WO2020032667A1

WO2020032667A1 - Sliding door buffer device

Info

Publication number: WO2020032667A1
Application number: PCT/KR2019/010048
Authority: WO
Inventors: 정영호
Original assignee: 정영호
Priority date: 2018-08-10
Filing date: 2019-08-09
Publication date: 2020-02-13

Abstract

The present invention relates to a sliding door buffer device comprising: a first fixed body fixed/coupled inside an upper door frame; a second fixed body fixed/coupled inside the upper door frame while being spaced apart from the first fixed body; a support member installed between the first fixed body and the second fixed body; a cylinder installed between the first fixed body and the second fixed body while being supported by the support member; a rotatable hanger coupled to the front end of a rod of the cylinder and formed to be able to move along the support member; a pivot connecting body mounted on the upper side of the door body such that the door body moves along the upper door frame, the pivot connecting body having an impact protrusion formed at a point thereon such that, when contacting the rotatable hanger, same applies an impact to the rotatable hanger, thereby moving the rotatable hanger along the support member; a buffer spring configured such that, when the impact protrusion applies an impact to the rotatable hanger during door closing, same is deformed by the impact from the impact protrusion, thereby buffering the impact from the impact protrusion; and a door-closing spring configured such that, when the impact protrusion applies an impact to the rotatable hanger, same contacts and positions the door body in the door-closing position.

Description

Sliding Shock Absorber

The present invention relates to a shock absorber for a sliding door, and more particularly, the weight is increased due to the enlargement, while in a sliding door slimmed according to the user's preference, the door closing is quietly finished while alleviating the impact of the door when closing the door. And a sliding buffer device for sliding doors.

Sliding is a general term for doors that are designed to open and close by sliding doors or windows to the side, which has traditionally been used as a door of hanok, and has been gradually increasing in recent years. The door frame supporting the door is becoming thinner according to the consumer's preference for slim design, and it is inevitable to install a shock absorber to alleviate the shock generated when the large door is closed.

An example of such a shock absorber is a shock absorber (patent registration No. 10-0940102) of a sliding door, which is indicated by reference numeral 101 in FIG. 1, and the shock absorber 101 is a door shock absorber ( 110, the door buffer 110 is provided with a support member 111, the movement guide member 113, the binding member 115, and the buffer cylinder (117).

Here, the support member 111 guides the movement of the movement guide member 113 and simultaneously supports the buffer cylinder 117, and the movement guide member 113 is movably coupled to the support member 111. In addition, the binding member 115 binds the binding body 123 that rotates by the pressing of the pressing protrusion 121 when the door is closed with the pressing protrusion 121, and conversely, the pressing protrusion 121 is rotated by the binding body 123. When the binding is released, the door is opened freely. In addition, the buffer cylinder 117 is coupled to the support member 111 and the movement guide member 113 to buffer the pressing force of the door applied to them.

Therefore, the conventional shock absorber 101 is bound with the pressure protrusion 121 while the binding member 115 rotates by pressing the pressure protrusion 121 when the door is closed, thereby preventing the door from being opened and binding from the door. The pressing force applied to the member 115 can be buffered by the operation of the buffer cylinder 117.

However, the conventional shock absorber 101 has to push the door to the door closing position continuously even after the pressing protrusion 121 is coupled with the binding member 115 for the door closing, making the door closing operation cumbersome and troublesome. There was a problem. In addition, in the case of closing the door by applying a temporary force without pushing the door to the door closing position, if the temporary force is weak, the door stops in the middle due to the resistance of the buffer cylinder 117 or the like, and the door is not closed. There was also.

In addition, since the shock absorbing cylinder 117 is strongly resistant to a sudden external force, the shock absorber 101 is damaged by propagating through the shock absorber 101 almost without absorbing the impact applied when the door is strongly closed by a momentary force. There was also a problem that could cause a malfunction.

The present invention has been proposed to solve the problems of the conventional sliding buffer device as described above, when closing the sliding door, by sliding the door, that is, by closing the door closing operation, ease of use of the sliding door The purpose is to greatly promote.

In addition, while the door closing operation is convenient as described above, regardless of the method of closing the door, such as the amount of force applied to the door or the time of applying the force, the door must be closed to a certain extent only when the door approaches the door closing position. Another purpose is to improve the safety and reliability of closing the sliding door.

In addition, by effectively absorbing and mitigating the strong impact generated when the door is closed, another purpose is to remove or reduce the damage or failure caused by the shock absorber itself as well as the door frame or door. .

The present invention to achieve this object, the first fixing body fixedly coupled to the upper door frame; A second fixing body spaced apart from the first fixing body and fixedly coupled to the upper door frame; A support member installed between the first fixing body and the second fixing body; A cylinder supported and installed by the support member between the first fixing body and the second fixing body; A rotary hook coupled to the rod end of the cylinder and formed to be movable along the support member; It is mounted on the upper side of the door so that the door is moved along the upper door frame, when one point is in contact with the rotary hook, the impact of the rotary hook to move the rotary hook along the support member A pivot connection body in which an impact protrusion is formed; A shock absorbing spring which deforms by the impact of the impact protrusion and buffers the impact caused by the impact protrusion when the impact protrusion imparts an impact to the rotary hook when the door is closed; And a door closing spring which allows the door to be positioned at the door closing position while contracting when the impact protrusion strikes the rotating hook.

In addition, the support member, the support member body constituting the body; A guide part formed to penetrate in the longitudinal direction of the main body so that the rotatable hook can move, and both sidewalls of which a guide rail is formed to allow movement of the rotatable hook only in the longitudinal direction; And a seating part formed at the tip of the guide part to allow the rotation hook to be seated on the tip of the guide part when the rotation hook reaches the tip position.

In addition, the rotary hook, the hook body forming the body of the rotary hook, is formed to be movable along the guide portion; A coupling part formed at one side of the hook body so that the rod front end of the cylinder is coupled; A first protrusion protruding from a lower portion of the hook body and configured to move the hook body along the guide part by contacting the impact protrusion when the door is switched from an open position to a closed position; A second protrusion protruding from the first protrusion at a lower portion of the hook body so that the impact protrusion contacts and moves the hook body along the guide when the door is switched from a closed position to an open position; And a spring catching part formed at an upper portion of the hook body so that one end of the door closing spring is coupled, so that the hook body can be moved along the guide part when the door closing spring contracts when the door is closed. It is desirable to.

In addition, the cylinder is inserted therein, and further comprises a cylinder housing to allow the shock absorbing spring is installed elastically, the cylinder housing is the cylinder body is inserted into the outer body, the shock absorbing spring is fitted into the outer circumference; Protruding to one end of the housing body, a spring sheet for elastically supporting one end of the shock absorbing spring;

According to the sliding buffer device of the present invention, when the door of the sliding door is closed, that is, when the door is closed, the shock applied to the shock absorber by the door is closed by the shock absorbing spring, and at the same time, to the closed door It is possible to more effectively alleviate the impact applied by the cylinder only, and thus it is possible to prevent damage or failure of the shock absorber itself as well as the door frame or the door.

In addition, if the door is closed only until the impact protrusion is caught by the rotating hook during the door closing, the door automatically moves to the door closing position by the restoring force of the door closing spring, so the door is not retracted until the door closing is completed. Since it is not necessary, it is possible to further improve the user's convenience for closing the door.

In addition, as long as the impact projection is combined with the rotating hook as described above during the door closing operation, the door is necessarily closed, thereby greatly improving the locking safety and reliability of the sliding door.

1 is a view showing a conventional sliding buffer device.

Figure 2 is a perspective view showing a state of use of the sliding buffer according to an embodiment of the present invention.

Figure 3 is an enlarged perspective view showing the shock absorber of Figure 2 in a state in which the rotating hook is located in the door closed position.

Figure 4 is an exploded perspective view of the shock absorber of Figure 2;

5 is an enlarged view of a portion B of FIG. 4;

FIG. 6 is an enlarged view of a portion C of FIG. 4; FIG.

7 is an enlarged view of a portion D of FIG. 4.

8 is an enlarged perspective view showing the shock absorber of FIG. 3 in a state in which the rotary hook is advanced and positioned at the leading position of the support member.

Figure 9 is a perspective view of the shock absorber of Figure 8 with the support member removed in a state in which the rotating hook is pivotally rotated in a distal position.

10 is an enlarged perspective view of the shock absorber of FIG. 9 in a state in which the pivot connector is separated from the rotating hook.

FIG. 11 is a perspective view illustrating the shock absorbing device of FIG. 10 in which the first and second fixing plates have been removed, with the impact protrusion reversing according to the door closing, with the shock started;

FIG. 12 is a perspective view illustrating the shock absorber of FIG. 10 in a state in which the pivot connecting body is moved backward in the position of FIG. 11 by pivoting the rotating hook, and then the whole moving body is moved backward to compress the shock absorbing spring.

FIG. 13 is a perspective view illustrating a state in which the rotating hook reverses the shock absorber of FIG. 12 together with the movable body to maximize the shock absorbing spring; FIG.

FIG. 14 is a perspective view showing the rotation of the shock absorber of FIG. 13 in a reverse direction, but the frame is advanced by the reaction of the shock absorbing spring; FIG.

15 is a view of another embodiment of a support member of the present invention.

Sliding buffer according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

As shown in FIG. 2, the sliding shock absorber of the present invention is employed in a sliding door 10 such as a single sliding door, so that the shock applied to the door frame 20 or the shock absorber 1 itself when the sliding door 10 is closed. Absorbed and relaxed, as shown in detail in FIG. 2A and FIGS. 3 to 4, the first fixing body 3, the second fixing body 6, the supporting member 21, the cylinder 25, Rotating hanger 23, pivot connector 7, the buffer spring (8), and the door closing spring (27).

The first fixing body 3 is fixedly coupled to a point in the upper door frame 20, as shown in FIGS. 2 and 3, through the first fixing plate 11 fixed to the upper door frame 20. It is fixed in the upper door frame 20, but may be fixed to the upper door frame 20 in various other ways. In this case, as shown in detail in FIG. 2, the first fixing plate 11 is fitted into the fixing groove 12 extending in the moving direction, that is, the longitudinal direction, of the door 30 along the inner wall of the upper door frame 20.

In addition, as shown in FIGS. 2 to 4, the first fixing body 3 is a pair of symmetrical mutually extending in the longitudinal direction so as to support the support member 21 to be described later to be movable in the longitudinal direction. A rail bar 13 and a fastening plate 15 for tying these tips together are provided. At this time, the fastening plate 15 is bent into a L-shape is detachably coupled to the first fixing plate 11 by a fastening screw or the like.

In addition, the first fixing body 3, as shown in B in FIG. 5, the

guide protrusions

17 and 18 extend in the longitudinal direction at the upper and lower ends of the inner edge of the rail bar 13, respectively, these guides. The

projections

17 and 18 fit the guide blades 33 of the support member 21 in the gap generated therebetween to guide the longitudinal movement of the support member 21 more stably.

The second fixing body 6 is fixed to the upper door frame 20 by being spaced apart from the first fixing body 3 and may be fixed to the upper door frame 20 in various ways, and bent with the fastening plate part 61. The part 62 is provided.

The fastening plate part 61 is a part for fixing the second fixing body 6 to the upper door frame 20, and the fastening plate part 61 is fixed to the upper door frame 20 by fastening means such as bolts.

The bent portion 62 is a portion bent in an A shape on one side of the fastening plate portion 61, and the bent portion supports one end of the shock absorbing spring 8 described later, and one end of the cylinder housing 29 is fitted therein. The hole 63 is formed so that it can be made. Reference numeral 45 is a bushing in which one end of the cylinder housing 29 is fitted.

The supporting member 21 is a member installed between the first fixing body 3 and the second fixing body 6 to support the cylinder 25 to be described later. The supporting member 21 may be formed in various forms. As shown in the drawing, a support member body 31 constituting the body of the support member 21, a guide part 35, and a seating part 36 are provided.

The support member main body 31 is a part for supporting the cylinder 25 to be installed therein, and may be formed in various forms. For example, the support member main body 31 is formed of a body having a semi-cylindrical shape that is totally overturned as shown in FIG. 4. Guide blades 33 are formed extending in the longitudinal direction at the lower ends of the left and right sides of the body. Therefore, the support member 21 is supported to be able to move forward and backward along the gap between the

guide protrusions

17 and 18 formed in the first fixing body 3 through the guide blade 33. Here, as shown in FIG. 4, the support member 21 maintains a semi-cylindrical shape from the rear end of the main body 31 to about one third of the elapsed time, but from thereafter, to the seating portion 36 of the tip. The guide part 35 penetrates up and down to extend in the longitudinal direction.

Reference numerals

38 and 39 are fixing pieces and screw holes for supporting the cylinder 25 to be movable along the upper door frame 20 by the support member body 31.

The support member main body 31 has been described as consisting of a body having a semi-cylindrical shape in the above description as a whole, but in addition to the above form if the support member main body 31 is a form that can support the cylinder 25 in any form As an example, as shown in FIG. 15, the cylinder 25 may be formed of a main body having a hole 34 through which the cylinder 25 may pass. Reference numeral 49 is a fitting portion for allowing one end of the main body shown in Figure 15 is fitted into the fixing groove 12 formed in the interior of the upper door frame 20 to move the main body along the upper door frame 20.

The guide part 35 is formed to penetrate in the longitudinal direction inside the main body 31 so that the rotating hook 23 to be described later is movable, and both side walls of the rotating hook 23 are illustrated in FIG. 7. Guide rails 37 that allow movement only in the longitudinal direction are formed, and a pair of guide wings 33 are formed on both outer sidewalls, as shown in FIG. 4, and the guide wings 33 have a first fixing body. It is possible to advance back and forth along the gap between the

guide protrusions

17 and 18 formed in (3).

The seating portion 36 is formed at the tip of the guide portion 35 so that the rotary hook 23 rests on the tip of the guide portion 35 when the rotary hook 23 reaches the tip position. As shown in FIG. 7, a groove is formed in a portion from the tip of the guide part 35 toward the bottom, so that when the rotary hook 23 is located at the tip of the guide part 35, A portion is inserted into the seating portion 36 to be tilted upwards. However, for this purpose, the seating part 36 forms an upwardly inclined rail 39 by gradually increasing the front end of the guide rail 37 extending from the guide part 35 toward the front along the inner circumferential surface thereof.

The cylinder 25 is installed by being supported by the support member 21 between the first fixing body 3 and the second fixing body 6, and the rod 53 of the cylinder 25 is shown in FIG. As described above, a hinge pin 55 is formed to allow the rotation hook 23 to be pivotably coupled.

Therefore, the rod 53 of the cylinder 25 is contracted or extended along the guide portion 35 of the support member 21 when the door 30 moves, and the cylinder 30 is in the closed state. The rod 53 of the 25 is positioned in the maximum contracted state as shown in FIG. 3, and when the door 30 is opened, the rod 53 of the cylinder 25 is of the rotary hook 23. When the rotation hanger 23 reaches the seating portion 36 of the support member 21, the rotation hanger 23 is second protrusion 41 as indicated by the arrow E in FIG. Is rotated upward and is accommodated in the seating portion 36, and in this state, the rod 53 of the cylinder 25 is extended to the maximum as shown in FIGS. 9 and 10.

The rotary hook 23 is coupled to the tip of the rod 53 of the cylinder 25 and is formed to be movable along the support member 21. When the door 30 is closed, the rotary hook 23 is an impact protrusion. Due to the impact of 72, the rod 53 of the cylinder 25 is contracted while being rotated as indicated by arrow F in FIG. 11, and when the door 30 is opened, the rotating hook 23 is the rod of the cylinder 25. When the rotating hanger 23 reaches the seating portion 36 of the supporting member 21 while extending the 53, the rotating hanger 23 is rotated as indicated by the arrow E in FIG. As the door 30 is opened, as shown in detail in FIG. 6, the hook body 40, the coupling part 44, the first protrusion 42, the second protrusion 41, and the spring catching part Including 48.

Hanger body 40 forms the body of the rotary hook 23, is formed to be movable along the inside of the guide portion 35, may be formed in various forms, as shown in Figure 6, for example, as a whole It can take the form of a triangular hook.

Coupling portion 44 is formed on one side of the hook body 40 to be coupled to the front end of the rod 53 of the cylinder 25, so that the hook body 40 is inclined by hinged to the front end of the cylinder 25 The hook body 40 can be tilted up and down with respect to the coupling part 44 by being formed as a circular hole.

The first protrusion 42 protrudes from the bottom of the hook body 40, and when the door 30 is switched from the open position to the closed position, the impact protrusion 72 contacts and the hook body 40 guides. To be moved along the portion 35.

The second protrusion 41 is protruded to be spaced apart from the first protrusion 42 at the lower portion of the hook body 40, and when the door 30 is switched from the closed position to the open position, the impact protrusion 72 is In contact with the hook body 40 is moved along the guide portion (35).

An accommodating part 43 is formed between the first protrusion 42 and the second protrusion 41 to accommodate the impact protrusion 72, and the first protrusion 42 and the second protrusion 41 are formed therein. When the facing surface has an approximately vertical shape, the impact protrusion 72 can further improve the effect of pressing the first protrusion 42 and the second protrusion 41.

As shown in FIG. 6, the first protrusions 42 and the second protrusions 41 are provided with protruding surfaces 46 protruding from the hook bodies 40, and the protruding surfaces 46 are hook bodies ( 40) is prevented from being lifted upward.

The spring engaging portion 48 is formed on the upper portion of the hook body 40, and the door closing spring 27 to be described later is formed to protrude so as to be connected to the hook body 40, and the door closing spring 27 when the door 30 is closed. By the hook body 40 to be moved along the guide portion 35 by the, it may be formed in various forms, as an example, as shown in Figure 6, the upper hook body 40 Protruding in both side directions of the bent and formed by bending a part, when the door closing spring 27 is hooked, the door closing spring 27 is caught in the bent portion, so that the door closing spring 27 is secured by a spring catching part ( 48).

On the other hand, the rotary hook 23 may further include a protrusion 45 symmetrically protruding from both sides of the hook body 40, the protrusion 45 is the rotary hook 23 is along the guide portion 35 As it can be guided, as shown in Figure 6, it protrudes to extend in the longitudinal direction, respectively, above the first projection 42 and the second projection (41).

Therefore, when the rotary hook 23 is impacted by the impact protrusion 72 at the tip position as shown in FIG. 8, when the first protrusion 42 is moved by the impact of the impact protrusion 72, the guide Since the guide rail 37 of the part 35 is located between the protruding surface 46 of the rotary hook 23 and the protruding portion 45, the rotary hook 23 is the guide rail 37 of the guide part 35. It is constrained to only linear movement along the longitudinal direction.

Pivot connector (7) is mounted on the upper side of the door 30 to move the door 30 along the upper door frame 20, in the center so that the door 30 is moved along the upper door frame (20) A hole 71 into which a pivot pin (not shown) is fitted is formed, and both sides thereof are moved along the inner wall of the upper door frame 20, that is, in the longitudinal direction, as shown in FIG. 4. Guide protrusions 73 are formed to be guided by being inserted into the extended fixing groove 19.

In addition, when one point of the pivot connector (7) comes in contact with the rotary hanger 23, the impact protrusion to impact the rotary hanger 23 to move the rotary hanger 23 along the support member 21 72 is formed.

Impact protrusion 72 is to transmit the impact due to the opening and closing of the door 30 directly to the first protrusion 42 or the second protrusion 41 of the rotary hook 23, the impact protrusion 72 is a rotary hook When the first protrusion 42 or the second protrusion 41 of 23 is in contact, the rotating hook 23 also moves in the direction in which the impact protrusion 72 moves.

The shock absorbing spring 8 is deformed by the impact of the impact projection 72 when the impact protrusion 72 impacts the rotating hook 23 when the door 30 is closed, thereby impacting the impact by the impact protrusion 72. As a buffer, it may be installed in various forms, and as an example thereof, it may be installed by being fitted to the outer circumference of the cylinder housing 29.

The cylinder housing 29 has a cylinder 25 fitted therein and a shock absorbing spring 8 fitted therein, and includes a housing main body 58 and a spring seat 59.

The housing main body 58 is formed of a hollow cylindrical body to allow the cylinder 25 to be inserted therein, and the buffer spring 8 is fitted to the outer circumference thereof, and one end of the housing body 58 is a bent portion of the second fixing body 6. When the shock absorbing spring 8 is inserted into the hole 63 formed in the 62 and the shock absorbing spring 8 is contracted, the housing main body 58 passes through the hole 62 to cushion the impact caused by the impact protrusion 72. .

The spring seat 59 protrudes from one end of the housing main body 58 to elastically support one end of the shock absorbing spring 8.

Accordingly, one end of the shock absorbing spring 8 is supported by the second fixing body 6, and the other end thereof is in contact with the spring seat 59 formed at one end of the cylinder housing 29 so as to contact the spring seat 59 and the second height. Resilient installation between the stagnation (6), when the door (30) when the rotating hanger 23 is moved in the direction of the second fixed body 6, the impact applied to the rotating hanger 23 is a spring seat (59) It is transmitted to the shock absorbing spring (8) through, so that the shock absorbing spring 8 is stretched and at the same time it is possible to mitigate the impact applied to the door frame.

When the door closing spring 27 impacts the rotary hook 23 when the impact protrusion 72 contracts, the door 30 is gradually positioned in the door closing position while being contracted, and one end thereof is the rotary hook 23. ) Is caught by the spring engaging portion 48, and the other end is fixedly supported at one point of the second fixing body 6.

Here, it is preferable that two door closing springs 27 are arranged in pairs one by one on the left and right sides of the rotary hanger 23, and two door closure springs 27, one on the left and right sides of the rotary hanger 23, are formed as described above. When arranged, when the rod 53 of the cylinder 25 contracts, it can be made to contract | contract in a balanced state without biasing to one side.

In addition, although the door closing spring 27 is described as being supported at one point of the second fixing body 6 in the above description, one end of the door closing spring 27 is one point of the second fixing body 6. It is not necessary to be supported at, but may be to be supported at any point inside the upper door frame (20).

Referring to the operation of the sliding buffer according to a preferred embodiment of the present invention as described above are as follows.

The sliding buffer device of the present invention is installed at one end of the upper door frame 20 or the door structure having the same function, for example, when mounted to the rear end of the upper door frame 20, as shown in FIG. The impact on the upper door frame 20 or the sliding buffer device 1 due to the collision with the door 30 is alleviated or absorbed.

This process will be described step by step through the drawings.

First, the sliding shock absorber 1 in the closed state of the door is a state in which the rod 53 of the cylinder 25 is fully contracted to the rear end, that is, the impact protrusion by the rotation hook 23 as shown in FIG. 3. Along the 72 the door 30 is in the maximum reversed state, so the door 30 abuts the side door frame to close the sliding door 10.

In this state, when the user advances the door 30 to the right side of FIG. 2 and the door is opened, the impact protrusion 72 and the rotating hook 23 move while the pivot connector 7 moves together with the door 30. Advances to the right to reach the tip position shown in FIG. At this time, the rod 53 and the door closing spring 27 of the cylinder 25 is extended to the maximum. Subsequently, due to the continuous advancement of the pivotal connector 7, the rotary hook 23 moves up the cylinder (as shown in FIG. 9) while the second protrusion 41 moves up the inclined rail 39 shown in FIG. 7. It is inclined while rotating in an upward direction about the hinge pin 55 of 25). Accordingly, the impact protrusion 72 released from the receiving portion 43 is advanced to the right away from the load of the door closing spring 27 and the cylinder 25, as shown in Figure 10, the pivot connector 7 is The rotating hanger 23 is to be separated, the door 30 is opened. In addition, even if the external force by the impact protrusion 72 is removed from the rotating hook 23, the second protrusion 41 is accommodated inside the seating portion 36 of the support member 21, as shown in FIG. By the locking, despite the restoring force of the door closing spring 27, it is positioned in the seating portion 36 of the support member 21.

In this state, when the user reverses the door 30 to the left side of FIG. 10 and the door is closed, the impact protrusion 72 reaches the tip position as shown in FIG. The collision with the 1st protrusion 42 of the hanger 23 is started. However, it is assumed that the door closing operation of the user pushes the door 30 to the door closing position at once, rather than holding the door 30 and continuously moving backward. Accordingly, the rotating hanger 23 is inclined downward in FIG. 11 to be parallel to the guide part 35 as shown in FIGS. 8 and 12. Thereafter, the rotary hook 23 is subjected to the impact in the backward direction by the impact protrusion 72 of the pivot connector 7, and is pressed backward by the restoring force of the door closing spring 27.

As described above, the impact direction 72 applied to the rotary hook 23 by the impact protrusion 72 is transmitted to the cylinder 25 through the rotary hook 23 to contract the rod 53 of the cylinder 25 and at the same time the cylinder. (25) It self reverses with respect to the support member 21. At this time, the cylinder 25 reverses the rod 53 of the cylinder 25 at an extremely low speed by internal resistance, while the rear end of the cylinder 25 is blocked by the cylinder housing 29 so that the cylinder housing 29 at the time of the above impact. Reversing momentarily, and begins to compress the shock absorbing spring (8) through the cylinder housing (29). At this time, the support member 21 moves backwards at substantially the same time as the rotary hook 23 and the cylinder 25 due to friction with the rotary hook 23 and the cylinder 25.

In other words, the rod 23 of the cylinder 25 hardly contracts due to the internal resistance during the initial collision with the impact protrusion 72, while the rod 53 and the cylinder ( The cylinder housing 29 is retracted and the buffer spring 8 is compressed by reversing the cylinder housing 29 while the support member 21 is rotated by the rotating hook 23 and the cylinder 25 by friction, as shown in FIG. 12. Back along the rail bar (13).

Then, as shown in FIG. 13, when the shock absorbing spring 8 is maximally compressed, the movable body 5 can no longer retract along the rail bar 13, and reach rear dead center, and then the shock absorbing spring ( By the repulsion of 8), the cylinder housing 29 and the support member 21 are advanced as shown in FIG. However, even at this time, the door 30 and the impact protrusion 72 still maintains the reverse, so that the rod 53 of the cylinder 25 begins to contract in earnest at this time.

Thereafter, the rotating hook 23 is continuously retracted by the door closing spring 27 to pull the impact protrusion 72 to the door closing position at a relatively slow speed, and finally the door 30 to the door closing position. As a result, the door 30 is closed, and repeats the above operation every time it is opened and closed.

The present invention has the effect that the shock applied to the shock absorber by the door at the time of closing the door is first received and buffered by the shock absorbing spring, and the door is completely closed by the door closing spring.

Claims

A first fixing body 3 fixedly coupled to the upper door frame 20;

A second fixing body (6) spaced apart from the first fixing body (3) and fixedly coupled to the upper door frame (20);

A support member 21 installed between the first fixing body 3 and the second fixing body 6;

A cylinder 25 supported and installed by the support member 21 between the first fixing body 3 and the second fixing body 6;

A rotary hook 23 coupled to the tip of the rod 53 of the cylinder 25 and formed to be movable along the support member 21;

It is mounted on the upper side of the door 30 so that the door 30 is moved along the upper door frame 20, when one point is in contact with the rotary hook 23, the rotary hook 23 A pivot connector (7) having an impact protrusion (72) formed to give an impact to move the rotating hook (23) along the support member (21);

When the impact protrusion 72 impacts the rotary hook 23 when the door 30 is closed, the shock protrusion 72 is deformed by the impact of the impact protrusion 72 to cushion the impact caused by the impact protrusion 72. Buffer spring 8; And

When the impact protrusion 72 impacts the rotating hanger 23, the door closing spring 27 for positioning the door 30 in the closed position while contracting, characterized in that it comprises a Sliding shock absorber.
The method according to claim 1,

The support member 21,

A support member body 31 constituting the body;

The rotary hook 23 is formed to penetrate in the longitudinal direction inside the main body 31 to allow movement, and the guide rail 37 to allow the movement of the rotary hook 23 in the longitudinal direction on both side walls. The guide portion 35 is formed; And

A seating part 36 formed at the tip of the guide part 35 to allow the rotary hook 23 to rest on the tip of the guide part 35 when the rotary hook 23 reaches the tip position; Sliding cushion for sliding, comprising a.
The method according to claim 2,

The rotary hook 23,

A hook body 40 which forms a body of the rotary hook 23 and is formed to be movable along the inside of the guide part 35;

A coupling part 44 formed on one side of the hook body 40 so that the rod 53 front end of the cylinder 25 is coupled;

Protruding from the lower portion of the hook body 40, when the door 30 is switched from the open position to the closed position, the impact protrusion 72 is in contact with the hook body 40 to the guide portion 35 A first protrusion 42 to be moved along;

The hook body 40 is protruded to be spaced apart from the first protrusion 42, and when the door 30 is switched from the closed position to the open position, the impact protrusion 72 is in contact with the hook A second protrusion 41 for moving the main body 40 along the guide part 35; And

One end of the door closing spring (27) is formed on the upper portion of the hanging body 40, when the door 30 is closed when the door closing spring (27), the hanging body 40 is the And a spring catching portion (48) for moving along the guide portion (35).
The method according to claim 1,

The cylinder 25 is fitted therein, and further includes a cylinder housing 29 to allow the shock absorbing spring (8) to be installed elastically,

The cylinder housing 29

A housing main body 58 into which the cylinder 25 is inserted and into which the buffer spring 8 is fitted;

And a spring seat (59) for protruding at one end of the housing body (58) to elastically support one end of the buffer spring (8).