JP2005320812A - Door closer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent another person from intruding inside a door against will, by instantly locking the door from the inside of the door when necessary so as to be unopenable and unclosable, after a person staying inside the door unlocks the door. <P>SOLUTION: A door closer body 15 is installed in one of the door 11 and an opening part frame 13. The door closer body has an oil damper 17. A piston rod 19 of the oil damper is associated to the other of the door and the opening part frame. The oil damper has an adjusting means for adjusting an opening-closing speed of the door or locking the door so as to be unopenable and unclosable by rotating an adjusting screw 21. The adjusting screw is arranged on one end of the door closer body. A tip part 23a of a rotation transmitting cable 23 is connected to the adjusting screw. A base end part 23b of the rotation transmitting cable is arranged in a position easily operable by a person on the inside of the opening part frame. The base end part has a rotational operation part 25. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a door closer, and in particular, when a person inside the door unlocks the door or when the door is unlocked and the door chain is removed, the door is rapidly opened from the outside. The present invention relates to a door closer that solves the problem of entering inside the door.

  The door closer is conventionally attached to an entrance door. The door closer is designed to safely close the door at a low speed by adjusting the speed at which the door is closed after the door is opened.

  Japanese Patent Laying-Open No. 2003-193740 discloses a door closer using an oil damper. In the door closer, the main body side of the oil damper is attached to one of the door and the opening frame to which the door is attached, and the piston rod side of the oil damper is connected to the other.

  In general, as shown in FIG. 7, the door closer has a door closer body 1 having an oil damper attached to the door 3, a piston rod of the oil damper is provided with a rack, the rack is engaged with a pinion, and the pinion The shaft 5 is connected to one end 7 a of the link 7, and the other end 7 b of the link 7 is connected to the opening frame 9. Further, the door closer is provided with an adjusting screw for adjusting means for adjusting the opening / closing speed of the door or locking the door so that the door cannot be opened / closed at one end 1 a of the door closer body 1.

A rotation transmission cable for rotating a predetermined member by remote control is disclosed in Japanese Patent Laid-Open No. 5-65915.
JP 2003-193740 A Japanese Patent Laid-Open No. 5-65915

  The conventional door closer is provided with an adjusting screw of the adjusting means at one end of the door closer body, and this adjusting screw is rotated by a screw driver. Therefore, after unlocking the door, the speed at which the door opens cannot be instantaneously adjusted by the adjusting means, or the door cannot be instantly locked by the adjusting means. In other words, in the conventional door closer described above, there is a possibility that the door is rapidly opened from the outside at the moment when the person inside the door unlocks the door and enters the door. If someone intrudes inside the door against your will, the person inside the door may be at risk of robbery and other crimes.

  In the present invention, after a person inside the door unlocks the door, if necessary, the door is instantly locked from the inside of the door so that the door cannot be opened and closed, so that another person enters the door unintentionally. This is an attempt to provide a door closer that prevents this.

  In order to solve the above problems, the present invention provides the following door closer.

(1) A door closer body is attached to either the door or an opening frame to which the door is attached, the door closer body is provided with an oil damper, and the piston rod of the oil damper is attached to the door and the door. The oil damper is further provided with adjusting means for adjusting the opening / closing speed of the door by rotating an adjusting screw or locking the door so that the door cannot be opened / closed. In the door closer where the screw is arranged at one end of the door closer body,
The tip of the rotation transmission cable is connected to the adjustment screw, and the base end of the rotation transmission cable is disposed at a position that is easy for a person to operate inside the opening frame, and the rotation operation unit is provided at the base end. A door closer characterized in that it is provided (claim 1).

(2) The piston rod of the oil damper is provided with a rack and a return spring, a pinion is engaged with the rack, a wire drum is attached to the shaft of the pinion, and the tip of the wire wound around the wire drum is connected to the door and the door It connects with said other with the opening part frame in which the door is attached (Claim 2).

(3) The rotation transmission cable can be retrofitted to an adjustment screw in an existing door closer.

[Operation of the invention]
[Invention of Claim 1]
By adjusting the rotation screw at the base end of the rotation transmission cable and rotating the adjustment screw of the oil damper, the speed of opening the door is always adjusted to be extremely low.

  When a person inside the door (hereinafter referred to as “the person”) senses a person outside the door (hereinafter referred to as “other person”) and unlocks the door, the other person attempts to open the door. The door opening speed is extremely low.

  If the person decides that he / she does not want to put another person inside the door when the door is slightly opened, he / she will not be able to operate the rotation transmission cable provided at a position that is easy for the person to operate inside the opening frame. By immediately operating the rotary operation unit and rotating the adjustment screw of the oil damper, the door is instantly locked so that it cannot be opened and closed, and the door is prevented from opening any further. As a result, others cannot enter the door.

  In this state, the person immediately contacts the police officer and others and seeks rescue.

  On the other hand, when the door is opened slightly and the person determines that another person can enter inside the door, the person operates the rotation operation part of the rotation transmission cable to rotate the adjustment screw of the oil damper. Let the door open quickly. As a result, others can easily open the door and enter inside the door.

[Invention of claim 2]
When another person tries to open the door, the wire is pulled in the direction in which the wire is unwound from the wire drum. Accordingly, the wire drum rotates together with the pinion, and the rack meshing with the pinion moves in the direction of pushing the piston rod into the oil damper and compresses the return spring. See FIG.

(B) Adjusting the speed at which the piston rod is pushed into the oil damper, that is, the door opening speed, by operating the rotation operation part of the rotation transmission cable and rotating the adjustment screw of the oil damper, or (b) The piston rod can be stopped so that the piston rod is not pushed into the oil damper, that is, the door can be locked so that it cannot be opened and closed.

The return spring always urges the piston rod in a direction away from the oil damper. That is, when the door is closed, the return spring moves the piston rod and the rack away from the oil damper against the force of the oil damper, and the pinion meshed with the rack is opposite to the above together with the wire drum. The wire drum winds the wire. Therefore, the door is closed.

In other respects, the invention of claim 2 has the same operation as that of the invention of claim 1.

[Invention of claim 3]
Since the rotation transmission cable is retrofitted to the adjustment screw in the existing door closer, the invention of claim 3 can be implemented at a very low cost.

  In other respects, the invention of claim 3 has the same operation as that of the invention of claim 1.

  As described above, according to the present invention, when a person inside the door unlocks the door and then decides to prevent the intrusion of others outside the door, By immediately operating the rotation operation part of the rotation transmission cable arranged at a position where humans can easily operate and rotating the adjustment screw of the oil damper, the door is instantly locked so that it cannot be opened and closed. Therefore, it is possible to prevent others from intruding into the inside of the door. In other words, according to the present invention, it is possible to protect a person inside the door from robbery and other crimes by preventing another person from intruding into the inside of the door.

  The door closer of the present invention is common to the conventional door closer in the following points.

  That is, in the door closer of the present invention, the door closer body 15 is attached to one of the door 11 and the opening frame 13 to which the door 11 is attached, as in the case of the conventional door closer. Comprises an oil damper 17, the piston rod 19 of the oil damper 17 is related to the other of the door 11 and the opening frame 13 to which the door 11 is attached, and the oil damper 17 further rotates the adjusting screw 21. Thus, an adjusting means for adjusting the opening / closing speed of the door 11 or locking the door 11 so as not to be opened / closed is provided, and the adjusting screw 21 is disposed at one end of the door closer body 15.

  Therefore, in the present invention, the distal end portion 23a of the rotation transmission cable 23 is connected to the adjustment screw 21, and the proximal end portion 23b of the rotation transmission cable 23 is easily operated by a person inside the opening frame 13. The base end 23b is provided with a rotation operation unit 25.

  As an example, the rotation transmission cable 23 is formed by inserting a multi-coil spring through a flexible sleeve. Each of the multiple coil springs is composed of an inner coil spring and an outer coil spring each wound with a spring metal wire, and the inner coil spring is wound in a direction opposite to the outer coil spring.

  What is indicated by reference numeral 27 is a holding means for holding the base end portion 23 b of the rotation transmission cable 23. What is shown by the code | symbol 29 is a door hinge which supports the door 11 so that opening and closing is possible.

  The case shown in FIGS. 1 to 3 will be described.

  A rack 31 and a return spring 33 are provided on the piston rod 19 of the oil damper 17, a pinion 35 is engaged with the rack 31, a wire drum 39 is attached to the shaft 37 of the pinion 35, and the wire drum 39 is wound around the wire drum 39. The tip 41a of the wire 41 is connected to the other of the door 11 and the opening frame 13 to which the door 11 is attached via the attachment means 43.

  As the rack 31, for example, a round rack is used. What is indicated by reference numeral 45 is an end plate of the return spring 33.

  In the example shown in FIG. 4, the rotation transmission cable 23 is retrofitted to the adjusting screw 21 in the existing door closer shown in FIG.

  5 and 6 show an example of the oil damper 17, and the oil damper 17 will be described below.

An inner cylinder 53 is disposed in the body cylinder 51, and the piston head 55 of the piston rod 19 is slidably fitted into the inner cylinder 53. A return spring 59 is attached between the inner cylinder end constituting member 57 and the piston head 55 in the inner cylinder 53. What is indicated by reference numeral 61 is a bearing for supporting the piston rod 19.

A gap 63 is formed between the inner surface of the body cylinder 51 and the outer surface of the inner cylinder 53. A first passage that penetrates the piston head 55 through the front portion 65a in front of the piston head 55 in the inside 65 of the inner cylinder 53 (the portion to which the return spring 59 is attached in the inside 65 of the inner cylinder 53) and the gap 63. 67 and the second passage 69 penetrating the inner cylinder 53. The first passage 67 communicates the front part 65 a in front of the piston head 55 in the interior 65 of the inner cylinder 53 and the rear part 65 b in the interior 65 of the inner cylinder 53 behind the piston head 55. The second passage 69 allows the gap 63 to communicate with the rear portion 65 b in the inside 65 of the inner cylinder 53. A check ball 71 is movably disposed in the first passage 67.

The oil damper 17 includes adjusting means for adjusting the opening / closing speed of the door 11 by rotating the adjusting screw 21 or locking the door 11 so that the door 11 cannot be opened / closed. That is, the inner cylinder end constituting member 57 is provided with a through hole 73 communicating from the inside 65 of the inner cylinder 53 to the outside of the body cylinder 51, and a female screw 75 is formed in the through hole 73. 21 male threaded portions 77 are screwed together. An adjustment ball 79 is connected to the inner end of the male screw portion 77. The adjustment ball 79 is located in the through hole 73.

The through hole 73 and the gap 63 are communicated with each other through the third passage 81.

A foam accumulator 83 such as a sponge is disposed in the gap 63.

The inside 65 and the gap 63 of the inner cylinder 53 are filled with oil.

When the door 11 is closed, the oil damper 17 is in the state shown in FIG. When the door 11 is opened from this state, the piston rod 19 is pushed into the oil damper 17, and the piston head 55 compresses the return spring 59 and approaches the inner cylinder end component member 57 in the inner cylinder 53. move on. When the piston head 55 starts to move in this direction, the check ball 71 closes the first passage 67. Then, the oil in the front portion 65 a in the inner 65 of the inner cylinder 53 flows into the gap 63 through the through hole 73 and the third passage 81. Part of the oil that has flowed into the gap 63 passes through the second passage 69 and enters the rear portion 65b in the inner portion 65 of the inner cylinder 53. When the rear portion 65b is filled with oil, the oil in the gap 63 becomes foam accumulation. Compressor 83 is compressed. The foam accumulator 83 is compressed according to the volume of the piston rod 19 pushed into the inside 65 of the inner cylinder 53. See FIG.

When the force to open the door 11 is released, the return spring 59 returns the piston rod 19 in the opposite direction together with the return spring 33. When the piston rod 19 starts to move in the opposite direction, the check ball 71 in the first passage 67 moves in the direction to open the first passage 67, and the oil in the rear portion 65b in the inner portion 65 of the inner cylinder 53 is the first. It flows through the passage 67 and into the front portion 65 a in the interior 65 of the inner cylinder 53. The oil in the gap 63 flows through the third passage 81 and the through hole 73 into the front portion 65 a in the inside 65 of the inner cylinder 53. The foam accumulator 83 in the compressed gap 63 expands.

By rotating the adjusting screw 21, the adjusting ball 79 advances and retreats in the through hole 73, and the amount of oil that can pass through the through hole 73 is regulated. That is, when the adjusting screw 21 is rotated so that the amount of oil that can pass through the through hole 73 is increased, the piston rod 19 becomes easy to move and the opening / closing speed of the door 11 is increased. When the adjusting screw 21 is rotated so that the amount of oil that can pass through the through hole 73 is reduced, the piston rod 19 becomes difficult to move and the opening / closing speed of the door 11 is reduced. When the adjusting screw 21 is rotated so that the adjusting ball 79 closes the through hole 73, the movement of the piston rod 19 is blocked and the door closer 1 is locked so as not to be opened and closed.

It is a top view which shows an example of the door closer by this invention. It is a front view of a door closer same as the above. It is a front view which shows the state which attached the door closer same as the above to the door. It is a front view which shows the state which attached another door closer by this invention to the door. It is sectional drawing which shows an example of an oil damper. It is another sectional drawing of an oil damper same as the above. It is a front view which shows the state which attached the conventional door closer to the door.

Explanation of symbols

1 door closer body 1a one end 3 door 5 shaft 7 link 7a one end 7b other end 9 opening frame 11 door 13 opening frame 15 door closer body 17 oil damper 19 piston rod 21 adjustment screw 23 rotation transmission cable 23a distal end 23b base end Portion 25 Rotating operation portion 27 Holding means 31 Rack 33 Return spring 35 Pinion 37 Shaft 39 Wire drum 41 Wire 41a Tip 43 Mounting means 45 End plate 51 Body cylinder 53 Inner cylinder 55 Piston head 57 Inner cylinder end component 59 Return spring 61 Bearing 63 Clearance 65 Internal 65a Front 65b Rear 67 First passage 69 Second passage 71 Check ball 73 Through hole 75 Female thread 77 Male thread 79 Adjustment ball 81 Third passage 83 Foam accumulator

Claims (3)

A door closer body is attached to either the door or an opening frame to which the door is attached. The door closer body includes an oil damper, and the piston rod of the oil damper is attached to the door and the door. The oil damper is further provided with adjusting means associated with the other of the opening frame, and the oil damper adjusts the opening / closing speed of the door by rotating the adjusting screw or locks the door so that the door cannot be opened / closed. In the door closer placed at one end of the closer body,
The tip of the rotation transmission cable is connected to the adjustment screw, and the base end of the rotation transmission cable is disposed at a position that is easy for a person to operate inside the opening frame, and the rotation operation unit is provided at the base end. A door closer characterized by having it.   The piston rod of the oil damper is provided with a rack and a return spring, a pinion is meshed with the rack, a wire drum is attached to the shaft of the pinion, and the end of the wire wound around the wire drum is attached to the door and the door The door closer according to claim 1, wherein the door closer is connected to the other of the opening frame.   The door closer according to claim 1, wherein the rotation transmission cable is retrofitted to an adjustment screw in an existing door closer.