JPS6095086A - Automatic door gradual closing device - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention comprises a spring device loaded in the closing direction;
An automatic door closure with a closure shaft, the door closure shaft guiding a movable piston of a hydraulic T-stone cylinder unit serving the purpose of damping; The present invention relates to a type in which a pressure chamber of a piston cylinder unit is connected to a pressureless chamber via a return passage equipped with a throttle device and a check valve that opens toward the pressure chamber.

The purpose of the door closing device is to keep the door shoji normally closed.

A door closing device equipped with a hydraulic damper is usually attached to the door. The hydraulic damper has a spring device that stores the energy required to automatically close the door shoji when the door is opened, and this energy is used to close the door shoji after the door has been opened. Be used. The automatic door closing movement is generally damped by a hydraulic throttling mechanism, so that the door is closed gradually and reliably.

A door closing device according to the current state of the art is required to have a reliable closing function for the door shoji, increase safety by using a hydraulic throttling mechanism, and eliminate as much noise as possible when closing the door.

Door closures with hydraulic damping mechanisms are standardized and - their quality is constantly monitored as long as they comply with the quality requirements of standards and standards.However, known door closures do not require a high level of technology. However, it has some common drawbacks. That is, when opening a door, in addition to the opening resistance, a large force is required to store the energy required for the closing movement of the door shoji. This drawback is particularly noticeable when a large door or heavy door requires a large closing force, and is particularly noticeable for women, children, the elderly, etc. Sometimes it is impossible for these people to open this type of door without the help of others.

In order to alleviate this general drawback, a door closing device with a locking device has been proposed, for example in DE 254 179
It is proposed in the specification of No. 0. In this known door closing device, the door shoji is fixed after a predetermined opening angle. This fixation occurs because the return flow opening of the piston is closed by a needle that projects into this opening. In addition to this return opening in the piston, this known door closure has a return passage provided with a throttle device, which return passage is opened and closed by an electromagnetically operated holding valve. When the return flow conduit in the piston of the door closing device is closed by the needle with this second return flow passage closed by the holding valve, the door sash remains in the open position.

Only when the holding valve is opened in the event of a danger, the closing spring can move the door sash into the closed position. This door is therefore constantly monitored to ensure that certain alarm criteria are met, for example to immediately release the locking device in the event of a fire, thereby re-imposing the door closing device with the required characteristics to automatically close the door sash. Ru.

Another known door closing device, disclosed in DE 27 51 589 A1, avoids the aforementioned difficult opening movement of the door sash by fixing the closing energy stored during the initial opening process. Shortcomings are avoided. In this type of door closer, the closing spring is locked in its preloaded position by interposing a second two-stone between the piston and the spring arrangement, which engage the door closer shaft. Ru. The return flow conduit passing through the second piston is likewise closed by means of an electromagnetically operated switching valve or opened in the event of a hazard. In normal conditions, the return flow conduit is closed, so that no pressure medium flows out of the pressure chamber containing the piston that engages the door closure shaft, so that the door closure shaft does not flow with it. A piston movably coupled to the piston can reciprocate within the pressure chamber without resistance, so that the door sash connected to the door closure shaft can be easily opened and closed by hand. This door closing device is constantly connected to a monitoring device, such as a smoke detector or fire responder, so that the door sill automatically closes in the event of a danger. must be able to be closed.

However, the disadvantage of this type of door closing device is that the door sash must either remain open at all times or must be intentionally closed at all times. Modern humans are generally accustomed to self-closing doors, so it is expected that the door will often be left open.

There are also automatic doors that close. However, this device is technically and economically uneconomical and does not fall within the scope of the invention.

An object of the present invention is to provide a gradual closing of a door of the type mentioned at the beginning, in which the door shoji automatically closes after the door is opened at any time, and the door shoji can be opened easily without requiring significant force. It is about providing the equipment.

The gist of the present invention that solves this problem is that a supporting member capable of inherent movement is inserted between the two stones and the spring device,
This support member is driven by external energy in a spring preloading direction depending on the actuation of the door.

With this configuration, no significant force is required to preload the spring device upon opening the door, making opening the door extremely easy. The energy required for the preloading of the closing spring during the door opening movement is generated by external energy;
The spring device is thereby automatically preloaded. When the door opening movement is completed, the energy stored in the spring causes an automatic door closing movement.

In one advantageous embodiment of the invention, the support element is designed as a nut loaded by a spring device, which nut is guided non-rotatably into the cylinder bore and is screwed into the threaded spindle. The threaded spindle and spring device extend through fA and are rotatably and axially displaceably supported and connected to the electric motor via a gearing with a brake. Due to the use of a screw transmission, after energy has been stored in the spring device, upon release of the brake of the transmission, the support member and thus the piston loaded thereby are pushed back by the spring under hydraulic damping. , whereby the door sill is returned to the closed position in a known manner.

In a further embodiment of the invention, instead of electromechanically prestressing the spring arrangement, the support plate is designed as a pressure plate loaded by the spring arrangement, which pressure plate passes through the spring arrangement. connected to a two-stone rod extending over and guided longitudinally movably within the casing, the two-stone rod being guided in an auxiliary cylinder separated from the main cylinder by a locking two-stone; This auxiliary cylinder is connected via a pump to a pressure medium circuit controlled and driven by an electric motor. In a further embodiment of the invention, the movement of the support member is controlled by an electronic control circuit triggered by the movement of the trigger so that the spring device can be preloaded prior to the start of the door opening movement. Ru. Thus, for example, when the door handle is pressed down, the door contact is automatically triggered, which actuates the control circuit in such a way that the spring is preloaded early by a certain portion of the piston stroke. In order to maintain this early spring preload movement and to generate a signal aimed at releasing the closing energy, a further embodiment of the invention provides an electronic control in the pressure chamber in front of the giston. Opposed is a negative pressure operated plunge doll solenoid mechanism that provides control pulses for the circuit.

Next, the present invention will be specifically explained with reference to the illustrated embodiments.

The door closing device shown in FIGS. 1 and 2 has a casing 10 having an elongated rectangular parallelepiped longitudinal section, and a cylinder hole 11 is provided in the casing 10. It is closed from both sides by spigots, which will be explained in more detail later. The casing 1D is provided with two step holes (not shown) that match each other in the lateral direction.
A bearing insert with a packing ring is accommodated in this step bore, in which a door closure shaft 12 is rotatably guided. A pinion 13 is attached to the longitudinally central region of the door closing shaft 12. Both ends of the door closing mechanism shaft 120 are provided with, for example, four corner portions for unrotatably fixing the link arms (not shown) that connect the door frame and the door shoji.

A piston 14 is arranged longitudinally movably in the cylinder bore 11 and consists of a first piston head 15, a second piston head 16 and a web 17 located between them. This web 17 is formed as a rack, and the above-mentioned pinio/
13 are engaged. Therefore, 120 revolutions of the door closure shaft causes longitudinal movement of the piston 14, and vice versa. Inserted into the cylinder hole under sealing action! A check valve 18 is disposed within the piston head 15, and this check valve 18 opens in the direction toward the pressure chamber 20 on the left side of the drawing. In addition, a spring-loaded overpressure valve 19 is arranged in the piston spatula 15, which can be used, for example, by pulling on a door sill to force the overpressure into the pressure chamber 20 on the left side of the piston head 15. Opens when pressure is generated.

A stepped hole 21 is provided in the casing 10 in parallel to the cylinder hole 11.
is formed in the step hole 21, and a throttle cone that aligns with the seat formed by the step on the left side of FIG. 1 is the throttle valve 22.
are screwed together to form a The throttle valve 22 has a throttle cone 23 which can extend into the shoulder of the shoulder bore 21 for flow restriction. On the left side of the throttle cone 23, two transverse holes 24, 25 are opened in the step hole 21 which opens an annular chamber and accommodates the throttle valve 22, which are connected to the cylinder bore 11. There is. Furthermore, from the step hole 21, the piston head 1
A lateral hole 26 not covered by 5 communicates.

The left end region of the housing 10 is closed by a plug 27 screwed into the cylinder bore 11 via a packing ring. This plug 27 has a chamber 2B separated from the pressure chamber 20 by a diaphragm, in which a spring-loaded movable plunger 30 surrounded by an annular solenoid 31 of a plunger-type solenoid mechanism 32 is installed. A combined mushroom-shaped tappet 29 protrudes.

Inside the cylinder hole 11 is a two-stone head 1 with two stones 14.
6, a support member 33 is arranged, and this support member 33 is loaded by a spring device 34 in the direction of leftward movement of the two-stone 14, in other words in the direction of closing the door sash. . This spring device 34 acts as a closing compression spring
is the other end, when the casing 10 is tightly closed, is formed as a support member 33+r3b, whose protrusion 3
7 into the longitudinal groove 38 of the cylinder hole 11. As a result, the nut 36 is mounted longitudinally movably and non-rotatably in the housing 10. The nut 36 is reversibly engaged with a thread 40 of a threaded spindle 39 for power transmission, the threaded spindle 39 being rotatably and axially mounted in a sealed manner in the plug 35. It is driven by an electric motor 43 via a gear stage 41 and a reduction gear 42 with a brake. An electronic control circuit 44 is arranged between the power source and the electric motor 43, and is controlled by the syringe type nnoid mechanism 32 and the door contact 45. This door contact 45 is preferably operated by a latch of the door sash, which cooperates with a seat in the door frame, in short by a handle of the door.

In the embodiment shown in FIG. 2, the support member 33 consists of a pressure plate 46 guided axially displaceably in the cylinder bore 11, which passes through the spring arrangement 34 in its longitudinal direction. It is fixedly connected to the closing stone rod 47 in the Qq~ and main hole. The piston rod 47 further includes a closure tap 35 with an auxiliary cylinder 48.
It penetrates into the auxiliary cylinder 48 and is provided with a locking stone 49 within the auxiliary cylinder 48. The auxiliary cylinder 48 has a pump 50 driven by the electric motor 43 and a control valve 51 in its casing part. The auxiliary cylinder 48 has passages 52.5 in front and behind the locking piston 49 in consideration of the entire piston stroke.
3 is open, and a pump 050 is placed between these two roads. A control valve 51 is further arranged in parallel with the pump 50 between the two reverse paths. When this control valve 51 is shut off, both passages communicate only through the pump 50, and when the control valve 51 is opened, both passages are short-circuited, and the pressure is transferred from the cylinder chamber in front of the lock piston 49 to the cylinder chamber behind the lock piston 49. can bypass pump 50 and return.

Next, the function of the door closing device of the present invention will be explained starting from the closed state of the door shoji. When the door contact 45 is operated via the latch, the triggered pulse activates the control circuit, which switches the electric motor 43 ON, and in the embodiment shown in FIG. via the grinder 39 or, in the embodiment shown in FIG. 2, the pump 5.
0 and the locking piston 49, the support lug 33 is moved to the right in the drawing against the force of the spring device 340.

This displacement movement of the support member 33 is determined by the motor operating time, which is regulated in a control circuit. The motor operating time can be adjusted so that the support member 33 is advanced by a value corresponding to a predetermined door opening angle.

Next, when the door shoji is actually opened, the t-stone 14 moves and negative pressure is generated in the pressure chamber 20. This negative pressure is converted into electrical pulses by the syringe type solenoid mechanism 32 and sent to the control circuit. 44. As a result, the electric motor 43 receives a command to further compress the spring device 34, always corresponding to the predetermined amount of advance, before opening the door. When the door is opened rapidly, a correspondingly large negative pressure is generated in the pressure chamber 20 in front of the piston 14, which negative pressure is converted into a signal by the plunger type solenoid mechanism 32, which signal is sent to the control circuit. 44 and transmits a "quick rotation" command to the electric motor 43. At the moment when the door shoji finishes its opening movement, the negative pressure in the pressure chamber 20 in front of the piston head 15 rises to the normal value, which causes a change in the measured value of the plunge doll solenoid mechanism 32 to be controlled via the control circuit 44. A "stop" command is transmitted to the electric motor 43. In the embodiment shown in FIG. 1, the brake of the reduction gear device 42 is activated immediately when the electric motor stops, and the nut 36 is activated.
keep it in its adjusted position. In the embodiment shown in FIG. 2, after the electric motor 43 has stopped, the pump 50 stops discharging pressure medium, so that the volumes in the cylinder chambers before and after the locking piston 49 remain unchanged, so that: Via the piston rod 47, the pressure plate 46 is held fixed in its current position against the closing force of the spring device 34.

After a predetermined short waiting time, the control circuit 44 issues a "spring load reduction" command, which releases the brake of the reduction gearing 43 in the embodiment shown in FIG. 1 and in the embodiment shown in FIG. The valve 51 is switched to the open position, which allows pressure medium to flow from the cylinder chamber in front of the lock piston 49 via the passage 53 into the passage 52 and from the passage 52 into the cylinder chamber behind the lock piston 49. . This allows the spring device 34 to move the support member 33 forward in either embodiment. Therefore, the piston 14 is also moved by the support member 33 toward the front end of the cylinder where the plunger type solenoid mechanism 32 is attached. This causes the door closure shaft 12 to rotate in the door closing direction via the rack 17, and thus the door sash moves to the closed position. At that time, the door closing movement is carried out in the same way as in the conventional door closing device.
21, 24, 25) is hydraulically damped by a throttle valve 22 located in the valve 21, 24, 25). As soon as the door sash is completely closed or the clutch enters the catch, the door contact 45 is operated again in the "close" direction, the electric motor 43 receives the first command again, and moves the support member 33 to the predetermined door opening angle. Advance by an amount commensurate with that.

If the door is not opened after the door handle is operated for the first time, the control circuit 44 is activated in the same way as when the door opening movement is completed, and after a predetermined time, the electric motor 43 or the reduction gear device 4 is activated.
A "spring load reduction" command is issued to the brake or control valve 51 of No. 2. The full closing force therefore acts again on the piston 14 and thus on the door sill.

Of course, in the event of a power outage, the motor and control circuit will stop operating. This leaves the spring device 34 uncontrolled, so that it constantly presses the support member 33 against the shank 14 and springs it constantly in the closing direction. Even in this state, the spring device is preloaded each time the door shoji is opened. Therefore, automatic closing of the door sash is guaranteed even in the absence of external energy, for example in the form of electric current, and the idea of giving priority to safety is put to practical use.

The invention is not limited to the illustrated embodiment. For example, instead of electric current, other known energy forms can be used as the external energy.

Furthermore, instead of a plunge free solenoid mechanism, other known mechanisms for converting piston movement into information to the control circuit 44 may be used, and the control circuit 44 is not necessarily electrical.

[Brief explanation of the drawing]

FIG. 1 is a vertical sectional view of the main part of a first embodiment of the invention, and FIG. 2 is a longitudinal sectional view of the main part of a second embodiment of the invention.

Claims (1)

[Claims] 1. An automatic door closer with a door closer shaft loaded in the closing direction by a splash device, the door closer shaft serving the purpose of buffering. The movable piston of the hydraulic piston-cylinder unit is guided, and the pressure chamber of the hydraulic piston-cylinder unit is made pressure-free via a return passage with a throttle device and a check valve that opens towards said pressure chamber. In the type that is connected to the chamber of
Between the piston (14) and the spring device (34) a support member (33') capable of natural movement is inserted, which support member can be moved by external energy depending on the actuation of the door. An automatic door closing device 2 characterized in that the spring is driven in the direction of preloading, the support member (33) being formed as a spring (36) loaded by a spring device (34). , this nut is non-rotatably guided in the cylinder casing (10) and has a kinematic thread (
40), which is rotatably and axially immovably supported in the door closure casing (10) through this spindle or spring device (34), and which has a brake. 2. A door closure according to claim 1, which is connected to an electric motor (43) via a transmission (42) comprising a transmission device (42). 6 consisting of a pressure plate (46) loaded by said support member (33) and a spring device (34), which pressure plate passes through the spring device (34) and is located within the door closure casing (10); It is connected to a longitudinally movably supported piston rod (47) which is engaged by a locking piston (49) into an auxiliary cylinder (48) separated from the main cylinder (11). This auxiliary cylinder (48) is connected to the electric motor (
43) A door closing device according to claim 1, wherein the door closing device is connected in a pressure medium flow controlled and driven by 43). 4. The movement of the support member (33) is controlled by an electronic control circuit (44) which is controlled by door operation. door closure. 5. In the pressure chamber (20) in front of the piston (14) there is a plunger-type solenoid mechanism (32) operated by negative pressure for the generation of control pulses for the electronic control circuit (44). Contrasted claim 1
Any of items 1 to 4 is the door closing device according to item 1.