KR102175011B1 - Folding automatic door - Google Patents

Abstract

The present invention relates to a foldable type automatic door without a lower rail for opening and closing a passage and, more specifically, to a foldable type automatic door without a lower rail, which automatically drives a foldable type door with increased space utilization, thereby opening and closing a passage. The foldable type automatic door without the lower rail for opening and closing the passage comprises: a foldable type door including a post, an inner door of which one side is connected to the post to be rotatable, and an outer door connected to the other side of the inner door to be rotatable; a cylinder of which one side is connected to the post to be rotatable and the other side is connected to the inner door to be rotatable, and which is diagonally arranged with respect to the inner door; and a joint means connected to the outer door to rotate the outer door with respect to the inner door in accordance with driving of the cylinder.

Description

Folding automatic door without lower rail{FOLDING AUTOMATIC DOOR}

The present invention relates to a folding automatic door without a lower rail for opening and closing a passage, and more specifically, to a foldable automatic door without a lower rail that can open and close a passage by automatically driving a foldable door with increased space utilization. About.

The door is made up of a door leaf and a door frame, and is to open and close a passage through which one can enter an area.

In general, there are sliding doors, sliding doors, etc., but sliding doors require a space corresponding to the length of the door in which the sliding door can be arranged to open the passage, so it is relatively large compared to the size of the door. A door frame of the size should be installed.

On the other hand, the casement door does not need to be made larger by comparing the size of the door frame with the door like the sliding door, but it invades the space of the place where the door is installed by the rotation radius of the door leaf.

To compensate for the problems of sliding doors and sliding doors, folding doors (folding doors, folding doors) are adopted.The folding door is composed of two or more articulating panels that fold together when the passage is opened, and the door is folded, thereby invading the space. There is little, and in particular, since it does not require a separate space for placing the door like a sliding door, it is not necessary to manufacture the door frame larger than that of the door leaf.

Patent Publication No. 10-2017-0031368 (hereinafter referred to as the prior art), which is a conventional technology, relates to a folding door, and more particularly, a first door leaf 20, one end hinged to the door frame 10, and the first door leaf ( In the folding door consisting of a second door (30) hinged to the other end of 20), the first and second doors (20, 30) are opened or closed while being folded or unfolded; The hinged portion between the first and second doors 20 and 30 has an arc-shaped groove 23 and 33 laterally open to the vertical frames 22 and 32 of the first and second doors 20 and 30. A hinge frame 40 having a cross-section having a width smaller than the diameter of the circle is inserted in the first and second door panels 20 and 30, which are coupled so that two circles partially overlap, The upper and lower ends of the hinge frame 40 are pivotably pin-coupled to the upper and lower ends of the first and second doors 20 and 30, but at least one of the upper and lower ends of the hinge frame 40 is a pair of By providing the engaging gear 50 of the, the engaging gear is provided in the hinge coupling portion of the folding door made of a plurality of doors, so that the two doors open and close at the same angle, and these two doors It has the effect of maintaining the closed state stably while forming a straight line by engagement, and being able to reliably maintain the closed and open state since the two doors are folded until they are completely parallel even when opened.

However, the prior art related to such a folding door has a problem in that it is difficult to automatically open and close because neighboring doors such as sliding doors and swing doors are folded and rotated.

The present invention has been conceived to solve the above problem, and an object of the present invention is to provide a folding automatic door without a lower rail capable of automatically opening and closing the folding door.

In addition, an object of the present invention is to provide a folding automatic door without a lower rail capable of folding or unfolding the folding door only by a simple translational movement of a piston.

In addition, an object of the present invention is to provide a folding automatic door without a lower rail having excellent rigidity and improved aesthetics.

The present invention for the purpose of solving the above problems has the following configurations and features.

A folding door including a post, an inner door rotatably connected to the post, and an outdoor rotatably connected to the other side of the inner door, and one side to the post It is connected to be rotatable, the other side is rotatably connected to the inner door, and is connected to a cylinder disposed at an angle with respect to the inner door, and to the outdoor, so that the outdoor is connected to the inner door according to the driving of the cylinder. It includes a joint means for rotating against.

In addition, the joint means is rotatably connected to the rear of the inner door, the first node (node) portion connected to the other side than the point connected to the cylinder, a first node spaced apart by a first length from the first node portion. A cam member comprising a second node portion and a third node portion spaced apart by a second length greater than the first length in a direction forming an obtuse angle with the direction of the first length, one side is rotatably connected to the post, , Any one of the first link and both ends of which the other side is rotatably connected to the second node part is rotated to the third node part so that the other side has a greater separation distance from the longitudinal direction of the inner door than one side. It is possible to be connected, the other may include a second link rotatably connected to the rear of the outdoor.

In addition, the cam member may include a curved groove provided between the first node part and the second node part, an arch protrusion provided between the second node part and the third node part and protruding outward, and the first The first part and the first part provided between the node part and the third node part and bent inward in the direction of the second length, but bent inward so as to have a shape corresponding to one side of the inner door at the first node part A receiving groove including a second part bent inward to have a shape corresponding to a side surface of the inner door and the outdoor may be included in the three-node part.

The present invention having the above configuration and features includes a cylinder connected to the post and the inner door at an angle with respect to the inner door, and a joint means that is connected to the outdoor and rotates the outdoor to the inner door according to the driving of the cylinder. It has the effect that the door can be opened and closed automatically.

In addition, the present invention has the effect that the folding door can be folded or unfolded only by the translational movement of the cylinder by including the cam member, the first link and the second link.

In addition, in the present invention, the cam member includes a curved groove, an arch protrusion, and a receiving groove, so that external force is distributed to increase rigidity, and interference with the cam member is suppressed when the folding door is folded and unfolded. It has the effect of being accepted and improving the aesthetics.

1 is a front view of a folding automatic door without a lower rail according to an embodiment of the present invention.
2 is a plan view showing a folding automatic door without a lower rail in an open state.
FIG. 3 is a plan view illustrating a process of folding a folding automatic door without a lower rail in FIG. 2.
4 is a plan view showing a folding automatic door without a lower rail in a folded state.
5 is a plan view illustrating a process of unfolding a folding automatic door without a lower rail in FIG. 4.
6 is a diagram showing a further embodiment of the present invention.

The present invention will be described in detail in the text of the bar, implementation (態樣, aspect) (or embodiment) that can apply various changes and can have various forms. However, this is not intended to limit the present invention to a specific form of disclosure, it should be understood to include all changes, equivalents, and substitutes included in the spirit and scope of the present invention.

The terms used in the present specification are only used to describe specific embodiments (sun, 態樣, aspect) (or examples), and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In the present application, terms such as ~include~ or ~consist~ are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification, but one or more other features It is to be understood that the presence or addition of elements or numbers, steps, actions, components, parts, or combinations thereof, does not preclude in advance the possibility of being added.

Unless otherwise defined, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the present invention belongs. Terms as defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related technology, and should not be interpreted as an ideal or excessively formal meaning unless explicitly defined in this application. Does not.

The ~1~, ~2~, etc. described in the present specification will only be referred to to distinguish different constituent elements, and are not limited to the order of manufacture, and the names in the detailed description and claims of the invention It may not match.

Throughout the present specification, when a part is said to be "connected" with another part, this includes not only the case that it is "directly connected", but also the case that it is "indirectly connected" with another element interposed therebetween. do.

1 is a front view of a folding automatic door without a lower rail according to an embodiment of the present invention, FIG. 2 is a plan view showing a folding automatic door without a lower rail in an open state, and FIG. 3 is a folding without a lower rail in FIG. It is a plan view for explaining the process of folding the automatic door, FIG. 4 is a plan view showing a folding automatic door without a lower rail in a folded state, and FIG. 5 is for explaining the unfolding process of the folding automatic door without a lower rail in FIG. It is a plan view.

Hereinafter, a folding automatic door (AF) without a lower rail according to an embodiment of the present invention will be referred to as'this device' for convenience of description.

1 to 5, the device is for opening and closing the passage, and includes a folding door (1), a cylinder (2) and joint means (3).

The folding door 1 includes a post 11. The post 11 refers to a column whose lower part is buried underground and the upper part extends in the vertical direction from the ground (G). Here, the lower part means the lower part based on FIG. 1, the upper part means the upper part based on FIG. 1, and the vertical direction refers to the upper-lower direction based on FIG. 1.

Although it will be described in more detail in the following description, the post 11 may have an accommodation space in which a cable CA or the like may be embedded.

In addition, the folding door 1 includes an inner door 12 whose one side is rotatably connected to the post 11.

Here, one side refers to the side of the post 11, and the other side refers to a side facing the outer radial direction of the inner door 12 rotating around the post 11, and the same will be applied in the following description.

For example, the post 11 and the inner door 12 may be rotatably connected by a bracket BK and a pin PI in a pin-joint method.

At this time, the rotation means a rotation having a plane-bottom direction as a central axis with reference to FIG. 2, and the same will be applied in the following description.

In addition, the folding door 1 includes an outdoor 13 rotatably connected to the other side of the inner door 12. That is, one side of the outdoor 13 is rotatably connected to the other side of the inner door 12.

Illustratively, the outdoor 13 may be rotatably connected through the inner door 12 and the hinge HI, so that the front of each of the inner door 12 and the outdoor 13 face each other in a folded state. It is preferable that the hinge portion provided between the pair of wing portions coupled to each of the inner door 12 and the outdoor 13 of the hinge HI to rotate the wing portion is connected so that the device is disposed in the front in the unfolded state. .

Here, the front refers to the lower side based on FIG. 2 in the unfolded state of the device, and the rear refers to the upper side based on FIG. 2 in the unfolded state of the device, and the same will be applied in the following description.

1 to 5, one side of the cylinder 2 is rotatably connected to the post 11, the other side is rotatably connected to the inner door 12, and the inner door 12 It is placed at an angle to

Likewise, the cylinder 2 may be rotatably connected to each of the posts 11 and inner door 12 in a pin joint manner.

More specifically, the inner door 12 may be rotatably connected on the side facing the passage in the post 11, and the passage is the inner door 12 and the outdoor 13 in FIG. Refers to the road connecting the front and the rear based on, and the same will be applied below.

At this time, the cylinder 2 is rotatably connected to the rear side of the post 11 and the other side rotatably connected to the rear of the inner door 12, so that the cylinder 2 is naturally connected to the inner door 12 It can be arranged obliquely with respect to the longitudinal direction of.

The cylinder 2 is expandable and contractible in the longitudinal direction according to the hydraulic pressure, and is electrically connected to the control box CB via a cable CA, and the control box CB controls the hydraulic pressure of the cylinder 2 (2) can be stretched.

The control box CB is electrically connected to the switch SW so that the control box CB can adjust the hydraulic pressure of the cylinder 2 according to the operation of the switch SW (connecting a terminal to a contact point). As described above, the cylinder 2 and the control box CB may be electrically connected to each other while part of the cable CA is embedded in the post 11 and part of the cable CA is buried underground.

Exemplarily, the cylinder 2 may include a barrel and a piston accommodated in the barrel and moved along the longitudinal direction of the cylinder 2 by hydraulic pressure, and a rod connected to the piston. For example, one end of the barrel is the post ( 11) may be rotatably connected, and the other end of the rod may be rotatably connected to the inner door 12.

As described above, the inner door 12 is connected to the side facing the passage from the post 11, and one side of the cylinder 2 is connected to the rear side of the post 11 and the other side is the rear side of the inner door 12. The cylinder 2 is connected to and is disposed at an angle with respect to the longitudinal direction of the inner door 12, so that when the cylinder 2 is intended to expand and contract along the longitudinal direction of the cylinder 2 (one side of the cylinder 2 and the other The side is connected to the post 11 and the inner door 12 by a pin joint method, so it cannot be expanded or contracted.) The force is transmitted to the inner door 12 to connect the inner door 12 to the post 11 ( PI) can be rotated as a central axis.

2 and 3, when the cylinder 2 is to be compressed due to a decrease in hydraulic pressure in the barrel and the piston, the cylinder 2 has one side of the cylinder 2 behind the inner door 12. The cylinder 2 opens the passage by rotating the inner door 12 to the rear (counterclockwise based on Fig. 2) to move the other side of the inner door 12 to the rear side. can do,

In addition, referring to Figs. 4 and 5, when the cylinder 2 is to be elongated due to an increase in hydraulic pressure in the barrel and the piston, one side of the inner door 12 is connected to the side facing the passage from the post 11 and the cylinder One side of (2) is connected to the rear side from the post 11 (one side of the inner door 12 is connected closer to the passage than one side of the straight cylinder 2), so that the cylinder 2 is connected to the inner door ( In order to move 12) to the passage side, the cylinder 2 can close the passage by rotating the inner door 12 from the rear side to the passage side (clockwise rotation with reference to FIG. 4).

As described above, the present apparatus includes the cylinder 2 disposed obliquely with respect to the longitudinal direction of the inner door 12, thereby having the advantage that the inner door 12 can be automatically rotated.

1 to 5, the joint means 3 is connected to the outdoor 13 to rotate the outdoor 13 relative to the inner door 12 according to the driving of the cylinder 2.

More specifically, the joint means (3) may include a cam member (31), the cam member (31) is rotatably connected to the rear surface of the inner door (12), but a point connected to the cylinder (2) It may include a first node (node) unit 311 connected to the other side.

As described above, the rear surface refers to the upper side of FIG. 2.

The first node part 311 is formed with a node, which is a through hole, through which a pin PI having a plane-bottom length is formed with reference to FIG. 2.

The first node portion 311 of the cam member 31 may be interconnected with a bracket BK protruding rearward from the rear surface of the inner door 12 by a pin joint method.

At this time, the cam member 31 includes a second node 312 spaced apart from the first node 311 by a first length, and a second node 312 that is greater than the first length in a direction forming an obtuse angle with the direction of the first length. It may include a third node portion 313 spaced apart by a length.

Like the first node 311, the second node 312 and the third node 313 may have a node into which the pin PI is inserted.

A line connecting the second node part 312 and the third node part 313 may form an acute angle with each of the first length direction and the second length direction.

At this time, the joint means 3 is connected to the post 11 so that one side is rotatably connected, and the other side is the second node so that the separation distance from the longitudinal direction of the inner door 12 is greater than the one side. It may include a first link 32 that is rotatably connected to the unit 312.

At this time, the first link 32 is connected to the post 11 so that the portion connected to the post 11 is more spaced apart with respect to the length direction of the inner door 12 than the portion where the cylinder 2 is connected to the post 11 It may be desirable to be.

In addition, the joint means (3) includes a second link (33) at which one of both ends is rotatably connected to the third node (313), and the other is rotatably connected to the rear of the outdoor (13) can do.

At this time, when closing the passage while the device is unfolded, it is preferable that the third node portion 313 is disposed on the other side than the portion where the third link 33 is connected to the outdoor 13.

As described above, since each of the inner door 12 and the outdoor 13 is rotated by a hinge HI and folded so that the front faces thereof, each of the second link 33 and the third link 33 is a neighboring door ( 12) and the outdoor 13 is preferably connected to the rear of each.

4 and 5, in a state in which the device is folded to open the passage (see FIG. 4), the hydraulic pressure is adjusted as described above, so that the cylinder 2 extends in the longitudinal direction of the cylinder 2 ( When the inner door 12 is rotated toward the passage side due to the action of elongation force), the cam member 31 is moved to the other side by the first link 32 disposed so that the distance from the inner door 12 increases. The first node 311 connected to the door 12 may be rotated as a central axis.

Referring to FIG. 4 for example, the cam member 31 may rotate counterclockwise with the first node part 311 as a central axis. Therefore, the third node part 313 also rotates counterclockwise with the first node part 311 as a central axis to rotate the second link 33 counterclockwise, and by this second link 33 The outdoor 13 is rotated counterclockwise about the central axis of the hinge portion of the hinge HI to maintain the unfolded state together with the indoor unit 12 as shown in FIG.

2 and 3, in a state in which the device is unfolded and the passage is closed, the hydraulic pressure is adjusted as described above, so that a force in the direction in which the cylinder 2 expands and contracts (hereinafter, referred to as expansion and contraction force) is applied When the inner door 12 is rotated to the rear side, the first link 32 is disposed at an angle so that the separation distance from the inner door 12 increases as the first link 32 goes toward the other side, so that the cam member 31 is moved to the first node part 311. It can be rotated as a central axis.

Referring to FIG. 2 for example, the cam member 31 may be rotated clockwise with the first node part 311 as a central axis. Therefore, the third node part 313 also rotates clockwise with the first node part 311 as a central axis, so that the second link 33 rotates in the clockwise direction, and the second link 33 13 is rotated clockwise with the hinge portion of the hinge HI as a central axis, so that the folded state can be maintained together with the guide 12 as shown in FIG. 4.

The conventional folding door has a problem that it is difficult to automatically open and close because its configuration is complicated, unlike swinging doors and sliding doors, but the device has a cylinder 2 and a cylinder 2 for rotating the inner door 12 as described above. The advantage of being able to automatically open and close the folding door 1, which increases space utilization, including the joint means 3 that folds or unfolds the outdoor 13 with respect to the inner door 12 according to the drive of) There is this.

That is, since the device includes the joint means 3, the folding door 1 can be folded or unfolded only by a simple translational movement of the cylinder 2.

1 to 5, the cam member 31 includes a curved groove 314 provided between the first node 311 and the second node 312, the second node 312, and the third. It may include an arch protrusion 315 provided between the node portions 313 and protruding outward.

The curved groove portion 314 is formed by being recessed inward based on the longitudinal direction of the first length when viewed from the top, and the arch protrusion 315 is a second node portion 312 and a third node portion 313 when viewed from the plan view. ) May be formed to protrude outward based on the line connecting them.

In this way, the cam member 31 includes the curved groove 314 and the arch protrusion 315 to multidirectional external force transmitted by the inner door 12, the first link 32, and the second link 33. It has the advantage of increasing the stiffness by dispersing it.

In addition, the cam member 31 is provided between the first node part 311 and the third node part 313 and is recessed inward in the direction of the second length, and the inner door at the first node part 311 Corresponds to the side surfaces of the inner door 12 and the outdoor 13 at the first part 316a and the third node part 313 bent inward to have a shape corresponding to the rear of the other side of (12) It may include a receiving groove portion 316 including a second part (316b) bent inward to have a shape to have.

Referring to FIG. 4 in more detail based on a plan view, the first part 316a is the first part 316a based on the folded state of the inner door 12 and the outdoor 13 (see FIG. 4). The node part 311 may be bent inward to correspond to the other side of the rear side of the inner door 12. For example, since the first part 316a is bent at the first node part 311, the rear part connected to the hinge HI at the rear point of the inner door 12 connected to the first node part 311 It can be bent inward to correspond to the rear length to the end (top with reference to FIG. 4).

In addition, the second part 316b is a third node corresponding to the side of the inner door 12 and the outdoor 13 based on the folded state of the inner door 12 and the outdoor 13 (refer to FIG. 4). It may be bent inward in the portion 313. Here, the side is a surface that interconnects one side and one side of the front and rear of the inner door 12 and the outdoor 13, and the other side and the other side, and refers to the top and rear end surfaces of the inner door 12 and the outdoor 13, respectively. can do.

Referring to Figure 4, the second part (316b) may be preferably bent inward by the side length of the inner door 12 and the outdoor 13 and the distance between the inner door 12 and the outdoor 13. have.

In this way, the cam member 31 of the device includes the receiving groove portion 316, so that the inner door 12 and the outdoor door 13 are caught by the cam member 31 in the process of folding or unfolding the device. In particular, the other side of the inner door 12 and one side of the outdoor 13 are accommodated in the space formed by the receiving groove 316 and the second link 33 in the folded state as shown in FIG. There is an advantage of being improved.

1 to 5, the device may be provided with an infrared safety sensor on the front side of the post 11, which is connected to the control box CB to communicate with the cylinder 2 according to the presence or absence of infrared detection. ) Can be controlled. This is apparent to those skilled in the art, so a more detailed description will be omitted.

On the other hand, the device is provided outdoors, and the joint means (3) may be corroded by rainwater, etc., and when corrosion occurs, the rotation between the node and the pin (PI) is not smooth and the device operates normally. There is a fear that it will not work.

In addition, the joint means (3) is always exposed to the outside, causing scratches due to external factors (e.g., collision with construction equipment, collision with vehicles, collision with cleaning tools, collision with maintenance equipment, etc.). However, when scratches are generated, crack corrosion is promoted to increase the corrosion rate, and when corrosion occurs, stress corrosion cracking is promoted, and problems such as cracking may be exposed.

Referring to FIG. 6, the joint means 3 may include a coating film G provided on the outer surface as a means for solving the above problem. The coating film (G) is in contact with the outer surface of the joint means (3), but the adhesive layer (G1) that is softened in the first temperature range, the heating layer (G2) provided on the adhesive layer (G1), the heating layer (G2) top A protective layer (G4) provided on the intermediate layer (G3) that is softened in a second temperature range higher than the first temperature range, and a protective layer (G4) provided on the intermediate layer (G3) and softened at a third temperature higher than the second temperature range. ) Can be included.

This coating film (G) includes a protective layer (G4), the surface is high hardness and excellent abrasion resistance to suppress the occurrence of scratches on the joint means (3), and has water repellency, so that the joint means (3) is corroded. It can be suppressed from becoming. In particular, the coating film (G) includes an adhesive layer (G1) and an intermediate layer (G3) that are softened at a lower temperature in the first temperature range and the second temperature range, respectively, unlike the protective layer G4 on the surface, so that the surface of the coating film (G) While maintaining the physical and chemical properties of the protective layer (G4) provided on the surface, it is possible to more effectively remove the residual stress of the coating film (G) due to external environments such as thermal expansion and bending, thereby suppressing damage such as peeling, thereby reducing the service life. Since it can be extended, the joint means 3 can be protected from the external environment for a longer time.

In a specific embodiment, the adhesive layer G1 may include polybutylacrylate (PBA) and polymethyl methacrylate (PMMA). When the thickness of the adhesive layer (G1) is thick, a temperature gradient between the heat-generating layer (G2) to be described later and the outer surface of the joint means (3) is generated, so that the portion of the adhesive layer (G1) that contacts the outer surface of the joint means (3) Since softening may not be performed smoothly, the thickness is preferably 0.020mm to 0.150mm.

Exemplarily, the adhesive layer G1 may be formed by heat-coating polybutyl acrylate and polymethyl methacrylate. The softening temperature of the adhesive layer G1 is 90°C to 100°C, corresponding to the first temperature range.

As described above, since the adhesive layer G1 in the coating film G is softened in the first temperature range, which is the lowest temperature, peeling is suppressed due to excellent adhesion to the outer surface of the joint means 3.

The heating layer G2 is provided on the adhesive layer G1 and includes polyacetylene and iodine. Polyacetylene does not have a gap through which electrons flow in the conjugated double bond state, but since the gap can be widened by incorporating heterogeneous low molecules such as iodine, electrons flow, and when electricity is applied, heat is generated by electrical resistance.

In this way, by including the heating layer (G2), since there is no need to apply a large voltage to soften the adhesive layer (G1) and the intermediate layer (G3) to be described later, the service life of the coating film (G) is more economically extended. There is an advantage that you can do it.

The intermediate layer G3 may include 100 parts by weight of the cellulose acetate butyrate and 200 parts by weight of the carboxylate acrylic copolymer. If the weight ratio is out of the above, the adhesive strength between the adhesive layer G1 and the protective layer G4 may be insufficient, and thus, film peeling may occur during use. The softening temperature of the intermediate layer G3 is 150° C. to 160° C., corresponding to the second temperature range.

The protective layer (G4) may include 50 parts by weight of polymethylphenylsiloxane in toluene, 50 parts by weight of silicon-containing fibers, 50 parts by weight of silicon carbide, 6 parts by weight of manganese oxide, and 18 parts by weight of organosilicon-titanium compounds. have.

When the amount of polymethylphenylsiloxane is less than 50 parts by weight, the softening temperature decreases, the difference from the second temperature range decreases, the hardness decreases, and when it exceeds 50 parts by weight, it is not economical. When the content of the silicone-containing fiber is less than 50 parts by weight, the water repellency is deteriorated, and when it exceeds 50 parts by weight, the water repellency is not significantly improved, which is not economical. If silicon carbide is less than 50 parts by weight, the abrasion resistance is reduced, and if it exceeds 50 parts by weight, the abrasion resistance is not significantly improved, so it is not economical. If the organosilicon-titanium compound is less than 18 parts by weight, surface hardness and abrasion resistance are reduced, and if it exceeds 18 parts by weight, the degree of hardening is not clear, which is not economical.

As such, the softening temperature of the protective layer G4 is 650° C. (the third temperature), which maintains hardness even at a temperature lower than the third temperature, which is higher than the second temperature range, to maintain abrasion resistance and water repellency. The joint means (3) can be effectively protected from the external environment.

As described above, the coating film G is provided on the outer surface of the joint means 3, and residual stresses such as compressive stress and tensile stress due to the difference in the coefficient of thermal expansion from the joint means 3, bending by shape and external force, etc. May occur, and when such residual stress is generated, microincontinence, cracks, hillocks, wrinkling, fracture, etc., called crazing may occur in the coating film G.

Therefore, by applying electricity to the heating layer G2 so that the adhesive layer G1 and the intermediate layer G3 reach the first temperature range and the second temperature range, respectively, residual stress is removed in each of the adhesive layer G1 and the intermediate layer G3. Thus, it is to suppress the occurrence of fracture or the like due to residual stress.

At this time, it is important that the heating layer G2 generates heat below the third temperature so that the protective layer G4 does not soften, so the adhesive layer G1 and the intermediate layer G3 reach the first temperature range and the second temperature range, respectively. Thus, even during the softening process, the protective layer G4 is not softened, and thus properties such as excellent hardness, abrasion resistance, and water repellency can be maintained.

In particular, when the heating layer G2 generates heat at a temperature adjacent to the first temperature range (e.g., 150°C) in the second temperature range, the softening degree of the intermediate layer G3 is less than that of the adhesive layer G1, and the intermediate layer G3 Since it serves as a buffer between the adhesive layer G1 and the protective layer G4, it can serve as a bridge between the adhesive layer G1 and the protective layer G4.

That is, since the residual stress of the coating film (G) can be effectively dispersed and relaxed while maintaining the physical and chemical properties of the protective layer (G4), the joint means (3) can be continuously protected from external environments such as scratches and corrosion. There is an advantage that you can.

The present invention described above with reference to the accompanying drawings can be variously modified and changed by a person skilled in the art, and such modifications and changes should be construed as being included in the scope of the present invention.

Folding automatic door without lower rail: AF
Folding door: 1
Posts: 11 Inner Doors: 12
Outdoor: 13 Cylinders: 2
Joint means: 3 Cam member: 31
First node part: 311 Second node part: 312
Third node: 313 Curved groove: 314
Arch protrusion: 315 Receiving groove: 316
Part 1: 316a Part 2: 316b
1st link: 32 2nd link: 33
Hinge: HI Bracket: BK
Pin: PI Control Box: CB
Cable: CA Switch: SW

Claims (4)

As for opening and closing the passage,
A folding door including a post, an inner door having one side rotatably connected to the post, and an outdoor rotatably connected with the other side of the inner door;
A cylinder having one side rotatably connected to the post, the other side rotatably connected to the inner door, and disposed obliquely with respect to the inner door; And
A joint means connected to the outdoor and rotating the outdoor with respect to the inner door according to the driving of the cylinder;
Including,
The joint means,
A first node part rotatably connected to the rear surface of the inner door and connected to the other side than a point connected to the cylinder, a second node part spaced apart from the first node part by a first length, and the A cam member including a third node portion spaced apart from the first length by a second length greater than the first length in a direction forming an obtuse angle;
A first link in which one side is rotatably connected to the post and the other side is rotatably connected to the second node so that the other side is rotatably connected to the second node so that the distance from the other side to the longitudinal direction of the inner door is greater than that of one side; And
A second link having one of both ends rotatably connected to the third node and the other rotatably connected to a rear surface of the outdoor;
Folding automatic door without a lower rail, characterized in that it comprises a.
delete The method according to claim 1,
The cam member includes a curved groove provided between the first node part and the second node part, an arch protruding part provided between the second node part and the third node part and protruding outward, and the first node The first part and the third are provided between the part and the third node part and bent inward in the direction of the second length, but bent inward to have a shape corresponding to one side of the inner door at the first node part. A folding automatic door without a lower rail, further comprising a receiving groove including a second part bent inward to have a shape corresponding to a side surface of the inner door and the outdoor at the node portion.
The method according to claim 1,
The joint means includes a coating film provided on an outer surface, wherein the coating film contacts the outer surface of the joint means but is softened in a first temperature range, a heating layer provided on the adhesive layer, and provided on the heating layer. An intermediate layer softened in a second temperature range higher than the first temperature range, and a protective layer provided on an upper portion of the intermediate layer and softened at a third temperature higher than the second temperature range,
The adhesive layer includes polybutyl acrylate and polymethyl methacrylate, but has a thickness of 0.020 mm to 0.150 mm,
The heating layer includes polyacetylene and iodine,
The intermediate layer includes 100 parts by weight of cellulose acetate butyrate and 200 parts by weight of carboxylate acrylic copolymer,
The protective layer comprises 50 parts by weight of polymethylphenylsiloxane in toluene, 50 parts by weight of silicon-containing fibers, 50 parts by weight of silicon carbide, 6 parts by weight of manganese oxide, and 18 parts by weight of an organosilicon-titanium compound. Foldable automatic door without lower rail.

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