JP5550317B2 - Cover mounting bolt retaining structure for a railway vehicle current collector - Google Patents

Description

  The present invention relates to a current collector for a railway vehicle, and more particularly to a current collector having a cover.

  The cover for the railway vehicle current collector is provided on the boat support of the current collector, the intermediate hinge, and the underframe mainly for the purpose of reducing the aerodynamic noise of the current collector for the Shinkansen vehicle. The cover is bolted to the current collector main body. An example of a current collector having a cover is shown in FIG. During maintenance and inspection of the current collector, it is necessary to remove the mounting bolts on the roof of the vehicle and remove the cover, but if the mounting bolts drop off at this time, they will fall into the vehicle from the gap between the roof of the vehicle, Careful attention to the work was required because it was very difficult to recover.

  FIG. 3 shows a first embodiment of a cover mounting bolt retaining structure according to the prior art. After inserting a special bolt with a screw thread only at the tip into the hole in the cover, a retaining bolt with a female screw is screwed in and the bolt does not come out of the cover even if the bolt is loosened.

  FIG. 4 shows a second embodiment of a cover mounting bolt retaining structure according to the prior art. A first embodiment of a cover mounting bolt retaining structure according to the prior art is provided with a bolt removal allowance in the cover.

JP 2005-261655 A

The first embodiment of the cover mounting bolt retaining structure according to the prior art described above can be applied when the cover attaching / detaching direction matches the bolt inserting direction as shown in FIG. If the cover mounting / removal direction shown in Fig. 1 does not match the bolt insertion direction, the remaining bolt will be caught and the cover cannot be removed.

  In the second embodiment of the cover mounting bolt retaining structure according to the prior art described above, as shown in FIG. 4, even when the cover attaching / detaching direction and the bolt inserting direction do not coincide, the bolt removal allowance is provided on the cover side. It is a structure that can be attached and detached without the bolt being caught. The misalignment of the hole due to manufacturing errors between the cover and the mounting female screw can be allowed by the gap between the cover hole and the retaining hole. However, if the cover hole is enlarged, the reliability of the bolt fastening decreases. Moreover, the cost of molding the cover is high, and a structure cannot be added later.

According to the first aspect of the present invention, there is provided a vehicle current collector having a structure in which a cover is bolted to a base frame of a main body, comprising a U-shaped metal fitting having a U-shaped cross section by bending a thin plate, The U-shaped metal fitting is provided with a hole larger than the diameter of the bolt in one of the sides facing each other in the cross section, and the other side facing in the cross section is formed with a female screw that engages with the male screw of the bolt. The lower end portion of the bolt has a mounting hole larger than the nominal diameter of the bolt, and when the cover is fastened to the frame of the main body, the female screw formed on the U-shaped metal fitting is disposed outside the cover. is, and mounted such that the U-shaped bracket to sandwich the lower portion of the cover, the bolt, the U-shaped bracket female screw mounting hole of said cover, said through the large-out, such holes in the U-shaped bracket fastened to the underframe of the body, the body the cover When removed from the base frame, male screw of the bolt also missing from the underframe, and at the same time not placed on the female screw of the male Nejiga該U-shaped bracket of the bolt, the male screw of the bolt A railcar current collector comprising a length.

That is, the railway vehicle current collector of the present invention has a U-shaped metal fitting that has a U-shaped cross section by bending a thin plate. The U-shaped bracket is provided with a hole larger than the diameter of the bolt in one of the sides facing each other in the cross section, and the other side facing in the cross section is formed with a female thread that engages with the male thread of the bolt. The lower end of the cover has a mounting hole larger than the nominal diameter of the bolt. When the cover is fastened to the frame of the main body, the female screw formed on the U-shaped bracket is disposed outside the cover, and the U-shaped bracket is attached so as to sandwich the lower end of the cover. the bolt, the U-shaped bracket female screw mounting holes of the cover, through the large-out, such holes in the U-shaped bracket for fastening to the underframe of the body. When removing the cover from the base frame of the body, as male screw of the bolt also missing from the underframe, which not simultaneously Kakekara the female screw of the male Nejiga該U-shaped bracket of the bolt, It constitutes the length of the male thread of the bolt.

According to the present invention, it is possible to provide a cover for a current collector having an easy and low-cost bolt retaining structure as follows, and to obtain a current collector in which a bolt does not fall off when the cover is attached or detached. it can.
(1) Since the special bolt is screwed into the screw hole of the U-shaped metal fitting and does not come out, and the U-shaped metal fitting cannot be removed from the cover unless the bolt is removed, the bolt can be prevented from coming off. Further, the present invention can also be applied when the bolt insertion direction and the cover attachment / detachment direction do not match.
(2) Since the U-shaped bracket is not fixed to the cover, it is possible to easily adjust the misalignment with the screw hole on the underframe side by moving the position of the U-shaped bracket.
(3) The U-shaped bracket is low in cost because of its simple structure.
(4) A bolt retaining structure can be added later to the cover without a bolt retaining structure by adding the U-shaped bracket and a special bolt.

It is a figure which shows the Example of this invention. FIG. 2 is a detailed view of part A in FIG. 1. It is a figure which shows the 1st Example of the Example of a prior art. It is a figure which shows the 2nd Example of the Example of a prior art. It is explanatory drawing of the example from which the cover attachment / detachment direction and cover attachment direction do not correspond in the 1st Example of the retaining structure of the cover attachment bolt by a prior art. It is a figure which shows the example of the current collector which has a cover.

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a view showing an embodiment of the present invention, and FIG. 2 is an enlarged view of a portion A in FIG.
In the figure, 1 is a cover, 2 is a U-shaped bracket, and 5 is a special bolt.
The cover 1 has a mounting hole having a diameter larger than the nominal diameter of the special bolt 3.
The U-shaped metal fitting 2 has the same width as that of the cover, and has a female screw 3 on one side and a hole 4 larger than the bolt diameter on the same axis.
The length of the male screw of the special bolt 5 is set so that the female screw 3 of the U-shaped bracket 2 and the female screw 7 of the base frame 6 are not hooked at the same time, and the cover 1 is fastened by the screw head of the special bolt 5.

  The U-shaped bracket 2 is inserted into the mounting hole portion of the cover 1 to sandwich the cover 1, but is not fixed and can be moved onto the cover surface. At this time, the female screw 3 provided on the U-shaped metal fitting 2 is arranged outside the cover 1.

  When removing the cover, even if the male screw of the special bolt 5 comes out of the female screw 7 of the base frame 6, it is screwed into the female screw 3 of the U-shaped bracket 2. . Further, since the special bolt 5 cannot be removed from the cover 1, the U-shaped metal fitting 2 just inserted into the cover 1 does not fall off, so that it has a retaining structure.

  The U-shaped metal fitting 2 is in a state of sandwiching the cover 1 but is not fixed. Therefore, the U-shaped fitting 2 can be aligned even if the mounting hole of the cover 1 and the center of the female screw 7 of the base frame 6 are shifted.

  The U-shaped bracket 2 has a structure in which a metal thin plate is bent and a hole is formed, and is low in cost.

  A retaining structure can be obtained by simply adding a U-shaped bracket 2 and a special bolt 5 to the existing cover 1.

It is possible to provide a cover for a current collector having an easy and low-cost bolt retaining structure, which is very useful in industry.
Furthermore, it is possible to obtain a current collector in which the bolt does not fall off when the cover is attached / detached, which can contribute to safety.

DESCRIPTION OF SYMBOLS 1 Cover 2 U-shaped metal fitting 3 Female screw of U-shaped metal fitting 4 Hole of U-shaped metal fitting 5 Special bolt 6 Base frame 7 Female screw of base frame 8 Washer 9 Retaining prevention

Claims (1)

A current collector for a vehicle having a structure in which a cover is bolted to a base frame of a main body, and has a U-shaped metal fitting that has a U-shaped cross section by bending a thin plate. A hole larger than the diameter of the bolt is provided in one of the opposing sides, and a female screw that engages with the male screw of the bolt is formed in the other of the opposing sides in the cross section.
The lower end of the cover has a mounting hole larger than the nominal diameter of the bolt,
When the cover is fastened to the frame of the main body, the female screw formed on the U-shaped bracket is disposed outside the cover, and the U-shaped bracket is attached so as to sandwich the lower end portion of the cover , the bolt, the U-shaped bracket female screw mounting holes of the cover, through the large-out, such holes in the U-shaped bracket is fastened to the underframe of the body,
When removing the cover from the base frame of the body, as male screw of the bolt also missing from the underframe, which not simultaneously Kakekara the female screw of the male Nejiga該U-shaped bracket of the bolt, A railcar current collector comprising the length of the male screw of the bolt.

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