JP2011064013A - Door closer - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enhance durability by preventing the damage and deformation of a movable member due to an impact and a load when a fixed member and the movable member are engaged in closing a door regarding a door closer for guiding closing of the door installed in a house, furniture, or the like. <P>SOLUTION: The door closer installed between the door D and a door frame F for supporting the door D includes the fixed member 1 mounted to the door D, and the movable member 2 mounted to the door frame F through a speed reducing mechanism 3. The movable member 2 is engaged with the fixed member 1 when the door D is closed, and turned while allowing the fixed member 1 to slide. The speed reducing mechanism 3 elastically holds the movable member 2 in an engagement start position with the fixed member 1 and decelerates turning of the movable member 2. In the movable member 2, an engaging arm 22 engaged with the fixed member 1 is turnably connected to a main arm 21 connected to the speed reducing mechanism 3, through a pin 24. A sub-arm 23 turning in the same direction as the main arm 21 is turnably connected to the engaging arm 22 of the movable member 2 through a pin 25 in a position distant from the main arm 21. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention belongs to a technical field related to a door closer that guides closing of a door installed in a house, furniture, or the like.

  Doors installed in houses, furniture, and the like have been provided with door closers having a guide function for reducing the closing speed of the doors and closing the doors securely.

  This door closer is installed between the door, which is a movable structure, and the door frame, which supports the door, which is a fixed structure, and it becomes an obstacle to opening and closing the door if it cannot be installed precisely. Therefore, the installation work is troublesome. For this reason, there is a demand for the development of a door closer that can be easily attached.

  Conventionally, as a door closer aimed at facilitating installation work, for example, those described in Patent Documents 1 and 2 are known.

  In Patent Documents 1 and 2, a door is installed between a door and a door frame that supports the door, a fixing member attached to one of the door and the door frame, and a speed reduction mechanism on the other of the door and the door frame. A movable member that is attached via the movable member, and the movable member is rotated while engaging the fixed member and allowing the fixed member to slide when the door is closed. There is described a door closer that is elastically held at an engagement start position with a fixed member and decelerates the rotation of the movable member.

  In the door closer according to Patent Documents 1 and 2, a member that is attached to a door that is a movable structure and a door frame that supports the door that is a fixed structure is a fixed member and a movable member that are engaged when the door is closed. By separating, the installation work is facilitated.

JP 2006-283460 A JP 2007-120140 A

  In the door closers according to Patent Documents 1 and 2, since the movable member is composed of a single linear or curved arm, the movable member is moved by the impact and load at the time of engaging the stationary member and the movable member when the door is closed. Since it is easily damaged and deformed, there is a problem that durability is low.

  The present invention has been made in consideration of such problems, and is durable by preventing the movable member from being damaged or deformed by an impact or load when the stationary member or the movable member is engaged when the door is closed. It is an object to provide a door closer with improved performance.

  In order to solve the above-described problems, the present invention is installed between a door and a door frame that supports the door, and includes a fixing member attached to one of the door and the door frame, and the door and the door frame. And a movable member mounted on the other side through a speed reduction mechanism. The movable member engages with the fixed member when the door is closed and is rotated while allowing the fixed member to slide. In a door closer that is elastically held at an engagement start position with a fixed member and decelerates the rotation of the movable member, the movable member engages with the fixed member via a pin on a main arm connected to the speed reduction mechanism. The joint arm is pivotably connected, and the engaging arm of the movable member is pivotally connected to the sub arm that pivots in the same direction as the main arm via a pin at a position away from the main arm. Adopt the features To.

  In this means, the movable member is constituted by a four-point link structure including a main arm, an engagement arm, and a sub arm, so that the fixed member at the time of closing the door on the engagement arm, the impact and the load when the movable member is engaged. Is distributed to the main arm and sub-arm.

  In the present invention, a means is adopted in which the main arm and the sub arm of the movable member have a common size and shape.

  In this means, the four-point link structure formed on the movable member becomes a parallel link structure that translates the engagement arm.

  In the present invention, the engaging arm of the movable member employs means in which the engaging start portion of the fixed member is disposed between both pins connected to the main arm and the sub arm.

  In this means, the impact and load when the fixed member and the movable member are engaged in closing the door on the engagement arm are dispersed in the opposite direction of the engagement arm of the movable member.

  In the present invention, the fixed member includes a rod-shaped slide pin, and the engaging arm of the movable member is formed with a guide groove on which the slide pin of the fixed member slides, and is formed on the groove wall of the guide groove from the slide terminal end to the front. A means is provided that is provided with a cut-out portion that allows the slide pin to be detached.

  In this means, the slide pin of the fixed member is detached from the cut portion of the guide groove of the engaging arm of the movable member, so that the door that has released the engagement of the fixed member and the movable member can be closed.

  The door closer according to the present invention has a four-point link structure including a main arm, an engagement arm, and a sub arm on the movable member, so that the stationary member and the movable member are engaged when the door is closed on the engagement arm. Since the impact and load are distributed to the main arm and sub arm, it is possible to improve the durability by preventing the movable member from being damaged or deformed by the impact and load when the fixed member and the movable member are engaged when the door is closed. There is an effect that can be done.

It is a bottom view of the form for carrying out the door closer concerning the present invention. FIG. 2 is an engagement start state diagram of a fixed member and a movable member in FIG. 1. FIG. 2 is a closed state diagram of the door in FIG. 1. It is a perspective view of the principal part of FIG. FIG. 4 is an enlarged sectional view taken along line XX in FIG. 3. FIG. 4 is another operation diagram in FIG. 3. FIG. 6 is still another operation diagram in FIG. 3. FIG. 2 is a partial cutaway view of a main part of FIG. 1.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the door closer which concerns on this invention is demonstrated based on drawing.

  In the first example, a hinge H is attached between the side plate of the door frame F and the front end of the door D, and the door D is installed in a door device that is rotated around the hinge H and opened and closed in the horizontal direction. Is shown.

  The first example includes a fixed member 1, a movable member 2, and a speed reduction mechanism 3. The fixed member 1 is attached to a door D that is a movable structure, and the movable member 2 and the speed reduction mechanism 3 are a door D that is a fixed structure. Is attached to a door frame F that supports the

  As shown in detail in FIGS. 5 to 7, the fixing member 1 is attached to the upper part of the back surface (front surface) of the door D, and is orthogonal to the attachment base 11 that is in contact with the door D and fixed with screws or the like. A trigger arm 14 on which a slide pin 13 is supported is fitted and assembled to a mounting arm 12 that protrudes in the direction in which it slides. The mounting base 11 can adjust the mounting position in the vertical direction and the horizontal direction of the door D through the long hole. The mounting arm 12 is formed separately from the mounting base 11 and assembled, and those having different projection lengths are selected corresponding to the thickness of the door D, the width of the door frame F, and the like. The slide pin 13 is formed in a round bar shape, is supported by the trigger arm 14 via the coil spring 15, and has a function of retracting toward the inside of the trigger arm 14 against the coil spring 15. The trigger arm 14 can be slid in the protruding direction of the mounting arm 12, and the fitting assembly position can be adjusted in the protruding direction of the mounting arm 12. The fitting assembly position of the trigger arm 14 is fixed by being fastened to the mounting arm 12 with a screw 16.

  The movable member 2 is connected to a speed reduction mechanism 3 which will be described in detail later. A main arm 21, an engagement arm 22, and a sub arm 23 are assembled so as to be rotatable by pins 24 and 25. The main arm 21 is made of a square-shaped plate material, one end of which is connected to the speed reduction mechanism 3 and is elastically held so that the other end protrudes slightly in the opening direction of the door D, and the other end is a pin 24. Is connected to one end of the engagement arm 22 in a rotatable manner. As shown in detail in FIGS. 4 to 7, the engagement arm 22 is made of a substantially straight plate material formed of a synthetic resin material, and extends in the length direction to the tip of the slide pin 13 of the fixing member 1. A guide groove 22a that accommodates and slides the portion is provided. An engagement start portion 22b of the guide groove 22a with the slide pin 13 of the fixing member 1 is bent into a square shape from the guide groove 22a and opened to the side portion of the engagement arm 22. From the slide terminal end of the slide pin 13 of the fixing member 1 of the guide groove 22a to the front, the groove wall on the closing side of the door D is removed to provide a cutout portion 22c. A taper surface 22d inclined from the groove wall on the closing side of the door D to the side of the engagement arm 22 is provided from the sliding end of the slide pin 13 of the fixing member 1 of the guide groove 22a to the front. Further, the engagement arm 22 is provided with a guide groove 22a and the like symmetrically on the front and back surfaces, and can be used in common even if the right and left are different. The sub arm 23 is formed in the same shape and size as the main arm 21, and is connected to the speed reduction mechanism 3 at one end and supported so as to be freely rotatable. The other end of 22 is rotatably connected.

  As shown in detail in FIG. 8, the speed reduction mechanism 3 is attached to the side plate of the upper plate of the door frame F, and is fixed to one end portion of the main arm 21 of the movable member 2 on the casing 31 serving as an attachment base. The cam shaft 32 is rotatably supported, and a coil spring 33 and a damper 34 are linked to the cam shaft 32. The casing 31 is formed of a rectangular box, the upper surface is in contact with the upper plate of the door frame F, and the movable member 2 is connected to the lower surface side. Note that one end of the sub arm 23 of the movable member 2 is rotatably supported by the casing 31. The camshaft 32 is provided with two cam claws that contact the pushers 35 and 36 attached to the coil spring 33 and the damper 34 through a certain angle. The coil spring 33 elastically biases the cam shaft 32 (the main arm 21 of the movable member 2) in the closing direction of the door D. The coil spring 33 is provided with an elastic adjustment section 37 that adjusts the elastic biasing force by expanding and contracting the axial length. The damper 34 is of a fluid pressure type, and serves as a resistance against the above-described elastic biasing of the coil spring 33 and maintains the elastic holding that slightly protrudes in the opening direction of the door D of the main arm 21 of the movable member 2. The damper 34 can be attached to and detached from the inside of the casing 31 together with a part of the casing 31 that can be attached and detached.

  When the door D is opened in this form, the fixed member 1 and the movable member 2 are in the state shown in FIG.

  In the state shown in FIG. 1, the movable member 2 protrudes from the speed reduction mechanism 3 to the door D side, the engagement arm 22 of the movable member 2 is parallel to the door frame F, and the engagement arm 22 is released. The start portion 22b is positioned on the rotation locus L of the slide pin 13 of the fixing member 1 with the hinge H as the center.

  When the door D is closed from the state shown in FIG. 1, the slide pin 13 of the fixed member 1 enters the engagement start portion 22 b of the engagement arm 22 of the movable member 2 as shown in FIG. 2. At this time, the impact of the engagement of the fixed member 1 and the movable member 2 is that the engagement arm 22 of the movable member 2 is formed of a synthetic resin material having a higher shock absorbing capacity than the metal material. Since the engagement start portion 22b of the joint arm 22 is positioned on the rotation locus L of the slide pin 13 of the fixing member 1 and the engagement resistance is low, the engagement is reduced considerably. Accordingly, the movable member 2 is not damaged or deformed, and durability is increased.

  Further, as the closing of the door D proceeds, as shown in FIG. 3, the slide pin 13 of the fixed member 1 slides in the guide groove 22a of the engaging arm 22 of the movable member 2, and the movable member 2 moves to the speed reduction mechanism 3 side. Is rotated. At this time, the load of engagement between the fixed member 1 and the movable member 2 is that the movable member 2 has a parallel link structure, the parallelism of the engagement arm 22 to the door frame F is maintained, and the posture does not change. Since the slide pin 13 of the member 1 slides in the guide groove 22a of the engagement arm 22 of the movable member 2 between the connecting portions of the main arm 21 and the sub arm 23, both the main arm 21 and the sub arm 23 in the opposite direction are used. It will be surely distributed. Accordingly, the movable member 2 is not damaged or deformed, and durability is increased.

  Note that the rotation of the movable member 2 as the door D is closed is decelerated by the speed reduction mechanism 3 and is reliably continued to cause the door D to be completely closed.

  However, when it is desired to quickly close the door D in the middle of the closing of the door D, as shown in FIG. The slide pin 13 of the fixed member 1 sliding in the guide groove 22a of the engagement arm 22 is detached from the cutout portion 22c of the engagement arm 22 to the outside of the movable member 2. As a result, the engagement of the fixed member 1 and the movable member 2 is released, and the door D can be closed without being restricted by the fixed member 1 and the movable member 2.

  Further, when the movable member 2 has been rotated to the state shown in FIG. 3 while the door D is opened, as shown in FIG. 7, it is fixed by pushing and pulling the door D strongly in the closing direction. The slide pin 13 of the member 1 is advanced and retracted along the tapered surface 22d of the engagement arm 22 of the movable member 2 to get over the groove wall of the guide groove 22a, and the slide pin 13 of the fixed member 1 is engaged with the engagement arm of the movable member 2. It is possible to engage with the 22 guide grooves 22a.

  As described above, the fixed member 1 can be attached to the door frame F, and the movable member 2 and the speed reduction mechanism 3 can be attached to the door D in addition to the illustrated form.

  Further, the shape and size of the main arm 21 and the sub arm 23 of the movable member 2 can be made different to form a four-point link structure other than the parallel link structure.

  Furthermore, the slide pin 13 may be arranged on the upper side of the engagement arm 22.

DESCRIPTION OF SYMBOLS 1 Fixed member 13 Slide pin 2 Movable member 21 Main arm 22 Engagement arm 22a Guide groove 22b Engagement start part 22c Cutting part 23 Subarm 24,25 Pin 3 Deceleration mechanism D Door F Door frame

Claims (4)

A fixed member attached to one of the door and the door frame, and a movable member attached to the other of the door and the door frame via a speed reduction mechanism; The movable member engages with the fixed member when the door is closed and is rotated while allowing the fixed member to slide, and the speed reduction mechanism elastically holds the movable member at the engagement start position with the fixed member. In addition, in the door closer that decelerates the rotation of the movable member,
The movable member is rotatably connected to a main arm that is connected to the speed reduction mechanism via a pin, and an engagement arm that engages the fixed member via the pin. The engagement arm of the movable member is spaced from the main arm via the pin. And a sub-arm that is pivotally connected to the main arm in the same direction as the main arm.   2. The door closer according to claim 1, wherein the main arm and the sub arm of the movable member have a common size and shape.   3. The door closer according to claim 1 or 2, wherein the engaging arm of the movable member has an engaging start portion of the fixed member disposed between both pins connected to the main arm and the sub arm.   The door closer according to any one of claims 1 to 3, wherein the fixed member includes a rod-shaped slide pin, and the engaging arm of the movable member is formed with a guide groove in which the slide pin of the fixed member slides, from the slide end of the slide pin to the front. A door closer characterized in that a cutout portion is provided on the groove wall of the guide groove to enable the slide pin to be detached.

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