KR100607884B1 - A damping apparatus for door open and close - Google Patents

Abstract

According to the present invention, the closing operation of the door is made smoothly by opening the plunger at a low speed, and the opening operation is quick, and the configuration of the plunger head and the check valve is simplified, thereby improving productivity and reducing the manufacturing cost. It relates to a damping device for opening and closing.

The present invention for realizing this is provided with a cylinder in which the head of the plunger is accommodated, a flow path is formed in the head disposed in the cylinder, and a check valve for damping during the door closing operation is installed, and the door is disposed at the end of the rod disposed outside the cylinder. The plunger is provided with a pressing portion pressed to the guide, which is fixed in the cylinder and guides the entry and exit of the plunger, the packing provided in the inlet of the inner space of the cylinder and the pressing member for applying elasticity to the plunger in the advancing direction In the door opening and closing damping device, the plunger head is formed with a concave portion whose outer periphery is close to the inner wall of the cylinder and is formed concave inside and the outer side of the concave portion, the radius is formed smaller than the outer periphery of the concave portion cylinder The concave is formed by a neck portion forming a wide space between the inner wall and A plurality of passages are formed radially from the bottom of the needle portion to the outside of the neck portion, the check valve coupled to the inside of the concave receiving portion to open the flow path in one direction, and fixed to the plunger head and the movement of the check valve It characterized in that it comprises a limiting stopper.

Description

Damping device for door opening and closing {A DAMPING APPARATUS FOR DOOR OPEN AND CLOSE}

1 is a cross-sectional view showing the configuration of the prior application technology by the applicant

Figure 2 is an exploded perspective view showing the configuration of an embodiment according to the present invention

Figure 3a is a cross-sectional view of the combined state of FIG.

3B is a plunger entry progress state diagram of FIG. 3A (door closing direction).

FIG. 3C is a plunger entrance progress state diagram of FIG. 3A (door opening direction)

Figure 4 is a cross-sectional view showing the configuration of another embodiment according to the present invention

5 is an installation state diagram of the present invention

* Explanation of symbols for the main parts of the drawings

1: damping device for opening and closing the door of the present invention

10: cylinder 13: stopper stage 20: stopper

21: Nut 23: Cap type stopper 30: Plunger

31: head 31a: flow path 31b: recessed portion

31c: neck portion 31d: shaft 31e: concave groove

40: check valve 41: dish type check valve 43: washer type check valve

50: guide 55: oil absorbing material 60: packing

61: packing support 63: packing support stator 70: heating member

The present invention relates to an opening and closing damping device of the door, and in particular, the closing operation of the door is made smoothly by opening the plunger entry operation at a low speed, and the opening operation is made quickly, and the configuration of the plunger head and the check valve is made simple. It relates to a damping device for opening and closing the door to improve the quality and reduce the manufacturing cost.

Generally, a door of a furniture such as a window or a sink is equipped with a damping device for preventing shock and noise by smoothly closing the door.

This damping device is configured to receive the resistance of the fluid filled in the cylinder while the plunger is generally operated by the elasticity of the pressing member for braking and deceleration, and the prior art has a feeling that the operation of opening and closing the door at the same speed There was a falling issue.

As an alternative to the problems of the prior art, the applicant has previously applied for a 'damping device for opening and closing the door' as the application number 10-2005-0012560.

As shown in FIG. 1, the patent application No. 10-2005-0012560 filed by the present applicant, 'the damping device for the door opening and closing' 100, has an interior in which the head 131 of the plunger 130 is accommodated. A flow path 131a is formed in the cylinder 110 filled with the fluid and the head 131 disposed in the cylinder 110, and a check valve 140 is installed to damp the door closing operation.

The patent application No. 10-2005-0012560 'Door opening damping device' (100) is operated in the direction that the check valve blocks the flow path (131a) of the head 131 when the plunger 130 enters the cylinder door The damping movement of the closing direction of the movement is made, and the opening operation of the door is made quickly.

However, the prior art has a problem in terms of productivity due to the structure of the head and the check valve of the plunger.

The present invention has been made to solve the above problems,

The object of the present invention is to advance the operation of the plunger at a low speed so that the closing operation of the door is made smoothly and the opening operation is made quickly, and the configuration of the plunger head and the check valve is simplified, thereby improving productivity and reducing the manufacturing cost. To provide a damping device for opening and closing the door.

The door opening and closing damping device according to the present invention for achieving the above object,

The cylinder is filled with the fluid inside the head of the plunger, the flow path is formed in the head disposed in the cylinder and a check valve for damping during the door closing operation is installed, the end of the rod disposed outside the cylinder in the door A door comprising a plunger having a pressing portion to be pressurized, a guide fixed to the inside of the cylinder and guiding the entry and exit of the plunger, a packing provided at an inlet of the cylinder inner space, and a pressing member for applying elasticity to the plunger in an advancing direction. In the opening and closing damping device,

The plunger head has an outer circumference adjacent to the inner wall of the cylinder and is formed into a recessed portion and the recessed portion outside the inner concave portion, the radius is formed smaller than the outer circumferential edge of the recess portion, a large space between the cylinder inner wall Is formed of a neck portion to form a plurality of passages communicating from the bottom of the recess portion to the outside of the neck portion is formed radially,

A check valve coupled to the inside of the recess to open the passage in one direction;

And a stopper fixed to the plunger head to limit movement of the check valve.

Hereinafter, an embodiment of a damping device for opening and closing the door of the present invention will be described in more detail with reference to the accompanying drawings.

Figure 2 is an exploded perspective view showing the configuration of an embodiment according to the present invention, Figure 3a is a cross-sectional view of the coupling state of Figure 2, 3b is a plunger entry progress state diagram (door closing direction) of Figure 3a, Figure 3c is a plunger advance of Figure 3a Progress state diagram (door opening direction). As shown in Figure 2 to 3c, the damping device 1 for opening and closing the door according to an embodiment of the present invention is a cylinder 10, the cylinder (10) in which the fluid is filled in the head of the plunger 30 is accommodated 10, a flow path 31a is formed in the head 31 disposed within the check valve 40, and a check valve 40 for damping is installed at the door closing operation, and a pressure is applied to the door at an end of the rod 35 disposed outside the cylinder. Plunger 30 is provided with a pressing portion 37, the guide 50 is fixed to the inside of the cylinder 10 and guides the entry and exit of the plunger 30, the packing provided at the inlet of the cylinder inner space 11 ( In the door opening and closing damping device comprising a 60) and the pressing member 70 for applying elasticity to the plunger 30 in the advancing direction, the plunger head 31 has an outer periphery close to the inner wall of the cylinder and the inside Recessed portion 31b and recessed portion 31b to which recesses are formed. It is formed of a neck portion 31c which is formed outward and has a radius smaller than the outer periphery of the recess, and forms a large space between the inner wall of the cylinder, and is outside the neck portion 31c from the bottom of the recess 31b. A plurality of passages 31a are formed radially, and coupled to the inside of the recess 31b to check valves 40 for opening the passage 31a in one direction, and to the plunger head 31. It is configured to include a stopper 20 is fixed and limits the movement of the check valve (40).

Here, the plunger head 31 is formed with a shaft rod 31d protrudes into the recessed portion 31b, and the check valve 40 is capable of lifting up and down the shaft rod 31d and inside the recessed portion 31b. The stopper 20 is formed of a nut 21 coupled to an end portion of the shaft rod 31d to prevent the plate type check valve 41 from being separated. This is preferred.

In addition, the pressing member 70 is installed between the bottom 12 of the cylinder 10 and the plunger head 31.

In addition, the cylinder 10 has a stopper end 13 for protruding one or more steps to limit the entry of the plunger 30 to the rear of the inner circumferential surface, and the inner diameter is sequentially expanded for the coupling of the guide 50 to the inner circumferential surface. The first step 15 and the second step 17 are formed at predetermined intervals from the inside, and the guide 50 is formed with a rod passage 51 of the plunger and the first step 15 at the inner end. A first flange 52 corresponding to the first flange 52 is formed, and a second flange 53 corresponding to the second step 17 is formed at an outer end thereof, and the first flange 52 and the second flange 53 are formed. It is preferable that oil absorption material 55 made of a porous material is provided in the interspace.

In addition, the packing 60 is installed in front of the guide 50, the packing support 61 for supporting the packing 60 and the stator 63 for fixing the packing support 61 to the cylinder is provided do.

On the other hand, it is preferable that an arcuate recessed portion 37a is formed at the inner end of the pressing portion 37 of the plunger which is moved inside the cylinder 10.

It looks at the operating state of the door opening and closing damping device 1 according to the present invention having such a configuration.

The plunger 30 which is pressurized to be moved in the advancing direction by the pressing member 70 is in a state where the plunger 30 protrudes to the outside in the pressing member free state, that is, in the door open state, When a pressure is applied through the pressing portion 37 of the rod, the plunger 30 is pushed into the cylinder while receiving the resistance of the pressing member and the fluid.

At this time, the check valve 40 fitted to the shaft rod 31d of the plunger head 31 is pressed against the bottom of the soil support part 31b of the head by the pressure of the fluid to block the flow path 31a and the plunger 30 Inlet movement, that is, movement in the closing direction of the door is suppressed (see FIG. 3B).

Subsequently, pressure by the door is applied to the plunger 30, and the fluid is moved using the micro clearance S formed between the outer circumferential surface of the plunger head 31 and the inner wall of the cylinder 10. Damping movement takes place.

In this low-speed entry operation of the plunger 30, the recess 31b is formed in the head 31 of the plunger which is subjected to the resistance of the fluid, and the check valve 40 is formed as the dish type 41, so that the resistance area of the fluid is increased. Significantly increases and further amplifies the damping effect.

Here, an arcuate recess 37a is formed at the inner end of the pressing portion 37 of the plunger to further reduce the entry speed of the plunger 30.

In addition, a porous material oil absorption material 55 such as a sponge is provided between the guide 50 and the inner wall of the cylinder to absorb bubbles generated when the plunger 30 moves in and out, thereby making the plunger moving out quietly.

When the pressure applied to the plunger pressing portion 37 is released during the opening operation of the door, the plunger 30 is advanced by the repulsive force of the pressing member 70. At this time, the check valve 40 is hydraulically introduced through the flow path. By this, the flow path 31a pushed backward and closed is opened.

Therefore, the advancement operation of the plunger 30 proceeds at a low speed until the check valve 40 is opened, and is quickly performed after the check valve is opened to assist the door opening operation (see FIG. 3C).

Figure 4 is a cross-sectional view showing the configuration of another embodiment according to the present invention.

As shown in Figure 4, according to another embodiment of the present invention, the door opening and closing damping device (1A) of the plunger head 31 is a concave groove through the flow path (31a) to the bottom of the recess 31b ( 31e) is formed in a concentric shape, the check valve 40 is formed of a washer-type check valve 43 for opening and closing the inlet of the concave groove (31e), the stopper 20 is part of the outer edge of the The cap type stopper 23 is coupled to the plunger head 31 to form a movement allowance space of the washer type check valve 43 and the flow path hole 23a is formed at the center thereof.

Here, the cap type stopper 23 may be formed with a flange (23b) for supporting the pressing member 70, may be coupled to the plunger head 31 by interference fit.

In the present invention 1A having such a configuration, the check valve 40 is a washer type 43, the center hole 43a is formed, and the stopper has a cap type stopper 23 having an inner space and a flow path hole 23a. By the configuration of the door opening operation to increase the fluid pressure in the internal pressure to push the plunger 30 is amplified (see Fig. 4b), the door opening operation is made easier.

The present invention can be variously substituted, modified and changed within the scope without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains, which is not limited to the above-described embodiments and drawings no.

As described in detail above, the door opening and closing damping device according to the present invention advances the operation of the plunger at a low speed so that the closing operation of the door is made smoothly and the opening operation is made quickly, and the configuration of the plunger head and the check valve is made. It is simple to improve productivity and significantly reduce manufacturing costs.

Claims (8)

A cylinder 10 in which fluid is filled in the head of the plunger 30, a flow path 31a is formed in the head 31 disposed in the cylinder 10, and a check is performed for damping during the door closing operation. The plunger 30 is provided with a pressing part 37 pressed against the door at the end of the rod 35 in which the valve 40 is disposed and is disposed outside the cylinder, and is fixed inside the cylinder 10 and the plunger 30 Door opening and closing comprising a guide (50) for guiding the entrance and exit, the packing (60) provided at the inlet of the cylinder inner space (11) and a pressing member (70) for applying elasticity to the plunger (30) in the advancing direction. In the damping device, The plunger head 31 is formed with a concave portion 31b having an outer circumference close to the inner wall of the cylinder and having an inner concave shape and an outer side of the concave portion 31b with a radius smaller than the outer circumference of the concave portion. And a neck portion 31c forming a wide space between the cylinder inner wall and a plurality of passages 31a communicating from the bottom of the concave portion 31b to the outside of the neck portion 31c. , A check valve 40 coupled to the inside of the recess 31b to open the flow passage 31a in one direction; And a stopper (20) fixed to the plunger head (31) to limit movement of the check valve (40). The method of claim 1, The plunger head 31 has a shaft bar 31d protruding into the recessed portion 31b, The check valve 40 is formed of a dish-type check valve 41 which is capable of lifting up and down by the shaft bar 31d and seated inside the recessed portion 31b. The stopper 20 is a damping device for opening and closing the door, characterized in that consisting of a nut (21) coupled to the end of the shaft rod (31d) to prevent separation of the dish type check valve 41 The method of claim 1, The pressing member (70) is a damping device for opening and closing the door, characterized in that installed between the bottom 12 of the cylinder (10) and the plunger head (31). The method of claim 1, The cylinder 10 has a stopper end 13 for protruding one or more steps to restrict the entry of the plunger 30 to the rear of the inner circumferential surface, and the inner diameter is sequentially expanded to couple the guide 50 to the inner circumferential surface. The first step 15 and the second step 17 are formed at predetermined intervals from the inside, The guide 50 is formed with a rod passage 51 of the plunger, a first flange 52 corresponding to the first step 15 is formed at the inner end and the second step 17 at the outer end. A corresponding second flange 53 is formed, The damping device for opening and closing the door, characterized in that the oil absorption material 55 made of a porous material is provided in the space between the first flange 52 and the second flange (53). The method of claim 1, The packing 60 is installed in front of the guide 50, A packing support (61) for supporting the packing (60) and a stator (63) for fixing the packing support (61) to the cylinder, characterized in that the damping device for opening and closing the door. The method of claim 1, The pressurizing portion (37) of the inner end of the plunger which is moved inside the cylinder (10) is a damping device for opening and closing the door, characterized in that the arcuate recess (37a) is formed. The method of claim 1, The plunger head 31 is formed by concave grooves 31e passing through the flow path 31a at the bottom of the recess 31b in a concentric manner. The check valve 40 is formed of a washer type check valve 43 for opening and closing the inlet of the concave groove 31e, The stopper 20 includes a cap type stopper 23 having a part of an outer edge thereof coupled to the plunger head 31 to form a movable allowance space of the washer type check valve 43 and having a flow path hole 23a formed at the center thereof. Door opening and closing damping device characterized in that. The method of claim 7, wherein The cap type stopper 23 is a damping device for opening and closing the door, characterized in that the flange (23b) for supporting the pressing member 70 is formed.

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