KR930010635B1 - Door closer - Google Patents

Abstract

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Description

Back Check and Closed Delay Device in Door Closer

1 is a cross-sectional view showing an embodiment of a back-link and closing door delay device in a door closer according to the present invention.

2 is a longitudinal cross-sectional view taken along line II-II of FIG.

Figure 3 is a cross-sectional view showing another embodiment of the device of the present invention.

4 is a plan view showing a state in which a door using a door closer equipped with the present invention is installed.

* Explanation of symbols for main parts of the drawings

1: casing 2: lid

3: rotating shaft 5, 6: pair of yarn

5a, 6a: high pressure chamber 5b, 5b: low pressure chamber

7: a pair of rotorcraft 10: communication path

14: adjusting screw for back shank 15: adjusting screw for delay action

17, 18: control valve 20: control spring

21, 23: toilet seat 22, 24: pair of variable passages

The present invention uses a polymer viscous fluid, other viscous fluid and a spring, and in order to automatically close the door by restoring force by the axial force of the spring, the braking force can be given to the door due to the resistance by the viscous fluid. Not only allows the door to close slowly, but also provides greater braking force to the door in the event of an overload due to wind pressure from strong winds or an artificial external force to open the door. The purpose of this operation is to allow the back shank operation to act so that the door does not open suddenly and breakage is caused.

As a conventional door closer, a piston is mounted in a hydraulic cylinder installed in a horizontal body case via a return spring, and a rack is mounted on one side wall of the piston, and correspondingly rotates with a pinion shaft on one side of the cylinder. It is known to fit pinions that are freely moistened.

However, even in the above-described door closers, the operating area of the delaid action is set to be closed slowly for those who want to pass by the back operating area and the wheelchair. When the door is opened or closed due to strong wind or the door is pushed hard in the opening or closing direction, the door is rapidly opened and closed, especially for the physically handicapped, wheelchair, elderly, children, etc. The wheelchair speed is set so that the closing speed is set quickly even when it is dangerous, or at that time, an unpleasant friction sound or damage is caused by the fusion of the rack and the pinion, or the load is not applied to the door by an external force. There was a problem such as being unable to cope with the traffic of people.

The present invention has been invented in view of the above problems of the conventional door closer, and in the range of the maximum opening angle in the closed position, when the load is not applied to the door and is applied in any case, By maintaining the braking force, the door is always slowed down and speeded up for those who pass by the wheelchair, and in the case of an external load applied to the opening direction, the spring is applied to the pressure caused by the viscous fluid and the control valve. By utilizing the relative relationship with the force of the brake, it is automatically adjusted to increase the braking force and when it returns to the normal load state, the braking force is immediately adjusted to the normal value, so that there is no excessive force on the component due to the overload during closing. The ideal door closer can be obtained by a simple configuration. The enemy.

In order to achieve the above object, the present invention divides a casing whose upper end is sealed into a pair of yarns by a rotating shaft axially stored in the center thereof, and a pair of protrusions protruding from the rotating shaft so that the two chambers are divided into a high pressure chamber and a low pressure chamber. In the door closer in which the rotor blade of the rotary body is filled and the viscous fluid is filled, and the rotary shaft is urged with a return spring in one forward direction, the high and low pressure chambers of the pair of threads are mutually The casing communicates with each other by a narrow passage, and each casing has two adjustment screws for the back shank and the deraid action in a wide communication path communicating one high pressure chamber and the other low pressure chamber in the pair of threads. In the case of adjusting screw for back shank, the adjusting edge is added to the adjusting spring in the opposite direction to the toilet seat. Each pair is combined to form a pair of variable passages between each toilet seat of the passage and each of the control valves, and each of the variable passages has a force relationship between the pressure of the viscous fluid flowing from the high pressure chamber and the adjustment spring force. It is to provide a back and door closing device in a door closer characterized in that the automatic narrow and wide open and close automatically adjusted by the response of the control valve and the response of the control valve by the pressure of the viscous fluid.

Since the opening force of the door is applied to the rotary shaft as one direction, the rotary shaft and the rotor blade integrated with the rotary shaft rotate in the same direction.

At this time, the viscous fluid in one high pressure chamber flows into the other high pressure chamber and the other low pressure chamber in communication with the high pressure chamber, and the viscous fluid of the other high pressure chamber flows into the adjusting screw side of the back shank in the casing. Then, it flows into one low pressure chamber to the adjustment screw side for a RAID action.

Further, at this time, the restoring force (closed force) is accumulated in the return spring by the rotation of the rotating shaft.

When the opening is made as usual, the pressure of the viscous fluid flowing into the communication path is maintained at the normal value in the other high-pressure chamber, and the pressure of the viscous fluid is smaller than the force of the adjustment spring, so that the balance between the pressure and the adjustment spring The control valve of the adjustment screw for the back shank does not swing while is maintained. Since the regulating valve for one of the deraid action screws is not spring-loaded, the valve is swept and changed by the pressure of the viscous fluid, and the passage is kept in an open state. Resistance due to viscous fluids (braking force) does not work.

However, if the door is suddenly opened with a strong force or if the door is overloaded due to external force due to strong pressure in the opening direction due to strong winds, the pressure of the viscous fluid in the high pressure chamber is increased and this is the communication path from the other high pressure chamber. It is introduced into and applied to the control valve.

Therefore, as the pressure of the viscous fluid applied to the control valve is greater than the force of the control spring, the control spring is compressed, whereby the control valve oscillates in the closed direction, thereby reducing the variable passage between the casing inner wall surface and again. As the pressure of the viscous fluid increases, the control valve closes the variable passage, and the flow rate decreases than usual in the viscous fluid of the passage, or it does not flow completely so that the braking force is increased and the door resists the external force. It can be used for shank and the opening speed is reduced to the extreme. When the overload condition is eliminated, the control valve doubles by the adjustment spring, and the passage becomes a normal size, thereby opening the normal state.

In the closing direction, the rotating shaft and the rotor blade are rotated in the opposite direction from the opening when the revolving force is accumulated by the return spring, so the chamber that was the low pressure chamber at the time of opening becomes the high pressure chamber. At the same time, the viscous fluid of the other high pressure chamber flows into the adjustment screw side for the delaid action in the communication path of the casing, and then flows to the one low pressure chamber from the adjustment screw side for the back shank.

Therefore, the pressure of the viscous fluid is applied to the control valve for the adjustment action for the delay action, and the control valve swings and the other variable path is abolished, and the viscous fluid does not flow through the variable path. Although only the passage communicating with the gas flows, the passage is formed to be considerably smaller than the communication passage of the casing, so that a resistance force is generated when the viscous fluid flows through the passage and this becomes a braking force.

That is, in the closing gate direction, the braking force is gently reached from the maximum opening angle due to the so-called delayed action effect of the large braking force applied over the entire zone.

In addition, by adjusting or loosening the adjustment screw for the back shank and the adjustment screw for the delay action, it is possible to reduce or increase the passage between the wall surface of the gasket and the control valve. It may be.

Best Mode for Carrying Out the Invention Embodiments of the present invention will be described below with reference to the drawings.

As shown in FIG. 2 and a cross-sectional view taken along the line II-II, the casing 1 having a user cylindrical shape is sealed in a liquid-tight state by a lid 2 secured by a fixing screw (not shown). At the same time, a seating seat 1a for mounting on a door not shown on one side of the outer periphery is integrally formed.

In addition, the casing 1 is provided with a shaft hole (not shown in the center of the bottom wall), the lower end of the cylindrical shaft is fitted by the interposition of the bearing not shown, the upper end is a lid ( In the shaftless hole which is not shown in 2), this is also carried in the liquid-tight state by the interposition of the bearing which is not shown, and is rotatably supported, whereby the rotating shaft 3 and the casing 1 are installed in the inner wall edge 1b. The pair of seals 5 and 6 in a substantially flat fan shape in the casing 1 are partitioned by two protrusions 4 and 4.

In the rotary shaft 3, in the illustrated embodiment, a pair of rotary blades 7 and 7 protruding radially symmetrically are integrally formed, and each of the rotary blades 7 and 7 is the pair of seals. In (5) and (6), they were inserted to rotate at a predetermined angle in the circumferential direction.

In addition, an upper passage 8 through which the pair of seals 5 and 6 communicates between the high pressure chambers 5a and 6a separated by the rotor blades 7 and 7 on the rotary shaft 3. And a lower passage (9) communicating between the low pressure chambers (5b) and (6b) penetrates in the radial direction, and is formed smaller than the communication passage (10), which will be described later, of the casing (1). The high pressure chambers 5a, 6a, low pressure chambers 5b, and 6b communicate with each other while the passage 9 in the lower part is communicated with the communication hole 12 at the shaft center of the rotary shaft 3. It is. Other means for obtaining such a communication state include a rotary shaft 3 and a pair of rotary blades 7 and 8 and an inner wall surface of the casing 1 and an inner wall surface of the protrusions 4 and 4, respectively. A gap passage not shown in the figure may be formed to be spaced apart. 11 in the figure shows a toilet seat.

Further, the casing 1 has a communication path 10 communicating with the low pressure chamber 5b of the one chamber 5 and the high pressure chamber 6a of the other chamber 6 at one side thereof. have.

The communication passage 10 is located at the proximal end of one of the protrusions 4 of the casing 1, and the upper passages 10a and 10a concave on the rear surface of the lid 2 corresponding to the left and right sides thereof. ) And the left and right longitudinal passages (10b), (10b) and the two longitudinal passages (10b), which are in communication with the inner ends of the upper passages (10a) and (10a), respectively, penetrating to the bottom of the side wall of the casing (1). 10b was formed by the bottom passage 10c which was rolled up so as to communicate at about the middle of them.

The lower end of each of the longitudinal passages 10b and 10b has screw holes 13 and 13, respectively, and the adjusting screw 14 for the back shank and the screw holes 13 and 13 respectively. The adjusting screw 15 for the delaid action is screwed so as to be able to move upward and downward in the second figure in a liquid-tight manner through the 0-rings 16 and 16, respectively.

The adjustment screw 14 for the back shank and the adjustment screw 15 for the deraid action have a small wall 14b, 15b which is coaxial with the male screw parts 14a, 15a and is directed upward. Each of the edges 14b and 15b protrudes into the upper passages 10a and 10a in a state of being inserted into the longitudinal passages 10b and 10b, and each of the edges 14b and 15b has a disc shape. The control sides 17 and 18 are sheathed so as to perturb in the vertical direction.

The wall 14b of the adjustment screw 14 for the back shank is inserted so that rotation and perturbation are allowed in the mounting hole 19, the upper end of which is concave on the rear surface of the lid 2, and the adjustment screw 14 The adjustment side 17 of the control spring 17 is located between the adjustment side 17 and the upper step portion 14c provided at the boundary between the side 14b and the male threaded portion 14a. It is upwardly biased by (20), and is usually moved upwards from the toilet seat 21 provided on the upper end of the longitudinal passage 10b by the spring 20, that is, the inner wall surface of the casing 1, namely the A variable passage 22 is formed between the toilet seat 21 and the control valve 17.

As the one side of the delayed door cushion control valve 18 is not biased by a spring, the pressure of the viscous fluid flowing through the communication path 10 is simply applied, so that it is perturbed upward or downward. The control valve 18 is prevented from leaving the space 15b by the withdrawal prevention 25 fixed to the tip of the space 15b, and in the state of sliding upward, the control valve 18 and the The variable passage 24 is formed between the toilet seat 23 provided at the upper end of the longitudinal passage 10b, and the passage 24 is opened and closed by perturbation in the up and down direction of the control valve 18.

That is, the both variable passages 22 and 24 communicate with the low pressure chamber 5b of the equation (5) and the high pressure chamber 6a of the other chamber 6 through the communication passage 10. In addition, the two-way path 22, 24, the communication path 10 is formed significantly larger than the pair of upper, lower communication paths (8), (9) described above.

Therefore, the variable passages 22 and 24 can be adjusted to be made larger or smaller while the respective adjustment screws 14 and 15 are seated or relaxed, and the upper and lower ones are adjusted, thereby adjusting the resistance by the viscous fluid. When the braking force is arbitrarily adjusted and the rotation shaft 3 is overloaded in the opening direction due to strong wind or the like at the time of opening, the viscosity in the high pressure chambers 5a and 6a of the pair of chambers 5 and 6 is increased. When the pressure of the flow increases and the fluid flows into the communication path 10 and the pressure applied to the control valve 17 of the adjustment screw 14 for the back shank is greater than the force of the control spring 20, the control spring (20) is compressed so that the control valve (17) descends as indicated by the solid line in FIG. 2, seats on the toilet seat (21), and the variable passage (22) is closed to increase the braking force due to the resistance of the viscous fluid. Is applied and there is no overload in the adjustment spring (20). Is raised to the control side 17, the variable passage 22 is opened automatically returns to the original state.

In addition, due to the closing force, the rotating shaft 3 is rotated in the closing direction, and the pressure of the viscous fluid in the pair of low pressure chambers 5b and 6b of the pairs of roads 5 and 6 increases. It flows into the communication path 10, and, by the pressure, the control valve 18 of the adjustment screw 15 for the delaid action descends like the two-dot chain line of FIG. 2, seats on the toilet seat 23, and thereby the variable path By abolishing (24), the braking force due to the resistance of the viscous fluid increases and the delaid action works. At this time, the adjustment side 17 of the adjustment screw 14 for the back shank rises as indicated by the dashed-dotted line shown in FIG. 2 by the adjustment spring 20.

In addition, the casing 1 has a return spring (not shown) embedded in one end of the casing 1 such as the casing 1 and the other end of the casing 1 by a rotating member such as the rotating shaft 3. As the rotating shaft 3 is rotated in the opening direction, restoring force (closed force) is accumulated in the return spring, and is closed by this restoring force.

3 shows another embodiment of the apparatus of the present invention. In this case, the communication path 10 which fluctuates between the low-pressure chamber 5b and the high-pressure chamber 6a of the pair of chambers 5 and 6 in the said casing has the both ends of the casing 1 at right and left sides. The low pressure chamber is formed by the horizontal holes 10d and 10d which are opened in the side wall and penetrate in a straight state, and are opened at the left and right both sides in the base of one of the protrusions 4 in the casing 1. (5b), the high pressure chamber 6a and the communication path 10 communicate with each other, and the adjustment screw 14 for the back shank is provided in the screw holes 13 and 13 provided at the left and right ends of the communication path 10. The adjusting screw 15 for the wade action is screwed together through the 0-rings 16 and 16, and moved axially.

Further, the toilet seats (21) and (23) of the control valves (17) and (18), which are externally perturbed in the respective seats (! 4b) and (15b) of the adjustment screws (14) and (15), respectively. Is formed in the central portion of the communication path 10 is formed on both left and right sides, the adjustment spring 20 for biasing the control side 17 of the adjustment screw 14 for the back shank in the opposite direction to the toilet seat 21 is It is arrange | positioned between the said control valve 17 and the spring receiver 26 installed in the substantially center part of the said communication path 10, and each said toilet seat 21, 23 and each control valve 17, 18 The above-described variable passages 22 and 24 are formed between the above and other components, and the other components are configured in the same manner as in the above embodiment.

In the door closer comprised in this way, as shown in FIG. 4, the casing 1 is fixed to the upper side of the hanging side of the door 27 with the fixing screw 1a not shown with the installation seat 1a, and the one-side casing is fixed. The other end of the arm 29 and one end of the adjust arm 30 which are fixed in one end by the step screw 28 to the protruding end (not shown) of the rotating shaft which protruded outward from the lid 2 of (1) The other end of the adjust arm 30 is rotatably attached to the mounting arm 32 with a stepped screw 33 or the like, and the mounting arm 32 is fixed to the door mounting frame. It is fixed to the door 27 by fixing it to the upper frame 34a of the 34 with a screw 35.

Since the present invention is constructed as described above, the closing edge of the adjustment screw is moved by the pressure of the viscous fluid at the same time as the opening of the closing door, and the reactivation is increased due to the closing stop of the passage. The door is always closed smoothly in the range of the maximum opening angle to the closing position even in case of overload due to external force, as well as in the normal state where no external force is applied by strong wind or closed by strong manpower. Therefore, there is no risk of sudden door contact, and in particular, it is possible to preserve the safety of people, the elderly, children, etc. by the handicapped wheelchair.

In addition, when an overload condition occurs due to external force being applied to the opening direction during opening, the pressure due to the viscous fluid increases, so that the pressure applied to the control valve of the adjusting screw for the back shank becomes larger than the force of the adjusting spring. The control valve moves by compressing the control spring, thereby reducing the passage between the toilet seat and the control valve, or closing the passage and increasing the braking force, thereby increasing the braking force. This can prevent the damage caused by the impact of the door and the wall, the damage to the mounting arm, the mounting bracket, and the like.

Furthermore, the operation of closing the passage in case of overload or closing the passage in case of overload and returning of the passage in case of overload is automatically and instantaneously performed by the relationship between the force of the adjustment spring and the pressure of the viscous fluid. Therefore, even if an overload occurs at any opening angle within the opening angle range, it can cope with it directly.

Claims (1)

The upper casing is enclosed in the casing by a rotary shaft axially retained in its center, and is divided into a pair of threads, and a pair of rotor blades protruding from the rotary shaft are formed to rotate to separate the high pressure chamber and the low pressure chamber. In a door closer in which a sieve is filled and the rotating shaft is arranged as a return spring in one rotational direction, the high and low pressure chambers of the pair of threads communicate with each other by narrow passages, and the casing has a back and Both adjusting screws for the blade action move each control valve in a wide communication path communicating with one of the high pressure chamber and the other low pressure chamber in the pair of threads, but in the adjusting screw for the back shank The sides are joined together by adding a spring to the opposite direction to the toilet seat, and the angular toilet seat and the angle adjustment of the communication path A pair of variable passages are formed between the two and the variable passages, and each of the variable passages is controlled by the pressure of the viscous fluid flowing from the high pressure chamber and the response of the control valve and the pressure of the viscous fluid. A back shank and closed ground device for a door closer, characterized in that it is automatically adjusted to open and close wide and open by side action.