JP3213588B2 - Door closer - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closer mounted on a fitting mounting frame, and more particularly to a door closer mountable on various types of fitting mounting frames.

[0002]

2. Description of the Related Art Conventionally, this type of door closer is shown in FIG.
As shown, a door closer main body 71 and an arm 72 having one end rotatably connected to the door closer main body 71.
A connecting rod 73 rotatably connected to the other end of the arm 72; and a single bracket 74 rotatably connected to a shaft 73a on the other end of the connecting rod 73. The bracket 74 is provided with a plurality of fitting holes 75a and 75b corresponding to a plurality of fitting mounting holes 63a and 63b formed in the fitting mounting frame 61. The door closer body 71 is attached to the door, and the bracket 74 is attached to the mounting hole 7.
The fitting mounting hole 63 of the fitting mounting frame 61 through the 5a and 75b.
a, 63b are fixed by screws or the like to adjust the closing speed of the door.

[0003]

However, as shown in FIG. 16, the arrangement of the plurality of fitting mounting holes 63a and 63b of the fitting mounting frame 61 varies depending on the type of the fitting mounting frame 61. If the mounting holes 75a, 75b of the bracket 74 correspond to, for example, the fitting mounting holes 63a, 63b of the type shown in FIG. 16A, the door closer may be of the type shown in FIG. 16B or the type shown in FIG. And other types of fitting fitting holes 63a and 63b cannot be used at all. That is, in the conventional door closer, the bracket 74 is the only one type of fitting fitting holes 63a and 63.
Since it corresponds only to the arrangement of b, it can be mounted on one type of fitting mounting frame 61, but cannot be mounted on another type of fitting mounting frame 61. Was poor. Therefore, the door closer manufacturer had to manufacture and store many types of door closers according to the individual fitting mounting frames 61.

On the other hand, when it is necessary to replace the door closer due to a failure or the like, if the same type can be prepared, the door closer can be installed without any problem. However, if only the door closer of a different model or manufacturer can be prepared. It is necessary to drill new fitting fitting holes 63a and 63b newly in the fitting fitting frame 61 that does not support
It was extremely troublesome for installation work. In addition, when newly forming the fitting fitting holes 63a and 63b, the new fitting fitting holes 63a and 63b and the existing fitting fitting holes 63a and 63b are formed.
a and 63b often approach, resulting in a problem that the mounting strength of the bracket 74 is insufficient.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and a single type of bracket can accommodate various types of fitting mounting holes so that it can be mounted on a plurality of types of fitting mounting frames. It is an object to provide a highly versatile door closer that can be used.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and a door closer according to the present invention has a pair of rotary pieces 5 having mounting holes 8A and 8B formed therein. , 6 are pivotally supported, and each of the turning pieces 5, 6 has a free piece 7 having auxiliary mounting holes 9A, 9B whose directions and distances can be freely set with respect to the mounting holes 8A, 8B. Is provided.

[0007] In the door closer according to the present invention,
Since the pair of turning pieces 5 and 6 are pivotally supported, the distance between the pair of mounting holes 8A and 8B can be freely changed by turning the pair of turning pieces 5 and 6, and the turning can be performed. Since the pieces 5 and 6 are provided with free pieces 7 having auxiliary mounting holes 9A and 9B whose directions and distances can be freely set with respect to the mounting holes 8A and 8B, the mounting holes 8A and 8B can be freely changed. The positions of the auxiliary mounting holes 9A and 9B of the free piece 7 can be freely changed with reference to 8B. That is, first, the pair of rotating pieces 5 and 6 are individually rotated to change the distance between the pair of mounting holes 8A and 8B, and the mounting holes 8A and 8B are formed in the fitting mounting holes 63a outside the fitting mounting frame 61. Fix it in place and then
By freely changing the direction and distance of the free piece 7, the auxiliary mounting hole 9
A and 9B are set at the positions of the fitting mounting holes 63b inside the fitting mounting frame 61, and the free piece 7 is fixed. Similarly, even in the arrangement of the other fitting fitting holes 63a and 63b, the direction and the distance of the free piece 7 are freely set by turning the pair of turning pieces 5 and 6, thereby similarly setting the turning piece. 5, 6 and the free piece 7 can be attached. Thus, the mounting holes 8A, 8
Since the positions of B and the auxiliary mounting holes 9A and 9B can be freely set, it is possible to mount the door mounting frame 61 with various types of fitting mounting holes 63a and 63b with one type of door closer. It becomes.

Further, the fitting piece mounting frame 61 having three fitting fitting holes 63a and 63b is formed by forming the free piece 7 so that the pair of auxiliary fitting holes 9A and 9B can be overlapped. When mounting to the fitting, the pair of auxiliary mounting holes 9A and 9B having different heights can be overlapped and mounted, and mounted on the fitting mounting frame 61 in a state where the mounting strength of the pair of free pieces 7 and 7 is sufficiently secured. Can be.

In particular, according to the third aspect, the rotating pieces 5, 6
Are provided with long holes 14 and 24,
One end of the free piece 7 is rotatably supported on each of the first and second free pieces 4 and 24, so that the free piece 7 is rotated so that the auxiliary mounting holes 9A,
The direction of the auxiliary mounting holes 9A and 9B with respect to the mounting holes 8A and 8B can be changed at the same time by changing the direction of the auxiliary holes 9A and 8B. It becomes possible to correspond to the fitting mounting holes 63a and 63b. According to the fourth aspect of the present invention, at least the auxiliary mounting holes 9A and 9B of the mounting holes 8A and 8B and the auxiliary mounting holes 9A and 9B are formed in a substantially elongated hole shape, so that the mounting holes are mounted on the fitting mounting frame 61. Fine adjustment of the position of the screws and the like is possible, so that the degree of freedom in the arrangement of the mounting holes 8A, 8B and the auxiliary mounting holes 9A, 9B is further increased, and it is possible to cope with various kinds of fitting mounting holes 63a, 63b. Can be attached.

[0010] According to a fifth aspect of the present invention, an adjusting tool 40 for adjusting and fixing the rotational positions of the pair of rotating pieces 5 and 6.
In addition to being able to finely adjust the rotational positions of the pair of rotating pieces 5 and 6 and attaching the same, the individual rotating of the pair of rotating pieces 5 and 6 is stopped and fixed after the fine adjustment. Therefore, the rotating pieces 5 and 6 can be stably mounted without vibrating.

Further, according to a sixth aspect of the present invention, the rotating pieces 5, 6
Contact surfaces 17 and 2 that contact the fitting mounting frame 61 of the free piece 7
By applying a non-slip processing to 7, 37, the contact surface 1
The rotating pieces 5, 6 and the free piece 7 can be mounted in a state where the frictional resistance between the fittings 7, 27, 37 and the fitting mounting frame 61 is large, so that a stable mounting state is ensured even when the door is repeatedly opened and closed. You can.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, 1 is a door closer main body fixed to a door, 2 is an arm having one end rotatably connected to the door closer main body 1, and 3 is rotatable to the other end of the arm 3. A pair of turning pieces 5 and 6 are pivotally supported on a shaft 3a at the other end of the connecting rod 3.

The pair of turning pieces 5 and 6 are formed substantially symmetrically in a plan view, and one of the turning pieces 5 is, as shown in FIG. It is formed in a shape. That is, the rotating pieces 5 are sequentially arranged from the support shaft 12 side.
Is mounted, and the second flat portion 5b, which is one step higher than the first flat portion 5a, through the first step portion 15 having a substantially fan shape.
And a third flat portion 5c which is one step higher than the second flat portion 5b through a second step portion 16 which is substantially straighter than the second flat portion 5b, and the third flat portion 5c is in contact with the fitting mounting frame 61. Interfacing 1
7 is formed.

In this embodiment, the first flat portion 5a
A step D1 between the second flat part 5b and the second flat part 5b is set to 5 mm, a step D2 between the second flat part 5b and the third flat part 5c is set to 3.2 mm, and the first flat part 5a and the second flat part 5b are set. 5b and the third plane portion 5c are formed to have a uniform thickness, and the thickness W1 is 3.
It is set to 2 mm.

Further, reference numeral 13 denotes a substantially arc-shaped adjustment hole centered on the support shaft 12, reference numeral 14 denotes a substantially arc-shaped long hole centered on the support shaft 12, and reference numeral 8A denotes a fixing hole to the fitting mounting frame 61. The adjusting long hole 13, the long hole 14, and the mounting hole 8A are formed in the first flat portion 5a, the second flat portion 5b, and the third flat portion 5c, respectively.

Next, as shown in FIG. 3, the other rotating piece 6 is formed in a substantially stepped shape in cross section, and includes a first flat portion 6a and a first step portion substantially fan-shaped from the first flat portion 6a. The second flat portion 6b is formed from a second flat portion 6b one step higher than the second flat portion 25 and a third flat portion 6c one step higher than the second flat portion 6b through a second step portion 26 which is substantially linear from the second flat portion 6b. The fitting mounting frame 6 is provided in the portion 6c.
1 and a contact surface 27 is formed.

In this embodiment, the first flat portion 6a
A step D3 between the second flat portion 6b and the second flat portion 6b is set to 8.2 mm. That is, the step D3 is the step D1 (5
mm) is set to be larger by the thickness W1 (3.2 mm) of the rotating piece 5. The step D4 between the second plane part 6b and the third plane part 6c is set to 3.2 mm, that is, to match the step D2 (3.2 mm) of the rotating piece 5.

Further, reference numeral 21 denotes an insertion hole into which the support shaft 12 of the rotating piece 5 is inserted, 23 denotes a substantially arc-shaped adjustment elongated hole centered on the support shaft 12, and 24 denotes a centered hole around the support shaft 12. 8B is a mounting hole for fixing to the fitting mounting frame 61, and the insertion hole 21 and the adjustment long hole 23 are the first flat portion 6a.
In addition, the long hole 24 and the mounting hole 8B are formed in the second flat portion 6b and the third flat portion 6c, respectively.

As shown in FIG. 4, the pair of left and right rotating pieces 5 and 6 formed as described above have the support shaft 12 of one rotating piece 5 inserted into the insertion hole 21 of the other rotating piece 6. Insert from above,
Further, by inserting the support shaft 12 into the shaft portion 3 a of the connecting rod 3, the supporting shaft 12 is supported by the connecting rod 3. That is, the rotating piece 5 formed by integrally forming the support shaft 12 is the shaft portion 3 a of the connecting rod 3.
And the other rotating piece 6 can rotate with respect to the support shaft 12, so that the pair of left and right rotating pieces 5 and 6 can be individually rotated with respect to the connecting rod 3. Moveable. After assembling the pair of rotating pieces 5 and 6, the adjusting screw 40 as an adjusting tool is inserted into the adjusting slots 13 and 23 which vertically overlap.
And the fixing nut 42 are inserted from above and below. Adjustment screw 4
The individual rotation of the pair of rotating pieces 5 and 6 can be finely adjusted by the 0 and the fixing nut 42, and the individual rotation of the pair of rotating pieces 5 and 6 can be stopped by tightening the adjustment screw 40. Can be fixed. In addition, the fixing nut 42
Is formed in a substantially T-shape in cross section having a flange portion.

Next, the pair of turning pieces 5 and 6 assembled as described above have auxiliary mounting holes 9A and 9B for mounting to the fitting mounting frame 61 at one end, and a screw at the other end. A pair of free pieces 7, 7 having holes 36, 36 formed therein are attached. In order to attach the pair of free pieces 7, 7 to the rotating pieces 5, 6, the pair of free pieces 7, 7 are placed on the contact surfaces 17, 27 of the rotating pieces 5, 6, and the fixing screws 41 are provided. , 41 penetrate through the elongated holes 14, 24 of the rotary pieces 5, 6 from below, and are screwed into the screw holes 36. By the fixing screw 41, the free piece 7 is rotatably supported by the slots 14 and 24, and the slot 1 is rotatably supported.
4 and 24, and can be fixed to the rotating pieces 5 and 6 by stopping the rotation and movement of the free piece 7 by strongly tightening the fixing screw 41.

When one end of the free piece 7, 7 is rotatably supported by the long holes 14, 24 of the pair of rotating pieces 5, 6, the pair of free pieces 7, 7 abuts. The surfaces 37, 37 and the contact surfaces 17, 27 of the pair of rotating pieces 5, 6 are located at the same height. This is because in the present embodiment, the thickness W2 of the free piece 7 is set to 3.2 mm, that is, the same thickness as the steps D2 and D4 (3.2 mm) of the pair of rotating pieces 5 and 6, and The step D3 (8.2 m) of the rotating piece 6 positioned below the step D1 (8.2 m) of the rotating piece 5 positioned above
This is because m) is set to be larger by the thickness W1 (3.2 mm) of the rotating piece 5.

The door closer constructed as described above,
As shown in FIG. 5, the door closer main body 1 is fixed to the door 60, and a pair of rotating pieces 5, 6 and a pair of free pieces 7, 7 are provided.
Is used by being fastened and fixed to the fitting mounting frame 61 with the screws 62, but can be used by attaching to various fitting mounting frames 61 as described below.

For example, for a fitting mounting frame 61 having four fitting mounting holes 8a, 8b, 9a, 9b as shown in FIG. , 6 are rotated in the direction of arrow A in FIG. 6 so that the pair of mounting holes 8A, 8B are aligned with the positions of the outer fitting mounting holes 8a, 8b. Frame 61
To conclude. At this time, the adjustment screw 40 is tightened to stop the rotation of the pair of rotation pieces 5 and 6 and then attached. Next, the pair of free pieces 7, 7 are rotated in the direction of arrow B in FIG. 6 and moved in the direction of arrow C along the long holes 14, 24, and the auxiliary mounting holes 9A, 9B are inserted into the inner fitting mounting holes 9a. , 9b, and the pair of free pieces 7, 7 are fixed with screws 62 to the fitting mounting frame 61.
Attach to After the attachment of the pair of free pieces 7, 7 is completed, the fixing screw 41 is tightened to fix the free piece 7 to the rotating pieces 5, 6.

As described above, the pair of rotating pieces 5 and 6 can be individually rotated, and the pair of free pieces 7 and 7 are attached to the mounting holes 8A and 8A.
Since the direction and the distance can be freely changed with respect to 8B, it can be mounted on the fitting mounting frame 61 shown in FIG. 6, and also different kinds of fitting mounting holes 8a and 8 as shown in FIG.
It can be similarly mounted on the fitting mounting frame 61 having b, 9a, 9b. Fitting mounting frame 61 as shown in FIG.
In the case where the pair of mounting holes 8A and 8B are mounted, first, the pair of turning pieces 5 and 6 are turned in the direction of arrow A in FIG. It is set at the position of the fitting mounting holes 8a and 8b. By rotating the pair of free pieces 7, 7 along the long holes 14, 24 in the direction of arrow C to set the auxiliary mounting holes 9A, 9B at the positions of the fitting mounting holes 9a, 9b, All four fitting fitting holes 8a, 8b, 9a, 9b can be accommodated.

Further, as shown in FIG. 8, for example, a pair of turning pieces 5 and 6 are turned on a fitting mounting frame 61 having fitting mounting holes 8a, 8b and 9a at three places. The mounting holes 8A and 8B are set and fixed at the positions of the holes 8a and 8b, and are mounted to the remaining one fitting mounting hole 9a using one of a pair of left and right free pieces 7 and 7. Can be. That is, as shown in FIG. 8, the one free piece 7 is not used, but is fixed to the rotating piece 6 with the fixing screw 41, and the other free piece 7 is moved in the arrow C direction while being rotated in the arrow B direction. Then, the auxiliary piece 9A is set at the position of the remaining one fitting hole 9a, and the free piece 7 is attached. As described above, the door closer according to the present embodiment can be similarly attached to the fitting mounting frame 61 having the fitting mounting holes 8a, 8b, and 9a at three places as well as at four places.

In the present embodiment, a description has been given of a case in which the pair of free pieces 7, 7 are provided so as to be rotatable and movable with respect to the rotating pieces 5, 6. The door closer is not limited to this. For example, only one free piece 7 is provided rotatably and movably with respect to the rotating piece 5, and the other free piece 7 is fixed to the rotating piece 6. Alternatively, the other free piece 7 may be provided on the rotating piece 6 only rotatably or only movably. However, a pair of free pieces 7, 7 are
By providing the directions and distances to A and 8B so that they can be freely set, there is an advantage that it is possible to mount the mounting frame 61 on even more types of fitting mounting frames 61.

In the above embodiment, the free piece 7 is provided on each of the pair of rotating pieces 5 and 6, but as shown in FIG. 9, only the free piece 6 is free. A piece 7 is provided, and three fitting mounting holes 8a, 8b, 9b are provided.
It is also possible to align the mounting holes 8A, 8B and the auxiliary mounting holes 9B with each other and mount them on the fitting mounting frame 61 for use.

When three fitting fitting holes 8a are used by being attached to a fitting fitting frame 61 having three holes, as shown in FIG. 10, a pair of auxiliary fitting holes 9A and 9B can be overlapped. For this purpose, a pair of free pieces 7, 7 are provided with step portions 35, 35.
It is preferable to form a pair of auxiliary mounting holes 9A and 9B having different heights so that the pair of free pieces 7 and 7 can be simultaneously attached to the fitting mounting frame 61. There is an advantage that the fittings 7 and 7 can be attached to the fitting attachment frame 61 with sufficient securing strength.

As shown in FIG. 11, the mounting holes 8A, 8B
By forming the auxiliary mounting holes 9A and 9B in a substantially elongated shape, fine adjustment of the screw 62 becomes possible, and the fitting mounting hole 8a is formed.
Can be further increased. One of the mounting holes 8A, 8B and the auxiliary mounting holes 9A, 9B is formed in a substantially elongated hole shape, so that the fitting mounting hole 8a is formed.
Can be increased, but in particular, by forming the auxiliary mounting holes 9A and 9B of the pair of free pieces 7 and 7 in a substantially elongated shape, the fitting mounting holes 8a and 8a of the fitting mounting frame 61 are formed.
8b, 9a, 9b, inside fitting fitting holes 9a, 9b
This is preferable because the ability to adapt to the position can be further improved.

Further, the contact surfaces 17, 6 of the pair of rotating pieces 5, 6
As shown in FIG. 12, it is preferable that the contact surfaces 37, 37 of the pair 27 and the pair of free pieces 7, 7 are subjected to, for example, knurling or the like, so that the contact surfaces 17, 2,
7 and 37 can be mounted in contact with the fitting mounting frame 61 in a state where the frictional resistance is large, and there is an advantage that the mounting strength of the rotating pieces 5 and 6 and the free piece 7 can be secured and stabilized. . In particular, as described above, the mounting holes 8A,
8B and the auxiliary mounting holes 9A and 9B are preferably formed in a substantially elongated hole shape because sufficient mounting strength can be ensured. In addition, as the non-slip processing, for example, the contact surfaces 17, 27, 37
It is also possible to attach an elastic body such as rubber to the surface.

In the above embodiment, the rotating pieces 5,
Although a description has been given of a case where the six long holes 14 and 24 are formed in a substantially arc shape, the door closer of the present invention is not limited to this, and the long holes 14 and 24 are formed in a straight line or a substantially elliptical shape. The design can be changed as appropriate.

Further, in the above embodiment, the pair of left and right rotating pieces 5 and 6 are each provided with two step portions, that is, the first step portion 1.
Although the description has been given of the case where the door closer is formed in a substantially stair-like shape in cross section having the second step portions 5 and 25 and the second step portions 16 and 26, the door closer of the present invention is not limited to this. The piece 5 may include only the second step 16 on the distal end side, and the other rotating piece 6 may include the first step 25 and the second step 26. In this case, by changing the step D3 of the first step portion 25 of the other rotating piece 6 to 3.2 mm, the two contact surfaces 17, 2 of the rotating pieces 5, 6 are changed.
7 can be the same height. That is, the design and the number of steps can be variously changed.
In a state in which the rotating pieces 7 are attached to the rotating pieces 5 and 6, the heights of the contact surface 37 of the free piece 7 and the contact faces 17 and 27 of the rotating pieces 5 and 6 can be set to the same height. The thickness W1, W2 of the free piece 7 and the rotating pieces 5, 6 and the shapes of the rotating pieces 5, 6 may be provided.

In the above embodiment, the adjusting screw 40 and the fixing nut 42 are used as adjusting tools for adjusting the individual rotation of the pair of left and right rotating pieces 5 and 6. However, the present invention is not limited to this.
It is also possible to adjust and fix the individual rotation without using the fixing nut 42 by screwing the adjustment screw 40 into the screw hole of the turning piece 5 using the adjusting long hole 13 as a screw hole.

Further, in the above embodiment, the adjusting tool is located on the mounting holes 8A, 8B side with respect to the shaft 3a of the connecting rod 3, but the position of the adjusting tool is not limited to this. 1
3, it is also possible to position an adjusting tool using the adjusting screw 40 on the side opposite to the mounting holes 8A and 8B with respect to the shaft portion 3a.

Generally, as shown in FIG. 14, when the door 60 is turned in the opening direction (the direction of the arrow T in the figure), the connecting rod 3 also turns in the same direction with this rotation (the direction of the arrow U). ), By positioning the adjusting tool on the opposite side to the mounting holes 8A and 8B, the position of the adjusting tool can be out of the rotation range of the connecting rod 3. Therefore, interference between the connecting rod 3 and the head of the adjustment screw 40 can be prevented, and as a result, the length of the support shaft 12 can be shortened, and the overall thickness of the door closer can be reduced.

Moreover, since the adjusting tool and the door closer main body 1 do not overlap in a planar manner in the mounted state, the work can be easily performed when the adjusting screw 40 is screwed and fixed from below. There are advantages too.

As described above, the position of the adjusting tool is preferably out of the range of rotation of the connecting rod 3, and particularly, the adjusting tool is attached to the shaft 3a of the connecting rod 3 so as not to overlap the door closer body 1 in a plane. The side opposite to the holes 8A, 8B is preferred.

Further, the door closer of the present invention cannot be installed only in the fitting fitting holes 8a... Arranged as described above.
Can be attached to the fitting mounting frame 61 having

In the above description, the case where the turning pieces 5, 6 and the free piece 7 are attached to the lower surface of the fitting attaching frame 61 has been described. You may comprise so that it may attach to a side surface.

[0040]

As described above, in the door closer according to the present invention, a pair of rotating pieces are pivotally supported, and the direction and distance of the rotating pieces can be freely set with respect to the mounting hole. Since the free piece having the possible auxiliary mounting hole is provided, the distance between the mounting holes of the pair of rotating pieces can be freely changed, and the auxiliary mounting hole of the free piece can be freely set based on the mounting hole. As a result, it is not necessary to prepare various types of door closers according to the individual fitting mounting frames as in the related art, and one type of door closer can be used. It can be attached to various fitting mounting frames, and has the effect of being extremely versatile. Further, there is no need to newly form a fitting mounting hole in the fitting mounting frame at the time of mounting, and there is an effect that the mounting operation can be performed extremely efficiently.

Further, since the free piece is formed such that the pair of auxiliary mounting holes can be overlapped, the pair of auxiliary mounting holes can be overlapped and mounted on the fitting mounting frame, so that the mounting strength of the free piece is further improved. And the durability of the free piece can be further improved.

In particular, by freely rotatably supporting the free piece in the long hole of the rotating piece, the direction and distance of the auxiliary mounting hole can be changed more freely, and the type of the fitting mounting frame that can be mounted. Can be further increased, and versatility can be further improved. Also, by forming at least the auxiliary mounting hole of the mounting hole and the auxiliary mounting hole into a substantially elongated hole shape,
Furthermore, the number of types of fitting fixture attachment frames that can be attached is increased, and versatility can be further enhanced.

Further, by providing an adjusting tool for adjusting and fixing the turning positions of the pair of turning pieces, the turning positions of the pair of turning pieces can be finely adjusted. Can be stopped and fixed, so that there is an effect that vibration of the rotating piece when opening and closing the door can be suppressed.

Further, by applying anti-slip processing to the contact surface between the rotating piece and the free piece, the frictional resistance of the rotating piece and the free piece against the fitting mounting frame can be increased, and the mounting state can be further stabilized. This has the effect of improving the durability against repeated opening and closing of the door.

[Brief description of the drawings]

FIG. 1 shows a door closer according to an embodiment of the present invention, in which (a) is a plan view and (b) is a front view.

FIG. 2 shows a main part of a door closer according to one embodiment;
(A) is a plan view, and (B) is a cross-sectional view taken along the cutting line QQ in the direction of the arrow.

FIG. 3 shows a main part of the door closer of one embodiment,
(A) is a plan view, and (B) is a cross-sectional view taken along a cutting line RR in an arrow direction.

FIG. 4 shows a main part of a door closer according to one embodiment;
(A) is a side view including a partial cross section, and (B) is a bottom view.

FIG. 5 is a side view including a partial cross section showing a use state of the door closer of one embodiment.

FIG. 6 is a bottom view showing a use state of the door closer of one embodiment.

FIG. 7 is a bottom view showing the use state of the door closer of one embodiment.

FIG. 8 is a bottom view showing the use state of the door closer of one embodiment.

FIG. 9 is a bottom view showing a use state of a door closer according to another embodiment.

FIG. 10 shows a main part of a door closer according to another embodiment,
(A) is a bottom view and (B) is a front part.

FIG. 11 is a bottom view showing a main part of a door closer according to another embodiment.

FIG. 12 is a bottom view showing a main part of a door closer according to another embodiment.

FIG. 13 shows a main part of a door closer according to another embodiment,
2A is a plan view, and FIG. 2B is a cross-sectional view taken along line SS of FIG.

FIG. 14 is a plan view showing a use state of a door closer according to another embodiment.

15A and 15B show a conventional door closer, wherein FIG. 15A is a plan view and FIG. 15B is a bottom view of a main part showing a use state.

FIG. 16 is a bottom view showing a main part of the fitting mounting frame.

[Explanation of symbols]

1. Door closer body, 2. Arm, 3. Connection rod,
5, 6: rotating piece, 7: free piece, 8A, 8B: mounting hole, 9
A, 9B: auxiliary mounting holes, 14, 24: long holes, 17, 2
7, 37 contact surface, 40 adjustment screw (adjustment tool), 42
Fixing nut

Claims (6)

(57) [Claims] 1. A pair of turning pieces (5, 6) each having a mounting hole (8A, 8B) formed therein are pivotally supported, and said turning pieces (5, 6) are provided with Auxiliary mounting holes (9A, 8B) whose direction and distance can be freely set with respect to mounting holes (8A, 8B).
A door closer characterized by being provided with a free piece (7) having 9B). 2. A pair of turning pieces (5, 6) formed with mounting holes (8A, 8B) are pivotally supported, and said turning pieces (5, 6) are provided with said turning pieces (5, 6). Auxiliary mounting holes (9A, 8B) whose direction and distance can be freely set with respect to mounting holes (8A, 8B).
A door closer having a free piece (7) having a pair of auxiliary mounting holes (9A, 9B). 3. The slot (5, 6) has a slot (14,
24) are drilled, and the slots (14, 24)
The door closer according to claim 1 or 2, wherein one end of the free piece (7) is rotatably supported by a shaft. 4. At least one of the mounting holes (8A, 8B) and the auxiliary mounting holes (9A, 9B).
The door closer according to any one of claims 1 to 3, wherein 9B) is formed in a substantially elongated hole shape. 5. The door closer according to claim 1, further comprising an adjusting tool (40) for adjusting and fixing a rotating position of the pair of rotating pieces (5, 6). . 6. The rotating piece (5, 6) and the free piece (7).
Is the contact surface (17, 27, 37) that contacts the fitting mounting frame
The door closer according to any one of claims 1 to 5, wherein the door closer is processed to prevent slippage.