JPH0592379U - Door opening control device - Google Patents

Abstract

(57) [Abstract] [Purpose] If there are people on both sides of the door when the door is closed, the piston that moves with the opening and closing of the door will be locked and the door cannot be opened. A door opening control device that can avoid the danger of hitting the door when it is opened, and can open the door in the same manner as usual when either one of the people leaves the front of the door. [Structure] The piston 4 stores and moves the return spring 3 by the door opening rotation of the output shaft 1 that rotates with the opening and closing of the door D, and the piston 4 returns and moves by the stored return force of the return spring 3. In the door opening control device in which the output shaft 1 is rotated to close the door and the movement of the piston is controlled by the hydraulic pressure control circuit 6, the oil forward path 6a that causes the working oil in the piston front chamber R1 to flow to the piston rear chamber R2. In addition, a solenoid valve 8 is installed which is energized and closed when a person is present on both sides of the door.

Description

[Detailed description of the device]       [0001]     [Industrial applications]   The present invention uses a hydraulic circuit to control the moving speed of the piston that moves with the opening and closing of the door. The present invention relates to a door opening control device such as a door closer that is controlled.       [0002]     [Prior Art]   Conventionally, when there are people on both sides of the door in the closed state, the piston that moves with the opening and closing of the door Door opening control devices such as door closers that lock and lock the door cannot be opened are provided. Absent. Conventionally, the direction of door opening is controlled using a hydraulic device (cylinder and circuit). As a method of doing so, Japanese Patent Laid-Open No. 62-107184 discloses "back check of door closer. Device "," Speed control cylinder for automatic opening / closing door "of Jitsukai Sho 58-72367, etc. The structure of is devised. Also, install a solenoid valve in the hydraulic circuit to open the door. It is generally known to hold loose.       [0003]     [Problems to be solved by the device]   The present invention has been devised in view of the above-mentioned points, and a pi that moves as the door is opened and closed. Ton moving speed is controlled by hydraulic circuit such as door closer In the door opening control device, if there are people on both sides of the door when the door is closed, the piston will be locked. Once it becomes impossible to open the door and if it suddenly opens, it will hit the person on the side where the door will open. You can avoid the danger of opening, and if either person leaves the front of the door, you can open it as usual. The purpose of the present invention is to provide a door opening control device.       [0004]     [Means for Solving the Problems]   The present invention, as a means for solving the above problems, is accompanied by opening and closing the door D. The moving piston 4 and the inside of the piston front chamber R1 with the movement of the opening door of the piston 4 Drilled in the wall of the cylinder 5 to allow the hydraulic oil to flow to the piston rear chamber R2. Along with the movement of the oil outward path 6a and the closing door of the piston 4, the working oil in the piston rear chamber R2 is In the wall of the cylinder 5 or in the piston 4 so as to flow to the piston front chamber R1 And a hydraulic control circuit 6 including an oil return path 6b having a check valve 7 formed therein, Door opening control in which the movement of the piston is controlled by the hydraulic control circuit 6 In the device, the hydraulic control circuit 6 has people on both sides of the door in the middle of the oil outward path 6a. A solenoid valve 8 which is energized and closed at times is installed to open the valve. A door control device is provided.       [0005]     [Action]   If there are people on both sides of the door when the door is closed, the solenoid valve 8 will close and The hydraulic oil in the chamber R1 can flow to the piston rear chamber R2 through the oil outward passage 6a. The piston cannot move and the door cannot be opened because the piston is locked. You can avoid the risk of hitting someone on the side where the door is opened. And which When one person leaves the front of the door, the solenoid valve 8 returns to the open state, The hydraulic oil in the ton front chamber R1 flows to the piston rear chamber R2 through the oil outgoing path 6a, and Stone moves and can open the door as usual.       [0006]     【Example】   The following is implementation of the door opening control device of the present invention (a door closer is applied as a specific example) An example will be described with reference to the drawings. First, FIGS. 1 (a) and 1 (b) show the door opening control of the present invention. It relates to the first embodiment of the device and is the embodiment contained in claim 1. In Figure 1 (a) The door opening control device A is attached to the door D, and is fixed to the output shaft 1 of the door opening control device A. The fixed arm B is linked to the bracket F attached to the door frame via the link L. A spring built in that the output shaft 1 rotates when the door D is opened and closed. The door closing force is stored in 3. Upper and outer surfaces of door D (or door frame) In the upper part, a pair of people detection such as an infrared sensor that can detect people near the door D Sensors C and C are attached, and a pair of human detection sensors C and C are connected via an AND circuit. Turns on / off the power supply circuit of the solenoid valve 8 attached to the door opening control device A. It is like this.       [0007]   FIG. 1B is a vertical sectional view of a door opening control device (door closer) A, and a door D is opened. At this time, the output shaft 1 rotates and the rack and pinion mechanism 2 (rotation-linear motion converter) The piston 4 moves in the cylinder 5 to the right in the figure by the The spring 3 for storing the energy is stored and the spring 3 for returning returns to the leftward direction in the drawing. The piston 4 for transmitting the rotational force in the closing direction to the output shaft 1 and the opening of the piston 4. As the door moves, the hydraulic oil in the piston front chamber R1 may flow to the piston rear chamber R2. Oil passage 6a and pistol formed in the wall of the cylinder 5 and in the plug 8a so that The hydraulic oil in the piston rear chamber R2 flows to the piston front chamber R1 as the door 4 moves. Oil comprising an oil return path 6b having a check valve 7 drilled in the piston 4 for movement A pressure control circuit 6 is provided, and the movement of the piston is controlled by the hydraulic control circuit 6. It has become so. Therefore, when the door is opened, the piston 4 moves inside the cylinder 5 to the right in the figure. Moving in the direction to store the return spring 3 and move the piston 4 to open the door. Along with this, the hydraulic oil in the piston front chamber R1 passes through the oil outward passage 6a and passes through the piston rear chamber R2. It will flow to and thus the door is guaranteed to open. Also, when the door opening force is released, the piston 4 returns The stored force of the spring 3 restores the piston to the left in the figure and the piston The check valve 7 opens with the movement of the closing door of No. 4 and the working oil in the piston rear chamber R2 is returned to the oil return path 6b. Flow into the piston front chamber R1 through which the closing movement of the piston 4 is guaranteed. , So that the piston 4 transmits the rotational force in the closing direction to the output shaft 1, so that the closing of the door is performed. Be seen. In particular, the door closer of the present invention has a structure shown in FIG. Solenoid that is energized and closed when the pair of human detection sensors C and C are turned on at the same time The valve 8 is interposed. Therefore, when the door is closed, the sensor reaction on both sides of door D When a person comes to the rear e, and both try to open the door D at the same time, the sensors C on both sides , C are turned on, the solenoid valve 8 is closed, and the working oil flows through the oil outward path 6a. And the hydraulic oil in the piston front chamber R1 passes through the oil outward passage 6a It becomes impossible to open the door because it cannot flow to the room R2, so the door D is closed. Can be locked to Then, when either person leaves the front of the door, the solenoid The valve 8 returns to the open state, and the hydraulic oil in the piston front chamber R1 passes through the oil outward path 6a. Flow to the piston rear chamber R2, the piston moves, and the door can be opened as usual.       [0008]   Next, FIG. 2 relates to a second embodiment of the door opening control device of the present invention and is included in claim 1. Is an embodiment. The door opening control device A according to the second embodiment is provided with an oil recovery valve having a check valve 7. The first embodiment shown in FIG. 1B is that the passage 6b 'is bored in the wall of the cylinder 5. It is different from the door opening control device.       [0009]   FIG. 3 relates to a third embodiment of the door opening control device according to the present invention, which is included in claim 2. It is a mode. In the door opening control device A of the third embodiment, the solenoid valve 8 is closed. Even if the hydraulic oil cannot flow through the oil outward path 6a, the piston 4 moves with the opening movement of the piston. Cylinder 5 so that the hydraulic oil in the front chamber R1 can flow to the piston rear chamber R2. Having an oil bypass path 6c bored in the wall of the 1 (b) that the throttle control valve 9 is provided facing the front chamber side port 6c '. Different from the door opening control device of the first embodiment shown in FIG. Therefore, the throttle control valve 9 must be fully throttled. If it happens, the same operation as the door opening control device of the first embodiment shown in FIG. When the throttle control valve 9 is not fully throttled, the oil valve having the throttle control valve 9 is used. The peculiar action when the bypass path 6c is provided is exhibited. That is, as shown in FIG. When a person comes to the sensor reaction area e on either side of the door D and tries to open the door D , The person detection sensor C on the person side is turned on, but the other person detection sensor C is turned on. Since the solenoid valve 8 remains open, the door D is opened. Then, with the movement of the piston 4 in the door opening direction, the hydraulic oil in the piston front chamber R1 is moved in the oil forward path. 6a to the piston rear chamber R2 and the door D is opened at normal speed. Again door People come to the sensor reaction areas e on both sides of D and both try to open the door D at the same time. Sensor C on both sides is turned on, the solenoid valve 8 is closed and hydraulic oil Are prevented from flowing through the oil outward path 6a. However, trying to open the door D With the movement of the piston 4 in the door opening direction, the hydraulic oil in the piston front chamber R1 is throttled and adjusted. To the piston rear chamber R2 through the oil bypass path 6c whose flow rate is reduced by the valve 9. Therefore, even if a person inside the room tries to open the door D vigorously due to the difference in touch, D opens only at a very slow rate. Therefore, avoid the risk of the door D hitting the person outside the room. At the same time, the danger that a person inside the room will vigorously hit the door D is avoided.       [0010]   Subsequently, FIG. 4 relates to a fourth embodiment of the door opening control device of the present invention and is included in claim 2. Is an embodiment. The door opening control device A according to the fourth embodiment is installed in the oil bypass path 6c. The throttle control valve 9 is provided so as to face the piston rear chamber side port. Is different from the door opening control device of the third embodiment shown in FIG. Same as the case.       [0011]   FIG. 5 relates to a fifth embodiment of the door opening control device of the present invention, which is included in claim 3. It is a mode. The door opening control device A according to the fifth embodiment is used for the initial opening movement of the piston 4. Of the hydraulic fluid in the piston front chamber R1 during the constant midway To the wall surface of the cylinder 5 so that the fluid can flow without being restricted Is the only difference from the door opening control device of the third embodiment shown in FIG. If the oil escape passage 6d is provided, it is possible to realize a unique component of the door opening control device of the third embodiment. 1 (a) due to the peculiar action caused by the above, that is, by providing the oil bypass passage 6c. ) The solenoid is provided when people come into the sensor reaction areas e, e on both sides of the door D at the same time. By closing the valve 8, it is possible to solve the problem that the door D can be opened only at a low speed. That is, when a person comes into the sensor reaction areas e, e on both sides of the door D, the solenoid valve When the valve 8 is closed and the door D is to be opened, the door D moves from the fully closed state to the predetermined opening angle. Then, as the piston 4 moves in the door opening direction, the hydraulic oil in the piston front chamber R1 is throttled and adjusted. To the piston rear chamber R2 through the oil bypass path 6c whose flow rate is reduced by the valve 9. Flow, it can open only at a slow speed, but the moving position of the piston 4 in the door opening direction However, when both ends of the oil escape passage 6d come to face the front surface side and the rear surface side of the piston 4, The hydraulic oil in the piston front chamber R1 flows to the piston rear chamber R2 through the oil escape passage 6d. As a result, the door D can be opened at a normal high speed.       [0012]   Next, FIG. 6 relates to a sixth embodiment of the door opening control device of the present invention and is included in claim 3. Is an embodiment. The door opening control device A of the sixth embodiment is the fourth embodiment shown in FIG. Based on the door opening control device, it is possible to obtain the same operation and effect as the fifth embodiment. A part slightly away from the position of the piston 4 in the closed state toward the piston front chamber. As a result, the oil escape passage 6d 'is drilled so as to short-circuit with the oil bypass passage 6c, and 5 is that the adjustment valve 9 is located on the piston rear chamber side with respect to the oil escape passage 6d '. It is different from the door opening control device of the fifth embodiment shown in FIG. Therefore, the door D shown in FIG. When a person comes to the sensor reaction areas e, e on both sides of, the solenoid valve 8 is closed, When attempting to open the door D, the piston D moves from the fully closed state to the predetermined door opening angle. The hydraulic oil in the piston front chamber R1 flows by the throttle adjusting valve 9 as the valve moves in the door opening direction. Flows to the piston rear chamber R2 through the oil bypass passage 6c with a reduced flow rate, resulting in a slow speed. Although it can only be opened by using the 6d ', the hydraulic oil in the piston front chamber R1 passes through the oil escape passage 6d'. Flow into the piston rear chamber R2, and the door D can be opened at a normal high speed. become able to.       [0013]     [Effect of the device]   As described above, according to the door opening control device of the present invention, both doors are closed in the closed state. If there is a person on the side, the movement of the piston will be locked and it will not be possible to open the door and the door will open unexpectedly. You can avoid the risk of hitting someone on the side where the door opens, and then either When one person leaves the front of the door, it can be opened as usual.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1A is a plan view of a door opening control device according to a first embodiment of the present invention attached to a door, and FIG. 1B is a vertical front view of the door opening control device. .. FIG. 2 is a vertical sectional front view of a door opening control device according to a second embodiment of the present invention. FIG. 3 is a vertical sectional front view of a door opening control device according to a third embodiment of the present invention. FIG. 4 is a vertical sectional front view of a door opening control device according to a fourth embodiment of the present invention. FIG. 5 is a vertical sectional front view of a door opening control device according to a fifth embodiment of the present invention. FIG. 6 is a vertical sectional front view of a door opening control device according to a sixth embodiment of the present invention. [Explanation of Codes] D ... Door, R1 ... Piston front chamber, R2 ... Piston rear chamber, 1 ... Output shaft, 2 ... Rotation-linear motion conversion mechanism, 3 ... Return spring, 4 ... Piston, 5 ... Cylinder, 6 ... Hydraulic control circuit, 6a ... Oil forward path, 6b ... Oil return path, 7 ... Check valve, 8 ... Solenoid valve,

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Hiroshi Shirasawa             214 Hironobo, 530 Motoyama-cho, Fuchu-shi, Hiroshima             -Inside the corporation

Claims (1)

[Claims for utility model registration] Claims: 1. A piston that moves with the opening and closing of a door, and a cylinder that allows the hydraulic oil in the piston front chamber to flow to the piston rear chamber as the piston opens. It consists of an oil outward path bored in the wall and an oil return path having a check valve bored in the cylinder wall or the piston so as to cause the hydraulic oil in the piston rear chamber to flow to the piston front chamber with the closing movement of the piston. A hydraulic control circuit is provided,
In a door opening control device in which the movement of a piston is controlled by the hydraulic control circuit, the hydraulic control circuit is a solenoid valve that is energized and closed when a person is present on both sides of the door in the middle of an oil outward path. A door opening control device characterized in that a door is installed. 2. The door opening control device according to claim 1, wherein the hydraulic control circuit allows the hydraulic oil in the piston front chamber to flow to the piston rear chamber as the piston opens. A door opening control device comprising an oil bypass passage having a throttle control valve bored in a cylinder wall. 3. The door opening control device according to claim 2, wherein the hydraulic control circuit causes the hydraulic oil in the piston front chamber to flow to the piston rear chamber during a constant halfway period of the opening movement of the piston. A door opening control device characterized by having an oil escape passage that is recessed in the cylinder wall surface or bored in the cylinder wall so that it can be performed.