Opening and closing support device

Abstract

To provide an opening / closing support device which can prevent exposure of an elastic member and a pressure reception cam part regardless of the time of opening / closing and prevent dropping of oil and grease of the elastic member and the pressure reception cam part to a document or the like.SOLUTION: An opening / closing support device 10 which connects a device body 2 and a document crimping plate 3 in an office machine 1 having the document crimping plate 3 for opening / closing an upper surface of the device body 2, comprises: an attachment member 11 which is attached to the device body side; a support member 12 which is attached to the document crimping plate side; a pressure reception cam part 34; a first slider 14 which is provided in a slidable manner in the support member; a second slider 15 which is provided in a slidable manner in the support member; an elastic member 16 which is elastically provided between the first slider 14 and the second slider 15; and an oil contamination prevention plate 14c which can simultaneously cover the pressure reception cam part side and the elastic member side on the side of the first slider 14.SELECTED DRAWING: Figure 11

Description

Technical Field

[0001] The present invention relates to an opening and closing support device. In particular, it relates to an opening and closing support device used in office equipment such as a copying machine having an original pressing plate, which is further improved compared with the conventionally known ones.

Background Art

[0002] Conventionally, in office equipment such as a copying machine, a scanner or a printer, an original pressing plate is used to press an original on a contact glass and prevent external light from entering the exposure system inside the apparatus body. And, various configurations of opening and closing support devices are known for opening and closing this original pressing plate with respect to the apparatus body.

[0003] Among them, in order to prevent the original from being soiled by oil such as lubricating oil used in the opening and closing support device when placing the original on the contact glass, what is described in Patent Document 1 below is known.

[0004] Furthermore, in a conventionally known opening and closing support device, an elastic member is used to support the original pressing plate in its closed state from suddenly dropping or in its open state. Nevertheless, when placing and removing the original on the contact glass, the original pressing plate that opens and closes cannot prevent suddenly dropping when it is closed or suddenly opening when it is opened. Therefore, what uses a friction mechanism to prevent this is known as what is described in Patent Document 2 below.

[0005] Patent Document 1 below describes a hinge provided with an oil fence that is arranged outside the vicinity of the contact portion between the cam member and the slide member and prevents foreign matter from entering the contact portion side of the slide member and the cam member from the outside of the slide member and the cam member as the second wing member moves from the closed state to the open state. This hinge fails to prevent oil from the pressure-receiving member from adhering to the original document, nor does it prevent oil from leaking from both sides of the oil fence. Furthermore, because the oil fence is a separate part, it complicates the manufacturing process and increases costs. Additionally, it fails to prevent the document pressure plate from rapidly dropping when closed or rapidly opening when opened.

[0006] Patent Document 2 below describes a hinge comprising a first wing member, a cam member, a second wing member, a pressure receiving member, a first slide member, a second slide member, and a spring member, wherein the second slide member has a plate-shaped cover portion that extends toward the first slide member at the lower part when the second wing member is closed relative to the first wing member, and a hole is formed on the surface of the second slide member facing the first slide member into which one end of the spring member is inserted, and the rotation in the hole The description describes a hinge in which an insertion hole is formed near the axial direction of the shaft so as to overlap with the hole when viewed in the axial direction of the pivot shaft, and a projection is formed on the surface of the first slide member facing the second slide member so as to protrude toward the second slide member, and when the second wing member is closed relative to the first wing member, the projection is inserted into the insertion hole of the second slide member, and when the second wing member is open relative to the first wing member, the projection and the tip of the cover overlap. This hinge fails to prevent oil from the pressure-receiving element from adhering to the document, nor does it prevent oil from leaking from both sides of the cover. Furthermore, a downward gap is visible between the tip of the cover and the projection, which can cause oil or grease from the coil spring to fall through this gap onto the document below.

[0007] As a result, we have found that by providing an oil stain prevention plate on the side of the first slider that can simultaneously cover the pressure-receiving cam side and the elastic member side, the exposure of the elastic member (coil spring) and the pressure-receiving cam can be prevented regardless of whether it is open or closed, preventing oil or grease from the elastic member (coil spring) and the pressure-receiving cam from falling onto the document underneath. Furthermore, by providing a cover portion on both sides of the second slider on the oil stain prevention plate, oil leakage from both sides of the oil stain prevention plate can also be prevented. Additionally, by having a friction mechanism, the document pressure plate can be prevented from rapidly falling when it is closed or rapidly opening when it is opened. Based on these findings, we have decided to file this application. [Prior art documents] [Patent Documents]

[0008] [Patent Document 1] Japanese Patent Publication No. 2019-105775 [Patent Document 2] Patent No. 6642885 [Overview of the Initiative] [Problems that the invention aims to solve]

[0009] The objective is to provide an opening / closing support device that can prevent the exposure of the elastic member (coil spring) and the pressure-receiving cam, regardless of whether the device is open or closed, and that can prevent the elastic member (coil spring) from falling onto the document or other materials beneath the oil or grease. A secondary objective is also to provide an opening / closing support device that can prevent the document pressure plate from falling rapidly when closed or opening abruptly when opened. [Means for solving the problem]

[0010] The present invention has the following configuration. (1) An opening and closing support device for an office machine having a document pressure plate that opens and closes the top surface of the main body of the machine, the opening and closing support device for connecting the main body of the machine and the document pressure plate, comprising: a mounting member having a mounting plate attached to the main body of the machine and side plates rising from both sides of the mounting plate; a support member attached to the document pressure plate side having a back plate and side plates hanging down from both sides of the back plate, the side plates being rotatably attached to the side plates of the mounting member via hinge shafts; a pressure receiving cam portion attached to the side plates of the mounting member forward and below the position of the hinge shafts; a first slider slidably provided inside the support member in contact with the pressure receiving cam portion; a second slider slidably provided inside the support member in contact with the free end side of the support member; and an elastic member elastically provided between the first slider and the second slider, wherein an oil stain prevention plate capable of simultaneously covering the pressure receiving cam portion side and the elastic member side is provided on the side of the first slider. (2) The opening and closing support device according to (1), further comprising a back plate and side plates hanging down from both sides of the back plate on the free end side of the support member, and a lift member in which the side plates are rotatably attached to the side plates on the free end side of the support member via a second hinge shaft, wherein the second slider is in contact with an operating member provided on the side of the lift member on the second hinge shaft side. (3) The opening and closing support device according to (1), characterized in that the oil stain prevention plate is further provided with cover portions that cover both sides of the second slider. (4) The opening and closing support device according to (1), wherein the back plate of the support member has a friction mechanism, the friction mechanism has a pair of long convex portions for friction spaced at a predetermined interval, and a convex portion that is shorter than the pair of long convex portions and is located on each end side between the pair of long convex portions, and each of the convex portions presses against the back of the first slider depending on the opening and closing angle when the document pressure plate is opened and closed. [Effects of the Invention]

[0011] The opening and closing support device of the present invention has the configuration described in (1), and in particular, by providing an oil stain prevention plate on the side of the first slider that can simultaneously cover the pressure receiving cam side and the elastic member side, the exposure of the elastic member (coil spring) and the pressure receiving cam can be prevented regardless of whether it is open or closed, and the oil or grease of the elastic member (coil spring) and the pressure receiving cam can be prevented from falling onto documents or the like.

[0012] The opening and closing support device of the present invention, having the configuration described in (2), allows the second slider to slide in conjunction with the movement of the lift member to which the document pressure plate is attached.

[0013] The opening and closing support device of the present invention, by having the configuration described in (3), can prevent oil and grease from leaking from the side of the oil stain prevention plate with two linear cover portions (ribs).

[0014] The opening and closing support device of the present invention, by having the configuration described in (4), can prevent the document pressure plate from rapidly falling when it is closed or rapidly opening when it is opened. [Brief explanation of the drawing]

[0015] [Figure 1] A perspective view showing an example of office equipment using the opening and closing support device of the present invention. [Figure 2] This is a perspective view showing an example of the opening and closing support device of the present invention, and the view shows the device in the open state. [Figure 3] This is a perspective view showing an example of the opening and closing support device of the present invention, and the view shows the closed state. [Figure 4] This is an exploded perspective view showing an example of the opening and closing support device of the present invention. [Figure 5] This figure shows an example of a mounting member for the opening and closing support device of the present invention, and is (a) a plan view, (b) a front view, and (c) a left side view. [Figure 6] This figure shows an example of a support member for the opening and closing support device of the present invention, and is (a) a front view, (b) a bottom view, and (c) a left side view. [Figure 7]A diagram showing an example of the first slider of the opening / closing support device of the present invention, which is (a) a plan view, (b) a front view, and (c) a cross-sectional view taken along line A-A. [Figure 8] A diagram showing an example of the second slider of the opening / closing support device of the present invention, which is (a) a plan view, (b) a perspective view, and (c) a cross-sectional view taken along line B-B. [Figure 9] A front view showing an example of the opening / closing support device of the present invention, which shows the closed state. [Figure 10] A cross-sectional view taken along line C-C showing an example of the opening / closing support device of the present invention, which shows the closed state. [Figure 11] A cross-sectional view taken along line C-C showing an example of the opening / closing support device of the present invention, which shows the open state.

Mode for Carrying Out the Invention

[0016] Hereinafter, an opening / closing support device according to a preferred embodiment of the present invention and an office machine provided with this opening / closing support device will be described with reference to the drawings. In the following description, the front-back, left-right, and up-down directions shown in the orthogonal coordinate system shown in FIG. 1 will be appropriately referred to. In the present invention, office machines include, but are not limited to, copying machines such as copiers and multifunction printers, printers, facsimiles, scanners, and the like.

[0017] (Embodiment 1) In FIG. 1, reference numeral 1 indicates a copier, which is an example of an office machine. Other office machines include multifunction printers, printers machine, facsimiles, scanners, and the like. The office machine 1 is approximately cubeThe device comprises a shaped main body 2, a contact glass 4 on the upper surface 2a of the main body 2, an operating section 5 on the lower right of the upper surface 2a, and a document pressure plate 3 that opens and closes the upper surface 2a of the main body 2. The document pressure plate 3 can be equipped with an automatic document feeder or a lighter version without one. In this embodiment, the version with an automatic document feeder is shown. In this version with an automatic document feeder, the left side is heavier, so the left and right opening / closing support devices usually have different configurations. In this embodiment, the part indicated by reference numeral 10, which is attached to the heavier left side, will be described. The opening / closing support device indicated by reference numeral 10A will not be described. The document pressure plate 3 is attached to the opening / closing support devices 10 and 10A so as to be openable and closable, and in Figure 1, the document pressure plate 3 is shown in the open state. The closed state refers to the state in which the lower surface 3a of the document pressure plate 3 is in contact with the upper surface 2a of the device body 2.

[0018] As shown in Figures 2-4 and 9-11, the opening / closing support device 10 of the present invention includes a mounting member 11, a support member 12, a lift member 13, a first slider 14, a second slider 15, an elastic member (coil spring) 16, a damper 17, a hinge shaft 21, a second hinge shaft 22, an operating member 31, a pressure receiving cam portion 34, and a second elastic member (coil spring) 36.

[0019] "Mounting components" As shown in Figure 5, the mounting member 11 consists of a mounting plate (bottom plate) 11a attached to the device body 2, a pair of side plates 11b, 11b rising upward from both ends of the mounting plate (bottom plate) 11a, and a substantially rectangular rear plate 11c extending from one end (rear end) of the mounting plate (bottom plate) 11a in a direction perpendicular to the mounting plate (bottom plate) 11a. The mounting plate (bottom plate) 11a is formed in a planar, approximately rectangular shape and has a planar keyhole-shaped mounting hole 11g through which the mounting screw 40 (see Figure 10) is inserted and locked, and a mounting hole 11f into which the mounting screw 40 (see Figure 10) is attached. The mounting plate is attached to the rear upper end of the device body 2 by the mounting screw 40. The mounting member 11 is formed by bending a single metal plate that has been processed to a predetermined outer shape.

[0020] The pair of side plates 11b, 11b of the mounting member 11 are provided with holes 11d, 11e, and the hinge shaft 21 and pressure-receiving cam portion 34 are attached to them. The hinge shaft 21 is attached to the hole 11d at the upper rear of the mounting member 11, and the mounting member 11 rotatably supports the support member 12 via this hinge shaft 21. Thus, the mounting member 11 has a mounting plate (bottom plate) 11a attached to the main body of the device and side plates 11b, 11b that rise from both sides of the mounting plate (bottom plate) 11a.

[0021] The pressure-receiving cam section 34 includes a pressure-receiving shaft 33 and a roller member 32 through which the pressure-receiving shaft 33 is detachably inserted. The pressure-receiving shaft 33 is a rod-shaped member with a circular cross-section and is inserted through insertion holes 11e formed in a pair of side plates 11b, 11b. In Figure 5, the indicator symbols 11h and 11j represent holes, and the indicator symbols 11i and 11k represent protrusions.

[0022] The roller member 32 is formed in a cylindrical shape with a circular cavity 32a in the longitudinal direction. The inner diameter of this cavity 32a is larger than the outer diameter of the pressure receiving shaft 33, and the outer diameter of the roller member 32 is larger than the diameter of the insertion hole 11e. Also, the length of the roller member 32 is smaller than the distance between the inner surfaces of the pair of side plates 11b, 11b. When the mounting member 11 is assembled, the roller member 32 formed with these dimensions is first positioned between the pair of side plates 11b, 11b so that the position of the cavity 32a coincides with the insertion holes 11e, 11e. Then, the pressure receiving shaft 33 is inserted through the insertion holes 11e, 11e and the cavity 32a. As a result, the roller member 32 is rotatably supported by the through-pressure receiving shaft 33.

[0023] "Support member" As shown in Figure 6, the support member 12 consists of a back plate (top plate) 12a, a pair of side plates 12b, 12b that hang down from both ends of the back plate (top plate) 12a in directions perpendicular to the back plate (top plate) 12a, and holding pieces 12c, 12c that are bent inward from the lower ends of the pair of side plates 12b, 12b. This creates a storage space 12f inside the support member 12 for accommodating various parts. The support member 12 has holes 12d in the pair of side plates 12b, 12b, and the rear parts of the pair of side plates 12b, 12b are attached to the pair of side plates 11b, 11b of the mounting member 11 via hinge shafts 21. As a result, the support member 12 is rotatably supported by the mounting member 11. The inner surface of the back plate (top plate) 12a is provided with two long, linear convex sections 12e and one short convex section 12k. Furthermore, as suggested in Figures 3, 4, and 6, the indicator symbols 12g, 12h, 12i, and 12j represent holes. Thus, the back panel 12a and this back panel 12a It has side plates 12b, 12b that hang down from both sides of the mounting member 11, and these side plates 12b, 12b are rotatable to the side plates 11b, 11b of the mounting member 11 via a hinge shaft 21. Original Paper pressure bonding board 3 It has a support member 12 that can be attached to the side.

[0024] "Lift component" The lift member 13 is formed by bending a single metal plate that has been processed to a predetermined outer shape. The lift member 13 consists of a back plate (top plate) 13a, a pair of side plates 13b, 13b that hang down from both sides of the back plate (top plate) 13a, and mounting plates 13c, 13c that are bent outward from the lower ends of the pair of side plates 13b, 13b. The lift member 13 has holes 13d in a pair of side plates 13b, 13b, and these side plates 13b, 13b are attached to the free end side (front side) of a pair of side plates 12b, 12b of the support member 12 via a second hinge shaft 22, with an E-ring 42 in between. As a result, the lift member 13 is attached to the support member 12 In contrast It is supported so as to be rotatable. The lift member 13 has holes 13f in the pair of side plates 13b, 13b, and the operating member 31 is attached to them. The support member 12 rotates clockwise around the hinge shaft 21 from the closed position. On the other hand, the lift member 13 rotates counterclockwise around the second hinge shaft 22 from the closed position. Thus, the lift member 13 is mounted to rotate in the opposite direction to that of the support member 12. This lift member 13 is a pair Mounting plate Holes 13e are provided in 13c, 13c, and the rear part of the document pressure plate 3 is attached to the mounting plates 13c, 13c.

[0025] "Means for adjusting height" The lift member 13 has height adjustment screws that constitute the height adjustment means 7 for the document pressure plate 3. 48 and nuts 47 However, it is attached to the female screw portion 46 provided on the back plate (top plate) 13a. height Adjustment screw 48 Its tip is in contact with the back plate (top plate) 12a of the support member 12.

[0026] The lift member 13 is further fitted with an operating member 31 that penetrates the pair of side plates 13b, 13b along the left-right direction. The operating member 31 is a rod-shaped member with a circular cross-section and is located adjacent to the second hinge shaft 22. 、 It is provided on the front of the pair of side plates 13b, 13b.

[0027] In the housing space 12f of the support member 12, a pair of first sliders 14 and second sliders 15, held by the holding pieces 12c, are slidably housed. Between the opposing first sliders 14 and second sliders 15 bullet A coil spring 16 is provided. Bullet One end of the spring member (coil spring) 16 is housed in the first spring housing portion 14b of the first slider 14. bullet The other end of the spring member (coil spring) 16 is housed in the second spring housing portion 15b of the second slider 15. The top surface 14k of one end of the first slider 14 is a cam portion and is in contact with the roller member 32 of the pressure receiving cam portion 34, which is provided between the pair of side plates 11b, 11b of the mounting member 11. In particular, the ring-shaped member and the disc-shaped member are indicated by symbols 52 and 53 in Figure 4. Furthermore, the top surface 15e of the other end of the second slider 15 is pressed against the operating member 31 attached to the second hinge shaft 22 side (front side) of the support member 12. Thus, the mounting member 11 has pressure-receiving cam portions 34 that are mounted forward and downward from the position of the hinge shafts 21 on both side plates.

[0028] "First Slider" As shown in Figure 7, the first slider 14 is housed on the hinge shaft 21 side within the housing space 12f of the support member 12. The first slider 14 includes a first spring receiving portion 14a and an oil stain prevention plate 14c. The oil stain prevention plate 14c is integrated with one side of the first spring receiving portion 14a, extends from the first spring receiving portion 14a side to the second hinge shaft 22 side, and has a tip portion 14h that extends toward the second hinge shaft 22 side, as well as an end portion 14i that extends from the first spring receiving portion 14a side to the hinge shaft 21 side. The first spring receiving portion 14a is provided with a first spring housing portion 14b and two notches 14j. One end of the elastic member (coil spring) 16 is fitted into the first spring housing portion 14b, and when closed, the protruding portion 15c of the second slider 15 is fitted into the notches 14j. The oil stain prevention plate 14c has a surface 14f and a back surface 14g. The surface 14f has six linear ribs 14d that protrude vertically and run parallel and at equal intervals, and the back surface 14g has two linear cover portions (ribs) 14e that protrude vertically and run along the edge of the oil stain prevention plate 14c. The six linear ribs 14d ensure the horizontality of the oil stain prevention plate 14c and ensure the movement of the moving mechanism. The two linear cover portions (ribs) 14e prevent oil and grease from leaking from the sides of the oil stain prevention plate 14c. 。 The The top surface 14k at one end of the spring receiving portion 14a is a cam portion, which presses against the pressure receiving cam portion 34. The upper surface of the first spring receiving portion 14a is the back portion 14m. Thus, an oil stain prevention plate 14c is provided on the side of the first slider 14 that can simultaneously cover the pressure-receiving cam portion side and the elastic member side. The first slider 14 is also provided to slide inside the support member in contact with the pressure-receiving cam portion 34.

[0029] "Second slider" As shown in Figure 8, the second slider 15 is housed on the second hinge shaft 22 side within the housing space 12f of the support member 12. The second slider 15 is equipped with a second spring receiving portion 15a, which has a second spring housing portion 15b and two protrusions 15c. The other end 16b of the elastic member (coil spring) 16 is fitted into the second spring housing portion 15b, and the protrusions 15c are fitted into the notch 14j of the first slider 14 when it is in the closed position. The other end top surface 15e of the second slider 15 is pressed against the operating member 31 attached to the second hinge shaft 22 side (front side) of the support member 12. Thus, the support member 12 has a second slider 15 that is slidably provided inside the support member, in contact with the free end of the support member 12.

[0030] "Elastic component (coil spring)" The elastic member (coil spring) 16 has one end 16a fitted into the first spring housing portion 14b of the first spring receiving portion 14a, and the other end 16b fitted into the second spring housing portion 15b of the second spring receiving portion 15a. As shown in Figures 4, 10, and 11, in this embodiment, a left-handed second elastic member (coil spring) 36 is also inserted between a right-handed elastic member (coil spring) 16 and a damper 17, extending from the second slider 15 to the first slider 14. It is preferable to reverse the winding directions of the elastic member (coil spring) 16 and the second elastic member (coil spring) 36. This allows for finer adjustment of the elastic force. The elastic member (coil spring) 16 may be left-handed, and the second elastic member (coil spring) 36 may be right-handed. If adjustment of the elastic force is not particularly necessary, the configuration may be made without the second elastic member (coil spring) 36. Thus, it has an elastic member 16 elastically positioned between the first slider 14 and the second slider 15.

[0031] "Damper" The damper 17 is positioned coaxially within the helix of a second elastic member (coil spring) 36, which is positioned coaxially within the helix of an elastic member (coil spring) 16.

[0032] "Operating member, pressure-receiving cam section" The operating member 31 is attached to the lift member 13. The pressure-receiving cam section 34 consists of a pressure-receiving shaft 33, which serves as the axis, and a roller member 32, and is attached to the mounting member 11. When the second slider is opened from the closed position, the operating member 31 moves to the second slider. 15 The other end top surface 15e is pressed, and the pressure-receiving cam portion 34 receives pressure at the one end top surface 14k of the first slider 14. Opening and closing support device 10 Furthermore, the support member 12 has a back plate 13a and side plates 13b, 13b hanging down from both sides of the back plate 13a on the free end side, and a lift member 13 in which these side plates 13b, 13b are rotatably attached to the side plates 12b, 12b on the free end side of the support member 12 via a second hinge shaft 22, and the second slider 15 is in contact with an operating member 31 provided on the side of the lift member 13 that is on the second hinge shaft 22 side.

[0033] "A mechanism that can simultaneously cover both the pressure-receiving cam side and the elastic member side on the first slider side." As shown in Figures 10 and 11, when the document pressure plate 3 is moved from the closed state to the open state, the second slider 15 moves in a direction away from the first slider 14. Whether in the closed or open position, when viewed from a direction perpendicular to the surface 14f of the oil stain prevention plate 14c, the tip portion 14h of the oil stain prevention plate 14c extending toward the second hinge shaft 22 covers the opening tip portion 15d of the second slider 15. This prevents the exposure of the elastic member (coil spring) 16 regardless of whether it is open or closed, and covers the elastic member (coil spring) in a way that scoops up the oil or grease from falling onto the document or other object underneath, thereby preventing the oil or grease from falling onto the document or other object. Furthermore, the rear end portion 14i of the oil stain prevention plate 14c that extends toward the hinge shaft 21 covers the axial center O of the pressure receiving cam portion 34. This prevents the pressure receiving cam portion 34 from being exposed whether it is open or closed. 34 This prevents oil or grease from falling onto documents or other materials. In other words, the mechanism on the first slider side can simultaneously cover both the pressure-receiving cam side and the elastic member side, preventing the elastic member (coil spring) and the pressure-receiving cam from being exposed whether the device is open or closed, and preventing the elastic member (coil spring) and the pressure-receiving cam from falling onto documents or other materials under the oil or grease.

[0034] "Friction mechanism" The back plate 12a of the support member 12 has a friction mechanism, which has a pair of long convex portions 12e for friction spaced at a predetermined interval, and shorter convex portions 12k located on each end side between the pair of long convex portions 12e, and each convex portion presses against the back portion 14m of the first slider 14 depending on the opening and closing angle when the document pressure plate 3 is opened and closed. The two long convex portions 12e and the short convex portion 12k press against the three recesses 14l on the back portion 14m of the first slider 14, generating friction. The friction mechanism prevents the document pressure plate from rapidly dropping when closed or rapidly opening when opened. [Industrial applicability]

[0035] The opening and closing support device of the present invention is provided with an oil stain prevention plate on the side of the first slider that can simultaneously cover the pressure-receiving cam side and the elastic member side, thereby preventing exposure of the elastic member (coil spring) and the pressure-receiving cam side regardless of whether it is open or closed, and preventing oil or grease from the elastic member (coil spring) and the pressure-receiving cam side from falling onto the document underneath. Furthermore, a part of the oil stain prevention plate is provided with cover portions on both sides that cover both sides of the second slider, thereby preventing oil from leaking from both sides of the oil stain prevention plate.In addition, by having a friction mechanism, the document pressure plate can be prevented from rapidly falling when it is closed or from rapidly opening when it is opened, so it is expected to be useful as an opening and closing support device for office equipment equipped with a contact glass for document scanning. [Explanation of Symbols]

[0036] 1 office equipment 2. Main unit of the device 2a Top side 3. Document pressure plate 3a Lower surface 4. Contact Glasses 5 Control section 7. Height adjustment means 10 Opening and closing support device 10A Opening / Closing Support Device 11 Mounting components 11a Mounting plate (bottom plate) 11b Side plate 11c rear plate 11d Hole 11e Hole 11f Mounting Hole 11g Mounting hole 11h Hole 11i protrusion 11j Hole 11k convex part 12 Support members 12a Back panel (top panel) 12b Side plate 12c holding piece 12d hole 12e long Convex part 12th floor containment space 12g hole 12h hole 12i hole 12j Hole 12k short Convex Department 1 3. Lift Member 13a Back panel (top panel) 13b Side plate 13c Mounting Plate 13d hole 13e Hole 13f hole 14. First slider 14a First spring support 14b First spring housing 14c oil stain prevention plate 14d rib 14e Cover section (ribs) 14f surface 14g back side 14h Tip side part 14i rear end part 14j notch 14k One end side top surface 14L recess 14m back 15. Second slider 15a Second spring support 15b Second spring housing 15c protrusion 15d Opening tip 15e Other end side top surface 16. Elastic components (coil springs) 16a One end side 16b Other end side 17 Damper 21 Hinge shaft 22. Second hinge shaft 31 Operating member 32 Roller members 32a cavity 33 Pressure-receiving shaft 34 Pressure-receiving cam section 36. Second elastic component (coil spring) 40 Mounting screws 46 Female threaded section 47 nut 48 Height adjustment screw 50 Ring-shaped member 51 Ring-shaped member 52 Ring-shaped member 53 Disc member O axis center

Claims

1. In an office machine having a document pressure plate that opens and closes the top surface of the main body of the device, an opening and closing support device connects the main body of the device and the document pressure plate, A mounting plate attached to the main body of the device and a mounting member having side plates that rise from both sides of the mounting plate, A support member is attached to the document pressing plate side, having a back plate and side plates hanging down from both sides of the back plate, and these side plates are rotatably attached to the side plates of the mounting member via hinge shafts, The mounting member has pressure-receiving cam portions mounted forward and downward from the position of the hinge shaft on both side plates, A first slider is provided slidably inside the support member, in contact with the pressure-receiving cam portion, A second slider is provided slidably inside the support member, in contact with the free end side of the support member, It has an elastic member elastically positioned between the first slider and the second slider, An opening and closing support device characterized in that an oil stain prevention plate capable of simultaneously covering the pressure-receiving cam portion side and the elastic member side is provided on the side of the first slider.

2. The opening and closing support device further has a back plate and side plates hanging down from both sides of the back plate on the free end side of the support member, and a lift member in which the side plates are rotatably attached to the side plates on the free end side of the support member via a second hinge shaft, and the second slider is in contact with an operating member provided on the side of the lift member on the second hinge shaft side, as described in claim 1.

3. The opening and closing support device according to claim 1, characterized in that the oil stain prevention plate is further provided with cover portions that cover both sides of the second slider.

4. The opening and closing support device according to claim 1, wherein the back plate of the support member has a friction mechanism, the friction mechanism has a pair of long convex portions for friction spaced at a predetermined interval, and convex portions shorter than the pair of long convex portions located on the tip side between the pair of long convex portions, and each of the convex portions presses against the back of the first slider depending on the opening and closing angle when the document pressure plate is opened and closed.

Images