JP5448130B2 - Elevator door opening and closing device - Google Patents

Description

  The present invention relates to an elevator door opening / closing device that opens and closes a car door provided in an elevator car.

  As shown in FIG. 8, the elevator is provided with a hoistway 1 in the building, an entrance 2 is provided at a desired height position of the hoistway 1, a landing 3 is provided facing the entrance 2, and the elevator A landing door 4 is provided at the entrance 2, and a car 6 is provided in the hoistway 1 so that it can be raised and lowered by a driving device (not shown). The car 6 is also provided with an entrance 7, and the car door is provided at the entrance 7. 8 is provided. The general elevator is provided with an engaging portion 9 on the car door 8 so as to protrude toward the landing door 4, while being engaged with the landing door 4 so as to protrude toward the car door 8. When the car 6 arrives at the position of the landing 3, the engaging portion 9 and the engaged portion 5 are engaged, and the car door 8 is opened and closed by the door opening and closing device provided on the car 6 side. Accordingly, the landing door 4 is also opened and closed together.

  As shown in FIG. 9, this type of door opening / closing device includes a drive motor 30 attached to the upper surface of the upper frame 10 extending along the front-and-rear direction of the entrance / exit 7 of the car 6 (the left-right direction in FIG. 9), and the upper frame 10. A speed reduction pulley 32 attached to one end of the front surface of the motor, and a speed reduction pulley 32 having a diameter larger than that of the motor pulley 31 attached to the drive shaft of the drive motor 30, and provided coaxially and integrally with the speed reduction pulley 32. Drive pulley 33, driven pulley 34 attached to the other end of the front face of upper frame 10, speed reduction belt 35 comprising an endless belt wound between motor pulley 31 and speed reduction pulley 32, drive pulley 33 and driven pulley And a drive belt 36 composed of an endless belt wound around 34.

  Further, the door rail 11 is attached to the front surface of the upper frame 10, and the car door 8 has a pair of rollers 13 and 13 attached to the door hanger 12 placed on the door rail 11, thereby allowing the door rail 11 to pass through the door hanger 12. In this state, the car door 8 is coupled to the drive belt 36 of the door opening / closing device via the door hanger 12 and the coupling tool 37 attached to the door hanger 12.

  Therefore, when the motor pulley 31 is rotated by the drive motor 30, the rotation is transmitted to the speed reduction pulley 32 via the speed reduction belt 35, and the drive pulley 33 is rotated together with the speed reduction pulley 32. The car door 8 reciprocates along the door rail 11 via the tool 37 and the door hanger 12, and the car door 8 is opened and closed. In the elevator shown in FIG. 9, one car door 8 is connected to one side of the drive belt 36 and the other car door 8 is connected to the other side of the drive belt 36. , 8 move in directions opposite to each other. That is, the elevator shown in FIG. 9 is a so-called center open type elevator in which the doorway 7 of the car 6 opens from the center.

Japanese Patent Laid-Open No. 2002-37574

  By the way, in the said conventional door opening / closing apparatus, since the drive motor 30 is attached to the upper surface of the upper frame 10, there exists a problem that the height dimension of the cage | basket | car 6 whole becomes large. As a means for solving such a problem, the drive motor 30 is disposed so as not to protrude upward from the upper surface of the upper frame 10. Specifically, the drive motor 30 is attached to the front surface of the upper frame 10 via a bracket, for example. Thus, a method of arranging the drive motor 30 on the front side of the upper frame 10 is extremely effective.

  However, new problems are expected to arise from such methods. This is a problem when maintenance personnel perform maintenance inspections of elevators.

  Usually, the maintenance procedure of the elevator performed by the maintenance staff is to get into the car 6 first, switch the operation switch in the car 6 to manual, and engage the engagement portion 9 of the car door 8 and the landing door 4 The car 6 is lowered to a position where the part 5 does not engage. Then, the car door 8 and the landing door 4 are opened to go to the landing 3. Next, after connecting the maintenance operation device to the control device provided above the car 6, the short circuit switch of the maintenance operation device is pushed to short-circuit all the switches of the landing doors 4. Next, the lowering button of the maintenance operation device is pushed to lower the car 6 from the landing 3 to a position where it can get on the car 6. In this state, after removing the maintenance operation device, getting on the car 6 and reconnecting the maintenance operation device, the maintenance operation of the equipment in the hoistway 1 is performed while operating the maintenance operation device on the car 6. To go. In addition, when the work on the car 6 is completed, or prior to this, maintenance inspection of the door opening / closing device is performed from the landing 3 with the landing door 4 opened.

  Therefore, when the drive motor 30 is attached to the front surface of the upper frame 10 via a bracket according to the above-described method, the drive motor 30 or the bracket is used as a scaffold when the maintenance person gets on the car 6 from the landing 3. End up. If so, an excessive load is applied to the bracket, the bracket bends, the drive motor 30 is tilted, the core of the drive shaft (motor pulley 31) of the drive motor 30 is displaced, and the door opening / closing device may malfunction.

  The present invention has been made in view of such a problem. Even if the drive motor is attached to the front of the upper frame via a bracket in order to suppress the overall height of the car, the drive motor The present invention provides an elevator door opening / closing device that can suitably prevent the bracket structure from being used as a scaffold.

In order to solve the above-described problems, an elevator door opening / closing apparatus according to the present invention is an elevator door opening / closing device in which a car door is provided at an entrance / exit of a car, and a drive motor is connected to the car door via a transmission mechanism. In the door opening and closing device, the drive motor is attached to the front of the upper frame provided above the entrance of the car via a bracket, and the bracket is in an inclined state around an axis orthogonal to the front of the upper frame. The drive motor is attached to the front surface of the frame, and the drive motor is attached to the lower surface of the bracket .

  According to such a configuration, the bracket is inclined around an axis orthogonal to the front surface of the upper frame, and the drive motor is positioned on the lower side of the bracket, so that the upper part of the drive motor-bracket structure, that is, the upper surface of the bracket. Is inclined. For this reason, when the maintenance staff gets on the car during the maintenance and inspection of the elevator, even if they try to put their feet on the upper surface of the bracket, they cannot get on well. Since the maintenance staff avoids such a state, the bracket can be suitably prevented from being used as a scaffold.

  In this case, the bracket is arranged on the front surface of the upper frame such that the mounting portion on the front surface of the upper frame and the mounting portion of the drive motor are disposed on the inner side of the opening line that defines the entrance width of the cage. Preferably it is attached.

  According to such a configuration, the work for removing the bracket from the front of the upper frame or the work for removing the drive motor from the bracket can be performed from the landing with the landing door open, so that the work efficiency of the work can be increased. .

In the elevator door opening and closing apparatus according to the present invention, the bracket has an inclined portion inclined with respect to a horizontal direction orthogonal to the front surface of the upper frame, and the drive motor is attached to the lower surface of the bracket. It can be constituted as follows.

According to such a configuration, the bracket has the inclined portion that is inclined with respect to the horizontal direction orthogonal to the front surface of the upper frame, and the drive motor is located on the lower side of the bracket. The upper part, that is, the upper surface of the bracket is inclined. For this reason, when the maintenance staff gets on the car during the maintenance and inspection of the elevator, even if they try to put their feet on the upper surface of the bracket, they cannot get on well. Since the maintenance staff avoids such a state, the bracket can be suitably prevented from being used as a scaffold.

  In the elevator door opening / closing apparatus according to the present invention, the drive motor housing may be formed in a circular or substantially circular shape, and the drive motor may be attached to the upper surface of the bracket.

According to such a configuration, the housing of the drive motor is formed in a circular or substantially circular outer shape of the drive motor rounded, and, when the drive motor is positioned on the upper side of the bracket, when maintenance of elevators, When maintenance personnel get on the car, they are unable to put their feet on the outer surface of the drive motor. Since the maintenance staff avoids such a state, the drive motor can be suitably prevented from being used as a scaffold.

  In the elevator door opening and closing device according to the present invention, the transmission mechanism includes a driving pulley attached to one end of the front of the upper frame, a driven pulley attached to the other end of the front of the upper frame, and a driving pulley. And an endless drive belt wound around the driven pulley and locking the car door, and the drive motor is preferably attached to the front surface of the upper frame so as to directly connect the drive pulley.

  According to such a configuration, it is possible to eliminate the configurations of the motor pulley, the reduction pulley, and the reduction belt in the conventional door opening and closing device, thereby improving the maintainability and reducing the number of parts, thereby reducing man-hours and costs. it can.

  As described above, according to the present invention, even if the drive motor is attached to the front surface of the upper frame via the bracket in order to suppress the overall height of the car, the upper portion of the drive motor-bracket structure is inclined. Therefore, it is possible to suitably prevent the drive motor-bracket structure from being used as a scaffold during maintenance and inspection of the elevator.

It is a front view of the elevator car which concerns on this embodiment, Comprising: The state which closed the car door is shown. The side view of the front side of the same car is shown. It is a front view of the same car, and shows a state where the car door is opened. The principal part front view of the door opening / closing apparatus provided in the upper part of the same cage | basket | car is shown. It is an attachment state figure of the drive motor in the door opening and closing apparatus, Comprising: The AA sectional view taken on the line of FIG. The attachment state figure of the drive motor concerning other embodiments is shown. The attachment state figure of the drive motor concerning another embodiment is shown. The cross-sectional top view of the conventional elevator is shown. The front view of the elevator car is shown.

  Hereinafter, an embodiment of an elevator door opening and closing apparatus according to the present invention will be described with reference to the drawings. Of the configurations appearing in the present embodiment, configurations that are the same as or correspond to those in the prior art shown in FIGS. 8 and 9 are denoted by the same reference numerals.

  First, the outline | summary of the elevator which concerns on this embodiment is demonstrated, referring FIGS. 1-3. The elevator according to the present embodiment is a so-called side open type elevator in which the doorway 7 of the car 6 opens from the end. That is, the elevator according to the present embodiment has a structure in which the pair of car doors 8 and 8 move in the same direction, but one car door 8 moves more than the other car door 8. One of the car doors 8 is generally called “first door” because it has a large amount of movement, that is, has a high moving speed. The other car door 8 is generally called a “slow door” because it has a small amount of movement, that is, its movement speed is low. Hereinafter, for the sake of convenience, “f” is added to the configuration related to the first door, and “s” is added to the configuration related to the slow door.

  The car door 8f is suspended from the door rail 11f via the door hanger 12f by placing a pair of rollers 13f and 13f attached to the door hanger 12f on the door rail 11f. The car door 8s is suspended from the door rail 11s via the door hanger 12s by placing a pair of rollers 13s and 13s attached to the door hanger 12s on the door rail 11s. The door rail 11 s is directly attached to the front surface of the upper frame 10. On the other hand, the door rail 11 f is attached to the front surface of the upper frame 10 via the bracket 14. Accordingly, the door rail 11s is first arranged on the front surface of the upper frame 10, and then the door rail 11f is arranged. Therefore, the car door 8f is disposed at a position offset to the front side from the car door 8s. Therefore, when the car doors 8f and 8s are opened, the car doors 8f overlap with each other so that the car door 8s covers the car doors 8s.

  Similar to the center open type, the car door 8f is connected to a drive belt 36 of a door opening / closing device via a door hanger 12f and a connector 37 attached to the door hanger 12f. On the other hand, the car door 8s is connected to the car door 8f via a speed reduction mechanism.

  The speed reduction mechanism is an arm 15 that extends along the opening direction of the entrance / exit 7 of the car 6, the arm 15 attached to the door hanger 12 s of the car door 8 s, and the arm 15 attached to one end side and the other end side of the arm 15. A pair of reduction pulleys 16, 16, a reduction wire 17 composed of an endless wire wound between the pair of reduction pulleys 16, 16, and an upper frame for fixing a part of the reduction wire 17 to the upper frame 10 10 and a bracket 18 attached to the front surface. The car door 8f is connected to the speed reduction wire 17 of the speed reduction mechanism via a door hanger 12f and a connector 38 attached to the door hanger 12f.

  Therefore, when the drive belt 36 circulates by the drive motor 30, the car door 8f moves along the door rail 11f via the door hanger 12f. At this time, the speed reduction wire 17 circulates, and accordingly, the arm 15 and the door hanger 12s are moved. Then, the car door 8s moves along the door rail 11s and at half the speed of the car door 8f, and the car doors 8f and 8s are opened and closed.

  Note that a guide shoe 19 is provided at the lower end of each of the car doors 8f and 8s. The guide shoe 19 is fitted into a groove formed in the car sill (car floor surface) 20, and slides in the groove as the car doors 8f and 8s are opened and closed.

  Here, the door opening and closing apparatus according to the present embodiment includes a drive motor 30 disposed on one end of the front surface of the upper frame 10, a drive pulley 33 attached to a drive shaft of the drive motor 30, and the upper frame 10. A driven pulley 34 attached to the other end of the front surface, and a drive belt 36 composed of an endless belt wound around the drive pulley 33 and the driven pulley 34 are provided.

  As shown in FIGS. 4 and 5, the drive motor 30 is attached to the front surface of the upper frame 10 via a bracket 39. Therefore, the overall height of the car 6 can be reduced as compared with the conventional door opening and closing device in which the drive motor 30 is attached to the upper surface of the upper frame 10.

  The drive motor 30 is a so-called direct drive in which a drive pulley 33 is directly connected to the drive shaft. Therefore, each configuration of the motor pulley 31, the speed reduction pulley 32, and the speed reduction belt 35 in the conventional door opening and closing device can be eliminated, so that maintainability can be improved and the number of parts can be reduced to reduce man-hours and costs. it can.

  The bracket 39 includes a base portion 39a and an extending portion 39b connected to the base portion 39a and extending from the base portion 39a. The base 39a has a flat plate shape, and the extending portion 39b has a flat plate shape. The extended portion 39b is formed in an L-shaped cross section by connecting the base end thereof to the front end of the base portion 39a (so as to be orthogonal).

  The base portion 39a has through holes formed at appropriate places. Therefore, the bracket 39 is attached to the front surface of the upper frame 10 by the fastener 40 by passing a bolt through the through hole and the through hole also formed in the upper frame 10 and tightening the nut. In the present embodiment, a plurality of through holes are formed at intervals in an arc shape with the drive shaft of the drive motor 30 as the center.

  Through holes 39b are also formed at appropriate locations in the extending portion 39b. Therefore, a bolt is passed through the through hole and a through hole formed in the collar 41 interposed between the extending portion 39b and the drive motor 30, and the bolt is screwed into a female screw formed in the housing of the drive motor 30. Thus, the drive motor 30 is attached to the lower surface of the bracket 39 via the collar 41 by the fastener 42. The collar 41 is interposed in order to absorb the difference in shape between the lower surface of the extending portion 39b that is a flat surface and the outer surface of the housing of the drive motor 30 that is circular. One surface is a flat surface and the other surface is a concave arc surface. In the present embodiment, the drive motor 30 is attached to the front surface of the upper frame 10 such that the drive pulley 33 faces the front surface of the upper frame 10. In the present embodiment, a plurality of through holes are formed at intervals in the drive shaft direction of the drive motor 30.

  The bracket 39 is attached to the front surface of the upper frame 10 in an inclined state around an axis orthogonal to the front surface of the upper frame 10. More specifically, the bracket 39 is arranged so that the mounting portion on the front surface of the upper frame 10 is disposed on the inner side (closer to the entrance / exit 7) than the opening line L that defines the opening width of the entrance / exit 7 of the car 6. 10 is attached to the front. Specifically, the bracket 39 is configured so that all of the plurality of fasteners 40,... For fixing the bracket 39 to the front surface of the upper frame 10 are disposed on the inner side (closer to the entrance / exit 7) than the opening line L. It is attached to the front surface of the upper frame 10.

  Further, as a result of mounting the bracket 39 in such an inclined state, the mounting portion of the drive motor 30 is also arranged on the inner side (closer to the entrance / exit 7) than the opening line L. Specifically, all of the plurality of fasteners 42,... For fixing the drive motor 30 to the bracket 39 are disposed on the inner side (closer to the entrance / exit 7) than the opening line L.

  As described above, according to the door opening and closing apparatus according to the present embodiment, the bracket 39 is inclined about the axis orthogonal to the front surface of the upper frame 10 and the drive motor 30 is positioned below the bracket 39, whereby the drive motor The upper part of the 30-bracket 39 structure, that is, the upper surface of the bracket 39 is inclined. Therefore, when the maintenance person gets on the car 6 in the state where the car 6 is lowered from the landing 3 to a position where the car 6 can be put on the car 6 in the maintenance and inspection of the elevator, I ca n’t put my foot on well. Since the maintenance staff avoids such a state, the bracket 39 can be suitably prevented from being used as a scaffold.

  Therefore, according to the door opening and closing apparatus according to the present embodiment, an excessive load is applied to the bracket 39, the bracket 39 is bent, the drive motor 30 is tilted, and the core of the drive shaft (drive pulley 33) of the drive motor 30 is tilted. It can prevent suitably that a malfunction arises in a slippage and a door opening and closing device.

  Further, according to the door opening and closing apparatus according to the present embodiment, the bracket 39 includes an attachment portion (attachment portion by the fastener 40) to the front surface of the upper frame 10 and an attachment portion (attachment portion by the fastener 42) of the drive motor 30. Is disposed on the inner side of the opening line L so that the drive motor 30 is removed from the bracket 39 or the subsequent bracket 39 from which the drive motor 30 is removed is attached to the front surface of the upper frame 10. The work of removing from the front of the upper frame 10 is possible from the landing 3 with the landing door 4 opened. Therefore, the work efficiency of such work can be increased.

  The elevator door opening and closing device according to the present invention is not limited to the above embodiment, and various modifications can be made without departing from the gist of the present invention.

  For example, in the above embodiment, the entire bracket 39 is attached in an inclined state, but the entire bracket 39 is attached in a horizontal state, and instead, the extending portion 39b is inclined with respect to the base portion 39a. May be. Specifically, the entire extension part 39b is inclined with respect to the base part 39a, or at least the distal end side 39b ′ of the extension part 39b is inclined with respect to the base part 39a as shown in FIG. It is made to the state.

According to this configuration, the bracket 39 has the inclined portion 39 b ′ that is inclined with respect to the horizontal direction ( axial direction ) orthogonal to the front surface of the upper frame 10, and the drive motor 30 is positioned below the bracket 39. Thus, the upper portion of the drive motor 30-bracket 39 structure, that is, the upper surface of the bracket 39 is inclined. Therefore, when the maintenance person gets on the car 6 with the car 6 lowered from the landing 3 to a position where the car 6 can be put on the car 6 in the maintenance inspection of the elevator, I ca n’t put my foot on well. Since the maintenance staff avoids such a state, the bracket 39 can be suitably prevented from being used as a scaffold. Moreover, since the fastener 42 comes to face the front side, the work efficiency of the operation | work which tightens the fastener 42 and loosens can be improved.

  In such a configuration, the housing of the drive motor 30 is attached so that the drive motor 30 is attached to the extending portion 39b that is inclined in a correct posture (a horizontal posture in which the drive shaft of the drive motor 30 is horizontal). Is formed so that the corresponding portion becomes an inclined surface, or the housing of the drive motor 30 is the same as that of the above embodiment, and the collar 41 has an inclined surface and one of the opposing surfaces. Are formed to be concave arcuate surfaces.

  Further, such a configuration can be used in combination with the configuration of the above embodiment. That is, the bracket 39 has an inclined portion 39 b ′ that is inclined with respect to an axial direction orthogonal to the front surface of the upper frame 10, and is inclined about an axis orthogonal to the front surface of the upper frame 10. The drive motor 30 may be attached to the lower surface (of the inclined portion 39b ′) of the bracket 39.

  In the above embodiment, the entire bracket 39 is attached in an inclined state. However, as shown in FIG. 7, the entire bracket 39 is attached in a horizontal state, and is attached to the upper surface of the extending portion 39b of the bracket 39 (the collar 41). The drive motor 30 may be mounted (via).

  According to such a configuration, the housing of the drive motor 30 is formed in a circular or substantially circular shape, the outer shape of the drive motor 30 is rounded, and the drive motor 30 is positioned on the upper side of the bracket 39, so that the drive motor 30. -The upper part of the bracket structure 39, that is, the outer surface of the drive motor 30, is inclined. Therefore, when the maintenance person gets on the car with the car 6 lowered to the position where the car 6 can be put on the car 6 during the maintenance inspection of the elevator, even if the maintenance person tries to get on the outer surface of the drive motor 30 I ca n’t put my foot on well. Since the maintenance staff avoids such a state, the drive motor 30 can be suitably prevented from being used as a scaffold.

  Moreover, in the said embodiment, although a side open type is employ | adopted, a center open type may be sufficient like the said conventional elevator. Further, the side open type may be an elevator to which three or more car doors 8 are attached instead of the two car doors 8 and 8, and the center open is also 2 on each side. A plurality of car doors 8 and 8 may be provided.

  In the above embodiment, the drive shaft of the drive motor 30 is directly connected to the drive pulley 33 that rotates the drive belt 36. However, instead of such a direct drive system, the drive motor 30 is connected to the drive pulley 33. The motor pulley is attached to the drive shaft of the drive motor 30, the speed reduction pulley is coaxially and integrally attached to the drive pulley 33, and the speed reduction belt is wound between the motor pulley and the speed reduction pulley. A mechanism such as a door opening / closing device may be used.

  In the above embodiment, a combination of the drive pulley 33, the driven pulley 34, the drive belt 36, and the coupling tool 37 is employed as a transmission mechanism that transmits the driving force of the drive motor 30 to the car door 8. A known transmission mechanism such as a link mechanism can be employed.

  Moreover, in the said embodiment, although the housing of the drive motor 30 is formed circularly, it is not strictly circular and includes polygons such as an ellipse, a hexagon, and an octagon.

  In the above embodiment, the upper frame 10 includes the vertical portion 10a and the horizontal portion 10b extending from the upper end of the vertical portion 10a to the back side. However, the horizontal portion 10b may not be provided. .

  DESCRIPTION OF SYMBOLS 1 ... Hoistway, 2 ... Entrance / exit, 3 ... landing, 4 ... landing door, 5 ... engaged part, 6 ... car, 7 ... entrance / exit, 8 ... car door, 9 ... engaging part, 10 ... upper frame, 10a ... vertical part, 10b ... horizontal part, 11 ... door rail, 12 ... door hanger, 13 ... roller, 14 ... bracket, 15 ... arm, 16 ... reduction pulley, 17 ... reduction wire, 18 ... bracket, 19 ... guide shoe, 20 ... Car sill, 30 ... drive motor, 33 ... drive pulley, 34 ... driven pulley, 36 ... drive belt, 37,38 ... connector, 39 ... bracket, 39a ... base, 39b ... extension part, 40 ... fastener, 41 ... Color, 42 ... Fastener, L ... Opening line

Claims (5)

In an elevator door opening and closing device in which a car door is provided at a car doorway so as to be freely opened and closed, and a drive motor is connected to the car door via a transmission mechanism.
The drive motor is attached via a bracket to the front of the upper frame provided above the car doorway,
The elevator door opening and closing device characterized in that the bracket is attached to the front surface of the upper frame in an inclined state about an axis orthogonal to the front surface of the upper frame, and the drive motor is attached to the lower surface of the bracket . The bracket is attached to the front surface of the upper frame such that the attachment portion to the front surface of the upper frame and the attachment portion of the drive motor are disposed on the inner side of the opening line that defines the width of the entrance of the cage. The elevator door opening and closing device according to Item 1 . In an elevator door opening and closing device in which a car door is provided at a car doorway so as to be freely opened and closed, and a drive motor is connected to the car door via a transmission mechanism.
The drive motor is attached via a bracket to the front of the upper frame provided above the car doorway,
The bracket has an inclined portion inclined with respect to the horizontal direction perpendicular to the front of the upper frame, said drive motor, elevator door opening and closing device, characterized in that attached to the lower surface of the bracket. In an elevator door opening and closing device in which a car door is provided at a car doorway so as to be freely opened and closed, and a drive motor is connected to the car door via a transmission mechanism.
The drive motor is attached via a bracket to the front of the upper frame provided above the car doorway,
The elevator motor door opening and closing device is characterized in that a housing of the drive motor is formed in a circular or substantially circular shape, and the drive motor is attached to an upper surface of the bracket. The transmission mechanism is wound between a driving pulley attached to one end of the front of the upper frame, a driven pulley attached to the other end of the front of the upper frame, and between the driving pulley and the driven pulley to lock the car door. The elevator door opening / closing device according to any one of claims 1 to 4 , wherein the drive motor is attached to a front surface of the upper frame so as to directly connect a drive pulley.

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