JP2000017943A - Adjustment mechanism for stopping angle of door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To freely adjust, without using tools, the stopping angle of a stopping device assembled in the link mechanism of a door closer. SOLUTION: A fork arm 5 and a cam plate 4 having a recessed part formed in its outer periphery for engagement with a clicking body are moved vertically along a bracket shaft 2 so that an outer serration 6 formed on the bracket shaft 2 is locked to and unlocked from the inner serration 8 of the cam plate 4, so that the relative angle position of the cam plate 4 to the bracket shaft 2 can be adjusted. Also, movement of the fork arm 5 and the cam plate 4 and the fixing of engagement between the inner and outer serrations 8, 6 are effected by means of a control lever 24.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stop angle adjustment mechanism for a door closer (hereinafter simply referred to as a stop angle adjustment mechanism).
In particular, the present invention relates to a stop angle adjusting mechanism that can easily adjust a stop angle of a door closer without using a tool such as a screwdriver.

[0002]

2. Description of the Related Art A device for stopping a door closer, that is, a device for temporarily stopping a door closer in a closing motion,
For example, when carrying luggage into a room, it is convenient that the door does not have to be held by hand.

Various types of door closing devices have been proposed, but one that has a simple structure and reliable operation is incorporated in a link mechanism of the door closer.

As shown in FIG. 1, this stopping device is mounted on a bracket shaft 2 which is usually fixed to a door frame (not shown) via a bracket 1, and has a recess 3 which engages with a click ball described later. A click of a click ball or the like (not shown) housed in the cam plate 4 and the cylindrical base A of the fork arm 5 rotatably supported on the bracket shaft 2 and urged in the bracket shaft 2 direction. And have a body.

Then, the door closer operates in the closing direction, and the fork arm 5 rotates relatively around the bracket shaft 2 with respect to the cam plate 4 fixed to the bracket shaft 2, and is incorporated in the base A thereof. When the click ball is aligned with the concave portion 3 of the cam plate, the click ball enters the concave portion 3 and stops against the closing force of the door closer.

A stop device of this type can incorporate a stop angle position adjusting mechanism as shown in FIG.

That is, in FIG. 2, reference numeral 6 denotes an outer serration formed in the base line direction of the base of the bracket shaft 2 fixed to the bracket 1, and the outer serration 6 is an opening of the mounting hole 7 of the cam plate 4. It can mesh with the inner serration 8 formed on the edge.

The cam plate 4 formed as described above is used.
Is inserted horizontally into a slit 9 formed at the base end of the fork arm 5, and after the mounting hole 7 is aligned coaxially with the rotation axis of the fork arm, the bracket shaft 2 is connected to the base end of the fork arm 5. The inner and outer serrations 8 and 6 are inserted into the bearing holes 11 to engage at appropriate relative angular positions.

The stop angle adjusting mechanism constructed as described above includes the collars 12 and 12, the support plate 13 and the cover 1.
4 together with a set screw 15.

For this reason, if the set screw 15 is loosened, the respective components can be relatively moved in the vertical direction in FIG. 2, so that the engagement between the inner serration 8 of the cam plate 4 and the outer serration 6 of the bracket shaft is established. Therefore, the stop angle can be adjusted by retightening the set screw 15 after adjusting the relative angular positions.

[0011]

The stop angle adjusting mechanism as shown in FIG. 2 has been used as a matter of course, while exhibiting its intended function. However, every time the angle is adjusted, a driver or the like is used. It is necessary to loosen the set screw 15 with this tool, and there is a resentment that the stop angle cannot be arbitrarily adjusted on the spot.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a stop angle adjusting mechanism which can easily adjust the stop angle of a door closer at any time without using a tool such as a driver.

[0013]

In order to achieve the above object, the invention described in claim 1 comprises an outer serration on a part of an outer peripheral surface and a bracket shaft formed with a locking flange at a tip, At the base end, a support hole for fitting with the bracket shaft is opened, and a fork arm having a slit perpendicular to the support hole is formed. The fork arm is built in the base end of the fork arm and is attached in the direction of the center axis of the support hole. A click body that is urged and a concave portion that engages with the click body on the outer periphery are formed,
A cam plate having an inner serration meshing with and engaging with the outer serration at an opening edge of the mounting hole, the cam plate being provided with a fork arm. In a state where the bearing hole and the mounting hole are aligned with each other, the bearing hole and the mounting hole are guided so as to be rotatable with respect to the bracket shaft and slidable in the axial direction, while the fork arm is on the side opposite to the bracket. A cam plate fixing collar having a flange on the bracket shaft is provided so as to be slidable in the axial direction. On the other hand, one end of a control lever having an overall C-shape is rotatably supported on the locking flange, and While guiding so that it can rotate in a plane perpendicular to the bracket axis, a tapered surface is formed on the curved inner periphery of the control lever,
When the control lever rotates so as to partially surround the bracket shaft, the taper surface formed on the control lever pushes the cam plate fixing collar in the axial direction of the bracket shaft, and the outer serrations of the bracket shaft and the cam plate are rotated. The inner serrations are aligned in the axial direction of the bracket shaft.

According to a second aspect of the present invention, there is provided a bracket shaft in which an outer serration is formed on a part of an outer peripheral surface and a locking flange is formed on a distal end, and a bearing hole which is fitted on the bracket end at a base end. And a fork arm formed with a slit perpendicular to the support hole, a click body built into the base end of the fork arm and urged in the direction of the center axis of the support hole, and a click body on the outer periphery. And a cam plate having an inner serration capable of engaging and engaging with the outer serration at an opening edge of the mounting hole. In this case, this cam plate is inserted into the slit of the fork arm, and in a state where the bearing hole and the mounting hole are aligned, these can be rotated with respect to the bracket shaft,
In addition, the control lever guides the control lever so as to be slidable in the axial direction, and further rotatably supports one end of a control lever having an overall shape of a C-shape on the locking flange so that the control lever rotates in a plane perpendicular to the bracket shaft. The control lever is guided so that it can move, and a tapered surface is formed on the curved inner peripheral portion of the control lever. When the control lever is rotated so as to surround the bracket axis halfway, the tapered surface formed on the control lever is forked by the fork arm. Is pushed in the axial direction of the bracket shaft so that the outer serrations of the bracket shaft and the inner serrations of the cam plate are aligned in the axial direction of the bracket shaft.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 and FIG.
The bracket 1 has a bracket shaft 2 fixed downward on the lower surface of the bracket 1 by, for example, welding, and a pair of fixed ears symmetrically with respect to the center axis at the lower end of the bracket shaft. A disk-shaped locking flange 21 having pieces 21a and 21b is fixedly provided coaxially with the bracket shaft.

An outer serration 6 (see FIG. 3) is formed substantially in the middle of the outer peripheral surface of the bracket shaft 2. The serrations 6 are formed by connecting a number of protrusions extending in the generatrix direction of the bracket shaft 2 in the circumferential direction.

A cam plate 4 and a base end of a fork arm 5 are inserted into the bracket shaft 2, the former is inserted into the latter slit 9, and the former mounting hole 7 (see FIG. 2) and the latter support hole are provided. 11 (see FIG. 3) are fitted rotatably and slidably in an aligned state.

In the illustrated embodiment, the upper collar 18 is attached to the bracket shaft 2 between the bracket 1 and the outer serration 6 in order to reduce the friction torque between the support hole 11 of the fork arm and the bracket shaft 2. The upper collar 18 is not an essential component of the present invention.

On the other hand, the bracket shaft 2 on the side opposite to the bracket 1 (ie, below) with respect to the fork arm 5
3 and 5, a short cylindrical cam plate fixing collar 16 having a flange is slidably fitted thereto.

In the illustrated embodiment, a lower collar 17 is fitted below the bracket shaft 2 to reduce the friction torque between the cam plate fixing collar 16 and the bracket shaft 2 (see FIG. 3). However, the lower collar 17 is not an essential component of the present invention.

On the other hand, a control lever 24 is provided on the upper surface of the locking flange 21 so as to be rotatable in a horizontal plane.

The control lever 24 is a lever having an overall shape of a C-shape.
As shown in FIG. 2, one of the pair of movable ear pieces 24a and 24b is formed, and one of the movable ear pieces 24a is provided with a support hole 24c.

In order to support the control lever 24, a pin 22 parallel to the bracket shaft 2 is implanted in one fixed ear piece 21a of the locking flange 21 so as to support the control hole 24.
The control lever 24 is rotatably supported in a horizontal plane by the pin 22 fitted with the pin 4c (see FIG. 4).

The control lever 24 is connected to the bracket shaft 2
Can be set at an angular position (see FIG. 6) that encloses a half of the angle (see FIG. 6) and an angular position (see FIG. 4) that is separated from the locking flange 21.

In the illustrated embodiment, the angle at which the C-shaped notch of the control lever 24 looks at the center is set to approximately 180 °, and the inner diameter is the outer diameter of the bracket shaft 2 in the plane where the control lever 24 rotates. 2a (see FIG. 5) is set slightly larger, and a curved inner peripheral portion is formed with a tapered surface 24e whose diameter is increased upward and outward.

The C-shaped outer diameter of the control lever 24 is set to be substantially equal to the outer diameter of the cam plate fixing collar 16 (see FIG. 5).

In order to maintain the normal angular position of the control lever 24, that is, the angular position surrounding the bracket shaft 2 in a semi-stable manner, the other movable ear piece 24b of the control lever and the other fixed ear piece 21b of the locking flange. Between them, a known click device is provided.

In the illustrated embodiment, a locking ball 23 is mounted on the other fixed ear piece 21b of the locking flange so as to be able to protrude and retract, and this locking ball 23 is a compression ball incorporated in the fixed ear piece 21b. It is urged upward by the elastic force of a spring or the like.

Correspondingly, a locking hole 24d is opened in the other movable ear piece 24b of the control lever, and the control lever 24 surrounds the bracket shaft 2 halfway.
When the center of the C-shape is aligned with the center axis of the bracket shaft, this locking hole 24d engages with the locking ball 23,
The rotation of the control lever 24 is restrained to maintain its normal angular position metastable.

3 and 5, reference numeral 25 denotes a disc spring, and the fork arm 5 is urged toward the locking flange 21 by the elasticity of the disc spring 25.

A large number of slits (not shown) are formed radially in the disc spring 25 so that large elastic deformation can be obtained.

The stop angle adjusting mechanism according to the first embodiment of the present invention, which is constructed as described above, is in a normal state, that is, in a state in which the door closer is used, as shown in FIGS.
As shown in FIG. 5, the control lever 24 surrounds the bracket shaft 2 halfway, and the C-shape of the control lever is aligned with the locking flange 21.

At this time, the lower surface of the cam plate fixing collar 16 rests on the upper surface of the C-shaped portion of the control lever 24, and the inner serration 8 of the cam plate 4 and the outer serration 6 of the bracket shaft 2 are aligned with the axis of the bracket shaft 2. The formation positions of these serrations are set so that they are aligned in the directions and mesh with each other.

Therefore, the rotation of the cam plate 4 around the bracket shaft is restricted, that is, the cam plate 4 is
As described above, when the fork arm 5 rotates relative to the bracket shaft by a predetermined angle as described above, the click body (not shown) built in the fork arm 5 fits into the concave portion 3 of the cam plate 4. The door closer stops at the rotation angle.

When the door is pushed in the closing direction with a strong force, the click body gets over the concave portion 3 and disengages them, so that the door rotates in the closing direction thereafter.

To change the stop angle of the door, the relative angular position of the concave portion 3 of the cam plate with respect to the bracket shaft 2 is changed.

For this purpose, the movable ear piece 2 of the control lever 24
4b against the elasticity of the locking ball 23 as shown in FIG.
Then, the control lever 24 is rotated in the direction of the arrow 26, and is detached from the locking flange 21 (see FIG. 4).

Then, the cam plate fixing collar 16 placed on the upper surface of the C-shaped portion of the control lever 24 is lowered together with the cam plate 4 and the fork arm 5 by the elastic force of the disc spring 25 and the gravity, so that the inner side of the cam plate. The engagement between the serrations 8 and the outer serrations 6 on the bracket shaft is released.

Since the engagement between the serrations is released, the cam plate 4 can rotate around the bracket shaft 2, so that the cam plate 4 is placed at an arbitrary new angular position.

After resetting the angular position of the cam plate 4, the control lever 24 is rotated in the direction of the arrow 27 in FIG. The stop hole 24d and the locking ball 23 are engaged.

In the course of the turning operation of the control lever 24, the taper surface 24e formed on the C-shaped inner peripheral portion of the control lever and the lower surface of the cam plate fixing collar 16 and / or the fork arm 5 The control lever 24 gradually pushes up the cam plate fixing collar 16 and the fork arm 5 in the direction of the bracket 1 by the generated wedge action, and finally, the control lever 24 shown in FIG.
As shown in (2), these are pushed until they are put on the upper surface of the control lever 24.

As a result, the outer serrations 6 of the bracket shaft mesh with the inner serrations 8 of the cam plate, and a new relative angular position of the cam plate 4 with respect to the fork arm 5 is set.

In FIG. 3, the fork arm 5, the cam plate 4 and the cam plate fixing collar 16 are drawn integrally and floated between the lower end of the disc spring 25 and the upper surface of the locking flange 21. However, this is a state in which the fork arm 5, the cam plate 4, the cam plate fixing collar 16 and the bracket shaft 2 are floating due to the frictional force, and when the frictional force is small, The lower surface of the cam plate fixing collar 16 falls until it contacts the upper surface of the locking flange 21.

In this state, since the cylindrical portion 24f (see FIG. 5) comes into contact first before the tapered surface 24e contacts the lower surface of the cam plate fixing collar 16, the cam plate fixing collar 16 is pushed up by the wedge action of the tapered surface 24e. I can't.

Therefore, in such a case, the control lever 2
4 and a fingertip different from the fingertip for operating the cam plate fixing collar 16
May be operated while manually lifting upward.

In the illustrated embodiment, the control lever 24
The angle of the C-shaped notch into the center is set to approximately 180 ° in the shape of the C-shape of
0 ° or less), and the locking ball 23 and the locking hole 24d may be omitted instead.

That is, the control lever 24 is made of an elastic material such as plastic and the cylindrical portion 24 of the control lever.
If the inner diameter of f is substantially equal to the outer diameter 2a of the bracket shaft,
When the control lever 24 is aligned with the locking flange 21,
Both ends of the C-shape of the control lever open and close elastically around the center of the C-shape to engage and disengage with the outer diameter 2 a of the bracket shaft 2.

Thus, when the control lever 24 is aligned with the locking flange 21, the control lever 24 is in a state of holding the bracket shaft 2 for more than half a turn, and its movement is restricted.

Further, in this embodiment, the lower surface of the cam plate fixing collar 16 is pushed by the tapered surface 24e of the control lever 24 when returning to the normal state.
6, the lower surface of the fork arm 5 may be directly pushed.

[0050]

As is apparent from the above description, according to the present invention, the fork arm and the cam plate mounted on the bracket shaft are moved up and down along the bracket shaft, and the serration inside the cam plate and the outside of the bracket shaft are moved. Serrations can be disengaged and the fork arm and cam plate can be moved and the engagement between the inner and outer serrations can be fixed by the control lever, so that the stop angle position of the door closer can be adjusted arbitrarily without tools. To achieve the intended purpose.

[Brief description of the drawings]

FIG. 1 is an external perspective view of a link mechanism of a conventional door closer having a stop device.

FIG. 2 is an external perspective view showing components of the stop angle adjusting mechanism in a developed state.

FIG. 3 is an enlarged sectional view of a stop angle adjusting mechanism according to an embodiment of the present invention, showing a state when the stop angle is changed.

FIG. 4 is a bottom view as viewed from the arrow IV-IV line in FIG. 3;

FIG. 5 is an enlarged sectional view of the stop angle adjusting mechanism according to the embodiment of the present invention, showing a normal state when the door closer is operated.

FIG. 6 is a bottom view of FIG. 5 taken along line VI-VI.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 bracket 2 bracket shaft 3 recess 4 cam plate 5 fork arm 6 outer serration 7 mounting hole 8 inner serration 9 slit 11 support hole 16 cam plate fixing collar 21 locking flange 22 pin 23 locking ball 24 control lever 24d locking hole 24e Tapered surface 25 Disc spring

Claims (2)

[Claims] An outer serration is provided on a part of an outer peripheral surface, a bracket shaft having a locking flange formed at a tip thereof, and a support hole for fitting the bracket shaft at a base end thereof. A fork arm having a slit formed therein, a click body built in the base end of the fork arm and urged in the direction of the center axis of the support hole, and a recess formed on the outer periphery for engaging with the click body. And a cam plate having an inner serration meshable with the outer serration at an opening edge of the mounting hole, the opening being fitted with the shaft.
This cam plate is inserted into the slit of the fork arm, and in a state where the bearing hole and the mounting hole are aligned, these are guided rotatably with respect to the bracket shaft and slidably in the axial direction. A cam plate fixing collar having a flange on the bracket shaft on the side opposite to the bracket with respect to the arm is slidably provided in the axial direction, while one end of a control lever having a C-shaped overall shape is rotatable on the locking flange. The control lever guides the control lever so that it can rotate in a plane perpendicular to the bracket axis, and forms a tapered surface on the curved inner periphery of the control lever so that the control lever surrounds the bracket axis. When it moves, the taper surface formed on the control lever pushes the cam plate fixing collar in the axial direction of the bracket shaft, and the serrations on the outer side of the bracket shaft and the inner serrations on the cam plate. Door closer of stop angle adjusting mechanism Deployment and is characterized in that so as to match in the axial direction of the bracket axis. 2. An outer serration is provided on a part of an outer peripheral surface, a bracket shaft having a locking flange formed at a distal end thereof, and a support hole fitted to the bracket shaft are opened at a base end thereof, and are perpendicular to the support hole. A fork arm having a slit formed therein, a click body built in the base end of the fork arm and urged in the direction of the center axis of the support hole, and a recess formed on the outer periphery for engaging with the click body. And a cam plate having an inner serration meshable with the outer serration at an opening edge of the mounting hole, the opening being fitted with the shaft.
This cam plate is inserted into the slit of the fork arm, and in a state where the bearing hole and the mounting hole are aligned, these are guided so as to be rotatable with respect to the bracket shaft and slidable in the axial direction. One end of a control lever having a C-shape is rotatably supported on the locking flange to guide the control lever so that it can rotate in a plane perpendicular to the bracket axis. A taper surface is formed in the peripheral portion, and when the control lever rotates so as to surround the bracket shaft, the taper surface formed on the control lever pushes the base end of the fork arm in the axial direction of the bracket shaft. ,
A stop angle adjusting mechanism for a door closer, wherein an outer serration of a bracket shaft and an inner serration of a cam plate are aligned in an axial direction of the bracket shaft.