JP2004108113A - Automatic return hinge and door system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a door system having an automatic return hinge accurately returning to the return position of a door set at an arbitrary position. <P>SOLUTION: The folding type door system 1 has a support mechanism 18 and a hinge unit 22. An upper pivot 15 includes an automatic return hinge mechanism having a double angular cam 60, a return spring part 40 and a multi-stage polygonal shaft 48 penetrating and fitted in both the members. The cam 60 includes an upper cam 61 rotating together with a casing 33 rotating upon opening and closing the door, and a lower cam 65 externally fitted to the multi-stage polygonal shaft 48 so as to be vertically movable and incapable of rotating, connected to the upper cam 61 and sliding downward in accordance with the rotation of the upper cam 61. The multi-stage polygonal shaft 48 has a cylindrical head 48a protruding on the upper part of the casing 33 fixed to a shaft adjusting fitting 51 provided in a door frame 11 at an arbitrary rotary position. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a door system using a hinge unit that is interposed between opening and closing bodies to smoothly perform the opening and closing operation of the opening and closing body, and particularly to a door return position set at an arbitrary position with high accuracy. The present invention relates to a door system having an automatic return hinge that returns.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, hinges can be attached to another opening or closing body such as a hinged door or a folding door so as to be freely opened and closed, and are frequently used everywhere.
[0003]
One of the most common hinges is a hinge 100 having a one-point fulcrum structure shown in FIG. The hinge 100 is obtained by combining two mounting plates 100b and 100c so as to be able to rotate (rotate) with each other around a common shaft 100a. The two panel bodies 101a and 101b to be formed are attached to opposing side surfaces. As a result, the panel bodies 101a and 101b are folded in two around the fixed shaft 102 as shown by a solid line and an imaginary line, and the slide shaft 103 slides in a rail body (not shown) so as to be openable and closable.
[0004]
As a modification of the one-point fulcrum structure, a hinge 110 having a two-point fulcrum structure shown in FIG. 13 is also known. The hinge 110 is a so-called "overall hinge" (also referred to as "through hinge") that is attached to the entire side surface of the panel bodies 111a and 111b in the vertical direction. The hinge 110 includes two shafts 110a and 110b that individually rotate the panels 111a and 111b, mounting plates 110c and 110d that rotate about the two shafts 110a and 110b, and a hinge between the two shafts 110a and 110b. And a connecting member 110e for connecting the two. Thus, when the folding door 111 is opened, the panel bodies 111a and 111b rotate while being folded in two from the state shown by the solid line to the state shown by the virtual line.
[0005]
An example of another type of hinge is shown in FIG. The hinge 120 also has the structure of the entire hinge, and has two fulcrums. The hinge 120 includes a pair of mounting plates 120a and 120b which are attached to the panel bodies 121a and 121b and whose one ends are curved, and a connecting body 120c which rotatably connects the mounting plates 120a and 120b. Gears are formed inside and outside the curved portions of the mounting plates 120a and 120b, respectively, and the mounting plates 120a and 120b mesh with each other with their outer gears. The connecting body 120c is formed to have a concave cross section in the transverse direction as shown in the figure, and cylindrical portions 120d and 120e are integrally formed inside the two protruding ends. A gear is formed on the circumference of each of the cylindrical portions 120d and 120e, and the inner gear of the curved portion of the mounting plate 120a (120b) meshes with the gear. As a result, the panel bodies 121a and 121b can be turned around the two cylindrical portions 120d and 120e, respectively, as shown by a solid line (folded door open state) and a virtual line (folded door closed state) to open and close the folding door. Can be.
[0006]
However, the above-mentioned conventional hinge has the following disadvantages.
[0007]
Although the hinge 100 of the one-point fulcrum shown in FIG. 12 has a simple structure, the gap W1 between the panel bodies 101a and 101b when the door is opened, that is, a dead space is relatively large as shown by the imaginary line in the drawing. In addition, when the folding door is closed from the state of the virtual line in the figure to the state of the solid line, there is a concern that a finger may be pinched in the gap P between the panel bodies 101a and 101b, and this is particularly concerned in children and the like. The corners of the panel bodies 101a and 101b can be formed in a tapered shape or a door stop can be provided so as not to pinch a finger. However, doing so causes problems in manufacturing cost and appearance.
[0008]
Further, the hinge 110 of the two-point fulcrum shown in FIG. 13 has a very small dead space W2 when the panel bodies 111a and 111b are folded, due to the existence of the connector 110e of the hinge 110, as indicated by the phantom line. There is a problem that becomes large. This problem is the same as that of FIG.
[0009]
An unsolved problem common to the structures of FIGS. 12 to 14 is the problem of the center of rotation of the door. This problem is particularly noticeable when applied to Orito. 12 to 14, the center of rotation (rotation) between the panel bodies is shifted to one side in the opening and closing direction from a center line L1 (to L3) passing through the center in the thickness direction of the panel. .
[0010]
Therefore, when one of the panel bodies 101a (111a, 121a) is opened and closed, the side end of the panel body 101a ((111a, 121a) opposite to the hinge is like a virtual line M in FIG. In this case, a trajectory that opens and closes once after expanding in the wall direction is drawn, and therefore a large space WD has to be previously set between the wall (fixed body) and the panel body 101a (111a, 121a). The gap WD must be at least about 1 cm for a commonly used folding door, which is a considerably large value for the gap between the doors, resulting in poor partitioning. To close this gap WD, it is possible to add a door stop to the wall side, but it is not possible to improve the appearance and increase the manufacturing cost. There occurs.
[0011]
In view of the above-mentioned problems of conventional hinges, the present inventor has proposed a hinge unit having a simple structure, practically no fear of pinching a finger, and having excellent partitioning properties at the time of closing and this hinge unit. In order to provide a door system using the hinge unit, a hinge unit described in Patent Literature 1 and Patent Literature 2 and a door system using the hinge unit have been proposed.
[0012]
According to the hinge unit and the door system using the hinge unit, the simple structure having the pillar, the gear, and the connecting body as main parts eliminates entrapment of an object when shifting from the open state to the closed state. Thus, an excellent effect that the dead space in the open state can be reduced, and the sealing performance in the closed state can be improved to improve the partitioning property can be exhibited.
[0013]
The folding door type door system using the hinge unit can further open the door by pushing or pulling if the center of rotation of the door is located on the center line in the thickness direction of the panel. It has the advantage that the door can be opened both to the outside and the outside. Therefore, even if the user holds the baggage in both hands and is closed, it is possible to push the door open by depositing a part of the body at the end of the door panel.
[0014]
However, in order to close the door with both hands closed after passing through the door, the door must be pushed and closed again by depositing a part of the body on the open and protruding end of the folding door. After achieving the intended purpose of passing the door with both hands closed, it is troublesome to close the door even if it is a healthy person, but for wheelchair consumers, the wheelchair can be turned 180 degrees. In order to change the direction and close the door and move forward, the wheelchair must be turned again by 180 degrees to change the direction, and the burden is not small. In particular, work is particularly difficult in a small place such as a toilet or a corridor (originally, folding doors are often provided in such a small place). Therefore, it is required that the folding door using the hinge unit be a self-closing folding door.
[0015]
Also, among self-closing folding doors, instead of starting to return to the original position immediately after full opening, the door can be closed and stopped in the fully open state, and the door can be closed by applying a slight force when necessary. Things may be preferred.
[0016]
On the other hand, for example, the door of a toilet booth in a public facility is desirably open so that it can be seen at a glance when it is not in use, but it is always beautiful to see the toilet fully exposed from the outside of the toilet booth. In some cases, this is not preferred. In such a case, when not in use, the door can be stopped at a predetermined position between the fully open and fully closed positions.In use, the door is closed by pushing or pulling the door, and the closed state is maintained by latching. Alternatively, it is convenient if the door can be automatically returned to the original predetermined position by unlocking the thumb-turn or unlocking the thumb-turn after use by locking with the thumb-turn.
[0017]
Conventionally, as such an automatic return hinge, the one described in Patent Document 3 is known. The automatic return hinge rotatably fits the movable cam barrel into a pivot fitting attached to the door side, and is elastically provided between the end of the sliding cam barrel opposite to the cam surface and the ring cap. The sliding cam cylinder, which is constantly urged in contact with the movable cam cylinder by the large-diameter coil spring, is fitted so that it can move up and down and rotates integrally with the pivot fitting. A polygonal shaft that is slidably fitted in the axial direction and that rotates integrally with the movable cam cylinder is elastically provided above the pivot fitting between the engaging step of the polygonal shaft and the ring cap. The coil spring is urged to a protruding state, and the end of the polygonal shaft is inserted into a polygonal hole of a support fitting attached to the door frame side so that the return position of the door can be selectively set.
[0018]
[Patent Document 1]
Japanese Patent No. 2728642
[0019]
[Patent Document 2]
JP-A-9-273350
[0020]
[Patent Document 3]
Japanese Utility Model Registration No. 2604809
[0021]
[Problems to be solved by the invention]
However, the automatic return hinge described in Patent Document 3 has a problem that the accuracy of the return position is not perfect. The automatic return hinge described in Patent Literature 3 is configured to automatically move a door to a return position by vertically sliding a sliding cam barrel having a guide projection that is engaged with a guide groove provided in the pivot fitting. However, a gap, i.e., play, occurs between the guide groove and the guide projection due to the mechanism of sliding up and down. Even if the error caused by this play is small at the hanging point, it expands in proportion to the distance at the tip of the door panel. For example, the room does not return to the fully closed state and requires some degree of partitioning without locking. Then you may not be able to overlook. Conversely, if a door stop is provided, this can be prevented, but it cannot be adopted in a universal door having a structure that opens to both the outside and the inside of the room.
[0022]
The present invention has been made in view of the above circumstances, and relates to a folding door system using a hinge unit, and relates to a door system having an automatic return hinge that accurately returns to a return position of a door set at an arbitrary position. The purpose is to provide.
[0023]
It is another object of the present invention to provide a door system further including a mechanism capable of holding a fully open state in the door system.
[0024]
[Means for Solving the Problems]
The automatic return hinge according to the present invention includes an automatic return hinge mechanism in a housing attached to the door side, as described in claim 1, in order to solve the above-described problem. A double chevron cam portion fitted in the housing, a return spring portion fitted in a lower portion thereof and having a fixed lower end, and a multi-stage polygonal shaft for communicating and inserting the two; An upper cam that is inserted into the housing and that is integrally rotatable with the housing that rotates with the opening and closing of a door; and an upper cam that is vertically movable and non-rotatably fitted to the multi-stage polygonal shaft. A lower cam that is cam-coupled to the cam and slides downward in accordance with the rotation of the upper cam, wherein the multi-stage polygonal shaft has a cylindrical head protruding upward from the housing on the door frame side. Fixed at any rotational position Than it is.
[0025]
Next, in order to solve the above-described problem, the multi-stage polygonal axis of the automatic return hinge according to claim 2 has a cross section formed into a hexagon.
[0026]
In order to solve the above-mentioned problem, the door system according to claim 3 slidably suspends the panel body by a suspension rail provided at a lower portion of the upper frame on the door frame side along a width direction of the door opening. And a supporting mechanism comprising an upper pivot and a lower pivot. The two panel bodies are brought into contact with each other along their longitudinal sides at adjacent side end faces, and rotated with respect to each other. A door system comprising a hinge unit movably hinged, wherein the upper and lower pivots are provided with an automatic return hinge mechanism in a housing attached to a door side, wherein the upper panel is provided with a hinged unit. Comprises a double angled cam portion fitted at the upper portion, a return spring portion fitted at the lower portion thereof and having a fixed lower end, and a multi-stage polygonal shaft for communicating and inserting the both. An upper cam that is inserted into the housing and that is rotatably provided with the housing that rotates with opening and closing of a door, and that is externally movably and non-rotatably fitted to the multi-stage polygonal shaft; And a lower cam that is cam-coupled to the upper cam and slides downward according to the rotation of the upper cam. The multi-stage polygonal shaft has a cylindrical head protruding upward from the housing and has a cylindrical head. Is fixed at an arbitrary rotation position to the shaft adjustment bracket provided in the above.
[0027]
In order to solve the above-mentioned problem, the door system according to claim 4 attaches a magnet at a position in the suspension rail that abuts on an upper pivot side end of the suspension wheel, and attaches the suspension wheel to the magnet. And the door is held in the fully open position.
[0028]
BEST MODE FOR CARRYING OUT THE INVENTION
An embodiment of a door system using a hinge unit and an automatic return hinge according to the present invention will be described with reference to the accompanying drawings. First, the overall configuration of a door system using the hinge unit and the automatic return hinge according to the present embodiment will be described. In the present embodiment, a description will be given with the fully closed state set as the return position.
[0029]
As shown in FIG. 1, the three-sided frame body 11 and the floor surface 12 define an opening OP that forms an entrance of a room. The three-sided frame 11 is formed by integrally forming an upper frame 11u and vertical frames 11s, 11s on both sides thereof. The door system 1 is attached to the inside of the three-sided frame 11 so as to be openable and closable.
[0030]
The door system 1 includes a folding door 20 composed of two panel bodies, and a support mechanism 18 that supports the folding door 20 so that the folding door 20 can be opened and closed. The support mechanism 18 includes a suspension rail 14, an upper pivot 15, a lower pivot 16, and a six-wheel suspension wheel 17, and also serves as a suspension mechanism.
[0031]
As shown in FIG. 1, the upper frame 11u of the three-sided frame body 11 cuts out a predetermined region of 以上 or more in the width direction thereof, and the hanging rail 14 is embedded in the cutout portion.
[0032]
In FIG. 1, an upper pivot 15 is fixed in the left end of the suspension rail 14, and a lower pivot 16 is buried on the opposing floor surface 12 directly below the upper pivot 15. The upper pivot 15 is configured in a pivot structure, and an automatic return hinge 30 housed in the rotating column 21 rotatably connects the folding door 20 to the upper frame 11u.
[0033]
On the other hand, a bearing for rotatably supporting the rotating column 21 in a pivot structure is attached to the lower end surface of the rotating column 21 so as to insert a pivot shaft erected from the floor surface. I have.
[0034]
The six-wheel suspension wheel 17 is accommodated in the suspension rail 14 as shown in FIGS. 1 and 11, and is disposed so as to be freely movable along its longitudinal direction. A six-wheel suspension wheel 17 has a rotatable axle 17a suspended therefrom. The axle 17a is fixed to a predetermined position on the upper end surface of the panel body 20b. As shown in FIG. 4, the fixed position is set at a predetermined position such that the folding door 20 is perpendicular to the three-sided frame 11 so that the passable width is maximized when the door is fully opened. The six-wheel suspension wheel 17 has a strength capable of supporting at least the suspension load of the panel body 20b. With the opening and closing of the door, the six-wheel suspension wheel 17 also rolls and moves in the suspension rail 14 to allow the panel body 20b to slide and the rotation of the axle 17a to allow the panel body 20b to swing. . Note that the side surface of the suspension rail 14 is blindfolded by the cover 19. The six-wheel suspension wheel 17 does not have to have six wheels as long as the six-wheel suspension wheel 17 rolls smoothly in the suspension rail and does not shake right and left.
[0035]
In the door system 1, the folding door 20 forms a main part of an opening / closing body that opens and closes the opening OP, and includes two panel bodies 20a and 20b and a hinge unit 22 provided between the panel bodies 20a and 20b. And a rotating column 21 as a column fixed to one side of the panel body 20a. The main part of each of the panel bodies 20a and 20b is made of a wooden material here, and is formed to a predetermined thickness and size.
[0036]
The rotating column 21 has a function of supporting the panel body 20a in a swingable manner by the upper pivot 15 and the lower pivot 16. In addition, the load of the panel body 20a is supported by the upper pivot 15 and the lower pivot 16, and the load of the panel body 20b is mainly suspended by the six-wheel suspension wheel 17, and the loads of both are transmitted via the hinge unit 22. Mutually transmitted to other panels.
[0037]
The hinge unit 22 includes two support members 23a and 23b, as shown in FIGS. Each of the support members 23a and 23b is made of a material made of aluminum in the form of a rod or a column having a substantially semicircular cross section. The length of the support members 23a and 23b substantially matches the height of the panel members 20a and 20b. The maximum diameter matches the thickness of the panel bodies 20a and 20b.
[0038]
As shown in FIGS. 2 and 3, spur gears 25a and 25b are fixed to upper and lower end surfaces of the columns 23a and 23b via fixed shafts 24a and 24b, respectively. Each of the spur gears 25a and 25b is made of, for example, resin and has a thickness in the axial direction of, for example, as thin as about 1 cm. The two spur gears 25a and 25b can mesh with each other, and the upper ends (or lower ends) thereof are connected to each other by a thin connecting plate 26 in the meshed state. Both ends of the connecting plate 26 are rotatably mounted on bolts 27a, 27b fixed at the axial center of the spur gears 25a, 25b. For this reason, the spur gears 25a and 25b are connected while being engaged with each other, and can freely rotate (rotate) with each other. When the spur gears 25a and 25b rotate, the support members 23a and 23b fixed to the spur gears 25a and 25b also integrally rotate around their longitudinal center axes. The spur gears 25a and 25b, that is, the columns 23a and 23b are prevented from shifting in the vertical direction by the stopper mechanism of the bolts 27a and 27b.
[0039]
The distance between the struts 23a and 23b is set to be extremely narrow, about 1 mm, by appropriately selecting the diameter of the spur gears 25a and 25b, the height of the teeth, and the like.
[0040]
The door system 1 of the present embodiment is configured and functions as described above. For this reason, when opening the door, the side of the panel body 20b closer to the side end opposite to the rotary column 21 may be pressed by hand or the like. Thereby, as shown in FIG. 4, the panel bodies 20a and 20b of the folding door 20 swing and slide to the rotary column 21 side while being bent in two around the hinge unit 22 to open the door (FIG. 4). Virtual line I). Thereafter, the door automatically returns to the path shown by the imaginary line I in FIG.
[0041]
According to the embodiment of the present invention, as shown in FIG. 4, the door can be opened by pushing the door to the indoor side and the outdoor side in the same manner. Not required. Therefore, a door knob is not required, and there is no protrusion from the side of the panel body, so that a wider effective traffic width can be secured. However, the door knob is attached to a predetermined position on the outside and indoor side at a predetermined height near the side end opposite to the rotary column 21 of the panel body 20b so that the door knob can be opened by the pulling operation. Is also possible.
[0042]
The space occupied by the movement of the panel body at the time of opening and closing in this manner can be smaller than that of a normal swing door. Therefore, the user can easily open and close the wheelchair.
[0043]
Since the centers of the spur gears 25a and 25b coincide with the center positions of the panel bodies 20a and 20b in the plate thickness direction, the position of the virtual bending center Co of the hinge unit 22 associated with the opening / closing operation is as shown in FIG. And on the center line Lo of the panel bodies 20a and 20b. Accordingly, the movement trajectory of the ends of the panel bodies 20a and 20b at the time of opening and closing does not protrude outward unlike the conventional case. Therefore, the gaps Wa and Wb between the vertical frames 11s and 11s and the panel bodies 20a and 20b can be set extremely small.
[0044]
For this reason, partitionability can be remarkably improved without providing a door stop or the like that hides a gap. In addition, the gap Wo between the panel bodies 20a and 20b in the door open state is substantially zero, and there is almost no dead space, so that a wider passage or the like can be secured.
[0045]
Although the gaps between the vertical frames 11s, 11s and the panel bodies 20a, 20b and the gaps between the panel bodies 20a, 20b in the door closed state are extremely small originally, they are almost completely sealed by further attaching a sealing member. You. Thereby, a much better partitioning property is achieved as compared with the conventional art.
[0046]
Next, the configuration of the upper pivot 15 of the door system according to the present embodiment will be described with reference to FIGS. The upper pivot 15 is composed of an automatic return hinge 30 housed in the rotating vertical column 21 and a connecting portion 50 for connecting the automatic return hinge 30 to the three-sided frame 11.
[0047]
FIG. 5 shows the inside of the automatic return hinge 30 when the folding door 20 is in a fully closed state, that is, in a predetermined returning position. FIG. 6 shows a fully opened state in which the folding door 20 is rotated 90 degrees from the predetermined returning position. 3 shows the inside of the automatic return hinge 30 when the automatic return hinge 30 is taken. FIG. 7 is an exploded perspective view of the automatic return hinge 30.
[0048]
As shown in FIGS. 5 to 7, the automatic return hinge 30 is roughly divided into a double chevron cam portion 60, a return spring portion 40, and a metal-made, for example, cast iron, cylindrical or sleeve-shaped housing 33. It comprises a hinge body 31 incorporating a multi-stage polygonal shaft 48 to be inserted, and a panel body mounting arm 32 projecting horizontally from the top of the hinge body 31 and connected to the upper end of the panel body 20a. The hinge body 31 is fixed to the upper end corner of the panel body 20a by the panel body mounting arm 32.
[0049]
While the cylindrical housing 33 is formed with the lower part open, the top surface is closed once, and then a square quadrangular prism-shaped protrusion projecting from the top of the upper cam 61 of the double chevron cam part 60. A hole 34 having a square shape for fitting and inserting the hole 64 is formed. The panel body mounting arm 32 has a plurality of screw holes 35 for mounting the panel body 20a.
[0050]
As shown in FIGS. 6 and 7, the double chevron cam portion 60 includes an upper cam 61 and a lower cam 65, and has a double cam surface on an inner peripheral side and an outer peripheral side to constitute a double cam mechanism. I have.
[0051]
As shown in FIG. 8, the upper cam 61 is composed of two layers, an outer peripheral layer 62 and an inner peripheral layer 63. On the upper end surface of the upper cam 61, for example, a square pillar-shaped convex part 64 is formed, and this convex part 64 fits into a square hole 34 formed in the top of the cylindrical housing 33. The upper cam 61 is rotated integrally with the cylindrical housing 33.
[0052]
The cylindrical outer peripheral layer 62 of the upper cam 61 has a sloped cam surface 70 formed on the lower end surface, and the inclined cam surface 70 formed on the lower end surface of an inner peripheral layer 63 formed inside the cylindrical outer layer 62. , 70 are formed. A circular center hole 72 is formed on the shaft core side of the upper cam 61 as a shaft hole. The circular center hole 72 has a diameter larger than the outer diameter of the multi-stage polygon shaft so as to be rotatably inserted without contact with the multi-stage polygon shaft 48. The inclined cam surfaces 70, 70 of the outer peripheral layer 62 are symmetrical, and a smooth cam surface which is distributed from the lowest bottom portion 73 to the left and right to the highest top portion 74 is usually formed in a linear gradient shape. The bottom 73 has a straight boundary, and the top 74 has a groove 75 formed downward. Also, the inclined cam surfaces 71 of the inner peripheral layer 63 are symmetrical, and a gentle cam surface which is distributed right and left from the lowest bottom portion 76 to the highest top portion 77 is formed in a linear gradient shape. The bottom 76 has a straight boundary, and the top 77 has a groove 78 formed downward. Here, the grooves 75 and 78 of the tops 74 and 77 are provided for escape to prevent the lower cam 65 from being affected by product accuracy, deformation, wear, and the like.
[0053]
Similarly, the lower cam 65 is also formed in a concentric two-layer structure of an outer peripheral layer and an inner peripheral layer, and a lower end surface is formed to be flat so as to contact the spring receiving upper fixing ring 41 of the return spring portion 40. .
[0054]
The lower cam 65 has a cylindrical outer peripheral layer 66 having inclined cam surfaces 80, 80 on the upper end surface, and inclined cam surfaces 81, 81 on the upper end surface inside the cylindrical outer peripheral layer 66. A cylindrical inner peripheral layer 67 having a polygonal center hole 82 into which the multi-stage polygonal shaft 48 is inserted is integrally formed. Here, the lower cam 65 is integrally rotated with the multi-stage polygon shaft 48, so that the rotation is suppressed even if the upper cam 61 rotates with the opening and closing of the door, and slides up and down along the multi-stage polygon shaft 48. Therefore, the center hole 82 is slidably engaged with the multi-stage polygonal shaft 48. The inclined cam surfaces 80, 80 of the outer peripheral layer 66 are symmetrical, and a smooth cam surface which is distributed from the highest top portion 83 to the left and right bottom portions 84 is formed in a generally linear gradient, and the top portion 83 has a straight ridge line. The bottom portion 84 is provided with an upward groove 85. Also, the inclined cam surfaces 71, 71 of the inner peripheral layer are symmetrical, and a smooth cam surface which is distributed from the highest top portion 86 to the left and right bottom portion 87 is normally formed in a linear gradient shape, and the top portion 86 is straight. The bottom 87 has an upward groove 88 formed therein. The phases of the inclined cam surfaces 80, 80 of the outer peripheral layer 66 and the inclined cam surfaces 81, 81 of the inner peripheral layer 67 are shifted by 180 degrees so that the vertices face each other. Here, the grooves 85 and 88 of the bottom portions 84 and 87 are provided for escape to prevent the lower cam 65 from being affected by product accuracy, deformation, wear, and the like.
[0055]
A return spring portion 40 is provided below the lower cam 65 of the chevron cam portion 60. The return spring portion 40 includes a spring receiving upper fixing ring 41, a coil spring 43, and a spring receiving lower fixing ring 44.
[0056]
The spring receiving upper fixing ring 41 includes a base 41a and a protrusion 41b protruding downward from the base 41a. The diameter of the shaft core is circumscribed with a margin for loose insertion into the multi-stage polygonal shaft 48. And a spring receiving portion is formed on the lower surface. The base 41 a contacts the bottom surface of the lower cam 65, receives the pressure when the lower cam 65 slides downward, and transmits this pressure to the coil spring 43. The projection 41b is inserted into the inside of the coil spring 43 to prevent the coil spring 43 from swaying left and right and coming into contact with the inner wall of the cylindrical housing 33, and the pressure from the lower cam is applied to the spring receiving portion. To be transmitted right below.
[0057]
The spring receiving lower fixing ring 44 includes a base 44a and a protrusion 44b projecting upward from the base 44a, and forms a spring receiving portion on the upper surface thereof. The shaft core portion has a circular center hole 45 having a diameter into which the bolt portion 48d of the multi-stage polygonal shaft 48 is loosely inserted. The bottom surface of the spring receiving lower fixing ring 44 is supported by the long nut 46 and the nut 47 screwed to the bolt portion 48d of the multi-stage polygonal shaft 48, the downward movement is restrained, and the restoring force of the coil spring 43 is secured. I do. At the same time, by adjusting the positions of the long nut 46 and the nut 47, the repulsive force of the coil spring 43 can be adjusted. The bottom surface of the base 44a directly forms the bottom surface of the automatic return hinge main body 31. The protrusion 44b is fitted inside the coil spring 43 and prevents the coil spring 43 from moving left and right and coming into contact with the inner wall of the cylindrical housing 33.
[0058]
The coil spring 43 sandwiched between the spring receiving upper fixing ring 41 and the spring receiving lower fixing ring 44 causes the lower cam 65 that descends following the upper cam 61 that rotates integrally with the rotation of the folding door 20. Utilizing the restoring force, the spring is biased in the direction of pushing back. By the spring action of the coil spring 43 and the cam action of the double cam mechanism of the upper cam 61 and the lower cam 65, the folding door 20 is automatically biased in the direction of returning to the original position, that is, toward the fully closed position. Is done.
[0059]
The multi-stage polygonal shaft 48 is divided into a circular portion 48a, a chamfered polygonal portion 48b, a polygonal portion 48c, and a bolt portion 48d from the top, and a screw hole 49 for attaching a shaft adjusting bracket 51 using a screw is provided at the upper end. Is established. Since the shaft adjusting bracket 51 is fixed to the suspension rail 14 via the mounting bracket, the multi-stage polygon shaft 48 does not rotate even when the folding door 20 is opened and closed.
[0060]
The circular portion 48 a located at the uppermost portion of the multi-stage polygonal shaft 48 is loosely inserted into the bearing hole 52 of the shaft adjustment bracket 51, and is fixed using a hexagon socket set screw 53. As described above, since the portion to be loosely inserted into the bearing hole 52 is circular, it is possible to freely rotate the multi-stage polygon shaft 48 in the bearing hole 52 and set the return position to an arbitrary position. .
[0061]
The chamfered polygonal portion 48b located immediately below the circular portion 48a has a polygonal cross section, but the corners of the polygon are chamfered to fit the bearing portion 54 outside. The diameter of the center hole 58 of the bearing portion 54 is larger than the circular portion 48a and smaller than the diameter of a circumscribed circle circumscribing the polygonal portion 48c. When inserted into the hole 58, the circular portion 48a and the chamfered polygonal portion 48b can be inserted, but cannot be inserted into the lower polygonal portion 48c. Therefore, the mounting work is facilitated and the efficiency is improved.
[0062]
The polygonal part 48c below the chamfered polygonal part 48b forms a main part of the multi-stage polygonal shaft 48. Specifically, the folding door 20 and the upper cam 61 of the chevron cam part 60 are turned. Even if it moves, the multi-stage polygon shaft 48 is integrated with the lower cam 65 to prevent the rotation of the lower cam 65, and slides the lower cam 65 pushed by the rotating upper cam 61 up and down. To move. Therefore, for example, when the cross-sectional shape of the polygonal portion 48c is octagonal, the force of the upper cam 61 to be rotated is stronger, and the center cam 82 of the lower cam 65 and the surface of the multi-stage polygonal shaft 48 tend to slide. , The lower cam 65 may rotate. On the other hand, when the cross-sectional shape of the polygonal portion 48c is quadrangular, vertical sliding between the center hole 82 of the lower cam and the surface of the multi-stage polygonal shaft 48 becomes poor, and it becomes difficult for the sliding to go smoothly. Therefore, it is preferable that the cross section of the polygon portion 48c be a hexagon before and after the polygon. For this purpose, the size of the center hole 82 of the lower cam 65 should not be in close contact with the polygonal portion 48c of the multi-stage polygonal shaft 48, nor should it be loose.
[0063]
The lowermost bolt portion 48d is formed in a rod shape thinner than the polygonal portion 48c or the like, and is screwed so as to screw the long nut 46 and the nut 47 at the end inserted into the return spring portion 40. It is engraved.
[0064]
Since the double chevron cam portion 60, the return spring portion 40, and the multi-stage polygonal shaft 48 that communicates and penetrates them are configured as described above, in order to incorporate them into the housing 33, The upper cam 61, the lower cam 65, the upper spring support fixing ring 41, the coil spring 43, and the lower spring support fixing ring 44 are inserted in this order, and the multi-stage polygonal shaft 48 is inserted therethrough, thereby forming a convex portion on the upper cam 61. 64 is fitted into a square hole 34 formed in the upper part of the housing 33, and the double nuts of the long nut 46 and the nut 47 are screwed to prevent the bolt portion 48d of the multi-stage polygon shaft 48 from being loosened. Combine. Thus, the upper cam 61 is fitted into the housing 33 so as to be rotatable according to the housing 33, and the lower cam 65 is slidable up and down while being prevented from rotating by the multi-stage polygonal shaft 48. It is fitted in the body 33, applies pressure to the coil spring 43, and is urged in a direction to push back the lower cam by the repulsive force, and rotates in a direction opposite to the direction in which the upper cam 61 is rotated by the force. The folding door 20 is returned to the original position by applying a force.
[0065]
Next, the connecting portion 50 for connecting the automatic return hinge 30 to the three-way frame 11 will be described with reference to the drawings. The connecting portion 50 includes a shaft adjusting member 51 for setting the return position of the folding door 20, a bearing portion 54 and an axis adjusting member 51 sandwiched between the shaft adjusting member 51 and the upper part of the housing 33 of the automatic return hinge 30. It consists of a mounting bracket 90 attached to the suspension rail 14.
[0066]
As shown in FIG. 9, the shaft adjusting bracket 50 is a flat rectangular parallelepiped metal block, and is a bearing that allows the circular portion 48 a of the multi-stage polygon shaft 48 to be inserted in a vertical direction at a position deviated to one short side on a plane. A hole 52 is drilled. A screw hole 59 is formed from three side surfaces close to the bearing hole 52 to the center of the bearing hole 52. A set screw 53 with a hexagonal hole is screwed into the screw hole 59, and the circular portion 48a of the inserted multi-stage polygonal shaft 48 is pressed from three directions and fixed so as not to rotate. Thereby, the return position of the folding door 20 can be arbitrarily determined.
[0067]
At the center of the remaining short side of the side surface of the shaft adjusting bracket 51 and at a position biased to the opposite side to the bearing hole 52 through which the multi-stage polygonal shaft 48 having two long sides is inserted, the shaft adjusting bracket 51 is suspended from the suspension rail. Is provided with a mounting hole 90. As shown in FIG. 9, an angle-shaped mounting bracket 91 is attached using a screw 92, and the mounting bracket 91 is bolted to the angle-shaped auxiliary mounting bracket 93 attached to the suspension rail 14, thereby forming a suspension rail. 14 and fixed. In this case, the mounting height is adjusted by a vertically long loose hole 94 formed on the mounting bracket 91 side of the mounting bracket 91. As a result, the shaft adjustment bracket 51 and the multi-stage polygon shaft 48 fixed thereto are stopped at a fixed position without rotating even when the folding door 20 is opened and closed. FIG. 10 shows the connecting portion viewed from another angle.
[0068]
The bearing portion 54 is sandwiched between the non-rotating shaft adjustment fitting 51 and the top of the housing 33 of the automatic return hinge 30 that rotates with the opening and closing of the folding door 20. , And comprises upper and lower washers 55 and 57 and a thrust bearing 56 sandwiched therebetween.
[0069]
The upper pivot 15 of the door system 1 according to the present embodiment is thus a non-rotating shaft adjustment bracket 51, a multi-stage polygonal shaft 48 and a lower cam 65, and an automatic return hinge that rotates as the folding door 20 opens and closes. 30 and the upper cam 61, the interaction between them compresses the coil spring 43 of the return spring portion 40, and the folding door 20 automatically returns to its original position by the restoring force of the coil spring 43. It is configured to be returned to.
[0070]
The door system 1 using the hinge unit and the automatic return hinge according to the present embodiment is configured as described above, and the operation thereof will be described below.
[0071]
When the folding door 20 is opened by pressing the panel body 20b, the panel body mounting arm 32 fixed to the panel body 20a rotates. By the rotation of the panel body mounting arm 32, the housing 33 of the automatic return hinge 30 rotates by the same angle in the same direction. The upper cam 61 of the chevron cam portion 60 in which the convex portion 64 at the top is fitted into the square hole 34 formed at the top of the housing 33 is also rotated in the same manner.
[0072]
On the other hand, the lower cam 65 of the chevron cam portion 60 is externally slidably and non-rotatably fitted on the multi-stage polygon shaft 48 so that the multi-stage polygon shaft 48 is fixed to the shaft adjustment bracket 51. The shaft adjustment bracket 51 does not rotate because it is fixed to the suspension rail 14 via the mounting bracket 91 and the like. Therefore, the upper cam 61 applies a pressure to the lower cam 65 via the inclined cam surface which comes into contact with the lower cam 65 by rotating. Here, the lower cam 65 is restricted from rotating and cannot rotate, but slides downward.
[0073]
When the lower cam 65 slides downward, a pressure is applied to push down the return spring portion 40 against the spring force of the coil spring 43, but the lower portion of the return spring portion 40 is fixed by the nut 57 or the like. Therefore, the coil spring 43 contracts and presses the lower portion of the lower cam 65.
[0074]
Therefore, when the pressing force of the panel body 20b is released, the energy stored in the coil spring 43 of the return spring portion 40 is released, and the restoring force of the coil spring 43 causes the lower side via the spring receiving upper fixing ring 41 to return. The cam 65 is pushed upward. Due to the pushing-up force of the lower cam 65, a cam action is performed in a manner opposite to the case where the folding door 20 is opened, and a force for returning the upper cam 61 to its original state is applied via the inclined cam surface of the upper cam 61.
[0075]
Since the upper cam 61 is fixed at the upper portion, the upper cam 61 rotates in the direction opposite to the direction in which the folding door 20 is opened by the double cam action of the inclined cam surface abutting the lower cam 65, that is, in the closing direction, and returns to the original position. Try to.
[0076]
In this case, the tops and bottoms of the inclined cam surfaces of the inner and outer peripheral layers of the upper and lower cams are pointed convexly or concavely, and are engaged without displacement. For example, the bottom 73 of the outer peripheral layer of the upper cam 61 is concavely sharp, and the top 83 of the outer peripheral layer of the lower cam 65 is convexly sharp.
[0077]
When they are at the predetermined return position, they are engaged with each other and are urged by the coil spring 43. Therefore, as shown in FIG. 5, the movement of the lower cam 65 is restricted, and the occlusion does not shift. When the panel body is pushed or pulled from this state, the rotation of the upper cam 61 causes the upper cam 61 and the lower cam 65 to slide along the inclined cam surfaces 70 and 80, and as shown in FIG. The bottom 73 of the layer and the top 83 of the outer layer of the lower cam 65 move away.
[0078]
Here, when the force for pushing or pulling the panel body 20b is released, the upper cam 61 rotates in the opposite direction due to the restoring force of the coil spring 43, and the upper cam 61 and the lower cam 65 move along the inclined cam surfaces 70, 80. The bottom 73 of the outer peripheral layer of the upper cam 61 and the top 83 of the outer peripheral layer of the lower cam 65 surely return to their original engaged positions, and do not go any further. That is, even if the return force is large at first and the acceleration is too high, this force will eventually attenuate and depends on the strength of the spring, but it can be securely and quickly returned to its original position in a very short time. It returns smoothly and accurately.
[0079]
Thus, according to the door system 1 according to the present embodiment, it is possible to provide a self-closing door that does not allow the inside to be seen when not in use, for example, in a place such as a toilet in a general house.
[0080]
Also, for example, when a number of toilet booths are lined up like a public facility toilet, even when the door of the toilet booth is not used, the door is stopped at a predetermined position between the fully open and fully closed positions. According to the door system according to the present embodiment, the doors of the unused toilet booths can be kept open at the same angle without variation, giving an orderly impression.
[0081]
Next, a second embodiment of the door system using the automatic return hinge and the hinge unit according to the present invention will be described with reference to FIG.
[0082]
As shown in FIG. 11, the door system of the present embodiment is basically different from that of the first embodiment in that the door system is provided with a mechanism capable of maintaining a fully open state. It is substantially the same as the embodiment, and the same reference numerals are given and the description is omitted.
[0083]
FIG. 11 shows a cross section around the upper pivot 15 when the folding door 20 of the door system 2 according to the present embodiment is in a fully opened state.
[0084]
As described in FIG. 4, according to the present embodiment, when fully opened, gap Wo between panel bodies 20a and 20b can be made sufficiently small. In this case, the panel bodies 20a and 20b approach each other until they are almost in contact with each other, and therefore the six-wheel suspension wheel 17 cannot slide further inside the suspension rail 14 toward the vertical frame 11s. The six-wheel suspension vehicle 17 includes a vertically arranged vehicle 17b arranged in two front and rear rows, a vehicle 17c mounted horizontally below the vehicle 17b, and a chassis 17d integrally connecting these vehicles. Of these, the vertical and horizontal wheels 17b and 17c are made of a material such as plastic, and the chassis 17d is made of, for example, a magnetic material having a U-shaped vertical cross section.
[0085]
Here, when the force applied to the panel body 20a of the folding door 20 that has been opened in the fully opened state is released, the folding door 20 automatically returns to a predetermined return position set in advance. However, there are cases where it is desired to keep the door open, such as when a person subsequently passes through the door or works around the door. In such a case, if the magnet 95 is attached to the suspension rail 14 at a position where the magnet 95 comes into contact with the upper pivot 15 side end of the six-wheel suspension wheel 17 at the fully opened position of the door via the magnet mounting bracket 96, the magnet 95 can be easily provided. It is possible to maintain the fully open state. Further, since the magnet 95 is housed in the suspension rail 14, it is not visible from the outside and does not impair the aesthetic appearance.
[0086]
The automatic return hinge 30 according to the present invention has been developed for the purpose of automatically and accurately returning a folding door type door system including the hinge unit 22 to the original position. Although it is most preferable to use the folding door with the folding door 22, it can also be adopted in other types of hinged doors, for example, a one-sided opening door or a two-sided opening door whose panel body opens and closes 180 degrees to the inside and outside of the room. is there.
[0087]
Even in these cases, the universal door provided with the automatic return hinge according to the present invention returns to the original position with high accuracy, and can be used in a room where partitionability is required. In particular, in the case of a conventional double door, it is sometimes seen that the two door panels do not stop at the fully closed position, and are sometimes stopped at different positions, but this also gives a good impression on the appearance. Not something. However, such an inconvenience does not occur if the automatic return hinge according to the present invention is employed.
[0088]
【The invention's effect】
ADVANTAGE OF THE INVENTION According to the door system using the automatic return hinge which concerns on this invention, the door system which has the automatic return hinge which returns to the return position of the door set to arbitrary positions accurately can be provided.
[0089]
Further, as described above, in the door system according to the present invention, it is possible to provide a door system further including a mechanism capable of holding a fully open state.
[Brief description of the drawings]
FIG. 1 is a front view showing an example of a door system according to a first embodiment of the present invention.
FIG. 2 is a partially enlarged view of a gear portion of the hinge unit.
FIG. 3 is a plan view of a gear portion of FIG. 2;
FIG. 4 is a diagram showing a locus of an opening / closing operation of the folding door.
FIG. 5 is a diagram showing the inside of the automatic return hinge when the folding door is at a predetermined return position.
FIG. 6 is a view showing the inside of an automatic return hinge when the folding door is rotated 90 degrees from a predetermined return position.
FIG. 7 is an exploded perspective view of the automatic return hinge.
8A and 8B are diagrams illustrating a double chevron cam, wherein FIG. 8A is a plan view of an upper cam, FIG. 8B is a front view thereof, FIG. 8C is a bottom view thereof, FIG. f) is a plan view, side view, and bottom view of the lower cam, respectively.
FIG. 9 is a cross-sectional plan view of the bearing adjustment fitting.
FIG. 10 is a cross-sectional view illustrating a connecting portion.
FIG. 11 is a view showing a fully open holding mechanism.
FIG. 12 is an operation diagram showing an example of a conventional one-point fulcrum hinge.
FIG. 13 is an operation diagram showing an example of a conventional two-point fulcrum hinge.
FIG. 14 is a partial operation diagram showing an example of a conventional entire hinge.
[Explanation of symbols]
1,2 door system
14 Suspension rail
15 Upper pivot
16 Lower pivot
17 6-wheel suspension vehicle
20 Orito
20a, 20b Panel body
21 rotating column
22 Hinge unit
30 Automatic return hinge
31 Hinge body
33 cylindrical housing
40 Return spring part
43 Coil spring
48 multi-stage polygon axis
51 Axis adjustment bracket
54 Bearing part
56 Thrust bearing
60 Yamagata cam
61 Upper cam
65 Lower cam
95 magnet

Claims (4)

An automatic return hinge mechanism is provided in the housing attached to the door side, and the automatic return hinge mechanism includes a double chevron cam portion inserted in the housing and a return cam fitted in the lower portion and fixed at the lower end. A spring portion, and a multi-stage polygonal shaft for communicating and inserting the both, wherein the cam portion is inserted into the housing, and is provided integrally with the housing that rotates with opening and closing of a door. A multi-stage multi-stage multi-stage shaft, comprising: a cam; The automatic return hinge, wherein the rectangular shaft has a cylindrical head protruding upward from the housing fixed to an axis adjusting bracket provided on a door frame side at an arbitrary rotation position. The automatic return hinge according to claim 1, wherein the multi-stage polygonal shaft has a hexagonal cross section. A suspension mechanism that slidably suspends the panel body with a suspension rail provided along the width direction of the door opening at the lower portion of the upper frame on the door frame side, and a support mechanism including an upper pivot and a lower pivot are provided. A panel unit is provided with a hinge unit that abuts adjacent side end surfaces with each other along the longitudinal direction thereof and that is hinged to the other panel unit so as to be rotatable with respect to the other panel unit. In the door system, the upper pivot is provided with an automatic return hinge mechanism in a housing attached to the door side, and the hinge mechanism has a double chevron cam portion inserted into the upper portion and a lower cam portion inserted into the lower portion. A return spring portion having a lower end fixed thereto, and a multi-stage polygonal shaft for communicating and inserting the both, and the cam portion is inserted into the housing, and rotates with opening and closing of the door. Times An upper cam provided integrally, and a lower cam which is vertically fitted and non-rotatably fitted to the multi-stage polygon shaft and is cam-coupled to the upper cam, and which slides downward according to the rotation of the upper cam. Wherein the multi-stage polygonal shaft has a cylindrical head protruding at an upper part of the housing fixed to an axis adjusting bracket provided on a door frame side at an arbitrary rotation position. . When the door is fully opened, a magnet is attached to the suspension rail at a position in contact with the upper pivot side end of the suspension wheel, the suspension wheel is parked by the attraction of the magnet, and the door is fully opened. The door system according to claim 3, wherein the door system is held.

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