JPH0741655Y2 - Shift structure of self-propelled trolley - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION This invention relates to a speed change structure for a self-propelled carriage.

[0002]

2. Description of the Related Art Among conventional trucks, there is a self-propelled truck which travels on two parallel rails at a predetermined speed. This self-propelled trolley generally has a simple drive structure that only has a drive motor that rotates wheels. Except for those that the driver rides on and operates, the speed change structure changes the rotation speed of the drive motor. Is not provided on the dolly itself, and simple driving operations such as starting and stopping are performed by electrical control from a distance. In the case of such a driving operation by electric control from a distance, in order to perform control such that the speed of the truck is slowed down in a specific section of the rail and increased in other sections, it is necessary to use the rail beforehand. I had to adopt a large-scale mechanism that sets a sensor etc. and controls the driving device in conjunction with the sensor. The present invention was made in view of such a conventional technique, and requires a large-scale mechanism even for a self-propelled carriage that does not use an individual transmission for the carriage but has wheels that rotate a certain amount. First, the present invention aims to provide a speed change structure of a self-propelled trolley capable of increasing or decreasing the speed in a specific section of a rail.

[0003]

In order to achieve the above object, a speed change structure for a self-propelled carriage according to the present invention has two parallel wheels having a drive wheel and a driven wheel which are constantly rotated by a drive means. In a self-propelled trolley that runs on a continuous rail,
The drive wheel and the driven wheel are formed in a substantially conical shape having a plurality of circumferential surface portions continuously formed through a predetermined step so that the diameter thereof gradually increases inward or outward along the axle. The width of the rail on which the driven wheel rolls is continuously increased or decreased to allow the left and right wheels to select the circumferential surface with the same diameter, and the rail height difference that corresponds to the radius difference of the selected circumferential surface is continuous. By changing the height position of the self-propelled carriage substantially unchanged by increasing or decreasing it, the traveling speed can be changed in a desired rail section.

[0004]

For example, when it is assumed that the diameter of the circumferential surface of the wheel gradually increases toward the outside, the rail comes into contact with the inner circumferential surface of the small diameter in the section where the rail width is reduced. ) The running speed is low. On the contrary, in the section where the rail width is increased, the rail comes into contact with the outer circumferential surface of the larger diameter, so even if the rotation speed is constant, the truck (wheel)
Will increase the running speed. Further, in each section, a rail height difference corresponding to the radius difference of the circumferential surface portion is provided, and during each section, the rail width continuously increases and decreases while the rail height continuously increases and decreases. Even though the rails are continuously laid, the height position of the bogie is substantially unchanged over the entire section of the rail, and it is possible to easily move to the circumferential surface portion of each diameter due to the traveling inertia of the bogie. In this way, even if the wheel rotation speed is constant,
It is possible to change the speed of the trolley in a desired section even on continuously laid rails. Therefore, a large-scale mechanism for controlling the speed of the carriage is not required.

[0005]

1 to 3 are views showing an embodiment of the present invention. In the figure, of the front wheels and the rear wheels provided in the lower part of the bogie, a rear wheel (wheel) 1 that is rotationally driven at a constant rotation speed is shown and described as a representative. Reference numeral 2 denotes a drive shaft, which is rotated by a drive motor (drive means) 3 at a constant speed. The rear wheel 1 is provided at both ends of the drive shaft 2, and the rear wheel 1 has five stepped circumferential surface portions 1a to 1e whose diameters gradually increase toward the outside. It is continuously formed through H. Therefore, the left and right rear wheels 1 each have a substantially conical shape, and are provided in a state of facing each other with the smallest diameter circumferential surface portions 1a facing inward. The corresponding circumferential surface portions 1a to 1a, 1 of the rear wheels 1, 1 respectively
Each distance between b-1b, 1c-1c ... Has a width size corresponding to the width of each of the left and right rails 4, 4 described later. The pair of left and right parallel rails 4 on which the rear wheels 1 are mounted extend as a whole with a minimum rail width size A, and a part thereof has a maximum rail width size E. The minimum rail width size A gradually changes to the maximum rail width size E, and during the change, the intermediate rail width sizes corresponding to the intermediate diameter circumferential surface portions 1b to 1d continuously pass. There is. Further, as shown in the side view of FIG. 2B, the rail 4E corresponding to the maximum rail width size E has a rail width size smaller than that of the rail 4A corresponding to the minimum rail width size A. Not only is it larger, but it is set lower by the dimension S corresponding to the radius difference between the smallest diameter circumferential surface portion 1a and the largest diameter circumferential surface portion 1e, and also gradually changes from the rail 4A to the rail 4E. .

Next, the running operation of this dolly (rear wheel 1) will be described. The rear wheel 1 running on the rail 4A at the slowest speed on the smallest diameter circumferential surface portion 1a corresponds to the larger diameter circumferential surface portion as the rail width size of the rail 4 increases from A to E. It travels on the rail 4, and eventually travels at the fastest speed on the maximum diameter circumferential surface portion 1e. Then, next, the rear wheel 1 traveling on the rail 4E at the fastest speed on the largest diameter circumferential surface portion 1e is gradually changed to the smaller diameter circumferential surface portion as the rail width size of the rail 4 becomes smaller from E to A. On the corresponding rail 4, and eventually the minimum diameter circumferential surface portion 1e
Drive at the slowest speed. In this manner, the rail 4 sequentially and selectively contacts the circumferential surface portions 1a, 1b, 1c, ... And thereby the speed changes according to the width of the rail. In addition, since it is set so that it gradually changes from the rail 4A to the rail 4E and is lowered by the dimension S,
The height of the dolly is also fixed. Incidentally, it is of course possible to drive at an intermediate speed by setting the rail width size.

The level difference H can regulate the rail 4 but must be such that it can be easily transferred. Further, regarding this dimension S, the traveling inertia of the carriage is utilized when the rail 4 tries to contact the larger diameter circumferential surface portion, so that the rail 4 can be transferred more easily.

FIG. 3 is a diagram showing another embodiment of the present invention. An intermediate portion U of the rail 5 is inclined, and a lower side portion V and an upper side portion W are horizontal, and horizontal portions V and W for people to get on and off the truck 6 and to load and unload luggage.
Is set to a low speed, and the other intermediate portion U (inclined portion) is set to a high speed in order to move up and down and convey in a short time. With respect to other configurations, duplicated description is omitted for application of the above-described embodiment shown in FIG.

In addition to this, the step H may be eliminated to form a conical taper. In this case, for example, one rail having a wide width and the left and right corners (edge portions) of two rails are formed. As an alternative, it is also possible to use it in the form of an inclined surface corresponding to the tapered surface. Furthermore, there is a use method in which the present invention is developed to change the dolly into individual moving plates of the escalator so that only the lower end and upper end where a person gets in and out slows down, and the middle part raises speed. There is also a method used on the sidewalk.

[0010]

The shifting structure of the self-propelled trolley according to the present invention has the contents as described above, and is independent of the trolley.
Even a self-propelled trolley that does not use a separate transmission and rotates the wheels at a constant speed does not require a large-scale mechanism and can smoothly speed up or slow down a specific section of the rail. It is a thing. Further, its application is wide, and it is extremely effective when it is used for a carriage for use in various work processes and especially for an escalator for a long distance.

[0011]

[Brief description of drawings]

FIG. 1 is a side view showing a relationship between a rear wheel and a rail according to an embodiment of the present invention.

FIG. 2 is a plan view (a) and a side view (b) of an embodiment according to the present invention.

FIG. 3 is a side view showing another embodiment according to the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Rear wheel (wheel) 1a, 1b, 1c, 1d, 1e ... Circular surface part 2 ... Drive shaft 3 ... Drive motor (driving means) 4, 5 ... Rail A, E ... Rail width size H ... Step

Claims (1)

[Scope of utility model registration request] 1. A self-propelled carriage having a driving wheel and a driven wheel that rotate at a constant speed by a driving means and traveling on two parallel and continuous rails, wherein the driving wheel and the driven wheel are inside along an axle. Alternatively, it is formed in a substantially conical shape having a plurality of circumferential surface portions that are continuously formed via a predetermined step so that the diameter gradually increases toward the outside, and the rail width on which the driving wheels and the driven wheels roll is continuously formed. Both the left and right wheels can be increased or decreased to select the circumferential surface with the same diameter, and the rail height difference corresponding to the radius difference of the selected circumferential surface is continuously increased or decreased to increase or decrease the self-propelled bogie. A speed change structure for a self-propelled trolley that allows the running speed to be changed in a desired rail section by making the height position substantially unchanged.