JPS6127224B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transport vehicle that runs on two rails by rolling its wheels.

BACKGROUND ART Vehicles that run on rails have traditionally been used in many ways, not only on general railways. For example, they are often used to transport and move goods in factories, warehouses, mines, ports, steel mills, shipyards, etc. This is due to the advantages of lower running resistance (especially when steel wheels are used versus copper rails) than other transportation and transportation methods, no need for steering, and a fixed running route. It is something.

However, this system has a problem with passing through curved roads, and the smaller the radius of the curved road, the greater the running resistance and the greater the wear on the rails and wheels. In the worst case, there is a risk of derailment. Therefore, it is well known that in general railways, the radius of the curved road is made as large as possible.

However, recently there has been a need to efficiently use space, especially in factories and warehouses, and as many buildings are built on a limited site and rails are laid between them, it is necessary to reduce the radius of curved roads. I have no choice but to do it.

Therefore, the way a conventional two-axle transport vehicle passes through a sharply curved road will be explained using Figures 1 and 2.
FIG. 1 is a side view of the two-axle transport vehicle, and FIG. 2 is a plan view taken along line AA in FIG. 1, showing the relationship of the rails of the wheels. In the figure, 1 is the loaded cargo, 2 is the underframe of the vehicle, 3 is the axle box holder installed on the front, rear, left and right sides of the bottom surface of the platform 2, and 4 is the axle box supported one by one on each axle box holder 3. , each has a built-in bearing. Reference numeral 5 indicates a pair of front and rear fixed axles that are horizontally supported by rotatably supporting both ends on the left and right axle boxes 4, 4, and 6 indicates wheels, two each of which are attached to the front and rear axles 5, 5. This is a form used in railways and the like, that is, it has a flange 5a on the inside. 7 is two rails. Now, as shown in Fig. 2, the distance between the fixed axes is 2b, the radius of the outer rail 7 is R ₁ , its center is O, the angle between the direction in which the wheels 6 are facing and the tangential direction of the rail is θ, and the center If the angle between the vehicle center line passing through O and the line connecting the wheel 6 to the center O is θ', then sinθ' = b/R ₁ θ ₁ = θ, so the smaller R ₁ is, the larger θ is. As I get older,
It becomes difficult to pass through curved roads.

The above are the reasons why it is difficult for general vehicles to pass through sharply curved roads in the past, but there is another prior art that should form the basis of the present invention, which is shown in Figures 3 and 4 below. Figure 3 is a side view of the vehicle with one more axis added to the one shown in Figures 1 and 2, and Figure 4 is a plan view taken from B-B in Figure 3. The numbers 1 to 7 and the symbols O, θ, θ' in FIGS. 3 and 4 indicate the same ones as in FIGS. 1 and 2. Regarding other symbols, 8 is a sliding plate fixed to the lower surface of the underframe 2, 9 is a pair of left and right axle box holders added to be slidably arranged on the lower surface of the sliding plate 8, and 10 is each axle box. One axle box is supported by the receiver 9, 11 is one movable axle horizontally supported by the left and right axle boxes 10, 10, and 12 is the axle 1.
1 Wheels with flanges installed near both ends, 1
Reference numeral 3 denotes a center pin protruding from the lower surface of the underframe 2, and 14 a central rod mounted on the underside of the underframe 2 so as to be rotatable from side to side around the center pin 13; The axle box holders 9, 9 are connected to both ends so as to be supported. In addition, G in the figure is the distance between the inner and outer rails 7, 7, which is called the gauge, and Lc
is the center line of the inner and outer rails 7, 7, and _R2 is the radius of the center line Lc centered on the center O. 2b is the distance between the fixed axles, and a is the movable axle 11 added from the center between the fixed axles.
x is the distance from the movable shaft 11 to the center pin 13. In the figure, 12' is a wheel located on the straight rail 7'.

Here, in FIG. 3, the load of the loaded cargo 1 is the underframe 2, the axle box holder 3, the axle box 4, the fixed axle 5, the underframe 2, the sliding plate 8, the axle box holder 9, the axle box 10, and the movable axle 1.
1 so that the load can be applied to all wheels 6... and 12, 12.

Therefore, in FIG. 4, on the straight rail 7', the wheels 6 of the fixed axles 5, 5 and the wheels 1 of the movable axle 11
2', the running direction of both rails 7' coincides with the direction of the rail 7', so there is no problem in running in this state.

Moreover, on the curved track 7, the fixed axle 5,
The wheels 6 of the movable axle 11 have an angle of θ with respect to the tangential direction of the rail as in FIG.
By appropriately selecting the distance x, the extension of the center line of the wheel 12 can be made to coincide with the center O. That is, since the running direction of the wheels 12 can be made to coincide with the tangent to the curve, the vehicle can smoothly pass through the curve.

In Fig. 4, the positions of the fixed axles 5 and 5 are M and N on the center line on the straight rail 7', the position of the additional movable axle 11 is Q', and the center line of the curved rail 7 of the movable axle 11 is Lc. If the upper position is Q and the center of rotation of the center rod 14 is P, the above M and N are located on Lc, but are not tangent to Lc. On the other hand, Q
Since Q' moved and came on Lc, '==x
At that time, it becomes a tangent that touches Lc at point Q.

To explain this using FIG. 5, the symbol S
is the midpoint of , u is the distance between OPs, v is the distance between OSs, and the rest is the same as in Fig. 4.

Therefore, since ∠PQO and ∠PSO are right angles, u ² = R ² ₂ + x ² ...(1) u ² = v ² + (a-x) ² ... (2) ∴R ² ₂ + x ² = v ² +(a−x) ² …(3) Furthermore, v ² =R ² ₂ −b ² …(4) Substituting (4) into (3) and rearranging, x=a ² −b ² /2a … (5) If x is selected in the relationship shown in equation (5), the wheel 12 in Fig. 4
The direction of travel always coincides with the tangential direction of the curved track 7, regardless of _R2 .

As described above, it is composed of a pair of left and right axle box holders 9, an axle box 10, one movable axle 11, a pair of left and right flanged wheels 12, a center pin 13, and a center rod 14 in FIGS. 3 and 4. This is called a center bogie 15, and has been conventionally used as a leading bogie or a follower bogie of a steam locomotive.

This invention is based on the above-mentioned prior art, that is, when a fixed axle and a movable axle of a centering truck are provided as shown in FIGS. 3 and 4, and the load is shared between them, the movable axle Considering the fact that wheels with a fixed axle have no difficulty in running around curves, the idea was to create a structure that takes advantage of these advantages and eliminates all of their disadvantages. The object of the present invention is to provide a transport vehicle that can run safely on rails while reducing running resistance and wear between wheels and rails.

A first embodiment of the present invention will be described below with reference to FIGS. 6 and 7. Figure 6 is a side view, and Figure 7 is a side view.
This is a plan view taken from CC in the figure, and numbers 1, 2, and 7 to 15 in these figures indicate the same configuration as in Figures 3 and 4, and 2b, a, and x are also the same. Although a detailed explanation thereof will be omitted, here, two centering carts 15 are provided, one at the front and one at the rear under the underframe 2, with their directions reversed in the front and rear end directions. The entire load of the loaded cargo 1 is borne by the centering carts 15, 15 alone. Therefore, the axle box holder 3, axle box 4, fixed axle 5, and wheel 6 for the fixed axle described in FIGS. 3 and 4 are unnecessary and are not provided in the models shown in FIGS. 6 and 7. First, a guide axle 1 is installed hanging from the lower surface of the underframe 2 at a position corresponding to the mounting location of each axle box holder 3 in FIGS. 3 and 4.
6 are fixed to each other, and the lower ends of the rails 7 contact and roll against the mutually opposing inner side surfaces of the rails 7, 7, thereby guiding and holding the underframe 2 in a horizontal positional relationship in a direction perpendicular to the direction of movement. A guide wheel 17 is provided in each case.

Therefore, as shown in Fig. 6 and Fig. 7, the center carriage 15
are placed in front and behind, and the entire load is borne by these.
If the guide mechanism consisting of the guide axle 16 and the guide wheel 17 is arranged at a position corresponding to the fixed axle 5, 5 line in FIGS. 3 and 4, and x is determined by the equation (5) above, then Since each wheel 12 of the bicentric bogies 15, 15 faces in the tangential direction of the rail 7, regardless of the size of the radius of the curve, there is no difficulty in running on a sharp curve.
Allows for stable driving.

Next, a second embodiment of the present invention will be explained with reference to FIGS. 8 and 9. In the case of the first embodiment shown in FIGS.
2 are arranged at the front and rear ends of the lower surface of the underframe 2, and the guide wheels 17 are arranged near the center of the lower surface of the underframe 2. However, in this second embodiment, the guide wheels 17 are arranged at the front and rear ends of the lower surface of the underframe 2. The wheels 12 of the centering carts 15, 15 are arranged closer to the center of the lower surface of the underframe 2, and everything else is the same as that of the first embodiment.

In the case of the second embodiment shown in FIGS. 8 and 9, the wheels 12 of the centering truck 15 are oriented in the tangential direction of the curved track 7 using the same symbols as shown in FIG. Since ∠PQO and ∠PSO are right angles, u ² =R ² ₂ +x ² …(6) u ² =v ² +(a+x) ² …(7) ∴R ² ₂ +x ² =v ² +(a+x) ² …(8) Furthermore, v ² =R ² ₂ −b ² …(9) Now, if we substitute (9) into (8) and rearrange, x=b ² −a ² /2a …( 10) Therefore, if x is determined by this equation (10), the wheels 12 of the centering bogie 15 will always face in the tangential direction of the curved rail 7, regardless of the size of the radius of the curve, which is difficult. You will be able to drive without it.

Further, a third embodiment of the present invention will be described with reference to FIG. 11. In addition, in the first embodiment, the guide wheel 17 is
Compared to the one arranged at the position A in Fig. 0 and the position A shown by the phase image line, in this third embodiment, it is arranged at the position A and C in Fig. 10, so that it contacts only the rail 7 on one side. The underframe 2 is guided by the guide wheels 17, 17 located at A and A, and the distance t between the points where the guide wheels 17, 17 located at A and A touch the rails 7, 7 at the same time, and an error according to the radius of the curve. Even if this occurs, this third
Good guidance is always obtained in the embodiments.

Furthermore, a fourth embodiment of the present invention will be described with reference to FIG. 12. This also has a different arrangement of the guide wheels 17 for the same reason as the third embodiment, and as shown in FIG. , 17 are arranged on both sides of the outer rail 7, and the other pair of guide wheels 17, 17 are arranged on both sides of the inner rail 7.

Note that the present invention is not limited to the first to fourth embodiments described above, and may be applied to other embodiments, such as the 11th embodiment.
The arrangement method of the guide wheels 17 shown in FIGS. 8 and 9 may be applied to those shown in FIGS.
It is also possible to add more centering carts to those shown in FIGS. 7, 8, and 9.

In addition, in the explanation up to now, the left and right wheels 12, 12 are fixed to the movable wheels 11 of the centering truck 15 and rotated together. Since the running distance of the wheels 12 is longer than that of the wheels 12 which run on the inner rails, slipping occurs between the wheels and the rails, so it is better to support the left and right wheels 12 so that they can rotate freely with respect to the axle 11. .

Furthermore, in the explanations so far, this invention has been applied to non-powered vehicles, but it can also be applied to powered vehicles. However, other propulsion methods may also be used. Further, although the guide wheel 17 is supported by the guide wheel 16 fixed to the lower surface of the underframe 2, an elastic device is interposed between the underframe 2 and the guide wheel 16 or between the guide axle 16 and the guide wheel 17. Alternatively, the guide wheels 17 may be brought into contact with the rail 7 with an appropriate force so that irregularities in the rail 7 can be dealt with.

Since this invention has been made as detailed above, it is possible to safely create a running passage on a sharply curved rail with less resistance, and it is possible to reduce the dead space (for example, the distance between buildings) required by conventional large curved rails. This makes it possible to obtain significant economic effects.

[Brief explanation of the drawing]

Fig. 1 is a side view of a conventional two-axle transport vehicle, Fig. 2 is a plan view taken from line A-A in Fig. 1, and Fig. 3 is a side view of a conventional vehicle with a centering truck. Figure 4 is the third
5 is an explanatory diagram showing the relationships shown in FIG. 4, FIG. 6 is a side view showing the first embodiment of the present invention, and FIG. FIG. 8 is a side view showing the second embodiment of the invention, FIG. 9 is a plan view taken from line D--D in FIG. 8, and FIG. FIG. 9 is an explanatory diagram showing various relationships, FIG. 11 is a plan view showing a third embodiment of the invention, and FIG. 12 is a plan view showing a fourth embodiment of the invention. 1...Loading cargo, 2...Underframe, 3...Shaft box holder,
4...Axle box, 5...Fixed axle, 6...Wheel, 7...
...Rail, 7'...Straight rail, 8...Slide plate, 9...
...Axle box holder, 10...Axle box, 11...Movable axle, 1
2... Wheel, 13... Center pin, 14... Center rod, 15... Center truck, 16... Guide axle, 17
...Guiding wheel.

Claims (1)

[Claims] 1. A transportation vehicle that travels by rolling wheels on two left and right rails, which has left and right flanged wheels that roll on the two rails, respectively, and whose traveling direction is set on a curved rail section. Then, a pair of centripetal bogies whose dimensions are determined so that they always coincide with the tangent line of the curve are placed near the front and rear ends of the underframe of the vehicle, and are installed to bear the entire load of the vehicle. At the same time, two pairs of guide wheels are installed on the underside of the vehicle's underframe to guide the vehicle's underframe only in a direction perpendicular to the direction of travel by rolling in contact with the side surfaces of the rails. A transport vehicle characterized in that it is configured to be freely rotatable via guide axles protruding from the front and rear ends.