JP3307680B2 - Hinge device for opening and closing lid - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used for attaching an opening / closing cover such as a paper presser plate of a copying machine or a stereo cover plate to a fixed body such as an apparatus main body. The present invention relates to a hinge device for an opening / closing lid having a so-called free stop function capable of stopping the lid at an arbitrary opening angle.

[0002]

2. Description of the Related Art A hinge device having a free stop function can be easily opened and closed by a manual operation, such as a paper pressing plate for a copying machine or a stereo lid plate, because the opening and closing operation of an opening and closing cover can be easily performed. It is widely used for attaching a cover body, and various structures are conventionally proposed.

FIG. 7 is a perspective view showing the structure of a hinge device of this type which has been conventionally and generally used, as disclosed in, for example, Japanese Utility Model Publication No. 3-2828. , Fixed body mounting member (base holder)
One end of 101 and lid mounting member (open / close lid holder)
102 is pivotally connected to one end of the mounting member 102 via a support shaft 100 so as to be swingable relative to each other.
Rod-shaped spring guide 10 across the other end of
3, a long coil spring 104 and a short coil spring 105 are wound around the outer periphery of the spring guide 103, and a frictional force is applied to the opposing portion between the open / close lid holder 102 and the base holder 101. This is formed by forming a sliding surface 106 for the exercise.

In the hinge device having the above-described structure, when the opening angle of the opening / closing lid holder 102 is large and the moment in the closing direction around the support shaft 100 of the opening / closing lid holder 102 due to the weight of the opening / closing lid is small, the opening / closing of the opening / closing lid holder 102 is small. When the lid holder 102 receives the urging force of the long coil spring 104, the moment in the opening direction due to the urging force of the long coil spring 104, the moment in the closing direction due to the weight of the opening / closing lid, and the sliding of the sliding surface 106. The free stop function is exhibited by balancing with the frictional force. Further, the opening angle of the opening / closing lid holder 102 is small, and the opening / closing lid holder
When the moment in the closing direction about the second support shaft 100 is large, the opening / closing lid holder 102 receives the urging forces of both the long coil spring 104 and the short coil spring 105, and the urging force of both coil springs 104, 105 is applied. A free stop function is exhibited by the balance between the moment in the opening direction, the moment in the closing direction due to the weight of the lid, and the frictional force caused by sliding of the sliding surface 106.

[0005]

In the conventional hinge device having the above-described structure, the spring guide 103, which is an essential component for exhibiting the free stop function, or a guide mechanism instead of the spring guide 103 and the coil spring 104, 105 and the like are hung between the other end of the base holder 101 and the open / close lid holder 102 which are pivotally connected to each other so as to be swingable relative to each other.
There is a limit to shortening the length L of the opening / closing lid holder 102, and the length L tends to be considerably long. Therefore, in the state where the opening / closing lid is closed, the protrusion of the tip of the opening / closing lid holder 102 protruding inside the fixed body becomes large. Therefore, for example, when it is used for attaching a paper pressing pressure plate of a copying machine, the opening / closing lid holder 1 moves inwardly toward the upper surface of the apparatus main body in the closed position of the pressure plate.
02 will protrude for a long time, and since the protruding portion cannot be located on the glass surface for exposure,
The size of the exposure glass surface is restricted, or an extra plate surface for mounting the protruding tip of the opening / closing lid holder 102 on the upper surface of the apparatus body to secure the exposure glass surface of a predetermined area. Therefore, there is a problem that the size of the device to which the hinge device is attached and used is unnecessarily increased.

Further, as described above, depending on the opening angle of the opening / closing lid holder 102, the support shaft 10 of the opening / closing lid holder 102 caused by the weight of the opening / closing lid.
Since the moment in the closing direction around 0 changes, the sliding surface 106 is not affected by such a change in the moment in the closing direction.
In order to stabilize the balance with the frictional force due to the sliding of the spring and reliably exhibit the free stop function, two types of long and short coil springs 14 and 15 are required, and there has been a problem that the configuration becomes complicated accordingly. .

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and a structure for exhibiting a free stop function is skillfully incorporated in a narrow space, so that the whole can be made compact. By using only one kind of elastic member, it is possible to exhibit a reliable and stable free stop function regardless of the opening angle of the lid, and to reduce the size and simplification of the equipment to be used. It is an object of the present invention to provide a hinge device for an openable lid that can be achieved.

[0008]

In order to achieve the above object, a hinge device for an opening / closing lid according to the present invention is provided such that it is attached to a fixed body and arranged at both ends in the width direction of the attached portion. A fixing member mounting member having a pivot portion connected at right angles to the portion, and a mounting portion of the opening / closing lid and one of the pivot portions of the fixing member mounting member disposed at one end in the width direction of the mounting portion. A lid mounting member having a pivot portion connected to the mounting portion at right angles to the mounting portion so as to be in sliding contact with the inner surface is inserted into each of the pivot portions of both mounting members and fixed to the fixed body mounting member side. A hinge device for an opening / closing lid body which is relatively swingably connected via a support shaft, wherein the lid mounting member has the pivot portion on the lid mounting member side as a bottom portion, and the support shaft And a concentric bottomed hole is formed. A nut-like member screwed into a female screw portion formed on the inner peripheral wall portion in the bottom hole is held integrally rotatably with respect to the support shaft and movably in the support shaft direction. An elastic member whose elastic repulsive force is increased by axial movement of the lid mounting member when the lid mounting member is rotated in the closing direction of the lid between the pivot mounting portion on the lid mounting member side and the pivot support portion; Is wound around the support shaft and interposed therebetween.

In particular, one end surface of the support shaft faces the outer surface of the pivot portion of the fixed body mounting member, and the nut-shaped member is rotated through the support shaft to move in the axial direction, so that the elastic member is used. It is desirable to form an engaging portion of the rotary operation tool that can adjust the initial elastic repulsion.

[0010]

According to the present invention, a moment in the closing direction around the support axis acts on the lid mounting member by the weight of the opening / closing lid attached to the mounting portion of the lid mounting member, and the opening / closing lid and its As the opening angle of the mounting member increases, the moment decreases, and conversely, as the opening angle decreases, the moment increases. Here, with the change of the opening angle of the opening / closing lid and its mounting member, the lid mounting member is rotated relative to the spindle along the lead of the threaded portion on the outer periphery of the nut-shaped member. Move in the axial direction. The amount of compression of the elastic member changes due to the axial movement of the lid attaching member, and the elastic repulsion of the elastic member increases as the opening angle of the opening / closing lid decreases. As a result, only by using one elastic member, the sliding contact resistance between the pivoting portions of the two mounting members that are in sliding contact with each other, that is, the friction braking force between the two portions changes, and the moment in the closing direction and its friction are changed. The braking force is always in a balanced state, and a reliable free stop function can always be obtained regardless of the opening angle of the opening / closing lid.

By the way, the nut-like member and the elastic member are respectively inserted into bottomed holes formed in the cover mounting member, coaxially with the support shafts inserted through the respective pivot portions of the cover mounting member and the fixed body mounting member. Incorporating all of the essential components for exerting the above-mentioned free stop function in a narrow space between the pivot portions of the two mounting members, such as storing, the whole can be made compact, and in particular, the lid The length of the body attachment member can be reduced to the minimum necessary length, which contributes to downsizing of a device to which the body attachment member is used.

In particular, one end surface of the support shaft faces the outer surface of the pivot portion of the fixing member mounting member, and the nut-like member is rotated through the support shaft to move in the axial direction, so that the elastic member is used. If an engaging portion of a rotary operation tool that can adjust the initial elastic repulsion is formed, a change in the weight of the opening / closing lid attached to the lid attaching member, or a dimension of the hinge device such as the size of the elastic member. When the dimensional accuracy of the component parts varies, the nut-shaped member is rotated by rotating the spindle by engaging the tip of a rotary operation tool with the engaging portion facing the outer surface. By moving axially along the lead of the female thread formed on the inner peripheral wall of the bottom hole, the initial elastic repulsion by the elastic member is adjusted, and a predetermined frictional control is performed according to the weight of the opening / closing lid. Power can be set appropriately .

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a longitudinal sectional view of a hinge device for an opening / closing lid according to an embodiment of the present invention, and FIG. 2 is a side view of the hinge device. In FIG. A mounting portion 1a to the fixed body and a pair of substantially disk-shaped pivot portions 1b, 1b arranged at both ends in the width direction of the mounting portion 1a and connected to the mounting portion 1a at right angles to each other; It has a U-shaped cross section.

Reference numeral 2 denotes a cover attaching member, for example, an attaching portion 2a for fixing an opening / closing cover such as a paper pressing plate of a copying machine or a stereo lid via screws (not shown) and the attaching portion 2a. At one end in the width direction of the fixed body mounting member 1, and has a pivotal support portion 2 b provided at right angles to the mounting portion 2 a so as to slide on the inner surface of one of the pivotal support portions 1 a of the fixed body mounting member 1. A substantially cylindrical bottomed hole 2c that opens to the other pivotal support portion 1a side of the fixed body mounting member 1 with the pivotal support portion 2b as a bottom portion is formed. On the inner peripheral wall of the bottomed hole 2c, a female screw portion 4 is formed over the entire length in the axial direction.

Reference numeral 3 denotes a support shaft, which is inserted through a pair of pivot portions 1b, 1b of the fixed body attaching member 1, a pivot portion 2b of the lid attaching member 2, and a center of the bottomed hole 2c to fix the fixed member. The body mounting member 1 is configured to be fixedly held on the fixed body mounting member 1 via a set screw 14 such as a screw screwed to one pivot portion 1b of the body mounting member 1. The members 1 and 2 are pivotally supported and connected so as to be relatively swingable. The support shaft 3 includes a small-diameter shaft portion 3a and a large-diameter shaft portion 3a.
b, and a small-diameter shaft portion 3a of which the two supporting members 1 and 2 are in sliding contact with each other.
The large-diameter shaft portion 3b is formed in a D-shaped cross section by cutting out a part of the outer peripheral surface of the large-diameter shaft portion 3b which is penetrated by the bottom hole 2b and is concentric with the bottomed hole 2c. ing. The shaft end face of the large-diameter shaft part 3b faces the outer surface of the other pivotal support part 1b of the fixed body mounting member 1, and a tip of a rotary operation tool such as a screwdriver can be engaged with the shaft end face. An engagement portion 5 is formed.

Numeral 6 denotes a nut-shaped member which is disposed in the bottomed hole 2c, and has a male screw portion 6a formed on the outer periphery thereof screwed with the female screw portion 4 and formed on a shaft core thereof. The D-shaped hole 6b is inserted into the large-diameter shaft portion 3b having a D-shaped cross section of the support shaft 3, whereby the nut-shaped member 6 can rotate integrally with the support shaft 3, Further, it is configured to be slidable in the axial direction of the support shaft 3.

Reference numeral 8 denotes a compression coil spring which is an example of an elastic member. The compression coil spring 8 is wound around the support shaft 3 located in the bottomed hole 2c to form a pivotal support portion 2b of the cover attaching member 2 and the nut-like portion. The compression coil spring 8 interposes one of the pivots 1b of the fixing member 1 and the pivots 2 of the lid attaching member 2.
b are elastically slidably contacted with each other to apply a frictional force therebetween. The compression coil spring 8 is compressed by the lid mounting member 2 that moves axially along the lead of the external male screw portion 6a of the nut-shaped member 6 when the lid mounting member 2 rotates in the closing direction. The resilience is configured to be increased.

As shown in FIG. 5, for example, as shown in FIG. 5, the hinge device A for the opening / closing lid has a rectangular annular upper surface plate portion 12 formed around the exposure glass surface 11 of the copying machine body 10. Then, the mounting portion 1a of the fixed body mounting member 1 is fixed via a screw or the like, and the mounting portion 2a of the lid body mounting member 2 is screwed to the paper pressing pressure plate 13 which is an opening / closing lid. By fixing through
The sheet pressing pressure plate 13 is used so as to be opened and closed with respect to the upper surface plate portion 12 and the exposure glass surface 11 through swinging around the support shaft 3.

In such a state of use, the lid mounting member 2 moves along the lead of the male screw portion 6a on the outer periphery of the nut-like member 6 with the change of the opening angle of the paper pressing pressure plate 13 and the mounting member 2 thereof. The amount of compression of the coil spring 8 is changed by the axial movement of the lid mounting member 6, and the pivotal support portions 1 b, The sliding resistance between the two parts 2b, that is, the friction braking force between the two parts changes.

More specifically, as shown in FIGS. 3 and 4, when the opening angle θ of the sheet pressing pressure plate 13 and its mounting member 2 is large and the moment in the closing direction is small, the compression amount of the coil spring 8 is small. As shown in FIGS. 1 and 2, the smaller the opening angle θ of the sheet pressing pressure plate 13 and its mounting member 2 and the larger the moment in the closing direction, the larger the coil spring 8. Is increased, and the friction braking force is also increased. As described above, the paper pressing plate 13
The friction braking force changes according to the opening angle of the sheet, and the state is always in balance with the moment in the closing direction. Therefore, regardless of the opening angle of the sheet pressing pressure plate 13, a reliable free stop function can always be exerted. Thus, the opening and closing operability of the sheet pressing pressure plate 13 can be made easy and favorable.

By the way, in the hinge device having the above-described structure, the nut-shaped member 6 and the coil spring 8 are inserted through the respective pivot portions 1b, 1b, 2b of the fixed body attaching member 1 and the lid attaching member 2. All of the essential components for exerting the above-mentioned free stop function, such as fitting and winding around the support shaft 3, are formed between the pivot portions 1 b, 2 b of the mounting members 1, 2. And is very compact as a whole.
The length L1 can be kept to the minimum necessary, so that the tip of the lid attaching member 2 moves inward of the upper plate 12 of the copier main body 10 in the closed position of the paper pressing pressure plate 13. The protruding allowance protruding toward is very short. As a result, the width of the upper plate 12 occupied by the cover attaching member 2 can be reduced, and the area occupied by the exposure glass surface 11 with respect to the entire upper surface area of the copying machine main body 10 can be increased. Can be downsized.

The mounting portion 2 of the lid mounting member 2
The weight of the opening / closing lid, such as the paper presser plate 13 fixed to a, may change, and accordingly, the moment in the closing direction may change. In this case, the set screw 14 is loosened to loosen the support shaft. In a state where the fixation of the fixing member 3 is released, a rotating operation tool such as a screwdriver is attached to the engaging portion 5 formed on the shaft end surface of the support shaft 3 so as to face the outer surface of the one pivotal support portion 1b of the fixed body mounting member 1. The nut-shaped member 6 rotating integrally with the support shaft 3 is axially moved along the lead of the female screw portion 4 by rotating the support shaft 3 by engaging the tip of It is possible to adjust the elastic repulsion. Accordingly, it is possible to easily set an appropriate frictional braking force that balances the moment in response to the increase or decrease in the moment in the closing direction due to the change in the weight of the opening / closing lid such as the sheet pressing pressure plate 13. After such adjustment, the set screw 14 is tightened to fix the support shaft 3 and the nut-shaped member 6, so that a reliable free stop function can be always exerted regardless of the opening angle, as described above.

Further, when the friction braking force has an error with respect to the set value due to a variation in the manufacturing accuracy and assembly accuracy of the hinge device components, such as a variation in the dimensions of the coil spring 8, the above-described case will be described. Similarly to the case of the weight change, with the set screw 14 being loosened and the fixing of the support shaft 3 being released, the tip of a rotary operation tool such as a screwdriver is engaged with the engaging portion 5 to thereby support the support shaft 3. It is possible to easily produce a predetermined braking friction force by performing an adjusting operation such as rotating.

FIG. 6 is a longitudinal sectional view of a hinge device for an opening / closing lid according to another embodiment of the present invention, in which hinge devices of the type shown in FIG. In the same figure, the same reference numerals are given to the parts corresponding to the constituent members in FIG. 1, and the left constituent members are denoted by L and the right constituent members are denoted by R as branch codes. Therefore, detailed descriptions thereof are omitted. The double hinge device for the open / close lid of the embodiment shown in FIG. 6 can be effectively used especially as a hinge device for the open / close lid having a large weight and a large shape.

When the opening angle of the paper pressing plate 13 and the like of the copying machine is 5 to 10 ° or less, a free stop function is not required, but a force for pressing a document or the like against the glass surface 11 is required. At this time, the adjustment is very difficult with the conventional hinge device as shown in FIG. 7, but according to the hinge device having the configuration as shown in each of the above-described embodiments, the initial axial position of the nut-shaped member 6 is determined. By the adjustment, it is possible to obtain the intended pressing force. Therefore, conventionally, in many cases, a suction device such as a magnet catch is used to compensate for the shortage of the pressing force, and the sheet pressing pressure plate 13 is positively suctioned to obtain a desired pressing force. When the hinge device according to each embodiment of the present invention is used, such a suction device is not required, and the structure can be further simplified.

In the above embodiment, a coil spring is used as the elastic member 8, but a disc spring may be used. In the above embodiment, a large-diameter shaft portion 3b having a D-shaped cross section and a D-shaped hole formed in the shaft core portion of the nut-shaped member 6 are provided so that the support shaft 3 and the nut-shaped member 6 can be integrally rotated. 6b is adopted, but the outer peripheral surface of the support shaft 3 is made non-circular such as a square or a key is interposed between them, and the corresponding through-hole of the shaft core of the nut-like member 6 is formed. May also be non-circular.

[0027]

As described above, according to the present invention, there is provided a free stop function for stopping the opening / closing lid at an arbitrary opening angle, and the opening / closing operability of the opening / closing lid can be made easy and favorable. In addition, the components for exhibiting the free stop function are skillfully inserted into the bottomed hole formed between the pivotal support parts that connect the fixed body mounting member and the lid body mounting member so that they can swing relatively via the support shaft. By incorporating it, the entire hinge device can be made compact. In particular, since the length of the cover attaching member can be kept to the minimum necessary, there is no need to unnecessarily increase the size of the apparatus such as a copying machine to which the hinge device is mounted, and the size of the apparatus can be reduced.

In addition, with the change of the opening angle of the opening / closing lid and its mounting member, the lid mounting member is integrally fixed to the supporting shaft along the lead of the male screw portion on the outer periphery of the nut-shaped member. By moving in the axial direction, the smaller the opening angle of the opening / closing lid, the larger the elastic repulsion force of the elastic member can be changed, so that the two members slidingly contacting each other have a simple configuration using only one elastic member. The friction braking force between the pivots of the mounting member is always changed to a state in which the moment in the closing direction is inversely proportional to the opening angle, so that it is always reliable and stable regardless of the opening angle of the opening / closing lid. Free stop function can be exhibited.

[0029] In particular, one end face of the upper Symbol shaft, when forming the engagement portion of the rotary operation tool to face the outer surface of the pivot portion of the fixed body attachment member is attached to the lid attachment member When there is a variation in the weight of the opening / closing lid or in the dimensional accuracy of the components of the hinge device such as the size of the elastic member, the tip of the rotary operation tool is engaged with the engaging portion facing the outer surface to support the hinge. By simply rotating the shaft, the nut-shaped member can be moved in the axial direction along the lead of the female screw portion formed on the inner peripheral wall of the bottomed hole to adjust the initial elastic repulsive force of the elastic member, and the opening / closing lid It is possible to appropriately and easily set a predetermined friction braking force adapted to the weight of the body and the like, so that it can be widely used as a hinge device for an opening / closing lid having a different weight.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing a hinge device for an opening / closing lid according to an embodiment of the present invention.

FIG. 2 is a side view of FIG.

FIG. 3 is a longitudinal sectional view showing a fixed opening angle state.

FIG. 4 is a side view of FIG. 3;

FIG. 5 is a schematic perspective view showing a usage example.

FIG. 6 is a longitudinal sectional view of a hinge device for an opening / closing lid body according to another embodiment of the present invention.

FIG. 7 is a perspective view showing the structure of a hinge device generally used conventionally.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 fixed member attaching member 1a attaching portion 1b pivot portion 2 lid attaching member 2a attaching portion 2b pivot portion 2c bottomed hole 3 support shaft 4 female screw portion 5 engaging portion 6 nut-shaped member 8 coil spring (elastic member) 10 copying machine Main body (fixed body) 13 Pressure plate for paper press (opening / closing lid)

Claims (1)

(57) [Claims] 1. A fixed body mounting member having a mounting portion to a fixed body and pivotal portions arranged at both ends in the width direction of the mounting portion and connected to the mounting portion at right angles to the mounting portion; Lid body having a mounting portion and a pivot portion disposed at one end in the width direction of the mounting portion and connected to the inner surface of one of the pivot portions of the fixed body mounting member at right angles to the mounting portion so as to slidably contact the inner surface of the mounting portion. A hinge device for an opening / closing lid body, wherein the mounting member is inserted into each of the pivot portions of both of the mounting members so as to be relatively swingably connected via a support shaft fixed to the fixed body mounting member. The lid mounting member has a bottom with the pivot portion on the lid mounting member side and a concentric bottomed hole formed with the support shaft, and an inner peripheral wall portion of the bottomed hole. The nut-shaped member screwed into the formed female screw portion is The lid-mounting member is rotatably held in the direction of the support shaft so as to be integrally rotatable, and the cover-mounting member is turned in the closing direction of the cover between the nut-shaped member and the pivot portion on the lid-mounting member side. When moved, an elastic member whose elastic repulsion force is increased by the axial movement of the lid attaching member is wound around the outer periphery of the support shaft and interposed therebetween.
On one end face of the fixed body mounting member,
And rotate the nut-shaped member through the support shaft to
To adjust the initial elastic repulsion force of the elastic member.
A hinge device for an opening / closing lid, wherein an engaging portion of a rotary operation tool that can be adjusted is formed .