CN117250834A

CN117250834A - Opening and closing supporting device and office machine

Info

Publication number: CN117250834A
Application number: CN202310717562.7A
Authority: CN
Inventors: 小川觉司
Original assignee: Kem Hongkong Ltd
Current assignee: Kem Hongkong Ltd
Priority date: 2022-06-16
Filing date: 2023-06-16
Publication date: 2023-12-19
Also published as: JP2023183757A

Abstract

The invention provides an opening and closing support device and an office machine. The invention provides an opening and closing support device, which can ensure the space of a torque generating part and reduce the abrasion of a cam part caused by repeated opening and closing. The opening and closing support device comprises: a mounting member mounted on a device body of the office machine; a support member rotatably supported by the mounting member via a spindle shaft; a lifting member mounted on the opening/closing body and overlapped with the supporting member, and pivotally supported on the free end of the supporting member by a lifting shaft to rotate in a direction opposite to the rotation direction of the supporting member; a slider and a sliding lifter which are accommodated in the support member and slide; an elastic member elastically provided between the slider and the sliding lifter; and a pressure-receiving pin which is pressure-contacted with the cam portion of the slider. The mounting member has a pair of side plates each having a mounting hole at a position opposed to each other, each mounting hole being fitted with a bushing, the pressure-receiving pin being interposed between the pair of side plates by a bushing pedestal, the bushing being divided in an axial direction and a contractible dividing portion being provided in a radial direction.

Description

Opening and closing supporting device and office machine

Technical Field

The present invention relates to an opening/closing support device and an office machine, and more particularly, to an opening/closing support device with a rotatable bearing pin and an office machine having the same.

Background

Conventionally, office machines such as copiers, scanners, and printers use an openable body (document pressing plate) to press a document onto an exposure glass, and the openable body (document pressing plate) prevents external light from entering an exposure system in the apparatus body. In order to allow the opening/closing body to be opened/closed with respect to the device body, various opening/closing support devices are known.

There are several kinds of opening and closing supporting means for controlling the movement of the cam slider using a pressing member (pressing pin or pressing roller) abutted against the outer surface of the bottom of the cam slider.

Japanese patent laid-open publication No. 2008-257167 (paragraph [0019 ]) describes: the document pressing plate opening and closing device 1 includes: a mounting member 2 mounted on the machine body 11 side of the office machine 10 having the original pressing plate 12; a support member 3 pivotally supported by the mounting member 2 and rotatable about a first hinge pin 15; a lifting member 4 mounted on the original pressing plate 12 and overlapped with the supporting member 3 while being pivotally supported on a free end portion of the supporting member 3 about a second hinge pin 16; and an elastic device 5 provided between the lifting member 4 and the mounting member 2, for urging the lifting member 4 in a direction overlapping the supporting member 3 and simultaneously urging the document pressing plate 12 to rotate in the opening direction. By rotating the original pressing plate 12, a closed state in which the original pressing plate 12 covers the upper face of the machine body 11, and an open state in which the upper face of the machine body 11 is exposed can be formed. The original pressing plate opening and closing device 1 of the first embodiment of the present invention further includes: an engaging device 6 that prevents the original cover plate 12 from reversing over a specific opening angle range of the original cover plate 12; and engagement releasing means 9 for releasing the engagement means 6 outside a specific opening angle range of the original cover 12 to allow the original cover 12 to be reversed. A method for manufacturing a semiconductor device

In the above publication, a pressure-receiving pin that does not rotate is fixed to the mounting base as a pressure-receiving member.

The bearing pin of the original pressing plate opening and closing device cannot rotate because of being fixed on the mounting base, and friction can be generated on the sliding cam under the condition of repeated opening and closing. In particular, when the ADF (Auto Document Feeder) is heavier, the contact pressure between the pressing pin and the slide cam increases, which increases the friction amount. In this way, the problem of wear of the cam portion occurs.

In addition, japanese patent laid-open publication No. 2011-227370 (paragraph [0013 ]) describes the following: the "original pressing plate opening and closing device" includes: a mounting member mounted to a machine body of the office machine; a support member pivotally supported on the mounting member by a first hinge shaft; a lifting member mounted to the original pressing plate and overlapped with the supporting member, and pivotally supported on a free end portion of the supporting member through a second hinge shaft so as to be rotatable in a direction opposite to a rotation direction of the supporting member; an elastic device arranged between the mounting member and the supporting member, for applying force to rotate the original pressing plate in the opening direction; and a connecting mechanism for controlling rotation of the lifting member in association with the opening and closing operation of the original pressing plate; the original pressing plate opening and closing device further includes: a first connecting arm that rotates one end of the connecting mechanism mounted on the mounting member side; a second connecting arm, one end of which is installed at the lifting member side to be rotated, and the other end of which is coupled to the other end side of the first connecting arm by a coupling means to be rotated with each other; and cam means acting on the coupling means. A method for manufacturing a semiconductor device

In the above publication, the mechanism used for the pressure-receiving member is as follows: a roller made of resin or metal is additionally provided to rotate the fixed bearing pin.

The mechanism in which the roller rotates can reduce abrasion, but the roller is added, so that the space of the torque generating part is reduced. In recent years, the hinge installation space of a copying machine tends to be smaller, and is contrary to the case where it is actually intended to secure a space of a torque generating portion as much as possible.

In order to solve the above problems, the present invention has been made in an effort to provide a mechanism for rotating a pressure-receiving pin itself without using a roller and without changing the diameter of the pressure-receiving pin after trial and error. The space of the torque generating part is ensured because the roller is not used and the diameter length of the pressure bearing pin is not changed. In addition, by means of the mechanism for rotating the bearing pin, abrasion of the cam part caused by repeated opening and closing can be reduced.

Disclosure of Invention

The invention aims to provide an opening and closing support device which can ensure the space of a torque generating part and reduce abrasion caused by repeated opening and closing of a cam part.

The construction of the present invention is as follows.

The opening and closing support device of the present invention comprises: a mounting member mounted on a device body of the office machine; a support member rotatably supported by the mounting member via a spindle shaft; a lifting member mounted on the opening/closing body, the lifting member overlapping the support member, the lifting member being pivotally supported by the free end of the support member by a lifting shaft and being rotatable in a direction opposite to a rotation direction of the support member; a slider and a sliding lifter which are accommodated in the support member and slide; an elastic member elastically provided between the slider and the sliding lifter; and a pressure-receiving pin which is pressure-contacted with the cam portion of the slider. Wherein the mounting member has a pair of side plates provided with mounting holes at positions opposed to each other, each mounting hole being fitted with a bushing, respectively, through which the pressure-receiving pin is journaled between the pair of side plates, the bushing being divided in the axial direction and provided with a contractible dividing portion in the radial direction.

The opening and closing support device of the invention is preferably constructed as follows: the bushing has a circular ring part, a cylindrical part, and a connecting part connecting the circular ring part and the cylindrical part, the dividing part includes a substantially triangular part in plan view and a substantially rectangular part in plan view, and the substantially triangular part in plan view has a dividing part with a large area and a dividing part with a small area; the substantially rectangular planar portion is constituted by only small-area divided portions, and the substantially triangular planar portion is provided from the annular portion to the connecting portion, and the substantially rectangular planar portion is provided from the connecting portion to the cylindrical portion.

The office machine of the present invention uses the opening and closing support device as described above.

The opening/closing support device of the present invention includes the above-described structure (i.e., a mechanism that rotates the pressure-receiving pin itself without using a roller and without changing the diameter of the pressure-receiving pin), thereby ensuring a space for the torque generating portion and reducing abrasion of the cam portion due to repeated opening/closing. The bushing is divided in the axial direction, and the contractible dividing part is arranged in the radial direction, so that the pressure-bearing pin can be pushed into the bushing to be stably mounted, the rotation of the pressure-bearing pin is smooth, and the abrasion of the cam part caused by repeated opening and closing is reduced.

The office machine of the invention adopts the opening and closing supporting device with the structure, and the opening and closing supporting device comprises a mechanism which does not use rollers and does not change the diameter length of the pressure bearing pin to rotate the pressure bearing pin, so that the space of the torque generating part can be ensured, and the abrasion of the cam part caused by repeated opening and closing can be reduced.

Drawings

Fig. 1 is a perspective view of an office machine using the opening/closing support device of embodiment 1 of the present invention.

Fig. 2 is a schematic diagram of an opening/closing support device according to embodiment 1 of the present invention, and is also a perspective view of the opening/closing support device in an open state.

Fig. 3 is a schematic view of an opening and closing support device according to embodiment 1 of the present invention, and is also a perspective view of the opening and closing support device in a closed state.

Fig. 4 is an exploded perspective view of the opening/closing support device according to embodiment 1 of the present invention.

Fig. 5 is a schematic view of a mounting member of the opening/closing support device according to embodiment 1 of the present invention, (a) is a plan view thereof; (b) is a right side view thereof; (c) is a front view thereof.

Fig. 6 is a right side view of the bearing pin of the opening/closing support device of embodiment 1 of the present invention.

Fig. 7 is a schematic view of a bushing of the opening and closing support device of embodiment 1 of the present invention, (a) is a perspective view thereof; (b) is a front view thereof; (c) is a bottom view thereof.

Fig. 8 is a partial sectional view of an opening/closing support device according to embodiment 1 of the present invention.

Fig. 9 is a schematic view of the opening/closing support device of embodiment 1 of the present invention, and is also a sectional view when the hinge angle is 60 °.

Fig. 10 is a schematic view of the opening/closing support device of embodiment 1 of the present invention, and is also a cross-sectional view when the hinge angle is 0 °.

Detailed Description

(embodiment 1)

The following describes an opening/closing support device according to a preferred embodiment of the present invention with reference to the accompanying drawings and an office machine including the same.

In the following description, reference is made to the front-rear, left-right, and up-down directions shown in the rectangular coordinate system of fig. 1.

The office machine according to the present invention includes, but is not limited to, a copying machine such as a copying machine or a multi-function peripheral, a printer, a facsimile machine, a scanner, and the like.

In fig. 1, reference numeral 1 denotes a copier which is one example of an office machine.

The office machine 1 includes a device body 2, exposure glass 4, an operation unit 5, and an openable body (original pressing plate) 3, the device body 2 being substantially cubic; the exposure glass 4 is positioned on the upper surface 2a of the device body 2; the operation part 5 is arranged at the right lower part of the upper surface 2a; the opening and closing body (original pressing plate) 3 opens and closes with respect to the upper surface 2a of the apparatus main body 2.

The opening/closing body (original pressing plate) 3 has a type with an automatic document feeder and a light type without an automatic document feeder, but in this embodiment, is a type with an automatic document feeder. The type of the attached automatic document feeder is heavier at the left side portion of the front surface thereof, and therefore the left opening/closing support device 10 and the right opening/closing support device 10A are generally different in configuration. The present embodiment will be described with respect to the opening/closing support device shown by reference numeral 10 installed on the left side of the weight, and the opening/closing support device shown by reference numeral 10A will be omitted.

The opening/closing body 3 is connected to the device body 2 via opening/closing support means (hinges) 10, 10A, and is rotated. The opening/closing body 3 is attached to the apparatus body 2 by means of the opening/closing support devices 10 and 10A, and is opened/closed with respect to the apparatus body 2. In fig. 1, the opening/closing body 3 is in an open state. The open state means a state in which the lower surface 3a of the opening/closing body 3 is separated from the upper surface 2a of the apparatus main body 2; the closed state refers to a state in which the lower surface 3a of the openable and closable body 3 is attached to the upper surface 2a of the apparatus main body 2.

As shown in fig. 2 to 4, the opening/closing support device 10 according to embodiment 1 of the present invention includes a mounting member 11, a support member 12, and a lifting member 13, wherein the support member 12 is rotatably mounted on the mounting member 11 via a main shaft 16; the lifting member 13 is mounted to the support member 12 via a lifting shaft 41.

As shown in fig. 4 and 5, the mounting member 11 includes a bottom surface portion 11a, a pair of side plates 11b, and a rear plate 11e, and the pair of side plates 11b, 11b stand upward from the bottom surface portion 11 a; the rear plate 11e extends upward from the rear end portion of the bottom surface portion 11 a.

The bottom surface 11a is provided with mounting holes 11c, 11d through which screws are passed to be mounted on the apparatus body 2. A stopper 24 having a slightly plate shape is mounted on the rear plate 11e by a small screw 26. The pair of side plates 11b, 11b are provided with mounting holes 11g, and the main shaft 16 is mounted to the mounting holes 11g, 11g through bearings 22, 22 and collars 23, 23. The spindle 16 is also mounted on the support member 12, and the mounting member 11 is supported by the spindle 16 to rotate the support member 12. The pair of side plates 11b, 11b are provided with mounting holes 11f, and the pressure-receiving pin 17 is mounted to the mounting holes 11f, 11f through bushings 28, 28 and the E-ring 29. Reference numeral 11i denotes an internally threaded hole to which the small screw 26 is attached.

As shown in fig. 4, the lifting member 13 includes a top plate portion 13a having a substantially rectangular shape in plan view, a pair of side plates 13b, 13b standing downward from the top plate portion 13a, and bent portions 13c, 13c bent outward from lower ends of the pair of side plates 13b, 13 b. The pair of side plates 13b, 13b are provided with mounting holes 13e, 13e and mounting holes 13f, 13f for mounting the lifting shaft 41 and the pressing member 42, respectively.

The top plate 13a is provided with a height adjusting screw 25 for adjusting the mounting height of the opening/closing body 3.

The bending portions 13c, 13c are provided with a plurality of holes 13d, and the lifting member 13 can be attached to the opening/closing body 3 by a plurality of screws.

As shown in fig. 4, the support member 12 includes a top plate 12a having a substantially rectangular shape in plan view, a pair of side plates 12b, 12b standing downward from the top plate 12a, and bent portions 12c, 12c bent inward from lower ends of the pair of side plates 12b, 12 b.

The pair of side plates 12b, 12b of the support member 12 are provided with mounting holes 12f, and are mounted on the pair of side plates 11b, 11b of the mounting member 11 through the main shaft 16, so that the support member 12 is supported by the mounting member 11 to be rotatable. The pair of side plates 12b, 12b is provided with a protruding boss 12d on the side close to the side plate 13b, thereby correcting the looseness of the side plate 12b with respect to the side plate 13 b.

The support member 12 has a mounting hole 12g at the free end side thereof, through which the lifting shaft 41 passes and is mounted on the pair of side plates 13b, 13b of the lifting member 13.

The support member 12 is formed in a substantially rectangular shape in plan view, and has a substantially cylindrical shape as a whole, and a storage space 12h is provided in the cylinder. The top plate 12a is provided with a friction protrusion 12e protruding into the storage space 12h.

As shown in fig. 4, the slider 14, the damper 27, the spacer 21, the spring (large diameter) 32, the spring (small diameter) 33, and the slide lifter 15 are disposed in this order from the rear side in the housing space 12h of the support member 12. When the above members are combined, the spring (small diameter) 33 is inserted and arranged in the diameter of the spring (large diameter) 32, and the damper 27 is inserted and arranged in the spring (small diameter) 33.

As shown in fig. 4, the slider 14 includes a rear surface portion 14a, two side surface portions 14b, a top surface portion 14c, a bottom surface portion 14f, and concave portions 14d, 14e.

As shown in fig. 9 and 10, the rear surface portion 14a is formed with a cam portion (top portion) 14x.

As shown in fig. 4, the slide lifter 15 includes a front surface portion 15a, both side surface portions 15b, a top surface portion 15c, a bottom surface portion 15f, and concave portions 15d, 15e.

As shown in fig. 4, 9, and 10, the elastic member 31 is composed of a (coil spring) spring (small diameter) 33 and a (coil spring) spring (large diameter) 32. The elastic member 31 is disposed between the slider 14 and the slide lifter 15 in the storage space of the support member 12. That is, the elastic member 31 is elastically provided between the slider 14 and the slide lifter 15.

The elastic member 31 may be constituted by only the spring (small diameter) 33 or the spring (large diameter) 32, or may be constituted by a larger number of springs.

The damper 27 is also inserted and arranged in the diameter of the spring (small diameter) 33 through the spacer 21. One end side of the damper 27 is provided with a rim portion 27a, and the other end side is provided with a protruding piston 27b.

As shown in fig. 2 to 4, 9 and 10, the pressing member 42 is provided on the front surface side of the slide lifter 15, the pressing pin 17 is provided on the cam portion 14x on the rear side of the slider 14, and the elastic member 31 is elastically provided between the slider 14 and the slide lifter 15, and both the elastic members are accommodated in the accommodation space 12h of the support member 12 and slid.

As shown in fig. 6, the pressure pin 17 has a disk-shaped head portion 17a, a cylindrical portion 17b, and a distal end portion 17d provided with a recess 17 c.

The diameter of the cylindrical portion 17b is the same as that of the existing pressure-receiving pin.

As shown in fig. 7, the bush 28 includes a circular ring portion 28a, a cylindrical portion 28b, and a connecting portion 28d connecting the circular ring portion 28a and the cylindrical portion 28b. The bush 28 is divided in the axial direction, and provided with a dividing portion 28c contractible in the radial direction. The dividing portion 28c includes a substantially triangular portion in plan view and a substantially rectangular portion in plan view, the substantially triangular portion in plan view having a large-area dividing portion and a small-area dividing portion; the substantially rectangular portion is constituted by only a small-area divided portion in plan view. The substantially triangular portion is provided from the circular ring portion 28a to the connecting portion 28d in plan view; the substantially rectangular portion is provided from the connecting portion 28d to the cylindrical portion 28b in plan view. In fig. 7, a portion denoted by reference numeral 28e is a cut-off corner.

The bush 28 is divided in the axial direction and provided with a dividing portion 28c which is contractible in the radial direction, so that the pressure-receiving pin 17 can be pushed into the bush 28 to be stably mounted, and the rotation of the pressure-receiving pin 17 can be made smooth, thereby reducing abrasion of the cam portion due to repeated opening and closing.

In the opening/closing support device 10 according to embodiment 1 of the present invention, the bushings 28 are provided on the both side plates 11b and 11b of the bottom surface portion 11a (mounting base), so that the rotation of the pressure-receiving pin 17 itself can be made smooth.

As shown in fig. 4, the E-ring 29 has a plate-like portion 29a, and the plate-like portion 29a is provided with a cutout portion 29b. The E-ring 29 sandwiches the concave portion 17c of the pressure receiving pin 17, so that even if the pressure receiving pin 17 rotates, it can be prevented from falling out of the mounting hole 11f.

As shown in fig. 4, the stopper 24 includes a plate-like portion 24a and a pair of side plates 24b, 24b. The plate-like portion 24a is provided with a plurality of holes 24c, and the stopper 24 is mounted on the rear plate 11e of the mounting member 11 by means of small screws 26. The side plate 24b has cutouts 24d, 24e, and 24f at the upper, and lower portions thereof.

As shown in fig. 10, in the closed state, the upper side of the cam portion 14x of the rear surface portion 14a of the slider 14 abuts against the pressure pin 17, and the pressure pin 17 receives pressure.

As shown in fig. 9, in the open state, the slider 14 is in contact with the pressure pin 17 at the lower side of the cam portion 14x of the rear surface portion 14a thereof.

When the opening/closing body is turned from the closed state to the open state, the cam portion 14x moves from the upper side to the lower side in contact with the pressure pin 17, and the pressure pin 17 is rotated. At this time, the bearing pin 17 is pivoted by the bush 28 at both ends, so that the bearing pin 17 rotates with little friction.

The open-close supporting device of the invention ensures the space of the torque generating part by a structure without using rollers and changing the diameter length of the pressure bearing pin, and simultaneously can reduce abrasion of the cam part caused by repeated open-close by a structure of rotating the pressure bearing pin. In addition, the office machine with the opening and closing support device can achieve the effects.

Claims

1. An open-close support device, comprising:

a mounting member mounted on a device body of the office machine;

a support member rotatably supported by the mounting member via a spindle shaft;

a lifting member attached to the opening/closing body, the lifting member overlapping the support member, the lifting member being pivotally supported by a lifting shaft at a free end of the support member so as to be rotatable in a direction opposite to a rotation direction of the support member;

a slider and a sliding lifter which are housed inside the support member to be slid;

an elastic member elastically provided between the slider and the sliding lifter; and

a pressure-receiving pin which is pressure-contacted with the cam portion of the slider;

the mounting member has a pair of side plates, each of which has a mounting hole at a position facing each other, each of which mounts a bush, the pressure-receiving pin is supported between the pair of side plates by the bush shaft, the bush is divided in an axial direction, and a divided portion is provided so as to be contracted in a radial direction.

2. The opening/closing support device according to claim 1, wherein the bush has a circular ring portion, a cylindrical portion, and a connecting portion connecting the circular ring portion and the cylindrical portion, wherein the dividing portion includes a substantially triangular portion in plan view having a large area dividing portion and a small area dividing portion, and a substantially rectangular portion in plan view consisting of only the small area dividing portion, the substantially triangular portion in plan view being provided from the circular ring portion to the connecting portion, and the substantially rectangular portion in plan view being provided from the connecting portion to the cylindrical portion.

3. An office machine using the opening and closing support device according to claim 1.