JP3062996B2 - Power transmission device for traveling trolley - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a power transmission device capable of driving a plurality of driven means of a traveling vehicle with one power source.

[0002]

2. Description of the Related Art Conventionally, there are provided a plurality of driven means and an independent power source for each driven means .
The traveling cart of the mechanical parking device will be described below.

As shown in FIGS. 3 to 5, a mechanical parking device is often installed in an underground portion of a building 1 such as an office building, a store, a warehouse, or the like. Further, the entire parking device is divided into a plurality of units such as units 2 and 3 arranged side by side,
And it is formed by combining these units. Inside each of the units 2 and 3, running paths 4 and 5, which are parallel to each other, a running carriage 6, a running rail 7 laid on each running path 4 and 5, and tandemly arranged on both left and right sides of the running path. It has a plurality of parking rooms 8. Each parking room 8 is defined by a multi-stage (for example, two-stage) parking shelf 9 (see FIG. 5).

On the other hand, an entrance / exit passage 11 is set in the first floor of the building 1 and the like, and an entrance room 12 and an exit room 13 are provided on the way. Further, an elevating device 14 is provided as a communication means between the entry room 12 and the exit room 13 and the unit 3. In addition, traveling cart 6, parking room 8, storage room 12, storage room 13
The elevator 14 is provided with a conveyor in a direction orthogonal to the traveling paths 4 and 5, respectively. In addition, the lifting device 14
A transfer conveyor chamber 51 is provided in a portion adjacent to the elevating device 14 in order to transfer a vehicle between the unit 2 having no unit and the unit 3. For convenience of explanation, reference numeral 15 is assigned to the conveyor of the traveling carriage 6, and reference numeral 16 is assigned to the conveyor of the parking room 8 (see FIG. 6). Vehicles are freely delivered and received by these conveyors 15 and 16, and the vehicle 10 enters and leaves a predetermined parking room. The applicant has already disclosed the details of the mechanical parking device having the above-described configuration in Japanese Patent Application Laid-Open No. 7-238708 and the like, and the details of the traveling carriage with lift have been already disclosed in Japanese Patent Application Laid-Open No. 7-238705. . In addition, the applicant has
Japanese Patent Application Laid-Open No. H8-100540 discloses a mechanical parking device in which the parking room 8 and the conveyor 16 have a width capable of simultaneously mounting a plurality of vehicles (so-called double-row parking is possible).

[0005] The conveyor 16 in the parking room 8 receives a driving force from a power source provided on the traveling carriage 6 by the following power transmission device. The power transmission means enables the conveyor 15 of the traveling vehicle 6 and the conveyor 16 of the parking room 8 to operate synchronously. Hereinafter, the power transmission device will be described with reference to FIG.

The main frame 17 of the traveling vehicle 6 is provided with a front conveyor 15a and a rear conveyor 15b. The main frame 17 is provided with a movable frame 18 that moves in a direction orthogonal to the traveling path 4. Further, a power transmission roller 19 is rotatably provided on a side portion of the movable frame 18 facing the parking room 8. The power sources of the power transmission roller 19 and the conveyor 15 of the traveling vehicle 6 are both the drive motor 20 of the traveling vehicle 6. In addition, the movable frame 18 is attached to the main frame 17 in a direction orthogonal to the traveling path 4,
That is, the driving unit 21 for moving the vehicle in the direction approaching the parking room 8 is provided. In addition, the conveyor 16 provided inside the parking room 8 also has a front conveyor 16a like the traveling carriage 6.
And a rear conveyor 16b. A driven roller 22 for transmitting power to the front and rear conveyors 16a and 16b is provided on the traveling path 4 side of the parking room 8.

When the vehicle 10 enters the warehouse, the traveling vehicle 6 on which the vehicle is mounted moves on the traveling rail 7 with wheels 24 driven by a traveling motor 23 and stops at the target parking room 8. . Then, the movable frame 18 is moved in the direction of the target parking room 8 by the driving means 21. By this operation,
A power transmission roller 19 provided at a side end of the movable frame 18 is
It comes into pressure contact with the driven roller 22 of the parking room 8. Next, the drive motor
By operating 20, the conveyor 15 of the traveling vehicle 6 and the power transmission roller 19 are rotated. The power transmission roller 19 drives the driven roller 22, and the rotation of the driven roller 22 is transmitted to the conveyor 16 of the parking room 8 by the transmission member 25. Therefore, the conveyors 15 and 16 rotate synchronously, and the vehicle on the traveling trolley 6 is carried into the target parking room. Thus, the traveling vehicle 6
The conveyor 15 and the conveyor 16 of the parking room 8 are synchronized by a synchronization means having a power transmission roller 19 and a driven roller 22.
It can be rotated synchronously using the drive motor 20 of the traveling vehicle 6 as a power source.

[0008]

However, the mechanical parking device having the above configuration has the following problems. The traveling carriage 6 includes a plurality of power sources such as a driving motor 20 for the conveyor which is a power source of the conveyor 15 and the conveyor 16, a driving means 21 which is a power source of the movable frame 18, and a traveling motor 23 for driving the traveling wheels 24. Source. These power sources are heavy in weight, which is an obstacle in reducing the weight of the traveling vehicle 6. If the weight of the traveling vehicle 6 is large, it is necessary to give the structure of the mechanical parking device a strength enough to withstand it, and the weight increases due to reinforcing members and the like, and the weight increase of the entire device is considerable. It will be. Therefore, it has long been desired to reduce the weight of the traveling vehicle 6 by arranging these power sources and reduce the number of control devices therefor.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has as its object to integrate the power sources of a plurality of driven means of a traveling vehicle into one to simplify and reduce the weight of the entire apparatus. The goal is to mitigate this.

[0010]

According to a first aspect of the present invention, there is provided a power transmission device for a traveling vehicle, wherein a plurality of parking rooms are arranged along a traveling path of the traveling vehicle. In each of the truck and the parking room, a conveyor for transferring the vehicle in a direction orthogonal to the traveling path is provided so as to be mutually connectable,
Further, in the mechanical parking device, wherein the traveling vehicle is provided with means for synchronizing the conveyor of the traveling vehicle and the conveyor of the parking room, the traveling vehicle has an electric motor as a power source.
The input from the rotating shaft of the motor is reduced at an arbitrary distribution ratio.
Distributing means distributable to at least two output shafts;
Braking means capable of independently braking each of the output shafts of the means.
A power switching device provided, wherein one of the output shafts of the distribution means is connected to a drive system of traveling wheels of a traveling vehicle, and the other is connected to a drive system of the conveyor. .

According to the present invention, the driving force obtained from the rotating shaft of the electric motor is distributed to the two output shafts by the distribution means, and braking is performed by applying braking to an arbitrary output shaft by the braking means. Only the output shaft which does not rotate rotates, and transmits power only to the driven means connected to the output shaft. And one of the output shafts of the distributing means is connected to a traveling platform.
The other one is connected to the drive system of the car
By connecting each to the dynamic system, the running wheels and the front
The conveyor is driven by the one electric motor.

Further, according to a second aspect of the present invention, there is provided
According to the power transmission device, the power switching exchange apparatus, the distribution
A differential gear as a means,
As a step, the two output shafts of the differential gear
It is provided with a brake provided for each. And one
Activate the other brake to fix the rotation of one output shaft
Release the other brake and rotate the motor
Thus, only the other output shaft is rotationally driven.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings. Here, the same or corresponding parts as in the conventional example are denoted by the same reference numerals, and detailed description thereof will be omitted.

FIG. 1 is a plan view of a traveling cart of a mechanical parking device according to an embodiment of the present invention. Also,
FIG. 2 shows a main part of the traveling vehicle in an enlarged manner. The traveling vehicle 6 according to the embodiment of the present invention includes a motor 26 as a common power source of a “driving system of traveling wheels” and a “driving system of a conveyor” to be described later. The rotating shaft of the motor 26 is connected to, for example, a differential gear as a distributing means capable of distributing an input from the rotating shaft at an arbitrary distribution ratio to at least two output shafts. When a differential gear is used, it is possible to distribute power without using a clutch or the like to connect and release the drive system, thereby increasing reliability and durability. Further, since a clutch is not required, a power supply for the clutch, a control circuit, and the like are not required. Then, one of the two output shafts of the differential gear (hereinafter, referred to as “first output shaft”) is connected to the drive system of the traveling wheels 24 as described later. Further, the other output shaft 29 (hereinafter, referred to as “second output shaft”) is connected to a drive system of the conveyor as described later.

The first output shaft 28 has a first brake 30
The second output shaft 29 is provided with a second brake 31. The first brake 30 and the second brake 31 can be independently controlled by control means (not shown) such as a control device of a mechanical parking device. Therefore, the first output shaft 28,
The rotation of the second output shaft 29 can be independently limited.

The first output shaft 28 transmits power to an axle shaft 33 via a speed reducer 32 using a worm gear, a bevel gear, and the like, and a wheel 24 attached to the axle shaft 33.
Drive. (The above is the reduction gear 32, axle shaft 33
Constitute the “drive system of the traveling vehicle”. A drive sprocket 34 is mounted on the second output shaft 29. Then, the chain 37 is wound around the driving sprocket 34 and the driven sprockets 35 and 36 to transmit the driving force of the motor 26 to the power transmission roller 19 of the movable frame 18 and the driving shaft 38. (Thus, the sprockets 34, 35, and 36, the chain 37, and the drive shaft 38 constitute a "drive system of the conveyor.") The drive shaft 38 extends in the longitudinal direction of the traveling vehicle 6 as shown in FIG. Power is transmitted to both the rear conveyor 15a and the rear conveyor 15b.

The power transmission device for a traveling vehicle according to the embodiment of the present invention has the above configuration. As described previously, the driving force of the motor 26, differential gear 27
Is distributed to the first output shaft 28 and the second output shaft 29. In this configuration, the first brake 30 is operated to fix the rotation of the first output shaft 28, and the second brake 31 is released to release the motor.
When the vehicle 26 is rotated, the motor 26 rotates only the second output shaft 29 while the traveling vehicle 6 is stopped. Therefore, the front conveyor 15a, the rear conveyor 15b, and the power transmission roller 19 are driven, and the delivery operation of the vehicle 10 (FIG. 3) can be performed. Also, the second output shaft 29 is operated by operating the second brake 31.
When the first brake 30 is released and the motor 26 is rotated, the motor 26 rotates only the first output shaft 28 with the front conveyor 15a, the rear conveyor 15b, and the power transmission roller 19 stopped. Drive. Therefore, the driving force of the motor 26 is transmitted to the wheels 24, and the traveling vehicle 6 can travel. As described above, the differential gear 27 and the first,
With the second brakes 30 and 31, a first output shaft 28 and a second output shaft
It constitutes a power switching device for 29.

If the rotation speed required for the drive system of the traveling wheels is different from the rotation speed required for the drive system of the conveyor, the reduction ratio of the speed reducer 32 and the drive sprocket
By adjusting the reduction ratio of the driven sprockets 35, 36 with respect to 34, the respective desired rotational speeds are obtained. Also, the first
When the output shaft 28 is driven (that is, when the traveling vehicle 6 is traveling)
When the second output shaft 29 is driven (ie, when the vehicle 10 is being delivered), the driving torque required for the motor 26 is naturally different. Therefore, the output shaft to be driven (the first output shaft)
28 or the second output shaft 29), the torque of the motor 26 is controlled by the inverter, thereby reducing the weight and increasing the output of the motor and improving the operation efficiency.

The operation and effect obtained by the embodiment of the present invention having the above configuration are as follows. The driving force of the motor 26 of the traveling vehicle 6 is distributed by the differential gear 27 to one of the first output shaft 28 and the second output shaft 29, and the driving system of the traveling wheels 24 is transmitted by the first output shaft 28 to the second output shaft. 29 drives the conveyor drive systems respectively. By the way, the conveyor 15 is not operated while the traveling vehicle 6 is traveling, and conversely, the traveling vehicle 6 is not activated while the conveyor 15 is operating. That is, the driving system of the traveling trolley and the driving system of the conveyor are not driven at the same time.
A power switching device composed of a gear 27, a first brake 30, and a second brake 31, connects two drive systems to one motor.
It becomes possible to drive with 26. Therefore, the number of motors that cause an increase in the weight of the traveling vehicle 6 can be arranged, and the weight of the traveling vehicle 6 can be reduced. As a result, the load on the structure of the mechanical parking device can be reduced, and the required strength can be reduced, so that the overall size and weight of the parking device can be reduced.

Further, the motor 26 has an output enough to allow the traveling carriage 6 to travel. Therefore, the parking room 8 (FIGS. 3 to 6)
Conveyor 16) can be changed from a roller conveyor to a slat conveyor (disclosed by the present applicant in Japanese Patent Application Laid-Open No. 7-238710). Even if the driving force required for the power transmission roller 19 increases by changing to the type in which line parking is possible, the motor 26 can sufficiently cope with the case.

[0021]

According to the present invention, the following effects are obtained. First, according to claim 1 of the present invention
According to the power transmission device of the traveling vehicle, the driving force obtained from the rotating shaft of the electric motor is distributed to the two output shafts by the distribution means, and braking is performed by applying braking to any output shaft by the braking means. Only the output shaft that is not rotating rotates, and power can be transmitted only to the driven means connected to the output shaft that is not braked. Therefore, traveling
The power source for the wheels and the conveyor is integrated into one motor,
Simplify the overall power transmission system of the truck and reduce the weight
It becomes possible to plan. As a result, conventional running wheels and cores
Compared to a traveling vehicle that has separate drive means for
It is possible to reduce the weight of the mold, and
It is possible to promote the reduction in size and weight of the body.

Further, according to the second aspect of the present invention ,
According to the power transmission device, the differential gear
Only one of the two output shafts can be driven.
The drive system of the traveling wheel, which is not
By driving the drive system of the conveyor with one motor,
The traveling vehicle can be simplified and the weight can be reduced.

[Brief description of the drawings]

FIG. 1 is a plan view showing a traveling cart of a mechanical parking device according to an embodiment of the present invention.

FIG. 2 is an enlarged view of a main part of the traveling vehicle shown in FIG.

FIG. 3 is a schematic diagram illustrating an example of a mechanical parking device.

FIG. 4 is a longitudinal sectional view taken along line AA of FIG. 3;

FIG. 5 is a longitudinal sectional view taken along line BB of FIG. 3;

6 is a schematic diagram showing the structure of a traveling vehicle used in the mechanical parking device shown in FIG.

[Explanation of symbols]

 6 Traveling Cart 15 Conveyor 15a Front Conveyor 15b Rear Conveyor 19 Power Transmission Roller 24 Running Wheel 26 Motor 27 Differential Gear 28 First Output Shaft 29 Second Output Shaft 30 First Brake 31 Second Brake 38 Drive Shaft

Claims (2)

(57) [Claims] A plurality of parking rooms are arranged along a traveling path of a traveling vehicle, and a conveyor for transferring a vehicle in a direction orthogonal to the traveling path can be connected to each of the traveling vehicle and the parking room. A mechanical parking device provided with, and a means for synchronizing the traveling vehicle with the conveyor of the traveling vehicle and the conveyor of the parking room, wherein the traveling vehicle has a power source
Motor, and input from the rotating shaft of the motor is optional.
That can be distributed to at least two output shafts with a distribution ratio of
Means and the output shaft of the distribution means can be independently braked
And a power switching device provided with an appropriate braking means , wherein one of the output shafts of the distribution means is connected to the drive system of the traveling wheels of the traveling vehicle, and the other is connected to the drive system of the conveyor. A power transmission device for a traveling vehicle. 2. The power switching device according to claim 1 , wherein
And a differential gear as the braking means.
Each of the two output shafts of the differential gear
2. The method according to claim 1, further comprising a gear brake.
Power transmission device for traveling trolley.