed roller can be retracted from the contact position with the contact image sensor by lever operation, so that the paper can be removed to release the paper. Can be done easily.

[0009]

【Example】

 Examples will be illustrated and described below.

1 and 2 show an embodiment of a paper releasing mechanism according to the present invention. In each drawing, reference numeral 10 denotes a side frame (chassis) attached to the inner surface of the side cover of the facsimile apparatus, which is usually integrally formed into a predetermined frame shape by a sheet metal press.

A roller shaft 4 a of the feed roller 4 is mounted on the side frame 10 at a front portion where a scanner unit is assembled, and is hung on a bearing 11 so that the feed roller is attached to an outer end of the roller shaft 4 a. A feed gear 12 for inputting rotational power is fixed to No. 4. On the other hand, a stepping motor 13 that drives the feed roller 4 is attached to the rear portion of the side frame 10, and a motor gear 14 is fixed to the outer end of the motor shaft 13a. The motor gear 14 and the feed gear 12 are meshed with each other via idler gears 15, 16, 17, 18 and idler gear 19 which are disposed between the motor gear 14 and are rotatably supported by the side frame 10, respectively. The rotation of the stepping motor 13 is transmitted to the feed roller 4 at a predetermined reduction ratio.

The side frame 10 is provided with a retracting mechanism 20 for retracting the feed roller 4 from a contact position with a close-fitting image sensor (not shown) by operating a lever.

Specifically, the retracting mechanism 20 inserts the roller shaft 4 a of the feed roller 4 together with the bearing 11 into a long hole 21 that is opened in an arc shape in the side frame 10, and further, The support shaft (pin) 19a of the idler gear 19 and the mounting end 22a that are directly meshed with each other are passed through the middle portion of the release lever 22 that is coaxially supported, and the release lever 22 is pulled up or pushed down. The feed roller 4 is attached so as to be vertically movable along the long hole 21. Reference numeral 23 denotes a leaf spring attached in a V shape on the inner surface side above the front end of the side frame 10. The intermediate bent portion is elastically contacted with the roller shaft 4a of the feed roller 4, and the bent portion is considered. , It serves to stably hold the release lever 22 in the release OFF position shown by the solid line in the figure and the release ON position shown by the chain double-dashed line in the figure.

FIG. 3 also shows an attached state of the release lever 22 of the retracting mechanism 20 and an outline of the movement operation of the feed roller 4 corresponding to the lever operation. That is, if this mechanism 20 is adopted, when a jam or the like occurs while the document P is nipped between the contact type image sensor 3 and the feed roller 4, the release lever extended to the outer surface of the apparatus. When 22 is pulled up, the feed roller 4 retreats upward from the contact position with the contact image sensor 3 and a gap is formed between the two, and in this state paper removal work such as document removal can be easily performed and released. After that, when the lever 22 is pushed back to its original position, the working and assembled state is immediately restored.

Further, in the case of the retracting mechanism 20 of this embodiment, since the swing fulcrum of the release lever 22 is attached concentrically with the idler gear 19, when the feed roller 4 is retracted or returned by the lever operation, the feed gear 4 is retracted. Even if 12 revolves around the idler gear 19 while keeping meshing with the idler gear 19 and the feed roller 4 moves, the feed gear 12 does not repeat unnecessary connection and disconnection with the transmission gear 19 each time. Is characteristic.

As a comparison with the paper release mechanism according to the present invention, a mechanism for retracting the sensor mounting bracket 1 to the separated position while the feed roller 4 is fixed can be considered. However, in that case, since the bracket 1 with the leaf spring legs has a considerably large bending allowance, not only the retracting mechanism becomes complicated but also the retracting operation space must be increased. It can be said that the feed roller moving type is more advantageous.

[0017]

[Effect of the device]

 As described above, when the paper releasing mechanism of the present invention is installed, when the means for mounting the contact type image sensor adopts a means for elastically deforming and mounting the bracket with the leaf spring leg, the retraction in the scanner section is proposed. It solves the problem that it becomes difficult to release the original, and realizes a mechanism that allows the paper to be released easily by operating the lever.

[Brief description of drawings]

FIG. 1 is a side view of a side frame showing an embodiment of a paper releasing mechanism.

FIG. 2 is a plan view of FIG.

FIG. 3 is a cross-sectional view of a scanner unit in a facsimile apparatus, which shows an outline of a sensor mounting structure using a bracket with leaf spring legs and an outline of a retracting operation of a feed roller by lever operation.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bracket 2 Leaf spring leg 3 Contact image sensor 4 Feed roller 4a Roller shaft 5 Support member (main body frame) 6 Stopper 10 Side frame (chassis) 11 Bearing 12 Feed gear 13 Stepping motor 13a Motor shaft 14 Motor gear 15, 16, 17 , 18 idler gear 19 idler gear 19a support shaft (pin) 20 retracting mechanism 21 long hole 22 release lever 22a mounting end 23 leaf spring P original

Claims (1)

[Scope of utility model registration request] 1. A contact type image sensor mounted on a bracket having leaf spring legs on both sides is interposed between the feed roller and a support member at an opposing position while the leaf spring leg is bent, and the contact image sensor is attached to the feed roller. A paper releasing mechanism for the scanner unit, characterized in that a retracting mechanism for retracting the feed roller from the contact position with the contact type image sensor by lever operation is provided in the scanner unit for elastic contact.