JP2907812B1 - Door closing device - Google Patents

Abstract

Abstract: To set an inclination angle of a stop cam member by engaging an uneven engagement portion formed on an annular flat surface requires skill, and when the uneven engagement portion is rubbed, unevenness is uniformed and a nut member is formed. , The concave and convex engaging portions will not reliably engage with each other. SOLUTION: A second support shaft 5 is provided along an inner peripheral surface of a ring member.
7 has an outer tooth portion engraved in the axial direction of the second support shaft 57, and has an inner tooth portion formed on the sleeve 6 which can be fitted and removed along the axial direction of the second support shaft 57. When setting the opening angle of the door, that is, when setting the inclination angle of the stop cam member 66, the outer tooth portion and the inner tooth portion can be reliably and easily engaged with each other to set the opening angle of the door.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door closing device, and more particularly to a door closing device provided with an opening angle setting means for setting an opening angle of a door.

[0002]

2. Description of the Related Art Generally, a door closer is known as a device for automatically closing a door from an open state. And as an example of how to attach this door closer to the door,
There is a so-called parallel mounting that is mounted on the side opposite to the door opening.
FIG. 4 shows a plan view of this parallel mounting.

In FIG. 1, reference numeral 50 denotes a closer body which is attached to a door 51 which can be opened and closed around a support shaft 51a. The closer body 50 has a first end rotatably supported about a rotation shaft 52. An arm member 53 is provided. The first arm member 53 has an opening angle θ of the door 51.
An opening angle setting device 54 for setting 1 is provided.

Conventionally, the opening angle setting device 54 includes a second arm member 56 having one end attached to the other end of the first arm member 53 via a first support shaft 55, An attachment member (also referred to as a stay) 60 is connected to the other end via a bolt-shaped second support shaft (penetrated by an attachment member 60 described later) 57 and attached to the wall W by a screw 59. , The second arm member 56
And a restricting means 61 provided at a connection portion between the other end of the mounting member 60 and the mounting member 60.

As shown in FIGS. 8 and 9, the restricting means 61 has a protrusion 62 formed integrally with the mounting member 60, and the bottom surface of the protrusion 62 is formed in an annular plane. On this annular plane, a concave-convex engaging portion 63 is formed radially around the second support shaft 57. Also,
The restricting means 61 has a stop cam member 66 through which the second support shaft 57 is inserted below the protruding portion 62. The upper surface of the stop cam member 66 is formed in an annular plane. An uneven engaging portion 65 having a relative shape to be fitted to the engaging portion 63 is formed. Further, a stop groove 67 is formed in a protruding portion protruding to the side of the stop cam member 66, and a sphere 68 fitted in the stop groove 67 is held on the other end side of the second arm member 56, Arm member 5
6, a spring 69 for biasing the sphere 68 toward the other end is provided.

The second support shaft 57 is provided with the protrusion 6
2. A nut member 70 for fastening the stop cam member 66 and the second arm member 56 is screwed. When the nut member 70 is tightened, the concave and convex engaging portions 63 and 65 are engaged with each other, the stop cam member 66 is fixed to the projecting portion 62, and the second arm member 56 is rotatable around the second support shaft 57. When the door 51 is opened, the sphere 68 is pressed by the spring 69 and moves while being in contact with the peripheral surface of the stop cam member 66, and the sphere 68 fits into the stop groove 67 at a preset position. . Thus, the door 51 stops at the preset opening angle θ1.

That is, in FIG. 4, the opening angle θ1 of the door 51 is
Is set to 90 °. In this case, the sphere 68 is positioned at the position where the opening angle θ1 of the door 51 is 90 °.
9, the inclination angle θ2 of the stop cam member 66 is set in advance as shown in FIG.

In order to set the opening angle θ1 of the door 51, that is, to set the inclination angle θ2 of the stop cam member 66, the nut member 70 is loosened and the concave and convex engaging portions 63, 6 are set.
The door 51 (second arm member 56) is rotated around the second support shaft 57 to a required position in a state where the engagement between the five members 5 is released and the sphere 68 is fitted into the stop groove 67, and the inclination angle θ
Adjust 2. Thereafter, the nut member 70 is tightened so that the concave and convex engaging portions 63 and 65 are securely engaged with each other. When the door 51 is closed, the closing force overcomes the elasticity of the spring 69 and the sphere 68 comes off the stop groove 67 and moves while abutting on the peripheral surface of the stop cam member 66, and the door closer is closed by the operation of the door closer. I do.

[0009]

In the above-mentioned conventional opening angle setting device 54, since the concave and convex engaging portions 63 and 65 are each formed in an annular plane, the nut member 70 is loosened to incline the stop cam member 66. If the angle θ2 is set many times when rubbing is performed, the unevenness may become uniform, and even if the nut member 70 is tightened, the unevenness engaging portions 63 and 65 may not surely mesh with each other.

The inclination angle θ of the stop cam member 66
When the concave and convex engaging portions 63 and 65 are engaged with each other to set 2, the operation is difficult because the flat surfaces are engaged with each other, and the inclination angle θ of the stop cam member 66 is difficult.
The adjustment of 2 required skill.

Accordingly, an object of the present invention is to provide a door closing device that can solve the above-mentioned problems.

[0012]

According to the present invention, one end of a first arm member is rotatably mounted on a main body of a closing device via a main shaft, and the other end of the first arm member is attached to the other end of the first arm member. One end of a second arm member is rotatably connected via a first support shaft, and the other end of the second arm member has a second support shaft having a screw portion on a mounting member mounted on a wall side. A stop cam member for holding the opening angle when the door is opened by a predetermined angle is externally fitted to the second support shaft, and the second arm member is provided with a door. When is opened by a predetermined angle, the projection that fits into the fitting groove of the stop cam member is urged by a spring in the direction that fits into the fitting groove, so that the stop cam member fits with the second support shaft. Outer teeth portion engraved along the peripheral surface in the direction of the axis of the second support shaft A sleeve is provided which is externally fitted to the second support shaft and is internally fitted to the stop cam member. The sleeve is fitted around the outer periphery of the sleeve along the axial direction of the second support shaft. Between the fitting portion of the mounting member to the second support shaft and the fitting portion of the stop cam member, wherein the outer tooth portion and the inner tooth portion are the shaft center of the second support shaft. A spring is provided for urging the nut to be disengaged in the direction, and a nut member tightened to the screw in a direction in which the outer tooth portion and the inner tooth portion are fitted against each other against the elastic force of the spring is screwed. .

One end of a first arm member is rotatably attached to the closing device main body via a main shaft, and the other end of the first arm member is connected to a first support shaft having a threaded portion via a first support shaft. The other end of the second arm member is rotatably connected to the second arm member, and the other end of the second arm member is rotatably mounted on the wall side via a second support shaft. A stop cam member for holding the opening angle when the door is opened by a predetermined angle is fitted to the outside, and the second arm member is fitted into a fitting groove of the stop cam member when the door is opened by a predetermined angle. The mating projection is urged by a spring in the direction of fitting into the fitting groove, and along the inner peripheral surface of the fitting portion of the stop cam member with the first support shaft, in an annular and axial direction of the first support shaft. An outer tooth portion engraved toward the first camshaft is provided, and the outer tooth portion is externally fitted to the first support shaft and is attached to the stop cam member. A sleeve to be fitted is provided, and on the outer periphery of the sleeve, an inner tooth portion is provided on the outer tooth portion to be fitted and disengaged along the axial direction of the first support shaft, and is provided to the first support shaft of the first arm member. A spring for urging the outer teeth and the inner teeth to be displaced in the axial direction of the first support shaft is provided between the fitting part of the stop cam member and the fitting part of the stop cam member. A nut member fastened to the screw is screwed in a direction in which the outer tooth portion and the inner tooth portion are fitted against each other against the elastic force.

In each of the above configurations, when the nut member is loosened, the outer teeth and the inner teeth are displaced in the axial direction by the elastic force of the spring, and the projection is fitted in the fitting groove of the stop cam member. When the nut member is tightened and the outer tooth portion and the inner tooth portion are easily fitted along the axial direction, the opening angle of the door can be set.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. First, a first embodiment of the present invention will be described with reference to FIGS. Door closing device according to the first embodiment of the present invention (hereinafter referred to as “door closer”)
1 is used for parallel mounting in which the door 51 is mounted on the side opposite to the open side as shown in FIG.
To close automatically. Components having the same functions as those of the conventional example shown in FIGS. 4, 8 and 9 are denoted by the same reference numerals.

As shown in FIGS. 1 and 4, a door closer 1 according to a first embodiment of the present invention has a first arm member 53 attached to a closer body 50 attached to a door 51 via a vertical main shaft 52. Is rotatably attached to the first arm member 53, and the opening angle θ of the door 51 is
An opening angle setting device 54 for setting 1 is provided.

Next, the opening angle setting device 54 will be described. That is, one end of the second arm member 56 is rotatably connected to the other end of the first arm member 53 via the first support shaft 55 in the vertical direction, and the other end of the second arm member 56 is A flat mounting portion 56a is rotatably connected to a mounting member (also referred to as a "stay") 60 mounted on the wall W side via a second vertical support shaft 57 having a screw portion 57a. .

As shown in FIG. 1, a portion of the second support shaft 57 which is fitted to the mounting portion 56a is formed in a circular shape in a plan view with a circular diameter which is expanded with respect to the second support shaft body B having a rectangular column shape. The lower end portion of the second support shaft 57 is further enlarged in diameter and
7c is formed.

Further, as shown in FIG.
7, a stop cam member 66 for holding the opening angle θ1 when the door 51 is opened by a predetermined angle is externally fitted, and when the door 51 is opened by a predetermined angle to the second arm member 56, A sphere 68 (an example of a projection) that fits into the stop groove 67 of the stop cam member 66 is formed by a spring 69 (see FIG. 8) provided in the second arm member 56.
Are urged in the direction of fitting.

As shown in FIG. 2, a spacer groove 3 for fitting the spacer 2 is formed on the lower surface of the stop cam member 66. The spacer 2 is formed on the upper surface of the enlarged diameter portion 57b. And is held in the spacer groove 3.

As shown in FIG. 2, a ring member 4 is fixedly fitted on the inner peripheral surface of the stop cam member 66 at the fitting portion with the second support shaft 57. The outer teeth portion 5 is engraved along the peripheral surface (in a ring shape) toward the axis of the second support shaft 57.

As shown in FIG. 3, the second support shaft 5
7 and a stop cam member 6
6, an inner tooth portion 7 is formed at the lower portion of the outer periphery of the sleeve 6 so as to be able to be fitted to and removed from the outer tooth portion 5 along the axial direction of the second support shaft 57. The upper part of the sleeve 6 is slightly reduced in diameter so that the mounting member 60
Projecting upward from a fitting portion to the second support shaft 57, and the projecting portion is welded to the mounting member 60. At the center of the sleeve 6, a square hole 6a through which the second spindle main body B is inserted is formed.

A stop cam member 6 is provided between the fitting portion of the mounting member 60 and the fitting portion of the stop cam member 66.
A detaching spring 8 is provided for urging the inner spring 6 downward, that is, the outer teeth 5 are disengaged from the inner teeth 7 in the axial center direction (downward) of the second support shaft 57. A nut member 70 that is fastened to the screw portion 57a in a direction in which the outer tooth portion 5 and the inner tooth portion 7 are fitted against an elastic force.
Is screwed to the upper portion of the sleeve 6 via a disc spring 10 and a washer 9.

Reference numeral 15 in the drawing denotes a case of the detaching spring 8. A method of setting the opening angle θ1 of the door 51 in the above configuration, that is, the method of setting the inclination angle (rotatable angle) θ2 of the stop cam member 66 will be described.

First, by loosening the nut member 70, the stop cam member 66 is pushed downward along the second support shaft 57 by the elastic force of the removal spring 8, and
From the inner teeth 7. On the other hand, the sphere 68 remains fitted in the stop groove 67 by the elastic force of the spring 69. In this state, the door 51 is opened at a predetermined stop angle. That is, the second arm member 56 connected to the door 51 via the closer body 1 and the first arm member 53 is
1, the inclination angle θ2 of the stop cam member 66 is determined. Then, the nut member 70 is tightened against the elastic force of the removing spring 8. Then,
The enlarged diameter portion 57b of the second support shaft 57 rises, and accordingly, the spacer 2 and the stop cam member 66 are lifted, and the outer tooth portion 5 meshes with the inner tooth portion 7, so that the stop cam member 66 is fixed to the sleeve 6.

When the nut member 70 is tightened, the stop cam member 66 is smoothly lifted by the guide of the spacer 2 fitted to the quadrangular prism-shaped second spindle main body B.
Then, the nut member 70 is firmly tightened so that the stop cam member 66 does not rattle. Further, the tightened state of the nut member 70 can be maintained by the elasticity of the disc spring 10.

Further, the upper part of the sleeve 6 is
0, and the quadrangular prism-shaped second support body B is
Can be prevented from rotating together with the enlarged diameter portion 57b (second support shaft 57) when the nut member 70 is tightened.

The sleeve 6 and the mounting member 60 are more firmly fixed when the nut member 70 is tightened by the seat plate 57c formed at the lower end of the second support shaft 57.
When the inclination angle θ2 of the stop cam member 66 is set in this way and the door 51 is rotated in the closing direction, the sphere 6
8 comes off the stop groove 67 and slides in a state of contact with the peripheral surface of the stop cam member 66. When the door 51 is opened against the elastic force of the detaching spring 8, the sphere 68 slides in a state of contact with the peripheral surface of the stop cam member 66, and when the door 51 is opened by the opening angle θ1, the sphere is opened. 68 is a stop groove 67
And the door 51 is stopped.

As described above, the outer tooth portion 5 is provided along the inner peripheral surface of the ring member 4 and is directed toward the axis of the second support shaft 57. Since the inner teeth 7 that can be fitted and removed along the axial direction of the two support shafts 57 are formed on the sleeve 6, the opening angle θ1 of the door 51 is set, that is, the inclination angle θ2 of the stop cam member 66 is set. At this time, the outer teeth 5 and the inner teeth 7 are securely engaged with each other and do not rub each other. When the nut member 70 is tightened, the sleeve 6 moves along the axis of the second support shaft 57. It is possible to easily set the inclination angle θ2 of the stop cam member 66 by meshing the outer teeth 5 and the inner teeth 7 easily without the necessity.

Next, a second embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 7, the door closer 1 according to the second embodiment of the present invention is used for regular mounting in which the door 51 is mounted on the side where the door 51 is opened. One end of one arm member 53 is rotatably mounted, and one end of a second arm member 56 is connected to the other end of the first arm member 53 via a first support shaft 55 having a screw portion 55a. The other end of the second arm member 56 is rotatably attached to the wall W via a second support shaft 57.

A stop cam member 66 for holding the opening angle θ1 when the door 51 is opened by a predetermined angle is fitted on the first support shaft 55, and the second arm member 56
Further, when the door 51 is opened by a predetermined angle, the sphere 68 fitted in the stop groove 67 of the stop cam member 66 is urged by a spring 69 in the direction fitted in the stop groove 67.

Along the inner peripheral surface of the fitting portion of the stop cam member 66 with the first support shaft 55, an annular and first support shaft 5 is formed.
A ring member 4 provided with an outer tooth portion 5 engraved in the axial direction of the shaft 5 is provided, and a sleeve 6 fitted externally to the first support shaft 55 and internally fitted to a stop cam member 66 is provided. On the outer periphery of the sleeve 6, an inner tooth portion 7 is formed, which fits into and disengages from the outer tooth portion 5 along the axial direction of the first support shaft 55, and the first support shaft 55 of the first arm member 53 is formed. Spring for urging the outer tooth portion 5 and the inner tooth portion 7 to be displaced in the axial direction of the first support shaft 55 between the fitting portion of the first cam shaft 66 and the fitting portion of the stop cam member 66. A nut member 70 which is screwed to the screw portion 55a in a direction in which the outer tooth portion 5 and the inner tooth portion 7 are fitted against each other against the elastic force of the removing spring 8 is screwed. is there.

Further, an opening angle setting device 54 for setting the opening angle θ1 of the door 51 is provided, and the configuration of the opening angle setting device 54 is substantially inverted from the first embodiment. However, as described above, the sleeve 6
Is inserted into the first arm member 53, and the sleeve 6 is inserted with the first support shaft 55 having the seat plate 55 c and the enlarged diameter portion 55 b formed at the upper part and the screw part 55 a formed at the lower part.
Further, the difference is that the sleeve 6 and the first arm member 53 are not welded.

The detaching spring 8 urges the stop cam member 66 upward. When the nut member 70 is rotated, the spacer 2 and the second arm member 56 move up and down together with the stop cam member 66. I do.

As in the first embodiment, the outer tooth portion 5 is provided along the inner peripheral surface of the ring member 4 and in the axial direction of the first support shaft 55. The inner teeth 7 that can be fitted to and detached from the outer teeth 5 along the axial direction of the first support shaft 55 are formed on the sleeve 6, so that the door 51
The opening angle θ1 of the stop cam member 66
When the inclination angle θ2 is set, the outer teeth 5 and the inner teeth 7 are securely engaged with each other without rubbing, and when the nut member 70 is tightened, the sleeve 6 moves along the axis of the first support shaft 55. Therefore, the outer tooth portion 5 and the inner tooth portion 7 can be easily engaged with each other without any skill, and the inclination angle θ2 of the stop cam member 66 can be easily set.

[0036]

As is apparent from the above description, the present invention is provided by cutting the stop cam member along the inner peripheral surface of the fitting portion of the stop cam member with the second support shaft in the direction of the axis of the second support shaft. The outer teeth provided are provided, and are fitted to and removed from the outer teeth along the axis of the second support shaft on the outer periphery of the sleeve which is externally fitted to the second support shaft and internally fitted to the stop cam member. An inner tooth portion is provided, and the outer tooth portion and the inner tooth portion are fitted against an elastic force of a spring for urging the outer tooth portion and the inner tooth portion to be displaced in the axial direction of the second support shaft. By providing the nut member tightened in the mating direction, the outer tooth portion and the inner tooth portion are fitted and disengaged in the axial direction by the operation of the nut member, so that the opening angle of the door is set, that is, the stop cam member is set. When setting the angle of inclination, ensure that the outer teeth and inner teeth are engaged and rubbed Without also can easily are meshed with outer teeth and the inner teeth without requiring skill easily set the inclination angle of the stop cam member.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing a first embodiment of the present invention.

FIG. 2 is an enlarged sectional view of the stop cam member.

FIG. 3 is an enlarged perspective view of the sleeve.

FIG. 4 is a plan view showing the overall configuration.

FIG. 5 is a sectional view of an essential part showing a second embodiment of the present invention.

FIG. 6 is a side view showing the overall configuration.

FIG. 7 is a plan view showing the overall configuration.

FIG. 8 is a sectional view of a main part showing a conventional example.

FIG. 9 is a partially broken plan view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Door closer 4 Ring member 5 Outer tooth part 6 Sleeve 7 Inner tooth part 8 Removal spring 10 Disc spring 50 Closer main body 51 Door 53 First arm member 54 Opening angle setting device 55 First support shaft 56 Second arm member 57 Second Support shaft 60 Mounting member 66 Stop cam member 67 Stop groove 70 Nut member θ1 Door opening angle θ2 Stop cam member inclination angle

Claims (2)

(57) [Claims] 1. A door closing device for automatically closing an open door, wherein one end of a first arm member is rotatably attached to a main body of the closing device via a main shaft. One end of a second arm member is rotatably connected to the other end via a first support shaft, and the other end of the second arm member has a threaded portion on a mounting member mounted on a wall side. A stop cam member for holding the opening angle when the door is opened by a predetermined angle is externally fitted to the second support shaft, and the second arm is rotatably connected to the second arm. For members,
When the door is opened by a predetermined angle, the projection that fits into the fitting groove of the stop cam member is urged by a spring in the direction that fits into the fitting groove, and the stop cam member fits with the second support shaft. An outer toothed portion is provided along the inner peripheral surface of the annular shaft and is engraved in the axial direction of the second support shaft, and is externally fitted to the second support shaft and internally fitted to the stop cam member. Is provided on an outer periphery of the sleeve, and an inner tooth portion is provided on the outer tooth portion so as to be fitted to and disengaged from the outer tooth portion along an axial direction of the second support shaft. Between the fitting portion of the stop cam member, a spring for biasing the outer tooth portion and the inner tooth portion to be displaced in the axial direction of the second support shaft is provided,
A door closing device, wherein a nut member fastened to the screw is screwed in a direction in which the outer tooth portion and the inner tooth portion are fitted against the elastic force of the spring. 2. A door closing device for automatically closing an open door, wherein one end of a first arm member is rotatably mounted on a main body of the closing device via a main shaft. One end of a second arm member is rotatably connected to the other end via a first support shaft having a screw portion, and the other end of the second arm member has a second support shaft on the wall side. A stop cam member is attached to the first support shaft so as to be able to hold the opening angle when the door is opened by a predetermined angle, and the door is attached to the second arm member. When the stop cam member is opened by a predetermined angle, the protrusion that fits into the fitting groove of the stop cam member is urged by a spring in the direction that fits into the fitting groove, and the inner periphery of the stop cam member that fits with the first support shaft. An outer tooth portion is provided along the surface and is annular and engraved in the axial direction of the first support shaft. A sleeve is fitted on the shaft and fits inside the stop cam member. On the outer periphery of the sleeve, an inner tooth portion is provided on the outer tooth portion along the axial direction of the first support shaft. Between the fitting portion of the first arm member to the first support shaft and the fitting portion of the stop cam member,
A spring is provided for urging the outer tooth portion and the inner tooth portion to be displaced in the axial direction of the first support shaft, and the outer tooth portion and the inner tooth portion are fitted against the elastic force of the spring. A nut member fastened to the screw in a direction in which the nut member is screwed.