JPH0949366A - Stopping device for door closer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To stop a closer at an optional opening angle of a door by assembling a ball valve in the oil feed path of a cylinder cap, rotating an operating shaft having an action piece at the inner end, and opening or closing the ball valve. SOLUTION: The opening end on the high-pressure side of a cylinder filled with the operating oil is closed by a cylinder cap 1, and a ball valve 18 is assembled in the oil feed path 6 of the cylinder cap 1. An operating shaft 9 made of a rod body nearly parallel with the center axis of the cylinder cap 1 is provided, and it is rotatably and liquid-tightly coupled with the cylinder cap 1. An action piece 14 driving the ball 15 of the ball valve 18 from a valve seat tube 13 is formed at the inner end of the operating shaft 9. When an external operating member 17 is operated to rotate the operating shaft 9, the ball valve 18 is opened or closed, and a closer can be stopped at an optional opening angle of a door during the operation of the closer.

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 (hereinafter simply referred to as a stop device), and more particularly to a stop device that can stop a door closer at an arbitrary opening angle of a door.

[0002]

2. Description of the Related Art As is well known, a door closer is a device that uses a so-called oil damper to close a door with a spring.

By the way, since the door with the door closer is always biased in the closing direction, the closing force of the door closer may be an obstacle when passing furniture or large luggage at the door.

For this reason, various stop devices have been proposed in which the opening angle of the door is temporarily maintained at a constant value and it is not necessary to press the door when a large load passes.

A typical example thereof is one in which a stop device is incorporated in a V-shaped link mechanism that connects a pinion of a door closer and a door or a door frame. For example, a click device is provided at a joint portion of the link mechanism, When a certain degree of open leg is reached, the click device works to keep the open degree of the link mechanism metastable.

Further, another stop device devises a mechanism for meshing the rack and the pinion in the cylinder of the door closer, and when the door is opened and the opening angle reaches a certain value, the mesh between the rack and the pinion is disengaged. Since the rack biased by the spring cannot rotate the pinion, the closing action of the door closer is stopped.

[0007]

However, in all of the conventional stopping devices, the opening angle of the door that can be held is large to some extent and is a constant value. Therefore, it is not possible to open the door slightly with the door chain hanging for ventilation, and the stop device will not operate unless the door is opened wide enough to allow a person to pass. , There are points to be improved.

It is an object of the present invention to provide a novel stop device which operates even at an arbitrary opening angle of a door and has a simple structure.

[0009]

In order to achieve the above object, the invention according to claim 1 is a cylinder cap for closing an open end on the high pressure side of a cylinder filled with hydraulic oil,
The ball valve built into the oil passage in this cylinder cap and the rod that is almost parallel to the center axis of the cylinder cap are rotatably and liquid-tightly fitted to the cylinder cap. And an operating shaft formed with an operating piece for removing the body from the valve seat.

The invention described in claim 2 is the same as claim 1.
In addition to the configuration of the invention described in (1), a piston ring is fitted on the high pressure side end of the piston.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In order to facilitate the description of the present invention, first, an example of the structure of the conventional cylinder cap shown in FIG. 6 will be briefly described.

In FIG. 6, reference numeral 1 indicates a cylinder cap, and the cylinder cap 1 has an opening on the high pressure side of a cylinder 19 (see FIG. 4) of a closer filled with hydraulic oil by a male screw portion 1a formed on the outer peripheral portion thereof. It is screwed so as to close the end.

A valve seat 2 and a filter 3 are mounted on the inner end surface of the cylinder cap 1 and are fixed by an orifice seat 4. In addition,
Depending on the type of closer, the valve seat 2 may not be used.

On the other hand, an adjusting valve 5 for adjusting the speed of the piston is screwed along the central axis of the cylinder cap,
The inner end of the slivers having a V-shaped cross section is fitted in the central hole of the valve seat 2.

In the conventional closer having the cylinder cap 1 constructed as described above, the hydraulic oil pressed by the piston 20 (see FIG. 4) to a high pressure is used for the orifice, which is not shown in order to clarify the drawing. It is introduced into the central hole of the valve seat 2 through the opening in the outer peripheral portion of the seat 4 and the filter 3.

When the hydraulic oil is introduced into the center hole 1b of the cylinder cap through the small hole formed by the above-mentioned V-shaped cross section of the regulating valve 5 and the outer surface of the valve seat 2, the hydraulic oil passes through the small hole. The viscous resistance of is used to buffer the piston.

The hydraulic oil introduced into the center hole 1b of the cylinder cap flows back to the low pressure side of the cylinder through an oil guide passage 6 that penetrates the cylinder cap 1 in the radial direction.

In FIG. 6, reference numeral 7 is an O-ring for sealing hydraulic oil, and reference numeral 8 is an engaging hole of a tool for screwing the cylinder cap 1 to the cylinder.

In the invention described in claim 1, as shown in FIGS. 1 to 3, a ball valve 18 is incorporated in the oil guide passage 6 of the cylinder cap 1 having the above-mentioned structure, and the ball valve 18 is operated by the operating shaft 9. It can be opened and closed.

The ball valve 18 is, as shown in FIG.
It has a bottomed tubular plug 10 formed by screwing a bottomed cup-shaped first member 11 and a tubular second member 12 having an O-ring 7 fitted to the outer periphery thereof.

The plug 10 is inserted into a bottomed plug hole (not numbered) formed so as to intersect the oil guide path 6 from the outer end surface of the cylinder cap 1.

Oil guide 6 of the first member 11 of the plug 10
An oil guide path 6 coaxial with the oil passage 6 is formed at a portion intersecting with the oil passage 6.

A valve seat cylinder 13 is inserted in the lower oil guiding passage in FIG. 1 so as to penetrate the cylinder cap 1 and the first member 11, and the first member 1 of the valve seat cylinder 13 is inserted.
The opening in 1 serves as the valve seat of the ball valve 18.

The valve seat cylinder 13 also has a function of preventing the plug 10 from coming off and a rotation of the plug 10.

When the valve seat cylinder 13 is inserted so as to penetrate the cylinder cap 1 and the first member 11, the valve seat cylinder 13 is inserted.
It is preferable that an appropriate adhesive is applied to the outer peripheral surface of the above, and after drying, this adhesive seals the outer periphery of the valve seat cylinder 13 in a liquid-tight manner.

In this way, even if the hydraulic oil leaks to the outside of the plug 10 on the inlet side of the ball valve 18, it does not leak to the low pressure side through the outside of the valve seat cylinder 13, so the ball valve 18 The closed state of can be kept stable.

Also, the first and second members 11, 1 of the plug
It is desirable that an adhesive agent is also applied to the second screwed portion so that the adhesive liquid-tightly seals the screwed portion after drying.

Inside the plug 10, O- is provided at two locations on the outer circumference.
The operating shaft 9 having the rings 7, 7 fitted therein is rotatably fitted.

As shown in FIGS. 1 to 3, the inner end portion of the operating shaft 9 inside the first member 11 is cut out to leave a crescent-shaped operating piece 14 having a narrow cross section, and the operating shaft 9 is cut off. A ball 15 serving as a valve body of the ball valve 18 is housed between the inner end surface, that is, the surface on which the operating piece 14 is formed and the bottom surface of the first member 11.

In FIG. 1, reference numeral 16 denotes a retaining ring such as an E-ring, and this retaining ring 16 is the first member 1.
It is fitted on the operation shaft 9 before the connection between the first member 1 and the second member 12 by screwing.

On the other hand, as shown in FIG. 1, a lever-shaped external operating member 17 is attached to the outer end portion of the operating shaft 9 projecting from the outer end surface of the cylinder cap 1 of the operating shaft. It is fixed.

It is to be noted that the ball valve 18 is assembled in the order in which the operating shaft 9 is fitted and the retaining ring 1 is attached to the operating shaft 9, although the description will be reversed.
The second member 12 fitted with 6 and the first member accommodating the ball 15 are screwed together to form a plug 10, and the plug 10 is inserted into the unnumbered plug hole of the cylinder cap 1, Oil guide 6 of cylinder cap 1 and first member 1
After aligning with that of No. 1, the valve seat cylinder 13 is inserted.

With the ball valve 18 installed in the oil passage 6 in the cylinder cap 1, the plug 1 of the operating shaft 9
The retaining ring 16 is responsible for retaining from 0, and the degree of entry of the operating shaft 9 into the plug 10 depends on the inner end of the operating piece 14 and the first member 1.
It is regulated by the contact with the inner bottom surface of 1.

The stop device according to the embodiment of the invention described in claim 1 having the above-mentioned structure is shown in FIG. 1 when the external operating member 17 is set upright with respect to the paper surface as shown by the solid line. As shown in FIG. 2, the operating piece 14 is placed at an angular position where it does not interfere with the ball 15.

Then, the released ball 15 is seated in the inner end opening of the valve seat cylinder 13 due to the difference in hydraulic pressure before and after the ball 18 valve, and the ball valve 18 is closed to stop the closer.

When the door is closed, as shown by the chain line in FIG. 1, the external operation member 17 is rotated so as to be lowered.

Then, in FIG. 2 and FIG. 3, the operating piece 14
Rotates counterclockwise so that the actuating piece 14 pushes the ball 15 in the lateral direction to dislodge it from the inner end opening of the valve seat cylinder 13 which is the valve seat, and as shown in FIG. The ball 15 separated from the seat is stably held.

At this time, since the ball valve 18 is in the open state, there is nothing that hinders the flow of the hydraulic oil in the ball valve, and the closer closes the door by its original function.

In order to allow interference with the ball 15 of the operating piece 14, a horizontal axis passing through the center of the ball seated on the valve seat and a central axis of the operating shaft 9 are vertically arranged. It is good to shift them.

However, in the stopping device according to the invention described in claim 1, it is impossible to completely prevent the leakage of the hydraulic oil to the low pressure side at the fitting portion between the piston and the cylinder. Therefore, the door is gradually closed during the operation of the stop device.

Since this is the same as the automatic release of the stop device, it is convenient for some purposes.

However, it is a little inconvenient for the purpose of stably opening the door for a long time. Therefore, the invention according to claim 2 enables the stop device to operate for a long time by fitting the piston ring to the piston and completely preventing the leakage of the hydraulic oil.

That is, as shown in FIG.
An annular groove 21 is formed on the outer circumference of the high pressure side end of 0, that is, the end opposite to the cylinder cap 1.
A piston ring 22 made of rubber is fitted in the first part.

The outer circumference of the piston ring 22 is covered with, for example, a Teflon sheet 22a or the like to improve the slip between the piston ring 22 and the inner peripheral surface of the cylinder 19.

When the piston ring 22 is fitted on the piston 20 as described above, the working oil on the high pressure side elastically deforms so as to press the piston ring 22 against the inner peripheral surface of the cylinder 19 during operation of the closer, resulting in working oil. Leakage is completely prevented.

Incidentally, the piston ring 22 is shown in FIG.
As shown in (A), the Teflon sheet 22a is superposed on the raw rubber sheet 22b with an adhesive and punched out into a predetermined shape. Then, as shown in FIG. 5 (B), it is put into a mold and vulcanized into a shallow cup shape. As shown in FIG. 5C, it is manufactured by punching out the central portion after molding.

In the description of the illustrated embodiment, in order to rotate the operating shaft 9, the lever-shaped external operating member 17 connected to the outer end of the operating shaft 9 is operated by fingers.

In this case, when an adult reaches out, the closer to the upper end of the inner surface of the door can usually be reached, so that the external operation member 17 can be operated, while the child cannot reach it. It is possible to prevent an accident such as operating the external operating member by a trick or the like to suddenly close the door and pinching fingers between the door and the door frame to get injured.

In addition to the above-described embodiment, if an electromagnetic actuator such as a rotary solenoid is mounted on the outer surface of the cylinder cap, and its output shaft is connected to the operation shaft 9, remote control of the stop device according to the present invention is possible. become.

[0050]

As is apparent from the above description, according to the present invention, a ball valve is incorporated in the oil guide passage in the cylinder cap, and the operation shaft having the outer end projected to the outer end surface of the cylinder cap is rotated. Since the ball valve can be opened / closed and the working oil in the oil guide passage can be circulated or blocked, the stopping device with a new and simple structure that can stop the closer at any opening angle of the door while the closer is operating Can be provided.

Since the closer can be stopped or made to function again simply by opening and closing the oil passage with the ball valve, there is no room for friction of the mechanical parts.
Various effects such as stable function can be expected for a long time are achieved.

[Brief description of drawings]

FIG. 1 is a sectional view of a stop device according to an embodiment of the present invention.

2 is a sectional view taken along line II-II of FIG. 1, showing a state in which the ball valve is closed and the closer is stopped.

FIG. 3 is a sectional view taken along the line III-III in FIG. 1, showing a state where the ball valve is open.

FIG. 4 is a vertical cross-sectional view of a closer incorporating a stop device according to an embodiment of the present invention.

FIG. 5 is a diagram for explaining an example of a method for manufacturing a piston ring.

FIG. 6 is a sectional view showing an example of a structure of a conventional cylinder cap of a closer.

[Explanation of symbols]

 1 Cylinder Cap 6 Oil Guide 9 Operation Shaft 10 Plug 11 First Member 12 Second Member 13 Valve Seat Cylinder 14 Working Piece 15 Ball 17 External Operation Member 18 Ball Valve 19 Cylinder 20 Piston 21 Groove 22 Piston Ring

Claims (2)

[Claims] 1. A cylinder cap that closes an open end on the high-pressure side of a cylinder filled with hydraulic oil, a ball valve incorporated in an oil guide passage in the cylinder cap, and a cylinder axis that is substantially parallel to the center axis of the cylinder cap. A stop device for a door closer, comprising a rod, which is pivotally and fluid-tightly fitted to a cylinder cap, and has an operation shaft having an operation piece formed at an inner end thereof for removing a valve body of a ball valve from a valve seat. 2. A cylinder cap for closing the high-pressure side open end of a cylinder filled with hydraulic oil, a ball valve incorporated in an oil passage in the cylinder cap, and a cylinder axis substantially parallel to the center axis of the cylinder cap. It has a rod, which is rotatably and liquid-tightly fitted to the cylinder cap, and has an operation shaft with an operating piece formed at its inner end to disengage the valve body of the ball valve from the valve seat, and at the end of the high pressure side of the piston. A door closer stop device that is fitted with a piston ring.