JPH0436382Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a door closer, and particularly to a door closer incorporating a locking mechanism within the closer body.

[Prior Art] Regarding door closers that utilize hydraulic pressure, various structures have been already provided. Some of these include, for example, those that make it possible to maintain the opening angle of the door at a desired angle (Japanese Patent Laid-Open No. 57-187481), or those that allow the door to open even when abnormal loads such as wind pressure act in the opening direction. There is one in which the rotation can be controlled (Japanese Patent Application Laid-Open No. 57-9977).

All of these have a structure in which the hydraulic pressure of the hydraulic oil sealed in the housing works together with the elastic force of the compression spring to regulate the movement of the piston inside the housing and the opening and closing of the door. .

Incidentally, in recent years, various security systems have been developed with the aim of improving safety measures in various buildings such as houses. Amid this trend, interest in so-called home security, which is primarily aimed at preventing theft, is gradually increasing, and there is a growing momentum to actively adopt this when building a home.

When looking at the entrance structure of ordinary homes from this perspective, the current approach is to take measures such as making the door more solid and the locking key structure more robust and complex. It's just that countermeasures are being taken.

[Problem that the invention aims to solve] For this reason, if the door is unlocked from outside by some means, it will be difficult to prevent theft.
The drawback was that it could not fulfill any protective function.

Therefore, the inventor of the present invention focused on the fact that most of the doors in use recently are of the swing type, and that the opening and closing of the doors is regulated through a door closer attached to the indoor side. The idea was to further strengthen the door's closed state by incorporating a controllable locking mechanism into the door.

In other words, the door closer is always installed on the indoor side, and it is impossible for an outsider to approach the door closer from outside and operate it immediately.Therefore, the door closer cannot be operated when the door is closed. If the door could be controlled accurately, the door would be securely locked, which would be extremely desirable from a security perspective.

However, as is clear from the prior art described above, the door closer itself has a structure that focuses solely on regulating the opening and closing of the door, and it also has a locking mechanism for crime prevention. The reality is that no attempt has been made to grant it.

Therefore, the purpose of this invention is to incorporate a locking mechanism into the door closer that regulates the opening and closing speed of the door, thereby making it possible to artificially control the opening and closing of the door. To provide a door closer that can surely prevent illegal entry of outsiders from outside and can contribute to establishing home security.

[Means for Solving the Problems] In order to achieve the above object, the present invention has the following configuration.

That is, in the door closer according to the present invention, a piston linked to the opening and closing of the door and a compression spring for applying a pressing force to the piston are disposed in a cylinder chamber provided in the housing, and the piston Of the respective compartments of the cylinder chamber which are divided into two via the cylinder chamber, one side which is the pressure side of the compression spring is used as a first oil chamber, and the other side is used as a second oil chamber. Of the first conduit passage and the second conduit passage, which are arranged to be able to communicate with the second oil chamber separately, the first conduit passage communicates with the second oil chamber through the opening on the housing side when the door is opened. When the door is closed, the opening on the housing side and the through hole on the piston side are made to face each other to allow communication between the first oil chamber and the second oil chamber. A flow path opening/closing mechanism consisting of a check valve installed at the chamber side opening and capable of blocking the flow path and preventing movement of the piston when the door is closed is installed to enable communication between the flow path opening and closing mechanism. has its compositional characteristics.

[Function] Therefore, by operating the channel opening/closing mechanism disposed in the second conduction path when the door is closed, the second
Since the flow path of hydraulic oil flowing from the oil chamber to the first oil chamber can be blocked, the hydraulic oil whose flow path is cut off will stay and prevent the piston from moving within the cylinder chamber, causing the door to close. The state can be sustained. In addition, when opening a door that is in a locked state due to the flow path of the second conduction path being blocked, the flow path opening/closing mechanism is operated to release the blockage of the flow path. By communicating the second oil chamber and the first oil chamber and securing a flow path for hydraulic oil from the second oil chamber to the first oil chamber, the piston can be moved and the locked state can be released. , can open the door.

[Example] Hereinafter, an example of the present invention will be described in detail based on the drawings.

A cylinder chamber 2 provided in the housing 1 includes a piston 3 and a compression spring 4 that presses the piston 3.
and are provided.

Of these, the piston 3 slides within the cylinder chamber 2 in conjunction with the opening/closing movement of the door, and the piston 3 defines two compartments within the cylinder chamber 2. Of the two compartments, one compartment located on the pressing side of the compression spring 4 functions as the first oil chamber 5, and the other compartment functions as the second oil chamber 6.

The interlocking mechanism of the piston 3 synchronized with the opening and closing of the door consists of a rack 9 carved on one side of the piston 3 and a pinion 8 supported via a support shaft 19 in a pinion chamber 7 provided in the housing 1. This is done by connecting the supporting shaft 19 to the other end of a connecting arm, one end of which is pivotally attached to a door frame (not shown).

Also, the piston 3 is connected to the first oil chamber 5 of the cylinder 2.
A compression spring 4 that presses the cylinder chamber 2 toward the second oil chamber 6 is interposed between a side wall 10 of the cylinder chamber 2 on the second oil chamber 6 side and a base portion 12 within the piston 3 having a cavity 11 .

The first oil chamber 5 and the second oil chamber 6 in the cylinder chamber 2 are formed in a structure in which they communicate with each other via channels that are separate routes for the first conduction passage 13 and the second conduction passage 14, respectively. There is.

Among these, the first conduction path 13 is the first conduction path when the door is opened.
The oil chamber 5 is formed to communicate with a second oil chamber 6 when the door is closed. Specifically, as in the illustrated embodiment, when the piston moves toward the second oil chamber 6 against the pressing force of the compression spring 4 when the door is opened (see FIG. 2), the circumference of the piston 3 The opening 15 on the second oil chamber 6 side in the cylinder chamber 2 was closed by the side wall, and when the door was closed, the piston 3 was pushed and moved toward the first oil chamber 5 side in the cylinder chamber 2 by the reaction force of the compression spring 4. (see Fig. 1), the peripheral side wall of the piston 3 causes the first piston in the cylinder chamber 2 to
The opening 16 on the side of the oil chamber 5 is formed in a communication structure in which it is closed. In addition, the reference numeral 20 in the figure is a through hole bored in the circumferential side wall at an appropriate position of the piston 3 so as to face and match the opening 15 when the door is completely closed.

On the other hand, in the flow path of the second conduction path 14, there is a control that allows the hydraulic oil to flow down from the second oil chamber 6 to the first oil chamber 5 only during the door opening operation, and always prevents the reverse flow. A channel opening/closing mechanism 22 is provided.

The embodiment shown in FIG. 1 and FIG. 2 shows the operating state of a door closer in which a passage opening/closing mechanism 22 is incorporated. According to this, the channel opening/closing mechanism 22
is a solenoid valve 17 provided in the flow path of the second conduction path 14.
and a check valve 18 on the downstream side of the electromagnetic valve 17, and it is preferable that the check valve 18 is disposed immediately before the first oil chamber 5. Among these, the solenoid valve 17 is
When the door is in the closed state, the solenoid valve 17 is arranged to be controllable via an electronic circuit or the like so that the flow path of the second conduction path 14 can be shut off, and the operation of the solenoid valve 17 is controlled by a numeric keypad (not shown) or the like. This can be done freely from either indoors or outdoors by inputting signals from an appropriate operation panel. Furthermore, the check valve 18 is configured to allow hydraulic oil to flow into the first oil chamber 5 from the second guide path 14 side via the ball valve 23 and to prevent its reverse flow.

According to the illustrated example, the second conduction path 14 is formed by a separate route that is clearly distinguished from the first conduction path 13, but if necessary,
The second conduction path 14, which is equipped with a flow path opening/closing mechanism that is controlled so as to be able to shut off the flow path when the door is closed, is connected to the first oil chamber and the first oil chamber.
between the first conductive path 13 and the first conductive path 13;
It can also be formed by creating a separate route that communicates with

In addition, the reference numeral 21 in the figure is a flow rate adjustment valve for adjusting the opening/closing speed of the door, and the housing 1
Hydraulic oil is sealed in an internal space such as a cylinder chamber 2 provided in the cylinder chamber 2 in a liquid-tight manner.

Since the present invention is constructed in this way,
The following describes how to use it by attaching it to a door.

The piston 3 inside the housing 1 when the door is open is
The piston 8, which is directly connected to the connecting arm that transmits the movement of the door, rotates counterclockwise while engaging the rack 9, thereby moving the inside of the cylinder chamber 2 in the direction of the second oil chamber 6 against the compression spring 4. be forced to move. With such movement of the piston 3, the positional relationship of face-to-face alignment between the through hole 20 of the piston 3 and the opening 15 of the first conductive portion 13 is released, and the opening 15 is blocked. On the other hand, the second piston 3
As the oil chamber moves in the 6 direction, the first conduction path 13
The shielding state of the opening 16 is released, the first conduction path 13 and the first oil chamber 5 communicate with each other, and the inside of the first oil chamber 5 becomes relatively wide. The hydraulic oil pushed out from inside the second oil chamber 6 flows into the first oil chamber 5 through the second guide path 14 in which the flow path opening/closing mechanism 22 is in an open state.

That is, by operating the solenoid valve 17 in a state where the flow path is not blocked (see FIG. 2), the hydraulic oil is allowed to flow down to the first oil chamber 5 side via the second conduction path 14, and The check valve 18 also allows flow into the first oil chamber 5.

Therefore, in such a state, the channel opening/closing mechanism 2
2, a door whose door closer locking mechanism is not activated can be opened freely.

Also, when reversing the door that was in the opening direction to the closing direction, the pinion 8 rotates clockwise via the arm, and the rack 9 that meshes with the pinion 8 moves the piston 3 toward the first oil chamber 5. begins to move to. At this time, the compression spring 4 in the compressed state
The piston 3 automatically moves within the cylinder chamber 2 while being pressed toward the first oil chamber 5 due to the reaction force. In this case, as the piston 3 moves toward the first oil chamber 5, the internal pressure of the first oil chamber 5 gradually increases. When the internal pressure of the first oil chamber 5 increases in this way, hydraulic oil flows into the second oil chamber 6 through the second conduction path 14, which is closed due to the presence of the flow path opening/closing mechanism 22. There is no backflow, so the movement of hydraulic oil from the first oil chamber 5 to the second oil chamber 6 is performed only through the first conduction path 13. That is, the hydraulic oil can flow into the first introduction path 13 through the opening 16 of the first oil chamber 5, and the opening and closing of the opening 16 and the opening 15 are related to the movement of the piston 3. Since the fluid is relative to each other, it slowly flows into the second oil chamber 6 through the flow path formed between the opening 15 and the through hole 20. Therefore, the movement of the piston 3, that is, the movement in the door closing direction, is relatively slow, and such movement can be adjusted by the flow rate regulating valve 21. As the piston 3 moves toward the first oil chamber 5, the first oil chamber 5 becomes relatively smaller, and eventually the opening 1
6 is shielded and the door is in a closed state.

After the door is in the closed state, by operating an appropriate operation panel such as a master operation panel installed indoors or a numeric keypad installed outdoors, the channel opening/closing mechanism 22 disposed in the second conduction path 14 is opened.
Activate to block that flow path.

That is, since the passage opening/closing mechanism 22 is composed of the solenoid valve 17 and the check valve 18, by operating the solenoid valve 17 in the direction of blocking the passage, the passage of the second conduction passage 14 is immediately opened. Can be blocked. In this case, if you operate the numeric keyboard by inputting it based on a preset code number or using a magnetic card or IC card,
It cannot be operated by outsiders other than related parties such as family members.

Therefore, in such a state, the channel opening/closing mechanism 2
2 to block the flow path of the second conductive path 14, even if an outsider tries to open the door, it will be impossible to open the door.

That is, since the opening 16 of the first conduction path 13 is shielded, and the flow path of the second conduction path 14 is blocked by the flow path opening/closing mechanism 22, the flow inside the second oil chamber 6 that is necessary when opening the door is The state is such that movement of hydraulic oil to the first oil chamber 5 is impossible. As a result, the piston 3 is locked in the cylinder chamber 2 with the door closed. Therefore, the door is not only locked with a normal key, but also via the door closer, providing a double security measure.

In order to release such a locked state and open the door, operate the operation panel with a preset code number, or use a magnetic card or IC card to release the operating state of the channel opening/closing mechanism 22. And the second
By opening the flow path of the conduction path 14, the movement of the piston 3 in the direction of the second oil chamber 6 may be made possible.

That is, the solenoid valve 17 in the second conduction path 14
By releasing the channel closed state, the second oil chamber 6 and the first oil chamber 5 can be brought into communication. Therefore, the piston 3 can be moved in the direction of the second oil chamber 6, which is the door opening direction, and the door can be opened smoothly.

Note that in order to operate the flow path opening/closing mechanism 22 to shut off the flow path, a method is adopted in which the arm interposed between the door closer and the door, or the displacement of the door itself is sensed using a micro switch or the like.
It can also be done automatically.

[Effects of the invention] As described above, according to the invention, the first oil chamber and the second oil chamber can communicate with each other via the first conduction path and the second conduction path. Furthermore, when the door is opened, the first oil chamber is connected to the first oil chamber through the opening on the housing side, and when the door is closed, the opening on the housing side and the through hole on the piston side are made to face each other. 2.Since it is formed to allow communication with the oil chamber, when trying to close the door, the opening area of the opening and the through hole can be changed relative to each other.
Therefore, the movement of the door in the closing direction can be made gentle. In addition, the second conduction path is composed of a solenoid valve that can open and close the flow path and a check valve installed on the first oil chamber side, so when the door is completely closed, the flow path is shut off and the piston is closed. The door closer can be prevented from moving, the door closer can be locked inoperable when the door is closed, and it can also be easily released.

Moreover, these operations can be performed by inputting a code number, magnetic card, IC card, etc. into a control panel such as a numeric keyboard, so only specific people such as family members can operate the device. First, it can be extremely safe in terms of crime prevention.

By incorporating an electronic circuit that can be controlled by input signals to the operation panel and operating the channel opening/closing mechanism via this circuit, input signals such as recited numbers can be made variable. In addition, the door closer can be set to activate an alarm when a signal other than the preset signal is input, which is extremely effective in establishing home security. can do.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention.
The figure is a longitudinal sectional view of the door in the closed state, and FIG. 2 is a longitudinal sectional view of the door in the open state. 1...Housing, 2...Cylinder chamber, 3...
...Piston, 4...Compression spring, 5...First oil chamber,
6... Second oil chamber, 7... Pinion chamber, 8... Pinion, 9... Rack, 10... Side wall, 11... Cavity, 12... Base, 13... First conduction path, 1
4...Second conduction path, 15, 16...Opening, 17
... Solenoid valve, 18 ... Check valve, 19 ... Support shaft, 2
0... Through hole, 21... Flow rate adjustment valve, 22... Channel opening/closing mechanism, 23... Ball valve.

Claims (1)

[Scope of utility model registration request] In the cylinder chamber provided in the housing, a piston linked to the opening and closing of the door and a compression spring for applying a pressing force to the piston are disposed, and the cylinder chamber is divided into two by the piston. Of each compartment, one side, which is the pressure side of the compression spring, is the first oil chamber, and the other side is the second oil chamber, and the spaces between the first oil chamber and the second oil chamber are separated. Of the first conduction path and the second conduction path, which are arranged so as to be able to communicate with each other, the first conduction path communicates with the first oil chamber through the opening on the housing side when the door is opened, and with the first oil chamber through the opening on the housing side when the door is closed. The opening and the passage hole on the piston side face each other to enable communication with the second oil chamber, and the second conduction path is formed between the electromagnetic valve and the inverse passage provided in the opening on the first oil chamber side. What is claimed is: 1. A door closer comprising a stop valve and a flow path opening/closing mechanism that blocks the flow path and prevents movement of the piston when the door is closed to enable communication between the flow path opening and closing mechanism.