JP2000017944A - 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 engaged with and disengaged from the inner serration 8 (not shown) 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, engagement and disengagement between the inner and outer serrations 8, 6 and the fixing of their engagement are achieved by means of a control lever 22.

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 driver.

[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 body such as a click ball (not shown) that is housed in the cylindrical base A of the fork arm 5 rotatably supported on the cam plate 4 and the bracket shaft 2 and urged in the bracket shaft 2 direction. And

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 built 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.

As shown in FIG. 2, this type of stop device can incorporate a stop angle position adjusting mechanism.

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, an invention according to claim 1 is characterized in that an outer serration is formed on a part of an outer peripheral surface, a bracket shaft formed with a slit at a distal end, and a base end. A fork arm formed with a slit perpendicular to the bearing hole, and a fork arm formed at the base end of the fork arm and urged in the direction of the center axis of the bearing hole. A click body and a concave portion on the outer periphery for engaging with the click body are formed to open a mounting hole to be fitted with the bracket shaft, and an inner serration capable of engaging with the outer serration at the opening edge of the mounting hole. And a notch at a portion that is slidably fitted to the bracket shaft on the side opposite to the bracket with respect to the fork arm, and that is aligned with the bracket shaft. The operating cylinder formed, a support pin that penetrates the tip of the bracket shaft in the width direction of the slot, an operating pin that penetrates one notch of the operating cylinder in parallel with the support pin, and an operating end at one end and an operating end at the other end Ends are formed respectively, are slidably received over the slits and the cutouts of the operating cylinder, and are supported by both the supporting pins and the operating pins through the elongated holes, respectively. And a control lever guided so as to be rotatable and movable in the longitudinal direction, a cam plate is inserted into a slit of the fork arm, and the support holes and the mounting holes are aligned with a bracket. The operating cylinder is moved along the bracket shaft by pulling the operating end of the control lever toward the front and moving the operating cylinder along the bracket shaft while sliding the guide in the axial direction of the shaft. When the the down aligned in the axial direction of the bracket shaft, pushes the control lever in the locking end direction, characterized in that so as to engage the locking end to the other notch of the actuating cylinder.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 and FIG.
Denotes the bracket, and a bracket shaft 2 is fixed to the lower surface of the bracket 1 by, for example, welding.

An outer serration 6 is formed substantially at the center 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.

Further, the front end (lower end) of the bracket shaft 2
As shown in FIGS. 3 to 5, a notch is formed at a constant width including the central axis of the bracket shaft 2 to form a slit 16.

In the bracket shaft 2 configured as described above, the cam plate 4 and the base end of the fork arm 5 are inserted into the latter slit 9 and the former mounting hole 7 (see FIG. 2). ) And the latter bearing holes 11 (see FIGS. 2 and 3) are fitted rotatably and slidably in alignment.

In the illustrated embodiment, the upper collar 10 is attached to the bracket shaft 2 between the bracket 1 and the outer serration 6 to reduce the friction torque between the bearing hole 11 of the fork arm and the bracket shaft 2. The upper collar 10 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
As shown in FIG. 3 and FIG. 4, the operation cylinder 17 is slidably fitted in the.

The upper end of the operating cylinder 17 is formed into a small diameter, and rotatably fits into the bearing hole 11 of the fork arm 5 via an anti-friction collar 18 made of, for example, Teflon resin or the like and having an L-shaped cross section. ing.

The portion of the operating cylinder 17 that is aligned with the slot 16 is cut out to the same width as the notch 1.
9 and 19 are formed.

One of the notches 19, 19 (left side in FIGS. 3 and 4) of the working cylinder is used to accommodate an operation end of a control lever, which will be described later, as shown in FIG. , Its width, that is, its dimension in the vertical direction is enlarged.

In the illustrated embodiment, a lower collar 21 is fitted below the bracket shaft 2 in order to reduce the friction torque between the operating cylinder 17 and the bracket shaft 2. 21 is not an essential component of the present invention.

On the other hand, the sleeve 16 of the bracket shaft 2
In addition, a thick plate-like control lever 22 extending substantially horizontally is slidably fitted in one of the notches 19 of the operation cylinder 17 so as to straddle these.

In the illustrated embodiment, the operating end (the left end in FIGS. 3 to 5) of the control lever 22 has a rectangular knob 22.
a are integrally connected.

The control lever 22 has first and second elongated holes 23 and 24 extending in the longitudinal direction of the control lever 22 at the center and the operation end, respectively.
In the elongated hole 23, a support pin 25 that penetrates the tip of the bracket shaft in the width direction of the slotter 16 is provided.
An operating pin 26 that penetrates through one notch 19 of the operating cylinder in parallel with the support pin 25 is engaged.

With the above configuration, the control lever 22 is rotatably supported around the support pin 25, and when the knob 22a is manually operated to push and pull the control lever 22, the length of the control lever is increased. A little in the direction (elongated holes 23, 24
And the pins 25 and 26).

As will be described later, when adjusting the stop angle of the closer, the knob 22a is gripped by hand and the control lever 22 is adjusted.
Is rotated (see FIG. 3).
, The operating end of the control lever 22 is moved up and down. At this time, the locking end (right end in FIG. 3) of the control lever 22 is in the inner cylinder portion of the operating cylinder 17 and does not interfere with the operating cylinder. The dimensions of each part of the control lever 22 are set.

In the embodiment shown in the drawings, the knob 22a is pushed up and pushed toward the locking end when the door closer is used. In this case, the locking end of the control lever 22 is moved to the other end of the operating cylinder 17. The dimensions of each part of each member are set so as to engage with the notch 19 and abut against the bottom surface thereof (see FIG. 4).

Further, as shown in FIG.
Is fully raised by operating the control lever 22,
The dimensions of each part are set such that the inner serrations 8 of the cam plate 4 and the outer serrations 6 of the bracket shaft 2 are aligned in the axial direction of the bracket shaft.

In FIGS. 3 and 4, reference numeral 27 denotes a disc spring. The disc spring has a slit (not shown) formed radially so that large elastic deformation is possible.

In the stop angle adjusting mechanism according to the embodiment of the present invention constructed as described above, in the normal state, that is, in the use state of the door closer, as shown in FIG. It is rising.

At this time, as described above, the outer serrations 6 of the bracket shaft and the inner serrations 8 of the cam plate are aligned and mesh with each other in the axial direction of the bracket shaft 2.

Therefore, the rotation of the cam plate 4 around the bracket shaft 2 is restrained, that is, the cam plate 4 is fixed to the bracket shaft 2, so that the fork arm 5 is connected to the bracket shaft 2 as described above. On the other hand, when the relative rotation is made by a predetermined angle, the click body (not shown) built in the fork arm 5 fits into the concave portion 3 of the cam plate 4, so that 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.

In order to do so, pick 2 from the normal state shown in FIG.
Operate 2a to move it to the left in the figure, and then
Is lowered.

Then, as shown in FIG.
Is pushed downward by the control lever 22, and the operating cylinder 1
7 is integrally lowered, the fork arm 5 is driven by the operating cylinder 17 and lowered by the elastic force of the disc spring 27.

As a result, the engagement between the outer serrations 6 of the bracket shaft and the inner serrations 8 of the cam plate is released, and the cam plate 4 becomes free, so that the cam plate 4 is turned at a predetermined angle clockwise or counterclockwise. To reset the relative angular position of the cam plate 4 with respect to the bracket shaft 2.

After resetting the angular position of the cam plate 4, FIG.
After the knob 22a is fully lifted, it is pushed toward the locking end of the control lever as shown in FIG.

Then, the outer serration 6 and the inner serration are meshed again while maintaining a new relative angular position,
A new stop angle is set in this way.

At the same time, the locking end of the control lever 22 engages with the other notch 19 of the operating cylinder 17 (see FIG. 4).
The operating cylinder 17 is locked to the support pin 25 fixed to the bracket shaft 2 via the control lever 22, and the operating cylinder 17 is effectively prevented from coming off from the bracket shaft 2.

In the illustrated embodiment, a disc spring 27 is elastically mounted between the bracket 1 and the fork arm 5, and the elastic force of the disc spring 27 controls the movement of the fork arm 5 when adjusting the stop angle. Although it is easy, since it is obvious that the present invention can be realized without this disc spring,
This disc spring is not an essential component of the present invention.

[0044]

As is apparent from the above description, according to the present invention, the forearm and the cam plate mounted on the bracket shaft are moved up and down along the bracket shaft by operating the operating cylinder and the control lever. The inner serration and the outer serration of the bracket shaft can be disengaged and the engagement of the inner and outer serrations can be stably fixed by the control lever, so the stop angle position of the door closer can be adjusted arbitrarily without tools. Achieve the intended goal of being able to.

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

FIG. 5 is a bottom 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.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 bracket 2 bracket shaft 3 concave portion 4 cam plate 5 fork arm 6 outer serration 7 mounting hole 8 inner serration 9 slit 10 upper collar 11 support hole 16 triwale 17 operating cylinder 19 notch 22 control lever 22a knob 23 first elongated hole 24 first 2 long hole 25 support pin 26 operating pin

Claims (1)

[Claims] An outer serration is formed on a part of an outer peripheral surface, a bracket shaft formed with a slit at a distal end thereof, and a support hole for fitting the bracket shaft at a base end, and a slit perpendicular to the support hole. A fork arm formed at the base end of the fork arm, and a click body urged in the direction of the center axis of the support hole, and a concave portion which engages with the click body on the outer periphery is formed. A cam plate having an inner serration that can be engaged with the outer serration at the opening edge of the mounting hole and slidable on a bracket shaft on a side opposite to the bracket with respect to the fork arm, while opening a fitting hole to be fitted. And an operating cylinder having a notch formed at a portion where the bracket shaft is aligned with the slotted shaft, and penetrating the tip end of the bracket shaft in the width direction of the slotted shaft. A support pin, an operation pin that penetrates one notch of the operation cylinder in parallel with the support pin, an operation end at one end, and a locking end at the other end, respectively, and straddle the slit and the cutout of the operation cylinder. While being slidably stored,
A control lever supported by both the support pin and the operating pin through the elongated hole, and guided to be rotatable around the support pin and movably in the longitudinal direction. With the bearing hole and the mounting hole aligned, guide them slidably in the axial direction of the bracket shaft, and pull the operating end of the control lever forward to move it up and down. The operating cylinder is moved along the bracket shaft, and when the inner serrations of the cam plate and the outer serrations of the bracket shaft are aligned in the axial direction of the bracket shaft, the control lever is pushed toward the locking end, and the locking end is moved. A stop angle adjusting mechanism for a door closer, wherein the mechanism is adapted to engage with the other notch of the operating cylinder.