KR102184819B1 - Shock Absorbing Device For Sliding Door - Google Patents

Abstract

The present invention relates to a shock absorber for sliding doors, comprising: a first fixture fixedly coupled within an upper door frame; A second fixture spaced apart from the first fixture and fixedly coupled to the upper door frame; A support member installed between the first fixture and the second fixture; A cylinder supported by the support member and installed between the first fixture and the second fixture; A rotating hanger coupled to the rod tip 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, and when it comes into contact with the rotating hanger at one point, the rotating hanger is impacted to move the rotating hanger along the support member. A pivot connector in which an impact protrusion is formed; A buffer spring that is deformed by the impact of the impact protrusion when the impact protrusion exerts an impact on the rotating hanger when the door is closed and buffers the impact by the impact protrusion; And a door closing spring configured to position the door in the door closed position while contracting when the impact protrusion exerts an impact on the rotating hanger, and a shock absorber by the door when the door is closed by the above configuration. At the same time, the shock applied to the door is quickly received by the cushioning spring, and at the same time, the door can be completely closed by the door closing spring.

Description

Shock Absorbing Device For Sliding Door}

The present invention relates to a shock absorber for sliding doors, and more particularly, in the case of a sliding door that has been slimmed to fit the user's preference, while the weight has increased due to an increase in size, while reducing the impact caused by the door leaf 30 when the door is closed, the door closing is possible. It relates to a shock absorber for sliding doors that can be quietly finished.

Sliding is a collective term for a door or a door that is to be opened and closed by pushing a door or window sideways.It has been traditionally used as a door of a hanok, and it has been gradually increasing in size in recent years, although the weight of the door leaf increases rapidly due to the increase in size. According to consumer preferences for slim design, the door frame supporting the door is gradually tapering, and it is inevitable to install a shock absorber to mitigate the impact that occurs when closing a large door.

As an example of such a shock absorber, a shock absorber for a sliding door (patent registration No. 10-0940102) shown by reference numeral 101 in FIG. 1 may be mentioned, and the shock absorber 101 is, as shown, a door shock absorber ( 110), the door buffer unit 110 is again provided with a support member 111, a moving guide member 113, a binding member 115, and a buffer cylinder (117).

Here, the support member 111 guides the movement of the movement guide member 113 and supports the buffer cylinder 117 at the same time, 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 pressing the pressing projection 121 when the door is closed, and binds the pressing projection 121 with the pressing projection 121, and conversely, the pressing projection 121 by the rotation of 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 pressing protrusion 121 while the binding member 115 rotates due to the pressing of the pressing protrusion 121 when the door is closed, so that the door can be prevented from being opened, and is bound from the door. It is possible to buffer the pressing force applied to the member 115 by the operation of the buffer cylinder 117.

However, the conventional shock absorber 101 has to continuously push the door to the door closing position even after the pressing protrusion 121 is coupled with the binding member 115 for door closing, making the door closing operation cumbersome and cumbersome. There was a problem. In addition, when the door is not pushed to the door closing position and is to be closed by applying a temporary force, if the force applied temporarily is weak, the door stops in the middle due to resistance of the buffer cylinder 117, and the door is not closed. There was also.

In addition, the buffer cylinder 117 strongly resists sudden external force, so when the door is strongly closed with an instantaneous force, it hardly absorbs the applied shock and propagates to the entire shock absorber 101, thereby damaging the shock absorber 101. There was also a problem that could cause or breakdown.

KR 10-0940102

The present invention has been proposed to solve the problem of the conventional sliding door shock absorber as described above, and when closing the door of the sliding door, the operation of pushing the door, that is, the door closing operation, is shortened, thereby improving the convenience of use of the sliding door. Its purpose is to greatly improve.

In addition, while making the door closing operation convenient as described above, the door panel 30 can approach the door closing position to some extent regardless of the method of door closing operation, such as the magnitude of the force applied to the door panel 30 or the time the force is applied. Another purpose is to improve the safety and reliability of the sliding door by closing it if necessary.

In addition, by effectively absorbing and mitigating the strong impact that occurs when the door is closed, it is another purpose to eliminate or reduce damage or failure caused by the shock absorber itself, as well as the door frame or door 30. There is a purpose.

In order to achieve this object, the present invention comprises: a first fixture fixedly coupled within an upper door frame; A second fixture spaced apart from the first fixture and fixedly coupled to the upper door frame; A support member installed between the first fixture and the second fixture; A cylinder supported by the support member and installed between the first fixture and the second fixture; A rotating hanger coupled to the rod tip 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, and when it comes into contact with the rotating hanger at one point, the rotating hanger is impacted to move the rotating hanger along the support member. A pivot connector in which an impact protrusion is formed; A buffer spring that is deformed by the impact of the impact protrusion when the impact protrusion exerts an impact on the rotating hanger when the door is closed and buffers the impact by the impact protrusion; And a door closing spring configured to position the door in the door closed position while contracting when the impact protrusion applies an impact to the rotating hanger.

In addition, the support member, the support member body constituting the body; A guide portion formed to penetrate the body in a longitudinal direction so that the rotation hanger is movable, and a guide rail formed on both side walls to allow movement of the rotation hanger only in the longitudinal direction; And a seating portion formed at the front end of the guide portion to allow the rotary hook to be seated on the front end of the guide portion when the rotary hook reaches a line unit value.

In addition, the rotating hanger, constituting the body of the rotating hanger, a hanger body formed to be movable along the inside of the guide portion; A coupling portion formed on one side of the hook body so that the rod tip portion of the cylinder is coupled; A first protrusion protruding from a lower portion of the hanger body and allowing the impact protrusion to contact and move the hanger body along the guide when the door is switched from an open position to a closed position; A second protrusion formed at a lower portion of the hanger body to be spaced apart from the first protrusion so that when the door is switched from a closed position to an open position, the impact protrusion contacts to move the hanger body along the guide part; And a spring engaging part formed on the upper part of the hanger body so that one end of the door closing spring is coupled, and allowing the hanger body to move along the guide part when the door closing spring contracts when the door is closed. It is desirable to do.

In addition, the cylinder is fitted inside and further comprises a cylinder housing for elastically installing the buffer spring on the outside, wherein the cylinder housing is a housing body into which the cylinder is inserted and a buffer spring is fitted to the outer circumference; It is preferable to include a spring sheet protruding from one end of the housing body to support elasticity of one end of the buffer spring.

According to the shock absorber for sliding doors 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 that is closed is firstly received quickly by the cushioning spring to buffer the door and at the same time It is possible to more effectively mitigate the impact applied by the cylinder than when buffering only with a cylinder, and thus, damage or failure of the door frame or door as well as the shock absorber itself can be prevented from this impact.

In addition, if the door is retracted only until the impact protrusion is caught by the rotating hanger when the door is closed, the door is automatically moved to the door closed position by the restoring force of the door closing spring, so the door is not retracted until the door is closed. Since there is no need, it is possible to further improve the user's operation convenience for closing the door.

In addition, as long as the impact protrusion is combined with the rotating hanger during the door closing operation, the door must be closed, so that the locking safety and reliability of the sliding door can be greatly improved.

1 is a view showing a conventional sliding door shock absorber.
Figure 2 is a perspective view showing a state of use of the shock absorber for sliding door according to an embodiment of the present invention.
3 is a perspective view showing an enlarged view of the shock absorber of FIG. 2 in a state in which the rotating hanger is positioned 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 part B of FIG. 4.
6 is an enlarged view of part C of FIG. 4.
7 is an enlarged view of part D of FIG. 4.
8 is a perspective view showing an enlarged view of the shock absorber of FIG. 3 in a state in which the rotating hanger is advanced and positioned at the line unit value of the support member.
FIG. 9 is a perspective view showing the shock absorber of FIG. 8 with the support member removed in a state in which the rotating hanger pivotally rotates in a line unit value.
10 is an enlarged perspective view of the shock absorber of FIG. 9 in a state where the pivot connector is advanced and separated from the rotating hanger.
11 is a perspective view showing the shock absorber of FIG. 10 from which the first and second fixing plates are removed, in a state in which the impact protrusion is retracted according to the door closing and the impact is started.
FIG. 12 is a perspective view showing the shock absorber of FIG. 10 in a state in which the pivot connector is retracted from the position of FIG. 11 and closed by pivoting the rotary hook, and then the entire moving body moves backward to compress the buffer spring.
13 is a perspective view showing a state in which the shock absorber of FIG. 12 is retracted together with the moving body to compress the shock absorber spring to the maximum.
14 is a perspective view showing the shock absorber of FIG. 13 in a state in which the rotation distance is reversed, and the frame is advanced by the recoil of the shock absorber spring.
15 is a view of another embodiment of the support member of the present invention.

Hereinafter, a shock absorber for sliding door according to an embodiment of the present invention will be described in detail with reference to the accompanying drawings.

The shock absorber for a sliding door of the present invention is employed in a sliding door 10, such as a single sliding door, as shown in FIG. 2 to prevent the impact applied to the door frame 20 or the shock absorber 1 itself when the sliding door 10 is closed. Absorption and relaxation bar, as shown in detail in Fig. 2A and Figs. 3 to 4, the first fixing body 3, the second fixing body 6, the support member 21, the cylinder 25, It comprises a rotating hanger 23, a pivot connector (7), a buffer spring (8), and a door closing spring (27).

The first fixing body 3 is fixedly coupled to a point in the upper door frame 20, and as shown in FIGS. 2 and 3, through a first fixing plate 11 fitted and fixed to the upper door frame 20 It is fixed within 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 and fixed in the fixing groove 12 extending in the moving direction of the door leaf 30 along the inner wall of the upper door frame 20, that is, in the longitudinal direction.

In addition, as shown in Figs. 2 to 4, the first fixing body 3 is a pair of symmetrical to each other and extending in the longitudinal direction so as to support the support member 21 to be described later so as to be movable in the longitudinal direction. It includes a rail bar 13 and a fastening plate 15 for tying the ends thereof together. At this time, the fastening plate 15 is bent in a shape of a shape and is detachably coupled to the first fixing plate 11 by a fastening screw or the like.

Moreover, the first fixture 3 is a bar extending in the longitudinal direction at the upper and lower inner corners of the rail bar 13, respectively, as shown enlarged to B in FIG. The protrusions 17 and 18 insert the guide blades 33 of the support member 21 into the gaps generated therebetween to guide the movement of the support member 21 in the longitudinal direction more stably.

The second fixture 6 is spaced apart from the first fixture 3 and is fixedly coupled within the upper door frame 20, and can be fixed to the upper door frame 20 in various ways, and is bent with the fastening plate part 61 It has a part 62.

The fastening plate part 61 is a part that fixes 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 part 62 is a part that is bent in an a shape at one side of the fastening plate part 61, and the bent part supports one end of the buffer spring 8 to be described later, and one end of the cylinder housing 29 is fitted. A hole 63 is formed so that it can be lost. Reference numeral 45 denotes a bushing into which one end of the cylinder housing 29 is fitted.

The support 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, and may be formed in various forms, as an example of FIG. 4. As shown, the support member body 31 constituting the body of the support member 21, a guide portion 35 and a seating portion 36 are provided.

The support member main body 31 is a part that supports the cylinder 25 to be installed therein, and may be formed in various forms, as an example of which is made of a body having a semi-cylindrical shape that is completely overturned as shown in FIG. And guide blades 33 are formed extending in the longitudinal direction at the lower ends of each of the left and right sides of the body. Accordingly, the support member 21 is supported so as to be able to move forward and backward along the gap between the guide projections 17 and 18 formed on the first fixture 3 through the guide blades 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 the point where 1/3 has elapsed, but from thereafter to the seating portion 36 of the front end A guide portion 35 is formed that penetrates up and down and extends in the longitudinal direction. Reference numerals 38 and 39 denote a fixing piece and a screw hole for supporting the cylinder 25 to be movable along the upper door frame 20 by the support member body 31.

In the above description, the support member main body 31 has been described as consisting of a body having a semi-cylindrical shape that is overturned, but in addition to the above shape, the support member main body 31 may be in any shape as long as it is capable of supporting the cylinder 25. It is also possible, and as an example, it may be formed as a body having a hole 34 through which the cylinder 25 can pass, as shown in FIG. 15. Reference numeral 49, which is not described, is a fitting portion for allowing the body to move along the upper door frame 20 by fitting one end of the body shown in FIG. 15 into the fixing groove 12 formed inside the upper door frame 20.

The guide part 35 is formed to be penetrated in the longitudinal direction inside the main body 31 so that the rotating hanger 23 to be described later can move, and inside both side walls of the rotating hanger 23 as shown in FIG. Guide rails 37 that allow movement only in the longitudinal direction are formed, and a pair of guide wings 33 are formed outside both side walls as shown in FIG. 4, and the guide wings 33 are the first fixing bodies. It is possible to move forward and backward along the gap between the guide projections (17, 18) formed in (3).

The seating portion 36 is formed at the front end of the guide portion 35 to allow the rotating hanger 23 to seat on the front end of the guide portion 35 when the rotary hanger 23 reaches the line unit value. As shown in 7, the groove is formed in a portion from the tip of the guide portion 35 toward the bottom, so that when the rotation hook 23 is located at the tip of the guide portion 35, the rotation hook 23 A part is inserted into the seating portion 36 so that it can be tilted upward. However, for this purpose, the seating portion 36 gradually increases the front end of the guide rail 37 extending from the guide portion 35 toward the front along the inner circumferential surface to form an upwardly inclined inclined rail 39.

The cylinder 25 is installed by being supported by a support member 21 between the first fixing body 3 and the second fixing body 6, and at the tip of the rod 53 of the cylinder 25, 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 elongated along the guide portion 35 of the support member 21 when the door 30 is moved, and when the door 30 is closed, the cylinder The rod 53 of (25) is located 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 rotating hanger (23). It is gradually elongated with the movement, and when the rotating hanger 23 reaches the seating portion 36 of the support member 21, the rotating hanger 23 is the second protrusion 41 as indicated by the arrow E in FIG. As is rotated upward, it 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 rotating hanger 23 is coupled to the front end 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 rotating hanger 23 is an impact protrusion. With the impact of 72, the rod 53 of the cylinder 25 is contracted while rotating as indicated by the arrow F in FIG. 11, and when the door 30 is opened, the rotating hanger 23 is the rod of the cylinder 25 When the rotating hanger 23 reaches the seating portion 36 of the support member 21 while elongating 53, the rotating hanger 23 is rotated as indicated by the arrow E in FIG. As such, the door 30 is opened, and 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 It includes (48).

The hanger body 40 forms the body of the rotating hanger 23, is formed to be movable along the inside of the guide part 35, and may be formed in various forms, as shown in FIG. 6 as an example, as a whole. It can take the form of a triangular hook.

The coupling part 44 is formed on one side of the hook body 40 so that the front end of the rod 53 of the cylinder 25 is coupled, and the hook body 40 can be inclined by a hinge action at the tip of the cylinder 25. It is formed as a circular hole so that the hook body 40 can be inclined vertically with respect to the coupling portion 44.

The first protrusion 42 is protruding from the lower portion of the hanger body 40, and when the door leaf 30 is switched from the open position to the closed position, the impact protrusion 72 contacts to guide the hanger body 40 It is to be moved along the part 35.

The second protrusion 41 is formed protruding apart from the first protrusion 42 at the bottom of the hook body 40, and when the door leaf 30 is switched from the closed position to the open position, the impact protrusion 72 is In contact, the hanger body 40 is moved along the guide part 35.

Between the first protrusion 42 and the second protrusion 41, a receiving portion 43, which is a space in which the impact protrusion 72 can be accommodated, is formed, and the first protrusion 42 and the second protrusion 41 are formed. When the facing surface has a substantially vertical shape, the effect of the impact protrusion 72 pressing the first protrusion 42 and the second protrusion 41 can be further improved.

The first protrusion 42 and the second protrusion 41 each have a protruding surface 46 protruding from the hanger body 40 as shown in FIG. 6, and the protruding surface 46 is a hanger body ( 40) is prevented from being lifted upwards.

The spring engaging part 48 is formed on the upper part of the hanger body 40, and the door closing spring 27, which will be described later, is protruded to be connected to the hanger body 40, so that the door closing spring 27 when the door leaf 30 is closed. As a part that allows the hanger body 40 to be moved along the guide portion 35 by, it may be formed in various shapes, and as an example, as shown in FIG. 6, the upper portion of the hanger body 40 When formed by protruding in the direction of both sides of the door and bending a part of it, the door closing spring 27 is caught in the bent part when the door closing spring 27 is hooked, so that the door closing spring 27 is stably spring-engaged. 48).

On the other hand, the rotating hanger 23 may further include protrusions 45 that are symmetrically protruded on both sides of the hanger body 40, and the protrusion 45 has a rotating hanger 23 along the guide part 35. As to be able to be guided, as shown in FIG. 6, the first protrusion 42 and the second protrusion 41 protrude so as to extend in the longitudinal direction above each of the upper portions.

Therefore, when the rotating hanger 23 is impacted by the impact protrusion 72 at a line unit value 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 rotating hanger 23 and the protruding part 45, the rotating hanger 23 is the guide rail 37 of the guide part 35 It is constrained to do only linear motion along the longitudinal direction.

The pivot connector 7 is mounted on the upper side of the door leaf 30 so that the door leaf 30 moves along the upper door frame 20, and the door leaf 30 is moved along the upper door frame 20 in the center. A hole 71 into which a pivot pin (not shown) is inserted is formed, and both sides are in the moving direction of the door leaf 30 along the inner wall of the upper door frame 20, that is, in the longitudinal direction, as shown in FIG. A guide protrusion 73 for being inserted into the extended fixing groove 19 to be guided is formed.

In addition, at one point of the pivot connector (7), when it comes into contact with the rotating hanger (23), an impact protrusion that gives an impact to the rotating hanger (23) so that the rotating hanger (23) moves along the support member (21). 72 is formed.

The impact protrusion 72 is to directly transmit the impact due to the opening and closing of the door 30 to the first protrusion 42 or the second protrusion 41 of the rotating hanger 23, and the impact protrusion 72 is a rotating hanger When it comes into contact with the first protrusion 42 or the second protrusion 41 of (23), the rotation hook 23 also moves in the direction in which the impact protrusion 72 moves.

The cushioning spring 8 is deformed by the impact of the impact protrusion 72 when the impact protrusion 72 exerts an impact on the rotating hanger 23 when the door 30 is closed, thereby reducing the impact of the impact protrusion 72 As for buffering, it may be installed in various forms, and as an example, as shown in FIGS. 3 and 4, it may be installed by being fitted to the outer periphery of the cylinder housing 29.

The cylinder housing 29 is fitted with a cylinder 25 inside and a buffer spring 8 fitted on the outer periphery, and includes a housing body 58 and a spring seat 59.

The housing body 58 is formed of a hollow cylindrical body so that the cylinder 25 can be inserted, and a buffer spring 8 is fitted on the outer circumference, and one end is a bent portion of the second fixing body 6 When the cushioning spring 8 is contracted by being inserted into the hole 63 formed in the 62, the housing body 58 passes through the hole 62, thereby buffering the impact caused by the impact protrusion 72. .

The spring seat 59 is protruding from one end of the housing body 58 to elastically support one end of the buffer spring 8.

Therefore, the buffer spring 8 has one end supported by the second fixing body 6, and the other end is in contact with the spring seat 59 formed at one end of the cylinder housing 29, so that the spring seat 59 and the second high It is elastically installed between the stagnation (6), and when the door (30) is closed, when the rotating hanger (23) moves in the direction of the second locking member (6), the shock applied to the rotating hanger (23) is applied to the spring seat (59). ) Is transmitted to the cushioning spring 8, so that the cushioning spring 8 expands and contracts, and at the same time, it is possible to mitigate the impact applied to the door frame.

The door closing spring 27 is to gradually position the door leaf 30 in the door closed position while contracting when the impact protrusion 72 exerts an impact on the rotating hanger 23, one end of which is the rotating hanger 23 ) Is caught in 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 the door closing springs 27 form a pair and are arranged one by one on the left and right of the rotating hanger 23, and two of the door closing springs 27 are placed on the left and right of the rotating hanger 23 as above. When arranged, when the rod 53 of the cylinder 25 is contracted, it can be contracted in a balanced state without being biased to one side.

In addition, the door closing spring 27 has been described as being supported at one point of the second fixing member 6 in the above description, but one end of the door closing spring 27 is a point of the second fixing member 6 It does not necessarily need to be supported on, and may be supported at an arbitrary point inside the upper door frame 20.

When explaining the operation of the shock absorber for sliding door according to a preferred embodiment of the present invention as described above is as follows.

The shock absorber for sliding door of the present invention is installed at one end of the upper door frame 20 or a door structure having the same function, for example, as shown in FIG. 2, when it is installed at the rear end of the upper door frame 20, it is closed. It mitigates or absorbs the shock applied to the upper door frame 20 or the sliding shock absorber 1 due to the collision with the door 30.

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

First, in the door closed state, the shock absorber 1 for sliding doors is in a state in which the rod 53 of the cylinder 25 is maximally contracted to the rear end, that is, the impact protrusion by the rotating hanger 23 Along with 72, the door 30 is in a state that is retracted to the maximum, and thus the door 30 contacts 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 to start opening the door, the pivot connector 7 moves together with the door 30, while the impact protrusion 72 and the rotation hook 23 Moves to the right and reaches the line unit value shown in FIG. 8. At this time, the rod 53 and the door closing spring 27 of the cylinder 25 are extended to the maximum. Soon after, due to the continued advancement of the pivot connector 7, the rotating hanger 23 has the second protrusion 41 ascending along the inclined rail 39 shown in FIG. 7, as shown in FIG. The hinge pin 55 of 25) is inclined while rotating in the upward direction. Accordingly, the impact protrusion 72 released from the receiving portion 43 moves to the right away from the load of the door closing spring 27 and the cylinder 25, and as shown in FIG. 10, the pivot connector 7 is It is separated from the rotating hanger 23, and the door 30 is opened. In addition, even if the external force caused by the impact protrusion 72 is removed, the rotating hanger 23 is accommodated in the seating portion 36 of the support member 21 as shown in FIG. 7. By locking, despite the restoring force of the door closing spring 27, it is positioned in the seating portion 36 of the support member 21 as it is.

In this state, when the user moves the door leaf 30 backward to the left of FIG. 10 to start closing the door, the impact protrusion 72 is rotated that was opened during the upper door opening process when it reaches the line unit value as shown in FIG. A collision with the first protrusion 42 of the hook 23 is initiated. However, the user's door closing operation is assumed to be pushed by applying a force to the door closing position at once, rather than holding the door 30 and continuously moving backward. Accordingly, the rotating hanger 23 is inclined in the downward direction of FIG. 11 and is parallel to the guide portion 35 as shown in FIGS. 8 and 12. Thereafter, the rotating hanger 23 is subjected to a backward impact by the impact protrusion 72 of the pivot connector 7 and is pressed backward by the restoring force of the door closing spring 27.

In this way, the impact force in the reverse direction applied to the rotating hanger 23 initially by the impact protrusion 72 is transmitted to the cylinder 25 through the rotating hanger 23, thereby contracting the rod 53 of the cylinder 25 (25) It moves itself backward with respect to the support member (21). At this time, the cylinder 25 reverses the rod 53 of the cylinder 25 at an ultra-low speed due to internal resistance, whereas the rear end of the cylinder 25 is blocked by the cylinder housing 29, and thus the cylinder housing 29 ) And starts to compress the buffer spring (8) through the cylinder housing (29) momentarily. At this time, the support member 21 moves rearward almost simultaneously with the rotation hanger 23 and the cylinder 25 due to friction with the rotation hanger 23 and the cylinder 25.

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

Then, as shown in FIG. 13, when the buffer spring 8 is compressed to the maximum, the moving body 5 can no longer move backward along the rail bar 13, reaching the rear dead center, and then the buffer spring ( The cylinder housing 29 and the support member 21 move forward as shown in FIG. 14 by the repulsion of 8). However, even at this time, the door 30 and the impact protrusion 72 still maintain reversing, so at this time, the rod 53 of the cylinder 25 begins to contract in earnest.

Thereafter, the rotating hanger 23 continuously moves backward by the door closing spring 27 and pulls the impact protrusion 72 to the door closing position at a relatively slow speed, and finally, the door leaf 30 is moved to the door closing position. It is positioned, and as a result, the door 30 is closed, and the above operation is repeated every time after opening and closing.

1: shock absorber for sliding door 3: first fixture
4: second fixture 7: pivot connector
8: buffer spring 20: upper door frame
21: support member 23: rotating hanger
27: door closing spring 30: door leaf

Claims (4)

A first fixture 3 fixedly coupled within the upper door frame 20;
A second fixture (6) spaced apart from the first fixture (3) and fixedly coupled within the upper door frame (20);
A support member (21) installed between the first fixture (3) and the second fixture (6);
A cylinder (25) supported by the support member (21) and installed between the first fixture (3) and the second fixture (6);
A rotation hook 23 coupled to the front end 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 leaf 30 so that the door leaf 30 moves along the upper door frame 20, and when it comes into contact with the rotation hanger 23 at one point, the rotation hanger 23 is impacted. A pivot connector (7) having an impact protrusion (72) that allows the rotation hook (23) to move along the support member (21);
When the door 30 is closed, when the impact protrusion 72 exerts an impact on the rotating hanger 23, it is deformed by the impact of the impact protrusion 72 and buffers the impact caused by the impact protrusion 72 A buffer spring (8); And
When the impact protrusion 72 exerts an impact on the rotating hanger 23, a door closing spring 27 for retracting and placing the door 30 in the door closing position; characterized in that it comprises a. A shock absorber for sliding doors. The method according to claim 1,
The support member 21,
Support member main body 31 constituting the body;
Guide rails 37 that are formed to penetrate the body 31 in a longitudinal direction so that the rotating hanger 23 can be moved, and allow movement of the rotating hanger 23 only in the longitudinal direction on both side walls. The formed guide portion 35; And
A seating portion 36 formed at the front end of the guide portion 35 to allow the rotary hook 23 to be seated on the front end of the guide portion 35 when the rotary hook 23 reaches a line unit value; A shock absorber for sliding doors comprising a. The method according to claim 2,
The rotating hanger 23,
A hanger body 40 forming the body of the rotating hanger 23 and movably formed along the inside of the guide part 35;
A coupling portion 44 formed on one side of the hook body 40 so that the front end of the rod 53 of the cylinder 25 is coupled;
It is protruding from the lower portion of the hanger body 40, and when the door panel 30 is switched from the open position to the closed position, the impact protrusion 72 comes into contact with the hanger body 40 to the guide part ( A first protrusion 42 to be moved along 35;
When the first protrusion 42 and the protrusion are formed at the bottom of the hook body 40 to be spaced apart from the first protrusion 42, when the door panel 30 is switched from the closed position to the open position, the impact protrusion 72 contacts the A second protrusion 41 for moving the hook body 40 along the guide part 35; And
It is formed on the top of the hook body 40 so that one end of the door closing spring 27 is coupled, and when the door closing spring 27 contracts when the door 30 is closed, the hook body 40 A shock absorber for sliding doors comprising: a spring-engaged portion (48) configured to move along the guide portion (35). The method according to claim 1,
The cylinder 25 is fitted inside, and further comprises a cylinder housing 29 for elastically installing the buffer spring 8 outside,
The cylinder housing 29 is
A housing body 58 into which the cylinder 25 is inserted and a buffer spring 8 is fitted to the outer periphery;
A shock absorber for sliding doors comprising: a spring seat 59 protruding from one end of the housing body 58 to support elasticity of one end of the buffer spring 8.

Images