JPS5836161Y2 - Lower frame crossed pantograph - Google Patents

Description

[Detailed explanation of the invention] Compared to diamond-shaped pantographs with the same operating range, the cross-shaped pantograph has the advantage of occupying a smaller area on the roof and having a smaller equivalent mass. It can even be difficult to install.

However, in conventional cross-shaped pantographs, the lower frame passes over the main shaft, so the folding height cannot be reduced, and when folded, the lower frame hits the main shaft and is prone to damage or bending. However, in order to avoid this, if the main shaft and lower frame were made thinner, the strength would be insufficient and the product could not be put to practical use.

This invention was made to eliminate the above drawbacks.
The details of the present invention will be explained below with reference to the drawings.

FIG. 1 is a side view showing an example of the framework of a conventional cross-shaped pantograph, showing the pantograph in a folded state, and FIG. 2 is a plan view of the lower frame portion thereof viewed from above.

Main shafts 1 and 2, which are installed on the roof of a vehicle in a direction perpendicular to the traveling direction of the vehicle, are each rotatably supported at both ends by bearings 5 fixed on the roof of the vehicle.

Main shafts 1 and 2 have lower frames 3, 3' and 4, 4, respectively.
' are fixed at one end and installed so as to intersect with each other, and the upper frames 8, 8' are fixed at the other end by an intermediate hinge 6.
and 9, 9' are rotatably connected to one end.

The other ends of the upper frames 8 and 9 and 8' and 9' are rotatably connected to each other by a top hinge 7.
, 9 and the lower frames 3', 4' and upper plates 8', 9' constitute a lower frame intersecting pantograph.

A spring lever 12, a folding lever 13, and a counterbalance lever 10 are fixedly attached to the main shaft 1, and a counterbalance lever 11 is fixedly attached to the main shaft 2, respectively, for stable operation of the lower frame intersecting pantograph.

FIG. 3 is a side view for explaining the operation of the counterbalancing lever.A counterbalancing lever 10 is fixedly attached to the main shaft 1 facing downward, and a counterbalancing lever 11 is fixedly mounted to the main shaft 2 facing upward. 11 is rotatably connected to a counterbalance rod 16 near its tip.

The counterbalance rod 16 consists of a threaded rod 14 and a turnbuckle 15, and its length can be adjusted as appropriate.
When the main shaft 1 rotates by a certain angle, the main shaft 2 is configured to rotate in the opposite direction by an angle substantially equal to the angle.

That is, when the main shaft 1 rotates by a certain angle in the counterclockwise direction, which is the direction in which the pantograph is raised, the main shaft 2 is also rotated by approximately the same angle in the clockwise direction, which is the direction in which the pantograph is raised.

FIG. 4 is a side view for explaining the operation of the spring lever, showing the vicinity of the tip of the spring lever 12 fixedly attached downward to the main shaft 1, and the fixing member 18 attached to the roof of the vehicle.
A tension spring 17 is mounted between the pantograph and the pantograph, and provides a rotational force to rotate the main shaft 1 in a counterclockwise direction, and this force always acts in the direction of raising the pantograph.

FIG. 5 is a side view for explaining the operation of the folding lever. A roller 19 is rotatably attached to the vicinity of the tip of the folding lever 13 fixedly attached to the main shaft 1 in a downward direction. A lowering cylinder 20 equipped with a piston rod 21 for pushing is mounted on the roof of the vehicle, and the piston rod is pushed out in response to a command to lower the pantograph, pushing the roller 19 and lifting the folding lever 1.
3 provides clockwise rotational force to the main shaft 1 by overcoming the rotational force by the spring 17 applied to the main shaft 1,
Make a motion to lower the pantograph.

Fig. 6 is a perspective view of the main shaft part, and each reference number is 1 to 5.
The same symbols as the parts shown in the figure are shown.

The function of the main shaft 1 will be more clearly understood from this figure.

FIG. 7 is a plan view of the upper part of the intersecting upper frame pantograph shown in FIG. 1, viewed from above, with upper part 8.8', 9.
9' are the lower frames 3, 3', and 4.4' shown in Figure 2, respectively.
and are rotatably connected by an intermediate hinge 6, and upper frames 8 and 9 and 8' and 9' are respectively rotatably connected by a top hinge 7.

The arrangement order of each type of vehicle in the direction perpendicular to the direction of travel is as follows:
Lower frame 3, upper frame 8, upper frame 9, lower frame 4, lower frame 3', upper Azusa 8'
, the upper frame 9', the lower frame 4', and the distance between the respective frames located on the left and right, that is, the distance between the lower frames 3 and 3', the upper frame 8,
8', between the upper frames 9, 9', and between the lower frames 4, 4' are assembled so that the distances are equal.

In the conventional cross-frame pantograph having such a structure, as shown in FIGS. 1 and 2, the lower frames 4 and 4' are connected to the main shaft 1, and the lower frames 3 and 3 are connected to the main shaft 2. ' interferes with the folding height, making it impossible to reduce the folding height sufficiently, and if the main shafts 1 and 2 and the lower frames 3, 3', and 4.4' are made thinner, the strength may be insufficient and it may not be practical. there were.

The present invention has been made to improve the above-mentioned drawbacks, and the details of the present invention will be explained below based on one embodiment with reference to the drawings.

FIG. 8 is a plan view of the lower frame portion of an embodiment of the cross-shaped lower frame pantograph of the present invention, viewed from above.

Components with the same symbols as in FIGS. 1 to 6 indicate components having the same functions.

Similar to the main shaft 1 of the conventional cross-frame pantograph shown in FIG. 2, the main shaft 1' has lower frames 3 and 3' fixed at one end, as well as a counterbalance lever 10, a spring lever 12, and a folding lever 13. Although it is fixedly mounted and rotatably supported by a bearing 5 fixed on the roof of the vehicle,
These mounting positions are different from conventional lower frame crossed pantographs.

That is, the bearings 5 are not placed at both ends but at the lower frames 3, 3.
A main shaft 1' is supported inside the main shaft 1', and counterbalance levers 10 are fixedly attached to both ends of the main shaft 1'.

The main shaft corresponding to the other main shaft 2 is divided at the center to form main shafts 2' and 2'', and the bearing 5' also receives the moment load fixed on the roof of the vehicle.
Each is rotatably supported at one end.

A counterbalancing lever 11 is fixedly attached to the end opposite to the bearing of these main shafts 2', 2'', and a lower frame 4 is attached to the main shaft 2' at an intermediate portion between the bearing 5' and the counterbalancing lever 11.
A lower frame 4' is fixed to one end of the frame 4'.

The main shafts 2t, 2tt are arranged in positions where the counterbalancing levers 11 mounted thereon face the counterbalancing levers 10 mounted on both ends of the main shaft 1', and the lower frames 4, 4' They are installed so that they do not cross over.

The operations of the spring lever 12, folding lever 13, and counterbalance lever 10.11 in the lower frame configured as described above are the same as in the case of the conventional lower frame cross-shaped pantograph explained with reference to Figs. 3 to 5, so the explanation will be omitted. do.

FIG. 9 is a plan view of the upper part of the above-mentioned embodiment of the lower frame intersecting pantograph of the present invention, viewed from above, and the same reference numerals as in FIGS. 1 and 7 indicate parts having the same functions.

The upper frames 8.8' and 9°9' are rotatably connected to the lower frames 3, 3' and 4.4' shown in FIG. ' and 9' are each rotatably connected by a top hinge 7.

The arrangement order in the direction perpendicular to the direction of movement of both strokes of each is as follows:
Lower frame 4, upper frame 9, upper frame 8, lower frame 3, lower frame 3', upper Azusa 8'
, upper frame 9', and lower frame 4', and the distances between the frames located on the left and right are all different, and the sizes are different from those of the lower frame 4,
Between 4', between upper frames 9 and 9', between upper frames 8 and 8', between lower frames 3 and 3
The order is between '.

The cross-shaped pantograph with a lower frame according to the present invention, which is constructed in this way, has the advantages of a pantograph with a crossed lower frame in that the main axis and the lower frame do not interfere with each other, so it occupies a small area on the roof and has a small equivalent mass. The folding height can be made sufficiently small.

[Brief explanation of drawings]

Figure 1 is a side view showing an example of the framework of a conventional cross-shaped pantograph, Figure 2 is a plan view of the lower frame seen from above, and Figure 3 is a diagram for explaining the operation of the counterbalance lever. 4 is a side view for explaining the operation of the spring lever, FIG. 5 is a side view for explaining the operation of the folding lever, FIG. 6 is a perspective view of the main shaft, and FIG. 7 is a side view for explaining the operation of the spring lever. FIG. 2 is a plan view of the upper part of the lower frame intersecting pantograph shown in FIG. 1, viewed from above. FIG. 8 is a plan view of the lower frame portion of an embodiment of the lower frame intersecting pantograph of the present invention, viewed from above, and FIG. 9 is a plan view of the upper frame portion thereof, viewed from above. 1.1', 2.2', 2"...Main shaft, 3.3'
, 4.4'...Lower frame, 5゜5'...Bearing, 6...Middle hinge, 7...Top hinge, 8.8' , 9.9'...Kamiazusa, 10.1
1...Balance lever, 12...Spring lever, 13...Folding lever.

Claims (1)

[Scope of utility model registration request] By splitting one spindle into two and rotatably supporting them individually, and placing the lower frame attached to each of these two spindles outside the other spindle, the system eliminates interference between the spindle and the lower frame. , a cross-shaped pantograph with a lower frame characterized by a lower folding height.