JP2012234045A - Hinge mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hinge mechanism capable of maintaining strength by integrally forming a second operation body with a lift member.SOLUTION: There is provided a hinge mechanism in which a lift member c is rotatably connected to the other end side of a case body b via a second support shaft 4 to dispose a second operation body 4 on the lift member c and the lift member c transfers a force rotating around the second support shaft 2 to a second slider 6 via the second operation body 4 to move the second slider 6 against a spring force of a coil spring 7. The lift member c has both side pieces c2 formed by folding an upper plate c1 and both sides thereof and a support piece 4a formed by folding an extended end of the upper plate c1, and is configured so that an arcuate surface is formed on at least one of an operation part 4b of the second operation body disposed on the support piece 4a and a contact surface of the second slider in contact with the operation part 4b and that an insertion protrusion formed on the support piece is inserted into a receiving hole 15 disposed on the both side pieces c2 of the lift member c to stop an action force when a force acts on the operation part 4b by the receiving hole 15.

Description

  The present invention relates to a hinge mechanism for connecting a reading device such as a copying machine and a lid.

As this type of hinge mechanism, one described in Patent Document 1 has been conventionally known.
This conventional hinge mechanism is used for, for example, a copying machine. A coil spring is provided between the first and second sliders, and a first operation provided on the support member when the support member and the case main body are relatively rotated. The first slider is moved against the spring force of the coil spring by the body to generate a torque in a direction in which the lid of the copier is pushed up with respect to the case body.

  Further, the case body is provided with a lift member, and when the lift member is rotated with respect to the case body, the second slider is opposed to the spring force of the coil spring by the second operating body provided on the lift member. It is made to move, and the torque of the direction which pushes up the cover of a copier with respect to the said lift member is generated.

The second operating body configured as described above is formed by bending the extended base end of the upper plate of the lift member to form a support piece and curling the tip of the support piece. And in order to maintain the intensity | strength of the said support piece, the front-end | tip of the both-sides piece of a lift member was bent, and the bent part was made to apply to the said support piece.
The merit of the hinge mechanism thus configured is that the second operating body can be formed integrally with the lift member.

Japanese Patent No. 3406558

In the conventional hinge mechanism as described above, the support piece constituting the second operating body is provided with a bent portion formed by bending the ends of both side pieces constituting the lift member, thereby reinforcing the support piece. However, in this case, since the tip of the bent portion is a free end, there is a problem that the strength cannot be maintained when a large load is applied to the second operating body.
The objective of this invention is providing the hinge mechanism which can maintain a sufficient intensity | strength while being able to form a 2nd operation body integrally with a lift member.

  In the present invention, a first and second sliders are movably disposed opposite to each other between a case body and a pair of guide surfaces provided on both sides of the case body, and a coil spring is interposed between the first and second sliders. The case main body is rotatably provided on a first support shaft provided on a support member fixed to the reading device side. A second support shaft is provided between the guide surfaces of the case body on the side opposite to the first support shaft, and a lift member is rotatably connected to the second support shaft. A holding plate that holds the object to be read is fixed, and the support member and the lift member are rotatable in the opposite directions with respect to the case body.

  The support member is provided with a first actuating body, and a force by which the support member rotates about the first support shaft is transmitted to the first slider via the first actuating body of the support member. The first slider is moved against the spring force of the coil spring, the lift member is provided with a second operating body, and the force by which the lift member rotates about the second support shaft is applied to the lift member. The second slider is transmitted to the second slider via the two actuating bodies, and the second slider is moved against the spring force of the coil spring.

Further, the lift member includes an upper plate and both side pieces formed by bending both sides of the upper plate, and also forms a support piece by bending the extended base end of the upper plate. The operation part which comprises 2 operation bodies is provided, and the arc surface is formed in at least any one of this operation part and the contact surface of the 2nd slider which contacts this operation part.
On the other hand, both sides of the lift member are provided with a receiving hole for receiving the acting force when a force is applied to the operating portion, and the insertion piece is formed at a position corresponding to the receiving hole in the support piece, The insertion convex portion is received and inserted into the receiving hole.

  In the second invention, the insertion convex portion is provided in the vicinity of the operating portion, and the receiving hole is made to correspond to the vicinity of the operating portion.

  In a third aspect of the invention, a reinforcing member is provided between the both side piece portions between the extended base end of the upper plate and the operating portion, and the deformation of the support piece is suppressed by the reinforcing member.

  In a fourth aspect of the invention, the reinforcing member is constituted by the second support shaft.

According to the first invention, the both side pieces of the lift member are provided with receiving holes for receiving the acting force when a force is applied to the operating portion, and the support pieces are located at positions corresponding to the receiving holes. Since the insertion convex part was formed and this insertion convex part was received and inserted into the receiving hole, the tip of both side pieces of the lift member was bent, and the bent part was compared to the conventional one that was applied to the support piece. The strength can be maintained sufficiently.
In addition, since the arc surface is formed on at least one of the operating portion and the contact surface of the second slider that is in contact with the operating portion, the contact point between the relatively moving operating portion and the contact surface of the second slider is always constant. Can be kept in.

According to the second aspect of the invention, the insertion convex portion is provided in the vicinity of the operating portion, and the receiving hole is made to correspond to the vicinity of the operating portion, so that the strength of the operating portion to which the most force acts can be maintained. .
According to the third and fourth aspects of the invention, since the reinforcing member that suppresses the support piece is provided, the support piece does not bend even if a force acts on the operating portion provided on the support piece.

It is sectional drawing of the state which maintained the angle of a support member and a case main body at 60 degree | times. It is a front view of the state which maintained the angle of a support member and a case main body at 60 degree | times. It is sectional drawing of the state which maintained the angle of a supporting member and a case main body at 90 degree | times. It is a front view of the state which maintained the angle of a support member and a case main body at 90 degree | times. It is a perspective view of a supporting member. It is the fragmentary sectional view which expanded the attachment state of the operation body provided in the support member. It is a perspective view of a 1st slider. It is the perspective view which looked at the whole from back. It is a side view of the state which opened the case main body and the lift member. It is sectional drawing of the state which opened the case main body and lift member of 1st Embodiment. It is a perspective view of a lift member. It is a partial expansion perspective view of the operation part of the 2nd operation body.

  The illustrated embodiment is a hinge mechanism used in a copying machine, and this hinge mechanism is rotatable with respect to the support member a through a first support shaft 1 and a support member a fixed to the reading device X side of the copy machine. The case body b includes a supported case body b and the case body b via a second support shaft 2 and a lift member c that is rotatably supported.

As shown in FIG. 5, the support member a is provided with both side upright pieces a2 and a2 on both sides of the flat plate portion a1 fixed to the reading device X side of the copier, and the back side between the side upright pieces a2 and a2. An upright piece a3 is provided.
A bolt hole a4 for fixing the support member a to the reading device X is formed in the flat plate portion a1, and shaft holes a5 and a5 are formed in the both side pieces a2 and a2. The shaft hole The first support shaft 1 is supported by a5 and a5.

  In addition, a pair of shaft members 3 and 3 as a first operating body are provided slightly forward and lower than the shaft holes a5 and a5. Yes. As is clear from FIG. 6, flange portions are formed at the base ends of the shaft members 3, 3, and the distal ends of the shaft members 3, 3 are spaced from each other as is clear from FIG. 5. They are facing each other.

  Furthermore, the first support shaft 1 supported between the shaft holes a5 and a5 supports the case body b so as to be rotatable. The case body b has both side pieces b2 and b2 on both sides of the upper plate b1. While being formed, the first support shaft 1 penetrates the both side pieces b2 and b2 and is supported by the shaft holes a5 and a5.

  Further, the second support shaft 2 is stretched over the side pieces b2 and b2 opposite to the side supported by the first support shaft 1, and as shown in FIG. Both ends of the shaft 2 protrude from both side pieces b2 and b2, and a lift member c is rotatably connected to the protruding ends. That is, the lift member c is shaped to cover the case body b, and both side pieces c2 suspended from both sides of the upper plate c1 are placed along the outside of the both side pieces b2 of the case body b, and the second side pieces c2 The lift member c is rotatably supported by penetrating the tip of the support shaft 2.

The case body b and the lift member c rotate in opposite directions around the first and second support shafts 1 and 2.
Reference numerals c3 and c3 are attachment pieces provided on the lower side of the both side pieces c2 and c2, and are fixed to the pressing plate Y which is a lid of the copying machine. That is, the both side pieces c2 and c2 are embedded in the pressing plate Y (hereinafter referred to as “lid Y”) to fix the mounting pieces c3 and c3 to the lid Y.

  As described above, the second operating body 4 is provided between the both side pieces c2 and c2 of the lift member c rotatably supported by the second support shaft 2. That is, an arcuate operating portion 4b is formed at the tip of a support piece 4a formed by vertically bending an extended portion from the rear end of the upper plate c1 of the lift member c, and this operating portion 4b is used as the second operating body of the present invention. It is said.

Further, a flat plate portion 4c is formed in the tangential direction of the arc of the operating portion 4b, and insertion convex portions 4d shown in FIG. 12 are formed on both sides of the flat plate portion 4c.
In FIG. 12, reference numeral 4e denotes a rib portion, and a reinforcing effect is exhibited by projecting a part of the support plate 4a.

Further, a receiving hole 15 is formed at a position corresponding to the insertion protrusion 4d on both side pieces b2 and b2 of the case body b, and the insertion protrusion 4d is inserted into the reception hole 15.
Further, the support piece 4a is brought into contact with the second support shaft 2, and the second support shaft 2 serves as a support for the support piece 4a to prevent the support piece 4a from being bent. That is, the second support shaft 2 also functions as a reinforcing member with respect to the support piece 4a. However, it is natural that a reinforcing member may be provided separately from the second support shaft 2.

On the other hand, the first and second sliders 5 and 6 are slidably incorporated between the guide surfaces which are the inner facing surfaces of the both side pieces b2 and b2 of the case body b. A coil spring 7 that exerts a spring force during compression is interposed between the six.
The first slider 5 is pressed against the first support shaft 1 by the action of the spring force of the coil spring 7, and the second slider 6 is pressed against the operating portion 4b as the second operating body. , 2 sliders 5, 6 are incorporated between the first support shaft 1 and the operating portion 4 b which is the second operating body.
In the state where the operating portion 4 b is in contact with the second slider 6 as described above, a predetermined gap is formed between the support piece 4 a and the second slider 6. This gap is necessary for smoothly rotating the support piece 4a and the operating portion 4b.

As shown in FIG. 7, the first slider 5 is integrally formed with a pinching prevention member 8 formed of a convex portion formed on the front surface thereof, but the pinching prevention member 8 is formed on both sides of the pinching prevention member 8. The cam surfaces 9 and 9 are formed at right angles to 8.
In addition, the shaft members 3 and 3 as the first operating body perform an arc motion around the first support shaft 1 in the process in which the case main body b rotates with respect to the support member a, and 0 degrees to 60 degrees. The cam surfaces 9 and 9 are pushed in the process of rotating in the range of degrees, the first slider 5 is pushed while bending the coil spring 7, and the first slider 5 is separated from the first support shaft 1.

In addition, when the angle between the support member a and the case body b is in the range of the set angle or less, for example, in the range of 60 degrees or less in this embodiment, the shaft members 3, 3 are configured to contact the cam surfaces 9, 9, In the range of 60 degrees or more and 90 degrees, the shaft members 3 and 3 as the first operating body are configured to be kept away from the cam surfaces 9 and 9.
When the case main body b is kept at a position of 90 degrees with respect to the support member a, the rear end of the upper plate b1 of the case main body b hits the back side standing piece a3 of the support member a and does not rotate more than 90 degrees. (See FIG. 3).

Further, as described above, the first slider 5 moves against the coil spring 7 to bend the coil spring 7, and the spring force of the coil spring 7 at that time pushes up the lid Y, that is, the lid Y. Acts as a torque in the direction of opening. Therefore, for example, in a copying machine, when the lid Y is opened from the closed state, the spring force of the coil spring 7 becomes an assist force with respect to the force for opening the lid Y.
On the other hand, when the lid Y in the opened state is closed, the spring force of the coil spring 7 acts as a damping force for preventing the lid Y from dropping suddenly.

  On the other hand, in a state where the shaft members 3, 3 as the first operating body are pressed against the cam surfaces 9, the pinching prevention member 8 is configured to protrude between the opposed portions of the shaft members 3, 3. The length of the pinching prevention member 8 in the rotation direction of the case body b and the support member a is the first slider with which the shaft members 3 and 3 are in contact with each other in the process of rotation of the case body b and the support member a. 5 is approximately equal to or longer than the contact range of 5. Therefore, the pinching prevention member 8 is necessarily positioned between the shaft members 3 and 3 in a situation where the relative positions of the shaft members 3 and 3 and the first slider 5 change.

Since the pinching prevention member 8 provided on the first slider 5 protrudes between the shaft members 3 and 3 as the first operating body in this way, for example, a copy document as a reading object is connected to the shaft members 3 and 3. Even if it tries to enter between the first slider 5, the pinching prevention member 8 cannot get in because it gets in the way. The same is true for human fingers.
In the first embodiment, the contact portion of the present invention refers to an axial contact portion where the shaft members 3 and 3 and the first slider 5 are in contact with each other, and a non-contact portion is the opposite of the shaft members 3 and 3. Point between clubs.

The lift member c rotatably supported by the second support shaft 2 is for rotating in the opposite direction to the case body b when copying a predetermined page of a thick book, for example.
That is, in order to copy a thick book, when the book is placed on the reading device X and rotated in the direction in which the lid Y is closed in this state, the case main body b and the lift member c are moved until the lid Y hits the book. Are integrally rotated around the first support shaft 1.

  When the lid Y hits the book, the case body b stops its rotation and stops at that position. If the lid Y is further rotated with the case body b stopped in this way, this time, Only the lift member c rotates about the second support shaft 2, and as shown in FIG. 9, the support member a and the lift member c are parallel to each other while maintaining an interval corresponding to the thickness of the book.

Next, the bending state of the coil spring 7 when the case main body b and the lift member c are rotated in opposite directions will be described in detail.
When the case body b and the lift member c are integrally rotated about the first support shaft 1, the shaft members 3 and 3 as the first operating body push the first slider 5, but at this time The second slider 6 hits the operating portion 4b of the second operating body 4 and is prevented from moving. Therefore, if the first slider 5 is pushed by the shaft members 3 and 3 as the first operating body, only the first slider 5 is moved and the coil spring 7 is bent.

Further, when the lift member c rotates, the first slider 5 is moved before that and the coil spring 7 is bent.
Then, when the lift member c rotates around the second support shaft 2 in a state where the rotation of the case main body b is stopped, that is, in a state where the coil spring 7 is bent, the operating portion 4b which is the second operating body 4 However, while making circular motion centering on the 2nd support shaft 2, the 2nd slider 6 is pushed in the process, and the coil spring 7 is further bent.

Therefore, when the lift member c rotates, the amount of deflection of the coil spring 7 becomes larger than when the case body b and the lift member c rotate together.
Since the operating portion 4b is formed in an arc shape and the contact portion with the second slider 6 is an arc surface, the contact point between the relatively moving operating portion 4b and the contact surface of the second slider 6 can always be kept constant. it can. However, the said arc surface should just be formed in at least any one of the operation part 4b and the contact surface of the 2nd slider 6 made to contact this operation part 4b.

On the other hand, the first slider 5 is provided with a spring receiver 10, and the tip of an adjustment bolt 11 is rotatably fitted to the spring receiver 10. The adjustment bolt 11 thus configured is protruded outward of the pinching prevention member 8 through the screw hole 12 formed in the first slider 5 and the pinching prevention member 8.
When the adjusting bolt 11 is rotated with respect to the screw hole 12, the adjusting bolt 11 moves in the axial direction with respect to the screw hole 12, and the spring receiver 10 is moved to bend the coil spring 7. Can be adjusted.

  FIG. 1 shows a state in which the opening degree of the case body b and the lift member c with respect to the support member a, that is, the opening degree of the lid Y is maintained at approximately 60 degrees. In FIG. 3, the opening degree of the case main body b and the lift member c relative to the support member a, that is, the opening degree of the lid Y is maintained at approximately 90 degrees.

  When the lid Y is at a position of 60 degrees, the first, second sliders 5 and 6 hold the initial position, the coil spring 7 maintains the maximum extension state, and the spring force is minimized. In the range of 60 degrees to 90 degrees, the shaft members 3, 3 as the first operating body are separated from the cam surfaces 9, 9 of the first slider 5. Therefore, in this state, that is, in the range of 60 degrees to 90 degrees, the torque to open the lid Y by the spring force of the coil spring 7 becomes zero, and in the range of 60 degrees to 90 degrees, the lid Y is It is in the free rotation range where the spring force does not act.

  Note that the range of 60 degrees to 90 degrees where the spring force of the coil spring 7 does not act is hardly used during the operation of copying a document. However, it is necessary to open the lid Y largely at the time of repairing the copy machine, and in this case, the lid Y may be opened up to 90 degrees.

When the lid Y is rotated in the closing direction from the state shown in FIG. 1 where the opening degree of the lid Y is maintained at 60 degrees, the shaft member 3, which is the first operating body, can be expressed in a relative manner. 3 pushes the first slider 5 and moves the first slider 5 against the coil spring 7. At this time, since the second slider 6 is pressed against the operating portion 4b of the second operating body 4 and does not move any further, if the first slider 5 moves as described above, the coil spring 7 is bent and the spring force is increased. Demonstrate.
In addition, when the first slider 5 moves against the coil spring 7, the first support shaft 1 and the shaft members 3, 3 as the first operating body exert torque on the first slider 5. The arm length gradually decreases.

Therefore, the torque in the direction of opening the lid Y changes in the relative relationship between the spring force of the coil spring 7 and the length of the arm that exerts the above torque. The torque is set to be minimum at 60 degrees and increase as the lid Y is closed, and the torque is maximized when the opening degree is around 10 to 15 degrees.
The torque acts as a damping force for preventing the lid Y from being closed suddenly by its own weight.

When the opening is smaller than 10 to 15 degrees, the amount of deflection of the coil spring 7 is increased. However, as described above, the length of the arm that exerts torque is shortened and the weight of the lid Y is determined. When the moment in the closing direction acts as a whole, the force in the direction of opening the lid Y suddenly weakens, and when the opening is zero, which is the state in which the lid Y is completely closed, the amount of deflection of the coil spring 7 is maximized. However, the arm length between the support shaft 1 and the shaft members 3 and 3 for applying torque to the first slider 5 is minimized, and the torque for opening the lid Y is minimized.
In this way, when the torque for opening the lid is minimum, the lid Y is kept closed and the document is pressed by the weight of the lid Y.

  In any case, since the pinching prevention member 8 integrated with the first slider 5 is positioned between the shaft members 3 and 3 as the first operating body in the process of opening and closing the lid Y, this pinching prevention member 8, even if an original tries to enter between the shaft members 3, 3 and the first slider 5, the pinching prevention member 8 obstructs the entry. As described above, since the document is prevented from entering by the pinching prevention member 8, even if grease is applied to a portion where the shaft members 3, 3 and the cam surfaces 9, 9 are in contact with each other, the document is soiled by the grease. It can also prevent the fingers from being caught.

According to the embodiment as described above, the insertion convex portion 4d is formed on the flat plate portion 4c at the position corresponding to the operating portion 4b of the second operating body 4, and both ends of the operating portion 4b are integrally supported. As compared with the conventional case where reinforcement is performed with a bent portion having a free end, the strength is increased.
Further, since the second support shaft 2 also functions as a reinforcing member, the strength of the second operating body is further increased.

  It is optimal as a hinge mechanism that connects the reading device of the copier and the lid.

a Support member b Case body b1 Upper plate X Reading device Y Holding plate (lid)
DESCRIPTION OF SYMBOLS 1 1st support shaft 2 2nd support shaft 3 Shaft member which is a 1st operation body 4a Support piece 4b Operation part as 2nd operation body 4d Insertion convex part 5 1st slider 6 2nd slider 7 Coil spring 15 Receiving hole

Claims (4)

A first and second sliders are movably disposed opposite to each other between a case main body and a pair of guide surfaces provided on both sides of the case main body, and a coil spring is interposed between the first and second sliders. A case main body is rotatably provided on a first support shaft provided on a support member fixed to the side, and a second support shaft is provided between the guide surfaces of the case main body on the side opposite to the first support shaft. The lift member is pivotably connected to the second support shaft, and a pressing plate for holding the object to be read is fixed to the lift member, and the support member and the lift member are opposite to the case body. The support member is provided with a first actuating body, and the force by which the support member rotates about the first support shaft is applied to the support member via the first actuating body of the support member. To the slider, The first slider is moved against the spring force of the coil spring, the second member is provided on the lift member, and the force by which the lift member rotates about the second support shaft is applied to the lift member. A hinge mechanism that transmits the second slider to the second slider via a second operating body and moves the second slider against the spring force of the coil spring;
The lift member includes an upper plate and both side pieces formed by bending both sides of the upper plate, and forms a support piece by bending an extended base end of the upper plate, and the second operation is performed on the support piece. An actuating part constituting the body is provided, and an arc surface is formed on at least one of the actuating part and the contact surface of the second slider that comes into contact with the actuating part. A receiving hole for receiving the acting force when a force is applied to the portion is provided, and an insertion convex portion is formed at a position corresponding to the receiving hole in the support piece, and the insertion convex portion is inserted into the receiving hole. Hinge mechanism.   The hinge mechanism according to claim 1, wherein the insertion convex portion is provided in the vicinity of the operating portion, and the receiving hole corresponds to the vicinity of the operating portion.   The hinge mechanism according to claim 1 or 2, wherein a reinforcing member is bridged between the side piece portions between the extended base end of the upper plate and the operating portion, and deformation of the support piece is suppressed by the reinforcing member.   The hinge mechanism according to claim 3, wherein the reinforcing member is constituted by the second support shaft.

Images