JP2002370761A - Cover-turning-supporting system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To smoothly turn a cover, and stably keep the cover at an inversion location and a standing location by this cover-turning-supporting system. SOLUTION: This system supports the cover 23 in such a manner that the cover 23 may turn between the inversion location and the standing location with a horizontal axis as the center. Such a system is equipped with the pivotal axis 36 which is horizontally arranged, a hinge cam 35, a loading roller 39, a roller shaft 40, a spring 41, and a hinge holder 31. In this case, for the hinge can 35, a cam surface 38, which is attached to the cover, and at the same time, through which the pivotal shaft is passed, and which is drawn with the pivotal shaft as the center, is formed. The loading roller 39 is horizontally arranged under the hinge cam. The roller shaft 40 supports the loading roller. The spring 41 is bridged between the pivotal shaft and the roller shaft, and applies the spring force to the loading roller for coming into contact with the cam surface of the hinge cam. The hinge holder 31 has a pivotal shaft supporting section 35 which detachably supports the pivotal shaft at the horizontal location, and a roller supporting section 32 which vertically movably supports the loading roller.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover rotation supporting device which can rotate a cover between a lying position and a standing position about a horizontal axis and holds the cover in the lying position and the standing position.

[0002]

2. Description of the Related Art A copying machine is provided with a document reading section for reading information described in a document placed horizontally on an upper surface of a copying machine body provided with a copying mechanism. Is provided with a cover that rotates in the vertical direction to open and close the document reading unit. That is, this cover
With the horizontal axis as the center, the document is laid up and down substantially horizontally with the lying position (closed position) where the document placed on the document reading section is pressed down horizontally and separated from the document reading section to take out and load the document. The copying machine main body is provided so as to rotate between an upright position (opening position) where the copying operation can be performed. The copier body and the cover support the cover in a rotatable manner and hold the cover in the lying position and the upright position, respectively, so that the cover can be opened and closed in the lying position to prevent the cover from rising and falling in the upright position. A support device is provided.

Conventionally, a configuration shown in FIG. 6 has been adopted as the cover opening / closing support device. That is, in FIG. 6, reference numeral 1 denotes a copying machine main body, and 2 denotes a cover. The copier main body 1 is provided with a hinge holder 11 having an upper end open and a closed lower end, for example, a vertical cylindrical body and having an arm 11a rising upward. The hinge holder 11 has an upper end closed and a lower end open. The load member 12 formed of a vertical cylindrical body is inserted so as to be able to move up and down, and is positioned inside the load member 12 and supported by the lower end of the hinge holder 11 to apply an upward spring force to the load member 12. A compression coil spring 13 is provided. A horizontal pivot 14 is attached to the arm portion 11a of the hinge holder 11, and the cover 2 serving as a lower edge portion at the upright position is attached to the pivot 14.
Are rotatably supported. An edge of the cover 2 is provided with a hinge cam 15 having a cam surface 15a having a continuous arc drawn around the pivot 14.
The upper end of the load member 12 pushed up by the compression coil spring 13 is pressed against the cam surface 15a from below. The cam surface 15a of the hinge cam 15 has a large distance between a portion contacting the load member 12 when the cover 2 is in the lying position (indicated by a virtual line) A and (the center axis of) the pivot 2. The distance between the portion that comes into contact with the load member 12 and the pivot 14 (the center axis thereof) when in the upright position (indicated by a solid line) B is set to be small. That is, the load member 12 applies a load to the cover 2 via the hinge cam 15 when the cover 2 is stopped and when it is turned, thereby suppressing movement.

[0004] Then, the cover 2 rotates about a pivot 14 between a lying position A and a standing position B. The hinge cam 15 rotates about the pivot 14 integrally with the cover 2 while constantly contacting the upper end of the load member 12 pushed up by the compression coil spring 13. When the cover 2 is in the lying position A, the hinge cam 15 pushes down the load member 12 most and compresses the compression coil spring 13, so that the load member 12 is pressed against the hinge cam 15 by a strong reaction force of the compression coil spring 13. The cover 2 is held at the lying position A so that the cover 2 does not float unnecessarily. Further, when the cover 2 is in the upright position B, the cam surface 15a of the hinge cam 15 contacts the load member 12 which has risen in an arc having a small radius, and holds the cover 2 in the upright position B so that the cover 2 does not fall down unnecessarily. .

[0005]

However, in such a cover rotation supporting device, the hinge cam 15 which is a component provided on the cover 2 rotates about the pivot 14 when the cover 2 rotates. The load member 12, which is a component provided on the copying machine main body 1, has an upper end surface that comes into contact with the cam surface 15a of the hinge cam 15 and does not always change at a fixed position. That is, since the upper end of the load member 12 makes sliding contact (sliding contact) with the hinge cam 15, the frictional resistance of the load member 12 to the hinge cam 15 is large. Therefore, the resistance in rotating the hinge cam 15, that is, the resistance in rotating the cover is large, and it is difficult to smoothly rotate the cover.

Further, only a specific portion at the upper end of the load member 12 is in sliding contact with the hinge cam 15 and the wear proceeds rapidly. For this reason, there is also a problem that the contact state of the cam surface 15a of the hinge cam 15 with the load member 12 changes, and the rotation state of the cover 2 changes.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cover rotation support device that can smoothly rotate a cover and stably hold the cover.

[0008]

According to the present invention, there is provided a cover rotation supporting device for supporting a cover so as to rotate between a lying position and a standing position about a horizontal axis.
A hinge cam that is horizontally arranged, a hinge cam that is attached to the cover, has the cam inserted through the pivot, and has a cam surface drawn about the pivot, a load roller horizontally arranged below the hinge cam, and A roller shaft for supporting the load roller, an elastic member stretched over the pivot shaft and the roller shaft, and an elastic member for applying an elastic force to the load roller to make contact with a cam surface of the hinge cam; And a hinge holder having a roller support for detachably supporting the load roller and a roller support for supporting the load roller so as to be able to move up and down.

According to the structure of the present invention, when the hinge cam rotates together with the cover, the load roller that contacts the cam surface of the hinge cam rotates, that is, makes a rolling contact, so that the cover can rotate smoothly. Further, the load roller has a simple configuration and always stably contacts the cam surface of the hinge cam.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS.

In this embodiment, a cover rotating support device of the present invention is provided with a cover (document cover) for a document press provided in a document reading section provided on an upper surface of a copying machine main body in a copying machine. This is applied for rotatably supporting. 1 is a perspective view showing the copier in a state where the cover is folded down (closed), and FIG. 2 is a perspective view showing a state in which the cover is raised (opened).

In FIG. 1 and FIG. 2, reference numeral 21 denotes a copying machine main body, and an original reading section 22 is provided at the upper part of the copying machine main body 21 for horizontally mounting an original and reading information described on the original. The document reading section 22 is provided with a cover 23 that rotates in the vertical direction and opens and closes the document. The cover 23 is formed in a rectangular shape having a size capable of covering the entire original reading section 22 from above, and has an edge (a rear side) of the copying machine main body 21 at a position where the original reading section 22 is covered from above. The left and right ends in the width direction at the lower side at the standing position B) are supported by the cover rotation support device 30 of the present invention, and are provided on the copying machine main body 21.

That is, the cover rotation support device 30 lowers the cover 23 horizontally about a horizontal axis and presses down the original placed on the original reading section 22 from above. It stands up substantially vertically, separates from the document reading section 22, supports the document to be picked up and placed, and pivots between an upright position (opening position) B where the work can be taken out and placed. The cover 23 is held at the position A and the standing position B, respectively, to prevent the cover 23 from rising at the lying position A and falling at the standing position B.

The cover rotation support device 31 will be described with reference to FIGS. FIG. 3 is a perspective view showing the cover rotation support device 31 when the cover 23 is at the standing position B,
FIG. 4 is a cross-sectional view showing the cover rotation support device 31 when the cover 23 is at the lying position A, and FIG. 5 is a cross-sectional view showing the cover rotation support device 31 when the cover 23 is at the upright position B. The cover rotation support device 30 has the same configuration and is provided corresponding to both left and right ends of the cover 23 to support both ends of the cover 23.
A hinge holder 31 is provided at the rear of the upper surface of the copying machine main body 21 in which the components are provided over both of them. The hinge holder 31 has a roller support portion 32 and a pair of hinge arms 33. The roller support 32 is provided in the copying machine main body 21.
(Document reading section 22) is formed as a concave portion which is provided to enter from the upper surface, and has a rectangular parallelepiped shape in which an upper end surface is opened and a lower end surface of a predetermined depth is closed, and a pair of hinge arms is provided. Reference numerals 33 are located on both sides in the width direction of the roller support portion 32 and project upward from the upper surface of the copying machine main body 21 (document reading portion 22), and pivot support portions 34 are formed at the same height. These pivot support portions 34 horizontally support pivots 37 of the cover 23, which will be described later, and are open to the front of the copier body 21 (document reading section 22) so that the pivots 37 can be attached and detached.

A hinge cam 35 is provided on the rear edge (lower side) of the cover 23 at a position facing the hinge holder 31 at the rear edge of the cover 23 (the lower edge at the standing position B).
The hinge cam 35 has a horizontal pivot 36 inserted therethrough. The pivot 36 is provided rotatably with respect to the hinge cam 35, and both ends protrude outward from the hinge cam 35. The pivot 36 is connected to the hinge holder 31 provided on the copying machine main body 21.
The pivot support portion 3 is horizontally disposed over the pair of hinge arms 33 and has both ends formed on the pair of hinge arms 33, respectively.
4 and is detachably inserted and supported. Thereby, the cover 23 is provided on the copying machine main body 21 via the pivot shaft 36 and the hinge cam 35 so as to be rotatable in the up-down direction. It is configured to rotate between a standing position (open position) B that stands vertically and separates from the document reading unit 22.

A pivot 3 is provided on the outer peripheral surface of the hinge cam 35.
A cam surface 38 in which arcs drawn around the center 6 are continuous is formed. The cam surface 38 has an arcuate cam surface portion 38a facing the roller support portion 32 of the hinge holder 31 when the cover 23 is in the lying position A, and the roller support portion 32 of the hinge holder 31 when the cover 23 is in the upright position B.
Arc-shaped cam surface portions 38b facing the
a and a boundary point 38c where the cam surface portion 38a intersects. The radius of the cam surface 38 a from the pivot 36 is the cam surface 3.
8b, the cam surface 38b is
Is smaller than the radius of the cam surface 38a, and the boundary point 38c is defined by the cam surfaces 38a and 38b having different radii.
And the corners where they intersect.

A load roller 39 is disposed below the cam surface 38 of the hinge cam 35. The load roller 39 forms a cylindrical body having a width direction length that is the same as the width direction of the cam surface 38 of the hinge cam 35 and a diameter slightly smaller than the thickness of the cam surface 38 in the front-rear direction. A roller shaft 40 is rotatably inserted through the load roller 39 on the center axis thereof.
9 protrudes outward from both ends.

The load roller 39 is arranged below the cam surface 38 of the hinge cam 35 in parallel with the pivot 36.
A hinge holder 31 provided in the copying machine main body 21 is inserted into a roller support portion 32 so as to be vertically movable from an upper end opening thereof. Both ends of the pivot 36 provided on the hinge cam 35 and both ends of the roller shaft 40 provided on the load roller 39 opposed to both ends of the pivot 36 are:
A tension coil spring 41 is stretched as an example of each elastic member. As a result, the load roller 39 is constantly pulled by the tension coil spring 41 toward the cam surface 38 of the hinge cam 35, and the outer peripheral surface thereof is in pressure contact with the cam surface 38.
In this manner, the load roller 39 and the cam surface 38 of the hinge cam 35 are assembled in a state where they are in contact with each other. That is, the load roller 39 serving as a load member applies a load to the cover 23 via the hinge cam 35 when the cover 23 stops and rotates, thereby suppressing movement.

The operation of the thus-assembled cover rotation support device will be described. Cover 23 is copier body 2
1 supported on a hinge holder 31 provided in
And pivots vertically between the lying position A and the standing position B. The hinge cam 35 is pivotally integrated with the cover 2.
Around the same direction. In this case, the outer peripheral surface of the load roller 39 pulled up by the tension coil spring 41 always contacts the cam surface 38 of the hinge cam 35.

As shown in FIG. 4, the cover 23 is in the lying position A.
The cam surface 38 of the cam surface 38 of the hinge cam 35
a is rotated so as to be located at the lower portion, and contacts the outer peripheral surface of the load roller 39. Since the cam surface 38a has a large radius from the pivot 36, the cam surface 38 pushes down the load roller 39 most against the spring force of the tension coil spring 41 to pull the tension coil spring 13. Thereby, the tension coil spring 41
The load roller 39 comes into pressure contact with the cam surface 38 due to the reaction force of. In this way, the hinge cam 35 comes into contact with the load roller 39 at the portion of the cam surface 38a having a large radius, so that the cam surface 38 holds the cover 2 at the lying position A in the form of an effective cam surface and floats up. It is kept so that there is no. The boundary point 38c of the cam surface 38 is located on the rear side with respect to the contact point between the cam surface 38a and the load roller 39. To rotate the cover 23 upward, the tension coil spring 41 is used.
It is necessary that this boundary point 38c surpasses the point of contact with the outer peripheral surface of the load roller 39 against the spring force of
When the cover 23 is turned upward from the falling position A, the cover 23 does not rotate upwards unnecessarily. 23 and the hinge cam 3
The boundary point 38c causes the cam surface 38 of No. 5 to exceed the outer peripheral surface of the load roller 39. When the hinge cam 35 rotates integrally with the rotation of the cover 23, the load roller 39 that contacts the cam surface 38 is also supported by the roller shaft 40 by friction and rotates. For this reason, the rolling contact of the load roller 39 causes the hinge cam 35 to rotate smoothly and lightly without a large resistance by the load member, and the cover 23 to also rotate smoothly. When the load roller 39 applies a load to the cover 23 via the hinge cam 35, the cover 23 is not rotated suddenly and is safe.

As shown in FIG. 5, the cover 23 is in the upright position B.
The cam surface 38 of the cam surface 38 of the hinge cam 35
b rotates so as to be located at the lower portion and comes into contact with the outer peripheral surface of the load roller 39. Since the cam surface 38b has a small radius from the pivot 36, the load roller 39 is pulled by the tension coil spring 41 and moves up inside the roller support portion 32 of the hinge holder 31 to contact the cam surface 38b. As a result, the cover 2 is held at the upright position B so that it does not float unnecessarily. In this way, the hinge cam 35 comes into contact with the load roller 39 at the portion of the cam surface 38 having a small radius, so that the cam surface 38 holds the cover 2 in the upright position B in the form of an effective cam surface and does not fall over unnecessarily. I'm holding it down. The boundary point 58c of the cam surface 38 is located on the front side with respect to the contact point between the cam surface 38a and the load roller 39. To rotate the cover 23 downward, the tension coil spring 41 is used.
It is necessary that the boundary point 38c surpasses the contact point with the outer peripheral surface of the load roller 39 against the spring force of the load roller 39, and the downward force exceeding the spring force of the tension coil spring 41 is applied to the cover 23.
When the cover 23 is turned downward from the standing position B, a downward force exceeding the spring force of the tension coil spring 41 is applied to the cover 23. In addition to the hinge cam 35
The boundary point 38c of the cam surface 38 is moved beyond the outer peripheral surface of the load roller 39. When the hinge cam 35 rotates integrally with the rotation of the cover 23, the load roller 39 that contacts the cam surface 38 is also supported by the roller shaft 40 by friction and rotates. For this reason, the rolling contact of the load roller 39 causes the hinge cam 35 to rotate smoothly and lightly without large resistance by the load member, and the cover 23 to rotate smoothly. When the load roller 39 applies a load to the cover 23 via the hinge cam 35, the cover 2 is not rotated suddenly and is safe.

When the hinge cam 35 rotates together with the cover 23, the load roller 39 that contacts the cam surface 38 of the hinge cam 35 rotates, that is, makes a rolling contact, so that the cover 23 can rotate smoothly.
The load roller 39 has a simple structure and always comes into contact with the cam surface 38 of the hinge cam 35 stably. Thereby, the cover 23 can be smoothly rotated, and can be stably held at the lying position A and the standing position B.

Further, by applying a force by a tension coil spring 41 which is an elastic member that stretches the load roller 39 between the hinge cam 35 and the load roller 39, the cover 23 can be moved between the falling position A and the upright position B while having a simple configuration. The load roller 39 always stably comes into contact with the cam surface 38 of the hinge cam 35 irrespective of when it stops and when it rotates.

Further, since the hinge cam 35 rotates with the rotation of the cover 23 and the load roller 39 that contacts the cam surface 38 of the hinge cam 35 rotates, the portion of the load roller 39 that contacts the cam surface 38 of the hinge cam 35 is removed. It changes with the rotation of the hinge cam 35. For this reason, since the outer peripheral surface of the load roller 39 is worn uniformly along the circumferential direction, the cam surface 38 of the hinge cam 35 keeps the contact state with the load roller 39 constant, and the rotation state of the cover 23 does not fluctuate. is there.

The present invention is not limited to the above-described embodiment, but can be implemented in various modifications.

[0026]

According to the cover rotating support device of the present invention,
Since the load roller is used as a load member that applies a load by contacting the hinge cam provided on the cover, when the hinge cam rotates together with the cover, the load roller rotates and comes into rolling contact with the hinge cam, thereby smoothly rotating the cover. can do.

Further, by applying a force to the load roller by an elastic member stretched between the hinge cam and the hinge cam, the load roller is stably stably provided on the cam surface of the hinge cam regardless of the stop position and the rotation of the cover in a simple structure. Contact.

Furthermore, since the hinge cam rotates with the rotation of the cover and the load roller that contacts the cam surface rotates, the load roller that contacts the cam surface changes with the rotation of the hinge cam, and the load roller rotates. Since the cam surface of the hinge cam is in constant contact with the load roller and the turning state of the cover is constant without fluctuation because the cam surface of the hinge cam is uniformly worn in the direction.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a copying machine.

FIG. 2 is a perspective view showing the copying machine.

FIG. 3 is a perspective view showing a cover rotation support device according to the embodiment of the present invention.

FIG. 4 is a sectional view showing the cover rotation support device according to the embodiment;

FIG. 5 is a sectional view showing the cover rotation support device according to the embodiment;

FIG. 6 is a cross-sectional view showing a cover rotation support device in a conventional form.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 21 ... Copy machine main body 22 ... Original reading part 23 ... Cover 31 ... Hinge holder 32 ... Roller support part 33 ... Hinge arm 34 ... Axis support part 35 ... Hinge cam 36 ... Axis 38 ... Cam surface 39 ... Load roller 40 ... Roller shaft 41 ... Tension coil spring (elastic member)

Claims (1)

[Claims] 1. An apparatus for supporting a cover so as to rotate between a lying position and a standing position about a horizontal axis, wherein a horizontally disposed pivot is attached to the cover and the pivot is inserted. Hinge cam having a cam surface drawn around the pivot, a load roller horizontally disposed below the hinge cam, a roller shaft supporting the load roller, the pivot and the roller shaft. An elastic member that is stretched across and applies an elastic force to contact the load roller with the cam surface of the hinge cam; a pivot support portion that detachably supports the pivot in a horizontal position; and the load roller that can be moved up and down. A hinge holder having a roller support portion for supporting the cover rotation support device.