JPH0132033Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an opening/closing device, and for example, to a braking structure capable of holding an opening/closing body of a copying machine in an arbitrary position, which includes a built-in transport mechanism for feeding a copy document to an optical surface.

2. Description of the Related Art In a copying machine, a document feeding device incorporating a conveyance mechanism for feeding a copy document onto an optical surface is provided so as to be openable and closable in order to directly place the book or the like on the optical surface when copying a book or the like. A braking device is required in the opening/closing device in order to hold the opening/closing body incorporating such a transport mechanism in an arbitrary opening/closing position. As this braking device, a device that uses a coil spring to perform braking with weight balance is known, but it has drawbacks such as the inability to hold the opening/closing body in an arbitrary opening/closing position and the difficulty in adjusting the coil spring. have.

The present invention was developed in view of the above drawbacks, and a brake plate that rotates integrally with the opening/closing body is clamped by a pair of restraining plates provided with parts that come into contact with the brake plates, and the interval between the restraining plates is adjusted. To provide an opening/closing device which is supported by a support, can reliably apply braking from both sides of a brake plate, can hold an opening/closing body in any opening/closing position, and has a simple structure.

Next, the structure of an embodiment of the present invention will be explained with reference to the drawings.

Reference numeral 1 denotes a base body, for example, a main body of a copying machine, and an optical surface 2 formed of a glass plate or the like is provided on the upper surface. A pair of shaft supports 3 are provided at one end of the upper surface of the main body 1, spaced apart from each other.
is fixed with screw 4. This pivot support 3 has pivot supports 6 bent vertically on both sides of a fixed plate portion 5.

Reference numeral 7 denotes an opening/closing body which has a built-in transport mechanism for transporting a document inserted from an insertion section (not shown) to the optical surface 2. A pair of support plates 8 are fixed to one end of the opening/closing body 7 so as to face the pivot support 3, and a pivot support piece 9 bent at right angles is formed on this support plate 8. A boss 10 is fixed to the. The support shaft 11 penetrating this boss 10 is connected to the boss 1 by a pin 12.
It is fixed at 0. The support shaft 11 is rotatably supported by the shaft support 6 of the shaft support 3.

Also, a brake plate 13 with a large diameter is provided on one side of the boss 10.
is fixed. The brake plate 1 is connected to a pair of restraining plates 16 and 17, which have annular pads 14 and 15 fixed to their inner surfaces, which are press-contacted to both sides of the brake plate 13, respectively.
It is holding 3. This one restraining plate 16 is formed by overlapping a plurality of spring plate materials, and this restraining plate 1
The center portion of the pad 6 is curved toward the brake plate 13, and elasticity is imparted so that the pad 14 is pressed against the brake plate 13.

The pair of restraining plates 16 and 17 are formed in a substantially triangular shape, and a coupling member such as a screw 18 passing through both ends of the restraining plates 16 and 17 is connected to a support hole 19 formed in the pivot support 6 of the pivot support 3. Both restraining plates 16,
17 is fastened and connected with the brake plate 13 in between.

Further, reference numeral 21 denotes a column that maintains the distance between the holding plates 16 and 17, and is fixed to the top of one of the holding plates 16. The protruding rod portion 23 is inserted into the engagement hole 24 of the other restraining plate 17 .

Incidentally, both surfaces of the brake plate 13 are entirely formed with uneven surfaces to prevent the generation of squeaks due to excessive contact with the pads 14 and 15.

Next, the operation of this embodiment will be explained.

When the opening/closing body 7 is opened, a rotational force acts on the boss 10 fixed to the support plate 8, and the support shaft 1 fixed to the boss 10 is
1 is pivotally supported by a shaft support 6 of a shaft support 3 and rotated. The brake plate 13 is also rotated by the rotation of the boss 10, and the pads 14 and 15 fixed to the restraining plates 16 and 17 are brought into contact with the brake plate 13, and the brake plate 13 is at the position where the opening/closing body 7 is rotated. The brake is applied, and the opening/closing body 7 is held in the rotated position.

The restraining plates 16 and 17 are maintained at a distance by the support 21, the restraining plates 16 and 17 are held parallel to the brake plate 13, and the pads 14 and 15 are brought into contact with the brake plate 13 in parallel to ensure that braking is performed reliably. be exposed.

Note that if air, oil, etc. are present in the gaps between the pads 14, 15 and the brake plate 13 due to the uneven surface of the brake plate 13, the pads 14, 15 will not be attracted to the brake plate, and abnormal noises due to squeaks will occur. occurrence will be reduced.

In the above embodiment, an opening/closing device for an opening/closing body incorporating a conveyance mechanism of a copying machine has been described, but the present invention is applicable not only to copying machines but also to various opening/closing devices.

According to the present invention, a brake plate is attached to a support shaft that rotatably supports the opening/closing body, and this brake plate is clamped by a restraining plate having pads fixed to the inner surface, and both sides of this restraining plate are connected to form a joint. Since the spacing between the two restraining plates is maintained by the pillars, braking is applied when the opening/closing body is opened and closed, and the opening/closing body is held at any desired opening/closing position. The plates are held parallel to each other and the pads are brought into contact parallel to the brake plate to ensure braking,
The construction is also easily done.

Further, by forming one of the pair of restraining plates with a plurality of spring rods and imparting elasticity that presses the pad against the brake plate, the pad can be reliably pressed against the brake plate.

[Brief explanation of the drawing]

Fig. 1 is a side view of a part of a copying machine equipped with an opening/closing device according to an embodiment of the present invention, Fig. 2 is a plan view of the above opening/closing device, and Fig. 3 is the relationship between the braking plate and the restraining plate. FIG. 4 is a side view of the same, and FIG. 5 is a front view of the support column. 1... Main body as a base, 3... Pivot support, 7...
Opening/closing body, 11... Support shaft, 13... Braking plate, 14,
15... Padded, 16, 17... Holding plate, 18...
...screw as a connecting body, 21...support.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) A pivot fixed to the base, a pivot supported rotatably on the pivot and attached to the opening/closing body, and a pivot fixed to the pivot. a brake plate, a pair of restraining plates whose both sides are fastened to each other by a coupling body, a pad to be pressed against the brake plate is fixed on the inner surface, and the brake plate is clamped by being held by the shaft support; An opening/closing device characterized by comprising a support that projects from either one of a pair of restraining plates and maintains a distance between the restraining plates. (2) The opening and closing according to claim 1 of the utility model registration claim, characterized in that either one of the pair of restraining plates is formed of a plurality of spring plates imparting elasticity to press the pad against the brake plate. Device.