WO2006001580A1

WO2006001580A1 - Screen door system

Info

Publication number: WO2006001580A1
Application number: PCT/KR2005/000819
Authority: WO
Inventors: Woo Hyun Park
Original assignee: Woo Hyun Park
Priority date: 2004-04-01
Filing date: 2005-03-22
Publication date: 2006-01-05

Abstract

There is provided a screen door system with a screen door movably installed at a protective wall. In the screen door system, a guide groove is defined at a floor along a moving path of the screen door, a flexible insert bar is inserted in the guide groove by its own weight, a receiving groove is defined at a bottom surface of the screen door to receive the insert bar, and a guide rail is installed on the bottom of the screen door in association with the guide groove. The guide rail covers some portion of the receiving groove to lift the insert bar from the guide groove and push the insert bar into the receiving groove as the screen door moves.

Description

SCREEN DOOR SYSTEM Technical Field [1] The present invention relates to a screen door system, and more particularly, to a screen door system, which can prevent foreign substances from entering into a guide groove guiding the movement of the screen door. Background Art [2] Screen door is slidably installed in a protective wall of a subway or electric train platform and it is located such that when the electric train stops at the platform the train door is aligned with the screen door. Normally, the screen door is opened when the train arrives and closed when the train leaves, such that the passengers can be protected from falling down to the railroad. [3] For the sliding motion of the screen door along the protective wall, screen door system includes a guide member along the sliding path of the screen door. [4] Referring to FIG. l(a), for example, a screen door system includes a screen door 30, a guide rail 41 installed on a platform. The screen door 30 defines an insert groove 31 at a bottom. The insert groove 31 is formed in a width direction of the screen door 30, and the guide rail 41 is inserted in the insert groove 31, such that the sliding motion of the screen door 30 can be guided. [5] This screen door guide structure, however, is disadvantageous because the passengers are easy to fall over the guide rail 41 when they get into or out of the train. [6] To obviate this problem, another screen door system has been introduced as shown in FIG. l(b). Referring to FIG. l(b), a screen door system includes a screen door 20, a guide groove 11 installed on a platform. The screen door 20 includes a guide protrusion 21 at bottom. The guide protrusion 21 is formed in a width direction of the screen door 20 and it is inserted in the guide groove 11, such that the sliding motion of the screen door 30 can be guided. [7] Above screen door guide structure is also disadvantageous because the guide groove 11 is easy to build up foreign substances blocking the sliding motion of the screen door 20. [8] Further, slim object such as woman's high-heeled shoes can be inserted in the guide groove 11 to cause an accident. Disclosure of Invention Technical Problem [9] An object of the present invention is to provide a screen door system in which a guide groove guiding slide motion of the screen door can be protected from foreign substances. [10] The other objects and other advantages of the present invention will become more apparent by describing preferred embodiments thereof in detail. Technical Solution [11] According to an aspect of the present invention, there is provided a screen door system provided with a screen door movably installed at a protective wall, the screen door system including: a guide groove defined at a floor along a moving path of the screen door; a flexible insert bar inserted in the guide groove by its own weight; a receiving groove defined at a bottom surface of the screen door to receive the insert bar; and a guide rail installed on the bottom of the screen door in association with the guide groove, the guide rail covering some portion of the receiving groove to lift the insert bar from the guide groove and push the insert bar into the receiving groove as the screen door moves. [12] Therefore, the sliding motion of the screen door can be smoothly guided by the guide groove because the guide groove is protected from foreign substances. [13] The screen door system may further include a metallic contact member fixed to an inner surface of the guide groove without a gap therebetween. Also, the guide rail may include a lubricating plate attached to the portion associated with the guide groove, and the associated portion of the guide rail may be inserted in the guide groove. [14] Therefore, the guide rail does not directly make contact with the floor made of concrete owing to the contact member, thereby reducing abrasion of the guide rail. Also, the lubricating member reduces the guide rail abrasion much more, and as well enables more easy sliding motion of the screen door. [15] The guide rail may have a fixed plate removably fixed to a bottom of the screen door to cover a middle portion of the receiving groove, and a guide protrusion protruded from the fixed plate for coupling with the guide groove. [16] The insert bar may include: a through hole running a length of the insert bar; and a coil inserted in the through hole to heat the insert bar. [17] Therefore, the insert bar can be used at a low temperature such as in winter and outdoors. [18] The guide rail may include a protruded brush at bottom, and the floor may define at least one discharge hole along the bottom of the guide groove. [19] Therefore, foreign substance such as dust can be discharged by the brush through the discharge hole. Advantageous Effects [20] According to the present invention, the screen door can smoothly slide by blocking foreign substances from the guide groove guiding the sliding motion of the screen door. [21] Also, heels of women's shoes can be protected from being inserted in the guide groove. [22] Further, the screen door system provides a beautiful appearance. Description of Drawings [23] FIGs. l(a) and l(b) are sectional views showing a screen door guided on a platform according to the related art. [24] FIG. 2 is a partial cut-away perspective view showing an installation of a screen door system according to the present invention. [25] FIG. 3 is an enlarged phantom view of a protective wall and screen doors depicted in FIG. 2. [26] FIG. 4 is an exploded perspective view of a portion 'A' depicted in FIG. 3. [27] FIG. 5 is a side sectional view of a portion 'A' depicted in FIG. 3. [28] FIGs. 6 and 7 are partial front views showing opened and closed state of a screen door system according to an embodiment of the present invention. Best Mode [29] Now, preferred embodiments of a door screen system of the present invention will be described in detail with reference to the accompanying drawings. In the preferred embodiments of the present invention, a door screen system installed at a subway platform is exemplary described. [30] FIG. 2 is a partial cut-away perspective view showing an installation of a screen door system according to the present invention, and FIG. 3 is an enlarged phantom view of a protective wall and screen doors depicted in FIG. 2. [31] Referring to FIGs. 2 and 3, a protective wall 210 is installed on a platform 130 in the proximity of a railroad along which an electrical train 110 moves. The protective wall 210 may extend to the ceiling or to a predetermined height. Also, the protective wall 210 may be made of opaque material or transparent material such as glass. [32] The protective wall 210 defines one or more doorways 211 (three are shown). The doorway 211 is located such that when the electrical train 110 arrives at the platform 130 the doorway 211 comes into alignment with a door of the electrical train 110. A screen door 220 is slidably installed at the doorway 211 to open and close the doorway 211. For example, the screen door 220 may be a pair of doors capable of sliding in ap¬ proaching and departing directions. [33] A driving unit 230 is installed on an upper portion of the protective 210 to drive the screen door 220. The driving unit 230 includes a pair of pulleys 231 spaced apart from each other, a belt 233 around the pulleys 233, a motor 235 driving one of the pulleys 231, and transmitting members 237. The transmitting members 237 have one ends coupled to the belt 233 and the other ends coupled to the screen doors 220 to transmit motion from the linearly moving belt 233 to the screen doors 220. [34] Though the driving unit 230 is separately installed at each screen door 220, a common controller (not shown) controls the motor 235 of each driving unit 230. [35] Hereinafter, the screen door system of the present invention will be more fully described with reference to FIGs. 4 and 5. [36] FIG. 4 is an exploded perspective view of a portion 'A' depicted in FIG. 3, and FIG. 5 is a side sectional view of a portion 'A' depicted in FIG. 3. [37] 1. Platform 130 [38] The platform 130 defines a guide groove 131 faced with the bottom of the screen door 220. The width of the guide groove 131 is somewhat smaller than the width of the bottom of the screen door 220. Also, the platform 130 defines uniformly arranged discharge holes 133 along the bottom of the guide groove 131. The discharge holes 133 may be used to discharge foreign substances such as dust from the guide groove 133. [39] 2. Contact Member 260 [40] A contact member 260 is inserted in the guide groove 131 without a gap therebetween. The contact member 260 is an optional element of the screen door system of the present invention. The contact member 260 may be made of aluminum or stainless steel. The contact member 260 may be fixed to the inner surface of the guide groove 131 using mortar or silicon adhesive. [41] The contact member 260 defines discharge openings 261 at its bottom. The discharge openings 261 correspond to the discharge holes 133 of the platform 130. [42] 3. Guide Rail 240 [43] A guide rail 240 is provided to link the screen door 220 with the guide groove 131. According to an embodiment of the present invention, the guide rail 240 may includes a fixed plate 241 and a guide protrusion 242 vertically protruded from the fixed plate 241. The guide rail 240 may be made of aluminum. The width of the guide rail 240 may be 90% of the width of the screen door 220. [44] The fixed plate 241 is fixed to the bottom of the screen door 220, and the guide protrusion 242 is slidably inserted in the guide groove 131. [45] The fixed plate 241 may define a supporting groove 243 at a top, and lubricating plates 244 may be fixed to both sides of the guide protrusion 242. The lubricating plates 244 may be made of monomer casting (MC) nylon or plastic having high abrasion resistance and lubricating property. [46] Cleaners 270 may be attached to both ends of the guide protrusion 242. The cleaners 270 include brush portions protruding from the bottom of the guide protrusion [47] 4. Insert Bar 250 [48] An insert bar 250 is inserted between the guide groove 131 of the platform 130 and the bottom of the screen door 220. The insert bar 250 is inserted through under the pair of screen doors 220 and the protective wall 210 as shown in FIGs. 6 and 7. [49] The insert bar 250 is elastic and flexible. The insert bar 250 may be made of mat erial such as silicon and Polyvinyl chloride (PVC). The cross-sectional shape of the insert bar 250 may be polygonal or circular. In this embodiment, the insert bar 250 has a rectangular cross section with a rounded bottom for an easy insertion into the guide groove 131. [50] The insert bar 250 may define a through hole 252 running its length to increase flexibility. Also, a coil may be inserted in the through hole 252 to heat the insert bar 250. The coil may be coated to protect the insert bar 250 from being fused by the direct contact with the coil. The coil may be capable of generating heat at about 60 to 70 ° C. [51] Referring to FIG. 6, the coil inserted in the insert bar 250 extends to an upper location of the protective wall 210 along a post (not shown) supporting the protective wall 210. [52] 5. Screen Door 220 [53] The screen door 220 defines a receiving groove 223 at a bottom. The receiving groove 223 corresponds the guide groove 131 of the platform 130. The receiving groove 223 is deepened such that the insert bar 250 can be fully inserted in the receiving groove 223. [54] Also, the screen door 220 defines a fixing groove 221 beside each side of the receiving groove 223. That is, the fixing groove 221 is located astride the receiving groove 223. The fixed plate 241 of the guide rail 240 is detachably fixed to the fixing groove 221. Alternatively, the fixed plate 241 may be fixed to the bottom of the screen door 220 using screws or adhesive instead of defining the fixing groove 221. However, defining the fixing groove 221 may be preferable to remove the fixed plate 241 from the screen door 220 for maintenance and repairs. [55] The shape of the fixing groove 221 is shaped corresponding to the shape of the fixed plate 241 such that the fixed plate 241 can be fixed into the fixing groove 221 without department during the movement of the screen door 220. [56] Also, the both ends of the receiving groove 223 are rounded (not shown) to smoothly bend the insert bar 250 from the receiving groove 223 to the outside of the receiving groove 223. [57] An exemplary assembling of the screen door system of the present invention will now be described with reference to FIG. 5. [58] First, securely insert the contact member 260 in the guide groove 131 of the platform 130 using mortar or silicon adhesive. [59] Next, lift the screen door 220 upward (the top portion of the screen door 220 is slidably fixed) to insert the insert bar 250 to the receiving groove 223. After inserting the insert bar 250, insert the fixed plate 241 of the guide rail 240 into the fixing groove 221. [60] Thus, some portion of the insert bar 250 lying under the screen door 220 is inserted in the receiving groove 223, and the bottom of the inserted portion of the insert bar 250 is supported in the supporting groove 243 of the fixed plate 241. [61] Next, put down the lifted screen door 220 to insert the guide protrusion 242 of the guide rail 250 into the guide groove 131 of the platform 130. [62] Accordingly, the lubricating plates 244 at both sides of the guide protrusion 242 come into contact with the contact member 260. [63] An operation of the assembled screen door system of the present invention will now be described with reference to FIGs. 6 and 7. [64] FIGs. 6 is a partial front view showing an opened state of a screen door system according to an embodiment of the present invention. [65] The insert bar 250 includes a portion 250a on which the screen door 220 is placed and the other portion 250b on which the screen door 220 is not placed. The fixed plate 241 of the guide rail 240 lifts the portion 250a from the guide groove 131 to insert it into the receiving groove 223. Though the portion 250a is lifted, the portion 250b is still inserted in the guide groove 131 owing to its own weight and flexibility. [66] FIG. 7 is a partial front view showing a closed state of a screen door system according to an embodiment of the present invention. [67] As the pair of screen doors 220 approaches to each other, the fixed plate 241 con¬ tinuously lifts the insert bar 250 from the guide groove 131 to insert it into the receiving groove 223. [68] Therefore, the guide groove 131 can smoothly guide the sliding motion of the screen door 220 though it is filled with the insert bar 250. When the screen door 220 slides, the contact member 260 of the guide groove 131 comes into contact with the lu¬ bricating plates 244 attached on both sides of the guide protrusion 242, such that the screen door 220 can smoothly slide. [69] Meanwhile, the brush portion of the cleaner 270 sweeps foreign substances in the contact member 260 and discharges them to the outside through the discharge holes 133. [70] According to the present invention, the insert bar 250 is inserted in the guide groove 131 by its own weight and flexibility. The flexibility of the insert bar 250 may be decreased at low temperature such as in winter. [71] To prevent the flexibility decrease of the insert bar 250, the insert bar 250 may be heated by applying current to the coil 254 in the through hole 252 of the insert bar 250. For example, the insert bar 250 may be heated to about 60 to 70 ° C. [72] While the present invention has been described in detail, it should be understood that various changes, substitutions and alterations can be made hereto without departing from the spirit and scope of the invention as defined by the appended claims. [73] The insert bar 250 may be made of other material having predetermined weight and flexibility. Also, the cross section of the insert bar 250 may be variously changed in as¬ sociation with the shape of the guide groove 131. [74] Further, the shape of the guide rail 240 is not limited to the T-shape. The fixed plate 241 of the guide rail 240 may be shaped like a hook. Also, the guide protrusion 242 of the guide rail 240 may be formed with downwardly protruded brushes instead of attaching the separate cleaners 270. In addition, the guide rail 240 can be made of MC nylon or plastic without the lubricating plates 244 made of MC nylon or plastic. [75] Since the contact member 260 is optional element, the guide protrusion 241 of the guide rail 240 can be directly abutted on the surface of the guide groove 131 without the contact member 260. Also, bearings can be attached to the bottom of the guide protrusion 242 for the sliding motion of the screen door 220. Industrial Applicability [76] The screen door system of the present invention can be applied to building and airport doorways, as well as the subway platform doorway.

Claims

Claims [1] L A screen door system provided with a screen door movably installed at a protective wall, the screen door comprising: a guide groove defined at a floor along a moving path of the screen door; a flexible insert bar inserted in the guide groove by its own weight; a receiving groove defined at a bottom surface of the screen door to receive the insert bar; and a guide rail installed on the bottom of the screen door in association with the guide groove, the guide rail covering some portion of the receiving groove to lift the insert bar from the guide groove and push the insert bar into the receiving groove as the screen door moves. [2] 2. The screen door system of claim 1, further comprising a metallic contact member fixed to an inner surface of the guide groove without a gap therebetween. [3] 3. The screen door system of claim 1, wherein the insert bar includes: a through hole running a length of the insert bar; and a coil inserted in the through hole to heat the insert bar. [4] 4. The screen door system of claim 1, wherein the guide rail includes a lu¬ bricating plate attached to a portion correspondingto the guide groove, and the corresponding portion is inserted in the guide groove. [5] 5. The screen door system of claim 1, wherein the guide rail includes a protruded brush at bottom, and the floor defines at least one discharge hole along the bottom of the guide groove. [6] 6. A screen door system provided with a screen door movably installed at a protective wall, the screen door comprising: a guide groove defined at a floor along a moving path of the screen door; a flexible insert bar inserted in the guide groove by its own weight; a receiving groove defined at a bottom surface of the screen door to receive the insert bar; and a guide rail having a fixed plate removably fixed to a bottom of the screen door to cover a middle portion of the receiving groove, and a guide protrusion protruded from the fixed plate for coupling with the guide groove, wherein the fixed plate lifts the insert bar from the guide groove and pushes the insert bar into the receiving groove as the screen door moves. [7] 7. The screen door system of claim 6, further comprising a metallic contact member fixed to an inner surface of the guide groove without a gap therebetween, the contact member being in contact with lubricating plates fixed on both sides of the guide protrusion.