JP2002256757A - Stop device for door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To increase the coupling force of a stop device for a door closer. SOLUTION: In the stop device for the door closer, serration sections, which are provided on an extrapolation body 13 axially movably and rotatably extrapolated against a pivotal shaft 8 and the facing sections of the extrapolation body 13 and a stop link 5, comprise horizontal serration sections 14a and 14b and vertical serration sections 39a and 39b.

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 JP-A-11-50739, JP-A-2882526, and JP-A-11-303501 disclose a stop device for a door closer.
Each of these door closer stop devices has two members that rotate relative to each other in conjunction with the opening and closing operation of the door, a pivot shaft serving as a pivot between the two members fixed to one member, and a pivot with respect to the pivot. An external insert movably and rotatably extrapolated in the direction, a serration portion interposed between the external insert and one of the members facing each other, and the external insert and the other member in a predetermined positional relationship. Once reached, a stopper mechanism that regulates the relative rotation of the two members further, a holding member that is mounted to be movable in the axial direction with respect to the pivot shaft, and that opposes the outer insert, and a holding member that pivots the holding member. And a lock mechanism for selectively holding engagement and disengagement of the serration portion by moving the serration portion in the axial direction.

[0003] The stop devices of these door closers are:
Either a horizontal serration or a vertical serration is provided as the serration. The horizontal serration part
It has a number of radial grooves on a circle, and is formed on the end face of the extrapolation body and the end face of one member facing the outer insert. The vertical serration has a large number of grooves on the cylinder along its generatrix, and is formed on the inner peripheral surface of the outer insert and the outer peripheral surface of one member facing the outer insert. JP-A-11-5
The stop device disclosed in Japanese Patent No. 0739 includes one of a horizontal serration portion and a vertical serration portion.
The stop device disclosed in Japanese Patent No. 82526 includes only a horizontal serration portion, and the stop device disclosed in Japanese Patent Application Laid-Open No. H11-303501 includes only a vertical serration portion.

[0004]

In a stop device having only a horizontal serration portion, when a load in the circumferential direction is applied to an outer insert which is a plate cam at the time of a stop-on / off operation due to opening / closing of a door, the force rising to the horizontal serration. May occur, and the bolt or handle of the lock mechanism that holds the external body may become loose.

In a stop device having only a vertical serration portion, when a load in the circumferential direction is applied to the outer insert, which is a plate cam, at the time of stop-in / open-off due to the opening / closing of the door, the stop-in / out sound is generated due to the play of the inner / outer serration. Is easy to occur. In addition, since the length of the serration is required to some extent to provide the strength of the vertical serration, it is necessary to move the extrapolation body greatly in the vertical direction, that is, the axial direction of the pivot axis when setting the stop angle, and when setting the stop angle. It has been desired to reduce the amount of movement of the extrapolation body in the above.

[0006]

Means for Solving the Problems To solve the above problems, the invention according to claim 1 comprises two members (4, 5) which rotate relative to each other in response to the opening and closing operation of the door (1), and A pivot (8) which is a pivot between the two members (4, 5) fixed to the member (4 or 5), and is movable and rotatable in the axial direction with respect to the pivot (8). The extrapolated body (13) extrapolated to the above, the extrapolated body (13) and the one member (4
Or, when the serrated portion interposed in the facing portion with the above (5), the outer insert (13), and the other member (5 or 4) reach a predetermined positional relationship, the relative rotation between them is further increased. A stopper mechanism (16 or the like) for regulating, a pressing member (21) opposed to the outer insert (13) attached movably in the axial direction with respect to the pivot shaft (8), and a pressing member ( 21) a lock mechanism (24, 25, etc.) for selectively holding the engagement and disengagement of the serration portion by moving the serration in the axial direction of the pivot shaft (8). A stop device for a door closer, which is composed of both horizontal serrations (14a, 14b) and vertical serrations (39a, 39b), is employed.

[0007]

Next, embodiments of the present invention will be described with reference to the drawings.

<First Embodiment> As shown in FIG. 1, a door closer is fixed to a door closer main body 2 mounted on an upper part of a door 1 and an upper frame of a door frame 3 provided around the door 1 from below. And a bracket 4 to be provided. One end of a rectangular cylindrical stop link 5 is rotatably connected to the bracket 4. A telescopic link 6 is slidably attached to the other end of the stop link 5, and a distal end of the telescopic link 6 is rotatably connected to one end of an arm 7. The other end of the arm 7 is connected to a rotation shaft of the door closer main body 2.

As shown in FIG. 2, FIG. 3, FIG. 4, FIG. 7, and FIG. 8, the stop device of the door closer includes two members which rotate relatively in conjunction with the opening and closing operation of the door 1. In this embodiment, one member corresponds to the bracket 4 and the other member corresponds to the stop link 5.

A pivot shaft 8 serving as a pivot between the two members is fixed to the bracket 4 as one member. Bracket 4
Project from the door frame 3 in a substantially horizontal direction, and the pivot shaft 8 projects vertically downward from the horizontal tip of the bracket 4. A serration shaft 9 extending vertically downward is fixed to the tip of the bracket 4, and a male screw formed on the upper end of the pivot shaft 8 is screwed into a female screw formed on the serration shaft 9. The male screw penetrates the bracket 4 upward, and is screwed with the adjusting plate 10 applied to the upper surface of the bracket 4. The bracket 4 is sandwiched between the upper end of the serration shaft 9 and the lower surface of the adjustment plate 10 from above and below via male and female screws,
Is also fixed vertically to the bracket 4 via male and female screws. Note that the pivot shaft 8 may be fixed to the bracket 4 via a serration shaft 9 or directly with an adhesive or the like, in which case the adjustment plate 10 can be omitted.

At the end where the stop link 5 which is the other member is connected to the bracket 4, a through hole is formed in the vertical direction, and the slit 11 crosses the through hole in the horizontal direction, that is, the stop link 5. It is formed in the axial direction. The end of the stop link 5 is divided into an upper arm 5 a and a lower arm 5 b by a slot 11. The pivot shaft 8 penetrates vertically through the through hole of the stop link 5, and a serration shaft 9 integral with the pivot shaft 8 is rotatably supported in a through hole of the upper arm 5 a of the stop link 5 via a bearing 12 which is a bush. You.

An external insert 13 which is a plate cam is inserted into the slot 11 of the stop link 5. The outer body 13 is simultaneously rotatably extrapolated to the pivot 8. Slot 1
1 is formed wider than the thickness of the outer body 13, so that the outer body 13 is movable in the axial direction with respect to the pivot shaft 8.

The stop device is provided with a serration between the outer insert 13 and the bracket 4 as one member for engaging and disengaging the two. As shown in FIGS. It is composed of both horizontal serrations 14a, 14b and vertical serrations 39a, 39b.

That is, in this embodiment, the horizontal serrations 14a and 14b are formed at a portion where the outer insert 13 and the serration shaft 9 of the bracket 4 which is one of the members are opposed to each other. The facing portion is constituted by an end face of the outer insert 13 and an end face of the bracket 4 which is one of the members facing the end face, and a number of horizontal serration grooves are radially formed on each end face. In addition, the vertical serrations 39a and 39b are also formed at a portion facing the outer insert 13 and the serration shaft 9 on the bracket 4 side, which is one of the members. This opposing part is a stop link 5
The outer peripheral surface of the thin cylindrical portion 40 protruding into the slot 11 from the lower end of the thick cylindrical portion of the serration shaft 9 inserted into the through hole of It is composed of an inner peripheral surface. A number of vertical serration grooves are formed on these cylindrical opposing portions so as to extend along the cylindrical generatrix. As a result, when the outer insert 13 moves upward on the pivot 8, both the vertical serrations 39 a and 39 b and the horizontal serrations 14 a and 14 b engage with each other, and the outer insert 13 is integrated with the bracket 4. You. Conversely, extrapolation 1
3 slides downward on the pivot shaft 8, the vertical serrations 39a and 39b and the horizontal serrations 14a and 14b.
Are separated from each other, and the outer insert 13 can be rotated with respect to the bracket 4 about the pivot shaft 8 as a fulcrum.

A stop mechanism is provided inside the stop link 5 for restricting the relative rotation of the stop link 5 and the outer insert 13 when the stop link 5 reaches a predetermined positional relationship. That is, a tunnel-like cavity 15 is formed in the stop link 5 along the central axis thereof, and this cavity 15 communicates with the slot 11 from the front end of the stop link 5. A steel ball 16 is provided at a location where the cavity 15 communicates with the slit groove 11, and the cam piece 13 a at the tip of the outer insert 13 is engaged with the ball 16. The ball 16 is urged toward the slot 11 by a compression coil spring 17 which is an elastic member inserted into the cavity 15. The compression force of the compression coil spring 17 is adjusted by an adjusting screw 18 which is screwed into a female screw formed in the cavity 15.
Can be adjusted by screwing back and forth. When the stop link 5 and the outer insert 13 are relatively rotated with the opening and closing of the door 1, the cam piece 13a of the outer insert 13 engages with the ball 16 or releases the engagement. When the outer insert 13 is engaged with the ball 16, the door 1 stops at the opened angular position, and when a force is applied to the door 1 in the closing direction, the ball 16 is moved to the outer insert 1.
Then, the door 1 is closed over the third cam piece 13a.

A male screw of the telescopic link 6 is screwed into a female screw of the cavity 15 of the stop link 5, and the telescopic link 6 is
The length of the stop link 5 can be adjusted by screwing and retracting the female screw 5.

A cylindrical holding member 21 is slidably inserted into the through-hole on the lower arm 5b side divided by the slot 11 of the stop link 5 via a bearing 19 as a bush. The pivot 8 penetrates vertically through the center of the holding member 21. Further, the thin cylindrical portion 40 of the serration shaft 9 is inserted into the gap between the pivot shaft 8 and the pressing member 21, and the pressing member 21 is slidable with respect to both the pivot shaft 8 and the thin cylindrical portion 40. A plate washer 41, which is an elastic member, is applied to a position where the lower end of the pressing member 21 projects below the lower arm 5b of the stop link 5 so as to surround the pivot shaft 8. Also,
A flange 42 is formed at the lower end of the holding member 21 to contact the lower arm 5b of the stop link 5, and the holding member 21 is connected to the lower arm 5b.
From coming out of the upper direction.

Between the lower end of the pivot shaft 8 and the lower end of the pressing member 21, the pressing member 21 is moved in the axial direction of the pivot shaft 8 so that the horizontal serrations 14a and 14b and the vertical serrations 39a and 39b are moved. A lock mechanism for selectively holding engagement and disengagement is provided. The lock mechanism includes a cam 24 supported at a lower end portion of the pivot shaft 8 by a pin 23 inserted perpendicular to the pivot shaft 8, and an operation lever 25 provided integrally with the cam 24. The cam 24 comes into contact with the lower surface of the holding member 21 via the countersunk washer 41 as the elastic member. The cam 24 is, for example, a plate cam. As shown in FIGS. 7 and 8, the operating lever 25 is switched between two positions to release the pressing of the pressing member 21 and to dispose the vertical and horizontal serration portions 39a, 3a.
9b, 14a, and 14b are separated from each other, or the pressing member 21 is pressed upward so that the vertical and horizontal serrations 39a,
39b, 14a, and 14b have cam curves that mesh with each other.

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

As shown in FIG. 8, when the operation lever 25 of the lock mechanism is operated to the lock position, the cam 2 of the lock mechanism is operated.
4 presses the holding member 21 upward through the plate washer 41, the upper end of the holding member 21 pushes up the outer insert 13 and the holding member 2
The first flange 42 pushes up the stop link 5.

As a result, the lateral serrations 14a on the side of the outer insert 13 and the lateral serrations 14b on the side of the bracket 4 are provided.
And the vertical serrations 3 on the outer insert 13 side
9a and the vertical serrations 39b on the bracket 4 side mesh with each other, so that the bracket 4 and the outer insert 13 are connected and integrated.

As is clear from FIGS. 1 to 3, when the door 1 is opened in this state, the stop link 5 rotates with respect to the bracket 4, and the ball 16 incorporated in the stop link 5 is released. It moves on the outer peripheral surface of the cam piece 13a of the insert 13. When the opening of the door 1 reaches the predetermined position, the ball 16 is fitted into the fitting recess of the cam piece 13a, and the return of the door 1 in the closing direction is prevented. When the door 1 is closed, the ball 16 is released from the fitting recess of the cam piece 13a by lightly pressing the door 1, and the door 1 is automatically closed by the action of the door closer.

In order to change the opening of the door 1, as shown in FIGS. 3 and 7, the operation lever 25 of the lock mechanism may be rotated around the pin 23 to the unlock side.

When the operation lever 25 of the lock mechanism is operated to the unlock position, the holding member 21, the outer insert 13 and the stop link 5 move downward by their own weight. Thereby, the vertical and horizontal serrations 39a, 39b, 14a,
14b is disengaged.

In this state, the outer body 13 is rotated by a desired angle around the pivot shaft 8, and thereafter the operating lever 25 is returned to the locked position, and the vertical and horizontal serrations 39a, 39 are again formed.
b, 14a, 14b, the door 1
Stop position, that is, the ball 16 and the cam piece 1 of the outer body 13
The degree of opening of the door 1 when the door 3a is fitted can be changed. In the locked state, the serration shaft 9 and the extrapolation body 13 are provided with two types of vertical and horizontal serrations 39a, 39b,
Since the engagement is performed by the engagements 14a and 14b, the engagement force between them is increased, and the stop position of the door 1 is properly determined.

<Embodiment 2> A stop device of a door closer according to Embodiment 2 is shown in FIG. 9 to FIG.

As shown in FIGS. 9, 11 and 12, the stop device for the door closer according to the second embodiment is different from the first embodiment in that the pivot shaft 8 in the first embodiment has the serration shaft 9.
Has been replaced by

As shown in FIGS. 9 to 12, the lock mechanism has a tightening bolt 43, which is inserted from below the lower arm 5b of the stop link 5 toward the serration shaft 9, The male screw is screwed with the female screw of the serration shaft 9. A ring-shaped pressing plate 44 and a spring washer 45 are interposed between the bolt head 43a of the tightening bolt 43 and the lower arm 5a of the stop link 5. The holding plate 44 is configured to contact the lower surfaces of both the holding member 21 and the lower arm 5b. Spring washer 45 is bolt head 4
3a is inserted between the holding plate 44 and the holding plate 44, and the cover 46 of the holding plate 44 is inserted between the holding plate 44 and the spring washer 45 if necessary.
Is provided. The holding plate 44 is separate from the holding member 21, but may be formed integrally.

Next, the operation of the stop device of the door closer will be described.

As shown in FIG. 12, when the tightening bolt 43 of the lock mechanism is screwed into the lock position, the bolt head 4
3a presses the holding member 21 upward through the spring washer 45, the cover 46 and the holding plate 44, the upper end of the holding member 21 pushes up the outer insert 13, and the holding plate 44 pushes up the stop link 5.

As a result, the horizontal serrations 14a on the side of the outer insert 13 and the horizontal serrations 14b on the bracket 4 side
And the vertical serrations 3 on the outer insert 13 side
9a and the vertical serrations 39b on the bracket 4 side mesh with each other, so that the bracket 4 and the outer insert 13 are connected and integrated.

When the door 1 is opened in this state, the stop link 5 rotates with respect to the bracket 4, and the ball 16 built in the stop link 5 moves with the outer insert 13.
On the outer peripheral surface of the cam piece 13a. And door 1
When the degree of opening reaches a predetermined position, the ball 16
3a, the door 1 is prevented from returning in the closing direction. When the door 1 is closed, the ball 16 is released from the fitting recess of the cam piece 13a by lightly pressing the door 1, and the door 1 is automatically closed by the action of the door closer.

To change the opening of the door 1, as shown in FIGS. 9 and 11, the tightening bolt 43 of the lock mechanism is used.
Can be loosened to the unlock side.

When the tightening bolt 43 of the lock mechanism is operated to the unlock position, the pressing member 21 and the outer
And the stop link 5 moves downward by its own weight. Thereby, the vertical and horizontal serrations 39a, 39b, 14
a and 14b are disengaged from each other.

In this state, the outer body 13 is rotated by a desired angle around the serration shaft 9 which is a pivot shaft, and then the tightening bolt 43 is screwed into the lock position, and the vertical and horizontal serration portions 39a, 39b, 14a are again formed. , 14b, the stop position of the door 1, that is, the ball 16
1 when the cam piece 13a of the outer insert 13 fits with the door 1
Can be changed. In the locked state, the serration shaft 9 and the outer insert 13 are engaged by the two types of vertical and horizontal serrations 39a, 39b, 14a, and 14b, so that the engagement force between them is increased, and the stop position of the door 1 is properly adjusted. Determined.

<Third Embodiment> As shown in FIGS. 13 and 14, in the stop device for a door closer according to the third embodiment, a slot 1 of a stop link 5 is provided.
A guide cylinder 20 is slidably supported in a through hole on the lower arm 5b side divided by 1 via a bearing 19 as a bush, and a cylindrical pressing member 2 is further accommodated in the guide cylinder 20.
1 is slidably inserted. The pivot 8 penetrates vertically through the center of the holding member 21. The upper end of the guide tube 20 faces the lower surface of the outer insert 13, and the upper portion of the holding member 21 faces the lower surface of the outer insert 13 at a position lower than the guide tube 20. The guide cylinder 20 is provided on the holding member 21 with respect to the holding member 21.
Is movable while sliding in the axial direction with respect to the pivot shaft 8. A flange is formed at a position where the lower ends of the guide cylinder 20 and the holding member 21 project below the lower arm 5b of the stop link 5, and a wave washer 2 which is an elastic member is provided between both flanges.
2 has been inserted. When the pressing member 21 slides upward on the pivot shaft 8, the upper end of the guide tube 20 supported by the pressing member 21 pushes up the outer insert 13, and as a result, the vertical and horizontal serrations 39 a, 39 b, 14 a, and 14 b are respectively formed. When the pressing member 21 slides downward on the pivot shaft 8 on the contrary, the upper end of the guide tube 20 supported by the pressing member 21 separates from the outer insertion body 13, and as a result, the vertical and horizontal serration portions 39 a, The engagement between 39b, 14a and 14b is released.

The guide cylinder 20 can be omitted, and the external insert 13 can be directly moved up and down by the holding member 21. In that case, the wave washer 22 which is an elastic member is provided, for example, between the pressing member 21 and the lock mechanism.

A lock mechanism similar to that in the first embodiment is employed. When the slide cylinder 20 or the pressing member 21 is directly pressed against the outer insert 13 by this lock mechanism, a large reaction force is applied to the cam 24 on the operation lever 25, and when the stop position of the door 1 is changed, the lock of the lock mechanism is locked. -Requires a large operating force to unlock. In the third embodiment, to prevent this,
The following configuration is employed.

That is, the rolling member 26 is inserted between the three members of the holding member 21, the outer insert 13 and the pivot shaft 8 so as to be in contact with these three members. Further, on the pivot shaft 8 side, a vertical and horizontal serration portion 39a, 39b, 14 is provided by a lock mechanism.
A relief portion 28 is formed to restrain the rolling member 26 together with the pressing member 21 when a and 14b mesh with each other and release the rolling member 26 when the vertical and horizontal serration portions 39a, 39b, 14a and 14b are separated by the lock mechanism. Further, on the holding member 21 side, when the serration portions 14a and 14b are engaged with each other by the lock mechanism, the escape portion 2 of the pivot shaft 8 is provided.
A relief portion 27 that restrains the rolling member 26 together with the pressing member 8 and presses the rolling member 26 against the pressing member 21 in a direction perpendicular to the pivot shaft 8 and releases the rolling member 26 when the serration portions 14a and 14b are separated by the lock mechanism. It is formed.

The escape portion 27 on the holding member 21 side is provided with the pivot shaft 8.
Is formed as an annular concave portion formed by annularly cutting off the sliding contact surface between the outer shaft 13 and an annular wall 27a facing the sliding contact surface of the pivot shaft 8. It has an annular opening. The annular wall 27a is desirably a cylindrical wall having a wall surface parallel to the axial direction of the pivot shaft 8, for example.
It may be slightly inclined like a truncated cone. The relief portion 28 on the pivot shaft 8 side is formed as an annular groove by cutting off a sliding surface between the holding member 21 and the sliding portion. FIG.
As shown in FIG. 14, the escape portion 27 on the holding member 21 side is used.
The width between the annular wall 27a and the sliding surface of the pivot shaft 8 is slightly larger than the radius of the rolling member 26, and the depth of the relief portion 28 on the pivot shaft 8 side is the radius of the rolling member 26. It is formed to be slightly smaller than the diameter of the rolling member 26 when the depths of the two are adjusted.

As a result, as shown in FIG. 13, when the locking mechanism is unlocked and the escape portions 27 and 28 are shifted, the rolling member 26 is released from being held by the escape portions 27 and 28. In this unlocked state, the rolling member 26 is supported by the pressing member 21 and the pivot shaft 8 while being pushed out from both the escape portions 27 and 28, and the rolling member 2
An extrapolation body 13 slid downward on the pivot shaft 8 on the base 6 and separated from the serration shaft 9 rides thereon.

As shown in FIG. 14, when the lock mechanism is locked and the escape portions 27 and 28 overlap, the rolling member 26 is sandwiched and restrained by the escape portions 27 and 28. In this locked state, the horizontal serration unit 14
As a and 14b mesh with each other, forces are applied to the rolling member 26 from the pressing member 21, the outer insert 13 and the pivot shaft 8, and these three forces are balanced. The force acting on the pressing member 21 acts perpendicularly to the axial direction of the pivot shaft 8 via the annular wall 27a and does not act in the axial direction, so that it does not directly act on the lock mechanism, and the lock mechanism is unlocked. Locking can be performed with an extremely small operating force.

The rolling member 26 is, for example, a ball or a roller made of steel.
It is arranged annularly between 7, 28.

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

As shown in FIG. 14, when the operation lever 25 of the lock mechanism is operated to the lock position, the cam 24 of the lock mechanism pushes the pressing member 21 up to the outer insert 13 side. Is pushed up by the holding member 21 via the wave washer 22 which is
Abuts the lower surface of. Vertical and horizontal serrations 39a, 39
Since b, 14a and 14b are pressed against each other by the elastic action of the wave washer 22, they smoothly mesh with each other.
Subsequently, the escape portion 27 of the holding member 21 and the escape portion 28 of the pivot shaft 8 overlap each other, sandwiching the rolling member 26, and the rolling member 26 presses the outer insert 13 toward the serration shaft 9.

As a result, the vertical and horizontal serrations 39a and 14a on the outer insert 13 and the vertical and horizontal serrations 39b and 14b on the bracket 4 are strongly engaged, so that the bracket 4 and the outer insert 13 are connected and integrated. You.

In order to change the opening of the door 1, as shown in FIG. 13, the operating lever 25 of the lock mechanism may be rotated around the pin 23 to the unlock side. As described above, due to the engagement of the lateral ration portions 14a and 14b, a force acts on the pressing member 21 in a direction perpendicular to the pivot shaft 8 by the contact between the rolling member 26 and the annular wall 27a. Since no force acts in the axial direction, a large force due to the lock does not directly act on the lock mechanism. Therefore, the unlocking operation of the operation lever 25 is easily performed with a small force.

When the operation lever 25 of the lock mechanism is operated to the unlock position as shown in FIG. 13, the pressing member 21 and the guide cylinder 20 move downward by their own weight.
As a result, the escape portion 27 of the holding member 21 is displaced from the escape portion 28 of the pivot shaft 8, and the rolling member 26
The holding member 21 is released from being pinched by the holding member 28 and descends. Therefore, the outer insert 13 is released from the pressing by the rolling member 26 and descends along the pivot shaft 8 in the slit groove 11, and the vertical and horizontal serrations 39a, 39b, 14a,
14b is disengaged.

In this state, the outer body 13 is rotated by a desired angle around the pivot shaft 8, and thereafter the operating lever 25 is returned to the locked position.
b, 14a, 14b, the door 1
Stop position, that is, the ball 16 and the cam piece 1 of the outer body 13
The degree of opening of the door 1 when the door 3a is fitted can be changed.

Fourth Embodiment As shown in FIG. 15, in the stop device for a door closer according to the fourth embodiment, a lock mechanism includes an end face cam 30 formed on the lower surface of a holding member 21 and a pivot shaft 8. And an operation knob 31 rotatably held around the pivot 8 at the lower end of the control knob. A protrusion 3 is provided at a position of the operation knob 31 facing the end cam 30.
2 are formed.

When the operating knob 31 is turned from the locked position shown by the solid line in FIG. 15B to the unlocked position shown by the two-dot chain line, the projection 32 is disengaged from the lift position of the end face cam 30, and the pressing member 21 is moved 31 is released from the pressing by the projection 32, descends on the pivot shaft 8, the outer body 13 and the serration shaft 9 also descend, and the vertical and horizontal serrations 39.
a, 39b, 14a, and 14b are disengaged from each other.

Next, the external body 13 is rotated together with the serration shaft 9 around the pivot shaft 8 by a desired angle, and the operation knob 3
15B is turned from the unlocked position shown by the two-dot chain line to the locked position shown by the solid line, the projection 32 moves to the lift position of the end cam 30, and the pressing member 21 moves the projection of the operation knob 31. As a result, the outer insert 13 and the serration shaft 9 are raised by being pushed by the shaft 32, and the serrations 14a and 14b are engaged again.

<Fifth Embodiment> As shown in FIG. 16, a stop device for a door closer according to a fifth embodiment uses a screw as a lock mechanism. That is, a male screw 33 is formed at the lower end of the pivot shaft 8, and a female screw of a nut 34 is screwed to the male screw 33. Nut 34
Is screwed back and forth between the locked position and the unlocked position on the pivot 8 so that the vertical and horizontal serrations 39a,
39b, 14a, and 14b can be switched between meshing and separation. The nut 34 may be a simple nut or a wing nut.

Although the stop device is provided between the bracket 4 and the stop link 5 in each of the above embodiments, the present invention is not limited to this. For example, the stop device is provided between the telescopic link 6 and the arm 7. Alternatively, it may be provided between the arm 7 and the door closer main body 2.

In each of the above embodiments, a so-called parallel type door closer in which the door 1 is substantially parallel to the telescopic link 6 and the arm 7 when the door 1 is closed has been described. The present invention can be applied to a so-called standard type door closer that is substantially orthogonal to the door 1.

[0056]

According to the conventional stop device having only the horizontal serration portion, when the lateral serration receives a circumferential load applied to the outer insert when the stop is released, the lifting force is generated, and the outer insert is held down. Malfunctions such as loosening of the lock mechanism bolt and handle
According to the first aspect of the present invention, it is possible to properly prevent the horizontal serrations from lifting up, ie, separating from each other, by combining the vertical serrations that are resistant to a load in the circumferential direction with the horizontal serrations. In addition, if the locking mechanism is operated in a state where the engagement of the horizontal serrations is insufficient when the conventional stop angle is set, the tightening is performed while the engagement is insufficient, and insufficient engagement of the horizontal serrations occurs. However, according to the first aspect of the present invention, the vertical serrations rising perpendicularly to the circumferential direction are united, thereby engaging the vertical serrations. As a result, the meshing position of the horizontal serrations can be guided, and the horizontal serrations can be reliably meshed.

Further, in the conventional stop device having only the vertical serrations, when the vertical serrations are subjected to a circumferential load, the stop engagement / release sound may be generated due to the play of the inner and outer serration grooves. According to the first aspect of the invention, the stop engagement / release sound can be properly eliminated by combining the horizontal serrations having no rattling in the circumferential direction. In addition, since the vertical serration portion requires a certain length of the serration groove in terms of strength, it was necessary to move one of the two members greatly in the vertical direction when setting the stop angle. According to the invention according to claim 1, By integrating the horizontal serrations, it is possible to share the circumferential load applied to the extrapolated body, so that the overall length of the vertical serrations, which was necessary for strength, can be shortened. On the other hand, the amount of movement in the vertical direction can be reduced.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an entire door closer in which a stop device of the present invention is incorporated.

FIG. 2 is a perspective view showing a state where a connecting portion between a stop link and a bracket of the door closer is viewed obliquely from below.

FIG. 3 is a cross-sectional view illustrating an internal structure of a connecting portion illustrated in FIG. 2;

FIG. 4 is a bottom view of the connecting portion shown in FIG. 2;

FIG. 5A is a half-sectional view showing a serration axis,
(B) is a bottom view of the serration axis.

FIG. 6A is a plan view of an extrapolation body, and FIG. 6B is a full sectional view of the extrapolation body.

FIG. 7 is an enlarged view of the internal structure of the connecting portion shown in FIG. 3, showing a state where the serration portion is separated.

FIG. 8 is an enlarged view of the internal structure of the connecting portion shown in FIG. 3, showing a state where the serration portion is engaged.

FIG. 9 is a sectional view showing an internal structure of a connecting portion of a door closer according to a second embodiment of the present invention.

FIG. 10 is a bottom view of the connecting portion shown in FIG. 9;

FIG. 11 is an enlarged view of the internal structure of the connecting portion shown in FIG. 9, showing a state where the serration portion is separated.

FIG. 12 is an enlarged view of the internal structure of the connecting portion shown in FIG. 9, showing a state where the serration portion is engaged.

FIG. 13 is a longitudinal sectional view showing a stop device according to Embodiment 3 of the present invention, showing a state where a lock mechanism is unlocked.

FIG. 14 is a longitudinal sectional view showing a stop device according to Embodiment 3 of the present invention, showing a state where a lock mechanism is locked.

15A and 15B show a stop device according to Embodiment 4 of the present invention, wherein FIG. 15A is a longitudinal sectional view and FIG. 15B is a bottom view.

16A and 16B show a stop device according to Embodiment 5 of the present invention, wherein FIG. 16A is a longitudinal sectional view and FIG. 16B is a bottom view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Door 4 ... Bracket 5 ... Stop link 8 ... Pivot shaft 13 ... External insert 14a, 14b ... Horizontal serration part 21 ... Holding member 24 ... Cam 25 ... Operation lever 39a, 39b ... Vertical serration part

Claims (1)

[Claims] 1. A member which rotates relatively in conjunction with an opening and closing operation of a door, a pivot shaft which is a pivot between the two members fixed to the one member, and an axial direction with respect to the pivot shaft. An external insert movably and rotatably extrapolated, a serration portion interposed in an opposing portion between the external insert and the one member, and the external insert and the other member When the positional relationship is reached, a stopper mechanism for restricting the relative rotation of the two members further, a pressing member facing the outer insert body movably mounted in the axial direction with respect to the pivot shaft, and the pressing member A lock device that moves a member in the axial direction of the pivot shaft and selectively retains engagement and disengagement of the serration portion.
A stop device for a door closer, characterized in that the serration section is composed of both a horizontal serration section and a vertical serration section.