KR100977005B1 - Apparatus for opening and shutting sliding door - Google Patents

Abstract

Disclosed is a sliding door opening and closing device having a minimum installation width by a feed screw driving method. The disclosed switchgear includes a motor, a lead screw connected to a shaft of the motor and rotationally driven, the lead screw having a spiral groove corresponding to the opening / closing movement section of the door, and a lead nut coupled with the spiral groove to the lead screw to move linearly according to the rotation thereof. A guide rail having a rail portion for opening and closing a moving track of the door on a line parallel to the center of the lead screw, a roller assembly attached to the guide rail and suspended by a door to move together, the lead nut and the door supporting means And a linkage assembly that connects to move together while allowing their mutual flow in the vertical direction. The device easily absorbs vibrations between the drive side and the door side within approximately the width of the door, allowing the door to be opened and closed smoothly. In other words, by minimizing the installation width of the sliding door opening and closing device, it is possible to apply the transfer screw driving method to the door of the existing electric train with a small installation space, which is effective in enhancing the safety and performance of the door of the old electric train. to be.

Sliding Doors, Train Doors, Leadscrews, Roller and Link Assemblies

Description

Sliding door opener {APPARATUS FOR OPENING AND SHUTTING SLIDING DOOR}

The present invention relates to a sliding door opening and closing device, which is suitable for the door of the electric train or the screen door of the platform, and in particular, an automatic feed screw drive system which is improved to be suitable for an environment where a small installation space is required and safety and quick opening and closing are required. It relates to an opening and closing mechanism.

Electric trains have several sets of doors for each vehicle, and screen doors are also installed in the platform corresponding to the doors of each vehicle. The train doors and the screen doors of the platform are two pairs of sliding doors which are opened and closed in both directions, and a plurality of pairs are opened and closed at the same time by remote control.

Opening and closing devices of sliding doors, such as train doors and screen doors, have been mainly applied as hydraulic or pneumatic and wire or belt drive types as driving means thereof. However, the hydraulic or pneumatic type is a compressor for generating hydraulic or pneumatic pressure, solenoid valves for controlling the hydraulic or pneumatic flow path generated by the compressor, and a hydraulic or pneumatic actuator for moving the door in the opening and closing direction by the controlled hydraulic or pneumatic pressure. As expensive equipment is used, it is uneconomical because of high installation and maintenance costs, especially when the door is opened and closed. The wire or belt drive type requires a motor generating power, a drive pulley driven rotationally by the power of the motor, a driven pulley arranged at a distance between the drive pulley and the door opening, and a wire or belt wound between the drive pulley and the driven pulley. Its installation and adjustment is not easy, it is frequently broken due to overload, etc.

On the other hand, the inventor has proposed a feed screw driving method using a lead screw and a lead nut as a driving means of the screen door opening and closing device through Utility Model Registration 20-0426905. The feed screw drive method of the pre-designed design uses a pair of lead screws and lead nuts that use a motor as a drive source and converts the rotational movement of the motor shaft into a linear motion. It further improves safety and convenience, and has fewer breakdowns, thus providing an economic effect on maintenance.

Recently, the transfer screw drive method has been applied to the door of the electric train in many ways, and the demand for retrofitting the transfer screw drive method for the existing electric train door is increasing. Since the door for the electric train is controlled to open and close in the same manner in synchronization with the screen door of the platform, it is a matter of course that the same device as the above-described preliminary design can be applied as it is.

However, in case of remodeling the opening and closing device of the old electric train door, the space for installing the opening and closing mechanism such as the lead screw and guide roller bracket described above is much smaller than that of the screen door. There is a problem that can not be applied as it is.

In addition, in the feed screw drive method, the lead screw for converting the rotational power of the motor, which is the driving source, into linear motion, and the track of the means for moving and supporting the door must be kept parallel in the horizontal direction, so the rigidity of the lead screw is required. On the other hand, in the above-described pre-registration proposal, a pair of lead screws arranged in correspondence with each pair is arranged, but in this case, there is a technical difficulty in maintaining the straightness of the pair of lead screws.

In addition, even if the rigidity of the lead screw is sufficient for smooth opening and closing of the door and the straightness is well maintained, the door load or vibration may be accommodated between the driving side and the door support side during the door opening and closing. So-called link means are required, and the link means must be capable of stretching at least in two axes. On the other hand, in the case of the above-mentioned pre-registration proposal, the articulated link device is used, but this requires a large space in the width direction, and thus it is difficult to apply to the existing train door as described above.

On the other hand, in power-operated switchgear, work performance such as installation and adjustment considering the load of the door supported by the hanger method, minimization of failure factors such as mechanical wear due to frequent opening and closing operations, and economical efficiency of maintenance such as maintenance are considered. Should be.

It is an object of the present invention to provide a sliding door opening and closing device that is optimally designed to meet the above technical demands and to be more suitable for an environment in which an installation space, such as an existing aging train door, is narrow.

Sliding door opening and closing device according to the present invention for achieving the above object is a motor having a shaft that rotates by the operation of electricity, the lead screw is connected to the axis of the motor is rotated and has a spiral groove corresponding to the opening and closing section of the door, A guide nut having a guide nut coupled to the spiral groove and linearly moving according to the rotation thereof, a guide rail having a rail portion which forms an opening and closing movement track of the door on a line parallel to the center of the lead screw, and a roller guided to the guide rail; It may be provided in a configuration that includes a roller assembly for supporting the door by hanging and moving together, the link assembly for connecting the lead nut and the door support means to move together while allowing at least mutual flow in the vertical direction.

As a preferred form, the lead screw in the present invention may be provided with two pairs of sliding doors which are bilaterally symmetrical to correspond to each pair of opening and closing sections in a single rod, for two pairs of sliding doors which are opened and closed in both directions. Here, more preferably, the helical grooves in each direction are formed in two or more of equal phase difference, the rod is drawn from a rod of larger diameter, and the surface is coated with an abrasion-resistant protective layer, and the rod is made of an aluminum alloy. The protective layer may be formed of a hard aluminum oxide film by anodizing the aluminum alloy.

In a preferred embodiment, the roller assembly according to the present invention includes a roller bracket for attaching and supporting the roller and a connecting bracket for connecting the roller bracket with a door, and adjusting the height of the door between the roller bracket and the connecting bracket. Door height adjustment means may be provided, wherein more preferably there are a plurality of rollers attached to the roller assembly, at least one of which has an eccentric shaft and the rotation center is moved to the eccentric shaft to a different height than the other rollers The guide rail may be formed side by side above the rail unit, and an auxiliary rail unit may be formed to prevent the detachment of the guide rail. As the door height adjusting means, the roller bracket and the connecting bracket are fastened to each other by a plurality of bolt elements, and one of the bolt elements is formed on an eccentric shaft of the circular cam and can be configured to be adjusted by the displacement of the circular cam. have.

In a preferred embodiment, the link assembly according to the present invention is a nut holder having a protrusion extending vertically downwardly connected and fixed together with the lead nut, and receiving a protrusion of the nut holder in a vertical direction and being mutually stretchable and open and close directions. It may be configured to include a linking member connected to restrained to move together, pivoting means for supporting the link member to be rotated and swinged in a line parallel to the opening and closing direction. As the pivoting means, two pivot members for supporting the link member on both sides, one of which pivot member has a bolt-shaped screw, accommodates the link member and restrains each other in the opening and closing direction while allowing the rotational movement thereof. A link holder which can move together and restrains the two pivot members respectively, and penetrates the two pivot members which are fixed to the roller assembly and protrude through the link holders, respectively, to be movable in the opening and closing direction. A pivot support block for supporting and an adjustment nut fastened to the threaded portion with respect to the pivot support block in which the pivot member having the thread portion is supported may be provided to adjust the horizontal position of the door with respect to the lead nut position. Here, more preferably, the lead nut has a hole for fastening the bolt element penetrating the nut holder, it may be provided with a heli coil (heli coil) that can be mounted to the hole to elastically fasten the bolt element. have.

In a preferred embodiment, the guide rail has a guide groove for arranging and arranging the motor and the lead screw on the same axis to the guide rail, and / or to align the motor and the lead screw on the same axis. Grooves for inserting and moving the fastening nuts may be formed, and may be provided as separate drive side guide rails having such guide grooves and / or grooves.

In a further preferred form the present invention may comprise a door locking means operable to lock the door after the motor is operated to close the door and to release the locked door just before the door is operated to open the door.

In still another aspect, the present invention provides a latch bracket fixed to the roller assembly and having a latch hole, a latch member capable of entering and exiting the latch hole of the latch bracket when the door is closed, and advances the latch member to the latch hole. And a solenoid actuator having a plunger actuating in a direction to make the door move, the door locking means being operable to lock the door after the motor is operated to close the door and to release the locked door just before acting to open the door. can do.

In the sliding door opening and closing device according to the present invention, the lead screw made of a single rod is effective in maintaining straightness for all opening and closing sections of two sliding doors, and minimizes the thickness by improved mechanical properties by processing and surface treatment after drawing. It is therefore possible to reduce the installation width of the entire apparatus.

The position-adjustable release preventing roller, which is added to the roller assembly, can be installed on the guide rail together with the roller assembly assembled to the door, and also after the door is installed by the door height adjusting means using the connecting bracket. It provides the effect of improving the workability of the maintenance, such as the installation of the door including the adjustment, and the maintenance after the installation.

The link device is a structure that absorbs the flow between the driving means and the door side on a vertical surface with respect to the center of the lead screw, and can be installed within a width approximately equal to the door thickness since there is no large deflection. It is also possible to arrange the center of the raceway of the roller which guides the movement while supporting the axis center of the lead screw and the sliding door on the same vertical surface. Therefore, the installation width of the switchgear can be minimized.

On the other hand, the guide rail is improved workability to align and fix the motor and the lead screw in a straight line, and also provided by dividing the drive side and the door side can be easily inserted and installed through the inspection port of the existing train, such work It increases the accuracy of the instrument placement while increasing the performance.

As described above, the present invention is effective in minimizing the installation width of the sliding door opening and closing device. Therefore, the transfer screw driving method is also introduced to the door of the existing electric train having a small installation space, thereby improving the safety and performance of the old aging electric train door. It will be an invention that can be intended.

In addition, the present invention is to provide an effect that the overall assembly installation is easy to repair and increase the economics of maintenance.

On the other hand, the present invention can reduce the installation width of the switchgear for the screen door of the platform as well as the sliding door of the building as well as the electric train can increase the space utilization of each structure, the installation space is very narrow and safe and accurate It is also very useful for elevator doors that require special opening and closing control.

Hereinafter, the sliding door support device according to an embodiment of the present invention with reference to the accompanying drawings in detail.

The accompanying drawings show an embodiment for applying to an existing electric train in one preferred form of the present invention, the present invention is applicable to the screen doors installed in the platform in addition to the electric train, as well as being installed in various other buildings Of course, it can also be applied to sliding doors and US doors. In addition, the drawings are only for the purpose of understanding the present invention to the last, there may be a difference from the actual, such as some components are exaggerated or omitted.

In Fig. 1, reference numerals 1a and 1b indicate doors. The doors 1a and 1b are two pairs of sliding doors that open and close the door 2 to both sides. The reinforcing plate 3 is provided in the installation space above the entrance 2. The reinforcement plate 3 is a rigid structure and has a plurality of support portions 4 in the form of longitudinal bars formed at intervals. On the other hand, there is an inspection opening (6) on the interior side wall of the installation space, the sliding door opening and closing device according to the present invention is considered to be easily installed through the inspection opening (6).

In a preferred embodiment of the opening and closing device of the present embodiment, two guide rails 10 and 20, a motor 30 that is electrically operated as a driving source, and a lead screw 50 connected to the shaft of the motor 30 to be driven in rotation As the lead screw 50 rotates, two pairs of the doors 1a and 1b linearly move in the opening and closing directions, respectively, supporting the doors and guided along a predetermined track of the opening and closing sections. Two roller assemblies 100a and 100b provided in the pair, one link assembly 200a and 200b for connecting the roller assembly of each pair and the lead nuts 80a and 80b, and a locking device for locking two doors ( 300). When the lead screw 50 is driven according to the operation of the motor 30, the lead nuts 80a and 80b linearly move in opposite directions to each other according to the rotation of the lead screw 50, so that the two doors 1a and 1b are moved. Lead the mat in each opening and closing direction. On the other hand, the switchgear includes remote sensors based on various sensors for collecting information related to door opening / closing control, such as the door of an electric train or the screen door of a platform, and information collected through the sensors. And a separate control panel for controlling the operation of the motor in accordance with the instruction, etc., but they are also possible to be implemented as a conventional one, and since they are not directly related to the subject matter of the present invention, detailed descriptions and examples thereof will be omitted. .

The guide rails 10 and 20 are fixedly installed by bolting to the reinforcement plate 4 and the support portion 5 described above. The guide rails 10 and 20 are, for example, aluminum continuous extrudates, which may be provided as a single piece, but are divided so that they can be easily inserted and installed through the inspection opening 3 (see FIG. 2).

Referring to FIG. 2, the reinforcement plate 4 is fixedly attached to the outdoor wall of the vehicle body 7 in the installation space by welding or bolting, and the guide rails 10 and 20 attach the reinforcement plate 4 to each other. Relying on the top and bottom and fixed with the step in the installation width direction. In the opening and closing device of the present embodiment, the motor 30 and the lead screw 50, which are the driving side, are disposed on the upper guide rail 10, and the roller assembly 100 supporting the doors 1a and 1b is the lower guide rail. Guided by 20. As shown in this figure, the opening and closing device of the present invention is the center of the motor 30 and the lead screw 50, the center of the rolling track of the roller assembly 100 and the center of the doors (1a, 1b) doors on the same vertical surface The width of the installation is minimized by placing in. In FIG. 2, the code | symbol 8 is a panel which covers the inspection opening 3 mentioned above, and can open and close.

Referring to FIG. 3, the motor 30 is fixedly supported on two motor brackets 40a and 40b, and the lead screw 50 is rotatably supported on four bearing blocks 6a to 60b at both ends and two central portions thereof. It is directly connected by the mutual shaft coupler 70. The motor brackets 40a and 40b and the bearing blocks 6a to 60b may be various according to each position. As a preferred embodiment, as shown in Figure 4, the guide rail 10 is formed with a guide groove 11 and the groove 12, the motor bracket (40a, 40b) and the bearing block (6a ~ 60b) and the like guide A projection 61 and a bolt through hole 62 are formed at positions corresponding to the groove 11 and the groove 12, and a bolt fastening nut 63 which can be inserted into the groove 12 is used. Therefore, the motor 30 and the lead screw 50 can be easily aligned and fixed.

Referring to FIG. 5, the lead screw 50 is divided into one conveying part 51a and the other conveying part 51b as a single rod as shown in FIG. 2, and the two sliding parts described above are provided in the conveying parts 51a and 51b. Corresponding spiral openings 52a and 52b having opposite directions and having the same period and pitch are formed corresponding to the opening and closing transfer sections of the movable doors. In addition, the end portion 53 of the one side transfer portion 51a and the end portion 54 of the other side transfer portion 51b are processed to have a small diameter to fit the bearing described above, and a spiral groove is inserted into the center portion to hold the other bearing described above. It is processed by the idle part 55 which does not exist. In addition, the one end 53 is formed with a key groove 56 machined for engagement with the shaft coupler described above.

The spiral groove described above is a double spiral groove 52a; 52a-1, 52a-2, 52b; 52b-1, 52b-2, which translates with a 180-degree phase difference as shown in FIG. 3A, or 120-degree phase difference as shown in FIG. The three spiral grooves 52a; 52a-1, 52a-2, 52a-3, 52b; 52b-1, 52b-2, and 52b-3 may be formed. As described above, the double or more spiral grooves reduce the load on the motor by making the linear nuts of the lead nuts 80a and 80b smoother.

The lead screw 50 is preferably produced through the drawing of the raw material bar, the post-processing and surface treatment of the respective parts.

7 illustrates the drawing process. That is, the rod 530 of small diameter d ₁ is obtained from the rod 520 of diameter d ₀ , which is a raw material, through the die 510 having a wide inlet and narrow outlet provided in the die head 500. In this case, the rod body 530 is denser than the rod material 520, the density and strength is higher, and durability such as bending is improved. The diameter ratio d ₀ / d ₁ of the bar 520 and the bar 530 may be set in consideration of the material or the required durability.

The bar 530 obtained as described above is subjected to post-processing after the spiral grooves or the like is subjected to lathe cutting or the like, and has a protective layer 57 on the surface as shown in FIG. 8. The protective layer 57 is to improve the wear resistance of the surface, and any material having good wear resistance may be used by various methods such as painting, coating, and deposition. Preferably, an aluminum alloy is used as the material of the rod body 130, and an oxide film by anodizing the surface of the aluminum alloy is formed as a protective layer 57, particularly a hard aluminum oxide film. The hard aluminum oxide film by anodizing is formed to a thickness of several to several tens of micrometers, and is harder than an aluminum alloy, which is a raw material, and exhibits excellent performance for use in rotating parts requiring high wear resistance as a high hardness. The hard aluminum oxide film also has good corrosion resistance to prolong its service life, increase lubricity along with wear resistance, soften the opening and closing movement, and reduce noise. The aluminum oxide film is also glossy to improve the appearance. In particular, due to the improvement of the mechanical properties, the lead screw 50 of the present embodiment can minimize the diameter of the bar and thus effective in reducing the installation width of the entire switchgear.

The doors (1a, 1b) is supported by the upper end is fastened to the bracket of the roller assembly (100a, 100b), the roller assembly (100a, 100b) can be moved smoothly by being guided to the lower guide rail (20). The roller assemblies 100a and 100b are installed in pairs of the doors 1a and 1b, one of each pair of the lead nuts 80a and 80b through the link assembly 200a and 200b according to the present invention. Connected with.

Referring to FIG. 9, the roller assembly 100 according to the present embodiment is supported by adjusting the positions of the two driving guide rollers 110a and 120b, the separation preventing roller 120, and the release detecting roller 120. It consists of a two-stage shaft 130 for fixing, a roller bracket 140, a connecting bracket 150, and a cam bolt 160 for adjusting the door height, the guide rail 20 is provided with a main rail portion 21 and auxiliary The rail part 22 is formed.

The driving guide rollers 110a and 110b are seated on the main rail portion 21 of the guide rail 20 and are in contact with the cloud, and do not contact or catch the upper auxiliary rail portion 21. The separation prevention roller 120 is to prevent the separation by slightly caught on the upper auxiliary rail portion 21 without contacting or hanging the main rail portion 21 of the guide rail 20, and the two-stage shaft for adjusting the position of the rotation center. And fixed and supported at 130.

Referring to FIG. 10, the two-stage shaft 130 includes a body 131, a support shaft portion 132 protruding at the center of one side of the body 131, and a fixed shaft portion protruding at an eccentric position of the other side of the body 131. It consists of 133. The support shaft 132 is supported by a roller body 121 as a bearing (not shown), and the fixed shaft portion 133 is bolt-shaped and inserted into the bolt through hole 141 of the roller bracket 140, and then the fixing nut 170 ) Is fastened. When the fixing nut 170 is fastened, the other side surface 134 of the body 131 which is in pressure contact with the roller bracket 140 is a rough surface, preferably a rough surface by scratching in a radial direction (see FIG. 9). There is no slip after the fastening. In addition, it is preferable to form a wrench groove 135 on the end of the fixed shaft portion 133, so that it is possible to adjust the rotation by using a separate wrench tool.

When the separation prevention roller 120 is in the position of the imaginary line of FIG. 9, the main rail part 21 and the auxiliary rail part 22 of the guide rail 20 are easily formed like other driving guide rollers 110a and 110b. It is possible to enter. Therefore, the rollers are installed on the guide rail 20 in a state of being assembled to the roller bracket 140, and the roller bracket 140 is coupled to each pair of doors 1a and 1b through the connecting bracket 150. Therefore, workability of the installation and subsequent maintenance is greatly improved. Of course, each of the rollers can increase or decrease the quantity as needed.

Referring to FIG. 11, the connecting bracket 150 has a bolt fastening hole 151 for fastening and fastening with the roller bracket 140 at two places and a circular hole 152 for height adjustment and fastening and fastening at one place. . In the roller bracket 140, a vertical long hole 142 is formed at a position corresponding to the bolt fastening hole 151, and a horizontal long hole 143 is formed at a position corresponding to the circular hole 152. The circular cam bolt 160 is formed with a diameter corresponding to the width of the circular cam portion 161, the horizontal long hole 143 that can be inserted and rotated in the circular hole 152, the support portion 162 eccentric with the circular cam portion 161 And a bolt portion 163 extending from the support portion 162 and an angular shaft portion 164 further extending from the bolt portion 163. One surface 165 of the circular cam portion 161 is a rough surface, preferably a rough surface (see Fig. 11) by a scratch in the radial direction.

When the circular cam bolt 160 is rotated, the circular cam portion 161 rotates to change its center position, and the assembly height of the connecting bracket 150 to the roller bracket 140 is changed according to the variable. Therefore, the height of each pair of doors (1a, 1b) can be adjusted.

Referring to FIG. 12, the link assembly 200 connecting the lead nut 80 and the roller assembly 100 may include a nut holder 210, a link member 220, a link holder 230, and two pivot members. 240 and 250, a pivot support block 260, an adjustment nut 270, a flat washer 280, and a spring washer 290.

The nut holder 210 is configured to receive the lead nut 80 and to be bolted at both sides thereof, and has a protrusion 211 extending vertically downward.

The link member 220 has a recess 221 accommodating the protrusion 211 of the nut holder 210 and a pivot hole 222 concave at both sides in the direction of the lead screw 40. Here, the recess 221 is movable in the vertical direction of the protrusion 211 of the nut holder 210 accommodated in the restraint in other directions, such as the door opening and closing direction.

The link holder 230 has a rectangular frame shape for accommodating the link member 220, a circular hole 231 penetrating both sides in the door opening and closing direction, and a rectangular groove portion 232 extending around the circular hole 231. And a cover 233 fixedly attached to each side by screws. The cover 233 is formed with a circular hole 234 and a rectangular groove 232 corresponding to each side surface of the link holder 230.

The two pivot members 240 and 250 that are heterogeneous are composed of a square portion 241 and 251, a pivot portion 242 and 252 on one side of the square portions 241 and 251, and support portions 243 and 253 on the other side thereof, and one pivot member 240 is a support portion. 243 is sufficiently long and is formed of a threaded portion such as a bolt. Here, the rectangular portions 241 and 251 are accommodated in the above-described rectangular groove portions 232 of the link holder 230 so that the rotation thereof is constrained, and the pivot portions 242 and 252 open the circular holes 231 of the link holder 230. It is inserted into the pivot hole 222 of the above-described link member 220 to pass through and rotatably support the link member 220.

The pivot support block 260 has a support hole 261 for movably supporting the support parts 243 and 253 of the pivot members 240 and 250 described above, and is fixedly bolted to the bracket upper surface part 110 of the roller assembly.

The adjusting nut 270 is for adjusting the length of the supporting part 243 of the one pivot member 240 with respect to the one pivot supporting block 260, and the flat washer 280 and the spring washer 290 are the adjusting nut 270. ) Is to prevent relaxation.

Referring to FIG. 13, the lead nut 80 and the nut holder 210 move together by being bolted together, while the nut holder 210 and the link member 220 receive the protrusion 211 in the vertical direction. The groove 221 serves to expand and contract with each other in the vertical flow. The link member 220 is also rotatable about the center of the pivot member parallel to the door opening and closing direction, thereby acting to absorb vibrations or shocks between the driving side and the door side in all directions except the door opening and closing direction. Therefore, the doors (1a, 1b) can be opened and closed smoothly without the impact of vibration or shock.

Referring to the enlarged view of the circle in Fig. 13, the lead nut 80 is fastened to the bolt (not shown) through the nut holder 210 on both sides, preferably in the bolt hole 81 for fastening the bolt Coil 82 is mounted. The helicoil 82 is effective in preventing the bolts from loosening despite the impact of impact, such as by elastically fastening and restraining the bolts. In particular, since the lead nut 80 requires good lubrication between the lead screw 30, even when using a self-lubricating material for this purpose it can effectively prevent the loosening of the bolt due to the lubricant flowing out of the material even finely will be.

Referring to FIG. 14, two pivot members 240 and 250 pivotally supporting the link member 220 at both sides of the door opening and closing direction are fixed to the link holder 230 by the square parts 241 and 251, and the roller assembly 100. The pivot support block 260 fixed to the bracket 110 may be moved in the door opening and closing direction by the support parts 243 and 253. Therefore, by adjusting the length of the adjustment nut 270 is fastened to the support portion 243 of one pivot member 240, the link position of the doors (1a, 1b) with respect to the lead nut 80, that is, the doors (1a, 1b) The horizontal position of each pair can be adjusted approximately within the allowable length of the support portion 243. By using this adjustment function, the initial position can be adjusted so that a gap does not occur when the doors 1a and 1b are closed.

Next, referring to FIG. 15, the locking unit 300 capable of locking the two pairs of doors 1a and 1b in the closed state is fixedly attached over the upper and lower guide rails 10 and 20, and the latch holders 311a, 311b) is used, and is connected to the solenoid actuator 320 fixed to the bracket 310, the plunger 321 of the solenoid actuator 320 and the latch holders 311a and 311b. The latch arm 330 with the latches 331a and 331b inserted into and inserted into the movable block 340 connected to the opposite side of the plunger 321 of the solenoid actuator 320 and interlocked at one point of the path of the movable block 340. A latch switch 401a having a microswitch 350 for switching an electrical signal and bolted to each bracket of the roller assemblies 100a and 100b and positioned at a position corresponding to the latches 331a and 331b; And latch hole brackets 400a and 400b each having 401b.

The latch hole brackets 400a and 400b may be integrally formed with the roller bracket 140 described above, and may be directly installed at each door of the doors 1a and 1b.

The solenoid actuator 320 of the locking unit 300 is controlled by the individual control panel as described above, generates electronic thrust during energization and pulls up the plunger 321, and the plunger 321 during non-energization springs. Return by 360. The micro switch 350 has a three-terminal switching circuit alternately with two movable contacts, and switches a signal indicating whether the door is locked or released by the solenoid actuator 320.

When the train stops at the platform, the solenoid actuator 320 is energized to pull the latch arm 330. Then, the latches 331a and 331b at both ends of the latch arm 330 are released from the latch holes 401a and 401b of the latch hole brackets 400a and 400b to release the locked state, and the microswitch 350 is released. Outputs a switching signal indicating. Therefore, the individual control panel is to control the door (1a, 1b) to be opened by operating the motor after the switching signal.

When the doors 1a and 1b are opened and closed, the individual control panel recognizes the door closed state from other sensors not shown, and then shuts off the power supply of the solenoid actuator 320. Then, the latches 331a and 331b at both ends of the latch arm 330 returned by the spring 600 are inserted into the latch holes 401a and 401b of the latch hole brackets 400a and 400b and the doors 1a and 1b are inserted. Locked, the microswitch 350 outputs a switching signal indicating the completion of the lock state. Therefore, you can safely start the train afterwards.

In the above embodiment, two sliding doors, such as the door of the electric train, are taken as an example, but the present invention can be applied to a sliding door or a sliding door, which is installed in not only a train door but also a screen door for the platform and various buildings. It can be applied to sliding doors, especially elevator doors with very narrow space and high vibration.

1 is a schematic layout view of the entire electric train door opening and closing apparatus to which the present invention is applied.

FIG. 2 is a schematic partial sectional view seen from the line A-A of FIG. 1; FIG.

Figure 3 is a schematic plan view showing the alignment of the motor and the lead screw in the sliding door opening and closing apparatus according to the present invention.

4 is a cross-sectional view taken along line B-B of FIG. 3.

5 is a perspective view showing a preferred form of the lead screw in the sliding door opening and closing device according to the present invention.

6a and 6b are various cross-sectional views showing a preferred form of the lead screw in the sliding door opening and closing device according to the present invention.

It is a schematic diagram explaining the drawing process of the lead screw in the sliding door opening and closing apparatus which concerns on this invention.

Figure 8 is a cross-sectional view of the surface treatment state of the lead screw in the sliding door opening and closing apparatus according to the present invention.

9 is a partial cutaway front view of the roller assembly in the sliding door opening and closing apparatus according to the present invention.

FIG. 10 is a schematic cross sectional view taken along line C-C in FIG. 9; FIG.

FIG. 11 is a schematic sectional view seen along the line D-D in FIG. 9; FIG.

12 is an exploded perspective view of the link assembly in the sliding door opening and closing device according to the present invention.

13 is a longitudinal sectional view of an essential part of a linkage assembly in a sliding door opening and closing device according to the present invention;

14 is a cross-sectional view of a linkage assembly in a sliding door opening and closing device according to the present invention;

15 is a schematic layout view of a locking device in a sliding door opening and closing device according to the present invention;

Explanation of symbols on the main parts of the drawings

1a, 1b: door

10,20: guide rail

30: motor

50: lead screw

80; 80a, 80b: Lead nut

100; 100a, 100b: roller assembly

200; 200a, 200b: link assembly

300: locking device

Claims (18)

A motor having a shaft that rotates by electric operation, connected to the shaft of the motor and driven to rotate, a lead screw having a spiral groove corresponding to the opening / closing movement section of the door, and coupled with the spiral groove to the lift screw to move linearly according to its rotation. A guide nut having a lead nut, a rail unit forming an opening and closing track of a door on a line parallel to the center of the lead screw, and a roller assembly attached to the guide rail and suspended by supporting the door and moving together, the lead nut and the door And a linkage assembly for connecting the support means to move together while allowing at least mutual flow in the vertical direction. 2. The sliding door opening and closing of claim 1, wherein the lead screw is provided with two bilateral spiral grooves symmetrically corresponding to each pair of opening and closing sections in a single rod, with respect to the two sliding doors that are opened and closed in both directions. Device. The sliding door opening and closing device according to claim 2, wherein the helical grooves in each direction of the lead screw are formed in two or more of equal phase differences. The sliding door opening and closing device according to claim 2, wherein the rod body of the lead screw is drawn from a rod having a larger diameter. The sliding door opening and closing device according to any one of claims 2 to 4, wherein the surface of the lead screw is coated with a wear resistant protective layer. The sliding door opening and closing device according to claim 5, wherein the rod of the lead screw is made of an aluminum alloy, and the protective layer is formed of a hard aluminum oxide film formed by anodizing the aluminum alloy. The door height adjusting means according to claim 1, wherein the roller assembly comprises a roller bracket for attaching and supporting the roller and a connecting bracket for connecting the roller bracket with a door, and adjusting the height of the door between the roller bracket and the connecting bracket. Sliding door opening and closing device characterized in that the provided. The method of claim 1, wherein the roller is attached to the roller assembly is a plurality, at least one of which has an eccentric shaft and the center of rotation is moved to the eccentric shaft to be positioned at a different height than the other roller, the rail portion in the guide rail Sliding door opening and closing device is characterized in that the side is formed side by side and the auxiliary rail portion is formed to prevent the separation over the roller having the eccentric shaft. The method according to claim 7, wherein the roller bracket and the connecting bracket is fastened with a plurality of bolt elements as one of the door height adjustment means, one of the bolt elements is formed on the eccentric shaft of the circular cam to be adjusted by the displacement of the circular cam Sliding door opening and closing device characterized in that. The nut holder of claim 1, wherein the link assembly is connected to and fixed to the lead nut and moves together and vertically extends downwardly, and receives the protrusions of the nut holders to be mutually stretchable in the vertical direction and constrained in the opening and closing direction. And a linking member connected to move together, and pivoting means for supporting the roller assembly so that the link member can be rotated and rotated in parallel with the opening and closing direction. The method according to claim 10, wherein the pivoting means, the pivot member for supporting the link member from both sides, one of the pivot member has a bolt-shaped screw, the link member is accommodated in the opening and closing direction while allowing the rotational movement Is a link holder which is constrained to each other and moves together and is constrained in the state of penetrating the two pivot members, respectively, and is fixed to the roller assembly and penetrates the two pivot members that protrude through the link holder, respectively, in the opening and closing direction. A pivot support block which is movably supported by the screw, and an adjustment nut which is fastened to the threaded portion with respect to the pivot support block on which the pivot member having the screw portion is supported is configured to adjust the horizontal position of the door with respect to the lead nut position Sliding door opener. The sliding nut according to claim 10, wherein the lead nut has a hole for fastening the bolt element passing through the nut holder, and a sliding coil is mounted on the hole and is provided with a helical coil capable of elastically fastening the bolt element. Door opener. The sliding door opening and closing device according to claim 1, wherein the guide rail has a guide groove for arranging the motor and the lead screw on the same axis. The sliding door opening and closing device of claim 1, wherein a groove is formed in the guide rail to move the fastening nut so that the motor and the lead screw are aligned and fixed on the same axis line. The guide rail is provided with a guide groove for arranging the motor and the lead screw on the same axis, and a groove for inserting and moving the fastening nut in a direction parallel to the guide groove. Sliding door opening and closing device characterized in that. 2. The guide groove of claim 1, wherein the guide groove is installed in parallel with the guide rail so that the motor and the lead screw can be aligned and arranged on the same axis, and the fastening nut can be inserted in the direction parallel to the guide groove. Sliding door opening and closing device characterized in that the guide rail is provided with a drive side that can be formed groove. The sliding door opening and closing device according to claim 1, further comprising door locking means operable to lock the door after the motor operates to close the door and to release the locked door immediately before the door is operated to open the door. The latch bracket of claim 1, wherein the latch bracket is connected to and fixed to the roller assembly and has a latch hole, a latch member capable of entering and exiting the latch hole of the latch bracket when the door is closed, and a direction in which the latch member advances with respect to the latch hole. A sliding door comprising a solenoid actuator having a plunger actuating the door, comprising a door locking means operable to close the door after the motor is operated to close the door and to release the locked door immediately before acting to open the door. Door opener.

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