KR101907394B1 - Folding windows - Google Patents

Abstract

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a vertical folding type outdoor window having a bar function, and more particularly, A lower window that is hingedly coupled by a hinge engaging part formed at the lower end of the window; The upper and lower ends of the upper window and the lower window are pivoted about the hinge engaging part when the lower window is moved up and down, and the vertical window of the lower window is opened by the operation of protruding inward or outward, .
Therefore, when the window made of a heavy body is opened and closed in the vertical direction, the upper window of the window can be made to function as an ornamental shield for blocking sunlight and rainwater. In particular, So that the upper window is prevented from being warped and maintained stably open, and the lower window is pressed downward by a force not larger than the weight of the upper window, or the same or relative to the upper window, The present invention provides a vertical folding outdoor window having a bar function that smoothly and smoothly opens and closes even with a user's small force by pressing the upper and lower windows upward with a large force to maintain the balance of force.

Description

{FOLDING WINDOWS} Vertical folding door with bar function

The present invention relates to a vertical folding type outdoor window having a bar function. More particularly, the present invention relates to a vertical folding outdoor window having an upper window and an upper window, in a state in which an upper window and a lower window are hinged to the inside of upper and lower horizontal frames and left and right vertical frames, And the upper windowpane can be opened while being pivoted to the outside so that the two windowpanes positioned above and below are shifted in the oblique direction corresponding to each other when they are opened so that the hinge coupling part protrudes outward, And the triangular opening and closing sections are secured to increase the ventilation area while preventing falling down. The lower window formed with the oblique surface has the function of the arm base, and the problem of eccentricity and failure due to the increase in the size of the window The present invention relates to a vertical type folding outside window having a bar function.

The window system installed in the building is installed not only for the purpose of ventilation but also for the purpose of allowing the outside scenery to be viewed from the inside. In particular, in the case of a café, a restaurant, an office building and a structure for enhancing the appearance of the building, The system is introduced more and more, and the building is built with good view of the surrounding landscape and the view from the inside as well as the exterior.

For the purpose of the present, curtain walls (fixing windows), which are mostly made of glass, are generally used for the majority of the high-rise building envelope, and pivoting windows are generally applied for ventilation thereof.

A curtain wall is a standardized non-proof partition wall installed on an outer wall. Currently, partition walls are installed in combination with a transparent or colored glass frame to enhance exterior view and lighting.

Most of the curtain walls described above are installed in a fixed shape, and it is difficult to ventilate the interior of the building. In particular, since the radiant heat in the summer heats the interior of the building through the glass and the heated air can not be discharged to the outside, There have been various problems such as an increase in electricity charges and management expenses.

In order to solve this problem, a pivot transverse window is generally applied.

However, the above-mentioned window is miniaturized and applied for the safety of the user, and the opening amount is also formed by only triangular-shaped opening, which has a small ventilation amount, and is very vulnerable to elimination of the greenhouse effect of the room due to the curtain wall fixing window.

In addition, the window is solved by a method of reducing the eccentricity by additionally attaching a separate bar or limiting the opening size, i.e., the rotation distance, so as to prevent the window from moving away from the axis. As a result, the ventilation area is being further reduced.

1 and 2 are diagrams showing a conventional curtain wall in which a lower end is fixed by a hinge shaft 10 and an upper end thereof is turned to open a window 20. [

1 and 2 show a state in which the upper part is open. Therefore, when the window 20 is opened in a rainy period, the rain is introduced into the room, so that the window 20 can not be opened during rainy weather. Since the bar 12 of the flat-topped structure is hinged to both sides of the window 20, when the window 20 is heavy, the weight can not withstand the load, so that the hinge portion 12 is distorted or deformed, There is also a structural problem in that when the curtain wall full load or the building itself is structurally distorted or deformed, operational problems arise in the hinge portion 12.

3 shows that the upper end of the window 20 is fixed by the hinge shaft 10 and the lower end of the window 20 is opened while being pivotally opened. In FIG. 3, a bar 10 of a relatively thin flat structure is hinged to both sides of the window 20 The hinge portion 12 can not withstand the load when applied to the window 20 made of a heavy material, so that the hinge portion 12 is twisted or deformed to cause noise, and when the building is deformed or the window frame is twisted, It is not suitable for the weight window 20.

In order to solve the above-mentioned problems, according to the present invention, a window is opened in an upward direction, and when an upper window is opened in a weighted state, a lower window folded at the lower end of the upper window supports the load of the upper window, In particular, it is possible to smoothly use a window made of a heavy body by maintaining a balance of force that reduces the load burden on the window so that the opening and closing operations can be smoothly performed even with a small force. In particular, The present invention provides a folding vertical movable window having a bar function for solving the problems of safety accidents such as falling down of human life while forming more openings through the opening of the triangular shape as well as the triangular opening as compared with the pivoted window having the opening size of There is a purpose.

The above object is achieved by a hinge coupling of an upper window 112 to an upper inside of an upper horizontal frame 102 or an upper inside of a side vertical frame 106 and a lower window 114 A foldable window 120 having a hinge-engaging portion 121 formed to be pivotably hinged; The upper end of the lower window and the lower end of the lower window are rotated about the hinge engaging part 121 to be protruded outward and then stopped to be held while the load of the upper window 112 is increased due to the upward and downward movements And a load-reducing means for lowering the height of the upper window and the window for lowering the height of the lower window.

The load lowering means of the upper and lower window mirrors is installed and fixed inside the side vertical frame 106 so that the guide protrusion 122 protruding from both ends of the lower portion of the lower window 114 can be guided upward A guide member 124 having a guide hole 124a formed therein; And a fixing member 129 for fixing a lower window 114 which is raised and lowered from the inside of the side vertical frame 106 upward.

The fixing member 129 includes at least one fixing hole 124b which is formed horizontally or diagonally downward in the guide hole 124a so that the guide protrusion 122 is seated.

The upper and lower webbing load relieving means are installed and fixed inside the side vertical frame 106 so that the guide protrusion 122 protruding from both lower ends of the lower webbing 114 can be guided upward A guide member 124 having a guide hole 124a formed therein; At least one fixing hole (124b) formed horizontally or diagonally downward in the guide hole (124a) to seat the guide protrusion (122); A connection part 126 formed on at least one of both ends of the lower window 114; And a shock absorber 128 rising from the inside of the vertical frame 106 and having an end of the piston rod 128a connected to the joint 126.

The above-mentioned object can be attained by providing an upper window frame 112 rotatably hinged to an upper inside of an upper horizontal frame 102 or an upper inside of a side vertical frame 106 and a lower window mirror 114 A foldable window 120 having a hinge-engaging portion 121 formed therein so as to be rotatable; A guide bar 130 rotatably hinged to the lower end of the lower web 114; A worm wheel 132 coupled to the inside of the frame of the guide bar 130 and rotating when an external force is applied; A worm shaft 136 extending from both ends of the worm gear 134 orthogonal to the worm wheel 132 toward both ends of the guide bar 130 and rotatably fixed to both ends of the guide bar 130; A razor piece 138 formed to be longitudinally fixed from the inside to the top of the vertical frame 106; A lifting gear 140 coupled to both ends of the worm shaft 136 and meshed with the rack gear 138 to move up and down along the rack gear 138 when the worm shaft 136 rotates, The present invention is also achieved by a vertical folding outside window having a bar function.

A guide roller 142 rotatably and axially coupled at both ends of the worm shaft 136; And a support portion 144 (not shown) which is fixed upright from the inside to the upper side of the vertical frame to support the repulsive force of the up-and-down gear 140 engaged with the rake- ). ≪ / RTI >

The above-mentioned object can be attained by providing an upper window frame 112 rotatably hinged to an upper inside of an upper horizontal frame 102 or an upper inside of a side vertical frame 106 and a lower window mirror 114 A foldable window 120 having a hinge-engaging portion 121 formed therein so as to be rotatable; The upper and lower window sets 112 and 114 are pressed upward by a force equal to or relatively larger than a force acting downward by the load of the upper and lower window sets 112 and 114 to maintain a balance of force The balance member 146 is provided on at least one of the side surface of the side frame vertical frame 106 and the upper and lower window frames 112 and 114 so that the balance member 146 is in an equilibrium state It is preferable to maintain the state of holding stop).

The balance member 146 may be an elastic member that stands upright on the side surface vertical frame 106 and exerts upward or downward elastic force with a force corresponding to the load of the upper and lower window frames 112 and 114 148); And a connection cord 150 connected to an end of the elastic member 148 and a side of the lower window 114.

It is also preferable that a direction switching unit 152 is provided on the connection cord 150 and switches the direction of the force upward or downward by the elastic member 148 downward or upward.
The balance member may utilize an expanding force or a contracting force of the elastic member 148 formed of at least one of a spring, a leaf spring and an elastic strand. The elastic member 148 may be connected to the elastic member 148, It is preferable to further include a connection cord 150 for securing a longer travel distance.

In the present invention, when the upper window and the lower window are hinged on the inside of the horizontal and vertical frames and only the upper window is hinged to the upper horizontal frame to raise and lower the lower window, the upper window and the lower window are folded outward, When the window is opened, the upper window acts as an ornamental shield for blocking sunlight and rainwater. When opening the window, the lower window of the upper window made of a weight is supported and supported, and the upper window is bent And the lower window is pressed downward by a force not greater than the weight of the upper window so that the lower window can be smoothly and smoothly raised and lowered by applying only a small force, The opening and closing operation can be performed and the opening area can be increased, And yet obtain the ventilation effect has the effect that constitute the safe use and prevent accidents such as the crash of a problem of life in advance.

In addition, by pressing the upper and lower windowpanes upward by the same or relatively large force as the load of the upper and lower windowpanes, the upper and lower windowpanes are kept in equilibrium with the force to be closed by their own weight, And a state maintaining attribute for maintaining the operation and the open / close state, thereby providing a simple and easy operation.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing a bottom-up opening state of a conventional window. Fig.
Fig. 2 is a longitudinal sectional view of Fig. 1; Fig.
3 is a longitudinal sectional view showing a top-down opening state of a conventional window.
4A is a longitudinal sectional view showing a closed state of the first embodiment according to the vertical folding type outdoor door having the arm function of the present invention.
FIG. 4B is a view showing a state immediately before the lower window of the first embodiment according to the vertical folding outside window having the arm function of the present invention is raised and lowered and fixed. FIG.
4C is a view illustrating a state in which the lower window of the first embodiment according to the vertical folding type outdoor window having the arm function of the present invention is lifted and fixed.
FIG. 5A is a projection view showing a structure inside a front frame and a vertical frame of a window showing a modified embodiment of the second embodiment according to the vertical folding outside window having the arm function of the present invention. FIG.
FIG. 5B is a projection view showing a structure inside the front and vertical frames of a window showing a modified embodiment of the second embodiment according to the vertical folding outside window with the arm function of the present invention. FIG.
FIG. 6 is a view showing an additional configuration for facilitating the vertical folding type outdoor door having the arm function of the present invention. FIG.
FIG. 7 is a front view of a third embodiment according to a vertical folding outside window with a function of the present invention; FIG.
8 is a side cross-sectional view of a third embodiment according to a vertical folding outside door having a function of an arm of the present invention.
FIG. 9A is a projection view (closed state) showing a structure inside the front and vertical frames of the fourth embodiment according to the vertical folding type outdoor window having the arm function of the present invention. FIG.
FIG. 9B is a projection view (open state) showing the structure inside the front and vertical frames of the fourth embodiment according to the vertical folding outside window with the arm function of the present invention. FIG.
FIG. 10A is a fourth embodiment of the predicted plane action (closed state) according to the vertical folding outdoor window having the arm function of the present invention. FIG.
FIG. 10B is a fourth embodiment of the predictive plane action diagram (open state) according to the vertical folding outdoor window having the arm function of the present invention. FIG.
Fig. 11A is a partially exploded perspective view clearly showing components for the balance member in Fig. 10B. Fig.
11B is a view showing a case in which a leaf spring is applied to a balance member according to a vertical folding type outdoor window having an arm function of the present invention.

The configuration and operation of the present invention will be described with reference to FIGS. 4A to 11B.

A vertical frame 106 is connected to both ends of the upper and lower horizontal frames 102 and 104 to constitute a conventional window frame 110 do.

The upper window 112 is pivotably hinged to the upper side of the upper horizontal frame 102 or the upper side of the inner side of the side wall of the vertical frame 106. At the lower end of the upper window 112, 114 are hinged by a hinge or the like to form a hinge engaging portion 121 so that the upper window 112 and the lower window 114 can be folded about the hinge engaging portion 121. [

4A and 4B, when the left side in the figure is the outdoor direction and the right side in the drawing is the indoor direction, the hinge joint portions 121 of the upper window 112 and the lower window 114 The upper window 112 can be pivoted outdoors when the folding window 120 is opened as shown in FIG. 4C.

In the present invention, when the lower window bar 114 is raised and lowered and the lower end of the upper window bar 112 and the upper end of the lower window bar 114 are rotated around the hinge engaging part 121, The upper and lower window mirrors 112 and 114 protrude outwardly and then stop to be maintained. The first to fifth embodiments of the present invention are shown in FIGS. 4A to 10B. Referring to FIG.

≪ Embodiment 1 >

In the first embodiment, guide projections 122 are protruded inwardly from the vertical frame 106 as shown in FIGS. 4A and 5A, respectively, at both side ends of the lower window assembly 114, A guide member 124 having a guide hole 124a extended upward is installed and fixed along the guide hole 124a in a state where the guide protrusion 122 is inserted into the guide hole 124a of the guide member 124 So that it can be lifted up and down.

Here, in the lifting operation of lifting up the lower window bar 114, the upper window bar 112 is kept opened only when the lower window bar 114 is maintained in a stopped state at a desired position. In the first embodiment, A holding member 129 for holding the holding state of the holding member 114 is provided.

The fixing member 129 described above is achieved by causing an interference action to occur in the guide protrusion 122 that ascends and descends along the guide hole 124a. As shown in FIG. 4A, when the lower window 114 is in a lowered state When the lower window barrel 114 is lifted up to the upper side in a state where the lower window barrel 120 is in the closed state, the guide protrusion 122 moves up and down along with the lower window bar 114 along the guide hole 124a.

4A and 4B, grooves having the same size as the outer diameter of the guide protrusion 122 are extended from the lowermost end to a predetermined distance from the upper end of the guide hole 124a, It is preferable to enlarge the protrusion 122 so that the protrusion 122 can be slightly moved to one side or the other side, thereby forming a larger size.

4A, when the guide protrusion 122 is lifted and lowered, the lower window set 114 is slightly pulled toward the interior direction, and the guide protrusion 122 is guided by the fixing hole 124b formed in the guide hole 124a, Is inserted and seated, so that the lower window frame 114 can be fixed.

4C, when the guide protrusion 122 of the lower window bar 114 is inserted into the fixing hole 124b of the guide member 124 as described above, the upper window bar 112 and the lower window bar 114, Is folded in a state protruding toward the outdoors direction, the upper window 112 can function as an ornamental shield for blocking rainwater and preventing sunlight.

In particular, the folding window 120 opened from the state of FIG. 4A to the state of FIG. 4C is opened from the state of FIG. 4A to the state of FIG. 4B, and the lower window 112 of the upper window 112, The lower window bar 114 functions as a bar for stably supporting and supporting the load of the upper window bar 112 in a state where the lower window bar 114 is hinged to the upper end of the lower window bar 114, It is possible to prevent the frame from being twisted or deformed.

The guide protrusion 122 that is seated on the fixing hole 124b comes out of the fixing hole 124b and descends from the guide hole 124a, Closing operation of the window 120 is made simpler and easier.

≪ Embodiment 2 >

In general, when the upper window 112 and the lower window 114 are heavy, excessive force may be exerted when lifting the lower window 114. When the folding window 120 is closed, A large noise may be generated, or an impact may be applied to the folding window 120, which may damage the window.

The second embodiment has been proposed in order to solve the problems that may occur when the upper and lower window mirrors 112 and 114 are heavy bodies as described above and it is possible to reduce the load of the upper window 112 and the lower window 114 And a means for providing a balance member for allowing the opening / closing operation to be performed more smoothly.

5A and 5B, a shock absorber 128 is provided as an example of the above-described balance member on the inside of the vertical frame 106, and the piston rod 128a of the shock absorber 128 is fixed to the lower The piston rod 128a of the shovel 128 is connected to a connection portion 126 formed on both side surfaces of the window 114. The piston rod 128a of the shovel 128 is connected to a connecting rod 128).

In other words, if the total weight of the upper window 112 and the lower window 114 is 50 kg, the shovel 128 acts to lift up to 49 kg so that the load of the folding window 120 The lower window set 114 can be lifted and lowered even when the user applies only a force for lifting a weight of 2 kg and the lower window set 114 is lowered The user can smoothly close the lower window 114 only by holding down the lower window 114 with a force of 0.5 kg, so that the opening and closing operation of the window 120 can be performed stably and smoothly. It can be done.

Meanwhile, as shown in FIGS. 5C and 5D, the shock absorber 128 may be installed using a force that the piston rod 128a is to be introduced into the cylinder. At this time, the piston rod 128a, So that the lower window pane 114 can be easily pulled up.

As described above, the vertical folding type outdoor door frame having the bar function according to the present invention is not made up of the shoe 128 simply by canceling or reducing the load of the folding window 120, A structure (Fig. 11A) for canceling the weight by connecting the spring (Fig. 11B) and the elastic member 148 with the string using the principle of spring winding, which can be applied to the fourth embodiment to be described later, As described above, the 'C' type spring is connected to the lower end of the upper window 112 and the upper end of the lower window 114 to control the direction of the elastic force generated by the center point displacement of the 'C' The present invention is not limited thereto and can be variously changed and adopted.

5A and 5B, the piston rod 128a of the shawl 128 may be coupled to the lower window 114 by a connecting member, and the piston rod 128a of the piston rod 128a of the bobbin- And the structure may be variously changed depending on where the shovel 128 is installed in the upper part or the lower part of the vertical frame 106. Therefore, the present invention is not limited thereto, Structure can be adopted and changed.

4A, 4B and 6 illustrate a structure in which the lower window assembly 114 is moved up and down along the guide protrusion 122. However, as shown in FIGS. 7 and 8, The guide protrusion 122 and the connection portion 126 are formed on the guide bar 130 so that the guide bar 130 can be lifted up without being rotated, When the lower window barrel 112 and the lower window barrel 114 are rotated by the hinge connection, the lower window bar 114 can be rotated by the hinge connection with the guide bar 130, And it can be structurally guaranteed to be stable for a long time.

≪ Third Embodiment >

7 and 8, the folding type window 120 has an inner upper side of the upper horizontal frame 102 or an inner upper side of the side vertical frame 106, And a lower window bar 114 is rotatably hinged to a lower end of the upper window bar 112 to form a hinge engaging part 121. The lower window bar 114 is rotatably supported by the lower window bar 114, The guide bar 130 is hinged to the lower end of the guide bar 130 so that the guide bar 130 is lifted and lowered and fixed at a desired position when the guide bar 130 ascends and descends.

7 and 8, the worm wheel 132 is coupled to the inside of the frame of the guide bar 130, and the worm gear 134 is engaged with the worm wheel 134 so as to be orthogonal to each other.

At this time, it is preferable that the worm 133 is coupled to the worm wheel 132 so that the worm wheel 132 can be rotated by rotating the knob 133 as shown in FIG.

The worm shaft 136 is rotatably coupled to both ends of the guide bar 130 at both ends of the worm wheel 132. The worm shaft 136 is rotatably coupled to both ends of the guide bar 130 And raising and lowering gears 140 coupled to both ends of the worm shaft 136 are coupled to the upper and lower rails 138 and 138, respectively, The worm gear 134 and the worm shaft 136 rotate while the knob is rotated or the worm wheel 132 is rotated using separate power so that the lifting gear 140 rotates So that the lifting / lowering gear 140 can be lifted or lowered while being engaged with the rack gear 138.

A guide roller 142 is rotatably coupled to both ends of the worm shaft 136 so that the guide roller 142 is inserted into or held in close contact with the receiving portion 144, It is preferable that a stable up-down operation is performed by supporting the upward / downward gear 140 coupled with the upper / lower gear 138 when the repulsive force is applied thereto.

Accordingly, when the worm wheel 132 is rotated even when excessive force is not used by the user when opening and closing the upper and lower window bars 112 and 114 made of a heavy body, the folding type outer door can be opened and closed by a mechanical force So that stable use can be achieved.

<Fourth Embodiment>

The upper window frame 112 is rotatably hinged to the upper end of the upper horizontal frame 102 or the inner upper end of the side vertical frame 106 and the lower window mirror 114 is provided at the lower end of the upper window mirror 112, The folding window 120 is formed by forming the hinge-engaging portion 121 to be rotatably hinged to the hinge-engaging portion 121, which is the same as the first to third embodiments.

In the fourth embodiment, the opening and closing of the upper and lower windowpanes are facilitated, and in particular, the opening size can be freely adjusted. When the windowpane is opened, The balancing member is provided so that the force to close the window can be canceled so that the opened state or the closed state can be maintained as it is.

That is, the upper and lower window cans 112 and 114 are continuously operated to lower (lower) the upper and lower window cans 112 and 114 by their own loads, Accordingly, by giving the upper and lower window lifts 112 and 114 a lift force (upward pressure) equal or greater than the force that the upper and lower window lifts 112 and 114 act downward, The upper and lower window pads 112 and 114 and the balance member maintain the balance of force so that the upper and lower window pads 112 and 114 are maintained in the open state or the closed state, So that the upper and lower window mirrors 112 and 114 can be opened and closed by force.

As described above, the balance member 146 for maintaining the open state of the upper and lower window frames 112 and 114 as described above is disposed on the side of the vertical frame 106 on the side and the upper and lower window pairs 112 and 114 The elastic members 148 are erected in the side vertical frames 106 as shown in Figs. 9A to 11B to increase the load of the upper and lower window frames 112 and 114 (112 or 114) is elastically supported upward or downward by a force (same or a relatively large force) corresponding to the upper window 112 and the lower window 112. [

A connection cord 150 is connected to an end of the elastic member 148 and a side surface of the lower window 114 so that the elastic force of the elastic member 148 is transmitted to the lower window 114.

Here, the elastic force of the elastic member 148 acts as a pulling force from the lower portion to the upper portion so as to act as a force corresponding to the load of the upper and lower window scales 112 and 114. In some cases, The elastic member 148 may be provided so as to act as a force for pulling down from the upper portion to the lower portion. At this time, as shown in FIGS. 9A to 11B, It is preferable to switch the direction of the force to the direction of the force for pulling up from the lower part to the upper part.

10A to 11B, the direction switching unit 152 includes a lower roller 154 rotatable at an end of the elastic member 148 and a position spaced apart from the elastic member 148 by a predetermined distance, After the roller 152 is installed, the connection string 150 is wound on the upper roller 152 via the lower roller 154 and then connected to the lower window so that the direction of the force is switched to lift the lower window 114 It can be made to act as a force to raise.

Therefore, since the force corresponding to the load of the upper and lower window pads 112 and 114 is always applied to the upper and lower window pads 112 and 114 by the elastic member 148, The upper and lower window mirrors 112 and 114 can be lightly opened. Even if the upper and lower window mirrors 11209114 and 11209114 are positioned in the opened state as shown in FIGS. 9B and 11B, The lower window mirror (112) 9114) is maintained in the open state since the force is balanced by the elastic member (148).

102: upper horizontal frame 104: lower horizontal frame
106: vertical frame 110: window frame
112: upper window 114: lower window
120: folding window 121: hinge coupling part 121:
122: guide projection
124a: Guide groove 124b: Fixing hole
124: guide member 126:
128: Shoba 129: Fixing member
130: Guide bar 132: Worm wheel
134: Worm gear 136: Worm shaft
138: Ra size 140: Up and down gear
142: guide roller 144:
146: Balance member 148: Elastic member
150: connecting string 151:
152: upper roller 154: lower roller (erasure)

Claims (11)

An upper window 112 hinged to rotate at an upper end of the upper horizontal frame 102 or the side vertical frame 106;
A lower window 114 hinged to be rotatable by a hinge engaging part 121 formed at a lower end of the window 112;
When the lower end of the lower window barrel 114 is lifted up and lowered, the lower end of the upper window barrel 112 and the upper end of the lower window barrel 114 are rotated about the hinge engaging part 121, And the lower window bar 114 is moved up and down by the raising and lowering means of the lower window bar and the vertical frame 106 of the lower window bar 114 supports the load of the upper window bar 112;
Wherein the lifting means of the lower window-
A guide bar 130 rotatably hinged to the lower end of the lower web 114;
A worm wheel 132 coupled to the inside of the frame of the guide bar 130 and rotating when an external force is applied;
A worm shaft 136 extending from both ends of the worm gear 134 orthogonal to the worm wheel 132 toward both ends of the guide bar 130 and rotatably fixed to both ends of the guide bar 130;
A razor piece 138 formed to be longitudinally fixed from the inside to the top of the vertical frame 106;
A lifting gear 140 coupled to both ends of the worm shaft 136 and meshed with the rack gear 138 to move up and down along the rack gear 138 when the worm shaft 136 rotates, And a vertical folding type outer casing having a bar function. The method according to claim 1,
A guide roller 142 rotatably and axially coupled at both ends of the worm shaft 136;
And is fixed upright from the inside to the top of the vertical frame 106 in order to support the repulsive force of the lifting gear 140 engaged with the rack gear 138, (144), wherein the vertical folding outer casings have a bar function.
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