JP3540451B2 - Basket door opening and closing mechanism with cord tensioning device - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a car door opening / closing mechanism, and more particularly, to an apparatus for guiding a detection signal transmitting captire cord connected to a switch that detects an operation of a safety shoe of a car door.
[0002]
[Prior art]
FIG. 6 and FIG. 7 show a main part configuration of a conventional elevator car door opening / closing mechanism. FIG. 6 shows a state in which the two car doors 10 and 12 are closed (door closed state), and FIG. 7 shows an opened state (door open state). A fixed shaft 15 that swingably supports the door arm 14 with the front end portion serving as a rotation axis is provided at a distal end portion (right end portion in FIG. 6) of the door arm 14, and a base end portion of the door arm 14 (in FIG. A movable shaft 18 for rotatably connecting the door arm 14 and another door arm 16 to each other is provided at the left end). The fixed shaft 15 is fixed to the car door 10, while the movable shaft is not fixed to the car door 12, so that when the car door opens, the fixed shaft 15 moves to the left in FIG. As a result, the two door arms are folded in two with the movable shaft 18 as a bending point (see FIG. 7).
[0003]
In FIG. 6, a cam 20 for a door engaging device fixedly held by the fixed shaft 15 is provided at a distal end portion of the door arm 14. Specifically, in the closed state of the car door, the extended door arm cam 20 engages with a projection of a vane (not shown) connected to the safety tissue and pushes it out.
[0004]
The switch 22 is constituted by a micro switch or the like, and electrically detects the state when the safety tissue is pressed. Specifically, the movable piece of the switch 22 falls down due to the retraction operation of the safety tissue, and the switch 22 outputs a detection signal.
[0005]
A detection signal from the switch 22 is transmitted to a control unit (not shown) via a captire code (hereinafter, simply referred to as “code”) 24. The cord 24 is disposed along a path from the switch 22 to the door arm 14 and the door arm 16, and is held by saddles 26 to 34 at required places. In this conventional example, each of the saddles 26 to 34 presses and holds a cord.
[0006]
The cord 24 has a "slack" to allow the door arms 14 and 16 to flex. That is, the cord 24 is slackened between the saddle 32 and the saddle 34 so as not to unnecessarily restrict the rotational movement of the movable shaft 18 (see FIG. 6A). to also between the saddle 2 8 and the saddle 30 does not give unnecessarily restricting the inclined operation similarly door arm 14 is slackened the code 24 (see B in FIG. 7).
[0007]
[Problems to be solved by the invention]
As described above, the slack existing in the cord 24 is necessary for the bending operation of the two door arms 14 and 16, while the cord 24 is in the open state of the door as shown in FIG. 7B. The slack portion may enter between the cam 20 and the car door 10 to damage the coating of the cord 24 and hinder its function, or hinder the smooth operation of the door arm 14.
[0008]
Therefore, an object of the present invention is to prevent a problem that a slack portion of a signal transmission cord (a cap tire cord for a safety shoe operation detection switch) unnecessarily pops out while ensuring smooth operation of a door arm.
[0009]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a door arm that bends in conjunction with opening and closing of a car door of an elevator, and a switch that is provided at a side end of the car door and detects an advancing and retreating operation of a safety tissue, A signal transmission cord which is held at a plurality of points on a path along the door arm from the switch and has a slack at a required point which allows the bending movement of the door arm, and which is disposed on the door arm and pulls the slack of the signal transmission cord. And a cord tensioning device for constantly applying tension to the signal transmission code.
[0010]
According to the above configuration, since the cord tensioning device is disposed on the door arm, the cord tensioning device constantly applies tension to the cord while eliminating the slack generated in the cord. In other words, the present invention positively moves the bulge of the cord generated according to the operating state of the car door to another part while giving the cord a required slack, so that the bulge portion of the cord is Is prevented from contacting the member. Therefore, when the door arm is extended, the extension operation is smoothly performed without being restricted by the above-described slack, while, when the door arm is bent, the above-described slack is eliminated by the cord tensioning device, The conventional problem caused by the cord bulging in the vicinity of the cam is naturally and easily solved.
[0011]
In a preferred aspect of the present invention, the cord tensioning device is disposed at a fixed interval, and a pair of guiding means for guiding the signal transmission code, between the pair of guiding means, the pair of guiding means. Pulling means for pulling the signal transmission cord in a direction intersecting the arrangement direction to eliminate the slack.
[0012]
In a preferred aspect of the present invention, the cord tensioning device includes a base plate that is swingably suspended by a swing shaft provided on the door arm, and a base plate that is rotatable at a predetermined interval above the base plate. Arranged, the signal transmission code is hooked from below, between the pair of guide rollers, and the pair of guide rollers, from which the signal transmission code is stretched from above, and the signal transmission code is lowered in a U-shape. Pulling, a pulling roller that eliminates the slack, a weight that is connected to the pulling roller, and that exerts a pulling urging force by its own weight, and a weight unit that is provided on the base plate and that is configured by the pulling roller and the weight is vertically moved. Unit guide means for movably guiding in the direction.
[0013]
In the above-described configuration, the cord wrapped around the pair of guide rollers is pulled downward by the weight unit, thereby eliminating the slack. In this case, the base plate is swingable with respect to the door arm, and the weight unit is always suspended downward regardless of the inclination angle of the door arm. The tension applied to the cord can be adjusted according to the weight of the weight, and is not less than the weight that does not adversely affect the function of the cord and the operation of the door arm. Is set to The use of the weight eliminates the need for an electric drive, and makes it possible to construct an economically advantageous and easily adjustable device.
[0014]
In a preferred aspect of the present invention, a guide device that guides the signal transmission code forward and backward is disposed on the switch side of the cord tensioning device in the door arm.
[0015]
With such a configuration, the cord supporting / guiding action of the guiding device allows the cord tensioning device to smoothly pull in the cord and to pull out the cord from the cord tensioning device accompanying the extension of the door arm.
[0016]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings.
[0017]
FIG. 1 shows a preferred embodiment of a car door opening / closing mechanism according to the present invention, and FIG. In the car door opening / closing mechanism 40 shown in FIG. 1, the same components as those of the conventional configuration shown in FIGS. 6 and 7 are denoted by the same reference numerals.
[0018]
In the car door opening / closing mechanism 40 shown in FIG. 1, the door arm 14 extends in the direction in which the two car doors 10 and 12 are arranged in the same manner as in the related art, and the distal end of the door arm 14 has a fixed shaft 15 fixed to the car door 10. Is rotatably supported. In addition, a cam 20 is provided at the tip as in the conventional case. The base end of the door arm 14 is rotatably connected to the door arm 16 by a movable shaft 18. In the open state of the car door, the door arms 14 and 16 bend as the fixed shaft 15 moves to the left as in the related art.
[0019]
A switch 22 composed of a micro switch or the like is fixedly disposed near the side end of the car door 10, and the switch 22 detects a retreating movement of the safety shoe. Then, the detection signal is transmitted to a control unit (not shown) by the code 24. As shown in FIG. 1, the cord 24 is disposed along a path from the switch 22 through the door arms 14 and 16, and is held and fixed at required places by saddles 26, 28, 32, and 34. . Specifically, the saddle 26 holds and fixes the cord 24 near the sensor 22, and the saddle 28 holds and fixes the cord 24 to the car door 10 near the door arm 14. The saddle 32 is provided near the base end of the door arm 14, and the saddle 34 is provided near the movable shaft 18 of the door arm 16, and holds and fixes the cord 24, respectively. There is a certain slack between the saddle 32 and the saddle 34 as in the related art. This slack allows the two arms 14 and 16 to bend about the fixed shaft 18 as a rotation shaft.
[0020]
Each configuration of the car door opening / closing mechanism 40 described above is basically the same as the conventional configuration shown in FIGS. 6 and 7, but a characteristic configuration of the car door opening / closing mechanism 40 according to the present invention will be described below. .
[0021]
In order to eliminate the slack of the cord 24 shown in FIG. 7B, a cord tensioning device 42 is suspended at the center of the door arm 14 of FIG. That is, the cord tensioning device 42 pulls a part of the cord 24 downward so as to always apply a constant tension to the cord 24 as described later, thereby eliminating the slack of the cord 24 shown in FIG. 7B. Is what you do. The guiding device 4 4 are provided on the door arm 14 to guide and support the code 24 between its cord tensioning device 42 and the saddle 28.
[0022]
In FIG. 1, the cord tensioning device 42 has a built-in weight unit 46 which can be moved up and down, and the weight unit 46 has a weight 48 for applying tension to the cord. The swing shaft 50 connects the cord tensioning device 42 to the door arm 14, and the swinging shaft 50 pivotally supports the cord tensioning device 42 to the door arm 14 as described above. I have. By the action of the weight 48, the cord tensioning device 42 is always suspended in the direction of gravity about the swing shaft 50 as a rotation axis, and is maintained regardless of the inclination angle of the door arm 14.
[0023]
FIG. 2 shows a specific configuration of the cord tensioning device 42. FIG. 2 is a cross-sectional view of a main part of the cord tensioning device 42 as viewed from the side. The swing shaft 50 described above is specifically composed of a bolt 50A and a nut 50B. A unit guide frame 52 is configured to guide the weight unit 46 so as to be able to move up and down. Specifically, the unit guide frame 52 is separated from the rear face plate 54 that forms the base plate by a predetermined distance. And a front plate 56 that is opposed to the front plate 56 and two side plates 58 that connect the rear plate 54 and the front plate 56 laterally. The bolt 50A constituting the swing shaft 50 penetrates the upper end of the rear plate 54 as described above. The unit guide frame 52 conforms to the shape of the weight unit 46 and has a box shape. In this embodiment, the bottom of the unit guide frame 52 is an opening.
[0024]
As shown in FIG. 2, a unit guide path 52A is formed as a hollow inside the unit guide frame 52, and the weight unit 46 moves up and down in the unit guide path 52A. As shown in FIG. 1, the side plate 58 is cut open at its upper part and is opened, thereby forming an opening through which the cord 24 is inserted. Of course, with the inclination of the door arm 14, the reference axis of the cord tensioning device 42 and the reference axis of the door arm 14 become closer in parallel, but at this time, the upper edge of the side plate 58 does not hit the cord 24. It is desirable to set the height. As shown in FIG. 2, between the rear plate 54 and the front plate 56, two fixed guide rollers 60 as a pair of guide means are arranged at a predetermined interval. Each of the fixed guide rollers 60 is rotatably supported on a shaft, and has a thread winding shape in which the center is slightly thinner and the diameter increases toward the end as shown in FIG. The cord 24 is wound around the fixed guide roller 60 from above, and the cord 24 is guided by being positioned at the center of the roller by the unique shape of the fixed guide roller 60. The cord 24 is pulled down by the weight unit 46 between the fixed guide rollers 60. Specifically, the cord 24 is hooked below the movable guide roller 62 built in the weight unit 46, The cord 24 is pulled downward in a U-shape by the movable guide roller 62. Of course, the action is mainly due to the load of the weight 48. The movable guide roller 62 has a shape similar to that of the fixed guide roller 60, that is, the diameter of the central portion is slightly narrower, and the diameter thereof is large toward the end, and the cord 24 is positioned at the central portion of the movable guide roller 62.
[0025]
As shown in FIGS. 1 and 2, the weight unit 46 is hung on the cord 24 spanned between the two fixed guide rollers 60, that is, the load of the weight 48 is transmitted via the movable guide roller 62. This makes it possible to always apply a constant tension to the cord 24. It is understood that the slack (see FIG. 7B) generated when the car door is open as shown in FIG. 7 is effectively removed by the slack eliminating action of the cord tensioning device 42. Of course, the cord tensioning device 42 eliminates the slack in the sense that the cord swells unnecessarily. In other words, the slack existing in the vicinity of the cam 20 is positively pulled to another position by pulling the cord. And the slack exists at a position where the bending movement of the door arm 14 is not hindered.
[0026]
FIG. 3 shows a perspective view of the weight unit 46 as a partial sectional view. Below the weight unit 46, a weight 48 made of, for example, metal is incorporated. Of course, the weight of the weight 48 should be set within a range where slack can be smoothly eliminated and the function of the cord and the movement of the door arm are not adversely affected. In this embodiment, guidance is provided by the guidance device 44 in order to smoothly eliminate slack, which will be described later. On the upper surface plate 64 of the weight unit 46, cutouts 64A forming insertion passages for inserting the cords 24 are formed on both sides thereof. Of course, the function of the weight unit 46 can be realized without providing the upper surface plate 64. However, the provision of the upper surface plate 64 allows the cord 24 to move smoothly while allowing the cord 24 to move smoothly. It is possible to prevent a problem that dust or the like enters and hinders rotation of the movable guide roller 62. As shown in FIG. 3, a wraparound path for the cord 24 is formed between the weight 48 and the movable guide roller 62.
[0027]
The lifting distance of the weight unit 46 in the cord tensioning device 42 depends on the amount of slack generated in the vicinity of the cam 20. Therefore, when such slack is large, the unit guide path 52A is formed vertically long. In this case, even if the lower part of the weight unit 46 partially protrudes from below the unit guide frame 52, such protrusion does not pose a problem if the vertical movement of the weight unit 46 is ensured smoothly. When the lower surface side of the unit guide frame 52 is sealed, the length of the unit guide path 52 is set according to the stroke amount of the weight unit 46 which is correlated with the amount of slack.
[0028]
FIG. 4 is a sectional view of the guide device 44 shown in FIG. 1 as viewed from the side. The guide device 44 is fixed to the door arm 14 by bolts 68A and nuts 68B. Specifically, the upper end of the rear face plate 70 is fixed to the door arm 14. A guide roller 74 having the same shape as the fixed guide roller 60 and the movable guide roller 62 described above is rotatably arranged between the rear plate 70 and the front plate 72, and above the guide roller 74. The cord 24 is wound. The guide roller 74 allows the cord 24 to be smoothly pulled toward the cord tensioning device 42 with the saddle 28 shown in FIG. 1 as a fulcrum. That is, the guide roller 74 constitutes a bending point of the cord 24 between the cord tensioning device 42 and the saddle 28, and when the car door is closed and the door arm 14 is extended, the cord 24 moves to the switch 22 side. On the other hand, when the car door is closed, the movement of the cord 24 to the cord tensioning device 42 side is guided along with the bending of the door arm 14.
[0029]
FIG. 5 shows a state in which the door arms 14 and 16 are bent. As described above, the cord tensioning device 42 is kept upright in the direction of gravity by the weight of the weight unit 46 about the swing shaft 50 as a rotation axis. At this time, the slack generated near the cam 20 is eliminated. This effectively eliminates the problem that the cord 24 is pinched between the cam 20 and the car door, damaging the cord or hindering the movement of the door arm.
[0030]
Each of the saddles 32 and 34 shown in FIG. 1 completely holds and fixes the cord 24, and a slack is formed therebetween as in the related art. However, since the looseness does not cause a problem, the cord is not tensioned in that portion. However, it is possible to provide a cord tensioning device for such a portion as necessary, or various slacks of the cord 24 can be collectively eliminated by one cord tensioning device. Although the cord tensioning device 42 shown in FIG. 1 is provided at the center of the door arm 14, it can be moved leftward or rightward along the door arm. In this case, if the position is too close to the cam 20, the structure of that portion becomes complicated or the operation of the cam 20 is hindered. Conversely, if the position is too close to the movable shaft 18, the swing of the door arm 14 is caused. Since an excessive load is applied to the end side, the location of the cord tensioning device 42 should be selected in consideration of such conditions. The cord tensioning device 42 of this embodiment is economical because it does not require an electric drive, and has a very simple structure in which tension is applied by the action of a weight, so that the cost can be reduced.
[0031]
【The invention's effect】
As described above, according to the present invention, the slack of the cord can be eliminated by the cord tensioning device and tension can be constantly applied to the signal transmission cord, so that the slack of the signal transmission cord caused by the movement of the door arm can be reduced. The problem caused by the conventional cord slack can be solved by eliminating the tension. Further, according to the present invention, there is an advantage that a tension urging force can be exerted by the weight of the weight, and an economical cord tensioning device can be formed since no electric driving means is required. Therefore, according to the present invention, an elevator that is economical and has high safety can be configured.
[Brief description of the drawings]
FIG. 1 is a diagram showing a main configuration of a car door opening / closing mechanism according to the present invention.
FIG. 2 is a sectional view of the cord tensioning device as viewed from the side.
FIG. 3 is a perspective view of a weight unit.
FIG. 4 is a side view of the guide device.
FIG. 5 is a diagram illustrating a bent state of a door arm.
FIG. 6 is a view showing a main part of a conventional car door opening / closing mechanism. FIG. 7 is a view showing a slack of a cord in the conventional car door opening / closing mechanism.
[Explanation of symbols]
10, 12 car door, 14, 16 door arm, 24 cap tire cord (signal transmission cord), 42 cord tensioning device, 44 guide device, 46 weight unit.

Claims (3)

A door arm that bends in conjunction with the opening and closing of the elevator car door,
A switch that is provided at a side end of the car door and detects an advance / retreat operation of the safety tissue;
Held at a plurality of positions on the path along the door arm from the switch, a signal transmission code to have a slack that allows the bending movement of the door arm,
A cord tensioning device that is disposed on the door arm and eliminates slack of the signal transmission code to constantly apply tension to the signal transmission code;
A guide device disposed between the switch and the cord tensioning device, for guiding the signal transmission code to the cord tensioning device so as to be able to advance and retreat;
A car door opening / closing mechanism provided with a cord tensioning device. The car door opening / closing mechanism according to claim 1,
The cord tensioning device is
A pair of guide means arranged at regular intervals, for guiding the signal transmission code,
Between the pair of guide means, a pulling means for eliminating the slack by pulling the signal transmission code in a direction intersecting the arrangement direction of the pair of guide means,
A car door opening / closing mechanism provided with a cord tensioning device. The car door opening / closing mechanism according to claim 1,
The cord tensioning device is
A base plate suspended swingably by a swing shaft provided on the door arm,
A pair of guide rollers, which are rotatably arranged at regular intervals on the upper portion of the base plate, and over which the signal transmission code is laid;
A tension roller between the pair of guide rollers, wherein the signal transmission code is hooked from below and pulls the signal transmission code downward in a U-shape to eliminate the slack;
A weight connected to the pulling roller and exerting a pulling biasing force by its own weight;
Unit guide means provided on the base plate, for guiding a weight unit composed of the pulling roller and the weight so as to be movable in the vertical direction,
A car door opening / closing mechanism provided with a cord tensioning device.

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