CN110187623B

CN110187623B - Cover opening and closing device and various machines

Info

Publication number: CN110187623B
Application number: CN201910131883.2A
Authority: CN
Inventors: 小川觉司
Original assignee: Kem Hongkong Ltd
Current assignee: Kem Hongkong Ltd
Priority date: 2018-02-22
Filing date: 2019-02-22
Publication date: 2022-02-01
Anticipated expiration: 2039-02-22
Also published as: TW201937265A; CN110187623A; JP7045690B2; JP2019143738A; TWI696879B

Abstract

The present invention provides a cover body opening and closing device which does not need to set a large dead angle between a device main body and a back side wall and can open a cover body in an opening state and various machines, and the cover body opening and closing device comprises: a mounting member mounted on the apparatus main body side; a support member rotatably pivoted to the mounting member by a first linking member 1; a lifting member pivoted to the free end side of the support member through a 2 nd connecting member so as to be rotatable in a direction opposite to the support member; an actuating member provided at a position rotated as the lifting member rotates about the 2 nd coupling member; and an elastic member elastically provided between the actuating member and the support member, for urging the lifting member in a direction overlapping with the support member and urging the support member in a direction in which the lid body is opened; the cover body opening and closing device has a bracket member which pivotally connects two side plates standing from a mounting base mounted on the cover body side to free end sides of the two side plates of the support member so as to be rotatable in a direction different from that of the lifting member.

Description

Cover opening and closing device and various machines

Technical Field

The present invention relates to a cover opening/closing device which is preferably used for opening/closing a cover of furniture such as an original cover plate and a cabinet of office equipment such as a copying machine and a printing machine, and various kinds of equipment using the cover opening/closing device.

Background

Conventionally, as a cover opening/closing device used particularly as an original cover plate opening/closing device for office machines such as a copying machine, for example, a cover opening/closing device described in japanese patent laid-open publication No. 2013-97363 is known, which includes the following members: a mounting member having a mounting base mounted on the apparatus main body side and two side plates standing from the mounting base; a supporting member having a back plate and two side plates folded from the back plate, and the two side plates are rotatably pivoted on the two side plates of the mounting member through a 1 st connecting member; and a lifting member having a back plate and mounting bases of both side plates folded from the back plate and an original manuscript pressing plate folded from both side plates, the both side plates being pivotally connected to free end sides of both side plates of the supporting member through a 2 nd connecting member so as to be rotatable in a direction different from that of the supporting member; an actuating member disposed at a position rotated with the lifting member rotating around the 2 nd connecting member; a pressure receiving member provided between both side plates of the mounting member; and an elastic member elastically provided between the pressure receiving member and the actuating member so as to urge the lifting member in a direction overlapping with the supporting member and to urge the supporting member in an opening direction of the original cover. In addition, office machines using such a cover opening and closing device are known. This type is now widely spread, and office machines such as copiers are now almost used.

In the known cover opening and closing device and office machine constructed as described above, since the original cover C mounted on the cover opening and closing device B is almost equipped with the automatic original feeding device, the original cover C itself has a considerably high height (thickness) because the original cover C has built-in these original automatic feeding mechanisms. As a result, when the copying machine a is set on the wall portion K side of the mounting position, the following inconvenience situation will occur (such a setting method is almost used), and therefore a countermeasure needs to be sought.

That is, when a heavy original (not shown) (particularly, in the case of a heavy original such as a book) is mounted on the original platform D of the apparatus main body D, or when a contact glass (not shown) of the original platform D is removed to repair the inside of the maintenance copy machine a, the original cover C needs to be opened to a fully open state (90 degrees +). As a result, as shown in fig. 15, since the original cover C inevitably protrudes to the rear of the apparatus main body D, there is a problem that a so-called dead space DS is generated between the wall portions K at the rear.

Therefore, an object of the present invention is to provide a cover opening and closing device and various machines (office machines) using the same, which can prevent a cover (original cover plate) from protruding to the rear of a device main body even when the cover is completely opened, and can eliminate a dead space between various machines provided on a wall side and the wall side.

In the description of the present invention and the claims, the field in which the opening and closing device is used is not limited to office machines such as copying machines, and thus, the document pressing plate is described as "document pressing plate", but the cover may be referred to as "cover" as required. In the description of the present invention, office machines are referred to as various types of machines, and an opening and closing device in which a cover is openably and closably attached to the various types of machines is used as the cover opening and closing device.

Disclosure of Invention

In order to achieve the above object, a cover opening and closing apparatus according to a first example of the present invention includes: a mounting member mounted on the apparatus main body side; a supporting member rotatably pivoted on the two side plates of the mounting member through a 1 st connecting member; a lifting member pivotally connected to both side plates on the free end side of the supporting member via a 2 nd connecting member so as to be rotatable in a direction opposite to the supporting member; a cam slider slidably disposed in the support member in contact with a pressure receiving member disposed between both side plates of the mounting member; a spring seat member that is slidably provided in the support member in contact with an actuating member provided on a free end side of the elevation member with respect to the support member; an elastic member elastically provided between the cam slider and the spring seat member; and a bracket member pivotally connected to both side plates of the elevation member and both side plates of the support member by a 2 nd connecting member, the cover being mounted on the bracket member so as to be rotatable in a direction opposite to the elevation member; a 1 st rotation restricting device provided between the support member and the mounting member to restrict a rotation angle of the support member; and a 2 nd rotation restricting device provided between the elevation member and the bracket member to restrict a rotation angle of the bracket member. .

According to the invention described in the second example of the invention, the rotation control means of the bracket member is constituted by: a 1 st rotation restricting device provided between the support member and the mounting member; a 2 nd rotation restricting device provided between the elevation member and the bracket member; and an elastic member acting on the actuating member.

Further, according to an invention described in a third example of the invention, the 1 st rotation restricting device of the second example is constituted by a stopper plate provided on the rear side of the mounting member for abutting with the rear side of the support member at a predetermined rotation angle of the support member.

Further, according to an invention described in a fourth example of the invention, the 2 nd rotation restricting means of the second example is constituted by snap-in portions provided on both side plates of the bracket member for snap-in engagement of the bracket with both side plates of the elevation member from one direction.

Further, according to an invention described in a fifth example of the invention, the 2 nd rotation restricting means is constituted by a projection provided on the elevation member to abut against the projection provided on the tray member to restrict the rotation of the tray member.

According to the invention described in the sixth example, the bracket member has the coupling side plates that link the opposite side plates of the bracket member on the 2 nd coupling member side, and the mounting base of the bracket member has a shape that is bent outward from the opposite side plates.

According to the invention described in the seventh example, the rotation angle of the 1 st rotation restriction device support member with respect to the mounting member is restricted to 60 degrees; the 2 nd rotation restricting means restricts the rotation angle of the bracket member with respect to the support member to 30 degrees.

According to the invention described in the eighth example, the bracket member is provided on the outer sides of both side plates of the elevation member, and the click portions are formed to bend a part of both side plates of the bracket member inward to click with both side plates of the elevation member.

According to the invention described in the ninth example, the bracket is provided with the friction torque generating means that generates the frictional force as the bracket member rotates relative to the elevation member.

According to the invention described in the tenth example, various apparatuses using the cover opening and closing devices according to the above-described respective inventions are provided.

According to the present invention, the bracket member is rotated with respect to the support member in a state where the cover (original cover) is lifted obliquely from the closed state with the aid of the elastic member, so that the cover (original cover) can be opened to an angle of the opened state. Therefore, the cover (original cover plate) can be opened to the angle of the opened state in a state where the center of gravity of the cover (original cover plate) is located further forward than in a case where the support member is simply rotated to the angle of the opened state. Therefore, it is possible to provide a cover opening/closing device and an office machine using the same, which can prevent a large dead space from being formed between the device main body and the wall on the back side thereof, prevent interference between the device main body and the wall on the back side thereof, and open the cover (original cover plate) to the angle of the opened state.

According to the invention described in the second example, the bracket member is pivotally connected to the support member and the elevating member using the conventional 2 nd connecting member. Therefore, the total number of parts is reduced compared with the case of using another new 2 nd connecting member, and the high-strength lid body opening and closing device can be configured to be small and light.

According to the invention described in the third example, the angle of the opened state of the original cover is accurately set by the 2 nd rotation restricting means. Further, since the posture of the original cover is rotated to the angle of the opened state by the bracket member after the center of gravity of the original cover is moved to a high position with the aid of the elastic member, the original cover having a heavy weight can be rotated with a light operating force even in a state where the aid of the elastic member is not provided.

According to the invention described in the fourth example, the 1 st rotation restriction device with high reliability can be realized with a simple configuration. Further, according to the invention described in the fifth example, the 2 nd rotation restriction device with high reliability can be realized with a simple configuration. According to the invention described in the sixth example, the bracket member, which is accurate and highly reliable, can be manufactured at low cost using the metal plate without welding or assembling work.

According to the invention described in the seventh example, the original cover can be rotated with the aid of the elastic member, and the original cover and the support member can be moved integrally. As will be described later, when the thick and heavy original is pressed by the original pressing plate, the engaging portion engages with the lifting member, and the carriage member and the lifting member rotate integrally against the urging force of the elastic member against the support member, so that the original covering plate can horizontally press the thick and heavy original.

According to the invention described in the eighth example, the bracket member formed of the metal plate can be made small and light and the snap-in portion can be easily formed.

According to the invention described in the ninth example, the original cover can be stopped at any angle between the predetermined angle and the open state by the friction mechanism, and a so-called free stop (free stop) function can be realized.

According to the invention described in the tenth example, various machines in which the setting space can be omitted can be provided.

Drawings

Fig. 1 is a perspective view showing a part of an upper side of a complex machine as an example of an office machine using a cover opening and closing device according to the present invention.

Fig. 2 is a side view showing a state in which the cover opening and closing device of the present invention is attached to a multifunction device.

Fig. 3 is an enlarged side view of the lid body opening and closing device shown in fig. 2.

Fig. 4 is a front view of the cover opening and closing apparatus shown in fig. 2 before it is attached to the multifunction device.

Fig. 5 is a perspective view of the cover opening and closing device shown in fig. 4, viewed from the side.

Fig. 6 is an exploded perspective view showing the opening and closing device of the cover according to the present invention.

Fig. 7 shows a coupling member or an actuating member of the cover opening and closing apparatus of the present invention, in which (a) is a perspective view of the 1 st coupling member; (b) is a perspective view of the 2 nd joining member; (c) is a perspective view of the actuating member.

FIG. 8 is a view showing an explanatory configuration of a bracket member according to embodiment 1; wherein (a) is a plan view; (b) is a front view; (c) is a side view.

Fig. 9 is a longitudinal sectional view of the cover opening/closing device shown in fig. 3.

Fig. 10 shows a state in which the cover opening and closing device shown in fig. 3 is opened to 30 degrees, in which (a) is a side view thereof; (b) is a longitudinal sectional view thereof.

Fig. 11 shows a state in which the cover opening and closing device shown in fig. 3 is opened to 60 degrees, in which (a) is a side view thereof; (b) is a longitudinal sectional view thereof.

Fig. 12 is a side view of a state in which the cover opening and closing device of fig. 3 is used and the cover is opened to 90 degrees; (b) is a longitudinal sectional view thereof.

Fig. 13 is a side view illustrating the operation of the cover opening/closing device shown in fig. 3 when the document is a thick document such as a book; (b) is a longitudinal sectional view thereof.

Fig. 14 is an explanatory view showing a case where the original cover is fully opened when the multi-function machine using the cover opening and closing device of the present invention is installed on a wall.

Fig. 15 is an explanatory view showing a case where the document platen is fully opened when a multi-function machine using a known cover opening and closing device is set against a wall.

Detailed Description

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

In the following description, although an example of the cover opening and closing device used in a copying machine or a multifunction machine is described, the cover opening and closing device described below can be widely used as a cover opening and closing device for a printer other than a copying machine or a multifunction machine, an office machine such as a facsimile machine or a scanner, a cabinet, or the like, as described above. Therefore, since the object of the present invention is not limited to the cover opening and closing device used in the copying machine or the multi-function machine, the original cover is referred to as a cover, the invention is referred to as a cover opening and closing device, and the device using the cover opening and closing device is referred to as various devices. In the description and claims of the present specification, these terms are mixed together, but the three terms have the same meaning.

In addition, the terms of the mounting member 1, the support member 2, the elevation member 6, the pressure receiving member 5, the actuating member 9, the elastic member 12, the bracket member 21, and the like described in the present specification and claims are not limited to the specific mounting member 1, the support member 2, the elevation member 6, the actuating member 9, the elastic member 12, and the bracket member 21 used in this embodiment, and are broader concepts than those described below.

Examples

Referring to the drawings, first, as shown in fig. 1, a cover C provided with an automatic document feeder C is openably and closably attached to an apparatus main body D of a copying machine a according to the present invention by a pair of cover opening and closing devices B, B'. In the pair of cover opening/closing devices B, B', since the load applied when the cover opening/closing device B on the left side in the drawing performs the opening/closing operation on the heavy mechanism portion side of the automatic document feeder c is large, a double coil spring system in which two coil springs are arranged side by side is adopted as the elastic member (12) thereof. On the other hand, since the load on the right cover opening and closing device B' is relatively small in the drawing, although not shown, the elastic member (12) is of a single coil spring type composed of one coil spring or a torsion spring (torsion spring) is used. However, since the structure around the bracket member (21) is an essential part of the present invention and basically has the same structure, the left lid opening and closing device B will be described below. In addition, in other office machines such as a large-sized complex machine, since the weight of the cover C is increased, the coil springs of different diameters can be used in a concentric manner regardless of whether the coil springs are double coil springs or single coil springs.

Next, as shown in fig. 2, in a state where the cover C is closed, the cover C is parallel to the original placement table D of the apparatus main body D and is in close contact with the original placement table D to prevent light leakage. As shown in fig. 14, with the cover opening and closing device B of the present invention, since the cover C does not protrude from the rear of the device body D when the cover C is in the fully opened state (90 degrees), when the copying machine a is disposed adjacent to a wall portion or the like, it is not necessary to reserve a space for the cover C to protrude rearward, and therefore, the installation space of the office machine can be omitted.

As shown in fig. 3 to 6, the cover opening and closing device B of the present invention includes: a mounting member 1 mounted on the device body D side; a support member 2 pivotally connected to both side plates 1b, 1b of the mounting member 1 by a first connecting member 3; a lifting member 6 pivotally connected to the two side plates 2b, 2b on the free end side of the support member 2 via a 2 nd connecting member 4 so as to be rotatable in the direction opposite to the support member 2; a cam slider 10 slidably provided in the support member 2 in contact with the pressure receiving member 5 provided between the both side plates 1b, 1b of the mounting member 1; a spring seat member 11 that is slidably provided in the support member 2 in contact with the actuating member 9, the actuating member 9 being provided on a free end side of the elevation member 6 with respect to the support member 2; an elastic member 12 elastically provided between the cam slider 10 and the spring receiving member 11; and a bracket member 21 pivotally connected to the two side plates 6b, 6b of the elevation member 6 and the two side plates 2b, 2b of the support member 2 by a 2 nd connecting member 4, the cover C being mounted on the bracket member 21 so as to be rotatable in a direction opposite to the elevation member 6; wherein this bracket member 21 has a rotation control means configured to operate together with the elevation member 6 within a predetermined rotation angle range of the elevation member 6, but to be separately rotatable when the elevation member 6 exceeds the predetermined rotation angle.

The mounting member 1 includes the following members: a mounting base 1a mounted on the apparatus main body D; two

side plates

1b, 1b bent from both side ends of the mounting base 1a in an upward direction (including a direction substantially orthogonal thereto) orthogonal to the mounting base 1 a; and a substantially rectangular back plate 1c which is bent upward (including a substantially orthogonal direction) from one end (rear end) of the mounting base 1a to be orthogonal to the mounting base 1a, and which has engaging

plates

1j, 1j provided on both side portions thereof engaged with

engaging grooves

1i, 1i provided on both

side plates

1b, 1b of the mounting member 1. A stopper plate 8 is attached to this back plate 1C by mounting

screws

8a, 8a as a 1 st rotation restricting means E for restricting a maximum angle (60 °) of the support member 2 at the time of opening and closing operation of the cover C.

The 1 st coupling

member mounting holes

1d and 1d are through holes for rotatably mounting the 1 st coupling member 3. In the embodiment, as shown in fig. 7(a), the 1 st coupling member 3 is provided with a metal round bar having

peripheral grooves

3d, 3d at both ends thereof, and the 1 st coupling member insertion holes 2E, 2E of the support member 2 are coupled by passing through the bearing holes 3E, 3E of the bearing members 3a, 3a attached to the 1 st coupling

member attachment holes

1d, 1d of the attachment member 1, and the 1 st coupling member 3 is prevented from coming off by fitting the E-rings 3c, 3c into the

peripheral grooves

3d, 3d provided at both ends protruding from the 1 st coupling member insertion holes 2E, 2E by the

spacers

3b, 3 b.

The 1 st coupling member 3 may be divided into two parts, and the two

side plates

1b, 1b of the mounting member 1 and the two

side plates

2b, 2b of the support member 2 are coupled to each other at a common axial center. The two

side plates

1b, 2b, and 2b are connected by holes, respectively.

In the embodiment, the compression

member mounting holes

1e, 1e are through holes for allowing the compression member 5 to be non-rotatably mounted. The structure of the pressure receiving member 5 includes: a compression pin 5a made of metal, pivoted between the two

side plates

1b, 1b of the mounting member 1; and a synthetic resin roller 5b, the pressure pin 5a passing through an insertion hole 5d provided in an axial direction thereof so as to be rotatably mounted on the pressure pin 5 a. After the pressure receiving pins 5a are inserted into the pressure receiving member mounting holes 1e, both end portions thereof are caulked and fixed to the pressure receiving

member mounting holes

1e, 1e of the mounting member 1. Further, the pressure receiving pin 5a may be prevented from coming off by using the E-ring 3c, or the pressure receiving pin 5a may be rotatably attached to the pressure receiving member attachment holes 1E, 1E.

The cylindrical side surface of the roller 5b abuts against the cam portion 10a of the cam slider 10. Grease (not shown) is applied to the contact surface between the cam portion 10a and the roller 5 b. The material of the roller 5b is not limited to synthetic resin, and may be sintered metal, ceramic, machined product, or the like.

The pressure receiving member 5 may be integrally or wholly constituted by the pressure receiving pin 5a and the roller 5b, and may be rotatably attached to the pressure receiving

member attachment holes

1e, 1 e. The cam portion 10a may be formed in a curved R-shape, or may be formed in a shape in which the sliding portion side of the roller 5b abutting on the cam portion 10a and the R-shape of the cam portion 10a are in surface contact. The pressure receiving member 5 may be a synthetic resin cylinder coated with a metal shaft, and may include a fixing piece projecting from the cylinder toward the 1 st connecting member 3.

When the mounting base 1a is mounted to the apparatus body D, the mounting holes 1g and 1h provided in the mounting base 1a are through holes through which the mounting screws 1m are inserted.

The support member 2 includes the following members: a back plate 2 a; two

side plates

2b, 2b bent downward from both end portions of the back plate 2 a; and holding

plates

2c, 2c formed by bending inward from the lower end sides of the two

side plates

2b, 2 b. As described above, the both

side plates

2b, 2b are rotatably coupled to the both side plates 1b of the mounting member 1 through the first coupling member 3. 1 b. The free end sides of the two

side plates

2b, 2b are pivotally connected to the lifting member 6 in the opposite direction to the support member 2 by the 2 nd connecting member 4, and as shown in fig. 6, when the lifting member 6 is reversed, the

guide grooves

2d, 2d provided on the free end sides of the two

side plates

2b, 2b allow the two end sides of the actuating member 9 to enter.

The 2 nd coupling

member insertion holes

2f and 2f are through holes through which the 2 nd coupling member 4 is inserted. In particular, as shown in fig. 7(b), the 2 nd coupling member 4 has a D-shaped cut surface 4D at one end and

peripheral grooves

4c, 4c formed at both ends, and is a metal round bar in which the shaft 4a is inserted through the 2 nd coupling

member insertion holes

2f, 2f of the support member 2, the 2 nd coupling member linking holes 6D, 6D of the elevation member 6, and the 2 nd coupling

member linking holes

21e, 21e of the bracket member 21, so that the elevation member 6 and the bracket member 21 are rotatably coupled to the support member 2, and the support member 2 is rotated in a direction opposite to the rotation direction of the support member 2 with respect to the mounting member 1. The arc-shaped members provided on both sides of the 2 nd coupling

member insertion holes

2f and 2f of the both

side plates

2b and 2b are

convex portions

2m and 2m for taking a gap.

The 2 nd coupling member 4 has

peripheral grooves

4c, 4c at both ends thereof, and the bearing members 4s, 4s and the spacers 4p, 4p are interposed between the 2 nd coupling

member linking holes

6d, 6d and the 2 nd coupling

member linking holes

21e, 21 e. Here, the bearing members 4s and 4s support the 2 nd connecting member 4, and the spacers 4p and 4p ensure a uniform distance between the vertically movable member 6 and the support member 2. The 2 nd coupling member 4 prevents the 2 nd coupling member 4 from falling off from the elevation member 6 by fitting the E-rings 4b, 4b into the

peripheral grooves

4c, 4c protruding from both end portions of the 2 nd coupling member linking holes 21E, 21E.

The 2 nd connecting member 4 may be divided into two parts, and the two

side plates

2b, 6b, 21b of the support member 2, the lifting member 6 and the bracket member 21 may be connected to each other individually with a common axis. In some cases, perforations may also be used. A friction mechanism including a friction washer or a spring washer of a known structure may be provided as a friction torque generating device between the

side plates

2b and 2b of the support member 2, the

side plates

6b and 6b of the vertically movable member 6, and the

side plates

21b and 21b of the bracket member 21, which are linked by the 2 nd connecting member 4. With the above configuration, it is desirable to more surely prevent only the rotation of the bracket member 21 and perform a stable opening and closing operation particularly at the time of opening and closing the lid body C.

As described above, the 1 st coupling

member insertion holes

2e and 2e are through holes through which the 1 st coupling member 3 is inserted. The stopper holes 2g, 2g are through holes for inserting a stopper pin (not shown) when the support member 2 is assembled and for holding the elastic member 12 in a compressed state between the cam slider 10 and the spring seat member 11.

The

escape grooves

2h, 2h of the support member 2 are through grooves, one ends of which are open to the rear end portion of the back plate 2a, and when the lid body C is opened, spaces are formed into which the

stopper pieces

8f, 8f of the stopper plate 8 enter as shown in fig. 5 and 6.

The structure of the lifting member 6 includes: a back plate 6 a; and two

side plates

6b and 6b bent from both ends of the back plate 6a in a downward direction (including a direction substantially perpendicular thereto) perpendicular to the back plate 6a, respectively, so as to cover the support member 2 from the outside as shown in fig. 4 and 5. A rod-shaped actuating member 9 is attached to the lifting member 6 at the side pivotally connected to the 2 nd connecting member 4 so as not to be rotatable.

As shown particularly in fig. 7(c) in the embodiment, the actuating member 9 is formed of a round rod made of metal, and has a D-shaped cutting face 9c on one end side. The actuator member 9 is fixed to the elevation member 6 by penetrating it into the actuator

pin coupling holes

6e, 6e and caulking both end portions.

Instead of using a metal round bar as it is, the actuating member 9 may be a cylindrical abutting member attached to the metal round bar, or the cross-sectional shape of the cylindrical abutting member may be formed in an elliptical shape or a rectangular shape other than a circular shape. The actuating member 9 may further be rotatably mounted between the two

side plates

6b, 6 b. Further, the lifting member 6 may be provided with a top plate, and the top plate may be bent inward to constitute an actuating member, or may be made of synthetic resin. It may also be mounted between the two

side panels

6b, 6b or on the top or back panel 6 a.

The

escape grooves

6g, 6g of the elevation member 6 are through grooves, one ends of which are open to the rear end portion of the back plate 6a, and form spaces into which the

stopper pieces

8f, 8f of the stopper plate 8 enter when the lid body C is opened, as shown in fig. 6.

The height adjusting device 7 has a structure including: an adjusting screw 7a attached to the back plate 6 a; and a nut 7 b. The height adjusting device 7 finely adjusts the height (inclination) of the cover C relative to the original placement table d (contact glass) in the closed state, and the cover C is fixedly disposed so as to be uniformly pressed against the upper surface of the original placement table d (contact glass).

As shown in fig. 8, the support member 2 is surrounded by a back plate 2a, two side plates 2b, and holding plates 2C, and has a C-shaped cross section, and the cam slider 10 and the spring receiving member 11 are slidably received in the expansion and contraction direction of the elastic member 12.

The cam slider 10 and the spring receiving member 11 are each formed in a cylindrical shape having a bottom surface with a substantially rectangular cross section, and are accommodated in the support member 2 such that the

openings

10b, 10b and the

openings

11b, 11b face each other.

The cam portion 10a of the cam slider 10 is pressed against the pressure receiving member 5. As shown in fig. 6 or 9, at the end portion of the cam slider 10 on the pressure receiving member 5 side, a cam portion 10a inclined in one direction and having a flat upper surface is provided, and a cover portion 10c for covering the exposed side of the pressure receiving member 5 is provided.

The abutment portion 11a of the spring seat member 11 is pressed against the actuating member 9. As shown in fig. 6, an abutting portion 11a is provided so as to swell at an end portion of the spring seat member 11 on the side of the actuating member 9. However, the abutting portion 11a is not necessarily provided as shown in the figure, and may be a flat portion over the entire surface.

The cam slider 10 is pressed against the pressing member 5 fixed to the mounting member 1 and presses and compresses the elastic member 12. When the support member 2 rotates about the 1 st coupling member 3 with respect to the mounting member 1 in the opening direction of the lid C, the cam slider 10 moves in the direction of the arrow R3 to reduce the compression of the elastic member 12. Therefore, the elastic member 12 applies an auxiliary force to the support member 2 and the elevation member 6 to reduce a force required to open the cover (C).

As shown in fig. 6, an elastic member 12 is held under pressure between the cam slider 10 and the spring receiving member 11, and the elastic member 12 is composed of large-diameter coil springs 12a and small-diameter coil springs 12b and 12 b. The elastic member 12 has a large elastic coefficient by coaxially overlapping the small-diameter coil springs 12b and 12b inside the large-

diameter coil springs

12a and 12a, and pushes the cam slider 10 and the spring receiving member 11 in directions away from each other.

The elastic member 12 is elastically accommodated in the support member 2 in a state where both end portions are inserted into the

openings

10b, 10b of the cam slider 10 and the

openings

11b, 11b of the spring receiving member 11. In addition, the number of the coil springs constituting the elastic member 12 may be 1 or 2 or more, and the arrangement may be parallel or serial. For example, there may be 2 parallel connections, 2 serial connections, or only 1, etc.

FIG. 8 is a view showing an explanatory configuration of a bracket member 21 according to embodiment 1; wherein (a) is a plan view; (b) is a front view; (c) is a side view. Fig. 9 is an explanatory view of the cover opening/closing device B of embodiment 1 in a closed state. Fig. 10 is an explanatory view showing a state where the cover opening/closing device B of embodiment 1 is opened to 30 degrees. Fig. 11 is an explanatory diagram showing a state in which the lid body opening and closing device B of embodiment 1 is opened to 60 degrees.

As shown in fig. 14, in the copying machine a of example 1 which is an example of various kinds of machines such as a multifunction peripheral, the supporting member 2 is stopped at a position rotated by 60 degrees with respect to the mounting member 1, and the cover C is rotated by a total of 90 degrees with respect to the apparatus main body D by rotating the tray member 21 by 30 degrees from this position, thereby obtaining an opened state of the cover C. In order to control the rotation of the support member 2 and the bracket member 21, a first rotation restricting device E is provided for restricting the rotation angle of the support member 2 with respect to the mounting member 1 to 60 degrees; and second rotation restricting means F for restricting the rotation angle of the bracket member 21 with respect to the support member 2 to 30 degrees. Here, the combination of the angle values of 60 degrees +30 degrees to 90 degrees is an example, and may be designed arbitrarily, for example, 50 degrees +50 degrees to 100 degrees.

Referring to fig. 6 and 8, in the lid body opening and closing device B according to embodiment 1, the bracket member 21 has

attachment bases

21a, 21a and is attached to the lid body (C); and two

side plates

21b, 21b erected from the mounting bases 21a, and the two

side plates

21b, 21b are pivoted to free end sides of the two

side plates

2b, 2b of the support member 2 so as to be rotatable in a direction opposite to the elevating member 6. The

side plates

21b and 21b are formed by bending from both ends of the connecting side plate 21c in a horizontal direction (including a direction substantially perpendicular to the connecting side plate 21 c).

The mounting

bases

21a and 21a fixed to the lid C are formed by bending the two

side plates

21b and 21b outward in a horizontal direction (including a direction substantially perpendicular thereto) perpendicular to the mounting

bases

21a and 21a, respectively.

Since the bracket member 21 is pivotally connected to the support member 2 by the 2 nd connecting member 4, as shown in fig. 10 and 13, the bracket member 21 and the elevation member 6 can integrally rotate with respect to the support member 2 around the 2 nd connecting member 4.

Since the bracket member 21 is provided outside the both

side plates

6b, 6b of the vertically movable member 6, the bracket member 21 can be freely rotated with respect to the support member 2 regardless of the rotation state of the vertically movable member 6 with respect to the support member 2.

As shown in fig. 8, the bracket member 21 has a coupling side plate 21c which connects the

opposite side plates

21b, 21b between the 2 nd coupling member 4 and the mounting base 21a, and the mounting base 21a of the bracket member 21 is bent outward from the

opposite side plates

21b, 21 b. Therefore, as shown in fig. 13, the bracket member 21 can rotate integrally with the support member 2 without being disturbed by the elevation member 6 regardless of the angle of the elevation member 6 with respect to the support member 2.

As shown in fig. 13(a), the bracket member 21 has a one-way engagement portion 21d that transmits the rotation of the bracket member 21 in the closing direction about the 2 nd coupling member 4 to the lifting member 6, but does not transmit the rotation of the bracket member 21 in the opening direction to the lifting member 6. Therefore, when the thick document M is pressed by the cover C, the carriage member 21 rotates integrally with the elevation member 6. The bracket member 21 and the elevation member 6 are integrally rotated until the opening angle of the lid C reaches 60 degrees. However, when the opening angle of the cover C is 60 degrees or more, the rotation of the support member 2 with respect to the mounting member 1 will be limited to 60 degrees by the 1 st rotation limiting means E, so the bracket member 21 will be separated from the catching portion 21d of the elevation member 6 and rotated alone. Therefore, the cover C can freely rotate in the range of 60 degrees to 90 degrees.

Specifically, as shown in fig. 8 (a) and (b), the engaging

portions

21d and 21d … are formed by bending portions of the

side plates

21b and 21b of the bracket member 21 inward so as to engage with the

side plates

6b and 6b of the vertically movable member 6 from below. The reason for this is that when the lid body C is opened, the bracket member 21 to which this lid body C is attached seems to rotate alone with the 2 nd coupling member 4 as a fulcrum, but because this bracket member 21 is rotationally pushed in the opening direction of the lid body C with the 1 st coupling member 3 as a fulcrum by the elastic force of the elastic member 12 acting on the actuating member 9, the bracket member 21 rotates together with the support member 2 to rotate in the opening direction of the lid body C to assist the opening action of the lid body C.

When the cover C is opened to 60 degrees, the support member 2 is prevented from further rotating by the 1 st rotation-restricting means E, but the member 21 has no means for preventing the cover C from further opening, so that the bracket member 21 is only rotated about the 2 nd coupling member 4 as a fulcrum, and the opening operation of the cover C attached to the bracket member 21 is permitted. However, the carrier stops the rotation of the carrier member 21 from 60 degrees by the 2 nd rotation restricting means F at the opening angle of 90 degrees of the lid body. That is, by the

projection portions

21f, 21f abutting against the projection portions (abutting portions) 6k, 6k of the vertically movable member 6, further rotation of the bracket member 21 by the 2 nd coupling member 4 is blocked. Since the center of gravity of the lid C moves to the front side at the opening angle at which the maximum opening angle is 90 degrees, the open state of the lid C is stable and does not close naturally, and therefore, it is easy to perform maintenance and inspection of the apparatus main body D safely. In addition, a thick and heavy original M such as a book removed on the original placement table d can be easily placed.

When the lid C opened to the maximum opening angle (90 degrees in the embodiment) is closed, the bracket member 21 is reversed with the 2 nd coupling member 4 as a fulcrum when a hand is placed on the front end portion of the lid C and pulled in the closing direction, so that the lid C can be closed. When the cover C is closed to 60 degrees, the engaging

portions

21d, 21d of the bracket member 21 engage with the two

side plates

6b, 6b of the lifting member 6, and rotate together with the support member 2 about the 1 st connecting member 3 as a fulcrum against the elastic force of the elastic member 12 acting on the actuating member 9, so that the cover C can be closed without suddenly sliding down. When the cover C is closed to about 20 degrees, the weight of the cover C will overcome the elastic force of the elastic member 12, and the cover C will be closed with its own weight.

Next, as shown in fig. 13(a), when the thick and heavy original M such as a book is placed on the original placement table d (contact glass) and the cover C is pressed downward, the lifting member 6 which rotates about the 2 nd coupling member 4 with the thick and heavy original M as a fulcrum rotates in the direction opposite to the rotation direction of the support member 2 against the elastic force of the elastic member 12 acting on the actuator member 9 together with the carriage member 21, that is, the upper surface of the thick and heavy original M is horizontally covered to prevent exposure leakage to the outside. By releasing the pressing, this reversed cover C is pushed back to the original position by the elastic force of the elastic member 12 acting on the actuating member 9. Therefore, the cover opening/closing device B can stably and uniformly press the original on the upper surface of the original placement table D of the device main body D regardless of the thickness of the original.

As shown in fig. 9, the 1 st rotation restricting device E restricts the rotation angle of the support member 2 from the closed state of the lid body C to a predetermined angle (60 degrees) smaller than the angle (90 degrees) of the open state. As shown in fig. 6, this 1 st rotation restricting means E is constituted by a stopper plate 8 mounted on a back plate 1c of the mounting member 1 with mounting screws 8a, the mounting

screws

8a, 8a being fixed to

female screws

1n, 1n of the back plate 1c through fixing holes 8E, 8E of the stopper plate 8.

The configuration of the stopper plate 8 includes: a mounting substrate portion 8 b; and

stopper pieces

8f, 8f formed by bending from both side portions of the mounting substrate portion 8b and having a pair of

convex portions

8c, 8c and protruding

portions

8d, 8 d. The back plate 1c is provided with a pair of positioning bosses 1k, 1k fitted into fixing holes 8g, 8g provided in the stopper plate 8.

In addition, the stop plate 8 may also be provided integrally with the back plate 1c of the mounting member 1, or may also be an abutment shaft or a pair of pins provided in parallel with the actuating member 9 abutting on the support member 2 to limit the angle of the support member 2. In the case of the abutment shaft, a friction portion may be provided for applying a frictional force to an elastically bent portion or the abutment shaft, and the elastically bent portion elastically receives the abutment shaft at an upper portion of the stopper plate 8.

As shown in fig. 12, the 2 nd rotation restricting means F restricts the rotation angle of the tray member 21 from the state of being restricted to the predetermined angle (60 degrees) to the angle (30 degrees) obtained by subtracting the predetermined angle (60 degrees) from the angle (90 degrees) in the open state by the 1 st rotation restricting means E. As shown in fig. 12(b), the 2 nd rotation restricting means F is provided on the elevation member 6, and when the lid body C is rotated from the closed state (0 degrees) to the open state (90 degrees), the protrusion portion 6k abuts against the protrusion portion 21F of the holder member 21 to restrict the rotation of the holder member 21.

Although the rotation control device of the bracket member 21 according to the first to third and fifth examples is not particularly described with reference numerals, the structure thereof includes the 1 st rotation restriction device E, the 2 nd rotation restriction device F and the elastic member 12 described above, and the rotation angle of the support member 2 is restricted to 60 degrees by the 1 st rotation restriction device E as described above, and thus the bracket member 21 starts to rotate 90 degrees with respect to the cover C. In addition, the rotation angle of the bracket member 21 is limited to 90 degrees by the 2 nd rotation limiting means F. Therefore, when the cover C is opened and closed from 0 to 60 degrees by the elastic member 12, the support member 2 is also opened and closed.

Next, the operation of the lid opening and closing device B of example 1 will be described.

As shown in fig. 3 and 9, when the lid C is in the closed state (0 degrees), the lid C is closed against the elastic force of the elastic member 12 mainly by the weight of the lid C, and the closed state is maintained stably. Here, the cam portion 10a of the cam slider 10 is provided with an inclination as shown by a broken line 10k, and the lid C can be rotationally pushed in the closing direction by the structure in which the cam slider 10 is pressed obliquely downward by the pressure receiving member 5. When the lid C is in the closed state (0 degrees), the pressure receiving member 5 receives the elastic force of the elastic member 12 in the most compressed state by the cam slider 10.

When the lid C is opened from the closed state, the support member 2, the lifting member 6, and the bracket member 21 are always rotationally pushed in the direction of opening the lid C by the elastic member 12, so that the bracket member 21 rotates together with the support member 2 and the lifting member 6 without being reversed, and the lid C can be opened. This opening angle is within a range of 20 to 60 degrees in which the rotational torque generated around the 1 st coupling member 3 by the lid C and the hinge torque held by the lid opening/closing device B are balanced, and the lid C does not naturally fall even if the hand is released from the lid C. Therefore, the original can be placed on the original placement table d with both hands. The self-standing holding angle of the lid C is not limited to the holding angle in this embodiment. As shown in fig. 11(b), in the process of opening the lid body C from the closed state to the predetermined angle (60 degrees), since the elastic member 12 continuously pushes the pressure receiving member 5 to the outside through the cam slider 10, the lid body C is opened from the closed state to the predetermined angle (60 degrees) in a state where its original weight is reduced, is restricted from rotating and stopped at the predetermined angle (60 degrees) by the 1 st rotation restricting means E. In the process of opening the lid C to a predetermined angle (60 degrees) from the closed state, since the compression member 5 moves in the direction away from the cam slider 10, the compression length of the elastic member 12 is elongated, so that the force of the elastic member 12 to open the lid C by the cam slider 10 is reduced.

However, since the moment of weight (moment) of the lid C around the 1 st coupling member 3 becomes smaller as the opening angle increases, the force of the elastic member 12 to open the lid C by the cam slider 10 can be reduced. In view of this, the elastic member 12 is designed to maintain a state of a predetermined angle (60 degrees) even without supporting the cover C with hands. Further, when the opened lid C is closed, the bracket member 21, which receives the downward rotational thrust by the elastic force of the elastic member 12, is engaged with the lower end portions of the two

side plates

6b and 6b of the vertically movable member 6 by the engaging

portions

21d and 21d …, and therefore, the closing operation of the lid C can be smoothly performed without rotating only the bracket member 21 but rotating together with the vertically movable member 6. Further, at an opening angle of about 20 degrees, the cover C naturally closes because the rotational torque due to its own weight exceeds the hinge torque.

As shown in fig. 11(b), by further opening the lid body C held at the predetermined angle (60 degrees) from the predetermined angle (60 degrees) to the open state (90 degrees), the elastic member 12 continuously pushes the pressure receiving member 5 outward through the cam slider 10 and holds the support member 2 at the predetermined angle (60 degrees).

The bracket member 21 is rotatable about the 2 nd coupling member 4 with respect to the support member 2 held at a predetermined angle (60 degrees) by the 1 st rotation restricting device E, and rotates the lid C from the predetermined angle (60 degrees) to the open state (90 degrees).

As shown in fig. 15, the cover opening and closing device H of the prior art is not provided with the bracket member 21, and the mounting plate portion 16C is formed by bending outward from both side plates 16b of the lifting member 16, which is a comparative example of fixing the cover C to the mounting plate portion 16C. In the cover opening and closing device H of the comparative example, since the support member 2 is rotated by 90 degrees in the opened state, the cover C protrudes from the back surface side of the device main body D.

In contrast, in the cover opening and closing device B according to embodiment 1 shown in fig. 14, since the support member 2 can only be rotated up to 60 degrees even in the opened state, the cover C is in the opened state in a state where the cover C is displaced to the front side of the device main body D, as compared with the cover opening and closing device H according to the related art shown in fig. 15.

Therefore, the cover opening/closing device B of example 1 suppresses the amount of protrusion of the cover C toward the rear side of the device body D in the open state, and the dead angle DS to be secured between the device body D and the wall portion K on the rear side is smaller than the cover opening/closing device H of the comparative example.

Next, when closing the lid C opened to the 90-degree fully opened state, first, the bracket member 21 is reversed and the lid C is closed. As shown in fig. 11(a), when the cover C is closed to 60 degrees, the

engagement portions

21d and 21d … of the bracket member 21 engage with the

side plates

6b and 6b of the elevation member 6, so that the bracket member 21 rotates together with the elevation member 6 and the support member 2 to close the cover C.

The present invention is configured as described above, and the rear portion of the cover body attached to the rear portion of the apparatus main body of various apparatuses in an openable and closable manner does not protrude from the rear portion of the apparatus main body even when the cover body is in a fully opened state.

Claims

1. A cover opening and closing device comprises:

a mounting member mounted on the apparatus main body side;

a supporting member rotatably pivoted on the two side plates of the mounting member through a 1 st connecting member;

a lifting member pivotally connected to both side plates on a free end side of the supporting member through a 2 nd connecting member so as to be rotatable in a direction opposite to the supporting member;

a cam slider slidably disposed in the support member in contact with a pressure receiving member disposed between both side plates of the mounting member;

a spring seat member slidably provided in the support member in contact with an actuating member provided on a free end side of the elevation member with respect to the support member;

an elastic member elastically provided between the cam slider and the spring seat member;

a bracket member pivotally connected to both side plates of the elevation member and both side plates of the support member through the 2 nd link member, and a cover body mounted on the bracket member so as to be rotatable in a direction opposite to the elevation member;

a 1 st rotation restricting device provided between the support member and the mounting member to restrict a rotation angle of the support member; and

and a 2 nd rotation restricting device provided between the elevation member and the bracket member to restrict a rotation angle of the bracket member.

2. The cover opening and closing device according to claim 1, wherein the rotation control means of the tray member is constituted by:

the 1 st rotation restricting device disposed between the support member and the mounting member;

the 2 nd rotation limiting device is arranged between the lifting component and the bracket component; and

the elastic member acts on the actuating member.

3. The cover opening and closing device according to claim 2, wherein the 1 st rotation limiting means is constituted by a stopper plate provided on the rear side of the mounting member for abutting against the rear side of the support member at a predetermined rotation angle of the support member.

4. The lid opening/closing device according to claim 2, wherein the 2 nd rotation limiting means is formed by engaging portions provided on both side plates of the bracket member for engaging the bracket with both side plates of the elevation member from one direction.

5. The cover opening and closing device according to claim 2, wherein the 2 nd rotation restricting means is constituted by a protrusion provided on the elevation member to abut against a protrusion provided on the tray member to restrict the rotation of the tray member.

6. The lid opening and closing device according to claim 1, wherein the bracket member has a coupling side plate which links opposite side plates of the bracket member at the 2 nd coupling member side, and the mounting base of the bracket member has a shape bent outward from the opposite side plates.

7. The cover opening and closing device according to claim 1, wherein the 1 st rotation limiting device limits the rotation angle of the supporting member with respect to the mounting member to 60 degrees;

the 2 nd rotation restricting means restricts a rotation angle of the bracket member with respect to the support member to 30 degrees.

8. The lid opening/closing device according to claim 4, wherein the bracket member is provided on outer sides of both side plates of the elevation member, and the engaging portion is formed by bending a part of both side plates of the bracket member inward to engage with both side plates of the elevation member.

9. The cover opening and closing device according to claim 1, wherein a friction torque generating device is provided between the bracket member and the elevating member.

10. A variety of machines using the cover opening and closing device according to any one of claims 1 to 9.