JPH0784151B2 - Rigid trolley wire - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a rigid trolley wire laid parallel to a track for supplying electricity to a running train or the like. In particular, the present invention relates to a rigid trolley wire in which a stainless steel current collector plate is provided on the current collector surface in order to improve wear resistance of the current collector surface.

(Prior Art and its Problems) FIG. 8 shows a conventional example, in which a stainless steel current collector plate is used.
The structure is such that 41 is pressed against a convex trolley main material 40 made of copper or aluminum by hot extrusion.

In the structure shown in FIG. 8, when the current collector plate 41 has reached the limit of wear, the entire trolley wire must be replaced, which requires time for maintenance such as replacement work. Moreover, there are the following technical issues.

Due to the difference in thermal expansion coefficient between the trolley main material 40 and the current collector plate 41, a bimetal effect occurs when the temperature changes, and the entire trolley wire is distorted,
As a result, the current collector plate 41 and the trolley main material 40 may be displaced in the length direction or peeled off at the end portions in the wire length direction, which may cause a failure in energization.

Further, when the trolley wire is curved corresponding to the curved track, the trolley main material 40 and the current collector plate 41 are displaced in the lengthwise direction during the machining, which may cause peeling or buckling of the current collector plate 41. Occurs.

In the conventional example shown in FIG. 9, a stainless steel current collector plate 47 is formed in a U shape and is covered with an aluminum reinforcing member 46, and a current collector is provided between both ears 45a of a trolley main member 45 made of aluminum. This is a structure in which the plate 47 is fitted and the ears 45a are caulked to fix the current collector 47 to the trolley main member 45.

Even with the structure shown in FIG. 9, when the wear of the current collector plate 47 reaches its limit, the entire rigid trolley wire must be replaced, which requires time for maintenance such as replacement work.

Further, as in FIG. 8, the current collector plate 41 is apt to be displaced, peeled or buckled due to the difference in thermal expansion coefficient. Further, since the current collector plate 47 is simply covered by the reinforcing member 46, the current collector plate 47 is
Almost no surface pressure is applied between the 47 and the reinforcing member 46,
As a result, the electric resistance at the time of current collection may increase, and the current collector plate 47 may burn. That is, since stainless steel has lower conductivity than aluminum or copper, when the stainless steel current collector plate 47 is provided as described above,
In order to maintain good electrical conductivity, it is required to secure sufficient surface pressure on the contact surface between them.

(Object of the Invention) An object of the present invention is to provide a rigid trolley wire in which a stainless steel collector plate is provided on a trolley main material having high conductivity, and to facilitate easy maintenance and replacement when the collector plate is worn. The purpose of the present invention is to prevent peeling and the like due to the deviation of the current collector plate due to the difference in the coefficient of thermal expansion and to ensure excellent electrical conductivity between the current collector plate and the trolley main material.

(Technical means for achieving the object) In order to achieve the above object, the invention according to claim 1 of the present application,
A rigid trolley wire provided with a trolley main material made of highly conductive copper or aluminum having a convex cross section and a current collector plate made of stainless steel or the like that forms a current collecting surface and has good wear resistance. In, the current collector plate is formed into a U-shaped cross section having both side walls, and is covered on the head of the trolley main material on the current collecting surface side, and the connecting pins are inserted into both side walls of the trolley main material and the current collector plate. By forming pin holes for each, and slightly eccentric to the current collecting surface side with respect to the position of the pin hole of the trolley main material, the position of the pin hole on the side wall of the current collector plate when the coupling pin is not inserted, The current collector plate is pressed against the trolley main material by the restoring force of the pin at the time of inserting the coupling pin, and both ends of the coupling pin and both side walls of the current collector plate are clamped by the bolt and the nut and washer attached to the bolt. I have to.

The invention according to claim 2 is the same as the invention according to claim 1,
As a coupling pin, a hollow split pin having a C-shaped cross section is inserted, projections are formed on the nut and washer, and the projections are inserted at both ends of the split pin.

The invention according to claim 3 is the same as the invention according to claim 1,
A cross-sectional shape of the trolley main material head covered with the current collector plate is formed in an H shape having grooves at both ends in the pin length direction, and the inner surface of the groove is formed in the pin length direction. It is formed in a taper shape so as to come to the pin center line side as it goes to the central part side.

(Operation) For example, the pin holes of the current collector plate before the pin insertion are eccentric to the current collecting surface side of the pin holes of the main material of the trolley, and the coupling pins are inserted into the both holes. The current-collecting plate and the end surface of the trolley main material on the current-collecting surface side are always in pressure contact with each other due to the restoring force (spring action), so good electrical conductivity between the current-collecting plate and the trolley main material is ensured. To do.

Further, by removing the bolts, nuts and washers and pulling out the pins, the current collector plate and the trolley main material can be disassembled, whereby only the current collector plate can be replaced when the current collector plate is worn, and maintenance is easy.

Furthermore, since both ends of the connecting pin and both sides of the current collector plate are held by nuts and washers, the pins are prevented from falling off.
It is possible to prevent the both side walls of the current collector plate from opening and prevent the current collector plate and the trolley main material from shifting in the longitudinal direction. Therefore, the current collection performance is good.

Further, the cross-sectional shape of the head portion of the trolley main material to be covered with the current collector plate is formed in an H shape having grooves at both ends in the pin direction, and the inner surface of the groove is formed at the center in the pin direction. By forming the taper so as to come closer to the center line side of the pin as it goes to the side, the pin serves as a three-point support of both ends and the central part. Therefore, an effective spring action can be expected due to the bending of the pin, while there is no concern that the pin will be sheared between the side wall of the current collector plate and the head of the trolley main material.

(Example) FIG. 1 shows an enlarged vertical section of a rigid trolley wire to which the present invention is applied. In FIG. 1, a rigid trolley wire 9 is a copper trolley main material 10 having good conductivity and a stainless steel. It is composed of a current collector plate 13 and the like. The trolley main material 10 integrally has a flange portion 11 at the base end portion (the right end portion in FIG. 1), whereby the cross-sectional shape is formed into a substantially convex shape (T shape),
A bulging head 12 is integrally formed at the tip of the current collecting surface H side. Head 12 in the pin length direction (vertical direction in Fig. 1)
Grooves 12b are provided at both ends of the trolley main material 10 respectively.
(Provided continuously in the lengthwise direction), thereby forming a constricted portion (web) 12a in the central portion.
That is, the head 12 has a substantially H-shaped cross section, and the constricted portion 12a is formed with a pin hole 15 penetrating in the vertical direction. The inner surface of the groove portion 12b is formed in a tapered shape so as to come to the pin hole center line O1 side as it goes to the constricted portion 12a side. In other words, the width D of the groove 12b is tapered so that it becomes narrower toward the constricted portion 12a.

The current collector plate 13 is integrally formed with both side walls 14 so that its cross-sectional shape is formed into a generally U-shape, and the head 12 of the trolley main material 10 is covered with the pin holes 16 on both side walls 14. Has been formed.

The center line O2 of the pin hole 16 of the current collector side wall 14 is eccentric to the current collecting surface H by a slight eccentricity c with respect to the center line O1 of the pin hole 15 of the trolley main material 10. A hollow split pin 27 having a C-shaped cross section is penetrated through the both holes 15 and 16, whereby a current collector plate is provided.
13 and the trolley main material 10 are joined. Tapers are formed on both ends of the pin 27, and both holes 15 and 16 are formed as described above.
Even if they are displaced from each other, they can be easily inserted into the pin holes 15 and 16.

A tubular nut insertion hole 30 is formed in the portion of the trolley main member 10 adjacent to the head portion 12, and a tubular nut 17 is inserted into the insertion hole 30 from below, for example. The cylinder nut 17 integrally includes a flange portion 17a that abuts a side surface of the trolley main member 10 and an arm 21 that abuts a side wall 14 of the current collector plate. The arm 21 is formed with a projection 22 that projects into the inner peripheral surface of the end of the pin 27, and serves to prevent the nut 17 from rotating. The upper end of the tubular nut 17 penetrates the trolley main material 10 and extends upward, and the washer 23 is fitted therein and the bolt 19 is screwed. A hexagonal hole 26 is formed in the bolt head 19a. Bolt head 1
The washer 23 pressed by the 9a has a bent portion 23a on the base end side of the trolley main material, and the tip of the bent portion 23a is in contact with the side surface of the trolley main material 10. A protrusion 24 is formed at the tip of the washer 23 so as to project into the inner peripheral surface of the end of the pin 27, and serves to prevent the washer 23 from rotating.

FIG. 2 is a view taken in the direction of arrow II in FIG. 1 and shows the pin hole 16 of the collector plate 13.
Is a long hole in the length direction of the trolley wire, so that, for example, when bending the trolley wire into a curved shape, the current collector plate
Absorbs lengthwise deviation between the trolley main material 10 and the trolley 10,
No excessive load is applied to 27.

FIG. 3 is a view taken in the direction of arrow III in FIG. 1 and clarifies the shapes of the flange portion 17a and the arm portion 21 of the tubular nut 17.

FIG. 4 shows a perspective view when disassembled, in which the pin holes (long holes) 16 of the current collector plate 13 are arranged at intervals of 40 cm, for example, and the pin holes 15 of the trolley main material 10 also have the current collector plate 13 side. Corresponding to the pin hole 16 of
It is arranged at 40 cm intervals.

Both the current collecting surface H of the current collecting plate 13 and the tip end surface of the head 12 of the trolley main material 10 are formed in a gentle arc, but as shown exaggeratedly in FIG. The radius of curvature R2 of the current collector plate 13 is slightly larger than the radius of curvature R1 of the main material head 12, and the pin 27 when assembled
The bending of the current collecting surface portion of the current collector plate 13 due to the insertion of the coil causes the radius of curvature to be substantially the same as the radius of curvature R1 of the head 12.

FIG. 7 shows an example of using a rigid trolley wire, which is an example used for supplying electricity to a tire type calculator. In FIG. 7, a train 1 is equipped with running tires 2 and a guide wheel 5 for preventing falling, and runs on a track surface 3 of a track device. A track sidewall or a parapet 7 (hereinafter referred to as a parapet) is provided on the side of the track surface 3, and a plurality of rigid trolley wires 9 are supported by the parapet 7 via a supporting device 8. The rigid trolley wire 9 is arranged parallel to the track, and the current collecting shoe 4 of the train 1 abuts on it.

The operation of the embodiment will be described in detail. Since both pin holes 15 and 16 in FIG. 1 are displaced so that the pin hole 16 on the side of the current collector plate 13 is located on the side of the current collecting surface, the sixth hole at the time of assembly is described. As shown in an exaggerated manner in the figure, the central portion of the pin 27 is in pressure contact with the end surface of the pin hole 15 of the trolley main member 10 on the side of the current collecting surface H, while both ends of the pin 27 are provided with the side wall 14.
Is pressed against the end surface of the pin hole 16 opposite to the current collecting surface H (direction of arrow A), whereby both ends of the pin 27 are on the current collecting surface H side, and the central portion is opposite to the current collecting surface side. Bends to come to. Accordingly, the restoring force (spring action) of the pin 27 urges the current collector plate 13 toward the arrow A direction at both ends of the pin, so that the current collector plate 13 is moved to the trolley main member 10.
It is pressed against the tip surface of the head to ensure a constant surface pressure. Therefore, official electrical conductivity between the stainless steel current collector plate 13 and the copper trolley main material 10 can be ensured.

Moreover, the shape of the head 12 of the trolley main member 10 is formed into an H shape having the groove portions 12b at both ends in the pin length direction, and the inner surface of the groove portion 12b becomes closer to the center of the pin in the length direction of the pin. By forming the pin 27 so as to come to the side, the pin 27 is supported at three points of its both ends and the central part.
Therefore, a large spring effect due to the bending of the pin 27 can be expected,
On the other hand, there is no concern that the pin 27 will be sheared between the side wall 14 of the current collector plate and the head 12 of the trolley main material.

In addition, the radius of curvature R2 of the current collector plate 13 in FIG.
By slightly increasing the radius of curvature R1 of, due to the bending of the current collector plate 13 due to the action of the pin 27 during assembly,
The top wall portion of the current collector plate 13 and the end face of the trolley head 12 are pressed against each other more strongly, so that the electrical conductivity between the both 13 and 12 is improved. By the way, the current collecting plate 13 has a short path since electricity flows in the plate pressure direction at the top wall portion thereof, and has good electrical conductivity. By the way, the side wall 14
When electricity flows in the direction along, the electric resistance is large, but in the present invention, due to the spring action of the pin 27 and the spring action of the current collector plate 13 itself as described above, the surface at the top wall portion having a low electric resistance. Good electrical conductivity because sufficient pressure can be secured.

At the time of assembly, since both ends of the pin 27 are held by the nut 17 and the washer 23 using the bolt 19 shown in FIG. 1, the pin 27 does not fall off due to vibration or impact of the train shoe. Since both side walls 14 of the current collector plate 13 are held by the nut 17 and the washer 23,
It prevents the collector plate 14 from opening and prevents the pin 27 from coming off.

When assembling the current collector plate 13 and the trolley main material 10,
13 is put on the head 12 of the trolley main material, and the pin 27 is driven into the pin hole 16 of the side wall 14 of the collector plate and the pin hole 15 of the head 12 by utilizing the tip taper portion thereof. Then, attach the nut 17 to the trolley main material 10
Of the pin 27 while inserting the projection 22 into the end of the pin 27, while fitting the washer 23 from above and the bolt 19
Are screwed together, and the protrusion 24 of the washer 23 is inserted at the end of the pin 27. The engagement between the projections 22 and 24 and both ends of the pin 27 prevents the nut 17 and the washer 23 from rotating when the bolt is tightened.

In addition, by making the pin hole 16 of the current collector plate 13 a long hole,
Even when the axial position of the current collector plate 13 and the trolley main material 10 is displaced during bending of the rigid trolley wire, damage to the pin 27 can be prevented,
Further, residual stress between the both 13 and 10 can be reduced, and buckling of the current collector plate 13 can be prevented.

When the current collector plate 13 is worn and needs to be replaced, remove the bolt 19, the nut 17, and the washer 23 and remove the pin 27 to remove the current collector plate 13 as shown in FIG. 4 and remove only the current collector plate 13. Replace with a new one.

(Another embodiment) (1) Pin holes in the current collector 13 as shown by phantom lines in FIG.
For example, three spare pin holes 15a and 16a (so-called dead holes) are formed at equal intervals, for example, between 16 and between the pin holes 15 of the trolley main material 10.

The rigid trolley wire has, for example, a fixed length of 7.5 m, and these are successively added. However, when the dimensions are matched on the spot, a random-sized product appears and the fixed-length product is cut. At this time, the spare pin holes 15a and 16a are used to arrange the coupling pin 27 as close to the end as possible.

(2) As the trolley main material, it is also possible to use highly conductive aluminium.

(3) A solid pin may be used as the coupling pin 27.

(3) The present invention is not limited to the one having the grooves 12b formed on both sides like the trolley main material head shown in FIG.
It can also be applied to a rigid trolley wire with a trolley main material head without.

(Effects of the Invention) According to the present invention as described above: (1) Since the current collector plate 1 made of stainless steel is mechanically coupled to the trolley main material 10 having high conductivity by using the coupling pin 27. When the current collecting surface H is worn, the current collecting plate 13 is used as the main material of the trolley.
Remove from 10 and replace only the current collector plate 13 with a new one. Therefore, replacement work, that is, maintenance of the trolley wire is easy.

Moreover, it is possible to prevent peeling and the like due to axial displacement as in the conventional case.

(2) Despite the fact that the current collector plate 13 can be detached from the trolley main material 10, good current-carrying performance between the current collector plate 13 and the trolley main material 10 can be ensured, and it is possible to collect electricity on a train or the like. Good electrical performance.

That is, generally, stainless steel has higher wear resistance than copper or aluminum but has low conductivity, but the pin holes 16 of the side wall 14 of the current collector plate are slightly charged with respect to the pin holes 15 of the trolley main material 10. Coupling pin 27 when assembled by shifting to the surface side
Because the restoring force (spring action) due to the flexure of the current collector ensures a sufficient surface pressure at the contact surface between the current collector plate 13 and the trolley main material 10, the conductivity of the current collector plate 13 and the trolley main material 10 is always maintained. Can be secured well and the current collection performance is good.

(3) Both ends of the coupling pin 27 and the current collector plate 13 by the washer 23 as well as the bolt 19 and the nut attached to the bolt 19.
Since both side walls of the current collector are clamped, it is possible to prevent the pin 27 from falling off due to vibration or shock, and also to prevent the current collector plate 13 from opening and preventing the pin 27 from coming off the current collector plate 13. Furthermore, by tightening the side wall 14 of the current collector plate, the axial deviation between the current collector plate 13 and the trolley main material 10 can be suppressed and reduced.

(4) In the invention according to claim 2, the above (1) and (2)
In addition to the effect of (3), by utilizing the connecting pin 27 having a C-shaped cross section, the spring action due to the bending can be effectively exerted, and the surface pressure between the current collector plate 13 and the trolley main member 10 can be further enhanced. Can be effectively secured.

Further, since a hollow coupling pin 27 having a C-shaped cross section is used and the raised portions 22 and 24 of the washer 23 and the nut 17 are engaged with both ends of the pin 27, the bolt 19 and the like are prevented from rotating. As a result, the work efficiency of attaching the current collector plate 13 to the trolley main material 10 is improved.

(5) In the invention according to claim 3, in the above (1) and (2)
In addition to the effect of (3), the shape of the trolley main material head 12 to be covered with the current collector plate is formed into an H shape having groove portions 12b at both ends in the pin length direction, and the inner surface of the groove portion 12b has the pin length. Since the taper shape is formed so as to come to the pin center line side as it goes to the center part side in the direction, the pin 27 can be supported and bent at three points of the center part and both ends, The spring action can be exerted more effectively, and the pin 27 can be prevented from being sheared.

[Brief description of drawings]

FIG. 1 is an enlarged vertical sectional view of a rigid trolley wire to which the present invention is applied, FIG. 2 is a view taken in the direction of arrow II in FIG. 1, and FIG. 3 is III in FIG.
4 is a perspective view of the rigid trolley wire when disassembled, FIG.
The figure is a partial vertical cross-sectional view showing the difference in the radius of curvature between the current collector plate and the trolley main material in an exaggerated manner. Fig. 6 is a schematic vertical cross-sectional view showing the flexure of the pin in an exaggerated manner. FIG. 8 is an example and is a vertical cross-sectional view of a track for a tire type electric train, and FIGS. 8 and 9 are vertical cross-sectional views of a conventional example. 10 …… Trolly main material, 12b …… Groove, 13 …… Current collector, 14 …… Side wall, 15 …… Pin hole, 16 ……
Pin hole, 17 …… Cylinder nut, 19 …… Bolt, 22 …… Protrusion,
23 …… washer, 24 …… protrusion

Claims (3)

[Claims] 1. A trolley main material, which has a convex cross-section and is made of highly conductive copper, aluminum, or the like, and a current collector plate, which is made of stainless steel or the like and forms a current collecting surface, which has good wear resistance. In the rigid trolley wire provided, the current collector plate is formed into a U-shaped cross-section having both side walls, and is covered on the head of the trolley main material on the current collecting surface side to form both side walls of the trolley main material and the current collector plate. Pin holes for inserting the connecting pins are formed on each side, and the position of the pin holes on the side wall of the current collector plate when the connecting pins are not inserted is slightly smaller on the current collecting surface side than the position of the pin holes of the trolley main material. By eccentricity, the current collector plate is pressed against the trolley main material by the restoring force of the pin when the connecting pin is inserted, and both ends of the above-mentioned connecting pin and both sides of the current collector plate are fixed by the bolt and the nut and washer attached to the bolt. Trying to hold the wall Rigid body trolley line and said. 2. A hollow split pin having a C-shaped cross section is inserted as a connecting pin, and projections are formed on a nut and a washer.
The rigid trolley wire according to claim 1, wherein the projections are inserted into both ends of the split pin. 3. The trolley main material head on which the current collector plate is covered has a cross-sectional shape perpendicular to the trolley main material length direction formed in an H shape having groove portions at both ends in the pin length direction, and the inner surface of the groove portion. The rigid trolley wire according to claim 1, wherein the rigid trolley wire is formed so as to be closer to the center line of the pin in the longitudinal direction of the pin.