JP2016094740A - Pivot hinge with closing mechanism - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pivot hinge with a closing mechanism for a door that offers a low and relatively uniform closing force in a range covering up to a prescribed opening angle, and strong closing force in a final closing stage.SOLUTION: A closing mechanism part is formed by rotatably fitting an integrated columnar cam and a shaft center at a tip side of a frame-side case, and energizing a tip protrusion of a push-in bit onto an outer peripheral surface of the columnar cam with a spring member. The columnar cam has an inclined surface that drastically changes a distance between the shaft center and the outer peripheral surface in a narrow opening angle range, and a curved surface continuing from the inclined surface that gradually increases the distance between the shaft center and the outer peripheral surface per unit opening angle. The columnar cam rotates when a door is opened, and the tip protrusion of the push-in bit moves by being pushed by the inclined surface and the curved surface and while largely deflecting the spring member. When left in a prescribed opening range, the door slowly starts closing, and even greater closing force is obtained in a final closing stage.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a pivot hinge having a door closing mechanism.

  As a conventional door pivot hinge with a closing mechanism, a powerful torsion spring as reported in Japanese Patent Application Laid-Open No. 2002-266551 is wound in the axial direction, and a number of complicated clutches and rings are used. Reported in Japanese Patent Laid-Open No. 2000-17940 is a structure that brakes the operation at the time of closing, a structure that uses oil pressure such that the sealed oil moves through two orifices that are often used for floor hinges, etc. A cylindrical cam with a continuous inclined surface is arranged around the shaft, and the door is lifted by the inclination of each cylindrical cam surface by the opening operation of the door, and then closed by its own weight. A gravity hinge is generally used.

  However, the former two points in the above-mentioned prior art are the basic operations in which the torsion spring is wound in the axial direction, and the closing force of the door is obtained by the urging force of the torsion spring. Therefore, the urging force increases as the door is greatly opened, and the urging force decreases when the door is opened only slightly. And in order to be able to carry out a reliable closing operation even from the stage where it is opened only slightly, it is necessary to have a certain level of closing force even at the final stage of closing. Then, when it is in a large open state, a very strong force is applied and acceleration is also applied, so that it closes rapidly, resulting in a closing condition that hits the door with a bang and impact. Therefore, the entire operation is braked by using various speed reduction mechanisms so as not to be suddenly closed at the time of closing while maintaining a state of being always biased by a very strong torsion spring. Therefore, the mechanism tends to be complicated and exaggerated in order to forcibly brake a large force. Then, the operation when opening the door tends to be heavy, and it may be inferior in operability for a disabled person or an elderly person who pushes the weight open.

  Moreover, since the gravity hinge is configured to be closed by a continuous inclined surface around the shaft using the dead weight of the door, the closing force can be set to only a necessary angle. However, the biggest feature of this mechanism is the structure that converts the dead weight of the door into a closing force, so it is indispensable to lift the door itself when it is opened. As a result, the upper end of the door approaches the upper frame along with the opening action. It will be. Therefore, although it is widespread in toilet doors where the gap between the upper frame and the door upper surface is relatively large, it cannot be used in indoor doors where the gap is small as a storage, and it is hardly spread.

  In addition, the opening / closing angle of the door during general traffic is from 70 degrees to less than 80 degrees, but it is a necessary condition that a normal indoor door can be opened up to 180 degrees. If a torsion spring is adapted to an opening of 180 degrees, the problem is that the force at the closing stage becomes increasingly large. Therefore, the biasing force in the closing direction is sufficient only from the vicinity of the 85 ° position, and it is desirable that the biasing force does not increase in the opening operation up to 180 ° thereafter.

Furthermore, indoor doors are usually opened and held at an opening angle of about 80 to 85 degrees, and an operation for stopping at a position near this is also required. it can also be stopped at any angular position for long if the closing mechanism is not. However, in the configuration using the above-mentioned torsion spring, a force is always applied to close, and since it has a considerably large closing force when placed near the 90 degree position, in order to stop at this position In addition, a separate complicated mechanism must be used to add a structure for overcoming and holding the force to be closed.
JP 2002-266551 A JP 2000-17940

  The present invention has been made to solve the above-mentioned problems, and is based on the premise that it can be formed with a simple and compact configuration without using a complicated and large-scale mechanism such as hydraulic pressure, and a closing force from a predetermined angle range. Can be implemented with a relatively small force that is slightly higher than the urging force required to rotate the door, and has a large closing force at the final closing stage to enable a more reliable closing operation. An object of the present invention is to propose a pivot hinge with a closing mechanism that can be opened with a light operation. Further, the following object is to have a mechanism capable of adjusting the overall closing force after construction.

  In the present invention, the following technical means are provided to solve the above problems. First, the pivot hinge according to the present invention is arranged on the upper and lower sides of the door suspending side, and includes a door side pivot and a frame side pivot. First, a frame side base and a frame side lid are provided, and a frame side case is formed so that a rectangular space with a certain thickness is formed in a state where both are overlapped. Next, the columnar cam and the shaft center are integrally mounted at the tip side position in the space of the frame side case so as to be rotatable, and the tip protrusion of the push-in bit is urged by the spring member on the outer peripheral surface of the columnar cam. In this state, they are brought into contact with each other to form a closing mechanism portion, which is arranged in the frame side case to constitute a frame side pivot. Further, it is preferable to provide a spring force adjusting member and a spring force adjusting screw on the frame side case so that the biasing force of the spring member can be adjusted.

  Here, the columnar cam has a columnar shape with the same cross section and is long in the vertical direction, has a shaft insertion hole at the center, and its outer peripheral surface has a narrow opening angle from the center of the shaft to the outer peripheral surface. A curved surface that is set so that the distance from the center of the shaft center to the outer peripheral surface gradually increases with respect to the inclined surface that changes extremely in the range, and the same unit opening angle that follows it, and the curved surface after that And is formed from. And the curved surface is good to leave the door in any open position, and then continue to the position where you want to obtain the closing action, then the shape of the curved surface is arbitrary, stop the door in the position as it is If you want to make the curved surface arc-shaped from the center of the axis, and if you want to set it to automatically open up to 180 degrees, the distance from the center of the axis to the outer peripheral surface gradually increases. It is better to form a curved surface so as to decrease. Then, the shaft center having a different tip is inserted into the shaft insertion hole and integrated.

  Next, the upper and lower frame-side pivots are mounted in advance on the frame body, and the door-side pivot having the shaft portion fitting hole or the shaft portion fitting groove is mounted on the upper and lower sides of the door. Then, the lower part of the shaft part fitting hole of the door side pivot and the lower part of the axis part of the lower frame side pivot are formed so as to be fitted in a state in which both do not rattle and do not rotate together. The lower door-side pivot is fitted into the frame-side pivot, and then the upper door-side pivot is fitted into the upper frame-side pivot using the upper shaft, and the door is suspended from the frame body. Then, the door side pivot is rotated by the door opening / closing operation, and the columnar cam is rotated together with the axis of the frame side pivot. Here, it is arbitrary whether the frame side pivot having the closing mechanism portion is arranged only on one of the upper part and the lower part, or both on the upper and lower sides. Of course, the closing force of the door as a whole is greater when it is arranged on both sides.

  In the operation of the push-in bit and the columnar cam, when the door is closed, the tip protrusion of the push-in bit is in contact with the inclined surface of the columnar cam, and the columnar cam rotates during the initial opening stage of the door. Curved shape in which the tip protrusion of the push-in bit is pushed by the inclined surface and moves while greatly bending the spring member, and the distance from the center of the shaft center to the outer peripheral surface gradually increases when the door is subsequently opened. The spring member is gradually bent while contacting the surface.

  Also, if the curved surface is set up to a position where the door opening angle is about 85 degrees, the spring member has the largest deflection at that position, so a large force is exerted against the tangential inclination direction of the curved surface. If left unattended, the door will begin to close. And since the force of a spring member becomes weak little by little as the amount of bending decreases, it is good to adjust the inclination of the tangent of a curved surface so that closing force may not become extremely small. Furthermore, if the amount of change in the distance from the center of the axis on the inclined surface is set so as to increase rapidly, the closing force can be maximized in this final closing stage. In addition, it is better that the difference in force between the initial deflection and maximum deflection of the spring member is as small as possible, and the spring member is placed in the frame side case with a relatively long free compression spring already bent. From this state, it is preferable to set so that the fixed distance is further compressed by the rotation operation of the columnar cam.

  Here, as the closing operation after leaving the door open to an arbitrary angle, if the closing force in that state is slightly stronger than the frictional resistance between the upper and lower pivot hinges, it will close immediately. The operation will start. Accordingly, by appropriately setting the shape of the curved surface and the strength of the spring member, the closing force when stopped within a predetermined opening angle range is made as uniform as possible with a force that barely closes the door. It is good to set to. Then, a very slow closing operation is started regardless of the position at which it is stopped. And since the inclined surface that is continuous with the curved surface at the final stage of closing is set so that the distance from the center of the axis becomes abruptly smaller, a larger closing force can be obtained from this, and the final latching is applied. It is possible to reliably close even in the closed position.

  Further, assuming that the angle at which the door is opened when a person passes is about 75 degrees, it is considered necessary to have a function capable of stopping and holding the door as it is when the door is opened larger than 85 degrees. As a means for this, it is preferable to provide a concave groove portion at a position where the tip of the pushing bit is in contact with the outer peripheral surface of the columnar cam when the door opening angle is near 85 degrees. Then, when the tip protrusion of the pushing bit enters the groove portion provided at this position of the columnar cam, it is possible to obtain a stop operation with a click feeling. In the case of 90 degree open storage, the door can be stopped and held in front of the wall surface. Further, if a groove is formed at a position where the door is opened about 175 degrees, it can be stopped and held in front of the wall surface in the same manner that it can be opened 180 degrees.

  In addition, the force required to close the door varies depending on the weight and size of the door, and the friction force when the pivot hinge itself opens and closes may change over many years. It is necessary and important to be able to adjust. Therefore, a spring force adjusting member having an internal thread portion is provided at the end of the spring member that urges the pushing bit in the frame side case. Then, the spring force adjusting screw is assembled to the frame side case with the head idling, and the male screw portion is screwed into the female screw portion of the spring force adjusting member. Then, since the spring force adjusting member moves by turning the spring force adjusting screw, the initial deflection of the spring member can be adjusted, and the closing force of the door can be adjusted.

  Further, with the above configuration alone, there remains a problem that, in addition to the closing force by the closing mechanism of the pivot hinge itself, a phenomenon in which the closing speed is likely to occur due to a manual closing operation or a wind tilt is likely to occur. Therefore, with regard to this point, oil is sealed inside with a straight cylinder type on one blade, a large load is generated during high-speed immersing operation when the tip of the retracting pin is pushed, and small during low-speed immersing operation. It is preferable that a damper having a configuration that generates only a load be mounted on the door bottom surface and arranged so that the tip of the retracting pin comes into contact with the attachment surface of the frame side pivot or the inner surface of the vertical frame at the final stage of closing the door.

  This means can be adopted because it has the maximum closing force in the final stage of closing described above, and even if it is closed at a low speed, it will not stop due to the force of the damper in the final stage of closing. Furthermore, it is preferable to set the closing force of the door so that the operation of slowly closing the door can be obtained. As a result, even in a closed state at a relatively high speed, a large load due to the characteristics of the damper is obtained, and a certain amount of braking operation can be performed. As a result, even if the closing speed is slightly increased, it is possible to realize an operation of slowly closing to the final stage after deceleration by the damper.

  A frame-side pivot having a closing mechanism in which a push-in bit, a plurality of spring members, a columnar cam integrated with a shaft center, and a spring force adjusting member are inserted in the frame-side case, and a door-side pivot having an extremely simple shape It has a simple structure, is excellent in design, has a small number of parts, and can be provided at low cost. In addition, a hydraulic mechanism or the like is not used for the closing mechanism, which is excellent in durability and has no risk of oil leakage or the like. Then, after the door is released, the closing operation is started at a low speed that can be almost automatically closed, and in the final stage of closing, a slightly larger closing force can be obtained to reliably close the door to the end. Become.

  By appropriately setting the shape of the inclined surface and curved surface of the columnar cam and the urging force by the spring member, it is possible to obtain a uniform closing force at any open position, and a state where it is opened from a large open state to a small open state It is possible to obtain almost the same closing operation even from the camera. As a result, it is possible to reduce unnecessary inertial force that accelerates more and more from the largely opened state, and it is possible to obtain a better closing operation. In addition, since the spring force adjusting screw and spring force adjusting member are provided, it is possible to adjust the biasing force of the spring member according to the weight of the door, and it seems that the closing force is insufficient for some reason during long-term use. Even in such a state, the closing force can be adjusted, which is very effective.

  At any opening angle at which the door is desired to be stopped and held, a concave groove is provided on the outer peripheral surface of the columnar cam at that position, so that the tip of the push-in bit is inserted so that a click feels. The door can be stopped and held.

  If a straight cylinder type damper is installed on the door bottom surface of the door, the maximum closing force can be achieved at the final stage of closing. It is possible to obtain the action of slowly closing the door without losing it, and even when the door is closed at a relatively high speed, a large load due to the characteristics of the damper can be obtained, and a certain amount of braking operation can be performed . As a result, the operation of slowly closing to the final stage after deceleration with the damper can be realized.

  Embodiments of a pivot hinge with a closing mechanism according to the present invention will be described below with reference to the drawings. FIG. 1 shows that a frame-side lower pivot a and a door-side lower pivot b of a pivot hinge with a closing mechanism according to the present invention are attached to a door 22 and a frame body 23, and a shaft portion fitting hole 12 of the door-side lower pivot b is formed. It is a perspective view which shows the state which tries to assemble | attach a lower pivot hinge by inserting in the atypical part 13 formed in the front-end | tip of the axial center 3. FIG. FIG. 2 is a top view of attachment of the frame-side lower pivot a incorporating the closing mechanism. Hereinafter, in the embodiment, description will be given in a state where the closing mechanism is arranged on the frame side lower pivot a as mainly shown in FIG. 1 or FIG. First, the frame-side base 1 and the frame-side cover are provided, and the frame-side case 1 is formed so that a rectangular space with a certain thickness is formed in a state where both are overlapped. Then, as shown in FIG. 1, the columnar cam 2 and the shaft center 3 are mounted at the center position of the front end portion in the frame side case 1 so as to be smoothly rotatable with a bush 7 made of resin or the like interposed therebetween. A pusher bit 4 and a plurality of spring members 6 are assembled on the side to constitute a frame-side lower pivot a.

  Here, as shown in FIG. 2, the columnar cam 2 is fixed to the shaft 3 in a non-rotatable state, and a plurality of springs with the tip protrusion 5 of the push-in bit 4 opposed to the outer peripheral surface of the columnar cam 2. The member 6 is energized. Then, the tip of the shaft 3 is cut into a drum shape and formed as the atypical portion 13. Similarly, a drum-shaped shaft fitting hole 12 is also provided at the center of the front end of the door-side lower pivot b, and the bush 7 or the like is fitted in the same manner. Next, as shown in FIG. 2, the frame side base and the end of the frame side lid are bent in the vertical direction in the shape of a plane, and the head of the spring force adjusting screw 15 is sandwiched between the surfaces. The spring force adjusting screw 15 is attached to the case 1 so as to idle. The spring force adjusting member 14 having the female screw portion 16 is disposed at the end opposite to the columnar cam 2 with the spring member 6 interposed therebetween, and the spring force adjusting screw 15 is connected to the female screw portion 16 of the spring force adjusting member 14. Screw together.

  Then, as shown in FIG. 2, the tip protrusion 5 of the push-in bit 4 is pressed against the outer peripheral surface of the columnar cam 2 integrated with the shaft center 3 by a plurality of spring members 6. From this state, the spring force adjusting screw 15 When is turned, the spring force adjusting member 14 moves in a direction in which the spring member 6 is bent, and the urging force of the pushing bit 4 against the columnar cam 2 can be adjusted. Further, as shown in FIG. 2, a decorative cover may be attached to the entire frame-side lower pivot a to improve the design. Then, the door 22 can be suspended from the frame 23 by attaching the door-side lower pivot b to the frame-side lower pivot a from the state shown in FIG. When the door 22 is opened from the suspended state, an operation of rotating the axis 3 of the frame side lower pivot a and the columnar cam 2 together with the door side lower pivot b is obtained.

    Next, FIG. 3 is a top view of the columnar cam 2. The shape of the columnar cam 2 is a columnar shape having an axial insertion hole 17 in the central portion and the same vertical cross section, and the outer peripheral surface is a deep position of the recessed portion 8. Is formed so that the distance from the center of the axial center insertion hole 17 to the outer peripheral surface gradually changes with respect to the same unit opening angle in a state where the inclined surface 9 is formed thereafter. Continues to face 10. Then, the curved surface 10 is formed so that the opening angle from the reference line Y is about 90 degrees, and thereafter, the curved surface 10 is formed on the circumferential surface 11 with a constant distance from the center of the axial insertion hole 17. ing. Further, since the shaft center 3 is inserted into the shaft insertion hole 17 of the columnar cam 2 and integrated, the direction in which both rotate by opening the door 22 is determined. When the door 22 is opened in the state shown in FIG. Set to always rotate counterclockwise. When the door 22 is closed, the tip protrusion 5 of the push-in bit 4 is disposed at a position in contact with the inclined surface 9 of the recessed portion 8, and the columnar cam 2 is shown in FIG. It will rotate in the opposite direction to the watch from this state.

  In the present invention, the shapes of the inclined surface 9 and the curved surface 10 described above are the most important. As shown in FIG. 3, the inclined surface 9 and the curved surface 10 are separated from the center position of the axis 3 by 0 degrees at every equal angle. If the distance from the outer peripheral surface position to the center of the axis 3 is A to J, the length is always J> I> H> G> F> Set so that E> D> C> B> A. Further, in the angle range of the initial stage of opening from C to B to A and the final stage of closing, the outer peripheral surface position is in the vicinity of a position continuous from the curved surface 10 to the inclined surface 9. It is set so that the distance to the center of the axis 3 changes extremely. Then, when the columnar cam 2 is rotated together with the door 22 opened from the closed state of FIG. 2, the position of the tip protrusion 5 of the push-in bit 4 is pushed by the inclined surface 9 and moves greatly in the lateral direction at once, and further continuously. The curved surface 10 is gradually pushed in the lateral direction to move, that is, it leads to a force for compressing the spring member 6 in the entire area until the curved surface 10 is finished.

  FIG. 4 sequentially shows the rotation operation of the columnar cam 2 in the frame side lower pivot a with respect to the opening and closing of the door 22, and the state in which the door 22 is completely closed is FIG. The protrusion 5 is in contact with the vicinity of the position from B to A of the inclined surface 9 of the columnar cam 2 in FIG. When the door 22 is opened from this state, the columnar cam 2 rotates counterclockwise as shown in FIG. 4, and when the door 22 opens 90 degrees, the position shown in FIG. 3 reaches the position J in FIG. 3 while contacting the inclined surface 9 and the curved surface 10. Accordingly, the spring member 6 continues to be compressed during that time, and as a result, the strongest force is applied in the vicinity of FIG.

  When the opening operation of the door 22 is stopped within the range up to the 90-degree opening position to make it free, the tangential direction of the contact point between the tip protrusion 5 and the curved surface 10 due to the biasing force of the spring member 6 at any position. A force for rotating the columnar cam 2 in the clockwise direction is applied with a strength compared to the degree of the inclination, that is, an operation of closing the door 22 is obtained. Further, in order to completely close the door 22, it is preferable to set the columnar cam 2 so as to rotate excessively in the closing direction as shown in FIG. 4A. Even in this state, the spring member 6 is still bent to some extent. The pushing bit 4 is set so as to have a sufficient urging force. Then, it is possible to prevent a problem that the door 22 is not closed due to an installation error during construction. When the door 22 is opened 90 degrees or more, the outer circumferential surface of the columnar cam 2 is the circumferential surface 11 centering on the shaft center 3, so no force is applied in the closing direction. At any position, the door 22 can be stopped at that position. Although not shown, after 90 degrees, instead of the circumferential surface 11, if the distance from the center of the axis 3 to the outer circumferential surface is set to gradually decrease, it will be 180 degrees after opening 90 degrees. It is also possible to obtain the action of trying to release naturally.

  Next, the most ideal condition for this closing operation is that the inertial force is within a range from FIG. 4 (f), which is an open position of about 90 degrees, to FIG. 4 (c), which is an open position of about 15 degrees. In order to reliably start the closing operation of the door 22 even in a non-stop state, a closing force that exceeds a certain amount of friction force that the pivot hinge itself has is generated, and in the final closing stage from around FIG. It is assumed that a stronger closing force is required to obtain a more reliable closing feeling while engaging with the latch lock. However, since the urging force of the spring member 6 itself becomes stronger and weaker in proportion to the degree of compression, the force is inevitably weaker in the vicinity of FIG. Therefore, the shape setting of the inclined surface 9 and the curved surface 10 whose distance increases from A to J in the above-described manner, that is, the change dimension per the same opening angle is small in the range where the deflection of the spring member 6 is large and the urging force is strong. In the range where the bending of the spring member 6 is small and the urging force is weak, it is preferable to set it large. Therefore, if the difference in the distance from the center of the axial center insertion hole 17 per unit angle in FIG. 3 to the outer peripheral surface, that is, the change dimension calculated from, for example, B minus A in FIG. 3 is ideal, J−I <I If it increases in the order of −H <H−G <G−F <F−E <E−D <D−C <C−B <B−A, the biasing force of the spring member 6 is canceled out and relatively uniform. A closing force is obtained. If the change dimension is rapidly increased with the range corresponding to C-B or B-A as the inclined surface 9, a larger closing force can be obtained at the final closing stage where the latch is applied.

  Therefore, also from the above setting, the condition is further improved when the difference in the urging force between the initial deflection and the maximum deflection of the spring member 6 is as small as possible. Therefore, the spring member 6 is disposed in the frame-side case 1 in a state in which a compression spring having a relatively long free length has already been greatly bent after satisfying the durability performance, and from that state, the columnar cam 2 is further rotated by a certain distance. It is good to set to compress. Then, setting the length of the frame side case 1 as large as possible makes it easier to secure a space for inserting the spring member 6 and improves the condition. Therefore, the female screw portion 16 is provided in the frame side case 1 shown in FIG. 5 rather than the spring force adjusting mechanism shown in FIG. 2, and the spring force adjusting screw 15 is screwed in from the outside, and directly via the spring force adjusting member 14. It is assumed that the structure in which the spring member 6 is compressed can effectively use the inside of the frame side case 1.

  Further, assuming that the angle at which the door 22 is opened when a person passes is about 75 degrees, a function that can stop and hold the door 22 as it is when the door 22 is opened larger than 85 degrees or 90 degrees is considered necessary. As the means, as shown in FIG. 6, when the opening angle of the door 22 is in the vicinity of the 90 degree position, a concave shape is formed at the position where the tip protrusion 5 of the pushing bit 4 is in contact with the outer peripheral surface of the columnar cam 2. A groove portion 18 is preferably provided. Then, when the leading end protrusion 5 of the push-in bit 4 enters the groove portion 18 of the columnar cam 2, it is possible to obtain a stop operation with a click feeling. In the case of 90 degree clearance in a corridor or the like, if the groove portion 18 is provided near the 85 degree position, the door 22 can be stopped and held in front of the wall surface. Further, if the groove portions 18 are also formed at positions opened about 180 degrees, it becomes possible to stop and hold the door 22 in a fully opened state, and the position and quantity of these groove portions 18 are arbitrarily set. Is possible.

  Moreover, since the weight of the door 22 is heavy and exceeds 30 kg, it is an absolute condition that the closing force by the closing mechanism is more than a certain level. Therefore, the structure in which the columnar cam 2 as shown in FIG. 1 is pushed and the urging force is applied via the spring member 6 with the bit 4 may be arranged not only on the frame side lower pivot a but also on the upper frame side pivot. As a result, a relatively large closing force can be obtained as a whole. Further, if the outer peripheral surface of the columnar cam 2 is polished smoothly and is subjected to chromium plating or the like having a low frictional resistance, the push bit 4 and the bush 7 are also made of a resin molded product containing a lubricant. Conditions with less loss can be obtained. However, as described above, the size of the frame-side case 1 has a limit unless the position of the shaft center 3 is taken out from the door surface so that it naturally affects the setting of the free length of the spring member 6 described above. Become.

  Therefore, as shown in FIG. 7, a configuration in which a closing mechanism is disposed on the door-side pivot is also possible. In this case, the pusher bit 4 is divided into two parts, a member that moves in parallel with the door 22 and a member that has a tip protrusion 5 and moves at right angles to the door surface, and a slope 19 is provided on both parts to provide a surface pair. It is preferable that the member parallel to the door 22 is set to be relatively long, and the spring member 6 having a long free length is incorporated therein and urged by being greatly compressed. Then, the difference of the urging | biasing force of the spring member 6 by the rotation operation | movement of the columnar cam 2 can be made comparatively small. Then, the urging force of the spring member 6 is converted into a right-angle direction at both slopes 19 so that the tip protrusion 5 can push the outer peripheral surface of the columnar cam 2. However, in this configuration, if an attempt is made to use a spring force adjusting mechanism as shown in FIGS. 2 and 5, the operation of turning the spring force adjusting screw 15 from within the surface in the vertical thickness direction of the door 22 is unreasonable. Therefore, as shown in FIGS. 7 and 8, two spring force adjusting members 14 each having an inclined surface 19 at the end opposite to the axis 3 of the spring member 6 are arranged in combination, and the spring force of one of them is arranged. An internal thread portion 16 is formed on the adjustment member 14, and the spring force adjustment screw 15 is inserted into the internal thread portion 16 so that the head of the spring force adjustment screw 15 is vertically arranged. Install it so that it will idle. Then, when the spring force adjusting screw 15 is turned from the state shown in FIG. 8, the spring force adjusting member 14 on the side having the female thread portion 16 moves in the vertical direction, and the other spring force adjusting member 14 is laterally moved by the inclined surfaces 19. Will move in the direction. This operation pushes and pulls the spring member 6 in the bending direction, and as a result, it is possible to adjust the urging force of the tip protrusion 5 of the pushing bit 4 to the outer peripheral surface of the columnar cam 2. Therefore, when the configuration shown in FIG. 8 is arranged on the upper portion of the door 22, the spring force adjusting screw 15 can be turned with the door 22 opened.

  In the above description, the pivoting hinge has been described in which the axial center 3 is disposed outside the thick portion of the door 22. However, the above-described closing mechanism has the axial center 3 within the thick portion of the door 22. It is also suitable for a configuration with a central suspension. FIG. 9 is a top view of a configuration in which the door 22 is opened 90 degrees in both directions on the outside of the indoor side by the central suspension. In this case, as shown in FIG. 9, the outer peripheral shape of the columnar cam 2 is made symmetrical with respect to the center line in the closed state of the door, and the front end protrusion of the pushing bit 4 with the door 22 closed. It is preferable that the inclined surface 9 is formed in both directions from the recessed portion 8 with which 5 abuts, and is formed in an outer peripheral shape that continues to the curved surface 10 as it is. In the same manner as described above, the spring member 6 and the pushing bit 4 are arranged in a direction parallel to the door 22. Then, even if the door 22 is opened to either the inside or outside of the room, an operation of returning to the closed position can be obtained. Furthermore, since the front end protrusion 5 is pressed against the inclined surfaces 9 on both sides of the recessed portion 8 in a closed state with a certain force or more, it is excellent in that the closed position of the door 22 is stopped and held. Further, in this central suspension configuration, a configuration in which the closing mechanism is disposed on the upper and lower surfaces of the door 22 and the spring force adjusting member 14 is incorporated only in the upper door pivot that can be operated by a screwdriver or the like is suitable.

  Further, when the configuration of the central suspension shown in FIG. 9 is developed, the suspension door carriage moves in the rails arranged on the upper frame as shown in FIG. 10, and the door end portion is opened in one direction or both directions. It can also be deployed on folding doors. And it can provide as a folding door which has a self-closing mechanism by using said closing mechanism for the axial center 3 part of the hanging door side of a folding door. Further, in this configuration, since the pushing bit 4 is urged by the spring member 6 with a strong force in the recessed portion 8 sandwiched between the both inclined surfaces 9 of the columnar cam 2, the door 22 is connected to the frame body 23 in the same manner as in FIG. It can be held in a parallel state. Furthermore, in the double-open structure that can be opened by pushing both indoors and outdoors, the inner surface of the frame 23 and the front end of the door 22 can be held at a closed position even with a relatively weak force. For example, it is assumed that a click feeling such as a roller catch is necessary, and the above-described configuration capable of enhancing the final closing force is considered to be very effective even in the double-fold folding door. Moreover, it is naturally possible to use this configuration for an ordinary folding door for a storage space, and it can be provided as a storage folding door with a closing mechanism.

  Next, as shown in FIG. 11, a configuration in which a closing mechanism is embedded in the floor surface like a floor hinge in a centrally suspended arrangement is also possible. However, when such usage is assumed, since it is considered that the door is relatively large and heavy, such as a glass door used in public facilities, a stronger closing force is considered necessary. Therefore, as shown in FIG. 11, the columnar cam 2 is formed in a shape in which a recessed portion 8 which is further symmetrically reversed from the double-opened shape in FIG. 9 is provided in a left-right symmetrical position, and the pushing bit 4 is attached to the spring member 6 from one side. It is good to arrange so that it may energize by compressing, and to arrange so that pushing bit 4 may be energized by pulling spring member 6 from the opposite side. In other words, the two inner spring members 6 in FIG. 11 are compression springs that press one side of the columnar cam 2, and the two outer spring members 6 are tension springs that are attached by a force that pulls the opposite side of the columnar cam 2. It will be fast.

  Therefore, the column cam 2 is urged with the same force from both sides, and a greater closing force can be obtained by the rotation of the column cam 2. Compared with the configuration in which one pushing bit 4 is biased by the spring member 6 only from one side of the columnar cam 2 as described above, not only the biasing force of the spring member 6 is approximately doubled, but also the same force. Since it is sandwiched from both sides, it is very excellent in that the friction during rotation between the frame side case 1 and the bush 7 or between the shaft center 3 and the bush 7 is greatly reduced. It is possible. Also in this configuration, a spring force adjusting mechanism is considered necessary. As the means, although not shown in the drawings, the means for operating the two spring force adjusting screws 15 individually is simple with a structure in which the two spring force adjusting members 14 are used to move in different directions. However, it cannot be said that this means takes time for adjustment and the biasing force by the spring members 6 on both sides may be different.

  Therefore, as shown in FIG. 12, a trapezoid having slopes 19 at both ends and having a female thread portion 16 in the middle, such as the spring force adjusting member 14 shown in FIG. These spring force adjusting members 14 are provided, and two spring force adjusting members 14 having inclined surfaces 19 on both sides thereof are preferably arranged with the inclined surfaces 19 facing each other. Then, the spring force adjusting screw 15 is screwed into the female thread portion 16 and assembled so as to idle with respect to the frame side case 1. Then, the operation of turning the spring force adjusting screw 15 moves the middle spring force adjusting member 14 in the vertical direction, and the spring force adjusting members 14 on both sides thereof are simultaneously moved in both lateral directions. Therefore, if a compression spring is disposed on the spring force adjusting member 14 that is closer to the shaft center 3 and a tension spring is disposed on the spring force adjusting member 14 that is further away from the shaft center 3 by this operation, a single spring is obtained. The force adjusting screw 15 can perform the adjustment work of the urging force of the spring member 6 evenly.

  As described above, the above-described closing mechanism can provide a certain level of closing force, particularly a large closing force at the final stage of closing. By further using this feature, the door 22 is not simply closed, but once at the final stage of closing. A braking mechanism that decelerates to a low speed and then slowly closes to the end can be added to a limited extent. That is, as shown in FIG. 13, oil is enclosed in a straight tube cylinder type, and when the tip of the retracting pin 21 is pushed, a large load is generated during a fast immersing operation, and a small load is generated during a slow immersing operation. It is preferable that the damper 20 having the structure not to be mounted is mounted on the door bottom surface of the door 22 and arranged so that the tip of the retracting pin 21 is in contact with the mounting surface of the frame side pivot or the inner surface of the vertical frame at the final stage of closing.

  As a setting method of the closing operation in this case, when the door 22 is left open after being opened to an arbitrary angle, the closing force in that state is stronger than the frictional resistance of the upper and lower pivot hinges generated during opening and closing. If this is done, the closing operation starts immediately. In the state immediately before the retracting pin 21 of the damper 20 comes into contact with the frame body 23 at the final stage of closing, even when the damper 20 is closed at a low speed without any inertial force, it remains slowly without losing the braking force of the damper 20. It is preferable to set the closing force of the door 22 with the spring force adjusting screw 15 so that the door 22 can be continuously closed. As a result, a large load due to the characteristics of the damper 20 can be obtained even in a state of being closed at a slightly higher speed, and a certain amount of deceleration operation can be performed. As a result, within the above range, even when the closing speed is increased, it is possible to realize an operation of slowly closing to the final stage after deceleration due to the braking effect of the damper 20. This means can be adopted because the above-described closing mechanism has the maximum closing force in the final closing stage. In addition, although the protruding and retracting pin 21 of the damper 20 in FIG. 13 is shown as it is exposed, when the actual door 22 is closed, the tip of the protruding and retracting pin 21 moves in the lateral direction while contacting the inner surface of the vertical frame. Although not shown, it is advisable to provide a guide so that the in / out pin 21 is surely sunk straight along with a measure such as providing a roller at the tip.

It is a perspective view of the pivot hinge with a closing mechanism of the present invention. It is a top view of the structure which provided the closing mechanism in the frame side pivot of the pivot hinge with the closing mechanism of this invention. It is a top view of the columnar cam of the pivot hinge with the closing mechanism of the present invention. It is a locus | trajectory figure which shows the operation | movement by rotation of a columnar cam of the pivot hinge with a closing mechanism of this invention. It is a top view of another spring force adjustment mechanism of the pivot hinge with a closing mechanism of the present invention. It is a top view of the columnar cam which has a groove part of the pivot hinge with a closing mechanism of this invention. It is a top view of the structure which provided the closing mechanism in the door side pivot of the pivot hinge with the closing mechanism of this invention. It is a side view of the structure which provided the closing mechanism in the door side pivot of the pivot hinge with the closing mechanism of this invention. It is a top view of the structure which provided the closing mechanism in the center suspension accommodation of the double opening of the pivot hinge with the closing mechanism of this invention. It is an upper surface accommodation figure of the structure which provided the closing mechanism in the folding door of the pivot hinge with the closing mechanism of this invention. It is a top view of the structure where the pushing bit was urged | biased from the right-and-left both sides of the columnar cam of the pivot hinge with a closing mechanism of this invention. It is a side view of the structure which pushed in the pushing bit from the right-and-left both sides of the columnar cam of the pivot hinge with a closing mechanism of this invention. It is a perspective view of the structure which provided the cylinder type damper in the pivot hinge with a closing mechanism of this invention.

a Frame side lower pivot
b Door side lower pivot
DESCRIPTION OF SYMBOLS 1 Frame side case 2 Columnar cam 3 Shaft center 4 Pushing bit 5 Tip protrusion 6 Spring member 7 Bush 8 Recessed part 9 Inclined surface 10 Curved surface 11 Circumferential surface 12 Shaft part fitting hole 13 Atypical part 14 Spring force adjustment member 15 Spring force adjusting screw 16 Female thread portion 17 Shaft center insertion hole 18 Groove portion 19 Slope 20 Damper 21 Retracting pin 22 Door 23 Frame

Claims (7)

A pivot hinge for a door having a closing mechanism, provided with an axial center, a columnar cam having a unique outer peripheral surface including an inclined surface and a curved surface, a push-in bit provided with a tip protrusion, and a spring member. The shaft center is integrated at the center position of the cam, and it is rotatably mounted on either the frame side or the door side pivot hinge case, and the tip of the push bit is inserted into the case on the outer peripheral surface of the columnar cam. A closing mechanism is formed by urging in the axial direction by a spring member in a state of being in contact with the shaft, and a shaft part fitting hole is provided in the other pivot hinge so that the shaft part fitting hole and the shaft center cannot rotate with respect to each other. When the door is opened, the columnar cam rotates and the spring member is bent while the spring member is bent to move the pushing bit, and within the predetermined opening angle range, the opening operation is continued. If left unattended Pivot with closing mechanism characterized in that the closing projection of the door is obtained together with the operation of rotating the columnar cam in the returning direction by pushing the outer peripheral surface of the columnar cam by the front end protrusion of the insertion bit by the biasing force of the spring member Hinge. The columnar cam has a columnar shape that has the same cross-sectional shape and is long in the vertical direction, and an axial center with an irregularly shaped tip is integrated at the center, and the outer peripheral surface is continuous from the recessed portion provided near the reference line position. In addition, an inclined surface whose distance from the center of the shaft center to the outer peripheral surface changes extremely in a narrow opening angle range, and a distance from the center of the shaft center to the outer peripheral surface with respect to the same continuous unit opening angle. The pivot hinge with a closing mechanism according to claim 1, further comprising: a curved surface set so as to gradually change. In the case of the pivot hinge, the pushing bit is biased to the columnar cam by a plurality of spring members, and in the closed state, the tip protrusion of the pushing bit is in contact with the inclined surface near the recessed portion of the columnar cam, Along with the opening and closing operation, the shaft center and the columnar cam are rotated, and at the initial stage of opening, the tip of the pushing bit is pushed by the inclined surface and the spring member is greatly bent and moved in the case, and then the door When the opening is opened, the spring member is gradually bent while the tip protrusion of the push-in bit abuts the curved surface, and if it is left as it is within the range up to the predetermined opening angle of the door where the tip protrusion reaches the final position of the curved surface, The door closing operation is obtained by the strength based on the degree of tangential inclination of the outer peripheral surface at the position where the tip protrusion abuts and the biasing force of the spring member at that time. Closing mechanism with a pivot hinge of Claim 1 or 2. The pushing bit is formed by dividing into two members having slopes, one of which has a tip protrusion and is in contact with the outer peripheral surface of the columnar cam, and the other has a shape in which a spring member is arranged. The two slopes face each other and are arranged in the case, and the direction of the force of the spring member is changed to a right angle direction on the slopes of each spring, and the tip protrusion is urged to the outer peripheral surface of the columnar cam. The pivot hinge with a closing mechanism according to claim 1. The shape of the outer peripheral surface having an inclined surface or a curved surface with respect to a reference line passing through the recessed portion, with a configuration in which the columnar cam is arranged in a centrally suspended door that can be opened and closed in either direction from the inside to the outside of the room from the closed state. In the closed position of the door, the front end protrusion of the push-in bit keeps this closed state with a relatively strong force in contact with both inclined surfaces of the recessed part of the columnar cam, and the room The pivot hinge with a closing mechanism according to any one of claims 1 to 3, wherein the closing operation is obtained in a predetermined angle range from the open state toward either the inside or outside. It is arranged on a centrally suspended door that can be opened and closed in either direction from the inside of the room to the outside of the room from the closed state. A shaft center and a columnar cam are arranged at one end of the case, and the columnar cam passes through the recessed portion. The outer peripheral surface having an inclined surface or curved surface with respect to the reference line is formed symmetrically with respect to the longitudinal reference line, and is also formed symmetrically with respect to the vertical reference line. A pusher bit having a tip protrusion is arranged on each part, and one pusher bit is urged to the outer peripheral surface of one of the columnar cams by a compression spring from the other end of the case, and the other pusher bit is also 6. The pivot hinge with a closing mechanism according to claim 1 or 5, wherein the pivot cam is biased from the other end side to the other outer peripheral surface of the columnar cam by a pull spring. When either the door or the frame is a straight cylinder type, oil is sealed inside, and when the tip of the retracting pin is pushed, a large load is generated during a strong immersion operation, and only a small load is generated during a weak immersion operation. The damper is configured to generate a load, and in the angle range in which the closing force at the final stage of closing is increased, the protruding and retracting pins are sunk by contact with the frame or door, and the braking operation is performed The pivot hinge with a closing mechanism according to claim 1 or 2, characterized in that it is possible.