JP2001200675A - Stop device for door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a stop device for a door closer capable of easily adjusting the stop position when a door is opened and preventing the defective meshing of serrations. SOLUTION: This stop device for a door closer is provided with a stopper member 9 connected to the bracket 1 of the door closer via a pair of serrations 8a, 9a, a steel ball 3 coupled with the stopper member 9 to block the movement of the door in the closing direction when the opening of the door reaches the prescribed angle, a ball receiving member 4, a coil spring 5, and a cam mechanism moving a pair of serrations 8a, 9a in the rotation axis direction to switch the connection and disconnection between the bracket 1 and the stopper member 9. The cam mechanism is provided with a cam member 13 capable of switching a connecting position and a disconnecting position between the bracket 1 and the stopper member 9 and an elastic member 11 generating the force for holding the cam member 13 at the connecting position and the disconnecting position respectively.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closer stop device for holding a door open.

[0002]

2. Description of the Related Art As a stop device of this kind, there is a Japanese Utility Model No. 1
Japanese Patent Publication No. -30526 discloses that a stop cam is provided at a connection point between a main arm and a link of a door closer, and the stop cam and the main arm are connected via a pair of serrations so that both can be integrally rotated with respect to the link. In addition to
Inside the link, a mechanism for engaging the stop cam when the door is opened to a predetermined angle to prevent the door from returning in the closing direction (for example, a steel ball is pressed against the outer peripheral surface of the stop cam using a coil spring) Mechanism). According to this device, the stop position of the door can be adjusted by changing the mounting angle of the stop cam with respect to the main arm by loosening the bolt for tightening the pair of serrations.

[0003]

In the conventional device, the bolt can be tightened even in a state where a pair of serration peaks are in contact with each other and the two are not engaged at all, or when both are incompletely engaged. Since the meshing state between the serrations cannot be visually recognized from the outside, there is a possibility that the worker may complete the operation without obtaining the correct meshing. If the door is opened and closed in this state, the serration peaks may slip and become disengaged, the serration peaks may be scraped off, and a collision between the peaks may generate an impact sound. If the door is repeatedly opened and closed while the engagement of the serrations is incomplete, the serrations may be repeatedly slipped and the serrations may be worn. Once worn, it cannot be re-assembled, necessitating component replacement. Since the door closer is mounted on the upper part of the door, it is troublesome to adjust the stop position of the door by operating the bolt after assembling the door once.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a door closer stop device which can easily adjust a stop position when a door is opened and can prevent poor engagement of serrations.

[0005]

Hereinafter, the present invention will be described with reference to the drawings showing embodiments of the present invention. However, the present invention is not limited to the illustrated embodiment.

According to a first aspect of the present invention, one of a pair of door closer parts (1, 2) rotatably connected to each other on a predetermined rotation axis and a pair of serrations (8a,
Means (3, 9) for engaging with the stopper member (9) connected via the 9a) and stopping movement of the door in the closing direction by engaging with the stopper member (9) when the opening of the door reaches a predetermined angle. 4,
5) A stop device for a door closer comprising:
In the movement stroke of the pair of serrations (8a, 9a) in the direction of the rotation axis, holding for selectively switching and holding the connected state and the disconnected state of one door closer part (1) and the stopper member (9). The above-mentioned object is achieved by providing means for selectively switching the holding means between a predetermined connection position and a predetermined disconnection position.

According to a second aspect of the present invention, in the door closer stop device of the first aspect, the holding means moves the pair of serrations in the direction of the rotation axis, and includes one door closer part (1) and a stopper member (9). And a cam mechanism for switching between connection and disconnection.

According to a third aspect of the present invention, in the door closer stop device of the second aspect, the cam mechanism has a position (Pon) at which one of the door closer parts (1) and the stopper member (9) are connected, and a connection. A cam member (13) that can be switched to a release position (Poff) and the cam member (1)
An elastic member (11) for generating a holding force is provided at each of a position (Pon) for connecting 3) and a position (Poff) for releasing the connection.

[0009]

FIG. 1 is a view showing an entire door closer in which a stop device according to a first embodiment of the present invention is incorporated. The door closer includes a door closer body 18 mounted on an upper portion of a door D, and a bracket 1 fixed from below to an upper frame Fu of a door frame F provided around the door D.
And One end of a rectangular cylindrical stop link 2 is rotatably connected to the bracket 1. A link 16 is screwably mounted on the other end of the stop link 2, and the tip of the link 16 is rotatably connected to one end of an arm 17. The other end of the arm 17 is connected to a rotation shaft of the door closer main body 18.

FIG. 2 shows a state where the connecting portion between the stop link 2 and the bracket 1 is viewed obliquely from below, FIGS. 3 and 4 show the internal structure of the connecting portion, and FIG. 5 shows an exploded state of the connecting portion. ing. As shown in these figures, a steel ball 3, a ball receiving member 4, and a coil spring 5 are inserted into the inside of the stop link 2. The coil spring 5 is compressed by a set screw 6, and the ball receiving member 4 and the steel ball 3 are urged toward the bracket 1 by the repulsive force. A slit 2a is provided at a connection end of the stop link 2 with the bracket 1, and a serration shaft 8 and a cam retainer 10 are respectively mounted in through holes 7, 7 opened in the slit 2a. The serration shaft 8 is fixed to the bracket 1 at its upper end. The cam retainer 10 is movable in the axial direction with respect to the through hole 7.

A plate cam 9 as a stopper member is rotatably mounted on the outer periphery of the lower end of the serration shaft 8, and is supported from below by a cam retainer 10. The steel ball 3 described above is pressed against the outer periphery of the plate cam 9.
As shown in FIGS. 6A and 6B, on the outer periphery of the plate cam 9, an arc portion 9 c coaxial with the fitting hole 9 b for the serration shaft 8, and a pair of tangentially extending from both ends of the arc portion 9 c. Linear portions 9d, 9d and their linear portions 9d, 9d
And an arcuate fitting recess 9e connecting the two. A serration 9a is formed on the upper surface of the plate cam 9. The serration shaft 8 has a serration 9 a of the plate cam 9.
The serrations 8a are formed so as to mesh with the serrations 8a.

In FIGS. 6 (a) and 6 (b), the serrations 9a are formed along a plane perpendicular to the axis of the fitting hole 9b. Instead, FIGS. 6 (c) and 6 (d). The serrations 9a may be provided along the cylindrical surface surrounding the axis of the fitting hole 9b as shown in FIG. Alternatively, FIG.
And (f), the serrations 9a may be provided along a conical surface surrounding the axis of the fitting hole 9b.

As shown in FIGS. 3 to 5, a screw hole 8b is formed at the center of the serration shaft 8, and a screw portion 12a of the lever shaft 12 is screwed into the screw hole 8b. Lever shaft 1
The lower end of 2 projects downward through the cam retainer 10. A disc spring 11 as an elastic member is fitted to the protruding portion, and a cam retainer 10 and a cam lever (cam member) 13 for pushing up the disc spring 11 are rotatably mounted via a pin 14.

The upper end of the threaded portion 12a of the lever shaft 12 projects above the bracket 1, and the projected portion is
Screw with 5. The adjustment nut 15 is rotated, the lower surface thereof is brought into contact with the upper surface of the bracket 1, the vertical position thereof is adjusted by the lever shaft 12, and the adjustment nut 15 is fixed by tightening. As shown in detail in FIGS. 2 and 4B, the cam lever 13 has a pair of inner cam surfaces 13 a, 13 a abutting on the disc spring 11 and a pair of outer cam surfaces 13 b abutting on the lower surface of the cam retainer 10. , 13b. Cam lever 13, pin 14, lever shaft 12, adjustment nut 1
5 and a disc spring 11 constitute a cam mechanism, and this cam mechanism acts as a holding means for selectively holding a connected state and a disconnected state between the serration shaft 8 and the plate cam 9.

In the above arrangement, when the cam lever 13 is rotated around the pin 14, the cam retainer 10 moves up and down in accordance with the change in the phase of the outer cam surface 13b, and the serrations 8a and 9a are engaged and released. Switches.

That is, when the cam lever 13 is operated to the connection position Pon shown in FIG.
9a mesh with each other, and the bracket 1 and the plate cam 9 are connected via the serration shaft 8. Therefore, it is impossible to rotate the plate cam 9 around the serration shaft 8.
When the door D (FIG. 1) is opened in this state, the bracket 1
Then, the stop link 2 rotates, and accordingly, the steel ball 3 built in the stop link 2 moves on the outer peripheral surface of the plate cam 9. When the opening of the door D reaches the predetermined position, the steel ball 3 is fitted into the fitting recess 9e of the plate cam 9, and the return of the door D in the closing direction is prevented.

On the other hand, when the cam lever 13 is moved to the uncoupling position Poff in FIG. 7A, the cam presser 10 and the plate cam 9 move below the position in FIG. Disengagement. In this state, the plate cam 9 is rotated by an arbitrary angle around the serration shaft 8, then the cam lever 13 is returned to the connection position Pon, and the serrations 8a and 9a are engaged again, thereby stopping the door D, that is, Ball 3 and plate cam 9
The degree of opening of the door D when the fitting recess 9e is fitted can be changed.

When the cam lever 13 is at the connection release position Poff in FIG. 7A or the connection position Pon in FIG.
The disc spring 11 is pushed toward the cam retainer 10 by the inner cam surface 13a of the cam lever 13, and the cam lever 13 is held at the respective positions Poff and Pon by a repulsive force against the cam spring 10. In the process of operating the cam lever 13 from the connection release position Poff to the connection position Pon, the serrations 8a, 9a
Are engaged with each other, as shown in FIGS. 7C and 7D, the maximum lift point (the point farthest from the rotation center) 13c of the inner cam surface 13a and the rotation center of the cam lever 13 (the axis of the pin 14). The disc springs 11 are pushed down to a flat state when are lined up and down. The relationship between the phase of the inner cam surface 13a and the amount of deformation of the disc spring 11 is adjusted in advance by the phase difference between the inner cam surface 13a and the outer cam surface 13b.

On the other hand, when the cam lever 13 is released from the connection release position Pof.
Serration 8 in the process of operating from f to connection position Pon
If the a and 9a do not mesh properly, the plate cam 9 and the cam retainer 10 are moved by the amount corresponding to the shift of the mesh, as shown in FIG.
It is located below the time. Therefore, as shown in FIGS. 7E and 7F, the maximum lift point 13 of the inner cam surface 13a is increased.
c before the outer cam surface 1 contacts the disc spring 11.
3b is in contact with the lower surface of the cam retainer 10, and the plate cam 9
Cannot be moved upward, so that it is impossible to operate the cam lever 13 any more. In addition, a larger repulsive force is input from the disc spring 11 to the cam lever 13 at an earlier stage of the rotation operation of the cam lever 13 as compared with a case where a normal engagement is obtained, and the cam lever 13 is pushed back to the connection release position Poff.

As described above, in the first embodiment, the quality of engagement of the serrations 8a and 9a is reflected in the operation of the cam lever 13, so that the operator can easily operate the serrations 8a and 9a.
It is possible to determine the quality of the meshing of the serrations 8a, 9a without the possibility of ending the work with the poor meshing.
Loss and wear can be prevented. Since the position of the plate cam 9 can be adjusted only by operating the cam lever 13, the door stop position can be easily adjusted as compared with a conventional device in which serrations are tightened with bolts. There is no risk of damage. Cam lever 1
Since a large force can be applied to the contact position between the disc spring 11 and the cam retainer 10 and the cam surfaces 13a and 13b by utilizing the leverage of 3, the operation force of the cam lever 13 can be reduced to make the work easier. Become like

The first embodiment described above can be implemented in various modified forms. For example, as shown in FIG. 8, the serration shaft 8 and the lever shaft 12 may be integrally formed, and the adjustment nut 15 may be omitted. In this case, the number of parts is reduced, and the assembling becomes easy. The disc spring 11 can be replaced with various elastic members such as a wave washer and a spring washer. Instead of the cam lever 13, a rotatable cam member may be mounted on the lower end of the lever shaft 12, and an end surface cam for vertically displacing the cam member may be provided on the surface facing the disc spring 11 and the cam retainer 10.

Next, a stop device according to a second embodiment of the present invention will be described with reference to FIGS. This stop device is the same as the stop device of the first embodiment of the present invention except for the following points: The movement of the cam retainer 10 is not pushed by the cam mechanism, but is directly pushed into the cam retainer 10, or Do by pulling. The serration shaft 8 has a serration 8a formed in the circumferential direction on the outer peripheral surface at the center in the length direction. The plate cam 9 has a serration 9a along the inner peripheral surface defining the fitting hole 9b, and the center of the serration shaft 8 having the serration 8a can be fitted into the fitting hole 9b having the serration 9. It is. A stopper groove 8c is formed on the outer periphery of the lower part of the serration shaft 8 as a holding means for selectively holding the connected state and the disconnected state of the serration shaft 8 and the plate cam 9, and is elastically engaged with the stopper groove 8c. A possible stopper 19 is provided on the cam retainer 10.

In the second embodiment, the same components as those of the stop device of the first embodiment are denoted by the same reference numerals, and the description of the structure is omitted.

That is, in the stop device of the second embodiment, the stop link 2 and the plate cam 9 are raised toward the bracket 1 by pushing up the cam retainer 10.
The serration 8 a of the serration shaft 8 fixed to the bracket 1 is configured to mesh with the serration 9 a of the plate cam 9.

Therefore, the cam retainer 10 can be displaced in the axial direction with respect to the serration shaft 8, but both of them can move when the cam retainer 10 separates from the serration shaft 8 by a predetermined stroke. Are connected to each other via a connecting means (not shown) for preventing falling off.

The connecting means may be of any shape as long as it regulates the maximum displacement of the cam retainer 10 relative to the serration shaft 8, and may be fixed to, for example, one of the two members. A shaft, a bolt, or the like, which is slidably mounted on one of the other, is used as the connecting means. When the structure in which the cam retainer 10 is fixed to the stop link 2 is adopted, the above-mentioned connecting means enables the stop link 2 to move with respect to the serration shaft 8 without being connected to the cam retainer 10, and It is configured to regulate the lowermost movement position of the stop link 2, and for example, forms a step portion so as to face a hole of the stop link 2 through which the serration shaft 8 is movably inserted in the axial direction thereof. The serration shaft 8 may be formed with a projection engageable with the step, so that the serration shaft 8 does not come out of the stop link 2 upward.

The holding means for selectively holding the connected state and the disconnected state between the serration shaft 8 and the plate cam 9 will be described in detail below. As described above, the stopper groove 8c is formed on the outer periphery of the lower portion of the serration shaft 8, but FIG.
As shown in FIG. 1, when the serrations 9a of the plate cam 9 are engaged with the serrations 8a of the serration shaft 8, a concave portion 10a is formed in a portion of the cam retainer 10 facing the stopper groove 8c. A stopper 19 is disposed in the recess 10 a so as to be able to protrude and retract via a compression coil spring 20.

As described above, the stopper 19 is provided with the stopper groove 8c.
, The push-up state of the cam retainer 10 is maintained, and as a result, the connection state between the serration shaft 8 and the plate cam 9, that is, the serration 8
a is held in mesh with the serrations 9a of the plate cam 9.

On the other hand, as shown in FIG.
Is moved downward with respect to the serration shaft 8, the stopper 19 is disengaged from the concave portion 10 a and contacts the lower end of the serration shaft 8. At this time, the pressed state of the cam retainer 10 is held, and as a result, the connection between the serration shaft 8 and the plate cam 9 is released, that is, the engagement between the serration 8a of the serration shaft 8 and the serration 9a of the plate cam 9 is released. Will be retained.

Next, a method of using the stop device according to the second embodiment will be described below.

First, when connecting the serration shaft 8 and the plate cam 9, the cam retainer 10 is pushed upward. By pushing up the cam retainer 10, the stop link 2 is moved.
The plate cam 9 is also pushed upward, the serrations 9a of the plate cam 9 mesh with the serrations 9a of the serration shaft 9, and the stopper 19 is engaged with the stopper groove 8c, so that the pushed-up state of the cam retainer 10 is maintained. You. Therefore, it becomes impossible to rotate the plate cam 9 around the serration shaft 8 as in the first embodiment described above. When the door is opened in this state, the stop link 2 rotates with respect to the bracket 1, and the steel ball 3 incorporated in the stop link 2 moves on the outer peripheral surface of the plate cam 9. Then, when the opening of the door reaches the predetermined position, the steel ball 3 is fitted into the fitting recess 9e of the plate cam 9, and the return of the door in the closing direction is prevented.

On the other hand, to release the connection between the serration shaft 8 and the plate cam 9, the cam retainer 10 is pulled down. By lowering the cam retainer 10, the stop link 2 and the plate cam 9 are also pulled down, and the serrations 9a of the plate cam 9 and the serrations 9 of the serration shaft 9 are reduced.
As a result, the engagement with the a is released, and the stopper 19 comes off the stopper groove 8c, so that the cam retainer 10 is kept in the lowered state. In this state, the plate cam 9 is rotated by an arbitrary angle around the serration shaft 8, and then the cam lever 13 is returned to the connection position, and the serrations 8a and 9a are engaged again, so that the door stop position, that is, the steel ball 3 It is possible to change the opening degree of the door when the fitting is made to the fitting recess 9e of the plate cam 9.

The above-described lowering of the cam retainer 10 can be performed without directly touching the cam retainer 10 without stopping the stop link 2.
Is also achieved by lowering Further, a grip portion may be formed on the cam retainer 10 in order to facilitate the lowering of the cam retainer 10.

Next, a stop device according to a third embodiment of the present invention will be described with reference to FIGS. This stop device is the same as the stop device of the first embodiment of the present invention except that the movement of the cam retainer 10 is performed not by the cam lever 13 but by the slider 21. In the third embodiment, the same reference numerals are given to the same components as those of the stop device of the first embodiment,
The description of the structure is omitted.

That is, in the stop device of the third embodiment, the cam mechanism of the first embodiment, which includes the cam lever 13, the pin 14, the lever shaft 12, the adjusting nut 15, and the disc spring 11, is not used, and At a lower end of the serration shaft 8, a shaft portion 10c is integrally formed downward along a central axis thereof.

The shaft portion 10c penetrates through the cam retainer 10 and has a slide hole 10d formed in a portion projecting downward from the lower end surface 10b in a direction perpendicular to the axis of the serration shaft 8. A lower portion of the inner peripheral surface of the shaft portion 10c that defines the slide hole 10d contacts a first contact surface 21b or a second contact surface 21c of the slider 21 which will be described later.
Working surface 1 for moving serration shaft 8 in its axial direction
Work as 0e.

The slider 21 is provided in the slide hole 10d.
Are slidably mounted in a direction orthogonal to the axis of the serration shaft 8. The slider 21 has a flat surface on the upper surface that comes into contact with the lower end surface 10b of the cam retainer 10, while a pair of protrusions 21a, 21a. On the lower surface side of the slider 21, a first contact surface 21b, a second contact surface 21c, and an inclined surface 21d connecting these are formed between the pair of protrusions 21a, 21a.

As is apparent from FIG.
The vertical distance T1 from the upper surface of the slider 21 to the first contact surface 21b is smaller than the vertical distance T2 from the upper surface of the slider 21 to the second contact surface 21c. The vertical distance T2 and the vertical distance T1 are
It is determined according to the engagement distance between the serrations 9a of the plate cam 9 and the serrations 9a of the serration shaft 9 and the moving distance required for releasing the engagement. Shaft 10c of serration shaft 8
Of course, the vertical distance of the slide hole 10d formed is slightly larger than the vertical distance T2 described above.

Next, a method of using the stop device according to the third embodiment will be described below.

First, when connecting the serration shaft 8 and the plate cam 9, the slider 21 is moved in the direction of arrow B as shown in FIG. 12B, and the second contact surface 21c is moved to the serration shaft. Working surface 1 in slide hole 10d of No. 8
0e. As a result, the serration shaft 8 is pushed down, and the serrations 9a of the plate cam 9 mesh with the serrations 9a of the serration shaft 9. Accordingly, as in the first embodiment described above, the plate cam 9
Cannot be rotated around the serration shaft 8. When the door is opened in this state, the stop link 2 rotates with respect to the bracket 1, and the steel ball 3 incorporated in the stop link 2 moves on the outer peripheral surface of the plate cam 9. Then, when the opening of the door reaches the predetermined position, the steel ball 3 is fitted into the fitting recess 9e of the plate cam 9, and the return of the door in the closing direction is prevented.

On the other hand, when the connection between the serration shaft 8 and the plate cam 9 is released, the slider 21 is moved in the direction of arrow A as shown in FIG.
1b is brought into contact with the working surface 10e of the slide hole 10d of the serration shaft 8. As a result, the serration shaft 8 moves upward, and the engagement between the serration 9a of the plate cam 9 and the serration 9a of the serration shaft 9 is released. In this state, the plate cam 9 is rotated by an arbitrary angle around the serration shaft 8, and then the cam lever 13 is returned to the connection position, and the serrations 8a and 9a are engaged again, so that the door stop position, that is, the steel ball 3 It is possible to change the opening degree of the door when the fitting is made to the fitting recess 9e of the plate cam 9.

In order to ensure that the serration shaft 8 moves upward, the stop link 2 and the bracket 1
In the meantime, an elastic means such as a disc spring similar to that in the first embodiment may be arranged on the serration shaft 8. This elastic means is not limited to a disc spring, and any form may be used as long as it has an action of separating the stop link 2 from the bracket 1, and for example, a coil spring may be used.

The stop device according to the first to third embodiments of the present invention is not limited to the position between the bracket 1 and the stop link 2;
Alternatively, it may be provided between the arm 17 and the door closer main body 18.

In the above, a so-called parallel type door closer in which the door D is substantially parallel to the link 16 and the arm 17 when the door D is closed has been described.
The present invention is also applicable to a so-called standard type door closer in which the arm 6 and the arm 17 are substantially perpendicular to the door D.

[0045]

As described above, according to the first aspect of the present invention, in the movement stroke of the pair of serrations in the direction of the rotation axis, the connection state and the connection release of one of the door closer parts and the stopper member. Since the holding means for selectively holding the state is provided, it is possible to easily adjust the stop position when the door is opened.

According to the second aspect of the present invention, since the holding means is constituted by a cam mechanism for moving the pair of serrations in the direction of the rotation axis, the meshing state of the serrations can be reduced only by operating the cam mechanism. The stop position when the door is opened can be adjusted by changing the position, and the stop position of the door can be easily adjusted as compared with the case where the serration is tightened with a bolt. The stop position can be easily adjusted even after the door closer is mounted on top of the door. Since the meshing state of the serrations and the position of the operating portion of the cam mechanism can be associated with each other to determine the quality of the meshing of the serrations from the outside, there is no danger of completing the adjustment of the door stop position while the meshing of the serrations is poor. Work reliability is improved. By moving the serration by expanding the operation force input to the cam mechanism, the burden on the operator can be reduced and the working efficiency can be further improved.

According to the third aspect of the present invention, when the cam member is operated to the predetermined connection position or the connection release position, the cam member is forcibly held at that position by the force of the elastic member.
Work can be performed more efficiently.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an overall configuration of a door closer in which a stop device according to a first embodiment of the present invention is incorporated.

FIG. 2 is a perspective view of a connecting portion between a bracket and a stop link in the door closer of FIG. 1 as viewed obliquely from below.

FIG. 3 is an enlarged view showing a connecting portion of FIG. 2;

FIGS. 4A and 4B are diagrams showing details of a connecting portion of FIG. 3, wherein FIG. 4A is a cross-sectional view and FIG.

FIG. 5 is an exploded view of the connecting portion of FIG. 3;

6A and 6B are diagrams showing an example of a plate cam as a stopper member incorporated in the connecting portion of FIG. 3, wherein FIG. 6A is a plan view of the first example, FIG. 6B is a side view of the first example, (C) is a plan view of the second example, (d) is a cross-sectional view of the second example, (e) is a plan view of the third example, and (f) is a side view of the third example.

FIG. 7 is a diagram showing an operation state of the connection unit of FIG. 4;

FIG. 8 is a diagram showing a modification of FIG. 5;

FIG. 9 is a view partially showing a door closer in which the stop device according to the second embodiment of the present invention is incorporated, wherein (a) is a cross-sectional view showing a meshing state between a serration shaft and a plate cam;
(B) is sectional drawing which shows the state of disengagement of serration shaft and plate cam.

FIG. 10 is an enlarged cross-sectional view showing the engagement state between the serration shaft and the plate cam of the stop device shown in FIG. 9;

11 is an enlarged cross-sectional view showing a state in which the serration shaft and the plate cam of the stop device shown in FIG. 9 are disengaged from each other.

12A and 12B are diagrams partially showing a door closer in which a stop device according to a third embodiment of the present invention is incorporated, wherein FIG. 12A is a cross-sectional view showing a state in which the serration shaft and the plate cam are disengaged, and FIG. Sectional drawing which shows the engagement state of a serration shaft and a plate cam.

FIG. 13 is a perspective view of the slider shown in FIG.

[Explanation of symbols]

 Reference Signs List 1 bracket 2 stop link 3 steel ball 4 ball receiving member 5 coil spring 8 serration shaft 8a, 9a serration 9 plate cam (stopper member) 10 cam retainer 11 disc spring (elastic member) 12 lever shaft 13 cam lever (cam member) 14 pin 15 Adjustment nut 16 Link 17 Arm 18 Door closer body Poff Disconnecting position of cam lever Pon Connecting position of cam lever

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[Procedure amendment]

[Submission date] April 2, 2001 (2001.4.2)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Claims

[Correction method] Change

[Correction contents]

[Claims]

[Procedure amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0006

[Correction method] Change

[Correction contents]

In order to solve the above-mentioned problem, the invention according to claim 1 is directed to a pair of door closer parts (1, 2) rotatably connected to each other on a predetermined axis of rotation and a pair of serrations. A stopper member (9) connected via (8a, 9a) is engaged with the stopper member (9) when the opening degree of the door reaches a predetermined angle to prevent the door from moving in the closing direction. (3, 4, 5), a stopper device for a door closer,
(9) is moved up and down on the rotation axis to
Engagement of serrations (8a, 9a) and their release
Member presser (10) for switching between
When the topper member presser (10) is pushed up, the pair of
(8a, 9a) to maintain the meshing state
Stopper means (19, 21), and the stopper member
When the presser (10) descends, the stopper member presser (1)
Connection means (21b, 10)
e) a door closer stop device having

[Procedure amendment 3]

[Document name to be amended] Statement

[Correction target item name] 0007

[Correction method] Change

[Correction contents]

[0007] The invention according to claim 2 is characterized in that the pair of selections is selected.
Is formed on the inner peripheral surface of the stopper member (9).
The serration (9a) and the stopper member (9)
Formed on the outer peripheral surface of the serration shaft (8)
2. The door rack according to claim 1, comprising a serration (8a).
Uses a Rosa stop device.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0008

[Correction method] Deleted

[Procedure amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0031

[Correction method] Change

[Correction contents]

First, when connecting the serration shaft 8 and the plate cam 9, the cam retainer 10 is pushed upward. By pushing up the cam retainer 10, the stop link 2 is moved.
The plate cam 9 is also pushed upward, the serrations 9a of the plate cam 9 mesh with the serrations 8a of the serration shaft 8 , and the stopper 19 is engaged with the stopper groove 8c, so that the cam retainer 10 is held in the pushed up state. You. Therefore, it becomes impossible to rotate the plate cam 9 around the serration shaft 8 as in the first embodiment described above. When the door is opened in this state, the stop link 2 rotates with respect to the bracket 1, and the steel ball 3 incorporated in the stop link 2 moves on the outer peripheral surface of the plate cam 9. Then, when the opening of the door reaches the predetermined position, the steel ball 3 is fitted into the fitting recess 9e of the plate cam 9, and the return of the door in the closing direction is prevented.

[Procedure amendment 6]

[Document name to be amended] Statement

[Correction target item name] 0032

[Correction method] Change

[Correction contents]

On the other hand, to release the connection between the serration shaft 8 and the plate cam 9, the cam retainer 10 is pulled down. By lowering the cam retainer 10, the stop link 2 and the plate cam 9 are also pulled down, and the serrations 9a of the plate cam 9 and the serrations 8 of the serration shaft 8 are reduced.
As a result , the engagement with the a is released, and the stopper 19 comes off the stopper groove 8c, so that the cam retainer 10 is kept in the lowered state. In this state, the plate cam 9 is rotated by an arbitrary angle around the serration shaft 8, and thereafter, the cam retainer 10 is returned to the connecting position, and the serrations 8a and 9a are engaged again. The degree of opening of the door when the fitting 3 and the fitting recess 9e of the plate cam 9 are fitted can be changed.

[Procedure amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0038

[Correction method] Change

[Correction contents]

As is apparent from FIG.
The vertical distance T1 from the upper surface of the slider 21 to the first contact surface 21b is smaller than the vertical distance T2 from the upper surface of the slider 21 to the second contact surface 21c. The vertical distance T2 and the vertical distance T1 are
Serre serrations 9a and serration shaft 8 of the plate cam 9
It is determined according to the meshing with the partition 8a and the moving distance required for the release. Shaft 10c of serration shaft 8
Of course, the vertical distance of the slide hole 10d formed is slightly larger than the vertical distance T2 described above.

[Procedure amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0040

[Correction method] Change

[Correction contents]

First, when connecting the serration shaft 8 and the plate cam 9, the slider 21 is moved in the direction of arrow B as shown in FIG. 12B, and the second contact surface 21c is moved to the serration shaft. Working surface 1 in slide hole 10d of No. 8
0e. Thereby, the serration shaft 8 pressed downward, serration 9a of the plate cam 9 Se
It meshes with the serration 8a of the ration shaft 8 . Accordingly, as in the first embodiment described above, the plate cam 9
Cannot be rotated around the serration shaft 8. When the door is opened in this state, the stop link 2 rotates with respect to the bracket 1, and the steel ball 3 incorporated in the stop link 2 moves on the outer peripheral surface of the plate cam 9. Then, when the opening of the door reaches the predetermined position, the steel ball 3 is fitted into the fitting recess 9e of the plate cam 9, and the return of the door in the closing direction is prevented.

[Procedure amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0041

[Correction method] Change

[Correction contents]

On the other hand, when the connection between the serration shaft 8 and the plate cam 9 is released, the slider 21 is moved in the direction of arrow A as shown in FIG.
1b is brought into contact with the working surface 10e of the slide hole 10d of the serration shaft 8. Thereby, the serration shaft 8 moves upward, serration 9a of the plate cam 9 and Se
The engagement of the ration shaft 8 with the serration 8a is released. In this state, the plate cam 9 is rotated by an arbitrary angle around the serration shaft 8, and thereafter, the slider 21 is returned to the connection position, and the serrations 8a and 9a are engaged again. It is possible to change the opening degree of the door when the fitting is made to the fitting recess 9e of the plate cam 9.

[Procedure amendment 10]

[Document name to be amended] Statement

[Correction target item name] 0045

[Correction method] Change

[Correction contents]

[0045]

As described above, claims 1 and 2
According to the invention, it is possible to rotate each other on a predetermined rotation axis.
One of the connected pair of door closer parts and the pair of
Stopper member connected through the
When the degree reaches a predetermined angle, it engages with the stopper member.
Means for preventing movement of the door in the closing direction.
In the stop device of the closure, the stopper member is provided.
Is moved up and down on the rotation axis to
To switch between meshing and disengaging
When the topper member presser and the stopper member presser are pushed up
To keep the pair of serrations engaged
Stopper means and the stopper member holding down
To prevent the stopper member from falling off
Means, one door closer part and the door
Selectively maintain the connection and disconnection states with the topper member.
It is possible to lifting, the adjustment of the stop position at the time of opening of the door can be easily performed.

[Procedure amendment 11]

[Document name to be amended] Statement

[Correction target item name] 0046

[Correction method] Deleted

[Procedure amendment 12]

[Document name to be amended] Statement

[Correction target item name] 0047

[Correction method] Deleted

Claims (3)

[Claims] A stopper member connected to one of a pair of door closer parts rotatably connected to each other on a predetermined rotation axis via a pair of serrations, and when a door opening degree reaches a predetermined angle. Means for engaging the stopper member to prevent the door from moving in the closing direction. The one door closer in a movement stroke of the pair of serrations in the direction of the rotation axis. Holding means for selectively switching and holding the connected state and the disconnected state between the component and the stopper member are provided,
The stop device of a door closer, wherein the holding means is capable of selectively switching between a predetermined connection position and a predetermined connection release position. 2. The apparatus according to claim 1, wherein said holding means comprises a cam mechanism for moving said pair of serrations in a direction of said rotation axis to switch connection and disconnection between said one door closer component and said stopper member. The stop device of a door closer according to claim 1, wherein 3. A cam member switchable between a position for connecting the one door closer component and the stopper member and a position for releasing the connection, and the cam member is connected to the cam mechanism. The stop device for a door closer according to claim 2, further comprising an elastic member that generates a holding force at each of the position and the position where the connection is released.