JP2899665B2 - 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 closer.

[0002]

2. Description of the Related Art A door closer, also called a door check, is an arm-type hardware that automatically closes a door.

There are an exterior type and an interior type of the door closer, and FIGS. 3 and 4 show the interior type.

In the drawing, reference numeral 1 denotes a door body, and 2 denotes a door frame.
One end of the bending arm 3, which is pivotally mounted on the way so as to open according to the door 1 that opens and closes, is fixed to the door frame 2.

As shown in FIG. 4, a piston housing 6 for accommodating the helical spring 4 and the piston 5 in a linear arrangement is mounted on the door 1 side, and a gear 7 meshing with the piston 5 is mounted on the piston housing 6. The other end of the bending arm 3 was connected to the gear 7.

As described above, when the door 1 is opened, the bending arm 3 is opened, and the gear 7 on the piston housing 6 rotates. The gear 5 causes the piston 5 to move linearly in a direction to contract the spring 4 against the elasticity of the spring 4.

Then, the elasticity of the spring 4 is applied to the piston 5, and the piston 5 tries to return to the original state. Therefore, if the opening force of the door 1 is stopped, the gear 7 is rotated backward by the piston 5 and the bending arm 3 is closed. Then, a force is also applied to the door body 1 in the closing direction, and the door body 1 is automatically closed.

The gear 7 has teeth 7 as shown in FIG.
This is an intermittent gear partially provided with a, and the opening of the door 1 is a certain degree [for example, 160 ° or more as shown in FIG.
Then, the engagement with the piston 5 is lost, and the door 1 does not close.

[0009]

As described above, in the conventional door closers with a stop device mechanism, the stop device always operates at a preset angle. For this reason, if the door 1 is erroneously opened too wide by some measure, the door closer does not work.

It is an object of the present invention to provide a door closer which solves the inconvenience of the prior art described above, and which always has a function of always closing a door and which can operate a stop function only when necessary, such as when carrying in or cleaning a load. It is in.

[0011]

According to the present invention, a gear is meshed with the piston in a piston housing in which a spring and a piston which moves linearly against the spring are housed in a linear arrangement. The piston housing is attached to the door body, and one end of a bending arm that is pivotally mounted on the way so as to open according to the door body that opens and closes with respect to the door frame is fixed to the door frame side. In the interior type door closer having an end connected to the gear, a screw plug whose insertion depth is adjustable is provided in the piston housing, and one end of the spring is brought into contact with the screw plug to insert the screw plug into the depth. To adjust the locking position of the spring so that its elastic force can be adjusted, while trying to return by spring to the end of the piston housing opposite to the side where the screw plug is provided. A rod-shaped stopper that abuts on the piston to prevent the movement thereof is provided so as to be able to adjust the protrusion length in the movement direction of the piston, and a knob for adjusting the protrusion length of the stopper is provided outside the piston housing. Is what you do.

[0012]

According to the present invention, if the stopper is hardly protruded from the end in the piston housing, there is nothing to prevent the return of the piston by the spring, and the opened door is always closed.

On the other hand, if the stopper projects to the end in the piston housing, the stopper abuts on the piston to be returned by the spring and prevents its movement, so that the door remains open. Further, the timing of the opening and closing state of the door body for operating the stopper function can be determined by the length of the stopper projecting.

In addition, the protrusion length of the stopper can be easily adjusted by picking from outside the piston housing.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a perspective view showing one embodiment of a door closer according to the present invention, and FIG. 2 is a plan view of the same, in which the same components as those in FIGS. .

That is, in the figure, reference numeral 6 denotes a piston housing for accommodating the helical spring 4 and the piston 5 linearly side by side. The piston housing 6 is provided with a gear 7 which meshes with the piston 5; Reference numeral 6 denotes one end of a refracting arm which is attached to the door body and axially mounted so as to open in accordance with the door body which opens and closes with respect to the door frame. To be combined.

The gear 7 is not an intermittent gear partially provided with the teeth 7a, but may be an ordinary gear provided with the teeth 7a all around, unlike the conventional gear.

In the drawing, reference numeral 8 denotes a screw stopper with which one end of the spring 4 contacts. Although not shown, the end surface of the screw stopper 8 has a hexagonal turning hole, and a tool is engaged with the turning hole. By adjusting the insertion depth by rotating the whole, the locking position of the spring 4 can be determined and its elastic force can be adjusted.

Further, a rod-shaped stopper 9 for preventing the piston 5 from returning by the spring 4 is provided at an end of the piston housing 6 opposite to the end on which the screw plug 8 is provided. It was provided so that the protrusion length could be adjusted in the direction.

In the present embodiment, the stopper 9 is formed by a screw, and one end of the stopper 9 penetrates the side wall of the piston housing 6 and goes out of the piston housing 6, and a turning knob 10 is provided here.

By turning the knob 10 in this way, the length of the stopper 9 protruding can be adjusted. Then, the stopper 9 abuts against the end of the piston 5 to be returned by the spring 4 and prevents its movement, so that the door to be closed from that point remains open.

[0022]

As described above, in the door closer according to the present invention, an arbitrary opening / closing angle of the door body can be selected in order to operate the stopper function. The stop function can be activated only when necessary, such as at the time of cleaning.

[Brief description of the drawings]

FIG. 1 is a perspective view showing one embodiment of a door closer of the present invention.

FIG. 2 is a cross-sectional plan view showing one embodiment of the door closer of the present invention.

FIG. 3 is an explanatory diagram showing an outline of a door closer.

FIG. 4 is a cross-sectional plan view showing a conventional example.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Door body 2 ... Door frame 3 ... Refraction arm 4 ... Spring 5 ... Piston 6 ... Piston housing 7 ... Gear 7a ... Teeth 8 ... Screw plug 9 ... Stopper 10 ... Knob

Claims (1)

(57) [Claims] A gear is provided in a piston housing in which a spring and a piston which linearly moves in opposition to the spring are linearly arranged and housed so as to mesh with the piston, and the piston housing is attached to a door body and a door frame is provided. An interior door closer in which one end of a bending arm that is pivotally mounted on the way to be opened according to the door body that opens and closes is fixed to the door frame side, and the other end of the bending arm is connected to this gear. A screw plug whose insertion depth is adjustable is provided in the piston housing, and one end of the spring is brought into contact with the screw plug to adjust the insertion depth of the screw plug to determine the locking position of the spring and its elastic force. A rod-shaped slide is provided at the end of the piston housing opposite to the side provided with the screw plug to abut against the piston to be returned by a spring to prevent the piston from moving. A door closer, wherein a topper is provided so as to be able to adjust a protruding length in a moving direction of the piston, and a knob for adjusting a protruding length of the stopper is provided outside the piston housing.