JPH10220102A - Free stop mechanism of door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop a door at a desired angle by inserting a roller to a roller groove as a free stop mechanism of a door closer equipped with door self-closing means and a damper mechanism. SOLUTION: A door closer is installed to gate post fittings fixed to the gate post with the fixed shaft upright in such a manner that post installation can be performed, and the closer is attached to the gate door by screwing with a vane W. Also, it is equipped with a self-closing mechanism using a hydraulic damper mechanism and a coil spring. If the gate door is pushed and widened from the closed state, a roller 51 is fixed together with the fixed shaft of the gate post and is not rotatable, only one end side of a coil spring C is twisted by the rotation of a roller receiving seat 54 in one united body with the gate door H, and an elastic force F increases. If the gate door H is further pushed and opened, an outer roller groove 54A of the roller receiving seat 54 reaches the position facing an inner roller groove 51A, and the roller 52 is fitted in the outer roller groove 54A, and the roller receiving seat 54 and a roller holder 53 are rotated together in one united body. No elastic force F is acted anymore to the gate door H and thus a no-load state occurs.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a closer which is attached to a rotating (opening / closing) door and automatically closes the door, and in particular, a free stop mechanism of the closer which can stop the door from a desired opening / closing position. It is about.

[0002]

2. Description of the Related Art For example, a door (openable / closable) used indoors or a gate used outdoors is provided with a coil spring or the like for automatically closing the doors or gates (hereinafter collectively referred to as doors). A closer equipped with a used self-closing mechanism and a damper mechanism using hydraulic pressure or the like to brake and absorb a closing force at the time of the self-closing operation has been developed and used.

In such a closer, when the door is opened with a hand or the like, the door automatically starts closing immediately after releasing the hand, so that the carrying of luggage, the elderly, the sick, the person in a wheelchair, etc. Has come to inconvenience.

Therefore, a stop mechanism capable of temporarily stopping the opening and closing operation of the door has been developed. As such a stop mechanism, for example, a clutch or a ball plunger or the like is used and the force (torque) required for operating the clutch or the ball plunger is stopped by making the force (torque) larger than the winding torque of the coil spring. It has been known.

[0005]

However, in such a stop mechanism, a stop action occurs only when a specific opening / closing angle is reached, so that the stop mechanism cannot be stopped at a desired opening angle. Has occurred. In addition, such a stop mechanism has a problem in durability because the stop force is reduced due to wear of parts.

In view of the above circumstances, an object of the present invention is to provide a free stop mechanism for a closer which can stop a door from a desired opening and closing angle and has high durability.

[0007]

According to a first aspect of the present invention, there is provided a closer having a self-closing means for automatically closing a door and a damper mechanism for braking the self-closing operation of the door.
A free stop mechanism is provided in which the roller is fitted into the roller groove to stop the opening and closing operation of the door from an arbitrary position.

According to a second aspect of the present invention, there is provided a roller shaft, wherein the free stop mechanism according to the first aspect is fixed to a rotation shaft of a door and has a roller groove on an outer peripheral surface; A roller holder rotatably arranged on the outer peripheral surface of the roller shaft and having a through hole in which the roller is inserted in a radial direction, and an outer periphery of the roller holder. The roller is disposed so as to be freely rotatable on the surface, is provided with a roller groove on the inner peripheral surface into which the roller enters, and has a blade seat and a roller seat integrally attached thereto.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described in detail with reference to the accompanying drawings. 1 and 2 show a free stop mechanism S provided in a gate closer according to an embodiment of the present invention.

The closer to which the free stop mechanism S of this embodiment is applied is mounted on a fixed shaft 12 fixed in an upright state to a portal post fitting 11 fixed to the portal column 1 so as to be retrofittable. It is screwed and attached with W. This door closer is provided with a hydraulic damper mechanism 3 and a self-closing mechanism 4 using a coil spring C, similarly to the conventional one.

The free stop mechanism S includes a roller shaft 51.
, Roller 52, roller holder 53, roller seat 5
4 is provided.

The roller shaft 51 is formed in a substantially cylindrical shape and has a groove formed on the shaft 21 on the inner peripheral surface side (see FIG. 3).
And is mounted so as to be immovable in the rotational direction with respect to the shaft 21 of the gate. Further, an inner roller groove 51A is formed on the outer peripheral surface of the roller shaft 51 of this embodiment, which is 180 degrees apart.

The roller 52 has a substantially columnar shape, and normally has an inner roller groove 51 of the roller shaft 51 when the door is closed.
A is inserted into A about 1/3 (although the present invention is not particularly limited to this ratio), and the rest (about 2/3) is inserted into the through hole 53A of the roller holder 53. The shape of the roller may be spherical, as long as it is easy to roll.

The roller holder 53 is, as shown in FIG.
It is formed in a substantially hollow cylindrical shape, and is rotatably disposed on the outer peripheral surface of the roller shaft 51. The roller holder 53 is provided with two through holes 53A into which the rollers 52 are inserted, while maintaining a 180-degree angle in the radial direction. The roller retainer 53 has a concave locking portion 53 for locking and fixing the lower end of the coil spring C.
B is also formed.

The roller holder 54 is provided with the roller holder 53.
The outer roller 54 is rotatably disposed on the outer peripheral surface, and two outer roller grooves 54A into which the roller enters into the inner peripheral surface are provided at two positions 180 degrees apart, and are press-fitted into the housing H to which the blades are attached. . The outer roller groove 54A
When the door is closed, the relative position of the roller shaft 51 to the inner roller groove 51A is previously set to a predetermined angle α (about 80
(Degree), and the free stop function is generated when the door is opened by this angle α.

Next, the operation of the free stop mechanism of this embodiment will be described. The gate in the closed state shown in FIG. 3 is fixed and held by a door stop or the like.

When the gate, which is in the closed state shown in FIG. 3, is first pushed out by hand, the roller shaft 51 is fixed integrally with the fixed shaft 12 on the side of the gate post 1 and is in a rotation immobile state.
As shown in FIG. 5, only one end (roller seat 54 side) of the coil spring C is moved by the rotation (for example, opening about 45 degrees) of the roller seat 54 integral with the gate (housing H) and the screw is rotated. As a result, the elastic force F increases.

Therefore, when the user releases his hand from this state, the roller closing seat 54 and the gate are returned in the closing direction by the elastic force F of the coil spring C of the self-closing mechanism 4, while the damper mechanism 3 is closed. Thus, the door closing operation is braked.

When the gate is further pushed open from the state of FIG. 5, the roller seat 54 is also opened together with the gate, but when the gate is opened at approximately 80 degrees (in the present invention, the angle is not particularly limited to this angle). The inner roller groove 51 into which the outer roller groove 54A of the roller seat 54 just fits the roller 52
It reaches the position facing A. Here, the roller holder 53
, One end of the coil spring C is fixed.
An elastic force is acting (a force f (see FIG. 6) for rotating clockwise is generated). As shown in FIG. 6, the roller 52 is pushed rightward by the reaction force R of the roller shaft 51 and can be fitted into the outer roller groove 54 </ b> A of the roller seat 54.

As a result, the roller 52 is inserted between the roller seat 54 and the roller holder 53, and as shown in FIG. 7, these roller seats 54 and the roller holder 53 are integrated into a roller shaft. Rotate around 51. In addition, since the elastic force C acting between the roller receiving seat 54 and the roller holder 53 is kept constant, no elastic force acts on the gate, and no load is applied, that is, The free stop state is realized.

[0021]

As described above, according to the present invention, a free stop mechanism is provided for stopping the opening and closing operation of the door from an arbitrary position by inserting the roller into the roller groove. In other words, the clutch or the clutch is provided. Since it is not necessary to use a mechanism such as a ball plunger, even when used repeatedly over a long period of time, the device can operate reliably and the durability can be improved.

Further, according to the present invention, various free stop functions are provided which enable the stop mechanism to operate continuously from a position beyond a predetermined opening angle, instead of operating the stop mechanism only at a specific position. It can be added to a type closer.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a door closer and the like having a free stop mechanism according to the present invention.

FIG. 2 is an enlarged sectional view showing a free stop mechanism in the door closer.

FIG. 3 is a cross-sectional view showing a free stop mechanism.

FIG. 4 is a schematic perspective view showing a roller retainer according to a free stop mechanism.

FIG. 5 is an explanatory view showing the operation of the present invention.

FIG. 6 is an enlarged view of a main part showing a roller inserted between a roller shaft and a roller seat.

FIG. 7 is an explanatory view showing the operation of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gate post 2 Sliding door 21 Rotating shaft 3 Damper mechanism 4 Self-closing mechanism 51 Roller shaft 51A Inner roller groove 52 Roller 53 Roller holder 53A Through hole 54 Roller seat 54A Outer roller groove S Free stop mechanism

Claims (2)

[Claims] 1. A closer equipped with a self-closing means for automatically closing a door such as a door or a gate, and a damper mechanism for braking the self-closing operation of the door, wherein a roller is inserted into a roller groove and the door is automatically closed. A free stop mechanism for a closer, comprising a free stop mechanism for stopping the closing operation from an arbitrary position. 2. The free stop mechanism includes: a roller shaft fixed to a rotation shaft of a door, having a roller groove on an outer peripheral surface; a pair of rollers engaging with the roller groove of the roller shaft; A roller retainer that is rotatably disposed on the surface and has a through hole into which the roller is inserted in a radial direction; and a roller retainer that is rotatably disposed on an outer peripheral surface of the roller retainer and has an inner peripheral surface. The free-stop mechanism of a closer according to claim 1, further comprising a roller groove provided with the roller, and a roller seat integrally attached to the blade side.