JP2001323720A - Door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To simplify a door closer. SOLUTION: The door closer has the first link (4), in which one end is connected rotatably to an entrance frame (1), the second link (6), in which one end is connected at the other end of the first link (4) through a hinge (5) and the other end is connected rotatably to the door (2) of the entrance frame (1), and a door-closing speed control means (7) controlling the closing speed of the door (2), and the door-closing speed control means (7) is housed in the first link (4) or the second link (6).

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closer incorporating door closing speed control means for performing a closing function in a link provided between an entrance frame and a door.

[0002]

2. Description of the Related Art A conventional general door closer includes a first link having one end rotatably connected to an entrance frame, and one end connected to the other end of the first link via a hinge. The vehicle includes a second link rotatably connected to the other end of the door, and a closer body fixed to a door surface located between the door and the second link.

[0003] The closer main body incorporates a door closing speed control means. The closing speed control means includes a spring for accumulating a closing force and a hydraulic circuit device for controlling the closing speed. The fluid pressure circuit device is provided on the oil-filled cylinder, a piston reciprocating in the cylinder in conjunction with opening and closing of the door, and a piston provided to pass fluid from one chamber in the cylinder to another chamber when the door is opened. It has a check valve and a speed regulating valve provided in the cylinder to allow fluid to flow from another chamber in the cylinder to one chamber when the door is closed. The device for interlocking the piston with the opening and closing of the door is composed of a pinion whose shaft is fixed to the doorway frame side or the door side in a detented state, and a rack which meshes with this pinion and is fixed to the piston. The spring accumulates by the movement of the piston when the door is opened, and biases the piston when the door is closed.

[0004] The door closer also has a stop means for stopping the door at a desired position. The stop means is generally adapted to act on the rotating part of the first link.

The door closer disclosed in Japanese Patent Laid-Open No. Hei 4-27090 is different from a general door closer.
A closer main body is provided at a connection point between the first link and the second link other than the door surface. The above-mentioned spring and the fluid pressure circuit device are incorporated in this connection point.

[0006]

As described above, a conventional general door closer is provided with a closer body separately from the link, and the closer body is fixed to the door surface. Damage, installation work is also troublesome,
Requires a lot of installation space.

Further, as described above, the conventional stop means is incorporated in the rotating portion of the first link, and acts in a manner to suppress the rotation of the first link. The response of entering / releasing the stop operation is poor because the operation is slower than the opening / closing operation.

In the door closer disclosed in Japanese Patent Application Laid-Open No. Hei 4-27090, the closer body is arranged at a connecting point between the first link and the second link, so that the connecting point becomes extremely large. This causes design problems.

An object of the present invention is to solve the above problems.

[0010]

According to a first aspect of the present invention, there is provided a first link (4) having one end rotatably connected to an entrance frame (1); A second link (6) having one end connected to the other end of the one link (4) via a hinge (5) and the other end rotatably connected to the door (2) of the entrance frame (1); And a closing speed control means (7) for controlling a closing speed of the door (2), wherein the closing speed control means (7) includes the first link (4) or the second link (7). 6) Adopt a door closer housed inside.

In the invention according to claim 2, the second link (6) is connected to the door (2) via a bracket (11), and the bracket (11) is connected to the second link (6). 6. A door closer according to claim 1, wherein a stop means (25) for stopping the door (2) at a desired position is provided between the door closer (6).

According to a third aspect of the present invention, the first link (4) and the rotation surface of the second link (6) are substantially on the same plane. Adopt a door closer.

[0013]

Next, embodiments of the present invention will be described with reference to the drawings. First Embodiment As shown in FIGS. 1 to 3, a door 2 is applied to an entrance frame 1 of a building or the like, and the door 2 is connected to a vertical frame of the entrance frame 1 via a hinge pin 3, and This door closer is provided between the upper frame 2 and the upper frame of the entrance frame 1.

The door closer has a first link 4 rotatably connected to the entrance frame 1, one end connected to the other end of the first link 4 via a hinge 5, and the other end connected to the door 2. A second link 6 rotatably connected thereto, and a closing speed control means 7 for controlling a closing speed of the door 2.

The first link 4 is a round bar-shaped link,
One end thereof is connected to a support 9 via a vertical pin 8. The support 9 is fixed to the upper frame of the entrance frame 1 with a fixing screw or the like. The first link 4 can be swiveled about a support 9 around a vertical pin 8 in a substantially horizontal plane.

The second link 6 is a substantially cylindrical body,
7, one end is connected to the other end of the first link 4 via a vertical pin 5a of a hinge 5, and the other end is connected to a bracket 1 via a vertical pinion shaft 10a which will be described later.
Connected to 1. The bracket 11 is fixed to the upper frame of the door 2 by a fixing screw or the like. For this reason, the second link 6 can be swiveled together with the first link 4 on a substantially horizontal plane with the vertical pin 5a of the hinge 5 and the pinion shaft 10a as fulcrums with the opening / closing operation of the door 2.

The closing speed control means 7 has a spring 12 for accumulating a closing force and a hydraulic circuit device for controlling the closing speed, which will be described later, and is entirely housed in the second link 6. As a result, the second link 6 is slightly thicker than the conventional second link. However, since the closer body fixed to the conventional door surface is omitted, the number of parts of the door closer is reduced, and the appearance of the door closer is improved. The appearance of the door 2 is also improved.

As shown in FIGS. 5, 7, 10 and 11, the fluid pressure circuit device reciprocates in a cylinder 6a filled with oil as a fluid and interlocks with the opening and closing of the door 2 in the cylinder 6a. A check valve 15 formed in the piston 13 to allow oil to pass from one chamber 14a in the cylinder 6a to the other chamber 14b when the door is opened, and a one-chamber from the other chamber 14b in the cylinder 6a when the door is closed. And a speed adjusting valve 16 formed in the cylinder 6a so as to pass through the cylinder 14a.

The cylinder 6a is formed by the second link 6 itself, and its cavity extends in the length direction of the second link 6. The inside of the cylinder 6a is filled with oil and the piston 13
Is divided into two chambers 14a and 14b.

The device for interlocking the opening and closing of the piston 13 with the opening and closing of the door 2 is fixed to a pinion shaft 10a fixed to the bracket 11 fixed to the door 2 in a detented state, and a piston 13 meshing with the teeth of the pinion 10. And a rack 17. The rack 17 is formed on a piston rod 19 connected to the piston 13 via a pin 18. 5 and FIG. 7, since the pinion 10 and the rack 17 rotate relatively bidirectionally as the door 2 is opened and closed.
Reciprocates between the closed position shown in FIG. 10 and the opened position shown in FIGS. The piston 13 has a check valve 15 at the center thereof. When the piston 13 moves from the closed position to the opened position, the oil in one chamber 14a is transferred to the other chamber 14b by the action of the check valve 15. However, during the reverse movement, the flow of oil is blocked by the action of the ball 15a of the check valve 15.

The spring 12 for storing the door closing force is a compression coil spring, and is housed in the one chamber 14a of the cylinder 6a so as to surround the piston rod 19. Spring 12
When the piston 13 moves from the closed position to the open position, the piston 13 contracts and accumulates energy, and attempts to urge the piston 13 in the opposite direction by the accumulated force. This energy is door 2
Is the driving force for automatically closing the.

As shown in FIG. 11, the speed control valve 16
It is provided in each of two oil flow paths connecting between the two chambers 14a and 14b of the cylinder 6a. When the piston 13 moves from the open position to the closed position, the fluid is blocked by the check valve 15 so that the fluid tends to pass through the speed control valve 16. The speed of 13 is reduced and the door 2 tries to close slowly. The speed at which the door 2 closes can be adjusted by adjusting the oil flow rate with the speed adjusting valve 16. Adjusting unit 1 of speed adjusting valve 16
6a is the second link 6 as shown in FIG. 8 and FIG.
, The door closing speed can be easily adjusted.

As shown in FIG. 7, the pinion shaft 10a is supported by the bracket 11 at both upper and lower ends. In a conventional general door closer, the link 6 is a pinion shaft 10a.
However, the load on the pinion shaft 10a and the bearing member is large because it is connected to only one end of the door, but the structure in which both ends of the pinion shaft 10a are supported by the brackets 11 improves the strength and durability of the door closer. I do. As shown in FIGS. 14 to 16, the bracket 11 has upper and lower support arms 11a and 11b.
Is provided with a square hole 20. At both upper and lower ends of the pinion shaft 10a, square shaft portions to be fitted into the square holes 20 are formed. As shown in FIG. 6 and FIG. 7, the pinion shaft 10 a is
And is fixed to the bracket 11 by screwing bolts 21 on both ends. In addition, a portion where the pinion shaft 10a is in contact with the cylinder 6a is provided with an O for preventing oil leakage and smoothing the rotation of the second link 6.
A ring 22, a bearing 23, a bush 24 and the like are provided.

As shown in FIGS. 7, 12 and 13, this door closer is provided with stop means 25 for stopping the door 2 at a desired position between the bracket 11 and the second link 6.

The stop means 25 is, for example, a click stop mechanism, and includes a convex portion 26 provided at the end of the second link 6 and a concave portion 27 provided on the bracket 11. The convex portion 26 and the concave portion 27 may be exchanged between the second link 6 and the bracket 11. Convex part 26
Alternatively, the recess 27 may be provided not only at one place but also at a plurality of places, in which case the door 2 can be stopped and held at a plurality of positions.

The projections 26 are formed of, for example, balls, and are inserted into two vertical holes 28 vertically penetrating the second link 6. A spring 29 is inserted into the vertical hole 28 so as to make the two balls protrude from the upper and lower openings, and near the opening, the ball slightly protrudes out of the opening but prevents the ball from jumping out of the vertical hole 28. A stopper 30 composed of a set screw is fixed. A rivet-shaped receiving member 31 is provided between the ball and the spring 29 to prevent generation of abnormal noise.
Is inserted.

As shown in FIGS. 13 to 16, the concave portion 27 is formed by cam pieces provided on the upper and lower support arms 11a and 11b of the bracket 11, and the second link 6 rotates around the pinion shaft 10a. In this case, the upper and lower objects are provided in pairs on the locus drawn by the convex portion 26. The recess 27 is formed separately from the bracket 11 as shown in FIGS.
a and 11b are fitted and fixed in holes 32 formed in the holes. A plurality of holes 32 are formed in each of the support arms 11 a and 11 b along the above-mentioned trajectory, and the concave portions 27 are fitted into desired holes 32. The recess 27 may be fitted in only the upper and lower holes 32, or may be fitted in all the holes 32 to set a plurality of stop positions.

The concave portion 27 or the convex portion 26 may be formed directly on the bracket 11 by pressing or the like. In that case, the convex portion 26 or the concave portion 27 is provided so as to be able to protrude and retract with a spring or the like.

According to the stop means 25 having the above-described structure, when the door 2 is opened, the second link 6 rotates relative to the bracket 11 as shown in FIG.
(B) As shown in (C), the convex portion 26 is immersed in the vertical hole 28 against the urging force of the spring 29 in the vertical hole 28, thereby climbing over the mountain of the concave portion 27 and fitting into the valley of the concave portion 27. As a result, the second link 6 stops at that position and the door 2
Stops at the opening position. Fig. 1 when door 2 is opened further
As shown in FIG. 3 (D), the convex portion 26 gets over the concave portion 27 on the opposite side, and when the next concave portion 27 exists, it is fitted into the valley of the concave portion 27 and stopped. When the door 2 is closed, FIG.
(B) As shown in (A), the convex portion 26 passes over the concave portion 27 toward the original position.

Next, the operation of the door closer having the above configuration will be described.

In the closed state shown in FIG. 1A, since the spring 12 in the second link 6 urges the piston 13 to the left in the drawing, the rack 17 moves to the one chamber 14b side. I do. Therefore, the second link 6 is the first link 4
And the door 2 keeps the door closed.

When the closed door 2 is opened, the hinge pins 3
1 (B) and 1 (C), the second link 6 is rotated around the pinion shaft 10a in the counterclockwise direction in FIG. Try to. Accordingly, the piston 13 moves in one direction in the cylinder 6a via the rack 17, and the oil in the cylinder 6a flows from the one chamber 14a on the rack 17 side to the other chamber 14b through the check valve 15. Also, the piston 13 is simultaneously
, And the spring 12 stores the closing force.

When the stop means 25 is set so as to stop the door 2 at the respective positions shown in FIGS. 1B and 1C, the concave portion 27 is previously formed in the corresponding hole 32 on the bracket 11.
To be fixed. When the door 2 is opened, the second link 6 rotates with respect to the bracket 11 on the door 2,
The protrusion 26 on the second link 6 side moves on a circle centered on the pinion shaft 10a, and the support arms 11a,
11b. These uneven portions 27 and 26
Of the spring 12 overcomes the restoring force of the spring 12, and maintains the first and second links 4, 6 at the bending angle at that time. Thus, the door 2 stops at the position shown in FIG. 1B or the position shown in FIG.

1B or 1C, the door 2 can be closed by pushing the door 2 in the closing direction to disengage the convex portion 26 from the concave portion 27. 13 and the rack 17 are pushed back in the opposite direction in the cylinder 6a, and the rack 17 attempts to move to the one chamber 14b side. As a result, the second link 6 tries to overlap with the first link 4, and the door 2 rotates in the closing direction with the hinge pin 3 as a fulcrum to close the entrance as shown in FIG. When the door 2 closes, the oil in the counter-spring-side chamber 14b of the cylinder 6a is sent to the speed regulating valve 16 by the closing action of the check valve 15, and the flow rate is regulated by the speed regulating valve 16 while the spring-side chamber 14 is regulated.
Return to a. Thereby, the restoring force of the spring 12 is gradually released, and the door 2 gently self-closes.

The door closer can be coped with by mounting the bracket 11 upside down according to the right and left of the door 2.

<Embodiment 2> As shown in FIGS. 20 to 22, this door closer has a first link whose one end is rotatably connected to the doorway frame 1, similarly to the door closer of Embodiment 1. 4, a second link 6 having one end connected to the other end of the first link 4 via a hinge 5 and the other end rotatably connected to the door 2 of the entrance frame 1, and a closing speed of the door 2. Closing speed control means 7 (see FIG. 23) for controlling the

The piston 13 in the closing speed control means 7
The pinion shaft 1 is fixed to the bracket 11 fixed to the door 2 in a non-rotating state.
0a and racks 17a and 17b fixed to the piston 13 meshing with the teeth of the pinion 10. Unlike the first embodiment, the piston rod 19 (see FIG. 5) is omitted, and the two rows of racks 17a and 17b are provided on the opposing wall of the cavity passing through the piston 13 in the lateral direction.
3 are formed along the length direction. Pinion 1
Numeral 0 denotes a toothless gear which meshes with only one of the racks 17a or 17b. Only one end of the pinion shaft 10a protrudes outside the second link 6. The rotation direction of the pinion shaft 10a is reversed by the right and left of the door 2.
Are provided with the facing racks 17a and 17b as described above, so that the piston 13 is reciprocated by selectively meshing with the pinion 10 in accordance with the right and left of the door 2.

When the door 2 is opened and closed, the pinion 10 and one of the racks 17a or 17b are engaged with each other as shown in FIG. 28, so that the piston 13 is in the closed position shown in FIGS. 23 and 27 and the open position shown in FIG. Reciprocate between positions. The piston 13 has a check valve 15 at its center. Check valve 1
5 is provided in a direction opposite to that of the first embodiment, and therefore, the relationship between the closed position and the opened position of the piston 13 is also opposite to that of the first embodiment. Spring 12 for storing the closing force
Is also stored in a room opposite to that of the first embodiment. The adjusting portion 16a of the speed adjusting valve 16 is exposed below the second link 6, and can be easily operated from below regardless of the right and left of the door 2.

The pinion shaft 10a is shown in FIGS.
As shown in FIG. 6, the upper end protrudes out of the second link 6 and is cantilevered by the bracket 11 at this upper end. As shown in FIGS. 37 to 39, the bracket 11 has one support arm 11a.
0 is drilled. At the upper end of the pinion shaft 10a, a square shaft portion that fits into the square hole 20 is formed. Pinion shaft 1
Oa is supported by the bracket 11 in a detented state when its square shaft portion is inserted into the square hole 20.
Is fixed to the bracket 11 by being screwed.

As shown in FIGS. 20, 29 and 30,
This door closer has a stop means 25 for stopping the door 2 at a desired position between the bracket 11 and the second link 6.

The stop means 25 is connected to the second link 6
And a projection 26 provided on the bracket 11 side. The convex portion 26 and the concave portion 27 may be exchanged between the second link 6 and the bracket 11. The convex portion 26 or the concave portion 27 may be provided not only at one position but also at a plurality of positions, in which case the door 2 can be stopped and held at a plurality of positions.

As shown in FIGS. 31 to 36, the recess 27 includes a slide cam 27a and a holder 27b having a guide groove for slidably holding the slide cam 27a. The slide cam 27a and the holder 27b are shown in FIG.
0, 29 and 30, the second link 6 is attached to the end opposite to the hinge 5. A spring 33 and a stopper pin 34 are provided between the slide cam 27a and the holder 27b, and the tip of the slide cam 27a protrudes by a predetermined amount on the side opposite to the pinion shaft 10a. A groove is formed at the tip of the slide cam 27a, into which the roller 26a constituting the convex portion 26 fits. The spring 33 may be omitted, and the slide cam 27a itself may be made of a leaf spring or the like to have a stop function.

The projection 26 includes a roller 26a fixed to the bracket 11 as shown in FIGS. A roller arm 35 is superimposed on the lower surface of the support arm 11a of the bracket 11, and a pin shaft 36 hangs from the tip of the roller arm 35, and the roller 26a is rotatably supported by the pin shaft 36. The roller arm 35 is fitted on the pinion shaft 10a and is fixed to the bracket 11 with fixing screws 37. A plurality of screw holes 38 of the fixing screw 37 are formed on an arc centered on the pinion shaft 10a.
By using a desired screw hole 38, the fixing position of the roller arm 35 can be appropriately changed. Serration or the like may be used instead of the fixing screw 37 and the screw hole 38 to form a pinion shaft
And the roller arm 35 may be provided so as to subdivide the stop position. Further, by providing the rollers 26a at several places, the stop holding position of the door 2 can be set at several places.

According to the stop means 25 having the above-described structure, when the door 2 is opened, the second link 6 is relatively rotated with respect to the bracket 11 as shown in FIGS. 20 and 40. (B) As shown in (B) and (C), the concave portion 27 goes over the mountain of the concave portion 27 and retreats toward the pinion shaft 10a against the urging force of the spring 33 and fits into the groove of the concave portion 27. Thereby, the second link 6 stops at the position, and the door 2 stops at the opening position. When the door 2 is further opened, the concave portion 27 rides over the convex portion 26 on the opposite side as shown in FIG. 40 (D), and when the next convex portion 26 exists, the convex portion 2
6 and stop. When closing door 2, see FIG.
As shown in (C), (B) and (A), the concave portion 27 gets over the convex portion 26 toward the original position.

Next, the operation of the door closer having the above configuration will be described.

In the closed state shown in FIGS. 20A, 23 and 27, the spring 12 in the second link 6 urges the piston 13 rightward in FIG. 23, and the rack 17a is moved from the teeth of the pinion 10. break away. In this state, the second link 6 is going to overlap with the first link 4 and the door 2 keeps the door closed.

When the closed door 2 is opened, the hinge pins 3
As shown in FIGS. 20B and 20C, the first link 4 is pulled by the rotation of the door 2 with the fulcrum as a fulcrum, and the second link 6 rotates around the pinion shaft 10a in a counterclockwise direction in the figure. Try to. As a result, the piston 13 moves in one direction in the cylinder 6a via the rack 17a, and the oil in the cylinder 6a flows from the one chamber 14a of the spring 12 to the other chamber 14b through the check valve 15. Also, the piston 13 is simultaneously
, And the spring 12 stores the door closing force.

When the stop means 25 is set so as to stop the door 2 at a desired position between (B) and (C) of FIG. 20, the convex portion 26 is fixed to a corresponding portion on the bracket 11 in advance. Keep it. When the door 2 is opened, the second link 6
Rotates with respect to the bracket 11 on the door 2, the concave portion 27 on the second link 6 side moves on a circle centered on the pinion shaft 10 a, and is the convex portion 26 on the support arm 11 a of the bracket 11. It fits into the roller 26a. This uneven part 2
The mating force of 7, 26 overcomes the restoring force of the spring 12, and maintains the first and second links 4, 6 at the bending angle at that time. As a result, the door 2 stops at the position between (B) and (C) in FIG.

To close the door 2 in the open state, the door 2 may be pushed in the closing direction to release the concave portion 27 from the convex portion 26, whereby the spring 12 causes the piston 13 and the rack 17 to move.
a in the cylinder 6a in the opposite direction, and the rack 17a attempts to move toward the one chamber 14b. As a result, the second link 6 rotates in a direction overlapping with the first link 4, and the door 2 rotates in the closing direction with the hinge pin 3 as a fulcrum to close the entrance as shown in FIG. When the door 2 closes, the oil in the counter-spring-side chamber 14b of the cylinder 6a releases the check valve 1
The air is sent to the speed adjusting valve 16 by the shut-off action of 5, and returns to the spring side chamber 14a while the flow rate is regulated by the speed adjusting valve 16. Thereby, the restoring force of the spring 12 is gradually released, and the door 2 gently self-closes.

<Third Embodiment> A third embodiment has the same configuration as the first and second embodiments, except for the features described below. Therefore, description of the same configuration is omitted,
The description of the basic operation is also omitted.

As best understood from FIG. 42, in this door closer, the turning surfaces of the first link 4 and the second link 6 are located on substantially the same plane.

That is, as is apparent from FIGS. 2 and 21, which are front views of the door closer, respectively, in the first and second embodiments, the first link 4 is replaced by the second link 6.
In the third embodiment, as shown in FIG. 42 which is a front view of the door closer, the first link 4 and the second link 6 are substantially at the same level. It is located in. As is clear from FIG. 41, when the door 2 is closed, the first link 4 is as close to the second link 6 as possible without interfering with their functions.

Since the first link 4 and the second link 6 have such a positional relationship, the end of the second link 6 (ie, the left end in FIG. 42) has a yoke 6x. The vertical pin 5a of the hinge 5 connected to the end of the first link 4 is attached to the yoke 6x.
The other end of the first link 4 (that is, the right end in FIG. 42) is connected to the support 9 via the vertical pin 8 as in the first and second embodiments. In order to satisfy the above-described positional relationship between the link 4 and the second link 6, the other end of the first link 4 is located below the position in the first and second embodiments.

The above-described positional relationship between the first link 4 and the second link 6 has the following effects: (a) The entire door closer is made compact, and in particular,
In the design impression, the first link 4 and the second link 6 can be united and a good appearance can be obtained. (B) In a state where the first link 4 and the second link 6 are connected in advance, the door 2 can be attached irrespective of the right or left hand. That is, the first link 4 and the second link 6
In the case where the positional relationship as in the first and second embodiments is provided, when the right and left hand of the door 2 is changed, the connection between the first link 4 and the second link 6 is released, The second link 6 must be turned upside down, and the hinge must be turned upside down again to be connected to the first link 4 again. However, in the third embodiment, such an operation is not necessary. (C) Due to the above-described compactness of the door closer, the door closer can be mounted as high as possible above the door 2, and the appearance of the entire door 2 is less likely to be impaired by the mounting.

In the third embodiment, a bracket 11 different from those of the first and second embodiments is used. This bracket 11 has two mounting holes 11x having a special shape and two normal circular mounting holes 1x.
1y.

The mounting holes 11x are arranged at upper and lower intervals at the left side in FIG. Each of the mounting holes 11x includes an insertion portion 11xa and an engagement portion 11xb. The insertion portion 11xa has a diameter slightly larger than the diameter of the head of the mounting screw S1 (see FIG. 42) for fixing the bracket 11. Engagement part 11xb
Extends from the insertion portion 11xa in one direction, that is, the left side in FIG. 44 with a predetermined length.
The diameter is smaller than the diameter of the head of the mounting screw S1 and slightly larger than the diameter of the shank portion.

On the other hand, the mounting holes 11y are arranged at the right side in FIG. Each of the mounting holes 11y is similar to a normal mounting hole,
It has a round hole whose diameter is smaller than the diameter of the head of the mounting screw S2 (see FIG. 42) for mounting the bracket 11 and slightly larger than the diameter of its shank.

When the bracket 11 is fixed to the door 2, first, two mounting screws S 1 are temporarily fixed to predetermined positions on the door 2. Next, the temporarily fixed mounting screws S1 are inserted into the insertion portions 11xa of the mounting holes 11x of the bracket 11, respectively. In this state, the entire bracket 11 is moved to the right. Next, two more mounting screws S2 are attached to the mounting holes 11 of the bracket 11.
y and screwed into the door 2. Finally, the temporarily fixed mounting screw S1 is tightened, whereby the mounting of the bracket 11 is completed. The fastening of the mounting screws S1 and S2 is performed by opening the door 2,
This is performed while the second link 6 is rotated.

According to the bracket 11 described above, the mounting to the door 2 can be performed very easily, and the mounting screws S1 and S2 are hardly exposed in the state after the mounting, so that the appearance can be maintained well. Can be. Also,
The mounting seat for the bracket 11 can be made smaller.

FIG. 45 shows a first modification of the stop means. In the first embodiment, a ball is used as the convex portion 26 constituting the stop means, and the concave portion 2 of the convex portion 26 is used.
In order to allow fitting into and disengaging from 7,
Although a structure in which the ball is urged by a spring 29 is employed, in this first modified example, in order to allow the protrusion 26 to fit into the recess 27 and to be separated therefrom, the support in the bracket 11 is used. The elastic deformation of the arms 11a and 11b is used.

That is, as in the first embodiment, a plurality of holes 32 are formed in the bracket 11 (see FIG. 41), and the recess 27 is fitted into a desired hole 32 (see FIG. 46). , The convex portion 26 fitted into the concave portion 27
Is immovably provided at the end of the second link 6. That is, the protrusion 26 may be simply formed at the end of the second link 6, and it is not necessary to adopt a combination of a ball and a spring as in the first embodiment.

In this case, when the projection 26 fits into the recess 27 and when the projection 26 separates from the recess 27, the support arms 11a and 11b of the bracket 11 are elastically deformed. The state before the elastic deformation of these support arms 11a and 11b is indicated by a two-dot chain line in FIG. Convex part 26 and concave part 2
7 may be replaced between the second link 6 and the bracket 11. The convex portion 26 or the concave portion 27 may be provided not only at one position but also at a plurality of positions, in which case the door 2 can be stopped and held at a plurality of positions.

According to the above-described first modification of the stop means, it is not necessary to employ a combination of a ball and a spring, so that the structure of the stop means can be significantly simplified, and the manufacturing cost can be reduced.

FIG. 46 shows a second modification of the stop means. In the second modified example, as in the first modified example, the convex portion 26 is immovably provided at the end of the second link 6, but instead of the concave portion 27 described above, it extends over a predetermined area. The friction elastic member 39 provided is used. The friction elastic member 39 has an operation of holding the convex portion 26 at an arbitrary position within the range of the friction elastic member 39 when the convex portion 26 is forcibly pressed. That is, FIG. 46 (A) shows a state in which the protrusion 26 is not in contact with the frictional elastic member 39, but as shown in FIG. , The position with respect to the friction elastic member 39 is held by the convex portion 26. As shown in FIG.
Even if 6 moves further within frictional elastic member 39, this moved state is maintained.

According to the second modification, the friction elastic member 3
The door 2 can be stopped at an arbitrary position within the range where 9 is provided. Further, similarly to the first modification, it is not necessary to employ a combination of a ball and a spring, so that the structure of the stop means can be significantly simplified, and the manufacturing cost can be reduced.

In the first to third embodiments, the door closing speed control means is housed in the second link 6, but may be housed in the first link 4 if necessary.

[0067]

According to the first aspect of the present invention, since the door closing speed control means is accommodated in the first link or the second link, not only the number of parts of the door closer is reduced, but also the door closer is controlled. The appearance is improved and the aesthetic appearance of the door is not impaired.

According to the second aspect of the present invention, the stop means is provided between the second link and the bracket on the door side, so that the response performance of the stop operation of the door is improved. Further, it is possible to easily set the stop holding position on a plurality of positions on the bracket, which is highly practical.

According to the third aspect of the present invention, since the rotation surfaces of the first link and the second link are substantially on the same plane,
The entire door closer is made compact, and can be easily installed regardless of the right or left.

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view showing a door closer according to the present invention together with its movement.

FIG. 2 is a front view showing the door closer when the door in FIG. 1 is closed.

FIG. 3 is a left side view showing the door closer when the door in FIG. 1 is closed.

FIG. 4 is a partially cutaway plan view showing a second link in the door closer shown in FIG. 1 together with a bracket.

5 is a horizontal sectional view showing the second link shown in FIG. 4 together with a bracket.

FIG. 6 is a front view showing a second link together with a bracket.

FIG. 7 is a vertical sectional view showing a second link together with a bracket.

FIG. 8 is a left side view showing the second link shown in FIG. 7 together with a bracket.

FIG. 9 is a right side view showing the second link shown in FIG. 7 together with a bracket.

FIG. 10 is an explanatory diagram showing a positional relationship between a second link and a bracket when the door is opened.

FIG. 11 is a sectional view showing another portion of the second link shown in FIG. 10;

FIG. 12 is an explanatory diagram showing an operation of a stop means together with a second link.

FIG. 13 is an explanatory diagram showing the operation of the stop means.

FIG. 14 is a plan view of a bracket.

FIG. 15 is a front view of the bracket.

FIG. 16 is a vertical sectional view of a bracket.

FIG. 17 is a plan view of a cam of the stop means.

FIG. 18 is a front view of a cam of the stop means.

FIG. 19 is a side view of the cam of the stop means.

FIG. 20 is a horizontal sectional view showing a door closer according to another embodiment of the present invention together with its movement.

21 is a front view showing the door closer when the door in FIG. 20 is closed.

FIG. 22 is a side view showing the door closer when the door in FIG. 20 is closed.

FIG. 23 is a vertical sectional view of a second link in the door closer.

FIG. 24 is a left side view showing the second link shown in FIG. 23 together with a bracket.

FIG. 25 is a right side view showing the second link shown in FIG. 23 together with a bracket.

FIG. 26 is a plan view of the second link shown in FIG. 23.

FIG. 27 is a partially cutaway plan view of the second link when the door is closed.

FIG. 28 is a partially cutaway plan view of the second link when the door is opened.

FIG. 29 is a plan view showing stop means together with a door closer.

FIG. 30 is a front view showing stop means together with a door closer.

FIG. 31 is a plan view of a cam device of the stop means.

FIG. 32 is a vertical sectional view of a cam device of the stop means.

FIG. 33 is a right side view of the cam device shown in FIG. 32.

FIG. 34 is a plan view of a cam of the cam device.

FIG. 35 is a vertical sectional view of a cam.

FIG. 36 is a right side view of the cam shown in FIG. 35.

FIG. 37 is a plan view of a bracket.

FIG. 38 is a front view of the bracket.

FIG. 39 is a vertical sectional view of a bracket.

FIG. 40 is an explanatory diagram showing the operation of the stop means.

FIG. 41 is a plan view showing a door closer according to still another embodiment of the present invention.

FIG. 42 is a front view showing the door closer of FIG. 41.

FIG. 43 is a left side view showing the door closer of FIG. 41.

FIG. 44 is a front view showing a bracket of the door closer of FIG. 41.

FIG. 45 is a view showing a first modification of the stop means.

FIG. 46 is a view showing a second modification of the stop means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Doorway frame 2 ... Door 4 ... First link 5 ... Hinge 6 ... Second link 7 ... Door closing speed control means 11 ... Bracket 25 ... Stop means

Claims (3)

[Claims] 1. A first link having one end rotatably connected to an entrance frame, one end connected to the other end of the first link via a hinge, and the other end pivoting to the door of the entrance frame. In a door closer having a second link operably connected and a closing speed control means for controlling a closing speed of the door, the closing speed control means is housed in the first link or the second link. Door closer characterized by being done. 2. The method according to claim 1, wherein the second link is connected to the door via a bracket, and stop means for stopping the door at a desired position is provided between the bracket and the second link. The door closer according to claim 1, wherein: 3. The rotation surface of the first link and the second link are substantially flush with each other.
Or the door closer according to claim 2.