JP2001206666A - Base isolation escalator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a base isolation escalator capable of being installed between an upper story and a lower story having large relative position displacement and allowing stable base isolation response by pinching base isolation layers between the main frame of an escalator body and floor sections. SOLUTION: One end in the longitudinal direction of the inclined main frame 29 is supported on the upper story, the other is supported on the lower story, and a passenger transportation path of a straight line M is constructed in the longitudinal direction of the main frame 29 in this escalator. The main frame 29 is supported on the floor sections 35 of the upper story and the lower story via base isolation sections 43. Each base isolation section 43 is provided with a support shaft 47 provided on the floor section 35 rotatably around the vertical axis, a straight track (not shown in Fig.) fixed to the upper end of the support shaft 47 at one end, a roller (not shown in Fig.) provided on the main frame 29 and rolled on the straight track, and a support lever 67 guiding the roller in the longitudinal direction of the straight track. The longitudinal axis Q of the straight track crosses the longitudinal axis N of the main frame 29 of the escalator at the prescribed angle θ.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a seismic isolation escalator provided on an upper floor and a lower floor of a building structure with a seismic isolation layer interposed therebetween.

[0002]

2. Description of the Related Art Escalators are installed in various buildings such as goods sales stores, station buildings, hotels, hospitals, and public facilities. Conventional very common escalators are shown in FIG.
As shown as an escalator 1 in (first known example), an endless circulation path 3, a drive mechanism (not shown) for operating the circulation path 3, and left and right sides of the circulation path 3 are provided. It mainly includes a side plate 5 and an endless handrail belt 7 that goes around the outer periphery of the side plate 5. The circulation path 3, the driving mechanism, the side plate 5, the handrail belt 7 and the like are supported and fixed to the main frame 9. The main frame 9 is erected over the upper floor and the lower floor. The main frame 9 passes through an opening 13 opened in the floor 11 on the upper floor, and supports one end in the longitudinal direction on the floor 11 on the upper floor, and opens the other end on the floor 15 on the lower floor. (See, for example, Japanese Patent Application Laid-Open No.
No. 13572). In addition, a seismic isolation escalator that has emerged due to recent advances in building technology, as shown in a plan view of a seismic isolation escalator 91a in FIG. 11 (second known example), has one end in the longitudinal direction of a main frame 29a of the escalator main body 21a. Is installed on the floor 35a of the upper floor 31a, the seismic isolation part 43a is interposed between the end of the main frame 29a and the floor 35a in the vertical direction. The seismic isolation part 43a is provided with a long seismic isolation support rod 67a along the parallel line Na of the longitudinal straight line Ma of the plane of the escalator main body 21a, and the longitudinal straight line Mb of the plane is aligned with the parallel line Na to mutually intersect. Are arranged in parallel, and the seismic isolation is realized by the rotation of the support rod 67a.
No. 527).

[0003]

The conventional escalator is generally installed between an upper floor and a lower floor, which are of an integral structure, and the sliding range of the supporting portion is small (10).
The configuration of the first known example was sufficient. However, in recent years, the demand for a building having a seismic isolation function is rapidly increasing. These buildings may have a seismic isolation layer between the upper and lower floors. However, a larger displacement absorption interval (about 450 mm) is required between the upper floor and the lower floor sandwiching the seismic isolation layer than in the case of an integrated structure. Therefore,
When the main frame is supported by the conventional support portion, the relative displacement between the upper and lower floors exceeds the sliding range, and the main frame falls off the receiving member. For this reason, it is desired to develop an escalator similar to the second known example that can be installed with the seismic isolation layer interposed therebetween, and a concrete configuration has appeared. This configuration is, as shown in FIG.
The escalator body 2 is mounted on the floor 35a of the upper floor 31a where the escalator body 21a having the main frame 29a is installed.
An opening is formed to insert 1a, and a displacement absorption interval Ca for seismic isolation is formed here. Here, 87a is a tread. One end of the main frame 29a is supported on the floor 35a via the seismic isolation part 43a. Furthermore, the seismic isolation part 43a
Is a support shaft 4 which is rotatably engaged about a vertical axis.
7a is provided in the step of the floor 35a. Support shaft 47a
Is provided with a relatively long and cantilevered support rod 67a that freely rotates about the support shaft 47a as the displacement absorption interval Ca increases and decreases to cope with seismic isolation. The same applies to the lower floor not shown. However, in this configuration, at the moment when the support rod 67a starts to rotate, which is a point corresponding to the seismic isolation by the support rod 67a, the longitudinal direction of the support rod 67a with respect to the longitudinal straight line Ma of the escalator main body 21a and the parallel line Na with it. Since the straight line Mb is in a parallel state that completely matches, the upper floor 3
When the escalator body 21a moves in the direction of the arrow Aa (the same applies to the direction of the arrow Aaaa of the escalator body 21a), there occurs a tug-of-war state on the parallel line Na and the longitudinal straight line Mb. There remains an uneasy factor that the seismic isolation part 43a may be damaged by force.

SUMMARY OF THE INVENTION The object of the present invention is to improve the above-mentioned second known example, in which the relative position displacement between the upper floor and the lower floor is increased by sandwiching the seismic isolation layer. It is an object of the present invention to provide a seismic isolation escalator that can be erected and can stably support seismic isolation.

[0005]

In order to achieve the above object, at least one end of a main frame is supported on a floor on an upper floor or a lower floor via a seismic isolation part, and the seismic isolation part is provided on the floor part. A support shaft provided rotatably around a vertical axis, a linear track orthogonal to the support shaft, and one end of which is fixed to an upper end of the support shaft; and A roller that rolls on a linear track, and a support rod that guides the roller unit in the longitudinal direction of the linear track, and has a predetermined angle between the longitudinal axis of the linear track and the longitudinal axis of the escalator main frame. Cross.

In this seismic isolation escalator, one end of the main frame is supported on the upper floor via a seismic isolation part, and the other end is supported on the lower floor via a seismic isolation part. For example, when the escalator moves along the straight line in the longitudinal direction between the upper floor and the lower floor and a relative displacement occurs, the support rod provided on the floor is stabilized by the effect of the non-parallel intersection angle. Then, the roller portion further rolls on the track surface of the support rod, and the relative displacement is absorbed. That is, even if a relative displacement occurs, the main frame is always supported by the floor via the seismic isolation part, and does not fall off the floor.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a seismic isolation escalator according to the present invention will be described below with reference to the drawings. FIG. 1 is a side view of a seismic isolation escalator according to an embodiment of the present invention, FIG. 2 is an external front view of the seismic isolation escalator of FIG. 1, FIG. XX of
FIG. 5 is a sectional view taken along line YY of FIG. The escalator body 21 is provided with an endless circulation path 2.
3, a driving mechanism (not shown) for operating the circulation path 23, and side plates 25 provided on the left and right sides of the circulation path 23.
And an endless handrail belt 27 circling the outer periphery of the side plate 25. The circulation path 23, the driving mechanism, the side plate 25, the handrail belt 27 and the like are supported and fixed to the main frame 29. A seismic isolation part 43 is provided between the upper floor 31 and the lower floor 33 where the escalator body 21 is installed.
Openings 39 and 41 through which the escalator body 21 is inserted are respectively provided on the floor 35 of the upper floor 31 and the floor 37 of the lower floor 33.
To form Between the openings 39, 41 and the main frame 29,
A displacement absorption interval C (for example, about 250 mm) for seismic isolation is formed. One end of the main frame 29 is supported on the floor 35 of the upper floor 31 via the seismic isolation part 43. The other end of the main frame 29 is supported on the floor 37 of the lower floor 33 via the seismic isolation part 43. As shown in FIG. 3, two seismic isolation units 43 are provided in the width direction of one end and the other end of the main frame 29 (the width direction of the circulation path 23). That is, the main frame 29 is supported by the floor 35 and the floor 37 via the four seismic isolation parts 43 at the top and bottom.

As shown in FIG. 4, steps 45 are formed in the openings of the floors 35 and 37. The step portion 45 is provided with a support shaft 47 that is rotatable around a vertical axis. The lower part of the support shaft 47 is inserted into the concave bearing 49. A bearing seat 51 is provided on the bottom surface of the bearing 49. Cross section V at the center of the seat 51
A U-shaped groove 53 is formed. A tapered shaft core 55 is provided vertically at the center of the lower surface of the support shaft 47. The shaft core 55 enters the recess 53 and is rotatably supported. Support shaft 47 in bearing 49
, A flange portion 57 is formed above the shaft center 55.
On the lower surface of the flange portion 57, a plurality of concave portions 59 are formed on the concentric circle of the shaft core 55 at regular intervals in the circumferential direction. Also, on the upper surface of the receiving seat 51, a plurality of concave portions 59 are formed at equal intervals in the circumferential direction on the concentric circle of the concave groove 53. A steel ball 61 is inserted between the concave portion 59 of the flange portion 57 and the concave portion 59 of the receiving seat 51. That is, the support shaft 47 has a ball bearing structure supported by the bearing 49 via the rolling steel balls 61. At the upper opening of the bearing portion 49, a blocking plate 63 protruding so as to reduce the diameter of the opening is fixedly provided. Closing plate 63
Restricts the protrusion of the flange portion 57 from the bearing portion 49. Further, a gap 65 is formed between the closing plate 63 and the flange portion 57. Therefore, the support shaft 47 is provided with the gap 6.
For five, it becomes movable in the vertical direction.

At the upper end of the support shaft 47, a relatively long support rod 67 having one end fixed in the longitudinal direction is provided. Support rod 67
A linear track 69 is formed in the longitudinal direction on the upper surface of. In the straight track 69, the track length L is set to approximately half (about 22 mm) the displacement absorption interval in the seismic isolation part. Straight trajectory 69
Is sandwiched between a pair of left and right side plates 71 that are long in the longitudinal direction of the support rod 67. Further, front and rear regulating plates 73 are provided at both ends in the longitudinal direction of the linear track 69. That is, the linear track 69 formed on the upper surface of the support rod 67 is surrounded by the side plate 71 and the front and rear regulating plate 73. On the upper edges of the side plates 71 and the front and rear regulating plates 73, there are provided upper regulating plates 75 (see FIG. 5) which project horizontally toward the inside of the linear track 69.

The other end of the support rod 67 is rotatable at an angle of 360 ° about the support shaft 47 as the center of rotation. The support rod 67 has a small angle of about 1 to 5 degrees which is non-parallel to the longitudinal straight line M, which is the passenger transport path of the escalator main body 21, and the parallel line N at normal times when no earthquake occurs. The direction on the longitudinal straight line Q having the intersection angle θ is maintained (see FIG. 3).

The track surface 69a of the linear track 69 is
7, that is, an inclined surface that becomes lower toward the support shaft 47. A roller regulating recess 77 is formed at the bottom end of the inclined surface. On the other hand, a hanging shaft 79 is provided on the lower surface of the main frame 29 so as to correspond to each support rod 67.
The hanging shaft 79 is rotatable about a vertical axis.
9 At the lower end of the hanging shaft 79, a horizontal shaft 8 is provided.
A roller unit 83 that can rotate around one turn is provided. As shown in FIG. 5, for example, a pair of roller portions 83 are provided with the hanging shaft 79 interposed therebetween. The roller portion 83 is provided with a linear track 6 of the support rod 67.
9 and rolls on a linear track 69. That is, the main frame 29 is movably supported by the support rod 67 via the roller portion 83 provided on the hanging shaft 79. The pair of side plates 71, the front and rear regulating plates 73, and the upper regulating plate 75 accommodate the roller unit 83 in the linear track 69. As a result, the roller portion 83 is prevented from falling off the linear
7 is engaged. A coil spring 85 is provided on the outer periphery of the shaft core 55. The coil spring 85 has a lower end fixed to the receiving seat 51 and an upper end fixed to the flange portion 57. In this state, the support rods 67 are arranged in a state where they are each oriented in a predetermined direction. Therefore, the support rod 67 rotated in a direction other than the predetermined direction is restored in the predetermined direction again by the spring force of the coil spring 85. The predetermined direction of the support rod 67 is a direction in which the tip of the seismic isolation part 43 of the upper floor 31 is directed to the left side in FIG. 4, and a direction in which the tip of the seismic isolation part 43 of the lower floor 33 is directed to the right side opposite to FIG. (See the state of FIG. 1). A tread plate 87 (see FIGS. 1 and 4) spans between the floor 35 of the upper floor 31 and the main frame 29. The floor 37 of the lower floor 33 and the main frame 29
Also, a similar tread plate 87 is bridged between them (see FIG. 1).
Thereby, the step 4 between the floors 35 and 37 and the main frame 29 is formed.
5 is closed. The tread plate 87 has at least the floor portions 35 and 37.
Alternatively, it is slidable relative to the main frame 29.

Next, the operation of the seismic isolation escalator 91 configured as described above will be described. FIG. 6 is an explanatory view showing patterns of displacement directions of upper and lower floors, FIG. 7 is an explanatory view showing upper and lower floor seismic isolation units in a normal state, and FIG. FIG. 9 is an explanatory view showing the state of the seismic isolation unit when it moves to the left (arrow A) in the figure, and FIG. 9 shows the state of the seismic isolation unit when the upper floor and the lower floor move to the right (arrow B) in the figure. It is explanatory drawing which shows a state.

As shown in FIGS. 7A and 7B, at normal times, the seismic isolation section 43 of the upper floor 31 is configured such that the tip end of the support rod 67 has the above-mentioned intersection angle θ by the coil spring 85 shown in FIG. Turn to the left while holding it. In addition, the seismic isolation unit 43 of the lower floor 33 faces rightward with the tip kept at the intersection angle θ by the coil spring 85. As a result, the respective roller portions 83 are arranged on the center of the support shaft 47 due to the inclination of the raceway surface 69a. On the other hand, when the upper floor 31 and the lower floor 33 move in the directions of the arrows a and c shown in FIG.
37 and the main frame 29 are displaced relative to each other. This displacement is caused by the upper floor 31 and one end of the main frame 29, and the lower floor 33
And the other end of the main frame 29. That is, FIG.
As shown in (A), between the upper floor 31 and the main frame 29,
The support rod 67 is rotated to the right stably by the effect of the cross angle θ, and the roller portion 83 is moved toward the front end (right end direction) of the support rod 67.
, And this positional displacement is absorbed. In this case, the effect of the intersection angle θ is, as shown in FIG.
At the moment when 7 moves in the direction of the arrow on the upper floor 31, the reaction force in the direction of the arrow AA opposite to the direction of the arrow A acts on the support rod 67 (in the linear track 69) of the seismic isolation unit 43. The force stably rotates (rolls) in the direction of arrow AAA, and FIG.
(A). This is the lower floor 33
The same applies to. Further, between the lower floor 33 and the main frame 29, as shown in FIG. 8 (B), the roller portion 83 moves the crossing angle θ toward the tip end (right end direction) of the support rod 67 on the parallel line N. It rolls back and this position displacement is absorbed. Also, when the upper floor 31 and the lower floor 33 move in the directions of the arrows b and d shown in FIG. 6, as shown in FIG.
Between the main frame 29 and the main frame 29, the roller portion 83 rolls toward the tip end direction (left end direction) of the support rod 67 by returning the intersection angle θ on the parallel line N, and the positional displacement is absorbed. In addition, between the lower floor 33 and the main frame 29, as shown in FIG. 9 (B), the support rod 67 is stably rotated leftward by the effect of the intersection angle θ.
The roller portion 83 rolls toward the tip end (left end direction) of the support rod 67, and the positional displacement is absorbed. Further, when the upper floor 31 and the lower floor 33 move in the arrow b and arrow c directions shown in FIG. 6, between the upper floor 31 and the main frame 29, as shown in FIG. The support rod 67 rolls by returning the intersection angle θ on the parallel line N toward the tip end direction (left end direction) of the support rod 67, and the positional displacement is absorbed. Further, between the lower floor 33 and the main frame 29, as shown in FIG. 8 (B), the roller portion 83 moves the crossing angle θ toward the tip end (right end direction) of the support rod 67 on the parallel line N. It rolls back and the position displacement is absorbed. When the upper floor 31 and the lower floor 33 move in the directions of the arrows a and d shown in FIG. 6 (arrow A), between the upper floor 31 and the main frame 29,
As shown in FIG. 8A, the support rod 67 rotates rightward with the effect of the crossing angle θ, the roller portion 83 rolls toward the tip end (right end direction) of the support rod 67, and the position displacement occurs. Is absorbed. 9 between the lower frame 33 and the main frame 29.
As shown in (B), the support rod 67 rotates leftward with the effect of the cross angle θ, and the roller portion 83 rolls toward the tip end (left end direction) of the support rod 67, and the positional displacement is absorbed. Is done.

As described above, the seismic isolation escalator 9 described above is used.
Reference numeral 1 denotes two floors, one at the other end and the other at the other end, of the upper frame 31 and the floor portions 35, 3
7 supported. And the seismic isolation part 43 includes the floor parts 35, 3
7 has a support shaft 47 and a linear track 69 rotatably provided around a vertical axis.
And a roller section 83 provided on the main frame 29 and rotating on a linear track 69. Therefore, each support portion of the main frame 29 can be freely supported by the rotation of the support rod 67 and the movement of the roller portion 83. The movement range is an arbitrary position within a circle centered on the support shaft 47 and having the radius of the support rod 67. However, by providing the intersection angle θ, rotation within a substantially semicircle is sufficient. Thus, the displacement absorption interval C in the width direction can be reduced. As a result, the upper floor 31 and the lower floor 3 where there is a possibility that a large displacement may occur in the relative position by sandwiching the seismic isolation part 43.
3, the escalator main body 21 can be erected without allowing the relative frame displacement to be absorbed and without dropping the main frame 29. In addition, since the raceway surface 69a on which the roller portion 83 rolls is an inclined surface that becomes lower toward one end of the support rod 67, even when the roller portion 83 moves, the roller portion 83 moves the raceway surface 69a by gravity. Can be restored to one end. Thereby, the escalator main body 21 can always be arranged at a predetermined position in a normal state. Further, since the support shaft 47 is provided so as to be movable in the vertical direction and the roller portion 83 is engaged so as not to fall off from the support rod 67, a vertical positional displacement occurs between the upper floor 31 and the lower floor 33. In this case, the support shaft 47 can be moved in the vertical direction to support the main frame 29 without falling off.

The seismic isolation escalator 9 according to the present invention
1 has been described with a configuration in which each of the two ends of the main frame 29 at one end and the other end is supported by the seismic isolation part 43. However, if the function of seismic isolation can be exerted, it is not necessarily limited to the support at two locations. There is no. Further, the arrangement of the above-described coil spring 85 can be freely selected by structural arrangement, and if the support rod 67 rotated for seismic isolation is to be restored manually, the coil spring 85 can be omitted. It is.

[0016]

As described above, according to the present invention,
At least one end and the other end of the main frame of the escalator are supported on upper and lower floors via seismic isolation parts, and the seismic isolation parts are connected to a rotatable support shaft and a linear track provided on the floor part. Since one end in the longitudinal direction is fixed to the support shaft, and the support rod having an intersection angle and the roller portion provided on the main frame and rolling on a linear track, the main frame is rotated by the support rod. The main frame does not fall off the floor because the main frame does not fall off the floor, so the escalator body is installed even between the upper and lower floors sandwiching the seismic isolation layer. It is possible to achieve stable seismic isolation.

[Brief description of the drawings]

FIG. 1 is a side view of a seismic isolation escalator according to an embodiment of the present invention.

FIG. 2 is an external front view of the seismic isolation escalator of FIG.

FIG. 3 is a plan view of a main part of an end of a main frame.

FIG. 4 is an enlarged sectional view taken along line XX of FIG. 3;

5 is a sectional view taken along the line YY of FIG. 4;

FIG. 6 is an explanatory diagram showing patterns of displacement directions on the upper floor and the lower floor.

FIG. 7 is an explanatory view showing the seismic isolation units on the upper floor and the lower floor in a normal state.

FIG. 8 is an explanatory diagram showing the state of the seismic isolation unit when the upper floor and the lower floor move leftward in the figure.

FIG. 9 is an explanatory diagram showing the state of the seismic isolation unit when the upper floor and the lower floor move rightward in the figure.

FIG. 10 is a side view of a conventional escalator.

FIG. 11 is a plan view of a main part of a conventional main frame support.

[Explanation of symbols]

21 escalator body, 23 circulation circuit, 29 main frame, 31 upper floor, 33 lower floor, 35, 37 floor, 43
... seismic isolation part, 47 ... support shaft, 67 ... support rod, 69 ... linear track, 69a ... track surface, 83 ... roller part, 91 ... seismic isolation escalator, θ ... cross angle, M, Q ... longitudinal straight line, N …
parallel lines

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takeshi Iwama 4-6, Kanda Surugadai, Chiyoda-ku, Tokyo Within the elevator group of Hitachi, Ltd. (72) Inventor Kazuhei Kojima 1070 Mo, Hitachinaka-shi, Ibaraki Hitachi, Ltd. Within the elevator group (72) Inventor Naoshi Shimura ▲ Aki ▼ 1-2-7 Moto-Akasaka, Minato-ku, Tokyo Kashima Construction Co., Ltd. (72) Koji Takahashi 1-2-Chome Moto-Akasaka, Minato-ku, Tokyo No. 7 Inside Kashima Construction Co., Ltd. (72) Inventor Hiroki Kuchino 1-2-7 Moto Akasaka, Minato-ku, Tokyo (72) Inside Kashima Construction Co., Ltd. (72) Inventor Hiroshi Fujimura 1-2-2 Moto-Akasaka, Minato-ku, Tokyo No. 7 Kashima Construction Co., Ltd. F-term (reference) 3F321 AA04 AA08 CD20 GA37

Claims (1)

[Claims] An endless circulating path, a driving mechanism for operating the circulating path, and a main frame for supporting and fixing at least the circulating path and the driving mechanism, one end of the main frame being inclined in a longitudinal direction. On the upper floor and the other end on the lower floor, while at least one end and the other end of the main frame are interposed via a seismic isolation part in an escalator that constitutes a straight passenger transportation path in the longitudinal direction of the main frame. Supported on the floors of the upper floor and the lower floor, and the seismic isolation unit is orthogonal to the support shaft, and a support shaft is provided on the floor so as to be rotatable around a vertical axis. A linear track having one end fixed to the upper end of the support shaft, a roller provided on the main frame and rolling on the linear track, and a support rod for guiding the roller portion in the longitudinal direction of the linear track. The longitudinal direction of the straight track with respect to the longitudinal axis of the escalator main frame A seismic isolation escalator characterized by crossing the direction axes at a predetermined angle.