KR101726331B1 - Door Catcher - Google Patents

Abstract

The present invention relates to a door catcher which is a semiautomatic sliding door opening / closing apparatus, and is a door catcher which is a semi-automatic door sliding door opening / closing device, which comprises a frame installed on a door, a first frame stopper coupled to one longitudinal end portion of the frame, A catching member rotatably coupled to the elastic member and the damping member, and a second frame cap coupled to the other longitudinal end of the frame, the catching member being moved and hooked.
The door catcher is installed along the opening and closing direction on the door so that the door can be opened and closed automatically by gravity. When the catching member is moved to the second frame stopper, the catching member is fixed and the door is kept open. All components are modularized into one, making installation, replacement and repair easy. Also, the damping force of the damping member and the elastic force of the elastic member can be adjusted to easily control the closing speed of the sliding door or the magnitude of the force for closing the sliding door.

Description

Door catcher {Door Catcher}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sliding door opening / closing apparatus, and more particularly, to a door catcher which is a semiautomatic sliding door opening / closing apparatus installed in a sliding door to automatically open and close a sliding door by gravity.

A sliding door is often used rather than a hinged door for crowded buildings used by many people such as schools and hospitals or for people with mobility problems.

The sliding door is opened and closed by pushing the door in a direction parallel to the door frame. Therefore, when the sliding door is opened and closed, a large opening / closing space is not required, and an accident that hits the door during opening and closing does not occur. In addition, it can be easily opened and closed with a small force, making it easy to use for patients or persons with disabilities.

Sliding doors installed in facilities used by many people are equipped with sliding door opening and closing devices so that they can be kept closed when not in use. Especially, facilities such as hospitals that are required to restrict the access of outsiders or keep the doors closed for health purposes are necessary for such sliding door opening and closing devices.

As a conventional technique related to a sliding door opening / closing device, there are Korean Registered Patent No. 10-1068457 entitled "Semiautomatic Gate" (registered on September 22, 2011) and US registered Patent No. 4,471,575 "Door Clooser" (registered on September 9, 1984) Which is incorporated herein.

The above-mentioned conventional technique relates to a semiautomatic sliding door opening / closing apparatus in which a sliding door is opened by gravity and is automatically closed by an elastic restoring force of an elastic restoring portion.

The elastic restoring portion provided in the sliding door automatically closes the door without power supply by using the elastic restoring force, and the decelerating portion provided in the elastic restoring portion decelerates the closing speed of the door.

When the speed at which the door is closed by the decelerating portion is reduced, it is possible to prevent a person from being injured by being caught or bumped by the door, and the noise generated when the door hits the door frame can be reduced.

The decelerating unit is constituted by a belt pulley connected to a timing belt and a timing belt, as in the above-mentioned conventional technique, and the elastic restoring force is reduced by frictional resistance, or a twin-tube damper using a damping force generated when gas, oil or the like passes through the orifice (twin tube damper) or the like.

However, this prior art focuses on the function of automatically closing the door of the sliding door, so that it is inconvenient to provide an additional device such as a door stopper when the door must be kept open. .

For example, in hospitals, medical carts containing a variety of medical devices are often used. Therefore, the sliding door must remain open for a while when the door is opened with these medical carts. In addition, the sliding door must remain open when cleaning or disinfecting the room to maintain health. This is true not only in hospitals but also in schools and other facilities.

The sliding door opening / closing apparatus according to the related art is provided with an apparatus for applying an elastic restoring force to the door, and a device for reducing the door closing speed. Also, they need to be connected to each other so that they can interact with each other after being installed in the door and the door frame. Therefore, there is a problem that installation is difficult and replacement is difficult when a failure occurs.

Korean Patent No. 10-1068457 "Semi-automatic door" (registered on September 22, 2011) U.S. Patent No. 4,471,575 entitled "Door Clooser" (registered on September 18, 1984)

Disclosure of Invention Technical Problem [8] Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide an automatic door opener for automatically opening / closing a door of a sliding door, A door catcher is a sliding door opening / closing device. In addition, the door catcher can be modularized to simplify installation, replacement, repair, etc., so that it can be easily installed regardless of the shape of the sliding door. We also want to be able to control the speed at which the sliding door closes and the amount of force that closes the sliding door by a simple operation.

According to an aspect of the present invention, there is provided a portable terminal comprising: a pair of side plates which are vertically downwardly formed at both end portions in the width direction of an upper plate and a pair of side plates that extend inwardly at opposite ends of the pair of side plates, A metal profile formed by extending in the longitudinal direction a cross-sectional shape comprising a lower plate and a pair of intermediate plates protruding inward facing each other in the vertical direction middle portion of the pair of side plates, Wherein a space surrounded by the side plate and the pair of intermediate plates constitutes an elastic member accommodating portion, and a space surrounded by the pair of intermediate plates, the pair of side plates, and the pair of lower plates forms a damping member accommodating portion, Wherein the pair of lower plates are spaced apart from each other to form a first slide passage, and the pair of intermediate plates are spaced apart from each other to form a second slide passage Frames; A first frame stopper coupled to one longitudinal end of the frame; A piston provided at a damping member receiving portion of the frame, one end of which is coupled to the first frame stopper, one end of which is slidably inserted into the cylinder, and a piston provided at the other end of the piston, A damping member including a first rotating shaft having a shape extending along the first axis; An elastic body provided in the elastic member receiving portion of the frame and having one end coupled to the first frame stopper, and a second pivotal shaft provided on the other end of the elastic body and extending along the width direction of the frame Elastic member; A first pivotal engagement portion which is provided so as to pass through the second slide passage of the frame and across the elastic member receiving portion and the damping member receiving portion of the frame and is rotatably coupled to the first pivot shaft of the damping member, A catching member body portion having a second pivotal joint portion rotatably coupled to a second coaxial shaft of the frame, the catching member body portion being spaced apart from the first pivotal coupling portion in the other end direction of the frame and coupled to the catching member body portion, A first catching protrusion protruding downward from the catching member body so as to pass through the first slide passage of the frame, a second catching protrusion protruding downward from the catching member body, And is spaced apart from the first catching projection in the direction of the other end of the frame, A catching member comprising a second catching protrusion for forming a catching pawl receiving portion between the first catching protrusion and the catching protrusion; A roller retaining plate coupled to the other end in the longitudinal direction of the frame and having a pivoting space formed therein and having an upper end on a side facing the frame and contacting an intermediate plate of the frame, A second frame stopper formed at a lower end of the lower frame to communicate with the first slide passage of the frame, the second frame stopper being formed at a lower end of the frame, the frame opening being communicated with the damping member receiving portion of the frame; And a control unit.

The first frame stopper may include a stopper body coupled to one end of the frame in the longitudinal direction thereof, the stopper body having a through hole and a female screw hole, and an air discharge passage communicating the inside of the cylinder of the damping member with the outside, An elastic adjusting screw threaded through the through hole and extending along the longitudinal direction of the frame; a spring member which is screwed to the elastic adjusting screw and slides along the elastic member receiving portion of the frame by rotation of the elastic adjusting screw, And an air discharge amount adjusting screw threadably engaged with the female screw hole to adjust an air flow amount of the air discharge passage.

The roller engaging plate of the second frame stopper may include a concave curved surface seating portion formed on the upper surface of the second frame stopper and corresponding to a curved surface shape of the roller of the catching member, And a curved surface guide portion extending toward the intermediate plate of the frame.

As described above, in the door catcher according to the present invention, the door of the sliding door is automatically closed in a certain operation period, and the door is kept open when the door is opened out of a predetermined operation range. This makes it possible to keep the sliding door open without the need for a separate device such as a door stopper, and it is completely closed automatically when the sliding door is slightly moved in the closing direction. In addition, all components are modularized into one, which is installed on the door frame, making installation, replacement and repair easy. It is also possible to adjust the speed at which the sliding door closes or the amount of force that closes the sliding door by simple operation.

1 is a perspective view of a door catcher according to an embodiment of the present invention,
2 is a perspective view of a catching bracket provided on a door,
FIG. 3 is an exploded perspective view of FIG. 1,
Figure 4 is a cross-sectional view of the frame of Figure 3,
Figure 5 is a cross-sectional view of the cap body of Figure 3,
FIG. 6 is a perspective view showing the interior of the second frame stopper of FIG. 3,
7 is a perspective view showing a state where the first frame stopper, the elastic member, the damping member, and the catching member are combined,
FIG. 8 is a cross-sectional view of FIG. 1 and an enlarged view of a main portion,
Fig. 9 is a view showing the door catcher of Fig. 1 installed on a sliding door;
10 is a sectional view showing an automatic closing operation in Fig. 9,
11 is a cross-sectional view showing an open holding state in Fig.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention in the drawings, portions not related to the description are omitted, and like reference numerals are given to similar portions throughout the specification. Whenever a component is referred to as "including" an element throughout the specification, it is to be understood that the element may include other elements, not the exclusion of any other element, unless the context clearly dictates otherwise.

Hereinafter, a door catcher according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a perspective view of a door catcher according to an embodiment of the present invention, FIG. 2 is a perspective view of a catching bracket provided on a door, FIG. 3 is an exploded perspective view of FIG. 1, FIG. 6 is a perspective view showing the interior of the second frame stopper of FIG. 3, FIG. 7 is a sectional view of the first frame stopper, the elastic member, the damping member and the catching member of FIG. Fig. 8 is a cross-sectional view of Fig. 1 and an enlarged view of a main part, Fig. 9 is a view showing a door catcher of Fig. 1 installed on a sliding door, Fig. 11 is a cross-sectional view showing the open holding state in Fig. 9. Fig.

The door catcher according to the present embodiment is installed in the sliding door 10 including the door 11 and the door 12 which is opened and closed on the door 11 as shown in Fig. The sliding door refers to all kinds of doors that are opened and closed in a direction parallel to the door and the door frame, including the door as well as the sliding window.

A catching bracket 13 is provided on the door 12 so that the door catcher can interact with the door 12 of the sliding door 10 as shown in Fig. The latching protrusion 14 is formed so as to protrude vertically from the wide side surface of the door 12 together.

In this embodiment, the catching bracket 13 is provided separately and is provided on the top of the door 12, but it may be integrally manufactured when the door 12 is manufactured.

The door frame 11 is provided with a door catcher which is modularized in one piece. 3, the door catcher includes a frame 100, a first frame stopper 200, a damping member 300, an elastic member 400, a catching member 500, a second frame stopper 600).

4, the frame 100 includes a pair of side plates 120 formed vertically downward at both widthwise ends of the top plate 110 and the top plate 110 and a pair of side plates 120 formed at the bottom of the pair of side plates 120 And a pair of intermediate plates (140) protruding inward facing each other at an upper and lower middle portion of the pair of side plates (120). The pair of lower plates (130) Sectional profile is formed by extending in the longitudinal direction. In this embodiment, an aluminum profile is used for weight reduction.

A space surrounded by the upper plate 110, the pair of side plates 120 and the pair of intermediate plates 140 constitutes the elastic member accommodating portion 150 inside the frame 100 and the pair of intermediate plates 140 And a pair of lower plates 130 constitute a damping member receiving portion 160. The pair of lower plates 130 are spaced apart from each other to form a first slide passage 170, And the pair of intermediate plates 140 are spaced apart from each other to form the second slide passage 180.

The first frame stopper 200 is coupled to one longitudinal end portion of the frame 100. The first frame stopper 200 includes a stopper body 210, an elastic adjustment screw 220, an elastic member coupling block 230, and an air discharge amount adjusting screw 240.

5, a through hole 211 is formed in an upper portion of the stopper body 210 along a longitudinal direction of the frame 100, and a lower end of a frame (not shown) 100 are formed with a cylindrical coupling portion 212 protruding toward the other end.

The cylinder coupling portion 212 is formed with an air discharge passage 214 passing through the surface facing the other end of the frame and the outer peripheral surface of the cylinder coupling portion 212 in a ' The air discharge passage 214 serves to communicate the inside of the cylinder 310, which will be described later, with the outside.

5, a female screw hole 213 is formed in the air discharge passage 214 along the longitudinal direction of the frame 100 so as to communicate with the air discharge passage 214. As shown in FIG.

The through hole 211 is provided with an elastic adjustment screw 220 extending through the through hole 211 and extending along the longitudinal direction of the frame 100. The elastic regulating screw 220 is installed to protrude toward the elastic member receiving portion 150 and the elastic regulating screw 220 is inserted into the elastic member receiving portion 150 of the frame 100 by the rotation of the elastic regulating screw 220, The elastic member engaging block 230 is slidably engaged with the elastic member engaging block 230.

An air discharge amount adjusting screw 240, which is a conical shape whose one end is gradually narrowed, is inserted into and screwed into the female thread hole 213. When the air discharge amount adjusting screw 240 is rotated, one end of the air discharge amount adjusting screw 240 adjusts the opening and closing of the air discharge passage 214. The amount of air flowing through the air discharge passage 214 can be controlled.

The damping member receiving portion 160 of the frame 100 includes a cylinder 310 having one end coupled to the first frame stopper 200, a piston 320 having one end slidably inserted into the cylinder 310, A damping member 300 is provided at the other end of the frame 320 and includes a first pivot 330 having a shape extending along the width direction of the frame 100.

The cylinder 310 has a cylindrical shape and one end portion is fixedly coupled to the cylinder coupling portion 212 of the first frame stopper 200.

A piston 320 is inserted into the cylinder 310 through the other end of the cylinder 310. The piston 320 has a cylindrical shape in which a piston head 321 is provided at one end and an air inlet hole 323 is formed in the outer circumferential surface. The piston head 321 is provided with a check valve member (not shown) which permits only one directional flow of air so that the air flowing into the piston 320 through the air inlet hole 323 of the piston 320 can be moved into the cylinder 310 322 are integrally provided on the piston head 321. [

The check valve member 322 provided in the piston head 321 is a ball type check valve well known in the prior art and can be easily understood by a person skilled in the art, The description will be omitted.

The piston head 321 provided at one end of the piston 320 is in close contact with the inner circumferential surface of the cylinder 310. Since the inner circumferential surface of the cylinder 310 and the outer circumferential surface of the piston 320 are spaced from each other, The air can be smoothly introduced into the cylinder 310 through the piston 320.

The air introduced into the cylinder 310 can be discharged to the outside through the air discharge passage 214 of the first frame stopper 200. Since the air discharge hole 214 is connected to the female threaded hole 213 and the air discharge amount adjusting screw 240 is coupled to the female threaded hole 213, . Due to the limited air discharge, a high pressure is created inside the cylinder 310, thereby causing the damping member 300 to generate a damping force.

The first coaxial shaft 330 has a shape extending along the width direction of the frame 100 as mentioned above. 3, the first coaxial shaft 330 is extended toward the other end of the piston 320 in a 'T' shape so as to serve as a rotary shaft in a state where the first coaxial shaft 330 is fixed to the other end of the piston 320, . The first coaxial shaft 330 is coupled to the catching member 500 to be described later so as to be rotatable.

The elastic member receiving portion 150 of the frame 100 includes an elastic body 410 having one end coupled to the upper portion of the first frame stopper 200 and an elastic member 410 provided at the other end of the elastic member 410, And a second rotating shaft 420 having a shape extending along the first rotating shaft 420.

In this embodiment, the elastic body 410 is a coil spring, and various kinds of elastic bodies 410 may be selected in addition to the coil spring. One end of the elastic body 410 is fixedly coupled to the elastic member engagement block 230 coupled to the stopper body 210 through the first frame stopper 200, and more specifically, the elastic adjustment screw 220.

 The position of the elastic member coupling block 230 in the elastic member receiving portion 150 is adjusted through the elastic adjusting screw 220 and the length of the elastic member 410 is adjusted by adjusting the position of the elastic member coupling block 230 The elasticity can be adjusted by changing the angle.

 The second coaxial shaft 420 has a shape extending along the width direction of the frame 100 as mentioned above. 3, the second coaxial shaft 420 is extended toward the other end of the elastic body 410 in a 'T' shape so as to serve as a pivoting axis in a state of being fixed to the other end of the elastic body 410, . The catching member 500 to be described later is rotatably coupled to the second coaxial shaft 420.

The catching member 500 is rotatably coupled to the first pivot shaft 330 of the damping member 300 and the second pivot shaft 420 of the elastic member 400 as described above.

The catching member 500 includes a catching member body 510, a pair of rollers 520, and first and second catching protrusions 530 and 540.

The catching member body 510 is provided across the elastic member receiving portion 150 and the damping member receiving portion 160 of the frame 100 while passing through the second slide passage 180 of the frame 100. A first rotating coupling portion 511 is formed at a lower portion of the catching member body 510 to be rotatably coupled to the first rotating shaft 330 of the damping member 300 and a second rotating coupling portion 512 And is rotatably coupled to the second rotating shaft 420 of the elastic member 400. [

The catching member body 510 is spaced apart from the first rotation engaging portion 511 in the direction of the other end of the frame 100 and is coupled to the catching member body 510. A pair of intermediate plates A pair of rollers 520 arranged to be in contact with a lower surface of the roller.

The pair of rollers 520 provided on the catching member body 510 rolls along the longitudinal direction of the frame 100 in contact with the lower surface of the intermediate plate 140 of the frame 100 and the catching member 500 smoothly And the catching member 500 does not rotate within the frame 100 but keeps the catching member 500 standing upright. The catching member 500 also rotates inside the second frame stopper 600 to be described later to fix its position.

The catching member 500 includes a first catching protrusion 530 protruding downward to pass through the first slide passage 170 of the frame 100 and a second catching protrusion 530 protruding downward to be engaged with the first A second catching protrusion 540 passing through the sliding passage 170 and spaced apart from the first catching protrusion 530 in the direction of the other end of the frame 100 is provided.

The second catching protrusion 540 is spaced apart from the first catching protrusion 530 to form a locking projection receiving portion 541 between the first catching protrusion 530 and the first catching protrusion 530. The catching pawl receiving portion 541 is a space in which the catching pawl 14 of the catching bracket 13 mentioned above is caught.

The first frame stopper 200, the damping member 300, the elastic member 400 and the catching member 500 are assembled together as shown in FIG. 7 before being inserted into the frame 100. After the assembly as described above, the roller 520 of the catching member 500 is inserted into the frame 100 so as to be in contact with the lower surface of the intermediate plate 140 of the frame 100.

When the catching member 500 is assembled as described above, a force to be pulled toward the first frame stopper 200 is applied to the catching member 500 by the elastic member 400. A force is also applied so that the catching member 500 is pivoted upward about the first pivot 330 of the damping member 300.

When the catching member 500 is moved toward the first frame stopper 200 in a state where the catching member 500 is pulled in the opposite direction of the first frame stopper 200, a damping force, which resists the elastic force by the damping member 300, 500).

The second frame stopper 600 is coupled to the other longitudinal end of the frame 100. A rotating space 610 is formed in the second frame stopper 600 so that the catching member 500 which is moved to the second frame stopper 600 through the other end of the frame 100 can be rotated.

A roller latching plate 620 is formed on the upper side of the face of the second frame stopper 600 facing the frame 100 so that the lower end of the second frame stopper 600 is in contact with the intermediate plate 140 of the frame 100. A roller opening portion 630 communicating with the damping member receiving portion 160 of the frame 100 is formed on the lower side of the surface facing the frame 100. A rotating passage 640 communicating with the second sliding passage 180 of the frame 100 is formed at the lower end so that the first and second catching protrusions 530 and 540 of the catching member 500 can be opened and closed.

The roller engaging plate 620 of the second frame 100 is positioned such that the roller 520 of the catching member 500 moved to the rotating space 610 of the second frame stopper 600 is pressed against the intermediate plate 140 And is moved upward to be caught.

6, the upper portion of the roller latching plate 620 corresponds to the curved surface shape of the roller 520 so as to reduce noise and impact generated when the roller 520 is caught by the roller latching plate 620 And a curved surface receiving portion 621 having a concave curved surface shape.

The lower end of the curved seating part 621, that is, the lower end of the roller holding plate 620 has a convex curved surface shape so that the roller 520 can smoothly move between the roller holding plate 620 and the middle plate 140, And a curved surface guide portion 622 extending toward the guide portion 140. The engaging state of the catching member 500 can be released even with a small force due to the curved surface guide portion 622 of the roller locking plate 620. [

Hereinafter, the installation and use of the door catcher according to one embodiment of the present invention will be described.

As shown in Fig. 9, the door catcher is installed along the opening / closing direction of the sliding door 10 on the upper portion of the door frame 11 of the sliding door 10. At this time, the lower end of the catcher member 500 of the door catcher, that is, the first and second catching projections, should be installed so as to overlap the upper portion of the door 12. The catching bracket 13 is inserted into the upper end of the door 12 so that the latching protrusion 14 is inserted into the latching pawl receiving portion 541 formed between the first and second catching protrusions 530 and 540 in a state where the door 12 is closed. Respectively. Just by fixing the door catcher and the catching bracket 13 to the door 12 and the door frame 11, the entire installation process is completed.

Since the door catcher and the catching bracket 13 are installed as described above, they are not connected to each other. Therefore, the door catcher can be easily separated from the door 12 when repairing or replacing the door catcher. In addition, since only one small catching bracket 13 is provided on the door 12, the weight of the door 12 does not change much.

The catching bracket 13 fixed to the door 12 is moved together with the door 12 when the door 12 is pushed side by side with the door frame 11 as shown in FIG. At this time, since the engaging projection 14 of the catching bracket 13 is inserted into the engaging projection receiving portion 541 of the catching member 500, the catching member 500 is moved toward the other end of the frame 100.

The air is introduced into the cylinder 310 of the damping member 300 while the door is opened so that no large resistance is generated in the damping member 300 while the catching member 500 moves toward the other end of the frame 100 . That is, to open the door, only a force of a magnitude sufficient to overcome the elastic force of the elastic member 400 is applied.

The force that the catching member 500 is pulled toward the one end of the frame 100 by the elastic member 400 while the catching member 500 is moved along the longitudinal direction of the frame 100 within the frame 100 . That is, when the hand 12 is released, the catching member 500 is moved toward the one end of the frame 100 together with the catching bracket 13, so that the door is automatically closed.

When the door is closed, the inflow of air into the cylinder 310 of the damping member 300 is stopped and air is discharged through the air discharge passage 214 of the first frame stopper 200. Since the amount of air discharged through the air discharge passage 214 is limited by the air discharge amount adjusting screw 240, a high pressure is generated inside the cylinder 310, which acts to damp the elastic force of the elastic member 400.

That is, the damping force of the damping member 300 cancels the elastic force of the elastic member 400, thereby restricting the door 12 from being accelerated above a predetermined speed. By limiting the moving speed of the door 12, the door 12 is prevented from being hit by a person, and the door 12 and the door 11 collide with each other to prevent a large noise or the sliding door 10 from being damaged .

The first frame stopper 200 is provided with an elastic adjusting screw 220 and an air discharge amount adjusting screw 240. Accordingly, by adjusting the elasticity adjusting screw 220 to adjust the elastic force, the magnitude of the force for closing the door 12 can be adjusted. When the damping force is adjusted by adjusting the air discharge amount adjusting screw 240, You can adjust the speed.

11, when the door 12 is moved so that the catching member 500 passes through the other end of the frame 100 and moves to the rotating space 610 of the second frame stopper 600, the catching member 500 ) Is rotated upward by the elastic force of the elastic member (400).

When the catching member 500 is rotated, the pair of rollers 520 of the catching member 500 are separated from the pair of intermediate plates 140 of the frame 100, and the roller catching plate of the second frame stopper 600 620). The second catching protrusion 540 passes through the rotating passage 640 of the second frame stopper 600 and is moved into the rotating space 610.

When the second catching protrusion 540 is moved into the rotating space 610 as described above, the catching protrusion 14 of the catching bracket 13 is engaged with the catching recess receiving portion 541 between the first and second catching protrusions 530 and 540, And the door 12 is kept in the open state. In this state, the door 12 can be freely moved in a direction in which the sliding door 10 is opened, and the position of the door 12 can be fixed.

When the door 12 is moved to close the sliding door 10, the locking protrusion 14 pushes the first catching protrusion 530 of the catching member 500 toward the one end of the frame 100. When the first catching protrusion 530 is subjected to a force, the catching member 500 is rotated so that the roller 520 of the catching member 500 is moved to the lower surface of the intermediate plate 140 of the frame 100, (540) also protrudes downward through the pivotal passage (640).

When the second catching protrusion 540 moves downward and returns to the original position, the first and second catching protrusions 530 and 540 catch the catching protrusion 14 and drag the catching protrusion 14 toward one end of the frame 100. That is, the door 12 is automatically closed.

The section in which the door 12 is automatically closed can be changed by making the length of the frame 100, the elastic member 400, and the damping member 300 longer or shorter.

It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the following claims .

It is therefore to be understood that the above-described embodiments are illustrative in all aspects but are not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

10: Sliding door
11: Doorframe 12: Door
13: catching bracket 14:
100: frame
110: upper plate 120: side plate
130: lower plate 140: intermediate plate
150: elastic member receiving portion 160: damping member receiving portion
170: first slide passage 180: second slide passage
200: first frame stopper
210: plug body part 211: through hole
213: female thread hole 214: air discharge passage
220: elastic regulating screw 230: elastic member engaging block
240: Air discharge adjustment screw
300: damping member
310: cylinder 320: piston
330: 1st coaxial
400: elastic member
410: elastic body 420: second coaxial shaft
500: catching member
510: catching member body part 511: first rotating joint part
512: second rotating coupling part 520: roller
530: first catching projection 540: second catching projection
541:
600: second frame stopper
610: Rotating space 620: Roller lock plate
621: curved surface mounting portion 622: curved surface guide portion
630: opening portion for roller 640:

Claims (3)

A pair of side plates which are vertically downwardly formed at both ends in the width direction of the upper plate, a pair of lower plates which are formed to extend inward facing each other at a lower end of the pair of side plates, And a pair of intermediate plates protruding inward facing each other in the longitudinal direction of the metal plate, the metal profile being formed by extending in a longitudinal direction, the metal profile being surrounded by the upper plate, the pair of side plates, Wherein a space enclosed by the pair of intermediate plates, the pair of side plates, and the pair of lower plates forms a damping member accommodating portion, and the pair of lower plates are spaced apart from each other to form a first A frame forming a slide passage, the frame being spaced apart from the pair of intermediate plates to form a second slide passage;
A first frame stopper coupled to one longitudinal end of the frame;
A piston provided at a damping member receiving portion of the frame, one end of which is coupled to the first frame stopper, one end of which is slidably inserted into the cylinder, and a piston provided at the other end of the piston, A damping member including a first rotating shaft having a shape extending along the first axis;
An elastic body provided in the elastic member receiving portion of the frame and having one end coupled to the first frame stopper, and a second pivotal shaft provided on the other end of the elastic body and extending along the width direction of the frame Elastic member;
A first pivotal engagement portion which is provided so as to pass through the second slide passage of the frame and across the elastic member receiving portion and the damping member receiving portion of the frame and is rotatably coupled to the first pivot shaft of the damping member, A catching member body portion having a second pivotal joint portion rotatably coupled to a second coaxial shaft of the frame, the catching member body portion being spaced apart from the first pivotal coupling portion in the other end direction of the frame and coupled to the catching member body portion, A first catching protrusion protruding downward from the catching member body so as to pass through the first slide passage of the frame, a second catching protrusion protruding downward from the catching member body, And is spaced apart from the first catching projection in the direction of the other end of the frame, A catching member comprising a second catching protrusion for forming a catching pawl receiving portion between the first catching protrusion and the catching protrusion;
A roller retaining plate coupled to the other end in the longitudinal direction of the frame and having a pivoting space formed therein and having an upper end on a side facing the frame and contacting an intermediate plate of the frame, A second frame stopper formed at a lower end of the lower frame to communicate with the first slide passage of the frame, the second frame stopper being formed at a lower end of the frame, the frame opening being communicated with the damping member receiving portion of the frame;
Wherein the door catcher comprises:
The method according to claim 1,
Wherein the first frame stopper
A stopper body coupled to one end of the frame in the longitudinal direction thereof, the stopper body having a through hole and a female screw hole, and an air discharge passage communicating the inside of the cylinder of the damping member with the outside, An elastic member engaging block which is threadedly engaged with the elastic adjusting screw and slides along the elastic member receiving portion of the frame by rotation of the elastic adjusting screw and one end of the elastic member of the elastic member is engaged with the elastic adjusting screw, And an air discharge amount adjusting screw screwed to the female screw hole to adjust an air flow amount of the air discharge passage.
3. The method according to claim 1 or 2,
Wherein the roller engaging plate of the second frame cap
And a curved surface guide portion formed on the upper surface of the curved surface seating portion and having a concave curved surface shape corresponding to a curved surface shape of the roller of the catching member and a curved surface guide portion extending toward the intermediate plate of the frame in a convex curved surface shape at a lower end portion of the curved surface seating portion Door catcher.

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