JP2000302364A - Drive device for passenger conveyor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drive device of a passenger conveyor which can reduce the longitudinal dimension of a main frame, reduce the weight and facilitate the execution by preventing a rear wheel of a step from being interfered with a drive shaft. SOLUTION: This drive device of a passenger conveyor comprises a motor to output the drive power of steps 7a, 7b from a prime mover shaft, short drive shafts 21a, 21b to which a step sprocket 5 is pivotably attached respectively, and which are supported from right and left sides of a main frame 1 in a cantilever manner, bearings 20a, 20b which are provided on right and left sides of the main frame 1 and support the short drive shafts 21a, 21b in a concentric and cantilever manner so as not to be interfered with a rear wheel 15 of the steps 7a, 7b, and a transmission which is connected to the prime mover shaft of the motor, reduces the rotation, and transmits it to the short drive shafts 21a, 21b.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a driving apparatus for a passenger conveyor, and more particularly to a driving apparatus for a passenger conveyor in which a driving shaft that interferes with a rear wheel of a step is eliminated.

[0002]

2. Description of the Related Art FIG. 15 shows the upper floor of a conventional passenger conveyor [escalator], and FIG.
17 is a plan view seen from H in FIG. Reference numeral 1 denotes a main frame of a truss structure, and balustrades 2 are provided on both left and right sides along the upper side of the main frame 1. On the upper floor of the main frame 2, left and right step sprockets 5, 5 are mounted on a drive shaft 4, both ends of which are supported by bearings 3. The step chains 6, 6 are wound endlessly around the step sprocket similarly provided on the floor side.
The steps 7a, ..., 7b, ... are connected to the step chain 6 via the step shaft 8 so as to form a continuous endless shape.

In FIG. 16 and FIG.
Indicates the entire driving device. The power of the electric motor 10 is
1 small sprocket 12 attached to the output shaft
Is transmitted to the drive shaft 4 by the drive chain 18 wound around the large sprocket 13 attached to one end of the drive shaft 4. By the rotation of the drive shaft 4, the step sprockets 5, 5 are rotated, and the steps 7 a, 7 b,... Move together with the step chain 6.

Each of the steps 7a and 7b has a front wheel 14 and a rear wheel 1
5 are provided, and the steps 7a, 7b are moved by rear wheel guide rails 16a, 16b on which the rear wheel 15 rolls;
Front wheel guide rails 17a, 17b on which the front wheel 14 rolls
Guided by In this case, the guide rail 1 for the rear wheel
6a and steps 7a moving along the front wheel guide rail 17a are steps on the outward path side, and the rear wheel guide rail 16b.
And step 7b moving along front wheel guide rail 17b
… Is the step on the return side.

[0005]

When installing an escalator in a building, it is necessary to go through the stairs and construct the main frame 1. In this construction, the vertical dimension H of the truss constituting the main frame 1 is greatly related to the construction period and the construction cost. As the length H of the main frame 1 in the vertical direction is smaller, the weight can be reduced and the installation of the escalator is easier.

However, in order to reduce the length H of the main frame 1 in the longitudinal direction, the rear wheel guide rails 16a, 16b and the like for guiding the traveling of the steps after securing the step traveling space for the forward path and the returning path. Front wheel guide rails 17a, 17b
In addition to the structural restrictions such as the provision of
If the is reduced, the rear wheels of the steps will interfere with the drive shaft,
The distance between the rear wheel of the forward step and the rear wheel of the return step cannot be made smaller than the diameter of the drive shaft, and there is a limit.

SUMMARY OF THE INVENTION It is an object of the present invention to reduce the vertical dimension of the main frame by solving the problems of the prior art and preventing the rear wheels of the steps from interfering with the drive shaft. It is an object of the present invention to provide a passenger conveyor driving device which can reduce weight and contribute to simplification of construction.

[0008]

In order to achieve the above object, according to the first aspect of the present invention, a plurality of steps having a front wheel and a rear wheel rolling a guide rail are endlessly connected to a step sprocket via a chain. In the driving device of the passenger conveyor wound in a shape, an electric motor that outputs the driving power of the steps from the driving shaft, and the short sprockets on which the step sprockets are respectively mounted and cantilevered from the left and right sides of the main frame, respectively. A bearing provided on each of the left and right sides of the main frame and supporting the respective short drive shafts coaxially and cantileverly so as not to interfere with the rear wheel of the step, and a driving shaft of the electric motor, And a transmission for decelerating the transmission to each of the short drive shafts.

According to the first aspect of the present invention, a short drive shaft having a short length is cantilevered from both the left and right sides of the main frame, and the shaft connecting the left and right step sprockets is eliminated. The rear wheel of the step that turns back from the outward path to the return path does not interfere with the short drive shaft, so the diameter of the step sprocket is reduced as much as possible, and the length of the main frame in the vertical direction is reduced. Can be reduced as much as possible.

[0010] As described in claim 2, the short drive shaft is preferably cantilevered so that the distance between the shaft end faces is longer than the wheel interval between the rear wheels of the step. An electric motor having a driving shaft connected to an input shaft of the transmission device on one side is applied to the electric motor.

According to a fourth aspect of the present invention, in the transmission, the output shaft for reducing the rotation of the input shaft and outputting the output shaft extends to the left and right sides; And a winding transmission mechanism that indirectly transmits to the short drive shaft.

Alternatively, as set forth in claim 5, the transmission device comprises: a speed reducer having output shafts extending to the left and right sides for outputting the rotation of the input shaft by reducing the rotation of the input shaft; A gear transmission mechanism that transmits power directly to the short drive shaft.

According to a sixth aspect of the present invention, the transmission includes a speed reducer having an output shaft extending to one side for outputting the rotation of the input shaft by reducing the rotation of the input shaft; An intermediate shaft distributed to the drive shaft, the output shaft, the intermediate shaft,
A gear transmission mechanism for directly transmitting rotation between the short drive shafts.

[0014] In place of the motor described in claim 3, as described in claim 7, the motor employs a motor having driving shafts on both sides connected to an input shaft of the transmission. Is also good. In that case, as described in claim 8, the electric motor can be constituted by a pair of electric motors having a driving shaft connected to an input shaft of the transmission on one side.

According to a ninth aspect of the present invention, in the transmission, each of the input shafts is connected to each of the driving shafts, and the rotation of the input shaft is reduced to output from each of the output shafts. And a winding transmission mechanism for indirectly transmitting the rotation of each of the output shafts to each of the short drive shafts.

[0016] In place of the wrapping transmission mechanism of claim 9, as described in claim 10, a gear transmission mechanism for directly transmitting rotation of the output shaft to each of the short drive shafts may be used. .

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a passenger conveyor driving device according to the present invention will be described below with reference to the accompanying drawings. First Embodiment FIG. 1 is a diagram showing an upper floor of a passenger conveyor according to a first embodiment of the present invention. In FIG. 1, the steps themselves are the same as in FIG. 15, and the same reference numerals are given to the same components as those in FIG. 15, and detailed description thereof will be omitted. The step chain 6 includes a step sprocket 5 provided on the upper floor side.
Are wound endlessly on a step sprocket similarly provided on the lower floor side (not shown). Step 7a,
.., 7b,...
Through the step chain 6. Step 7a
Is a forward step, and step 7b is a return step.
Each step 7a, 7b has a front wheel 14 and a rear wheel 15.

FIG. 2 is a sectional view taken along the line II-II in FIG. Bearings 20a, 20b are attached to the left and right trusses 1a, 1b in the main frame 1, and the short drive shafts 21a, 21b are coaxially and rotatably cantilevered by the bearings 20a, 20b, respectively. Stepped sprockets 5, 5 are mounted on the short drive shafts 21a, 21b, respectively. In the space defined by the step sprockets 5, 5, the forward step 7a and the return step 7
The respective rear wheels 15 of b are arranged to approach each other. A indicates the interval between the left and right rear wheels 15,15. Unlike the conventional single long drive shaft, the short drive shafts 21a and 21b are short shafts,
The distance between the shaft end surfaces of 1a and 21b can be set to be larger than the wheel interval A.

Next, FIG. 3 is a plan view seen in the direction of arrow B in FIG. In FIG. 3, reference numeral 22 denotes a step 7
a,..., 7b,... 2
3 is a speed reducer. In this embodiment, the electric motor 22 is of a type having a driving shaft 24 on one side.
Is connected to an input shaft (not shown) of the speed reducer. 25
Is an output shaft of the speed reducer 23, and the output shaft 25 extends toward both left and right sides.

In this embodiment, the output shaft 2 of the speed reducer 23
As a mechanism for transmitting the output rotation of No. 5 to the short drive shafts 21a and 21b, a winding transmission mechanism using drive chains 26a and 26b is employed. Drive-side small sprockets 27a, 27b are attached to the left and right shaft ends of the output shaft 25, respectively. On the other hand, large sprockets 28a, 28b on the driven side are attached to the short drive shafts 21a, 21b, respectively. The drive chains 26a, 26b are composed of small sprockets 27a, 27b and large sprockets 28a, 28b.
Is wrapped around. Therefore, the rotation of the electric motor 22 is reduced by the speed reducer 23 and then transmitted from the output shaft 25 to the left and right short drive shafts 21a and 21b to rotate the step sprockets 5 and 5 to drive the steps 7a and 7b. .

As shown in FIG. 2, the short drive shaft 2 having a short length
Steps 7a, 7b that are folded back and forth from the outward path to the return path, because the left and right trusses 1a, 1b of the main frame 1 have a cantilevered structure and the axis connecting the left and right step sprockets 5, 5 is eliminated. Rear wheel 15 is a short drive shaft 2
It does not interfere with 1a and 21b.
For this reason, the diameter of the step sprockets 5, 5 can be reduced as much as possible, and the vertical dimension H of the main frame can be reduced as much as possible.

Next, the step drive device according to the present invention will be described with reference to various variations of a transmission device for transmitting the rotation of an electric motor to a short drive shaft. In these embodiments, the same components as those in the first embodiment are denoted by the same reference numerals, and
The description is omitted.

Second Embodiment FIG. 4 shows a second, third, seventh and seventh embodiment employing a gear transmission mechanism as a mechanism for transmitting the output rotation of the output shaft 25 of the speed reducer 23 to the short drive shafts 21a and 21b. It is a figure showing the escalator upper floor part common to 8 embodiments. FIG.
5 is a plan view as seen in the direction of arrow D. In the second embodiment, similarly to the first embodiment, the electric motor 22 is
4 is provided on one side. The gear transmission mechanism for transmitting the output rotation of the output shaft 25 of the speed reducer 23 to the short drive shafts 21a and 21b is configured as follows.

Drive-side small gears 29a and 29b are attached to the left and right shaft ends of the output shaft 25, respectively. On the other hand, driven short gears 30a, 30b are attached to the short drive shafts 21a, 21b, respectively. Intermediate gear 3
1a and 31b mesh with the small gears 29a and 29b and the large gears 30a and 30b, respectively. Therefore, after the rotation of the electric motor 22 is reduced by the reduction gear 23,
From output shaft 25 to small gears 29a, 29b, intermediate gear 31
a, 31b and the large gears 30a, 30b are transmitted to the left and right short drive shafts 21a, 21b, and the step sprockets 5, 5 rotate to drive the steps 7a, 7b.

According to the second embodiment, like the first embodiment, the rear wheels 15 of the steps 7a, 7b are connected to the short drive shaft 21a,
21b, so that the diameter of the step sprockets 5, 5 can be reduced as much as possible, and the vertical dimension H of the main frame can be reduced as much as possible. Therefore, accurate synchronous transmission to the short drive shafts 21a and 21b becomes possible.

Third Embodiment FIG. 6 is a plan view of a driving device according to a third embodiment as viewed in the direction of arrow D in FIG. Also in the third embodiment, the electric motor 22 has a driving shaft 24 on one side similarly to the first embodiment. The gear transmission for transmitting the output rotation of the speed reducer 23 to the short drive shafts 21a and 21b is configured as follows.

A drive-side small gear 32 is attached to an output shaft extending to one side of the speed reducer 23. On the other hand, the driven gears 30a,
30b is attached. The left and right ends of the intermediate shaft 33 are rotatably supported by bearings 34a and 24b, and left and right intermediate gears 35a and 35b are mounted on the shaft. One of the intermediate gears 35b meshes with the small gear 32 and the large gear 30b, and the other intermediate gear 35a meshes with the large gear 30a. Therefore, the rotation of the electric motor 22 is transmitted to the intermediate shaft 33 via the small gear 32 and the intermediate gear 35b after being reduced by the speed reducer 23, and the intermediate gears 35a, 35b,
Short drive shafts 21 on the left and right sides via the large gears 30a, 30b
a, 21b, the step sprockets 5, 5 rotate and drive the steps 7a, 7b.

According to the third embodiment, similarly to the second embodiment, the rear wheels 15 of the steps 7a, 7b are connected to the short drive shaft 21a,
21b, so that the diameter of the step sprockets 5, 5 can be reduced as much as possible, and the vertical dimension H of the main frame can be reduced as much as possible. Therefore, accurate synchronous transmission to the short drive shafts 21a and 21b becomes possible.

Fourth Embodiment FIG. 7 shows fourth, ninth, and ninth and fourth embodiments in which a gear transmission mechanism without an intermediate gear is used as a mechanism for transmitting the output rotation of the output shaft 25 of the speed reducer 23 to the short drive shafts 21a and 21b. It is a figure showing the escalator upper floor part common to a 10th embodiment.

FIG. 8 is a plan view of the driving device according to the fourth embodiment as viewed in the direction of arrow F in FIG. The speed reducer 23 of this embodiment has an output shaft 25 extending to the left and right sides, and drive-side small gears 36a and 36b are attached to left and right shaft ends of the output shaft 25, respectively. On the other hand, the driven large gears 30a, 30b are attached to the short drive shafts 21a, 21b, respectively, and the small gears 36a, 36b respectively mesh directly with the large gears 30a, 30b. Therefore, the electric motor 22
Is reduced by the speed reducer 23, and then the small gears 36a, 36b and the large gears 30a, 30b are output from the output shaft 25.
Are transmitted to the short drive shafts 21a, 21b on the left and right sides through the shaft, and the step sprockets 5, 5 rotate, and the steps 7a, 7b
Drive.

According to the fourth embodiment, similarly to the second and third embodiments, the rear wheels 15 of the steps 7a and 7b are
1a, 21b, so that the diameter of the step sprockets 5, 5 can be reduced as much as possible, and the vertical dimension H of the main frame can be reduced as much as possible. Is transmitted by meshing of gears, accurate synchronous transmission to the short drive shafts 21a and 21b becomes possible.

The above embodiment is an embodiment in which a motor having a driving shaft extending to one side is adopted. Next, an embodiment in which a motor having a driving shaft on both sides will be described.

Fifth Embodiment FIG. 9 is a plan view of a driving device according to a fifth embodiment as viewed in the direction of arrow B in FIG. Drive shaft 41 of electric motor 40
Reference numerals a and 41b extend to both left and right sides, and are connected to input shafts (not shown) of the speed reducers 42a and 42b disposed on both right and left sides.

In this embodiment, the speed reducers 42a, 42b
As a mechanism for transmitting the output rotation of the drive shaft to the short drive shafts 21a and 21b, a winding transmission mechanism using drive chains 26a and 26b is employed. The drive-side small sprockets 27a, 27b are provided on the left and right output shafts of the speed reducers 42a, 42b, respectively.
Is attached. On the other hand, the short drive shafts 21a, 21b
Are large sprockets 28a, 28b on the driven side, respectively.
Are attached, and drive chains 26a, 26b
Are the small sprockets 27a and 27b and the large sprocket 2
8a and 28b. Therefore, the rotation of the electric motor 40 is reduced by the speed reducers 42a and 42b, respectively, and then transmitted to the short drive shafts 21a and 21b on the left and right sides via the drive chains 26a and 26b, so that the step sprockets 5 and 5 rotate. The steps 7a and 7b are driven.

According to the fifth embodiment, similarly to the first to fourth embodiments, the rear wheels 1 of the steps 7a and 7b are provided.
5 does not interfere with the short drive shafts 21a, 21b, so that the diameter of the step sprockets 5, 5 can be reduced as much as possible, and the vertical dimension H of the main frame can be reduced as much as possible. 6. Sixth Embodiment FIG. 10 is a plan view of a driving device according to a sixth embodiment as viewed in the direction of arrow B in FIG. In this embodiment,
The electric motors 43a and 43b each having a driving shaft extending to one side are combined in a back-to-back manner, and are connected to the input shafts (not shown) of the speed reducers 42a and 42b disposed on the left and right sides.

As in the fifth embodiment, the speed reducers 42a, 4a
As a mechanism for transmitting the output rotation of 2b to the short drive shafts 21a and 21b, a wrapping transmission mechanism using drive chains 26a and 26b is employed. The drive-side small sprockets 27a, 2b are attached to the left and right output shafts of the speed reducers 42a, 42b, respectively.
7b is attached. On the other hand, the short drive shafts 21a, 2a
1b includes large sprockets 28a, 2
8b are attached, and drive chains 26a, 26
b is wound around small sprockets 27a and 27b and large sprockets 28a and 28b. Therefore, the rotation of the electric motor 40 is reduced by the speed reducers 42a and 42b, respectively, and then transmitted to the short drive shafts 21a and 21b on the left and right sides via the drive chains 26a and 26b, so that the step sprockets 5 and 5 rotate. The steps 7a and 7b are driven.

According to the sixth embodiment as well, like the first to fourth embodiments, the rear wheels 1a and 7b of the steps 7a and 7b can be used.
5 does not interfere with the short drive shafts 21a, 21b, so that the diameter of the step sprockets 5, 5 can be reduced as much as possible, and the vertical dimension H of the main frame can be reduced as much as possible. 7th Embodiment FIG. 11 is a plan view of a driving device according to a seventh embodiment as viewed in the direction of arrow D in FIG. In the seventh embodiment, the combination of the electric motor and the speed reducer is the same as that of the fifth embodiment, and the same components as those in FIG. 9 are denoted by the same reference numerals and description thereof is omitted.

The gear transmission mechanism for transmitting the output rotation of the speed reducers 42a and 42b to the short drive shafts 21a and 21b is basically the same as the embodiment of FIG.

The drive side small gears 29a, 29b are attached to the output shafts of the speed reducers 42a, 42b. on the other hand,
Driven side large gears 30a, 30b are attached to the short drive shafts 21a, 21b, respectively. Intermediate gear 31
a and 31b mesh with the small gears 29a and 29b and the large gears 30a and 30b, respectively. Therefore, after the rotation of the electric motor 40 is reduced by the left and right reduction gears 42a and 42b, the small gears 29a and 29b, Intermediate gear 3
The gears are transmitted to the left and right short drive shafts 21a, 21b via the gears 1a, 31b and the large gears 30a, 30b, and the step sprockets 5, 5 rotate to drive the steps 7a, 7b.

According to the seventh embodiment, the rear wheels 15 of the steps 7a and 7b do not interfere with the short drive shafts 21a and 21b as in the first to sixth embodiments. The diameter of the step sprockets 5, 5 can be reduced as much as possible, so that the vertical dimension H of the main frame can be reduced as much as possible. Eighth Embodiment FIG. 12 shows a driving device according to an eighth embodiment. FIG. 5 is a plan view seen in the direction of arrow D in FIG. 4. In the eighth embodiment, the combination of an electric motor and a speed reducer is the same as that of the sixth embodiment in FIG. 10, and the same components as those in FIG. 10 are denoted by the same reference numerals and description thereof is omitted.

The gear transmission mechanism for transmitting the output rotation of the speed reducers 42a and 42b to the short drive shafts 21a and 21b is basically the same as the embodiment of FIG.

In the eighth embodiment, the motors 43a, 4a
3b is reduced by the speed reducers 42a and 42b on both the left and right sides, and then the small gears 29a and 29b and the intermediate gear 3 are rotated.
The gears are transmitted to the left and right short drive shafts 21a, 21b via the gears 1a, 31b and the large gears 30a, 30b, and the step sprockets 5, 5 rotate to drive the steps 7a, 7b.

According to the eighth embodiment constructed as described above, similarly to the first to seventh embodiments, the rear wheels 15 of the steps 7a and 7b do not interfere with the short drive shafts 21a and 21b. , The diameter of the step sprockets 5, 5 can be reduced as much as possible, and the vertical dimension H of the main frame can be reduced as much as possible. Ninth Embodiment FIG. 13 shows a drive device according to a ninth embodiment. FIG. 8 is a plan view seen in the direction of arrow F in FIG. 7. In the ninth embodiment, the combination of the electric motor and the speed reducer is basically the same as that of the fifth embodiment in FIG. 9, and a gear transmission mechanism for transmitting the output rotation of the speed reducers 42a, 42b to the short drive shafts 21a, 21b. Is basically the same as the embodiment of FIG.

In the eighth embodiment, the rotation of the electric motor 40 is reduced by the speed reducers 42a and 42b, and then from the output shafts 25a and 25b via the small gears 36a and 36b and the large gears 30a and 30b. Short drive shaft 21a, 2
1b, the step sprockets 5, 5 rotate to drive the steps 7a, 7b.

According to the ninth embodiment configured as described above, similarly to the first to eighth embodiments, the rear wheels 15 of the steps 7a and 7b do not interfere with the short drive shafts 21a and 21b. It is possible to reduce the diameter of the step sprockets 5, 5 as much as possible and to reduce the vertical dimension H of the main frame as small as possible. Tenth Embodiment FIG. 14 shows a driving device according to a tenth embodiment. FIG. 8 is a plan view seen in the direction of arrow F in FIG. 7. In the tenth embodiment, the combination of the electric motor and the speed reducer is basically the same as that of the eighth embodiment in FIG. 12, and a gear transmission mechanism for transmitting the output rotation of the speed reducers 42a, 42b to the short drive shafts 21a, 21b. Is basically the same as the ninth embodiment in FIG.

In the tenth embodiment, the motor 43a,
The rotation of 43b is reduced by the speed reducers 42a and 42b, and then transmitted from the output shafts 25a and 25b to the small gears 36a and 3b.
6b, the transmission is transmitted to the short drive shafts 21a, 21b on both the left and right sides via the large gears 30a, 30b.
Rotates to drive the steps 7a and 7b.

According to the tenth embodiment configured as described above, similarly to the first to ninth embodiments, the steps 7a, 7b
Since the rear wheels 15 do not interfere with the short drive shafts 21a and 21b, the diameter of the stepped sprockets 5 and 5 should be reduced as much as possible to reduce the vertical dimension H of the main frame as small as possible. Becomes possible.

[0048]

As is apparent from the above description, according to the present invention, the short drive shaft having a short length is cantilevered from both left and right sides of the main frame, and the shaft connecting the left and right step sprockets is eliminated. Therefore, the rear wheel of the step that turns back from the outward path to the return path does not interfere with the short drive shaft, so the diameter of the step sprocket is reduced as much as possible, Can be made as small as possible in the vertical direction.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an upper floor of a passenger conveyor according to a first embodiment of the present invention.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a plan view seen in the direction of arrow B in FIG. 1;

FIG. 4 is an explanatory diagram showing an escalator upper floor common to the second, third, seventh, and eighth embodiments of the present invention.

FIG. 5 is a plan view of the second embodiment as viewed in the direction of arrow D in FIG.

FIG. 6 is a plan view of the third embodiment as viewed in the direction of arrow D in FIG. 4;

FIG. 7 is an explanatory diagram showing an escalator upper floor common to the fourth, ninth, and tenth embodiments of the present invention.

FIG. 8 is a plan view of the fourth embodiment as viewed in the direction of arrow F in FIG. 7;

9 is a plan view of the fifth embodiment as viewed in the direction of arrow F in FIG.

FIG. 10 is a plan view of the sixth embodiment as viewed in the direction of arrow B in FIG. 1;

FIG. 11 is a plan view of the seventh embodiment as viewed in the direction of arrow D in FIG. 4;

FIG. 12 is a plan view of the eighth embodiment as viewed in the direction of arrow D in FIG. 4;

FIG. 13 is a plan view of the ninth embodiment as viewed in the direction of arrow F in FIG. 7;

FIG. 14 is a plan view of the tenth embodiment as viewed in the direction of arrow F in FIG. 7;

FIG. 15 is an explanatory view showing the upper floor of a conventional passenger conveyor.

FIG. 16 is a sectional view taken along the line GG in FIG. 15;

FIG. 17 is a plan view seen from the direction of arrow H in FIG. 15;

[Explanation of symbols]

 Reference Signs List 1 main frame 2 balustrade 5 step sprocket 6 step chain 7 step 8 step shaft 14 front wheel 15 rear wheel 21a, 21b short drive shaft 22 motor 23 reduction gear 24 drive shaft 25 output shaft 26a, 26b drive chain 27a, 27b small sprocket 28a, 28b Large sprocket 29a, 29b Small gear 30a, 30b Large gear

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Megumi Okubo 1 Toshiba-cho, Fuchu-shi, Tokyo F-term in the Fuchu Plant of Toshiba Corporation (reference) 3F321 AA01 AA05 CA02 CA06 CA12 CA19

Claims (10)

[Claims] 1. A passenger conveyor driving device in which a plurality of steps having a front wheel and a rear wheel rolling a guide rail are wound around a step sprocket endlessly via a chain, wherein the driving power of the step is transmitted from a driving shaft. An electric motor to be output; and a short drive shaft on which the step sprocket is pivotally mounted, respectively, and cantilevered from the left and right sides of the main frame; and a short drive shaft provided on each of the left and right sides of the main frame. A bearing that is coaxially supported in a cantilever manner so as not to interfere with the rear wheel, and a transmission device that is connected to the driving shaft of the electric motor, and that reduces the rotation and transmits the rotation to the respective short drive shafts. A driving device for a passenger conveyor. 2. The passenger conveyor according to claim 1, wherein the short drive shaft is cantilevered such that a distance between shaft end faces is longer than a distance between left and right wheels of a rear wheel of the step. Drive. 3. The passenger conveyor driving device according to claim 1, wherein the motor has a driving shaft connected to an input shaft of the transmission device on one side. 4. The transmission, comprising: a speed reducer having output shafts extending to the left and right sides for reducing the rotation of the input shaft and outputting the rotation; and a winding for indirectly transmitting the rotation of the output shaft to each of the short drive shafts. The driving device for a passenger conveyor according to claim 3, comprising a transmission mechanism. 5. The transmission, comprising: a speed reducer having output shafts extending to the left and right sides for outputting the rotation of the input shaft by reducing the rotation thereof; and a gear transmission for directly transmitting the rotation of the output shaft to the respective short drive shafts. The driving device for a passenger conveyor according to claim 3, comprising a mechanism. 6. The transmission, comprising: a speed reducer having an output shaft extending to one side for reducing the rotation of the input shaft and outputting the rotation; an intermediate shaft for distributing the rotation of the output shaft to each of the short drive shafts; The driving apparatus for a passenger conveyor according to claim 3, further comprising: a gear transmission mechanism that directly transmits rotation between the output shaft, the intermediate shaft, and the short drive shaft. 7. The driving apparatus for a passenger conveyor according to claim 1, wherein the electric motor has a driving shaft connected to an input shaft of the transmission device on both sides. 8. The driving apparatus for a passenger conveyor according to claim 7, wherein said motor comprises a pair of electric motors each having a driving shaft connected to an input shaft of said transmission. 9. The transmission, wherein each of the input shafts is connected to each of the driving shafts, and a reduction gear that reduces the rotation of the input shafts and outputs the rotations from the respective output shafts; The driving apparatus for a passenger conveyor according to claim 7, further comprising a winding transmission mechanism that indirectly transmits rotation to each of the short drive shafts. 10. The passenger conveyor according to claim 7, wherein a gear transmission mechanism for directly transmitting the rotation of the output shaft to each of the short drive shafts is used instead of the winding transmission mechanism. Drive.