JP6913608B2 - Floor hinge - Google Patents

Description

The present invention relates to a floor hinge that controls the opening / closing speed of a door.

Conventionally, when the door is closed from the open state to the fully closed state, there is a delayed action (hereinafter referred to as "DA") section in which the door is slowly closed for a certain section, and a high-speed shift is performed when the door is closed. There is a known floor hinge used to ensure that the door is fully closed by providing a 1st speed section. For example, Patent Document 1 below discloses an automatic door closer as a floor hinge that can realize the DA section and the first speed section as described above.

Japanese Unexamined Patent Publication No. 56-3777

However, regarding the automatic door closer as a floor hinge disclosed in Patent Document 1 described above, due to its structural reason, hydraulic oil flows out from the DA flow path even after switching from the DA section to the 1st speed section. There is a concern that the door will not close at the speed originally adjusted in the 1st speed section. Therefore, there is a demand for a floor hinge having a structure in which the door closes according to the speed originally adjusted in the 1st speed section by clearly switching between the DA section and the 1st speed section. However, in the prior art, the door closing speed is required. There was no floor hinge with a structure that could clarify the switching.

The present invention has been made in view of the above-mentioned problems existing in the prior art, and an object of the present invention is to prevent hydraulic oil from flowing out from the DA section from the moment when the DA section is switched to the 1st speed section. By doing so, it is intended to provide a floor hinge in which the DA section and the 1st speed section are clearly switched and the door is closed according to the originally adjusted speed in the 1st speed section.

Hereinafter, the present invention will be described. Reference numbers in 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) according to the rotational movement of the cam member (15) by providing a cam follower (16) arranged so as to be slidable. The rod member (18) connected to the above rod member (18) and the end of the rod member (18) on the opposite side to the slide plate (17) connecting side, and the oil chamber (12) is used as the first oil chamber (1). The piston member (19), which is divided into 12a) and the second oil chamber (12b) and is reciprocally installed in the oil chamber (12), and the piston member (19) are always in a fixed direction. The moving oil of the hydraulic oil between the elastic member (31) exerting the urging force of the above and the first oil chamber (12a) and the second oil chamber (12b) due to the reciprocating movement of the piston member (19). A floor hinge (10) including a control mechanism unit that controls the moving speed of the piston member (19) by adjusting the amount, thereby controlling the door opening speed or the door closing speed, and the control. The mechanism unit connects the second oil chamber (12b) and the first oil chamber (12a) to supply hydraulic oil from the second oil chamber (12b) to the first oil chamber (12a). The 1st speed flow path (42) and the DA flow path (43) for circulating are provided so as to be in contact with and separate from the piston member (19), and the 1st speed flow path (12b) is provided from the 2nd oil chamber (12b). Between the hold-open start valve (41) that controls the flow of hydraulic oil to the DA flow path (43) and the second oil chamber (12b) and the first speed flow path (42). A hold open release valve (44) that permits or stops the flow of hydraulic oil from the second oil chamber (12b) to the first speed flow path (42) by being provided, and the DA flow path (43). It is provided in the connecting flow path (45) connecting the first speed flow path (42), always stops the flow of hydraulic oil in the connecting flow path (45), and is in the DA flow path (43). When the internal pressure of the hydraulic oil becomes higher than a predetermined value, the hydraulic oil is allowed to flow from the DA flow path (43) to the first speed flow path (42) via the connection flow path (45). It is characterized by including a possible DA oil leakage prevention valve (46).

Further, in the floor hinge (10) according to the present invention, the flow path closing elastic member (22) can be arranged at the contact point of the piston member (19) with the hold open start valve (41).

According to the present invention, the DA section and the 1st speed section can be clearly switched by preventing the hydraulic oil from flowing out from the DA section from the moment when the DA section is switched to the 1st speed section. It is possible to provide a floor hinge that allows the door to close at the originally adjusted speed.

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 front view of the floor hinge, and the sectional drawing (b) is in the sectional drawing (a). AA cross section is shown. It is a figure for demonstrating the operation of the floor hinge when both the 1st speed flow path on-off valve and the DA flow path on-off valve of the floor hinge which concerns on this embodiment are fully open state, and especially when the door is fully open state. Shows the floor hinges of. It is a figure for demonstrating the operation of the floor hinge when both the 1st speed flow path on-off valve and the DA flow path on-off valve of the floor hinge which concerns on this embodiment are fully open, and in particular, the door closes. The floor hinge is shown when the contact between the urethane rubber and the hold-open start valve is started. It is a figure for demonstrating the operation of the floor hinge when both the 1st speed flow path on-off valve and the DA flow path on-off valve of the floor hinge which concerns on this Embodiment are in a fully open state, and in particular, further from the state of FIG. The floor hinge when the door closing operation is advanced is shown. It is a figure for demonstrating the operation of the floor hinge when both the 1st speed flow path on-off valve and the DA flow path on-off valve of the floor hinge which concerns on this Embodiment are in a fully open state, and in particular, the door is in a fully closed state. It shows the floor hinge when it becomes. It is a figure for demonstrating the operation of the floor hinge when the 1st speed flow path on-off valve of the floor hinge which concerns on this embodiment is in a fully open state, while the DA flow path on-off valve is in a fully closed state. Shows the floor hinges when the door is fully open. It is a figure for demonstrating the operation of the floor hinge when the 1st speed flow path on-off valve of the floor hinge which concerns on this embodiment is in a fully open state, while the DA flow path on-off valve is in a fully closed state. The floor hinge is shown when the door is closed and the contact between the urethane rubber and the hold open start valve is started. It is a figure for demonstrating the operation of the floor hinge when the 1st speed flow path on-off valve of the floor hinge which concerns on this embodiment is in a fully open state, while the DA flow path on-off valve is in a fully closed state. The floor hinge when the door closing operation is further advanced from the state of FIG. 7 is shown. It is a figure for demonstrating the operation of the floor hinge when the 1st speed flow path on-off valve of the floor hinge which concerns on this embodiment is in a fully open state, while the DA flow path on-off valve is in a fully closed state. Shows the floor hinges when the door is fully closed.

Hereinafter, preferred 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 FIG. Here, FIG. 1 is a diagram for explaining a specific configuration of the floor hinge according to the present embodiment, and the sectional view (a) in the drawing shows a front view of the floor hinge, and the sectional view (b) is shown. Shows the AA cross section in the fractional diagram (a). Note that FIG. 1 is a view showing the state of the floor hinge 10 when the door is fully opened.

The floor hinge 10 according to the present embodiment includes 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 parallelepiped 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 embedding 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 FIG. 1), a rotating shaft 14 which 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.

A cam follower 16 is arranged at a position on the left side of the paper surface in FIG. 1 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 reciprocating in the hinge case 11 in the left-right direction of the paper surface in FIG. It is configured to do.

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 on 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. 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 opened as shown in FIG. 1, the piston member 19 is arranged at a position where the pressure oil chamber 12b, which is the second oil chamber, is widest, and the hydraulic oil, which is the first oil chamber. The chamber 12a will be arranged at the narrowest position. Further, as the door (not shown) is closed from the fully open state and the door opening angle becomes smaller, the piston member 19 moves in the direction of narrowing the oil pressure chamber 12b, which is the second oil chamber, and the first It will move in the direction of expanding the hydraulic oil chamber 12a, which is the oil chamber.

Further, the piston member 19 according to the present embodiment is provided with a check valve 20, a forced closing valve 21, and urethane rubber 22 as an elastic member for closing the flow path. The check valve 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 the reverse hydraulic oil flow. It is a valve body having a function of stopping. Therefore, when the door (not shown) is closed from the fully open state shown in FIG. 1, the piston member 19 moves in the oil chamber 12 from the left side to the right side of the paper surface in FIG. 1, but at this time, the check valve 20 Does not allow the distribution of hydraulic oil. On the other hand, the door (not shown) opens from the fully closed state, the piston member 19 moves in the oil chamber 12 from the right side to the left side of the paper surface in FIG. 1, and the door opens until the fully opened state shown in FIG. When this is done, the check valve 20 allows the hydraulic oil to flow from the first oil chamber, the hydraulic oil chamber 12a, to the second oil chamber, the pressure oil chamber 12b, so that the piston member 19 is configured so as not to prevent it from moving in the oil chamber 12.

The forced closing valve 21 is a valve body that operates when an abnormal hydraulic pressure is generated with respect to the hydraulic oil in the oil chamber 12, such as when the control mechanism unit described later does not function, and the floor hinge 10 according to the present embodiment. It is a member that exerts a function as a safety device in.

The urethane rubber 22 as the elastic member for closing the flow path is arranged at a position where it comes into contact with the hold open start valve 41 described later. The hold-open start valve 41, which will be described later, is a member that is provided so as to be in contact with and detachable from the piston member 19 and has a penetrating cavity for flowing hydraulic oil. , It is configured to securely close the penetrating cavity and prevent the flow of hydraulic oil in this penetrating cavity.

On the other hand, the embedding member 13 and the hinge case 11 are formed with a control mechanism unit according to the present embodiment. The control mechanism unit according to the present embodiment is the amount of hydraulic oil that moves between the hydraulic oil chamber 12a, which is the first oil chamber, and the pressure oil chamber 12b, which is the second oil chamber, due to the reciprocating movement of the piston member 19. By adjusting the above, 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. Explaining the specific configuration thereof, the control mechanism unit according to the present embodiment connects the pressure oil chamber 12b which is the second oil chamber and the hydraulic oil chamber 12a which is the first oil chamber to the second oil chamber. The first speed flow path 42 and the DA flow path 43 for flowing hydraulic oil from the pressure oil chamber 12b to the hydraulic oil chamber 12a, which is the first oil chamber, are provided so as to be in contact with and detachable from the piston member 19. A hold-open start valve 41 that controls the flow of hydraulic oil from the pressure oil chamber 12b, which is the second oil chamber, to the first speed flow path 42 and the DA flow path 43, and the pressure oil chamber 12b, which is the second oil chamber. A hold-open release valve 44, which is provided between the first-speed flow path 42 and allows or stops the flow of hydraulic oil from the pressure oil chamber 12b, which is the second oil chamber, to the first-speed flow path 42, and a DA flow. It is provided in the connecting flow path 45 that connects the path 43 and the first speed flow path 42, always stops the flow of hydraulic oil in the connecting flow path 45, and the internal pressure of the hydraulic oil in the DA flow path 43 becomes equal to or higher than a predetermined value. It is configured to include a DA oil leakage prevention valve 46 that allows the flow of hydraulic oil from the DA flow path 43 to the first speed flow path 42 via the connection flow path 45 when the height becomes high.

Each of the 1-speed flow path 42 and the DA flow path 43 is provided with a 1-speed flow path on-off valve 42a and a DA flow path on-off valve 43a in the flow path, and the 1-speed flow path on-off valve 42a and the DA flow path on-off valve 42a and the DA flow path on-off valve are opened and closed. By opening and closing the valve 43a, it is possible to allow or stop the flow of hydraulic oil in the 1st speed flow path 42 and the DA flow path 43. The opening / closing operation of the 1-speed flow path on-off valve 42a and the DA flow path on-off valve 43a can be performed by using a tool such as a screwdriver from the outside of the hinge case 11 to open or close each on-off valve in advance. Will be set.

As described above, the hold-open start valve 41 is a member having a penetrating cavity. As shown in FIG. 1, when the door is not in contact with the piston member 19 in the fully open state and the penetrating cavity is not closed, the elastic force exerted by the coil spring of the hold open start valve 41 acts. The hold-open start valve 41 is maintained in a state of protruding toward the pressure oil chamber 12b, which is the second oil chamber (that is, to the left of the paper surface in FIG. 1). As described above, in the state shown in FIG. 1, the hold-open start valve 41 is arranged at a position that obstructs the flow of hydraulic oil to the 1st speed flow path 42, and the hydraulic oil flows to the DA flow path 43. Is placed in a position that allows. Therefore, in the state shown in FIG. 1, the hold-open start valve 41 passes from the pressure oil chamber 12b, which is the second oil chamber, through the penetrating cavity of the hold-open start valve 41, and the DA flow path 43. It is configured to allow the distribution of hydraulic oil to.

Next, when the piston member 19 moves to the right of the paper surface in FIG. 1 and the urethane rubber 22 comes into contact with the hold-open start valve 41 by performing the door closing operation from the fully open state of the door, the elastic force of the urethane rubber 22 acts. The penetrating cavity of the hold-open start valve 41 is surely closed, and the hydraulic oil cannot flow in the penetrating cavity. When the piston member 19 further moves in the direction of narrowing the region of the pressure oil chamber 12b, which is the second oil chamber, from the state where the contact between the urethane rubber 22 and the hold open start valve 41 is started, the hold open start valve 41 is shown in FIG. It moves to the right of the paper surface in No. 1 and stops the flow of hydraulic oil to the DA flow path 43.

The hold-open release valve 44 always distributes hydraulic oil from the pressure oil chamber 12b, which is the second oil chamber, to the first-speed flow path 42 due to the action of the elastic force exerted by the coil spring of the hold-open release valve 44. It has the effect of stopping. However, when the pressure of the hydraulic oil in the pressure oil chamber 12b, which is the second oil chamber, increases and this pressure exceeds the elastic force of the coil spring of the hold open release valve 44, the hold open release valve 44 is configured to move the valve body to the right of the paper surface in FIG. 1 to allow the flow of hydraulic oil from the pressure oil chamber 12b, which is the second oil chamber, to the first speed flow path 42.

The DA oil leakage prevention valve 46 is the hydraulic oil of the connection flow path 45 that always connects the DA flow path 43 and the first speed flow path 42 by the action of the elastic force exerted by the coil spring of the DA oil leakage prevention valve 46. It has the effect of stopping the distribution of oil. However, when the pressure of the hydraulic oil in the DA flow path 43 increases and this pressure exceeds the elastic force of the coil spring of the DA oil leakage prevention valve 46, the DA oil leakage prevention valve 46 presses the valve body. It is configured to move to the left of the paper surface in FIG. 1 to open the connecting flow path 45 and allow the flow of hydraulic oil from the DA flow path 43 to the first speed flow path 42.

Here, a stopper-shaped portion (not shown) is formed on the inner wall surface of the hinge case 11 forming the oil chamber 12. The stopper-shaped portion 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 main spring 31, which is an elastic member that constantly exerts an urging force in a constant direction on the piston member 19, is arranged between the stopper-shaped portion and the piston member 19. That is, in the main spring 31 according to the present embodiment, the coil end on the left side of the paper surface in FIG. 1 is in contact with the stopper-shaped portion, and the coil end on the right side in FIG. 1 is in contact with the piston member 19. Therefore, the piston member 19 is configured to be constantly pressed toward the right side of the paper surface in FIG. The direction of the urging force exerted by the main 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) is subjected to a load. It is a mechanism that constantly exerts a constant force.

Further, in the floor hinge 10 according to the present embodiment, a stopper pin (not shown) is installed on the rod member 18, and is a second elastic member sandwiched between the stopper pin and the piston member 19. The inner spring 32 is installed. The inner spring 32 according to the present embodiment is a member arranged on the inner diameter side of the main spring 31. When the door is fully closed, the position of the stopper pin fixedly installed on the rod member 18 is configured to be located closer to the piston member 19 than the position of the stopper-shaped portion formed on the inner wall surface of the hinge case 11. Has been done. Therefore, when the door is fully closed, one end side of the inner spring 32 (left side of the paper surface in FIG. 1) is contact-held by the stopper pin, and the other end side of the inner spring 32 (right side of the paper surface in FIG. 1) is the piston member 19. Since the contact is held by the inner spring 32, the elastic force exerted by the inner spring 32 is exerted only on the piston member 19 alone, and the urging force thereof is not exerted on the outside of the piston member 19.

However, when the door (not shown) opens from a fully closed angle, the rod member 18 moves toward the left side of the paper surface in FIG. 1, and the position of the stopper pin is a stopper shape formed on the inner wall surface of the hinge case 11. When the inner spring 32 is located closer to the anti-piston member 19 than the position of the portion, one end side of the inner spring 32 (left side of the paper surface in FIG. 1) is contact-held by the stopper-shaped portion, and the other end side of the inner spring 32 (right side of the paper surface in FIG. 1). Is held in contact with the piston member 19, so that the urging force of the inner spring 32 presses the piston member 19 toward the right side of the paper surface in FIG. 1 in the same manner as the main spring 31. That is, when a door (not shown) is opened from a fully closed state to a predetermined opening angle, the main spring 31 applies a load to the opening operation, and further, a fully opening angle is applied from the predetermined opening angle. When the door opening operation up to is performed, the main spring 31 and the inner spring 32 cooperate to exert a load on the door (not shown), so that the door is fully opened from the predetermined opening angle of the door (not shown). A floor hinge 10 capable of suitably exhibiting a back check function for delaying the door opening speed during the door opening operation up to this point has been realized.

That is, in the floor hinge 10 according to the present embodiment, the inner spring 32 is located between the stopper pin and the piston member 19 during the door opening operation from the fully closed angle to the predetermined opening angle of the door (not shown). As a result, the inner spring 32 does not exert an urging force acting on the reciprocating movement of the piston member 19 in the oil chamber 12, and the inner spring 32 is in the door opening operation from a predetermined opening angle to the fully opening angle of the door (not shown). By being located between the stopper-shaped portion formed on the inner wall surface of the hinge case 11 and the piston member 19, an urging force acting on the reciprocating movement of the piston member 19 in the oil chamber 12 is exerted. Therefore, the back check function that delays the door opening speed during the door opening operation from a predetermined door opening angle to the fully opened angle of the door (not shown) is exhibited.

In this embodiment, as shown in FIG. 1, the main spring 31 and the inner spring 32 are configured as coil springs, and the springs of the main spring 31 and the inner spring 32 are wound in reverse directions. Have been placed. By arranging the two coil springs so that the winding directions of the springs are opposite to each other, the two coil springs do not come into contact with each other when compressed, so that stable operation can be realized at all times. There is.

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 with reference to FIGS. 2 to 9.

[First operation example]
First, a first operation example of the floor hinge 10 according to the present embodiment will be described with reference to FIGS. 2 to 5. Here, FIGS. 2 to 5 are for explaining the operation of the floor hinge when both the 1-speed flow path on-off valve 42a and the DA flow path on-off valve 43a of the floor hinge according to the present embodiment are in the fully open state. In particular, FIG. 2 shows a floor hinge when the door is fully opened, and FIG. 3 shows a state in which the door is closed to start contact between the urethane rubber 22 and the hold open start valve 41. The floor hinge at the time of is shown, FIG. 4 shows the floor hinge when the door closing operation is further advanced from the state of FIG. 3, and FIG. 5 shows the floor hinge when the door is fully closed. Shows floor hinges.

In the case of the first operation example, when the operator releases the door with the door not shown in the fully open state, the door shifts to the door closing operation without maintaining the fully open state, and the door closing operation is slowly performed for a certain section. It will be executed by the DA section in which the door is closed and the 1st speed section in which the speed is changed at high speed when the door is closed. That is, when the operator releases the door from the fully open state of the door shown in FIG. 2, in the floor hinge 10 in the state shown in FIG. 2, the hold open start valve 41 is released from the pressure oil chamber 12b, which is the second oil chamber. Since the flow of the hydraulic oil to the DA flow path 43 is permitted via the penetrating cavity, the hydraulic oil in the pressure oil chamber 12b, which is the second oil chamber, is hindered from flowing. Instead, it moves to the hydraulic oil chamber 12a, which is the first oil chamber, via the penetrating cavity of the hold-open start valve 41 and the DA flow path 43. That is, the floor hinge 10 from the state shown in FIG. 2 to the state shown in FIG. 3 is executed in the DA section in which the door closing operation is slowly performed in a certain section.

When the door closing operation of the door (not shown) progresses and the floor hinge 10 according to the present embodiment is in the state shown in FIG. 3, the urethane rubber 22 comes into contact with the hold-open start valve 41, and therefore, due to the action of the elastic force of the urethane rubber 22. The penetrating cavity of the hold-open start valve 41 is surely closed by the urethane rubber 22, and the hydraulic oil cannot flow in the penetrating cavity. When the piston member 19 further moves in the direction of narrowing the region of the pressure oil chamber 12b, which is the second oil chamber, from the state shown in FIG. 3 when the contact between the urethane rubber 22 and the hold open start valve 41 is started, FIG. As shown, the hold-open start valve 41 moves to the right of the paper in FIG. At this time, the flow of the hydraulic oil in the hollow through the hold open start valve 41 becomes impossible, but the flow of the hydraulic oil to the DA flow path 43 is permitted, so that it is the second oil chamber. The internal pressure of the hydraulic oil in the pressure oil chamber 12b does not increase. Then, the hydraulic oil in the pressure oil chamber 12b, which is the second oil chamber, flows from the gap of the valve body of the hold-open start valve 41 through the connection flow path 45 above the paper surface in FIGS. It flows to 42, and the hydraulic oil is circulated to the hydraulic oil chamber 12a, which is the first oil chamber. Therefore, during the transition from the state of FIG. 3 to FIG. 4, the hydraulic oil in the pressure oil chamber 12b, which is the second oil chamber, is the hydraulic oil, which is the first oil chamber, via the first speed flow path 42. Since the door is distributed to the chamber 12a, the door (not shown) is closed by the 1st speed section in which the speed is changed at high speed when the door is closed. That is, in the floor hinge 10 that performs the first operation example, after the execution of the DA section that slowly closes the door for a certain section is stopped, the first speed section that shifts at high speed when the door is closed executes the execution. Since it will be started, it is possible to provide a floor hinge 10 in which the DA section and the 1st speed section are clearly switched and the door is closed according to the originally adjusted speed in the 1st speed section. At this time, the hold open release valve 44 and the DA oil leakage prevention valve 46 provided on the plug member 13 do not operate.

From the state in which the 1st speed section shown in FIG. 4 is executed to the fully closed state of the door shown in FIG. 5, in the floor hinge 10, the second oil chamber, the pressure oil chamber 12b, is in the 1st speed. Since only the hydraulic oil is allowed to flow to the hydraulic oil chamber 12a, which is the first oil chamber, via the flow path 42, the 1st speed section that shifts at high speed when the door is closed is surely executed. It will be. Then, by shifting to the state shown in FIG. 5, the door (not shown) is fully closed.

As described above, the first operation example performed by the floor hinge 10 according to the present embodiment has been described with reference to FIGS. 2 to 5. Next, another operation example of the floor hinge 10 according to the present embodiment will be described with reference to FIGS. 6 to 9.

[Second operation example]
A second operation example of the floor hinge 10 according to the present embodiment will be described with reference to FIGS. 6 to 9. Here, FIGS. 6 to 9 show the floor hinge in the case where the first-speed flow path on-off valve 42a of the floor hinge according to the present embodiment is in the fully open state, while the DA flow path on-off valve 43a is in the fully closed state. It is a figure for demonstrating the operation. In particular, FIG. 6 shows the floor hinge when the door is fully opened, and FIG. 7 shows the door closing operation of the urethane rubber 22 and the hold open start valve 41. The floor hinge when the contact is started is shown, FIG. 8 shows the floor hinge when the door closing operation is further advanced from the state of FIG. 7, and FIG. 9 shows the floor hinge when the door is fully closed. It shows the floor hinge when it is in the state.

In the case of the second operation example, when the door (not shown) is fully opened and the operator releases the door, the door is maintained in the fully opened state and stopped. The stopped state of the door is realized because the DA flow path on-off valve 43a is in the fully closed state. That is, in the floor hinge 10 in the state shown in FIG. 6, the hydraulic oil is supplied from the pressure oil chamber 12b, which is the second oil chamber, to the DA flow path 43 via the penetrating cavity of the hold open start valve 41. Although distribution is permitted, since the DA flow path on-off valve 43a installed in the DA flow path 43 is in a fully closed state, the hydraulic oil in the pressure oil chamber 12b, which is the second oil chamber, is It is not possible to move to the hydraulic oil chamber 12a, which is the first oil chamber. As a result, the fully open state of the door is maintained.

When the operator applies a closing force in the closing direction to a door (not shown) from the state of the floor hinge 10 in which the fully opened state of the door shown in FIG. 6 is maintained, the pressure at which the piston member 19 is the second oil chamber. Since the oil chamber 12b moves in the narrowing direction, the internal pressure of the hydraulic oil in the pressure oil chamber 12b rises. When the internal pressure rise of the hydraulic oil in the pressure oil chamber 12b reaches a certain pressure, the pressure acts on the hold open release valve 44 to move the valve body, and the pressure oil chamber 12b, which is the second oil chamber, moves. The flow of hydraulic oil to the 1st speed flow path 42 is permitted. From this moment, the 1st speed section will be executed. That is, when the floor hinge 10 that performs the second operation example performs the door closing operation from the state where the door is fully opened, the execution of the first speed section is started.

When the door closing operation by the 1st speed section of the door (not shown) progresses and the floor hinge 10 according to the present embodiment is in the state shown in FIG. 7, the urethane rubber 22 comes into contact with the hold open start valve 41, so that the elasticity of the urethane rubber 22 By the action of force, the penetrating cavity of the hold-open start valve 41 is surely closed by the urethane rubber 22. When the piston member 19 further moves in the direction of narrowing the region of the pressure oil chamber 12b, which is the second oil chamber, from the state shown in FIG. 7 when the contact between the urethane rubber 22 and the hold open start valve 41 is started, FIG. As shown, the hold-open start valve 41 moves to the right of the paper surface in FIG. 8 to increase the internal pressure of the hydraulic oil in the DA flow path 43.

Since the DA flow path on-off valve 43a is fully closed in the DA flow path 43, the internal pressure of the hydraulic oil in the DA flow path 43 continues to rise, and when the internal pressure rise reaches a certain pressure, the pressure is increased. The pressure acts on the DA oil leakage prevention valve 46 to move the valve body, and the flow of hydraulic oil from the DA flow path 43 to the first speed flow path 42 via the connection flow path 45 is permitted. If the DA oil leakage prevention valve 46 is not installed, it is expected that the hydraulic oil will leak from the plug member 13 due to the increase in the internal pressure of the hydraulic oil in the DA flow path 43. In the present embodiment, it is possible to reliably prevent the occurrence of problems such as hydraulic oil leakage by installing the DA oil leakage prevention valve 46.

From the operating state of the DA oil leakage prevention valve 46 shown in FIG. 8 to the fully closed state of the door shown in FIG. 9, in the floor hinge 10, the second oil chamber, the pressure oil chamber 12b, is in the first speed. Since only the hydraulic oil is allowed to flow to the hydraulic oil chamber 12a, which is the first oil chamber, via the flow path 42, the execution of the first speed section is continued. Then, by shifting to the state shown in FIG. 9, the door (not shown) is fully closed. In the state shown in FIG. 9, the DA oil leakage prevention valve 46 is released from the pressure applied from the hydraulic oil and returns to the initial state in which the valve body is closed.

In the case of the second operation example described above, when the door (not shown) is fully opened and the operator releases the door, the door is maintained in the fully opened state and stopped, and the door in such a fully opened state is stopped. When a door closing force was applied to the door, the door closing operation was executed in the 1st speed section. As described above, the floor hinge 10 according to the present embodiment is a floor hinge capable of performing various operations as in the first operation example and the second operation example. Then, as shown in the first operation example, the floor hinge 10 according to the present embodiment is configured so that the hydraulic oil does not flow out from the DA section from the moment when the DA section is switched to the 1st speed section. The DA section and the 1st speed section are clearly switched, and the door is closed at the originally adjusted speed in the 1st speed section. Further, as shown in the second operation example, the floor hinge 10 according to the present embodiment has a configuration in which problems such as hydraulic oil leakage do not occur. As for the floor hinge 10 when this second operation example is executed, since problems such as hydraulic oil leakage do not occur, a floor hinge that closes the door according to the originally adjusted speed in the 1st speed section is provided. Is possible.

Although the preferred embodiments of the present invention have been described above, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be made to the above embodiments. It is clear from the description of the claims that such modified or improved forms may also be included in the technical scope of the present invention.

10 floor hinges, 11 hinge cases, 12 oil chambers, 12a hydraulic oil chambers, 12b pressure oil chambers, 13 plugging members, 14 rotating shafts, 15 cam members, 16 cam followers, 17 slide plates, 18 rod members, 19 piston members, 20 Check valve, 21 Forced closure valve, 22 Urethane rubber, 31 Main spring, 32 Inner spring, 41 Hold open start valve, 42 1st speed flow path, 42a 1st speed flow path on-off valve, 43 DA flow path, 43a DA flow Road on / off valve, 44 hold open release valve, 45 connection flow path, 46 DA oil leakage prevention valve.

Claims (2)

A hinge case with an oil chamber filled with hydraulic oil and
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 on the side opposite to the slide plate connection side, and the oil chamber is divided into a first oil chamber and a second oil chamber and installed so as to be reciprocating in the oil chamber. Piston member and
An elastic member that constantly exerts a urging force in a certain direction on the piston member,
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 closing speed,
It is a floor hinge equipped with
The control mechanism unit
A first-speed flow path and a DA flow path that connect the second oil chamber and the first oil chamber to flow hydraulic oil from the second oil chamber to the first oil chamber.
A hold-open start valve that is provided so as to be in contact with and detachable from the piston member and controls the flow of hydraulic oil from the second oil chamber to the first speed flow path and the DA flow path.
A hold-open release valve provided between the second oil chamber and the first-speed flow path to allow or stop the flow of hydraulic oil from the second oil chamber to the first-speed flow path.
It is provided in the connecting flow path connecting the DA flow path and the first speed flow path, always stops the flow of hydraulic oil in the connecting flow path, and the internal pressure of the hydraulic oil in the DA flow path is equal to or higher than a predetermined value. A DA oil leakage prevention valve that permits the flow of hydraulic oil from the DA flow path to the first speed flow path via the connection flow path when the temperature rises to
A floor hinge characterized by being equipped with. In the floor hinge according to claim 1,
A floor hinge characterized in that an elastic member for closing a flow path is arranged at a contact point of the piston member with the hold open start valve.

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