JP5588639B2 - Door closer - Google Patents

Description

  The present invention relates to an improvement in a door closer (door self-closing device) that slowly and automatically closes an open door, and more particularly to a door closer that can adjust a positional relationship of a link mechanism with respect to a door surface and a door closer body.

  Generally, the door closer includes a housing having a sealed space filled with hydraulic oil, and a piston urged by a coil spring is disposed in the sealed space of the housing so as to be capable of reciprocating. Further, a rack and pinion mechanism is assembled to the piston, and a rotation shaft is coupled to the pinion of the rack and pinion mechanism so as to penetrate the housing. Further, one end of the link mechanism is connected to the upper end of the rotating shaft, and the other end of the link mechanism is connected to the upper frame side of the door opening of the building via a bracket.

  When the door is opened, the rotational operation is transmitted to the rotary shaft via the link mechanism, and further converted into a linear motion of the piston via the rack and pinion mechanism. As a result, when the piston moves in the sealed space of the housing to compress the coil spring, and the hand is released from the door, the door automatically closes slowly and automatically due to the repulsive force of the compressed coil spring. Yes. The closing speed of the door is adjusted by controlling the flow rate of the hydraulic oil that flows in conjunction with the movement of the piston with a speed adjusting valve.

  By the way, this type of door closer has a configuration for adjusting the length of the arm in at least one of the two arms constituting the link mechanism as in Patent Document 1 below. Since it has a structure to adjust the length of the arm, even if there is a problem with the dimensional accuracy of the door or door frame or the position of the mounting hole when installing the door closer, the arm length is adjusted to The positional relationship of the link mechanism with respect to the door closer body can be adjusted to the original one.

JP-A-7-269219

  In the case of a door closer that places emphasis on designability, both the two arms constituting the link mechanism are required to have a seamless shape. However, the configuration for adjusting the length of the arm is that the arm is a set of the inner linkage and the outer linkage, and both linkages are expanded and contracted with each other, so the length of the arm is adjusted to the link mechanism. However, there is a problem that the arm cannot be formed into a seamless shape when the configuration is provided. Although it is possible to adjust the positional relationship of the link mechanism with respect to the door surface and door closer body by making the mounting hole of the bracket a long hole without providing a structure for adjusting the arm length in the link mechanism. Brackets may shift due to sudden opening and closing of the door, which is impractical.

  The present invention has been made in view of the above points, and the object of the present invention is to provide a link mechanism for a door surface or a door closer body even when the link mechanism is not provided with a configuration for adjusting the length of the arm. It is to provide a door closer that can adjust the positional relationship of the door.

The present invention relates to a door closer 1 having a door closer body 2, a bracket 30, and a link mechanism 20 having one end 21 a connected to the rotating shaft of the door closer body 2 and the other end 22 b connected to the bracket 30. 30 includes a support bracket 31 which recess 31B is formed on the bottom surface 31b, the position relative to the bracket 30 adjustable slide member 40 is provided, the slide member 40 includes a body portion 40A, the bottom surface of the support bracket 31 An extending portion 40B that contacts the 31b and closes the recess 31B of the support fitting 31, and a shaft portion 40C to which the other end 22b of the link mechanism 20 is connected, for adjusting the position of the slide member 40 An adjustment screw 32 is screwed into the main body portion 40A of the slide member 40 in the recess 31B of the support fitting 31, and the adjustment screw 32 The slide member 40 is door closer slides by work.

Here, the support fitting 31 is preferably formed integrally with the bracket 30 .

  According to the present invention, since the movable member that can adjust the position with respect to the bracket is provided and the link mechanism is connected to the movable member, even if the length of the arm constituting the link mechanism cannot be adjusted. There are effects that the positional relationship of the link mechanism with respect to the door surface and the door closer body can be adjusted.

It is a top view of the state where the door closer concerning the embodiment of the present invention was attached to the door and the upper frame. It is a front view of FIG. It is a side view of FIG. It is a principal part disassembled perspective view of the door closer which concerns on embodiment of this invention. It is principal part sectional drawing of the door closer which concerns on embodiment of this invention. It is principal part sectional drawing of the door closer which concerns on embodiment of this invention, and is a figure which shows the state which the slide member slid. It is a top view of the state which attached the door closer which concerns on embodiment of this invention to a door and an upper frame, and is a figure which shows the state which the mounting position of the bracket shifted | deviated to the left direction. It is a top view of the state which attached the door closer concerning the embodiment of the present invention to a door and an upper frame, and is a figure showing the state where the attachment position of a brat shifted rightward.

  Embodiments of the present invention will be described with reference to the drawings. 1-3, 101 shows the door opening part of a building, and this door opening part 101 is the space enclosed by the rectangle by the upper frame 102, a pair of right and left eaves frame 103, and a lower frame (not shown). The door 104 is attached to the one frame 103 via a hinge 105 so that the door opening 101 can be opened and closed. The door 104 is automatically and slowly closed from the open state by the door closer 1 according to the embodiment of the present invention.

  The door closer 1 has a housing 2 as a door closer body. As shown in FIG. 1, the housing 2 is attached to the upper end of the door 104 via the attachment fitting 3. As shown in FIG. 3, the mounting bracket 3 is attached to the upper end of the door 104 by screwing a screw 4 passing through the mounting bracket 3 into a mounting plate 106 inside the door 104. As shown in FIG. 1, a screw insertion hole 2 a is formed in the housing 2, and a screw hole 3 a is also formed in the mounting bracket 3. After hooking a hook (not shown) of the mounting bracket 3 on a pin (not shown) of the housing 2, the screw 5 is screwed into the screw insertion hole 2 a of the housing 2 and the two screw holes 3 a of the mounting bracket 6. By doing so, the housing 2 is attached to the upper end of the door 104 via the attachment fitting 3. The configuration inside the housing 2 is the same as the configuration described in the background art, and thus the description thereof is omitted.

  One end of a link mechanism 20 is connected to the upper end of a rotating shaft (not shown) that is integrally connected to a pinion of a rack and pinion mechanism (not shown) incorporated in the housing 2, and the link mechanism The other end of 20 is connected to the upper frame 102 side of the door opening 101 of the building. Specifically, the link mechanism 20 includes a main arm 21 and a connecting arm 22, and one end 21 a of the main arm 21 is connected by a shaft (not shown) at the upper end of a rotating shaft (not shown). One end 22 a of the connecting arm 22 is rotatably connected to the other end 21 b around the shaft 23. As shown in FIGS. 2 and 3, the bracket 30 is attached to the upper frame 102 by screwing four screws 15 into the mounting plate 107 inside the upper frame 102. The other end 22b of the connecting arm 22 is rotatably connected to a slide member 40 provided so as to be adjustable. Both the main arm 21 and the connecting arm 22 have a seamless flat shape.

  As shown in FIG. 4, a screw insertion hole 30a is formed at the base end of the bracket 30 to be inserted into the screw 15 described above, and a square hole 30b is formed at the tip. Reference numeral 31 denotes a support fitting, and a substantially quadrangular protruding portion 31 </ b> A is formed on the upper surface 31 a of the support fitting 31. The support fitting 31 is integrated with the bracket 30 by press-fitting or welding the protruding portion 31 </ b> A into the hole 30 b of the bracket 30.

  As shown in FIGS. 4 and 5, a recess 31 </ b> B for accommodating the slide member 40 is formed on the bottom surface 31 b of the support fitting 31. Further, a hole 31C into which an adjustment screw 32 (to be described later) is inserted is formed in the left side surface 31c and the right side surface 31d of the support bracket 31 so as to communicate with the recess 31B. A hole 31D for press-fitting 33 is formed to communicate with the hole 31C on the right side 31d side. Further, a screw hole 31E screwed with a set screw 34 described later is formed on the rear surface of the support metal 31 so as to communicate with the recess 31B.

  The slide member 40 includes a main body portion 40A in which a screw hole 40a into which an adjustment screw 32 described later is screwed, an extension portion 40B formed so as to extend in the horizontal direction from the lower end of the main body portion 40A, It has a shaft portion 40C formed so as to protrude downward from the extending portion 40B. When the slide member 40 is attached to the support fitting 31 by an adjustment screw 32 described later, the main body portion 40A of the slide member 40 is accommodated in the recess 31B of the support fitting 31, and the extended portion 40B of the slide member 40 is the extension of the support fitting 31. The recess 31B is closed by contacting the bottom surface 31b. The slide member 40 corresponds to the moving member of the present invention.

  The adjustment screw 32 has a screw part 32A, a notch part 32B, a first operation part 32C, and a second operation part 32D. The screw portion 32A is screwed into the screw hole 40a of the slide member 40 housed in the recess 31B of the support metal 31. The notch 32B and the first operation part 32C are disposed in the hole 31C on the right side 31d side of the support fitting 31, and the pin 33 (see FIG. 4) press-fitted into the hole 31D is positioned in the notch 32B. Thus, the movement of the adjustment screw 32 in the left-right direction (direction parallel to the door surface 104a) is restricted. The second operation portion 32D is disposed in the hole 31C on the left side 31c side of the support fitting 31. The first operating portion 32C and the second operating portion 32D are exposed on the right side surface 31d and the left side surface 31c of the support fitting 31, respectively, and can be operated with a tool. When the first operation unit 32C or the second operation unit 32D is operated by a tool, the adjustment screw 32 rotates and the slide member 40 slides in the left-right direction as shown in FIG. By operating the adjustment screw 32, the position of the slide member 40 with respect to the bracket 30 can be adjusted within a predetermined range in the left-right direction. The adjusting screw 32 corresponds to the position adjusting means of the present invention.

  4 is a set screw, and this set screw 34 is screwed into a screw hole 31E formed in the rear surface of the support fitting 31. When the set screw 34 is tightened and its tip is brought into contact with the slide member 40, the slide member 40 can be firmly fixed to the support fitting 31. By providing the set screw 41, it is possible to reliably prevent the slide member 40 from moving for some reason after adjusting the position of the slide member 40.

  A bearing 50 is disposed in the hole 22 c of the connecting arm 22. The shaft portion 40C of the slide member 40 is inserted into the bearing 50, and the other end 22b of the connecting arm 22 is connected to the slide member 40 by screwing the fixing screw 52 into the shaft portion 40Cc of the slide member 40 via the washer 51. doing. The connecting arm 22 is supported by the shaft portion 40C of the slide member 40 and is rotatable around the shaft portion 40C. The shaft portion 40C corresponds to the shaft of the present invention.

  The door closer 1 configured as described above is adjusted when the mounting position of the bracket 30 on the upper frame 102 is shifted to the left and the connecting arm 22 is lifted forward (see FIG. 7). By operating the screw 32 and sliding the slide member 40 in the right direction, the connection arm 22 connected to the shaft portion 40C of the slide member 40 is moved, and the connection arm 22 is connected to the door surface 104a or the front surface 2b of the housing 2. It can be adjusted to a parallel state (see FIG. 1). Further, when the mounting position of the bracket 30 on the upper frame 102 is shifted to the right and the connecting arm 22 is tilted rearward (see FIG. 8), the slide member is operated by operating the adjustment screw 32. By sliding 40 to the left, the connecting arm 22 connected to the shaft portion 40C of the slide member 40 is moved, and the connecting arm 22 is parallel to the door surface 104a and the front surface 2b of the housing 2 (see FIG. 1). ) Can be adjusted.

  In the door closer 1 according to the embodiment of the present invention, since both the main arm 21 and the connecting arm 22 constituting the link mechanism 20 are seamless, the design of the link mechanism 20 is good. Even if the mounting position of the door closer 1 is shifted in the left-right direction, the positional relationship of the link mechanism 20 with respect to the door surface 104a and the housing 2 is inherently adjusted by adjusting the position of the slide member 40 with respect to the bracket 30 in the left-right direction. Can be adjusted.

  The door closer according to the present invention is not limited to the above-described embodiment, and various modifications and improvements can be made within the scope described in the claims. For example, in the embodiment described above, the bracket 30 and the support fitting 31 are separate parts, but may be integrally formed.

  In the above-described embodiment, the slide member 40 is configured to move in the left-right direction (direction parallel to the door surface 104a). However, the slide member moves in the front-rear direction (direction orthogonal to the door surface). The position of the slide member with respect to the bracket may be adjusted in the front-rear direction.

  In the above-described embodiment, the adjustment screw 32 is provided with two operation units (the first operation unit 32C and the second operation unit 32D). However, only one operation unit may be provided.

1 Door closer 2 Housing (door closer body)
20 Link mechanism 21 Main arm 22 Connecting arm 30 Bracket 32 Adjustment screw (position adjustment means)
40 Slide member (moving member)
40C Shaft (shaft)

Claims (2)

In a door closer having a door closer body, a bracket, and a link mechanism in which one end is connected to the rotation shaft of the door closer body and the other end is connected to the bracket.
The bracket includes a support fitting having a recess formed on the bottom surface,
A slide member capable of adjusting the position relative to the bracket is provided,
The slide member includes a main body portion, and the extending portion abuts on the bottom surface of the support fitting closing the recess of the support bracket, and a shaft portion to which the other end of the link mechanism is connected,
An adjustment screw for adjusting the position of the slide member is screwed into the main body of the slide member in the recess of the support fitting, and the slide member slides by operation of the adjustment screw. Door closer.   The door closer according to claim 1, wherein the support fitting is formed integrally with the bracket.

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