JP3683245B2 - Automatic return hinge and door system - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a door system using a hinge unit that is inserted between opening and closing bodies to smoothly open and close the opening and closing bodies, and in particular, to a return position of a door 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]
Conventionally, hinges such as hinged doors and folding doors can be attached to another open / close body or fixed body so as to be freely opened and closed, and are frequently used everywhere.
[0003]
Among these, a hinge 100 having a one-point fulcrum structure shown in FIG. 12 is an example of the most common hinge. The hinge 100 is a combination of two mounting plates 100b and 100c that are rotatable (rotatable) about a common shaft 100a, and the two mounting plates 100b and 100c are, for example, a folding door 101. The two panel bodies 101a and 101b are attached to opposite side surfaces. As a result, the panel bodies 101a and 101b are bent in half as shown by the solid and virtual lines around the fixed shaft 102, and the slide shaft 103 is slidable in a rail body (not shown) so as to be opened and closed.
[0004]
A hinge 110 having a two-point fulcrum structure shown in FIG. 13 is also known as a modification of the one-point fulcrum structure. The hinge 110 is a so-called “overall hinge” (also referred to as “through hinge”) that is attached over the entire length of the side surfaces of the panel bodies 111a and 111b. The hinge 110 includes two shafts 110a and 110b that individually handle the rotation of the panels 111a and 111b, a mounting plate 110c and 110d that rotate about the two shafts 110a and 110b, and a space 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 half from the solid line to the virtual line.
[0005]
Furthermore, an example of another type of hinge is shown in FIG. This hinge 120 also has a hinge structure as a whole, and has two fulcrums. The hinge 120 includes a pair of mounting plates 120a and 120b that are attached to the panel bodies 121a and 121b and curved at one end, and a connecting body 120c that rotatably connects the mounting plates 120a and 120b. Gears are respectively formed inside and outside the curved portions of the mounting plates 120a and 120b, and the mounting plates 120a and 120b are engaged with each other by the outer gears. As shown in the figure, the connecting body 120c is formed in a concave shape as shown in the figure, and cylindrical portions 120d and 120e are integrally formed inside the protruding ends. A gear is formed on the circumferential portion of each cylindrical portion 120d, 120e, and the inner gear of the curved portion of the mounting plate 120a (120b) is engaged with this gear. As a result, as shown by a solid line (folded door open state) and a virtual line (folded door closed state), the panel bodies 121a and 121b can be rotated around the two cylindrical portions 120d and 120e, respectively, and the folding door is opened and closed. Can do.
[0006]
However, the conventional hinge described above has the following disadvantages.
[0007]
Although the hinge 100 at 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, the dead space, is relatively large as shown in the phantom line in the figure. In addition, when the folding door is closed from the phantom line state to the solid line state, there is a concern that a finger may be caught in the gap P between the panel bodies 101a and 101b, especially in children. The corners of the panel bodies 101a and 101b can be formed into a tapered shape or a door stop can be provided so as not to pinch the fingers, but this causes problems in manufacturing cost and appearance.
[0008]
Further, the hinge 110 of the two-point fulcrum shown in FIG. 13 has an extremely large dead space W2 when the panel bodies 111a and 111b are folded due to the presence of the connecting body 110e of the hinge 110, as indicated by a virtual line. There is a problem of becoming larger. This problem also applies to the case of FIG.
[0009]
Furthermore, there is a problem of the center of rotation of the door as an unsolved problem common to the structures of FIGS. This problem is particularly noticeable when applied to folding doors. 12 to 14, the center of rotation (rotation) between the panel bodies is shifted to one side in the opening / closing direction with respect to the center line L1 (-L3) passing through the center of the panel in the plate thickness direction. .
[0010]
For this reason, when opening and closing one panel body 101a (111a, 121a), the side edge part on the opposite side to the hinge of the panel body 101a ((111a, 121a) is like a virtual line M in FIG. In this case, a trajectory that opens or closes after extending in the direction of the wall is drawn.Therefore, a space WD must be made large in advance between the wall (fixed body) and the panel body 101a (111a, 121a). The clearance WD should be at least about 1 cm for a normal folding door, and the door clearance is considerably large, resulting in poor partitioning.The problem of this partitioning deterioration is that the center of rotation (rotation) is the centerline of the door Although it is unique to hinges with a structure that is off the wall, it is possible to make a door stop on the wall side to close this gap WD, but there is a problem of appearance and an increase in manufacturing cost. Resulting in.
[0011]
In view of the problems of the conventional hinges as described above, the inventor of the present invention has a simple structure, there is practically no fear of pinching fingers, and the hinge unit excellent in partitioning property when closed and the hinge unit In order to provide the door system used, a hinge unit described in Patent Document 1 and Patent Document 2 and a door system using the hinge unit have been proposed.
[0012]
According to this hinge unit and the door system using this hinge unit, it is possible to eliminate pinching of an object when shifting from an open state to a closed state while having a simple structure mainly composed of a support body, a gear, and a connecting body. It is possible to reduce the dead space in the open state and further improve the partition performance by improving the sealing performance in the closed state.
[0013]
In the folding door type door system using this hinge unit, the door can be opened even if it is pushed or pulled by placing the rotation center of the door on the center line in the thickness direction of the panel. It has the advantage that the door can be opened to both the outside and the outdoor side. Therefore, even if a baggage is held in both hands, the door can be pushed 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, it is necessary to push and close the door once again by depositing a part of the body on the protruding end of the folding door. After achieving the intended purpose of passing through the door with both hands closed, it is costly even for a healthy person to close it. For wheelchair consumers, the wheelchair is rotated 180 degrees. In order to change the direction, close the door, and move forward, the wheelchair must be rotated 180 degrees again to change the direction, and the burden is not small. This is particularly difficult in a small place such as a toilet or hallway (originally folding doors are often provided in such a small place). Therefore, it is required that the folding door using this hinge unit be a self-closing type folding door.
[0015]
Moreover, even in a self-closing type folding door, it does not start to return to the original position immediately after being fully opened, but can be closed by applying a slight force when necessary while maintaining the opened state by stopping in the fully opened state. Things may be preferred.
[0016]
On the other hand, for example, the toilet booth doors of public facilities are preferably open so that they can be seen at a glance when they are not in use. In some cases, it is not preferable. In such a case, when not in use, the door can be stopped at a predetermined position between fully open and fully closed, and when used, the door is closed by pushing or pulling the door, and kept closed by latching. Alternatively, it is convenient if the door can be automatically returned to the original predetermined position by locking the thumb turn and releasing the latch after use or unlocking the thumb turn.
[0017]
As such an automatic return hinge, the thing of patent document 3 is conventionally known. This automatic return hinge has a movable cam cylinder rotatably fitted in a pivot fitting that is attached to the door side, and is elastically provided between the end of the sliding cam cylinder opposite the cam surface and the ring cap. The movable cam cylinder and the sliding cam cylinder are fitted so that the sliding cam cylinder always urged in contact with the movable cam cylinder by the large-diameter coil spring can move up and down and rotate integrally with the pivot fitting. A small shaft with a polygonal shaft that is slidably inserted in the axial direction and rotates integrally with the movable cam cylinder above the pivot fitting and between the engagement step of the polygonal shaft and the ring cap. The coil spring is urged into a protruding state, and the tip of the polygon shaft is inserted into a polygon 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]
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 Document 3 automatically moves the door back and forth by sliding a sliding cam cylinder projecting a guide projection that engages with a guide groove provided in the above-mentioned pivot fitting. However, a gap, that is, play is inevitably generated 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 base of the suspension, it expands in proportion to the distance at the end of the door panel.For example, the room does not return to the fully closed state and requires a certain degree of partitioning without locking. Then there are cases where it cannot be overlooked. Conversely, if a door stop is provided, this can be prevented, but it cannot be employed in a free door having a structure that opens to both the outdoor side and the indoor side.
[0022]
The present invention has been made in consideration of the above-described circumstances, and relates to a folding door system using a hinge unit, and includes a door system having an automatic return hinge that accurately returns to a door return position set at an arbitrary position. The purpose is to provide.
[0023]
Another object of the present invention is to provide a door system provided with a mechanism that can hold the fully open state in the door system.
[0024]
[Means for Solving the Problems]
In order to solve the above-described problem, an 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. A double chevron cam portion inserted into the housing, a return spring portion inserted into the lower portion and fixed at the lower end thereof, and a multi-stage polygonal shaft for continuous insertion of both, the cam portion being An upper cam that is inserted into the housing and rotated integrally with the housing that rotates as the door is opened and closed, and an outer cam that is vertically movable and non-rotatable on the multi-stage polygon shaft. The multistage polygonal shaft is provided with a cylindrical head on the door frame side that protrudes from the upper portion of the housing. The lower cam is cam-coupled to the cam and slides downward as the upper cam rotates. Fixed to the shaft adjustment bracket at any rotational position. Than it is.
[0025]
Next, in order to solve the above-described problem, the multistage polygon shaft of the automatic return hinge according to claim 2 has a cross section formed in a hexagonal shape.
[0026]
In order to solve the above-described problem, a door system according to a third aspect suspends a panel body slidably by a suspension rail provided along the width direction of the door opening at the lower part of the upper frame of the door frame. Provided with a support mechanism composed of a suspension wheel and an upper pivot and a lower pivot. Two panel bodies are brought into contact with each other along the longitudinal direction of adjacent panel bodies and rotated with respect to the other panel body. In a door system that includes a hinge unit that is hinged to be movable and opens and closes both panel bodies in a folding door form, the upper pivot includes an automatic return hinge mechanism in a housing attached to the door side. Is provided with a double chevron cam part inserted into the upper part, a return spring part inserted into the lower part and fixed at the lower end thereof, and a multi-stage polygon shaft for continuous insertion and insertion of both, And an upper cam provided integrally with the casing that rotates with the opening and closing of the door, and the multi-stage polygonal shaft, and can be moved up and down and non-rotatably. 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 that protrudes from the upper portion of the housing. Is fixed at an arbitrary rotational position to a shaft adjustment fitting provided on the.
[0027]
In order to solve the above-described problem, the door system according to claim 4 is configured such that a magnet is attached to a position of the suspension rail that contacts the upper pivot side end of the suspension vehicle, and the suspension vehicle is magnetized. The door is parked by the attractive force of and the door is held in the fully open position.
[0028]
DETAILED DESCRIPTION OF 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 the door system using the hinge unit and the automatic return hinge according to the present embodiment will be described. In the present embodiment, the description will be made with the fully closed time set as the return position.
[0029]
As shown in FIG. 1, the three-sided frame 11 and the floor 12 define an opening OP that forms a room entrance. The three-way frame 11 is formed by integrally forming an upper frame 11u and vertical frames 11s and 11s on both sides thereof. The door system 1 is attached to the inside of the three-way frame 11 so as to be opened and closed.
[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 11 u of the three-way frame 11 has a predetermined region of 2/3 or more in the width direction cut out, and a suspension rail 14 is embedded in the cut portion.
[0032]
In FIG. 1, an upper pivot 15 is fixed in the left end portion of the suspension rail 14, while a lower pivot 16 is embedded on the opposing floor 12 directly below the upper pivot 15. The upper pivot 15 has a pivot structure, and an automatic return hinge 30 housed in the rotary pole 21 connects the folding door 20 to the upper frame 11u so as to be rotatable.
[0033]
On the other hand, a bearing for pivotally supporting the rotary rod 21 with a pivot structure is attached to the lower end surface of the rotary rod 21 so that a pivot shaft standing from the floor surface can be inserted. Yes.
[0034]
The six-wheel suspension wheel 17 is accommodated in the suspension rail 14 as shown in FIGS. 1 and 11, and is arranged so as to be freely movable along the longitudinal direction thereof. A pivotable axle 17a is suspended from the six-wheel suspension wheel 17. The axle 17a is fixed at 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 so that the folding door 20 is perpendicular to the three-way frame body 11 so that the passable width is maximized when the door is fully opened. The six-wheel suspension wheel 17 has at least a strength capable of supporting the suspension load of the panel body 20b. As the door is opened and closed, the six-wheel suspension vehicle 17 also rolls and moves in the suspension rail 14 to allow the sliding motion of the panel body 20b, and the rotation of the axle 17a allows the swinging motion of the panel body 20b. . The side surface of the suspension rail 14 is hidden by the cover 19. Further, the six-wheel suspension vehicle 17 does not have to be six wheels as long as it rolls smoothly in the suspension rail and does not shake left and right.
[0035]
In the door system 1, the folding door 20 constitutes a main part of an opening / closing body that opens and closes the opening OP, and two panel bodies 20a, 20b and a hinge unit 22 provided between the panel bodies 20a, 20b. And a rotating column 21 as a column portion fixed to one side of the panel body 20a. Here, the main part of each of the panel bodies 20a and 20b is made of a wooden material and has a predetermined thickness and size.
[0036]
The rotary pole 21 has a function of supporting the panel body 20a by the upper pivot 15 and the lower pivot 16 so as to be swingable. 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 both loads are received via the hinge unit 22. It is also transmitted to other panels.
[0037]
As shown in FIGS. 1 to 3, the hinge unit 22 includes two support columns 23 a and 23 b. Each of the column bodies 23a and 23b is formed by forming a material made of aluminum into a bar shape or a column shape having a substantially semicircular cross section, and the length thereof substantially matches the height of the panel bodies 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 the upper and lower end faces of the column bodies 23a and 23b via fixed shafts 24a and 24b, respectively. Each of the spur gears 25a, 25b is made of resin, for example, and has a thin axial thickness of, for example, about 1 cm. Both the spur gears 25a and 25b can be engaged with each other, and the upper end (or lower end) side of the spur gears 25a and 25b is connected to each other by a thin plate-like connecting plate 26. Both ends of the connecting plate 26 are rotatably attached to bolts 27a and 27b fixed at the axial center positions of the spur gears 25a and 25b. For this reason, the spur gears 25a and 25b are connected in an engaged state and can freely rotate (rotate) with each other. When the spur gears 25a and 25b are rotated, the column bodies 23a and 23b fixed to the spur gears 25a and 25b are also integrally rotated around the longitudinal central axis. Note that the spur gears 25a and 25b, that is, the support columns 23a and 23b, are not displaced from each other in the vertical direction by the stopper mechanisms of the bolts 27a and 27b.
[0039]
Further, the struts 23a and 23b are set to an extremely narrow interval of about 1 mm by appropriately selecting the diameters of the spur gears 25a and 25b, the tooth height, and the like.
[0040]
The door system 1 of the present embodiment is configured and functions as described above. For this reason, when opening a door, what is necessary is just to push the side edge part side opposite to the rotating column 21 of the panel body 20b with a hand. As a result, as shown in FIG. 4, the panel bodies 20a and 20b of the folding door 20 are folded in half around the hinge unit 22 while swinging and sliding to the rotary column 21 side to open the door (same figure). Virtual line I). Thereafter, the door automatically returns along the path indicated by the imaginary line I in FIG.
[0041]
Further, according to the present embodiment of the present invention, as shown in FIG. 4, the door can be opened by pushing the door in the same way to the indoor side and the outdoor side. It is unnecessary. Accordingly, a door knob is not required and there is no projection from the side of the panel body, so that a wider effective passage width can be ensured. However, the door knob is attached to a predetermined position on the outdoor side and the indoor side at a predetermined height position near the side end of the panel body 20b opposite to the rotating column 21 so that the panel body 20b can be opened. Is also possible.
[0042]
The occupied space accompanying the movement of the panel body when opening and closing in this way is smaller than that of a normal swing door. Therefore, it can be easily opened and closed for wheelchair users and the like.
[0043]
Since the centers of the spur gears 25a and 25b coincide with the center position 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 accompanying this opening / closing operation is as shown in FIG. And on the center line Lo of the panel bodies 20a, 20b. As a result, the movement trajectory of the end portions of the panel bodies 20a and 20b at the time of opening and closing is different from the conventional case, and does not protrude outward. 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, the partitioning property can be remarkably improved without adding a door cover or the like that hides the gap. Further, the gap Wo between the panel bodies 20a and 20b in the door open state is almost zero, and there is almost no dead space, so that a wider passage or the like can be secured.
[0045]
The gap between the vertical frames 11s and 11s and the panel bodies 20a and 20b and the gap between the panel bodies 20a and 20b in the door closed state and the gap between the panel bodies 20a and 20b are originally extremely small. The As a result, a much better partitioning property is achieved than in the prior 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 includes an automatic return hinge 30 housed in the rotary pole 21 and a connecting portion 50 that connects the automatic return hinge 30 to the three-way frame 11.
[0047]
FIG. 5 shows the inside of the automatic return hinge 30 when the folding door 20 is in the fully closed state, that is, in the predetermined return position, and FIG. 6 shows the fully opened state in which the folding door 20 is rotated 90 degrees from the predetermined return position. The inside of the automatic return hinge 30 when taking is shown. 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 communication between these in a cylindrical or sleeve-like housing 33 made of metal, for example, cast iron. The hinge body 31 includes a multi-stage polygon shaft 48 to be inserted, and a panel body mounting arm 32 that protrudes horizontally from the top of the hinge body 31 and connects to the upper end of the panel body 20a. The hinge body 31 is fixed to the upper corner of the panel body 20a by the panel body mounting arm 32.
[0049]
The cylindrical casing 33 is formed with the lower portion open, while the top surface is once closed, and then a regular quadrangular prism-shaped convex portion protruding from the top of the upper cam 61 of the double angle cam portion 60. A square hole 34 for fitting and inserting 64 is formed. The panel body mounting arm 32 is provided with a plurality of screw holes 35 for mounting the panel body 20a.
[0050]
As shown in FIGS. 6 and 7, the double angle cam portion 60 is composed of an upper cam 61 and a lower cam 65, and has double cam surfaces on the inner peripheral side and the outer peripheral side to constitute a double cam mechanism. Yes.
[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. Further, for example, a regular quadrangular prism-shaped convex portion 64 is formed on the upper end surface of the upper cam 61, and the convex portion 64 is fitted into a regular rectangular hole 34 formed in the top of the cylindrical housing 33. The upper cam 61 is rotated integrally with the cylindrical casing 33.
[0052]
The cylindrical outer peripheral layer 62 of the upper cam 61 has an inclined cam surface 70 formed at the lower end surface, and the inclined cam surface 70 is formed at the lower end surface of the inner peripheral layer 63 formed inside the cylindrical outer peripheral layer 62. , 70 is formed in an inclined cam surface 71 that is inclined in a direction intersecting with. A circular center hole 72 is formed as a shaft hole on the shaft core side of the upper cam 61. The circular center hole 72 has a diameter larger than the outer diameter of the multi-stage polygon shaft so that the circular center hole 72 is rotatably inserted without contacting the multi-stage polygon shaft 48. The inclined cam surfaces 70, 70 of the outer peripheral layer 62 are symmetrical and generally have a gentle cam surface that is distributed from the lowest bottom 73 to the left and right and continues to the highest top 74 in a linear gradient. The bottom 73 has a straight boundary, and the top 74 has a groove 75 formed downward. In addition, the inclined cam surfaces 71 and 71 of the inner peripheral layer 63 are also symmetrical, and a gentle cam surface that is distributed from the lowest bottom 76 to the left and right and continues to the highest top 77 is formed in a linear gradient. The bottom 76 has a straight boundary, and a groove 78 is formed in the top 77 downward. Here, the grooves 75 and 78 of the top portions 74 and 77 are provided for clearance to prevent the lower cam 65 from being affected by product accuracy, deformation, wear, and the like.
[0053]
Similarly, the lower cam 65 has a concentric two-layer structure of an outer peripheral layer and an inner peripheral layer, and a lower end surface is formed in a flat surface 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 polygon shaft 48 is inserted is integrally formed. Here, the lower cam 65 is integrally rotated with the multistage polygon shaft 48, and even if the upper cam 61 rotates as the door is opened and closed, the rotation is restrained and slides up and down along the multistage polygon shaft 48. Therefore, the center hole 82 is slidably engaged with the multistage polygonal shaft 48. The inclined cam surfaces 80, 80 of the outer peripheral layer 66 are symmetrical, and a gentle cam surface that is distributed from the highest top 83 to the left and right and continues to the lowest bottom 84 is usually formed in a linear gradient, and the top 83 has a straight ridgeline. An upward groove 85 is formed in the bottom 84. In addition, the inclined cam surfaces 71 and 71 of the inner circumferential layer are symmetrical and a gentle cam surface that is distributed from the highest top 86 to the left and right and continues to the lowest bottom 87 is generally formed in a linear gradient, and the top 86 is a straight line. An upward groove 88 is formed in the bottom portion 87. The inclined cam surfaces 80 and 80 of the outer peripheral layer 66 and the inclined cam surfaces 81 and 81 of the inner peripheral layer 67 are arranged with a phase difference of 180 degrees so that the apexes face each other. Here, the grooves 85 and 88 of the bottom portions 84 and 87 are provided for clearance 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 angle cam portion 60. The return spring portion 40 includes a spring receiver upper fixing ring 41, a coil spring 43, and a spring receiver lower fixing ring 44.
[0056]
The spring support upper part fixing ring 41 includes a base part 41a and a projecting part 41b projecting downward from the base part 41a, and has a diameter that circumscribes the shaft core part with a margin to be loosely inserted into the multistage polygon shaft 48. The circular center hole 42 is formed, 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 protrusion 41b is inserted into the inside of the coil spring 43, prevents the coil spring 43 from moving to the left and right and contacts the inner wall of the cylindrical housing 33, and pressure from the lower cam is applied to the spring receiving portion. It is intended to be transmitted right below.
[0057]
The spring receiver lower fixing ring 44 includes a base portion 44a and a protrusion 44b protruding upward from the base portion 44a, and constitutes a spring receiver 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 multistage polygon shaft 48 is loosely inserted. The bottom surface of the spring receiving lower fixing ring 44 is supported by a long nut 46 and a nut 47 threadedly engaged with the bolt portion 48d of the multi-stage polygon shaft 48, and is restrained from moving downward to secure the restoring force of the coil spring 43. To do. At the same time, the repulsive force of the coil spring 43 can be adjusted by adjusting the positions of the long nut 46 and the nut 47. The bottom surface of the base 44a directly forms the bottom surface of the automatic return hinge body 31. The protruding portion 44 b is inserted into the coil spring 43 and prevents the coil spring 43 from moving to the 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 has a lower cam 65 that descends following the upper cam 61 that rotates integrally with the folding door 20. The spring is biased in the direction of pushing back using the restoring force. Due to 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 spring-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 part 48a, a chamfered polygonal part 48b, a polygonal part 48c and a bolt part 48d from the top, and a screw hole 49 for attaching the shaft adjusting bracket 51 with a screw at the upper end. It is installed. And since this axis | shaft adjustment metal fitting 51 is fixed to the suspension rail 14 via an attachment metal fitting, the multistage polygonal axis | shaft 48 does not rotate even if the folding door 20 is opened and closed.
[0060]
The circular portion 48 a located at the uppermost portion of the multistage polygonal shaft 48 is loosely inserted into the bearing hole 52 of the shaft adjusting fitting 51, and is fixed using a hexagon socket set screw 53. As described above, since the portion loosely inserted into the bearing hole 52 is circular, it is possible to freely rotate the multistage polygonal shaft 48 in the bearing hole 52 and set the return position to an arbitrary position. .
[0061]
The chamfered polygonal part 48b located immediately below the circular part 48a has a polygonal cross section, but the corners of the polygon are chamfered in order to fit the bearing part 54. Since the diameter of the center hole 58 of the bearing portion 54 is larger than the circular portion 48 a and smaller than the diameter of the circumscribed circle circumscribing the polygonal portion 48 c, the multistage polygon shaft 48 is centered on the bearing portion 54. When inserted through the hole 58, the circular portion 48a and the chamfered polygonal portion 48b can be inserted, but cannot be inserted into the polygonal portion 48c positioned below. Therefore, attachment work becomes easy and efficiency is improved.
[0062]
The polygonal part 48c below the chamfered polygonal part 48b constitutes a main part of the multi-stage polygonal shaft 48. Specifically, the folding door 20 and the upper cam 61 of the angled cam part 60 rotate. Even if it moves, this multi-stage polygon shaft 48 is integrated with the lower cam 65 to prevent the rotation of the lower cam 65, and still slides the lower cam 65 pushed by the rotating upper cam 61 up and down. It is something to move. Therefore, for example, when the polygonal portion 48c has an octagonal cross-sectional shape, the force of the upper cam 61 to be rotated becomes stronger, and slippage easily occurs between the center hole 82 of the lower cam 65 and the surface of the multistage polygon shaft 48. The lower cam 65 may rotate. On the other hand, when the polygonal portion 48c has a quadrangular cross-sectional shape, the vertical sliding between the center hole 82 of the lower cam and the surface of the multistage polygonal shaft 48 becomes worse, and the sliding becomes difficult to go smoothly. Therefore, the cross-sectional area of the polygonal portion 48c is preferably around the hexagonal shape among the polygons. For this purpose, the size of the central hole 82 of the lower cam 65 should not be in close contact with the polygonal portion 48c of the multistage polygonal shaft 48, and it must not be loose.
[0063]
The bolt part 48d located at the lowermost part is formed in a bar shape thinner than the polygonal part 48c etc., and the screw is screwed so that the long nut 46 and the nut 47 are screwed together at the end inserted in the return spring part 40. It is engraved.
[0064]
The double chevron cam portion 60, the return spring portion 40, and the multi-stage polygon shaft 48 that communicates and penetrates these are configured in this way. Therefore, in order to incorporate this into the housing 33, from below the housing 33, The upper cam 61, the lower cam 65, the spring receiving upper fixing ring 41, the coil spring 43, and the spring receiving lower fixing ring 44 are inserted in this order, and the multistage polygonal shaft 48 is inserted through the upper cam 61 to project the 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 then screwed so that the bolt portion 48d of the multi-stage polygon shaft 48 is not loosened by the double nut of the long nut 46 and the nut 47. Combine. Thus, the upper cam 61 is fitted in the housing 33 so as to be rotatable in accordance with the housing 33, and the lower cam 65 is slidable in the vertical direction while being prevented from being rotated by the multistage polygon shaft 48. Fitted into the body 33, pressure is applied to the coil spring 43, and the repulsive force biases the lower cam back, and the force rotates in the direction opposite to the direction in which the upper cam 61 is rotated. The folding door 20 is returned to the original position by applying a force to perform.
[0065]
Next, the connecting portion 50 that connects 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 adjustment fitting 51 that sets the return position of the folding door 20, a bearing portion 54 that is sandwiched between the shaft adjustment fitting 51 and the upper portion of the housing 33 of the automatic return hinge 30, and the shaft adjustment fitting 51. The mounting bracket 90 is 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 through which the circular portion 48 a of the multistage polygonal shaft 48 is inserted in the vertical direction at a position biased to one short side on the plane. A hole 52 is formed. A screw hole 59 is drilled from the three side surfaces close to the bearing hole 52 to the center of the bearing hole 52. A hexagon socket set screw 53 is screwed into the screw hole 59, and the circular portion 48a of the inserted multi-stage polygon 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]
The shaft adjusting bracket 51 is hung at a position that is biased to the opposite side of the bearing hole 52 through which the remaining multi-sided polygon shaft 48 through which the two long sides are inserted out of the side surfaces of the shaft adjusting bracket 51. A mounting hole 90 to be attached to is formed. As shown in FIG. 9, an angle-shaped mounting bracket 91 is attached using a screw 92, and the mounting rail 91 is bolted to an angle-shaped mounting auxiliary bracket 93 attached to the suspension rail 14, thereby hanging the rail. 14 and fixed. The mounting height in this case 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 adjusting bracket 51 and the multi-stage polygon shaft 48 fixed thereto are stationary at a fixed position without rotating even when the folding door 20 is opened and closed. The place which looked at the connection part from another angle is shown in FIG.
[0068]
The bearing portion 54 is sandwiched between the non-rotating shaft adjusting bracket 51 and the top portion of the housing 33 of the automatic return hinge 30 that rotates as the folding door 20 is opened and closed, and the housing 33 of the automatic return hinge 30. Is composed of upper and lower washers 55 and 57 and a thrust bearing 56 sandwiched between them.
[0069]
As described above, the upper pivot 15 of the door system 1 according to the present embodiment includes the shaft adjustment fitting 51 that does not rotate, the multistage polygon shaft 48 and the lower cam 65, and the automatic return hinge that rotates as the folding door 20 is opened and closed. The coil spring 43 of the return spring portion 40 is compressed by the interaction between the housing 33 and the upper cam 61, and the folding door 20 is automatically returned to the original position by the restoring force of the coil spring 43. It is comprised so that it may return 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 panel body 20b is pushed and the folding door 20 is opened, the panel body mounting arm 32 fixed to the panel body 20a rotates. Due to the rotation of the panel body mounting arm 32, the casing 33 of the automatic return hinge 30 rotates in the same direction by the same angle. The upper cam 61 of the mountain-shaped cam part 60 in which the convex part 64 of the top part is fitted in the square hole 34 drilled in the top part of the housing 33 is rotated in the same manner.
[0072]
On the other hand, the lower cam 65 of the angle cam portion 60 is fitted on the multistage polygonal shaft 48 so as to be vertically slidable and non-rotatable, and the multistage polygonal shaft 48 is fixed to the shaft adjusting bracket 51. Since the shaft adjusting bracket 51 is fixed to the suspension rail 14 via the mounting bracket 91 or the like, it does not rotate. Therefore, the upper cam 61 applies pressure to the lower cam 65 via an inclined cam surface that contacts the lower cam 65 by rotating. Here, the lower cam 65 is restricted in rotational movement and cannot rotate, and 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. The lower portion of the return spring portion 40 is fixed by a nut 57 or the like. Therefore, the coil spring 43 contracts and presses the lower part of the lower cam 65.
[0074]
Accordingly, when the force pushing the panel body 20b is released, the energy stored in the coil spring 43 of the return spring portion 40 is released, and the lower side via the spring receiving upper fixing ring 41 is restored by the restoring force of the coil spring 43. The cam 65 is pushed upward. The push-up force of the lower cam 65 acts as a cam, contrary to the case where the folding door 20 is opened, and a force that restores the upper cam 61 based on the inclined cam surface of the upper cam 61 acts.
[0075]
Since the upper cam 61 is fixed at the top, it rotates in the opposite direction to the case of opening the folding door 20 by the double cam action of the inclined cam surface that contacts the lower cam 65, that is, in the closing direction, and returns to the original position. I will try.
[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 so as to be engaged without being displaced. For example, the bottom 73 of the outer peripheral layer of the upper cam 61 is pointed concavely, and the top 83 of the outer peripheral layer of the lower cam 65 is pointed convexly.
[0077]
And when it exists in a predetermined return position, since both engage and are urged | biased by the coil spring 43, as shown in FIG. 5, the movement of the lower cam 65 is restrained and an occlusion does not shift | deviate. When the panel body is pushed or pulled from this state, the upper cam 61 and the lower cam 65 slide along the inclined cam surfaces 70 and 80 due to the rotation of the upper cam 61, and as shown in FIG. The bottom portion 73 of the layer and the top portion 83 of the outer peripheral layer of the lower cam 65 are separated from each other.
[0078]
Here, when the force that pushes or pulls the panel body 20 b is released, the upper cam 61 rotates in the reverse direction due to the restoring force of the coil spring 43, and the upper cam 61 and the lower cam 65 follow 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 the original bitten position and do not go too far. That is, even if acceleration is excessive due to the large return force at first, this force eventually attenuates and depends on the strength of the spring. Returns smoothly and accurately.
[0079]
Thereby, according to the door system 1 which concerns on this Embodiment, the self-closing door which does not seem to be able to see the inside at the time of non-use can be provided also in places like the toilet of a common house, for example.
[0080]
Also, for example, when there are several toilet booths lined up like toilets in public facilities, even when the doors of the toilet booth are not used, the doors are stopped at a predetermined position between fully open and fully closed. According to the door system according to the present embodiment, the doors of unused toilet booths are kept open at the same angle without variation, and an orderly impression can be given.
[0081]
Next, a second embodiment of the door system using the automatic return hinge and 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 it includes a mechanism that can maintain a fully opened state, and other configurations are the same as those of the first embodiment. It is substantially the same as the embodiment, and the same reference numerals are given and description thereof is omitted.
[0083]
FIG. 11 shows a 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 open state.
[0084]
As described with reference to FIG. 4, according to the present embodiment, the gap Wo between the panel bodies 20a and 20b can be made sufficiently small when fully opened. 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 vehicle 17 cannot slide in the suspension rail 14 to the vertical frame 11s side any more. The six-wheel suspension vehicle 17 includes a vehicle 17b that is vertically arranged in two rows in the front and rear, a vehicle 17c that is horizontally attached to a lower portion thereof, and a chassis 17d that integrally couples these vehicles. Among these, the vertical and horizontal wheels 17b and 17c are made of a material such as plastic, and the chassis 17d is made of a magnetic body having a vertical cross section formed in a U-shape, for example.
[0085]
Here, if the force applied to the panel body 20a of the folding door 20 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 when working around the door. In such a case, if the magnet 95 is attached to the suspension rail 14 at a position in contact with the end portion on the upper pivot 15 side of the six-wheel suspension wheel 17 at the door fully open position via the magnet mounting bracket 96, it is simple. It is possible to maintain the fully open state. Further, since the magnet 95 is housed in the suspension rail 14, it cannot be seen from the outside, and the aesthetic appearance is not impaired.
[0086]
The automatic return hinge 30 according to the present invention has been developed for the purpose of automatically and accurately returning the folding door type door system including the hinge unit 22 to the original position. It is most suitable to be used for folding doors with 22 but can also be used in other types of hinged doors, for example, single-sided and double-foldable doors in which the panel body opens and closes 180 degrees indoors and outdoors. is there.
[0087]
Even in these cases, the free door provided with the automatic return hinge according to the present invention returns to the original position with high accuracy, and can be used even in a room where partitioning is required. In particular, with the conventional double doors, the two door panels are sometimes not seen in the fully closed position, but are sometimes seen in the disjointed positions. It is not a thing. However, if the automatic return hinge according to the present invention is employed, such inconvenience does not occur.
[0088]
【The invention's effect】
According to the door system using the automatic return hinge according to the present invention, it is possible to provide a door system having an automatic return hinge that accurately returns to the return position of the door set at an arbitrary position.
[0089]
Moreover, as described above, in the door system according to the present invention, it is possible to provide a door system including a mechanism that can hold the fully opened 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 a hinge unit.
FIG. 3 is a plan view of the gear portion of FIG. 2;
FIG. 4 is a diagram showing a trajectory of folding door opening and closing operations.
FIG. 5 is a view showing the inside of an automatic return hinge when a 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 an automatic return hinge.
8A and 8B are diagrams for explaining a double angle cam; FIG. 8A is a plan view of the upper cam, FIG. 8B is a front view thereof, FIG. 8C is a bottom view thereof, and FIGS. f) A plan view, a side view, and a bottom view, respectively, of the lower cam.
FIG. 9 is a plan sectional view of a bearing adjusting bracket.
FIG. 10 is a cross-sectional view illustrating a connecting portion.
FIG. 11 is a diagram 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 whole hinge.
[Explanation of symbols]
1, 2 door system
14 Suspension rail
15 Upper pivot
16 Lower pivot
17 6-wheel suspension car
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
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 a housing attached to the door side. The automatic return hinge mechanism is a double chevron cam portion that is inserted into the housing and a return portion that is inserted into the lower portion and the lower end is fixed. A spring portion and a multi-stage polygonal shaft that allows both of them to be fitted and inserted, and the cam portion is fitted and inserted into the housing, and the upper portion is provided integrally with the housing that rotates as the door is opened and closed. The multistage multi-stage polygon shaft comprises a cam and a lower cam that is externally fitted on the multistage polygon shaft so as to be vertically movable and non-rotatable, and is cam-coupled to the upper cam and slides downward as the upper cam rotates. The square shaft is an automatic return hinge characterized in that a cylindrical head projecting from the upper portion of the housing is fixed to a shaft adjustment fitting provided on the door frame side at an arbitrary rotational position. 2. The automatic return hinge according to claim 1, wherein the multi-stage polygon shaft has a hexagonal cross section. Provided with a support mechanism consisting of a suspension car that slidably suspends the panel body with a suspension rail provided along the width direction of the door opening at the lower part of the upper frame on the door frame side, and an upper pivot and a lower pivot. The panel body has a hinge unit that abuts adjacent side end surfaces along each other along the longitudinal direction and is hinged to the other panel body so as to be pivotable with respect to the other panel body. In the door system, the upper pivot includes an automatic return hinge mechanism in a housing attached to the door side, and the hinge mechanism is inserted into the upper portion of the double chevron cam portion and is inserted into the lower portion thereof. A return spring portion having a lower end fixed thereto, and a multi-stage polygon shaft that allows both of them to be fitted and inserted, wherein the cam portion is fitted into the housing and rotates in accordance with opening and closing of the door; Times An upper cam provided integrally therewith, and a lower cam that is fitted to the upper cam so as to be vertically movable and non-rotatable on the multi-stage polygon shaft, and is slid downward as the upper cam rotates. The multi-stage polygonal shaft comprises a cylindrical head projecting from the upper part of the housing and fixed to an axis adjustment fitting provided on the door frame side at an arbitrary rotational position. . When the door is in a fully open state, a magnet is attached to a position in the suspension rail that comes into contact with the upper pivot side end of the suspension vehicle, the suspension vehicle is parked by the attractive force of the magnet, and the door is in the fully open position. The door system according to claim 3, wherein the door system is held.

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