JP7097795B2 - Floor hinge - Google Patents

Description

The present invention relates to floor hinges.

Conventionally, there has been known a floor hinge that rotatably supports a door installed in an opening of a building from the floor in a state of being urged in the closing direction of the opening. This type of floor hinge is used by being embedded in the floor surface of an opening of a building, and has a rotating shaft protruding on the floor surface connected to the door and the rotating shaft in which the door rotates in the closing direction. It has a hinge case that rotatably supports it in a urged state. In the hinge case, oil is stored inside, and by adjusting the flow rate of the oil, the rotational urging force on the rotating shaft by the rotational energy based on the elastic force stored in the compression coil spring when the door is opened is adjusted. A mechanism is provided.

The following Patent Document 1, for example, exists as a disclosure of a commonly known general floor hinge. The configuration of the floor hinge described in Patent Document 1 below is divided into two pressure medium chambers in which the inner chamber of the hinge case (casing) is blocked by a piston member (piston), and these pressure medium chambers are divided into two pressure medium chambers. It is provided with a passage for allowing the pressure medium to flow out from the pressure chamber, which should be reduced by closing the door, in various different ways, and is further arranged in the piston member (piston) to close the door. It is of a type that can be connected to each other by a safety valve that opens with an overpressure inside.

Japanese Unexamined Patent Publication No. 56-003777

However, in the conventionally known general floor hinges represented by Patent Document 1 described above, the end portion of the compression coil spring that generates rotational energy based on the elastic force is pressed by a member that comes into flat contact with the piston. There has been a problem that the compression coil spring is displaced from the axis of the member, the compression coil spring is buckled, and a stable elastic force cannot be generated.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a piston member so that the compression coil spring constituting the floor hinge can stably generate an elastic force. It is an object of the present invention to provide a floor hinge having a structure in which the phenomenon that the compression coil spring is not displaced from the axis does not occur.

Hereinafter, the present invention will be described. The reference numbers of the accompanying drawings are added in parentheses to facilitate understanding of the present invention, but the present invention is not limited to the illustrated form.

The floor hinge (10) according to the present invention is arranged on one end side of a hinge case (11) provided with an oil chamber (12) filled with hydraulic oil, and is connected to a door. A rotating shaft (14) that rotates with the opening / closing operation of the door, a non-circular cam member (15) fixedly installed on the rotating shaft (14), and an outer peripheral surface of the cam member (15). A slide plate (17) and a slide plate (17) that reciprocate in the hinge case (11) with the rotational movement of the cam member (15) by providing a cam follower (16) arranged so as to be slidable. ), And the end of the rod member (18) opposite to the slide plate (17) connection side, and the oil chamber is referred to as the first oil chamber (12a). A piston member (19) that is divided into a second oil chamber (12b) and is reciprocally installed in the oil chamber (12), and a hinge case (11) that forms the oil chamber (12). A compression coil spring that constantly exerts a urging force in a fixed direction on the piston member (19) by being arranged between the stopper-shaped portion (11a) formed on the inner wall surface of the spring and the piston member (19). By adjusting the amount of hydraulic oil transferred between (31) and the first oil chamber (12a) and the second oil chamber (12b) accompanying the reciprocating movement of the piston member (19). A floor hinge (10) including a control mechanism unit (11b, 11c, 11d, 20) that controls the moving speed of the piston member (19) and thereby controls the door opening speed or the door closing speed. The end of the compression coil spring (31) forms a plane in a direction in which at least three-quarters of one turn constituting the end is orthogonal to the compression direction of the compression coil spring (31). The member (40, 18) that has been processed and comes into contact with the end of the compression coil spring (31) has a slanted shape (40a) or an inclination with respect to the direction of the urging force exerted by the compression coil spring (31). The slanted shape (40, 18) of a member (40 , 18) having a curved surface shape (18b) and in contact with the flat surface of the end portion of the compression coil spring (31) and the end portion of the compression coil spring (31). It is characterized in that the curved surface shape (18b) or the curved surface shape (18b) is configured to be in line contact with each other.

Further, in the floor hinge (10) according to the present invention, the member (40) in contact with the end of the compression coil spring (31) on the installation side of the piston member (19) in the rod member (18) is a truncated cone. The compression coil spring (31) is positioned by providing the shape portion (40a) and inserting a part of the truncated cone shape portion (40a) into the inner peripheral portion of the compression coil spring (31). Can be.

Further, in the floor hinge (10) according to the present invention, the member (18) in contact with the end of the compression coil spring (31) on the connection side of the slide plate (17) in the rod member (18) has an R shape. A portion (18b) is provided, and a part of the R-shaped portion (18b) is inserted into the inner peripheral portion of the compression coil spring (31) to position the compression coil spring (31). can do.

Further, in the floor hinge (10) according to the present invention, the valve member (20) constituting a part of the control mechanism unit (11b, 11c, 11d, 20) is the rod member (18) and the piston member (18). It can be configured to also serve as a means for fixing the connection with 19).

According to the present invention, the floor is provided with a configuration in which the compression coil spring does not shift from the axis of the piston member so that the compression coil spring can stably generate an elastic force. A hinge can be provided. By providing the above-mentioned configuration, the present invention makes it possible to realize a floor hinge having excellent assemblability.

It is a figure which shows the appearance shape of the floor hinge which concerns on this embodiment, and the segment (a) in the figure shows the top view of the floor hinge, and the segment (b) shows the side view. It is a figure for demonstrating the specific structure of the floor hinge which concerns on this embodiment, the sectional drawing (a) in the figure shows the cross section AA in FIG. 1, and the sectional drawing (b) is B in FIG. -B cross section is shown. It is a figure which showed a part of the member which constitutes the floor hinge 10 which concerns on this embodiment, and the sectional drawing (a) in the figure corresponds to the sectional drawing (a) of FIG. (B) corresponds to the subdivision (b) of FIG. It is sectional drawing which shows the valve member which concerns on this embodiment, and the sectional drawing (a) in the figure shows the state which the valve member which has the function of a check valve is closed in the door closing operation, and the sectional drawing (b) is open. It shows a state in which the valve member having the function of a check valve is opened when the door is operated. It is a figure for demonstrating the operation of the floor hinge which concerns on this embodiment, and in particular, shows the floor hinge when the door is fully opened. It is a figure for demonstrating the operation of the floor hinge which concerns on this embodiment, and in particular, shows the floor hinge in the state where the door (not shown) is in the process of closing a door up to a door opening angle of 95 degrees. It is a figure for demonstrating the operation of the floor hinge which concerns on this embodiment, and in particular, shows the floor hinge in the state where the door (not shown) is in the process of closing a door up to a door opening angle of 90 degrees. It is a figure for demonstrating the operation of the floor hinge which concerns on this embodiment, and in particular, a door (not shown) closes a door up to a door opening angle of 74 degrees, DA mode ends and 1st speed mode starts. Shows the floor hinge in the state. It is a figure for demonstrating the operation of the floor hinge which concerns on this embodiment, and in particular, the door (not shown) closes a door up to a door opening angle of 15 degrees, the 1st speed mode ends, and the 2nd speed mode is started. Shows the floor hinges in the normal state. It is a figure for demonstrating the operation of the floor hinge which concerns on this embodiment, and in particular, shows the floor hinge when the door (not shown) is closed to the fully closed angle.

Hereinafter, suitable embodiments for carrying out the present invention will be described with reference to the drawings. It should be noted that the following embodiments do not limit the invention according to each claim, and not all combinations of features described in the embodiments are essential for the means for solving the invention. ..

First, a specific configuration of the floor hinge 10 according to the present embodiment will be described with reference to FIGS. 1 to 3. Here, FIG. 1 is a diagram showing the external shape of the floor hinge according to the present embodiment, in which the segment (a) shows the top view of the floor hinge and the segment (b) shows the side view. ing. Further, FIG. 2 is a diagram for explaining a specific configuration of the floor hinge according to the present embodiment, and FIG. 2A in the figure shows a cross section taken along the line AA in FIG. 1 and is a sectional view (b). ) Shows the BB cross section in FIG. Note that FIG. 2 is a diagram showing the state of the floor hinge 10 when the door is fully closed. Further, FIG. 3 is a diagram showing a part of the members constituting the floor hinge 10 according to the present embodiment, and the segment (a) in the diagram corresponds to the segment (a) in FIG. , The segment (b) in the figure corresponds to the segment (b) in FIG.

The floor hinge 10 according to the present embodiment is configured to have a hinge case 11 including an oil chamber 12 filled with hydraulic oil. The hinge case 11 is a member having an external shape having a substantially rectangular cuboid shape. The inside of the hinge case 11 is hollow as an oil chamber 12 filled with hydraulic oil, and an opening portion for opening the hollow is formed on the surface on the right side of the paper surface in FIG. This open portion is closed by the plugging member 13, and the oil chamber 12 is formed by closing the cavity.

On one end side of the hinge case 11 (on the left side of the paper in FIGS. 1 and 2), a rotating shaft 14 that is connected to a door (not shown) and rotates as the door opens and closes is arranged in a rotatable state. .. A cam member 15 having a substantially heart shape, which is a non-circular shape, is fixedly installed at the center of the substantially shaft of the rotating shaft 14 (see FIG. 2).

A cam follower 16 is arranged at a position on the left side of the paper surface in FIG. 2 with respect to the arrangement position of the cam member 15, and the cam follower 16 is fixedly installed with respect to the slide plate 17 in a state where the outer ring is rotatable. Since the cam follower 16 is arranged so as to be slidable with the outer peripheral surface of the cam member 15, when a door (not shown) opens and closes, the cam member 15 having a substantially heart shape rotates together with the rotating shaft 14, and the cam member The outer ring of the cam follower 16 rotates along the outer peripheral surface of the cam member 15 while always maintaining the state of sliding contact with the outer peripheral surface of the cam member 15. That is, due to the action of the cam member 15 having a substantially heart-shaped cam shape, the cam follower 16 and the slide plate 17 on which the cam follower 16 is fixedly installed move back and forth in the hinge case 11 in the left-right direction of the paper surface in FIG. It is configured to do.

Further, a rod member 18 is connected to the slide plate 17. The rod member 18 is arranged on the side opposite to the side where the cam follower 16 is installed in the slide plate 17, and the cam member 15 is the cam follower 16 in the cross-sectional view taken along the line AA shown in FIG. It is arranged so as to be located between the rod member 18 and the rod member 18.

A piston member 19 is installed at an end of the rod member 18 opposite to the slide plate 17 connection side. The piston member 19 exerts a function of dividing the oil chamber 12 formed inside the hinge case 11 into a hydraulic oil chamber 12a which is a first oil chamber and a pressure oil chamber 12b which is a second oil chamber. It is a member. As described above, when the door (not shown) opens and closes, the slide plate 17 reciprocates in the hinge case 11 in the left-right direction of the paper surface in FIG. 2, so that the slide plate 17 and the rod member 18 attached to the slide plate 17 move back and forth. The piston member 19 also reciprocates in the oil chamber 12 in the left-right direction of the paper surface in FIG. When the door is fully closed as shown in FIG. 2, the piston member 19 is arranged at a position where the pressure oil chamber 12b, which is the second oil chamber, is narrowest, and the operation of the first oil chamber. The oil chamber 12a will be arranged at the widest position. Further, as the door opening operation is performed from the fully closed state of the door (not shown) and the door opening angle becomes larger, the piston member 19 moves in the direction of expanding the oil pressure chamber 12b, which is the second oil chamber, and at the same time, the second oil chamber is expanded. It will move in the direction of narrowing the hydraulic oil chamber 12a, which is the oil chamber of 1.

Further, the piston member 19 according to the present embodiment is provided with a valve member 20 having two functions of a check valve and a forced closing valve as one member. The valve member 20 allows the hydraulic oil to flow from the hydraulic oil chamber 12a, which is the first oil chamber, to the pressure oil chamber 12b, which is the second oil chamber, while allowing the hydraulic oil to flow in the opposite direction. It is a valve body that has the function of a check valve that stops. Therefore, when the door (not shown) is opened from the fully closed state shown in FIG. 2 and the piston member 19 moves in the oil chamber 12 from the right side to the left side of the paper surface in FIG. 2, the valve member 20 is set. The piston member 19 moves in the oil chamber 12 by allowing the hydraulic oil to flow from the hydraulic oil chamber 12a, which is the first oil chamber, to the pressure oil chamber 12b, which is the second oil chamber. It is configured so as not to interfere with. On the other hand, when the door (not shown) closes from the open state to the fully closed state shown in FIG. 2, the piston member 19 moves in the oil chamber 12 from the left side to the right side of the paper in FIG. Occasionally, the valve member 20 does not allow the flow of hydraulic oil.

Further, the function of the valve member 20 as a forced closing valve is a function that operates when an abnormal hydraulic pressure is generated in the hydraulic oil in the oil chamber 12, such as when the control mechanism unit described later does not function. The floor hinge 10 according to the present embodiment can also function as a safety device.

Here, with reference to FIG. 4, a specific configuration of the valve member 20 according to the present embodiment will be described. FIG. 4 is a cross-sectional view showing a valve member according to the present embodiment, and FIG. b) shows a state in which the valve member having the function of a check valve is opened during the door opening operation.

The valve member 20 according to the present embodiment has a valve seat 23 having a substantially T-shaped cross section. The valve seat 23 has a through hole 23a so as to penetrate the center of a substantially T-shaped vertical bar, and a valve body 22 having a substantially T-shaped cross section is inserted and installed in the through hole 23a. ing. An O-ring 24 is installed in the valve body 22, and when the valve body 22 is installed so as to close the through hole 23a, the O-ring 24 is installed between the valve seat 23 and the valve body 22. Is configured to block the flow of hydraulic oil between the valve seat 23 and the valve body 22.

The valve body 22 also has an inner passage 27 formed so as to pass through the center of a substantially T-shaped vertical bar. The inner passage 27 is formed so as to penetrate the valve body 22. Further, the valve body 22 is formed with a side hole 25 in a direction orthogonal to the penetrating direction of the inner passage 27, and is configured so that hydraulic oil can flow not only from the inner passage 27 but also from this side hole 25. ing. Further, the internal shape of the inner passage 27 is composed of a portion having a wide inner diameter and a portion having a narrow inner diameter, and a safety valve 29 and a coil spring 28 are arranged in the portion having a wide inner diameter. The coil spring 28 is installed in a state where one end is fixed by a stopper pin 26 installed on the valve body 22 and the other end is sandwiched between the heads of the safety valve 29. Therefore, the coil spring 28 constantly exerts an elastic force of the spring on the safety valve 29 inside the inner passage 27, the safety valve 29 is always pressed by the coil spring 28, and the head of the safety valve 29 is in the inner passage 27. It is configured to close the inner passage 27 by pushing a portion having a narrow inner diameter. Further, the stopper pin 26 installed in the valve body 22 is also used as a member for restricting the movable range of the valve body 22, and serves as a stopper for the valve body 22 moving in the through hole 23a of the valve seat 23. Has the function of.

Since the valve member 20 according to the present embodiment has the configuration described above, when the piston member 19 moves in the direction of narrowing the pressure oil chamber 12b, which is the second oil chamber, the valve member 20 is shown in FIG. As shown in (a), the valve body 22 receives the hydraulic pressure on the pressure oil chamber 12b side, which is the second oil chamber, and is relatively closer to the hydraulic oil chamber 12a, which is the first oil chamber, with respect to the valve seat 23. In the moved state, the O-ring 24 comes into contact with the end surface of the valve seat 23, and the side hole 25 is closed. During the door opening operation in which the piston member 19 moves toward the hydraulic oil chamber 12a, which is the first oil chamber, the hydraulic oil chamber in which the valve body 22 is the first oil chamber is shown in FIG. It is in a state of being moved to the pressure oil chamber 12b side, which is the second oil chamber, relative to the valve seat 23 by receiving the hydraulic pressure on the 12a side, and the stopper pin 26 of the valve body 22 hits the end surface of the valve seat 23. The O-ring 24 is in contact with the valve seat 23 away from the end surface of the valve seat 23 toward the oil pressure chamber 12b, which is the second oil chamber, and the side hole 25 is in an open state. The hydraulic oil on the hydraulic oil chamber 12a side, which is the first oil chamber, can flow to the pressure oil chamber 12b side, which is the second oil chamber. That is, the inner passage 27 and the side hole 25 of the valve body 22 form a communication hole that communicates the hydraulic oil chamber 12a, which is the first oil chamber, and the pressure oil chamber 12b, which is the second oil chamber. .. The inner passage 27 of the valve body 22 is opened not only on the end surface of the valve body 22 on the hydraulic oil chamber 12a side, which is the first oil chamber, but also on the end surface on the pressure oil chamber 12b side, which is the second oil chamber. However, the opening on the pressure oil chamber 12b side is always closed by the safety valve 29 which is pressed and urged to the pressure oil chamber 12b side by the coil spring 28, and the door is forcibly closed by an external force. When the pressure on the pressure oil chamber 12b side, which is the oil chamber of 2, suddenly increases, the safety valve 29 resists the urging force of the coil spring 28 by the increased pressure of the pressure oil chamber 12b to push the coil spring 28. While compressing, it moves in the direction of the hydraulic oil chamber 12a to open the opening on the pressure oil chamber 12b side in the inner passage 27.

Although the valve member 20 has the above configuration and operation, the valve member 20 according to the present embodiment also has a feature in the mounting method. That is, in the valve member 20 according to the present embodiment, the thread groove 23b is formed on the outer peripheral surface of the substantially T-shaped vertical bar of the valve seat 23 having a substantially T-shaped cross section. Then, as shown in FIG. 3, the screw groove 23b is configured to be screwed into the screw hole 18a formed at the shaft end portion of the rod member 18 on the side where the piston member 19 is installed. Then, when the valve member 20 is screwed and joined to the rod member 18, the piston member 19 is fixed to the rod member 18 by sandwiching the piston member 19 between the shaft end portion of the rod member 18 and the valve member 20. be able to. That is, the valve member 20 according to the present embodiment not only has two functions of a check valve and a forced closing valve as one member, but also functions as a means for connecting and fixing the rod member 18 and the piston member 19. It is a member that can be used. Such a configuration leads to a reduction in the number of parts of the members constituting the floor hinge 10 as compared with the conventional technique, and realizes an effect of reducing the manufacturing cost and an effect of improving the assembling property.

Further, as shown in FIG. 2, in the hinge case 11, in addition to a mechanical member such as a valve member 20, a pressure oil chamber 12b which is a second oil chamber and a hydraulic oil chamber 12a which is a first oil chamber are provided. It is different from the 1st speed flow path 11b and the 2nd speed flow path 11c to be connected, and the 1st speed flow path 11b connecting the pressure oil chamber 12b which is the second oil chamber and the hydraulic oil chamber 12a which is the first oil chamber. A unique flow path such as a DA flow path 11d is formed. The control mechanism unit according to the present embodiment is formed by these mechanical members and flow paths, and is the hydraulic oil chamber 12a and the second oil chamber, which are the first oil chambers accompanying the reciprocating movement of the piston member 19. By adjusting the amount of moving oil of the hydraulic oil between the pressure oil chambers 12b, the moving speed of the piston member 19 can be controlled, and thus the door opening speed or the door closing speed can be controlled.

Here, a stopper-shaped portion 11a is formed on the inner wall surface of the hinge case 11 forming the oil chamber 12 (see the subdivision (b) in FIG. 2). The stopper-shaped portion 11a is formed at a position slightly distant from the connection position between the slide plate 17 and the rod member 18 toward the piston member 19. A compression coil spring 31 that constantly exerts a urging force in a constant direction on the piston member 19 is arranged between the stopper shaped portion 11a and the piston member 19. That is, in the compression coil spring 31 according to the present embodiment, when the door is fully closed, the coil end portion on the left side of the paper surface in FIG. 2 is in contact with the stopper shape portion 11a, and the coil on the right side of the paper surface in FIG. Since the end portion is in contact with the piston member 19, the piston member 19 is configured to constantly press the piston member 19 toward the right side of the paper surface in FIG. The direction of the urging force exerted by the compression coil spring 31 is a direction in which a load is applied to the door opening operation when the door (not shown) is fully closed to open the door, and the door (not shown) has a load. On the other hand, it is a mechanism that constantly exerts a constant force.

Here, in the present embodiment, as a configuration for installing the compression coil spring 31, the cross-sectional shape of the member in contact with the end portion of the compression coil spring 31 is inclined with respect to the direction of the urging force exerted by the compression coil spring 31. It is characterized by having a slanted slope shape or a curved surface shape. The features will be specifically described with reference to FIG.

First, in the present embodiment, the member of the rod member 18 that comes into contact with the end of the compression coil spring 31 on the side where the piston member 19 is installed is configured as the stopper member 40 provided with the truncated cone-shaped portion 40a. The stopper member 40 is fixedly installed at the shaft end portion of the rod member 18 via the connection pin 41, and a part of the conical trapezoidal portion 40a of the stopper member 40 is inserted into the inner peripheral portion of the compression coil spring 31. By doing so, the inclined slope of the surface of the conical trapezoidal portion 40a exerts a centering action on the coil-shaped compression coil spring 31, so that the axial center of the rod member 18 and the urging direction of the compression coil spring 31 are adjusted. It is realized that the compression coil spring 31 is roughly aligned and the compression coil spring 31 is positioned.

On the other hand, in the present embodiment, a configuration is adopted in which the member in contact with the end portion of the compression coil spring 31 on the anti-piston member installation side of the rod member 18 includes an R-shaped portion 18b. The R-shaped portion 18b has a shape provided on the shaft end portion on the installation side of the rod member 18 with the slide plate 17, and a part of the R-shaped portion 18b is inserted into the inner peripheral portion of the compression coil spring 31. By doing so, the compression coil spring 31 is positioned. The R-shaped portion 18b does not come into contact with the compression coil spring 31 when the floor hinge 10 according to the present embodiment is completed and operates, and the compression coil spring 31 is assembled when the floor hinge 10 is assembled. It is useful in that it can exert a function of aligning the rod member 18 with respect to the axis of the rod member 18.

The configuration of the present embodiment described above is a member in contact with the end portion of the compression coil spring 31 and the end portion of the compression coil spring 31 (conical cone-shaped portion 40a of the stopper member 40, R-shaped portion 18b of the rod member 18). It can be said that and are configured to make line contact. By providing such a configuration, it is possible to realize a configuration in which the compression coil spring 31 does not shift from the axis of the piston member 19, so that the compression coil spring 31 stably generates an elastic force. The floor hinge 10 can be provided. Further, by providing the floor hinge 10 according to the present embodiment with the above-mentioned configuration, it is possible to provide the floor hinge 10 having excellent assemblability.

The specific configuration of the floor hinge 10 according to the present embodiment has been described above. Next, the operation of the floor hinge 10 according to the present embodiment will be described by adding FIGS. 5 to 10 to the reference drawings. Here, FIGS. 5 to 10 are views for explaining the operation of the floor hinge according to the present embodiment, and in particular, FIG. 5 shows the floor hinge when the door is fully open, and FIG. 6 shows the floor hinge. The floor hinge is shown when the door (not shown) is in the process of closing the door to the opening angle of 95 degrees, and FIG. 7 shows the door closing operation to the door not shown at 90 degrees. The floor hinge in the middle state is shown, and FIG. 8 shows a state in which the door (not shown) closes the door up to a door opening angle of 74 degrees, the DA mode ends, and the 1st speed mode starts. A floor hinge is shown, and FIG. 9 shows a floor hinge when a door (not shown) closes a door up to a door opening angle of 15 degrees, ends the 1st speed mode, and starts the 2nd speed mode. FIG. 10 shows a floor hinge when the door (not shown) is closed to the fully closed angle.

First, when the door (not shown) is in the fully open state, in the floor hinge 10 according to the present embodiment, the piston member 19 is arranged at a position where the second oil chamber, the pressure oil chamber 12b, is widest, and the second oil chamber is located. The hydraulic oil chamber 12a, which is the oil chamber of No. 1, is arranged at the narrowest position. At this time, the compression coil spring 31 is in the most compressed state, but one end side of the compression coil spring 31 (on the right side of the paper surface in FIG. 5) is held by the truncated cone-shaped portion 40a of the stopper member 40 in line contact. Therefore, the compression coil spring 31 does not shift or buckle due to the positioning effect due to the alignment action.

When the door closing operation (not shown) is continued from the state of FIG. 5, as shown in FIGS. 6, 7, and 8, the rod member 18, the piston member 19, and the like are formed by the shape action of the cam member 15 having a substantially heart shape. It moves to the right side of the paper in FIGS. 6 to 8. At this time, the valve member 20 does not allow the hydraulic oil to flow from the pressure oil chamber 12b, which is the second oil chamber, to the hydraulic oil chamber 12a, which is the first oil chamber, and the hydraulic oil does not flow. This is done by the DA flow path 11d. Therefore, from FIG. 5 in which the door not shown is fully open to FIG. 8 in which the door not shown is closed to a door opening angle of 74 degrees, the DA mode is terminated, and the 1st speed mode is started. During that time, a DA (delayed action) mode is executed in which the door (not shown) closes slowly.

After that, from the state shown in FIGS. 8 to 9, the door (not shown) is operated earlier by the 1st speed flow path 11b flowing the hydraulic oil, and further, the fully closed state shown in FIGS. 9 to 10 is performed. Until then, the door closing operation using the second speed flow path 11c for slowly and surely operating the door (not shown) to realize the surely closed state of the door is executed. In any of the operating states described with reference to FIGS. 5 to 10, in the floor hinge 10 according to the present embodiment, the stopper member 40 in contact with the end portion of the compression coil spring 31 and the end portion of the compression coil spring 31. Since it is configured to be in line contact with the truncated cone-shaped portion 40a, the compression coil spring 31 does not shift from the axial center of the piston member 19, and stable operation can be performed. It has become.

Although the preferred embodiment of the present invention has been described above, the technical scope of the present invention is not limited to the scope described in the above embodiment. Various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that the form with such changes or improvements may be included in the technical scope of the present invention.

10 floor hinge, 11 hinge case, 11a stopper shape part, 11b 1st speed flow path (part of control mechanism part), 11c 2nd speed flow path (part of control mechanism part), 11d DA flow path (part of control mechanism part) Part), 12 oil chamber, 12a hydraulic oil chamber (first oil chamber), 12b compression oil chamber (second oil chamber), 13 embedding member, 14 rotary shaft, 15 cam member, 16 cam follower, 17 slide Plate, 18 rod member (member that contacts the end of the compression coil spring), 18a screw hole, 18b R shape part (curved surface shape), 19 piston member, 20 valve member (part of control mechanism part), 22 valve body , 23 valve seat, 23a through hole, 23b thread groove, 24 O ring, 25 side hole, 26 stopper pin, 27 inner passage, 28 coil spring, 29 safety valve, 31 compression coil spring, 40 stopper member (end of compression coil spring) (Member that comes into contact with the part), 40a conical trapezoidal part (slope shape), 41 connection pin.

Claims (4)

A hinge case with an oil chamber filled with hydraulic oil,
A rotating shaft that is arranged on one end side of the hinge case and is connected to the door and rotates as the door opens and closes.
A non-circular cam member fixedly installed on the rotating shaft,
A slide plate that reciprocates in the hinge case with the rotational movement of the cam member by providing a cam follower that is arranged so as to be slidable with the outer peripheral surface of the cam member.
The rod member connected to the slide plate and
It is installed at the end of the rod member opposite to the slide plate connection side, the oil chamber is divided into a first oil chamber and a second oil chamber, and the oil chamber is reciprocally installed in the oil chamber. Piston member and
A compression coil spring that constantly exerts a urging force in a fixed direction on the piston member by being arranged between the stopper-shaped portion formed on the inner wall surface of the hinge case forming the oil chamber and the piston member. When,
The moving speed of the piston member is controlled by adjusting the amount of moving oil of the hydraulic oil between the first oil chamber and the second oil chamber accompanying the reciprocating movement of the piston member, thereby opening the door. A control mechanism that controls the door speed or door closing speed,
It is a floor hinge equipped with
The end of the compression coil spring is processed so that at least three-quarters of one turn constituting the end forms a plane in a direction orthogonal to the compression direction of the compression coil spring.
The member in contact with the end of the compression coil spring has a slope shape or a curved surface shape inclined with respect to the direction of the urging force exerted by the compression coil spring.
The floor hinge is configured such that the plane of the end of the compression coil spring and the slope shape or the curved surface shape of the member in contact with the end of the compression coil spring are in line contact with each other. .. The floor hinge according to claim 1 .
The member of the rod member that comes into contact with the end of the compression coil spring on the installation side of the piston member has a truncated cone-shaped portion, and a part of the truncated cone-shaped portion is inserted into the inner peripheral portion of the compression coil spring. By doing so, the floor hinge is characterized in that the compression coil spring is positioned. The floor hinge according to claim 1 or 2.
The member of the rod member that comes into contact with the end of the compression coil spring on the slide plate connection side has an R-shaped portion, and a part of the R-shaped portion is inserted into the inner peripheral portion of the compression coil spring. A floor hinge characterized in that the compression coil spring is positioned. The floor hinge according to claim 1 or 2 .
A floor hinge characterized in that a valve member constituting a part of the control mechanism portion is configured to also serve as a connecting and fixing means for connecting and fixing the rod member and the piston member.

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