JPH0740957U - Document pressure plate opening / closing device - Google Patents

Abstract

(57) [Summary] [Purpose] To enable the user to adjust the opening and closing angle of the original pressure plate to the angle that is most convenient for the user to open and close. [Structure] A support frame 2 attached to a copying machine main body 1,
The manuscript pressure plate 3 is mounted on the manuscript pressure plate 3, and the base end portion thereof is pivotally supported by the support frame 2, and the manuscript pressure plate 3 is inserted between the two frames 2 and 4 to open the manuscript pressure plate 3 in the opening direction. Biasing spring 1
4 and an opening / closing angle adjusting tool 6 for adjusting the opening / closing angle of the original pressure plate 3 between both frames 2 and 4, and the main body 6a of the opening / closing angle adjusting tool 6 is slidable on the support frame 2. The tip end 6c is fixed and the rear end edge 4a of the rotating frame 4 is fixed.
The opening / closing angle adjusting tool 6 is slid to change the contact position between the tip portion 6c and the rotating frame 4 so that the opening / closing angle of the original pressure plate 3 can be adjusted. I am configuring.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a document pressure plate opening / closing device capable of finely adjusting an opening / closing angle of a document pressure plate of a copying machine or the like.

[0002]

[Prior art]

 Conventionally, an example of this type of document pressure plate opening / closing device is disclosed in Japanese Utility Model Publication No. 4-11109. This is provided with a support frame attached to the main body of a copying machine, a rotary frame attached to the original pressure plate, the base end portion of which is pivotally supported by the support frame, and the front side between the two frames. Therefore, an opening / closing angle restricting device for narrowing the opening / closing angle of the original pressure plate is detachably attached to the rear side between the frames. There is.

[0003]

[Problems to be solved by the device]

 In the conventional document crimping plate opening / closing device, the opening / closing angle of the document crimping plate is set to, for example, 90 ° for convenience of maintenance. This often causes the opening and closing angle of the original pressure plate to be unnecessarily large, which forces the user to perform unnecessary arm movements. Therefore, it was considered that the opening / closing angle of the original pressure plate could be freely set from the standpoint of the user, but in order to change the opening / closing angle of the original pressure plate in multiple steps, It is necessary to prepare a plurality of opening / closing angle regulators according to the angle, which has the disadvantage that the number of parts is large and the manufacturing cost is high.

In view of the above-mentioned conventional drawbacks, the present invention provides a document pressure plate opening / closing device capable of continuously adjusting the open / close angle of the document pressure plate so that the most efficient opening / closing angle can be obtained during copying. The purpose is to do.

[0005]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, the present invention provides a support frame attached to a main body of a copying machine, a rotary frame attached to a document pressure plate, and a base end portion of which is pivotally supported by the support frame, and the both frames. In the document pressure plate opening / closing device having a spring that biases the document pressure plate in the opening direction by being interposed between the support frame and the rotating frame, the opening / closing angle of the document pressure plate is set. An opening / closing angle adjusting tool for adjustment is provided, and the opening / closing angle adjusting tool has its main body slidably fixed to one of the supporting frame and the rotating frame and has its tip end portion. Of the supporting frame and the rotating frame are arranged facing each other so as to be able to come into contact with the other frame, and the opening / closing angle adjusting tool is slid to change the contact position between the tip portion and the other frame. This allows the opening / closing angle of the original pressure plate to be adjusted. .

[0006]

[Action]

 In the above configuration, when copying an original with a copying machine, for example, the original may be placed on the contact glass and the original pressure plate may be pressed down against the spring. As a result, the rotation moment increases as the document pressure plate rotates downward, and finally the rotation moment becomes larger than the biasing force of the spring, so that the document is pressed firmly and adheres tightly to the contact glass. Can be made.

After the copying is completed, when the original document pressure plate is pulled up, the original document pressure plate is tilted, and accordingly, the rotation moment is reduced to balance with the urging force of the spring. Can be held in a tilted state.

When the opening / closing angle of the original pressure plate is set to an angle that allows the opening / closing operation to be performed most easily, the opening / closing angle adjusting tool is slid so that the leading end of the opening / closing angle adjuster comes into contact with the supporting frame or the rotating frame facing it. Just change the position. As a result, the opening / closing angle of the original pressure plate can be adjusted steplessly within the range of 90 ° to 60 ° according to the embodiment.

[0009]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. 1 and 2 show an original pressing plate opening / closing apparatus which is an embodiment of the present invention attached to a copying machine, and includes a support frame 2 attached to an upper surface 1a of a copying machine main body 1 and an original pressing plate. The manuscript pressure plate 3 is attached in the opening direction by being mounted on the plate 3 and having a base end pivotally supported by the support frame 2 and a pivoting frame 4 interposed between the frames 2 and 4 on the front side. A spring device 5 for urging and an opening / closing angle adjusting tool 6 provided on the rear side between the frames 2 and 4 are provided.

The support frame 2 includes a bottom wall 2a fixed to the upper surface 1a of the copying machine main body 1 by fasteners 8 and 9, and a pair of left and right bent upwards from both side edges of the bottom wall 2a. Has side walls 2b, 2b and a rear wall 2c bent upward from the rear end of the bottom wall 2a. As shown in FIG. 3, the rear ends of the side walls 2b, 2b are connected to the rear wall. A pair of left and right stoppers 10 is formed so as to project rearward from the portion 2c, and an upper end portion 10a of the stopper 10 projects upward from an upper end of the rear wall portion 2c. By contacting the rear edge 4a of the moving frame 4, the opening / closing angle of the original pressure plate 3 can be restricted to about 90 ° (see the phantom line in FIG. 1).

The rotating frame 4 includes a top plate portion 4b fixed to the original pressure plate 3, and a pair of left and right side wall portions 4c and 4c bent downward from both side edges of the top plate portion 4b. The base end portions of the both side wall portions 4c, 4c are pivotally supported by a pivot shaft 11 provided between the both side wall portions 2b, 2b of the support frame 2.

The spring device 5 includes, for example, a synthetic resin cylindrical body 12 and a support shaft 13 that are movably fitted to each other, and a collar portion 12 a integrally formed at the base end portions of the contracted cylindrical body 12 and the support shaft 13. 13b has a spring 14 interposed therebetween, and an arcuate recess 15 formed on the base end surface of the cylindrical body 12 is provided on the lower front side of the pivot shaft 11 between the side wall portions 2b, 2b of the support frame 2. The upper engagement shaft 18 is fitted to the erected lower engagement shaft 16 and the arc-shaped recess 17 formed on the base end surface of the support shaft 13 is erected at the center of both side wall portions 3b, 3b of the rotating frame 4. The document pressure plate 3 is urged in the opening direction by being fitted to the. In FIG. 1, reference numeral 19 denotes a substantially L-shaped spring protection plate, which is arranged along the spring 14 and has its base end locked to the cylindrical body 12. It should be noted that one or more springs 14 are provided corresponding to the weight of the original pressure plate 3.

As shown in FIG. 3, the opening / closing angle adjusting tool 6 has a substantially flat U-shape in a plan view, is arranged between both stoppers 10 along the rear wall portion 2c of the support frame 2, and is attached to the main body 6a. The opening / closing angle adjusting tool 6 is slid onto the rear wall portion 2c by screwing a screw 22 into the screw hole 21 formed in the rear wall portion 2c through a pair of elongated holes 20 formed along the vertical direction. Id is fixed. Further, tip portions 6c, 6c inclined obliquely upward from the upper ends of a pair of side wall portions 6b, 6b bent backward from both side edges of the main body 6a face the rear end edge 4a of the rotating frame 4. The opening / closing angle adjusting tool 6 is slid up and down to adjust the height H of the opening / closing angle adjusting tool 6 so that the tip portions 6c, 6c and the rear edge 4a of the rotating frame 4 come into contact with each other. By appropriately changing the position A (see FIG. 4), the opening / closing angle α of the original cover plate 3 can be adjusted and finely adjusted in a stepless manner.

In the above-mentioned configuration, when attaching the original pressing plate 3 to the copying machine main body 1, the holding frame 2 with the opening / closing angle adjusting tool 6 slid to the lower limit (see phantom lines in FIG. 1 and FIG. 5). Can be fastened to the upper surface 1a of the copying machine main body 1 with fasteners 8 and 9. At this time, since the opening / closing angle α of the document pressure plate 3 is about 90 ° and the upper part of the support frame 2 is open, the fastening operation can be easily performed.

Next, the opening / closing angle adjusting tool 6 is appropriately slid upward, and the opening / closing angle adjusting tool 6 is fixed to the rear wall portion 2c of the support frame 2 with a screw 22 to obtain the most efficient opening / closing angle during copying. The opening / closing angle α of the original pressure plate 3 is adjusted so as to be obtained. Here, for example, when the opening / closing angle adjusting tool 6 is slid to the upper limit, the opening / closing angle α of the original pressure plate 3 can be set to about 60 ° (see FIGS. 4 and 6). By appropriately setting the slide position of the angle adjuster 6 between the upper limit and the lower limit, the opening / closing angle α of the original pressure plate 3 is continuously adjusted within the adjustment range β (see FIG. 6) between 90 ° and 60 °. You can make fine adjustments with.

Subsequently, when copying the original, the original is placed on the contact glass 25 and then the original pressure plate 3 in the open state is pushed down against the spring 14. As a result, as shown in FIG. 1, as the original pressure plate 3 rotates downward, its rotational moment M becomes larger, and finally its rotational moment M becomes larger than the urging force F of the spring 14. As a result, the original can be surely pressed and brought into close contact with the contact glass 25.

After the copying is completed, when the original document pressure plate 3 is pulled up, the original document pressure plate 3 is tilted, and accordingly, the rotational moment M becomes smaller and balances with the urging force F, as shown in FIG. As shown, the document pressure plate 3 can be held at a predetermined opening / closing angle α.

In the above-described embodiment, the opening / closing angle adjusting tool 6 is fixed to the support frame 2 side, and the tip portions 6c and 6c of the open / close angle adjusting tool 6 are brought into contact with the rear end edge 4a of the rotating frame 4. However, on the contrary, Alternatively, the opening / closing angle adjusting tool 6 may be fixed to the rotating frame 4, and the tip portions 6c, 6c thereof may be brought into contact with the rear end edge of the support frame 2. Further, although the case where the document pressure plate opening / closing device is attached to the copying machine has been described as an example, the document pressure plate opening / closing device can also be attached to various other devices and used to press the document.

[0019]

[Effect of device]

 According to the present invention, by simply sliding the opening / closing angle adjusting tool and changing the contact position between the tip of the opening / closing angle adjusting tool and the supporting frame or the rotating frame, the opening / closing angle of the original pressure plate can be easily opened / closed. Because it can be adjusted steplessly, the number of parts is smaller and the manufacturing cost is lower than before.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of a document pressure plate opening / closing device according to an embodiment of the present invention.

FIG. 2 is a plan view of the same.

FIG. 3 is an exploded perspective view of the main part.

FIG. 4 is a perspective view showing a state in which the opening / closing angle of the original pressure plate is reduced.

FIG. 5 is a perspective view showing a state in which the opening / closing angle of the original pressure plate is increased.

FIG. 6 is a vertical cross-sectional view showing a state in which the opening / closing angle of the original pressure plate is reduced.

[Explanation of symbols]

 1 Copier main body (main body) 2 Support frame 3 Original crimping plate 4 Rotating frame 6 Opening / closing angle adjusting tool 11 Pivot shaft 14 Spring 20 Long hole 22 Screw α Opening / closing angle A Contact position

Claims (1)

[Scope of utility model registration request] 1. A support frame attached to a main body of a copying machine, a rotary frame attached to a document pressure plate, and a base end portion of which is pivotally supported by the support frame, and is interposed between both frames. As a result, in the document pressure plate opening / closing device having a spring for urging the document pressure plate in the opening direction, an opening / closing angle adjusting tool for adjusting the opening / closing angle of the document pressure plate between the support frame and the rotating frame. The opening / closing angle adjusting tool has a main body slidably fixed to one of the supporting frame and the rotating frame, and a tip end portion of the supporting frame and the rotating frame. The opening / closing angle of the original pressure plate is adjusted by sliding the opening / closing angle adjusting tool so as to contact the other frame and changing the contact position between the tip of the opening / closing angle adjusting tool and the other frame. A document pressure plate opening / closing device, which is configured to be possible.