JPH0826725B2 - Door closer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a door shield having a concealed type / single arm structure, and more specifically, a structure in which a rail for guiding an arm end associated with a closer body is provided with a locking means for positioning. Regarding door closers.

[0002]

2. Description of the Related Art Generally, a door closer of this type is embedded in the upper edge of a door 1 as shown in FIG. 4 and has a door closing speed adjusting means, and a door closing speed adjusting means of the door closer main body 2. An arm 3 connected to the rotating element and a rail 4 fixed to the upper edge (not shown) of the doorway and guiding the tip of the arm 3 are the main components. In order to keep the door 1 open at a certain angle, the tip of the arm 3 is locked to the rail 4.

Specifically, as shown in FIGS. 5 and 6,
The tip end of the arm 3 is pivotally connected to an arm attachment body 5 slidably provided on the rail 4, and an engagement piece 6 projecting in the axial direction of the rail 4 is provided on the arm attachment body 5.
On the other hand, a stopper 8 having a locking piece 7 is fixed to any portion of the rail 4 by screwing. The locking piece 7 has a roller at its tip.

In the above structure, when the door 1 is opened, the arm 3 rotates in response to the opening of the door 1, the arm mounting body 5 at the tip of the arm 3 slides on the rail 4, and the engaging piece 6 engages with the locking piece 7 of the stopper 8. The door 1 is locked by and acts to keep the door 1 at a required opening angle. When the door 1 is closed, the engagement piece 6 and the engagement piece 7 are unlocked, and the door 1 is slowly closed by the door closing speed adjusting means of the door closer body 2.

[0005]

By the way, in general, the door 1
When opening, it is almost always attempting to open larger than the required opening angle. In the above configuration, in such a case, the arm attachment body 5 and the engagement piece 6 from the door 1 via the arm 3 collide with the stopper 8 with a large force to deform the locking piece 7 or the stopper 8. There was a problem of breaking the.

The present invention has been made in view of the above-mentioned conventional problems, and an object thereof is to provide a door closer in which the stopper and the locking piece are not deformed or damaged even when the door is opened widely.

[0007]

In order to achieve the above object, a door closer of the present invention comprises a door closer body attached to an upper edge of a door or a doorway, an arm pivotally connected to the door closer body, and a tip end of the arm. An arm mounting body that is connected and has an engaging piece; and a rail that slide-guides the arm mounting body and that is mounted on the upper edge of the doorway or the door.
Comprising a stopper provided on the rail, the stopper has a fixed base and a locking piece mounting base having a locking piece,
An elastic body is provided between the fixed base and the locking piece mounting base, and the elastic body has a first elastic body composed of a coil spring having both ends joined to the fixing base and the locking piece mounting base, and one end serving as the fixing base. The second elastic body is made of rubber and is joined to the locking piece mounting base so that the other end of the elastic body is located at a distance from the locking piece mounting base.

[0008]

In the above structure, when the door is opened, the arm rotates, the arm mount is guided by the rail and slides toward the locking piece, and the engaging piece of the arm mount engages the locking piece. Position, that is, hold the open position of the door. When the arm mounting base slides and the engaging piece collides with the locking piece and the arm mounting base violently collides with the locking piece mounting base, the locking piece mounting base retreats against the elastic body to prevent impact. Absorb and protect each component from impact.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Since the door and the door closer body attached to the door are the same as those of the above-mentioned conventional example, their drawings and description are omitted. Also, the drawings are shown upside down to facilitate understanding of the components.

As shown in the figure, the rail 9 attached to the upper edge of the doorway is formed in a U-shaped cross section, and has a projecting thread 9a and an inwardly bent piece 9b protruding inward at the middle abdomen of both side walls and the opening edge. ing. The arm mounting body 10 is an engaging piece 11 that doubles as a slider.
A rotation support shaft 12 provided upright on the engagement piece 11, a slider 13 rotatably provided on the rotation support shaft 12, and a rotation support shaft 12 rotatably provided below the slider 13. It is composed of an arm mounting plate 14. The engagement piece
An engaging recess 11a is formed inside the tip of the member 11. The engaging piece 11 and the slider 13 are made of a synthetic resin material having good slidability, and the engaging piece 11 is fitted in the upper groove 9c of the rail 9 which is supported by the protrusion 9a, and the slider 13 is fitted in the lower groove 9d. They are fitted together, and the arm mounting plate 14 is provided so as to be located below the inner folded piece 9b. Then, the tip of the arm 15 is screwed to the arm mounting plate 14.

The arm mounting body 10 on the rail 9
A stopper 16 is provided at a position corresponding to the interval. The stopper 16 has a fixed base 17 fixed so as to be positioned in the rail 9, an end rod fixed to the fixed base 17 and an axial rod 18 extending axially in a groove 9d below the rail 9, A locking piece mounting base 19 which is coupled to the tip of the shaft rod 18 and is located in a groove 9d below the rail 9, and a groove 9c above the rail 9 which is mounted on the upper surface of the locking piece mounting base 19. It consists of a locking piece 20 located inside. A roller 21 is rotatably provided at the tip of the locking piece 20.

The characteristic structure of this embodiment is a stopper.
This is because elastic bodies 22 and 23 are provided in 16. First elastic body 22
Is composed of a coil spring, surrounds the shaft rod 18, and both ends are in contact with the fixed base 17 and the locking piece mounting base 19. The second elastic body 23 is made of rubber and has a hole 24 at the center thereof, into which the first elastic body 22 made of a coil spring is inserted. It is arranged in the rail 9 and between the fixed base 17 and the locking piece mounting base 19, one end abuts on the fixed base 17, and the other end has a gap between the locking piece mounting base 19. In this embodiment, the locking piece mount 19 is divided into two pieces, and one piece is the locking piece 20.
Although the portion is covered, this locking piece mounting base 19 does not necessarily have to be divided.

In the above structure, the arm 15 rotates when the door is opened, and the arm mounting body 10 slides toward the stopper 16 in response to this. When the door is opened to a required angle, the engaging piece 11 of the arm mounting body 10 is a stopper.
The roller 21 of the locking piece 20 hits the locking piece 20 in 16 and goes over the tip of the engaging piece 11 to fit into the locking recess 11a.
Therefore, the rotation angle of the arm 15 is maintained and the door is maintained at the required opening angle.

When the door is opened, the arm mounting body 10 slides vigorously, the engaging piece 11 collides violently with the locking piece 20, and the slider 13 of the arm mounting body 10 also mounts the locking piece on the stopper 16. The table 19 collides violently.
In addition, when the door is opened, in most cases, a force acts to open the door beyond a required opening angle, and the impact of each member is considerably large. Here, in the stopper 16, the first elastic body 22 made of a coil spring absorbs the impact. That is, a large impact of the engagement piece 11 and the slider 13 is mitigated because the locking piece 20 and the locking piece mounting base 19 retreat against the elasticity of the first elastic body 22, and damage to each component member. Can be prevented. Further, the second elastic body 23 made of rubber can absorb the impact of the retracted locking piece mounting base 19 and prevent damage to each component.
As described above, in the door closer of this embodiment, the rail has the door opening / positioning means, and even if the door is forcibly opened, the shock is absorbed and the structural members can be prevented from being deformed or damaged.

In this embodiment, the elastic body is composed of two members, a coil spring and rubber, but it may be composed of only the coil spring. The door closer body may be attached to the door and the rail may be attached to the door.

[0016]

As is clear from the description of the above embodiment,
According to the present invention, in the rail having the door opening positioning means, since the elastic body is provided on the stopper side for receiving the slide of the arm mounting body having the engaging piece, the impact of the arm mounting body is absorbed and the component parts, that is, The locking piece and the locking piece mounting base can be prevented from being deformed or damaged, and a door closer with less failure can be provided.

[Brief description of drawings]

FIG. 1 is a plan view of a main part of a door closer according to an embodiment of the present invention.

FIG. 2 is a sectional view of a main part of the door closer.

FIG. 3 is a partially cutaway perspective view of a main part of the door closer.

FIG. 4 is an external perspective view of a door closer.

FIG. 5 is a sectional view of a main part of a conventional door closer.

FIG. 6 is a partially cutaway perspective view of the door closer.

[Explanation of symbols]

 9 rail 10 arm mounting body 11 engaging piece 13 slider 15 arm 16 stopper 17 fixing base 18 shaft rod 19 locking piece mounting base 20 locking piece 22 first elastic body 23 second elastic body

Claims (2)

[Claims] 1. A door closer main body attached to an upper edge of a door or a doorway, an arm pivotally connected to the door closer main body, an arm attachment body pivotally attached to a tip of the arm and having an engaging piece, and the arm attachment. It consists of a rail that slides and guides the body and is attached to the upper edge of the doorway or to the door, and a stopper provided on the rail. The stopper is fixed.
The base has a locking piece mounting base having a locking piece, and an elastic body is provided between the fixed base and the locking piece mounting base.
Coil spring with the ends joined to the fixed base and the locking piece mount
And a first elastic body made of
The rubber that is positioned so that there is a gap with respect to the locking piece mount.
A door closer made of a second elastic body . 2. The elastic body comprises a first elastic body composed of a coil spring having both ends joined to a fixed base and a locking piece mounting base, one end joined to a solid base, and the other end to the locking piece mounting base. 2. The door closer according to claim 1, comprising a second elastic body made of rubber and positioned so as to have a space.