JPH0547282U - Floor hinge - Google Patents

Abstract

(57) [Summary] [Purpose] A floor hinge that allows the door to be individually adjusted for delayed action-first speed closing operation-second speed closing operation-latching action closing operation. [Structure] The return movement of the piston 3 is changed to the fourth speed, and the output shaft 1
The closing door rotation is changed to the fourth speed. During the door opening operation, the hydraulic oil in the piston rear chamber 5 flows into the piston front chamber 4 through the first oil passage 7. During the delayed action, the hydraulic oil in the piston front chamber 4 flows to the piston rear chamber 5 only through the second oil passage 11 and the delayed action adjusting valve 9. During the first speed closing operation, the hydraulic oil in the piston front chamber 4 flows to the piston rear chamber 5 only through the second oil passage 11 and the first speed adjusting valve 10. During the second speed closing operation, the hydraulic oil in the piston front chamber 4 flows into the piston rear chamber 5 only through the third oil passage 15 and the second speed adjusting valve 13. During the latching action, the hydraulic oil in the piston front chamber 4 flows into the piston rear chamber 5 only through the third oil passage 15 and the latching action adjusting valve 14.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention inputs the door opening turning force to convert it into a linear motion of the piston, and moves the piston forward to store the return spring by the door opening operation, and stores the return force of the return spring. The piston is moved back by the action of the hydraulic control circuit, and the return speed of the piston is changed to the fourth speed by the action of the hydraulic control circuit, so that delayed action-first speed closing operation-second speed closing operation-latching action closing operation is performed on the door. Regarding floor hinges to be performed.

[0002]

[Prior Art]

 Conventionally, there is Japanese Patent Application No. 3-20680 as a floor hinge that causes a door to perform a delayed action-first-speed door closing operation-second-speed door closing operation-latching action involving a four-speed change of a latching action. In the floor hinge of the embodiment of Japanese Patent Application No. 3-20680, a back check adjusting valve and a latching action adjusting valve are provided in the first oil passage for ensuring the flow of the hydraulic oil in the piston rear chamber to the piston front chamber. At the same time, a delay action adjusting valve, a first speed adjusting valve and a second speed adjusting valve are provided in the second oil passage that ensures the flow of hydraulic oil in the piston front chamber to the piston rear chamber.

In the floor hinge of the embodiment of Japanese Patent Application No. 3-20680, the first speed adjusting valve and the second speed adjusting valve are arranged side by side facing the piston front chamber, so that even if each adjusting valve is adjusted. It was found that the first and second gears could not be adjusted individually because they interfered with each other.

The present invention has been devised in view of the above-mentioned point, and makes a door perform a door closing operation involving a four-speed change of delayed action-first speed door closing operation-second speed door closing operation-latching action. The purpose of the invention is to provide a floor hinge that is capable of individual adjustment of the four-speed change.

[0005]

Means for Solving the Problems The present invention is, as a means for solving the above problems, an output shaft 1 which is connected to a door and serves as a rotation shaft of the door, and a rotation-linear motion of the output shaft 1. It is connected by the motion conversion mechanism A, and is linearly moved by the rotation of the output shaft 1 by the door opening operation to store the return spring 2 and return by the stored return force of the return spring 2. The output shaft 1 has a piston 3 for transmitting the turning force in the closing direction, and the required hydraulic control circuit B causes the piston moving speed at the closing operation to be slightly slower than the fully opened state. Action, followed by a first-speed door closing operation that performs a high-speed door closing operation, a second-speed door closing operation that performs a slow-speed door closing operation, and then a high-speed door closing operation that closes the door and closes the door. Speed controlled floor In the hinge, the hydraulic control circuit B is provided in the piston 3 so as to connect the piston front chamber 4 and the piston rear chamber 5 to each other, and the piston front chamber of the hydraulic oil in the piston rear chamber 5 at the time of the door opening operation. 4 and a first oil passage 7 in which a check valve 6 is placed at a required position to stop the flow in the reverse direction when the door is closed, and in the cylinder wall during the delay door operation and the first speed door closing operation. Occasionally, as the piston 3 moves, a port closed by the piston 3 and a port opened are created, and the piston front chamber 4 and the piston rear chamber 5 are sequentially switched and communicated with each other in a required multi-way shape. The second oil passage 11 in which the cage delayed action adjusting valve 9 and the first speed adjusting valve 10 are distributed so as to face the piston front chamber 4 and the piston rear chamber 5, and the second speed closing inside the cylinder wall. Along with the movement of the piston 3 during operation and during the latching action, a port closed by the piston 3 and a port opened by the piston 3 are generated so that the piston front chamber 4 and the piston rear chamber 5 are sequentially switched and communicated with each other. The second speed adjusting valve 13 and the latching action adjusting valve 14 which are formed in a shape are provided with a third oil passage 15 which is distributed so as to face the piston front chamber 4 and the piston rear chamber 5. It provides a special floor hinge.

[0006]

[Action]

 Now, when the door is opened from the fully closed state, the output shaft 1 rotates, and the rotation-linear motion conversion mechanism A causes the piston 3 to move toward the piston rear chamber 5 while compressing the return spring 2. The door is moved, and the door is opened to a preset maximum opening angle (for example, 120 degrees). At this time, the check valve 6 in the first oil passage 7 is pushed open by the increase in pressure of the working oil in the piston rear chamber 5, so that the working oil in the piston rear chamber 5 flows through the first oil passage 7. Then, it moves to the piston front chamber 4, and the movement of the piston 3 is ensured. Next, when the door opening force is released from the state where the door is opened to the maximum door opening angle, the piston 3 is moved back toward the piston front chamber 4 by the stored energy restoring force of the returning spring 2. At this time, the check valve 6 in the first oil passage 7 is closed by the increase in the pressure of the hydraulic oil in the piston front chamber 4. Then, the hydraulic oil in the piston front chamber 4 passes through the second oil passage 11 and the delayed action adjusting valve 9 during a delay door operation (a section where the door opening angle is, for example, 120 degrees to 75 degrees). The piston can flow to the rear chamber 5, and then the second oil passage 11 and the first speed adjusting valve during the first speed door closing operation (section where the door opening angle is, for example, 75 degrees to 25 degrees). It can flow to the piston rear chamber 5 through 10 and then during the second speed closing operation (section where the opening angle is from 25 degrees to 5 degrees), the third oil passage 15 and the second oil passage 15 It can flow to the piston front chamber 4 through the speed control valve 13, and finally, during the latching action (section where the door opening angle is from 5 degrees to 0 degrees), the third oil passage 15, the latching Piston through action adjusting valve 14 It can flow to the clubroom 4. Therefore, the backward movement of the piston 3 becomes the fourth speed corresponding to the respective throttle ratios of the delayed action adjusting valve 9, the first speed adjusting valve 10, the second speed adjusting valve 13 or the latching action adjusting valve 14, It is transmitted through the rotation-linear motion conversion mechanism A so that the output shaft 1 is in a speed-returning return motion, and therefore the door is delayed action-first speed closing motion-second speed closing motion-latching action. Each of the operations will be sequentially performed.

[0007]

【Example】

 Hereinafter, embodiments of the floor hinge of the present invention will be described with reference to the drawings. This floor hinge is applicable to left-opening, right-opening, and left-right opening. This floor hinge has an output shaft 1 which is connected to a door and serves as a rotary shaft of the door, and a piston 3 which is connected to the output shaft 1 by a rotary-linear motion converting mechanism A using a cam mechanism. When the output shaft 1 is rotated by the door opening operation, the piston 3 is moved forward to store the return spring 2 and the return force of the return spring 2 causes the piston 3 to move back to rotate-linearly. It is configured to transmit the closing door turning force to the output shaft 1 via the motion mechanism A, and the piston moving speed during the closing operation is controlled by the hydraulic control circuit B so that the piston rear chamber 5 of the hydraulic oil in the piston front chamber 4 is moved. By controlling the flow amount to the door, the door closing speed is very slow in the door closing operation range of the maximum door opening angle of 120 degrees or the door opening angle of 75 degrees (door closing operation process from FIG. 2 (a) to FIG. 2 (b)). Do a delayed action, next In the door closing operation range of the door opening angle of 75 degrees to 25 degrees (the door closing operation process from FIG. 2B to FIG. 2C), the first door closing operation is performed at a high speed, and the door opening angle 25 is set. 2 to 5 degrees in the door closing operation range (the door closing process from FIG. 2 (c) to FIG. 2 (d)), the second speed door closing operation is performed to perform a slow door closing operation, and then the door opening angle is about to be fully closed. In the door closing operation range of 5 degrees to 0 degrees (the door closing operation process from FIG. 2 (d) to FIG. 2 (e)), the speed is controlled in the operation order of the latching action of performing the door closing operation at high speed and closing the door. In addition, in the door opening operation range of the door opening angle of 75 degrees to 120 degrees (the door opening operation process from FIG. 2B to FIG. 2A), the rotation-linear motion is performed. The conversion mechanism A contacts the back check piston 16 which is biased by the back check spring 17, and When the door is slowly opened, the back check piston 16 can compress the back check spring 17 and retract, so that the check valve 34 for back check cannot be closed, and the return movement of the piston 3 is guaranteed. The check valve 34 for back check is closed when opening the door quickly, so that the back check piston 16 does not retreat and the door is opened. When the door is strongly swung in the direction of full opening due to a strong wind, the back check hydraulic control circuit C having the back check safety valve 36 is used to back check the cylinder 19b. By relieving the hydraulic oil in the back chamber 5 to the piston rear chamber 5, the back check piston 16 is guaranteed to retreat. Is configured to avoid the burden of the fixed part of the force shaft 1 and the door.

The floor hinge includes a main body case 19. The body case 19 is horizontally long and has a flat cylinder having a cylinder 19a liquid-tightly closed by a cylinder head 20 on the right end side and a back check cylinder 19b liquid-tightly closed by a back check cylinder head 21 on the left end side in the figure. It is formed in a tubular shape, and further has an opening in an upper portion that is biased to the back check cylinder 19b, and the opening is liquid-tightly closed by a lid plate 22 in a state where the output shaft 1 is projected. The piston 3 is housed in the cylinder 19a, the back check piston 16 is housed in the back check cylinder 19b, the piston front chamber 4 is located between the piston 3 and the cylinder head, and the piston rear chamber 5 is located up to the back check piston 16. It is in communication. The output shaft 1 is supported by a bearing 18 provided on the bottom of the body case 19 and a bearing 23 provided on the cover plate 22, and a leaf-shaped cam 24 is fixed in the body case 19. The output shaft 1 has an outer end fitted to an arm lever (not shown) fixed to a lower end of a door (not shown). The cam 24 is sandwiched between an upper swing plate 25 and a lower swing plate 26, and the upper swing plate 25 and the lower swing plate 26 are provided with three cam followers 27, 28, 29. The connecting rod 30 is pivotally supported and is fixed by a set screw 38 across the base end of the connecting rod 30 at the end on the piston 3 side. The connecting rod 30 has its tip formed on the rear surface of the piston 3. A piston pin 37 is fitted and connected from the outside of the circumferential surface of the piston 3 by being fitted in the recess. The cam 24 is provided so that its apex faces the direction of the piston 3 and the apex coincides with the longitudinal direction of the main body case 19 when the door is fully closed, and among the three cam followers 27, 28, 29, The two cam followers 27, 28 are located closer to the back check piston 16 with respect to the cam 24, and are provided so as to contact both shoulders having the smallest diameter of the cam 24 when the door is fully closed. The follower 29 is provided so as to be spaced apart from the cam 24 toward the piston 3 by a required distance. Therefore, when the output shaft 1 is rotated left (or right) and the cam 24 is integrally rotated, one of the two cam followers 27, 28 near the back check piston 16 (or 28) is moved. The cam 3 is pushed in the direction of the back check piston 16 in contact with the cam 24, and the piston 3 moves in the direction of the back check piston 16 against the bias of the return spring 2. Thus, the rotation-linear motion conversion mechanism A that uses the cam and the cam follower to convert the rotation of the output shaft 1 into the linear motion of the piston 3 is configured. The return spring 2 is housed in the piston rear chamber 5 so as to surround the connecting rod 30, and pulls the piston 3 and the step 19c in the main body case 19 that are positioned so as to correspond to the fully closed state of the door. It is installed. The back check piston 16 is urged by a back check spring 17 housed in a compressed state in a back check cylinder 19b. An opening is provided in the lower bottom of the lower swing plate 26 of the main body case 19, a diaphragm packing 31 is applied to a downward step of the opening edge, and a cup-type plug 32 is screwed to be liquid-tight. It is sealed. The diaphragm packing 31 functions to prevent damage to the main body case 19 by denting when the hydraulic oil in the piston rear chamber 5 expands due to temperature rise. The main body case 19 is filled with hydraulic oil by turning the main body case 19 upside down and removing the cup-type plug 32 and the diaphragm packing 31.

The hydraulic control circuit B is provided with a piston 3 so that the piston front chamber 4 and the piston rear chamber 5 are communicated with each other, and a check valve 6 is arranged at a required position to ensure a door opening operation. The passage 7 and the delayed action that is bored in the cylinder wall in the required multi-way shape (maximum opening angle 120 degrees from FIG. 2 (a) to FIG. 2 (b) or door opening angle 75 degrees) Second oil passage 11 for ensuring the operation process) and the first-speed door closing operation (the door closing operation process of the door opening angle 75 to 25 degrees from FIG. 2B to FIG. 2C) and the cylinder wall A second-speed door closing operation (a closing operation process of a door opening angle of 25 degrees to 5 degrees from FIG. 2 (c) to FIG. 2 (d)) and a latching action (FIG. (D) to Fig. 2 (e) door opening angle 5 to 0 degrees. It has a third oil passage 15.

In the check valve 6 arranged in the first oil passage 7, the valve body 6 a is separated from the valve seat due to the increase in the pressure of the hydraulic oil in the piston rear chamber 5 during the door opening operation, and the check valve 6 in the piston rear chamber 5 is removed. It allows the hydraulic oil to flow to the piston front chamber 4 and stops the reverse flow when the door is closed.

The second oil passage 11 is formed in the cylinder wall in the form of a multi-passage consisting of a main passage 11a and four branch passages 11b, 11c, 11d, 11e, and a required position of the piston front chamber 4. To the oil ports a and b of the branch passages 11b and 11c, and the oil ports a'and b'of the branch passages 11d and 11e to the required positions of the piston rear chamber 5, and the door opening angle is 120 degrees to 75 degrees. In case of delayed action, the oil ports a and a'communicate, the oil port b'is closed by the piston 3 and the oil ports b and b'cannot be communicated, and the door opening angle is 75 degrees to 25 degrees. During the first-speed closing operation, the oil ports b and b'communicate, the oil port a is closed by the piston 3, and the oil ports a and a'are in a non-communication state. A delay action adjusting valve 9 is provided so as to be adjustable from the outside facing the oil port a ′, and a first speed adjusting valve 10 is provided so as to be adjustable from the outside facing the oil port b. The first speed adjusting valves 10 are distributed so as not to interfere with each other. The delay action adjusting valve 9 is adjusted to a required large degree of throttle, and the first speed adjusting valve 10 is adjusted to a small degree of throttle.

The third oil passage 15 has a main passage 15a and four branch passages 15b, 15c in the cylinder wall, similar to the second oil passage 11 during the second speed closing operation and the latching operation in the cylinder wall. , 15d, 15e are formed in a multi-passage shape deviating from the cylinder head rather than the second oil passage 11, and the oil ports c, d of the branch passages 15b, 15c are provided at required positions in the piston front chamber 4. And when the oil ports c ′, d ′ of the branch passages 15d, 15e are exposed at the required positions of the piston rear chamber 5 and the door opening angle is 25 ° to 5 ° during the second speed door closing operation, The ports c and c'communicate, the oil port d'is closed by the piston 3 and the oil ports d and d'cannot be communicated, and when the door opening angle is 5 degrees to 0 degrees, the oil is Ports d and d'communicate, oil port c is piston 3 Then, the oil ports c and c'are closed. The second speed adjustment valve is provided so as to be adjustable from the outside so as to face the oil port c ′, and the latching action adjustment valve 14 is provided so as to be adjustable from the outside so as to face the oil port d. 13 and the latching action control valve 14 are distributed so as not to interfere with each other. The second speed adjustment valve 13 is adjusted to a required large degree, and the latching action adjustment valve 14 is adjusted to a small degree.

A back check piston 16 is slidably fitted in the back check cylinder 19b, and the back check piston 16 is biased toward the output shaft 1 by a back check spring 17 provided in the back check cylinder 19b. A fourth oil passage 33 is formed in the back check piston 16, and a check valve 34 for back check is arranged in the fourth oil passage 33. When the pressure in the back check cylinder 19b becomes higher than the pressure in the piston rear chamber 5, the back check check valve 34 is closed by closing the valve seat on the valve seat. Of the piston to the rear chamber 5, and when the pressure in the back check cylinder 19b and the pressure in the piston rear chamber 5 are in equilibrium, the valve element separates from the valve seat and opens to open the back check cylinder. The hydraulic oil in 19b is allowed to flow to the piston rear chamber 5, and the back check piston 16 is retired. A fifth oil passage 35 is bored in the wall of the back check cylinder 19b, and a back check safety valve 36 is arranged in the fifth oil passage 35. In the back check safety valve 36, a spherical valve body 36c is seated on a valve seat by a bias of a coil spring 36b compressed by a screw plug 36a which can be adjusted by twisting operation from the outside, and a fifth oil passage 35 is formed. Is closed and the valve is opened when the pressure of the back check cylinder 19b exceeds a certain pressure.

Next, the operation of the floor hinge of the embodiment configured as described above will be described. Now, when the door is opened from the fully closed state, the output shaft 1 rotates and the rotation-linear motion mechanism A causes the piston 3 to move in the direction of the piston rear chamber 5 while compressing the return spring 2. , The door is opened to a preset maximum opening angle (for example, 120 degrees). At this time, the check valve 6 in the first oil passage 7 is pushed open by an increase in the pressure of the hydraulic oil filled in the piston rear chamber 5, so that the hydraulic oil filled in the piston rear chamber 5 is released. It flows through the first oil passage 7 and moves to the piston front chamber 4, thereby ensuring the movement of the piston 3 toward the piston rear chamber 5. Next, when the door opening force is released from the state where the door is opened at the maximum door opening angle, the piston 3 is returned by the stored energy restoring force of the return spring 2. At this time, the check valve 6 in the first oil passage 7 is closed due to an increase in pressure of the hydraulic oil filling the piston front chamber 4. The hydraulic oil in the piston front chamber 4 communicates only between the oil ports a and a ′ of the second oil passage 11 during the delayed action (section where the door opening angle is from 120 degrees to 75 degrees). As a result, the piston enters from the oil port a through the delayed action adjusting valve 9 that is located in the second oil passage 11 through the oil port a and faces the oil port a ′ and adjusts the throttling degree to a required degree. It can flow to the chamber 5, and then, during the first-speed door closing operation (section where the door opening angle is, for example, 75 degrees to 25 degrees), only between the oil ports b and b'of the second oil passage 11. Are in communication with each other, so that the second oil passage 11 enters through the second oil passage 11 through the oil port b and passes through the first speed adjusting valve 10 that adjusts the throttling degree provided facing the oil port b to a required small degree. Can flow to the piston rear chamber 5 from the oil port b'of During the second-speed door closing operation (the opening angle is, for example, a section from 25 degrees to 5 degrees), only the oil ports c and c ′ of the third oil passage 15 are in a communication state. It is possible to flow into the piston front chamber 4 from the oil port c'through the second speed adjusting valve 13 which enters into the third oil passage 15 and faces the oil port c ', and which adjusts the degree of throttling to a required degree. Lastly, during the latching action (section where the door opening angle is, for example, 5 degrees to 0 degrees), the degree of throttling provided from the oil port d into the third oil passage 15 and facing the oil port d. Through the latching action control valve 14 that is adjusted to a small value, and can flow from the oil port d'to the piston front chamber 4. Therefore, the backward movement of the piston 3 becomes the fourth speed corresponding to the throttle degree of each of the delay action adjusting valve 9, the first speed adjusting valve 10, the second speed adjusting valve 13 or the latching action adjusting valve 14. Thus, the door is transmitted via the rotation-linear motion mechanism A so that the output shaft 1 is returned to the gear-shift return rotation. Therefore, the door has a low speed delayed action-the speed is high, the first-speed door closing operation-the speed is low. Second-speed door closing operation-Each operation of the latching action with a large speed is sequentially performed.

Next, the back check operation that operates in the door opening operation range of the door opening angle of 75 degrees to 120 degrees will be described. In the opening operation range where the door is opened from the fully closed state and the opening angle is 75 degrees, the upper swing plate 25 and the lower swing plate 26 are not in contact with the back check piston 16 and the back check cylinder The pressure of the piston rear chamber 5 is transmitted to the inside of 19b through the fourth oil passage 33 formed in the back check piston 16. When the door is opened to the door opening angle of 75 degrees, the back rocking piston 16 receives the bias of the back check spring 17 on the upper rocking plate 25 and the lower rocking plate 26. Pushing starts against the force. In this case, when the door is opened slowly, the back check check valve 34 remains open, and the hydraulic oil in the back check cylinder 19b passes through the fourth oil passage 33 and the back check check valve 34 and the rear portion of the piston. Since it can flow into the chamber 5 and the back check piston 16 can compress the back check spring 17 and retreat, the check valve 34 for back check cannot be closed. Open to. Further, when the door opening speed is increased, the pressure of the hydraulic oil in the back check cylinder 19b increases to immediately react to the fact that the retreat speed of the back check piston 16 increases. The check valve 34 will close. For this reason, the back check piston 16 does not retreat due to the pressure of the hydraulic oil in the back check cylinder 19b, so the piston 3 slows down the returning speed and stops, so that the door opening operation stops and the quick opening of the door is performed. It is possible to avoid damage to the glass and other parts provided on the door. If the operator tries to open the door slowly, the pressure of the hydraulic oil in the back check cylinder 19b and the pressure of the hydraulic oil in the piston rear chamber 5 balance and the check valve 34 for back check opens again. This guarantees the retirement of the back check piston 16. In the backcheck state, if an attempt is made to open the door abruptly or if the wind blows the door in the direction of full opening, the backcheck piston 16 should react quickly to the increased retreat speed. Then, the pressure of the hydraulic oil in the back check cylinder 19b increases and the back check check valve 34 provided in the back check piston 16 closes. When the pressure of the hydraulic oil in the back check cylinder 19b exceeds a certain value, the hydraulic oil in the back check cylinder 19b is discharged into the fifth oil passage 35 and the fifth oil passage 35 formed in the wall of the back check cylinder 19b. It escapes to the piston rear chamber 5 through the back check safety valve 36 provided in the oil passage 35, and ensures that the back check piston 16 is retired even though the check valve 34 for back check is closed. As a result, it is possible to reduce the back check force and avoid the burden on the fixed portion of the output shaft 1 and the door, and to avoid damage to the floor hinge constituent parts such as the hinge case and the door member.

[0016]

As described above, according to the floor hinge of the present invention, when the door is opened, the hydraulic oil in the rear chamber of the piston flows to the front chamber of the piston through the first oil passage provided in the piston, and the door is closed. During the delayed action in the first stage of, the hydraulic oil in the front chamber of the piston flows to the rear chamber of the piston only through the second oil passage provided in the cylinder wall and the delayed action adjusting valve, and then in the second stage of the closing operation. During the first-speed closing operation, the hydraulic oil in the front chamber of the piston flows to the rear chamber of the piston only through the second oil passage provided in the cylinder wall and the first-speed adjustment valve, and then in the third stage of the closing operation. During the second speed door closing operation, the hydraulic oil in the front chamber of the piston flows to the rear chamber of the piston only through the third oil passage provided in the cylinder wall and the second speed adjusting valve. Therefore, during the fourth stage of the latching action of the door closing operation, the hydraulic oil in the piston front chamber is configured to flow to the piston rear chamber only through the third oil passage provided in the cylinder wall and the latching action adjustment valve. , Door can be delayed door operation-First speed door closing operation-Second speed door closing operation-Latching action can be performed with door closing operation accompanied by four speed changes, and especially the four speed changes can be adjusted individually, achieving the initial objective. it can.

[Brief description of drawings]

1A is a horizontal cross-sectional plan view of a floor hinge according to an embodiment of the present invention, and FIG. 1B is a vertical sectional front view.

FIG. 2 (a) shows a door opening angle of 120 degrees (when the door is fully opened =
The plan view of the horizontal cross section at the time of starting the delayed action), and (b) is the plan view of the horizontal cross section at the door opening angle of 75 degrees (when the first-speed door closing operation starts = the back check starts in the door opening direction). Figure, (c) is a horizontal sectional plan view when the door opening angle is 25 degrees (second speed closing operation), and (d) is a horizontal section when the door opening angle is 5 degrees (at the start of the latching action). The plan view (e) is a horizontal cross-sectional plan view in the fully closed state.

FIG. 3 is a sectional view taken along line III-III in FIG.

FIG. 4 is a sectional view taken along the line IV-IV in FIG.

5 is a cross-sectional view taken along line VV in FIG.

FIG. 6 is a sectional view taken along line VI-VI in FIG.

FIG. 7 is a sectional view taken along line VII-VII in FIG.

[Explanation of symbols]

 1 Output shaft A Rotation-linear motion conversion mechanism 2 Return spring 3 Piston B Hydraulic control circuit 4 Piston front chamber 5 Piston rear chamber 6 Check valve 7 First oil passage 9 Delayed action adjusting valve 10 First speed adjusting valve 11 2nd oil passage 13 2nd speed adjustment valve 14 Latchin action adjustment valve 15 3rd oil passage

Claims (1)

[Scope of utility model registration request] 1. An output shaft, which is connected to a door and serves as a rotary shaft of the door, and a rotary-linear motion converting mechanism, which is connected to the output shaft, and which is linear when the output shaft is rotated by a door opening operation. It has a piston that is moved to store the return spring, stores the return spring by the stored return force of the return spring, and transmits the turning force in the door closing direction to the output shaft. The required hydraulic control circuit closes the door. When the piston moving speed is slower than the fully open state, the delayed action performs the closing operation, the first speed closing operation performs the high speed closing operation, the second speed closing operation performs the slow closing operation, and then the full closing operation. In a floor hinge whose speed is controlled in the order of operation of a latching action that closes the door at high speed and closes the door, the hydraulic control circuit connects the piston to the piston front chamber and the piston rear chamber. The first oil has a check valve located at the required position that allows the hydraulic oil in the rear chamber of the piston to flow to the front chamber of the piston when the door is opened and stops the flow in the opposite direction when the door is closed. In the passage and the cylinder wall, a port that is closed by the piston and a port that is opened are generated along with the movement of the piston during the delayed action and the first-speed closing operation, and the piston front chamber and the piston rear chamber are sequentially switched and communicated. As shown in the figure below, the delayed action control valve and the first speed control valve are bored in the required multi-channel shape, and are distributed so as to face the piston front chamber and the piston rear chamber, and in the cylinder wall. With the movement of the piston at the time of the second speed closing operation and the latching action, a port closed by the piston and a port opened are generated to form a piston front chamber. It is drilled in the required multi-way shape so as to sequentially communicate with the rear chamber of the piston, and the second speed control valve and the latching action control valve are distributed so as to face the front chamber of the piston and the rear chamber of the piston. A floor hinge comprising three oil passages.