JP2006008033A - Railway traffic signal - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure a space for maintenance of an LED signal light bulb and to prevent twisting of an external cable even if the external cable is shorter than a predetermined length.
The railway traffic signal is provided with a display unit having an LED signal bulb and a lamp box for storing a plurality of display units. The external cable electrically connected to the LED signal bulb is fixed to the lamp box by a fixing portion attached to the lamp box. The distal end portion of the external cable fixed by the fixing portion is connected to the terminal block. The railway traffic signal is provided with a support plate that supports the terminal block so that the terminal block moves toward and away from the display unit closest to the fixed portion among the plurality of display units. The support plate is attached to the lamp box so as to extend from the vicinity of the fixing part toward the inside of the lamp box, and by rotating about the fixing part of the lamp box about the center of rotation, the terminal block is placed most on the fixing part. Move close to the display unit.
[Selection] Figure 4

Description

  The present invention relates to a railway traffic signal, and more particularly to a railway traffic signal using an LED signal bulb as a light source.

  In recent years, as with road traffic lights, railway traffic lights have been developed using LEDs as light sources. Here, when replacing the filament-type railway traffic light with the LED-type railway traffic light, if the light box of the filament-type railway traffic light can be reused, the construction time and cost can be reduced. LED signal light bulbs that can be attached to a light box of a traffic light have been developed (see, for example, Patent Document 1).

  Here, in the light box of a railway traffic light, a terminal block for connecting a transformer for adjusting the voltage with respect to the LED signal bulb and an external cable connected to an external power source is mounted. The terminal block is fixed to the light box so that it does not get in the way during maintenance work such as periodic inspections and bulb replacement.

  Hereinafter, the fixed position of the terminal block will be described with reference to the railway traffic signal shown in FIGS. 10 and 11. FIG.10 and FIG.11 is a rear view showing the open state in the lamp box of two railway traffic lights with different structures.

First, the common parts of the railway traffic lights 100 and 200 will be described with reference to FIGS. The railway traffic lights 100 and 200 are provided with lamp boxes 110 and 210 in which LED signal light bulbs 101 and 201, transformers 102 and 202, and terminal blocks 103 and 203 are stored.
The lamp boxes 110 and 210 are rotatably attached to lamp box main body portions 111 and 211 for storing the three LED signal light bulbs 101 and 201 along the vertical direction, and one end portions of the lamp box main body portions 111 and 211, respectively. Covers 112 and 212 are provided for opening and closing the back side of the lamp box main body parts 111 and 211.
Fixing portions 113 and 213 for fixing the external cables 104 and 204 are provided at the lower ends of the lamp box main body portions 111 and 211.

Next, the unique part of the railway traffic signal 100 of FIG. 10 will be described.
A support plate 120 that supports the transformer 102 and the terminal block 103 is fixed inside the cover 101 of the railway traffic signal 100. On the support plate 120, the terminal block 103 is disposed at the lowest position, and three transformers 102 corresponding to the respective LED signal light bulbs 101 are disposed above the terminal block 103.
An external cable 104 locked by a wiring clip 121 on the support plate 120 is connected to the input terminal 103 a of the terminal block 103. On the other hand, primary side in-machine wiring 105 from each transformer 102 is connected to the output terminal 103 b of the terminal block 103. Further, each transformer 102 and each LED signal bulb 101 are connected by a secondary-side in-machine wiring 106.

  That is, in the case of the railway traffic signal 100 of FIG. 10, since the terminal block 103 is supported by the support base 103 inside the cover 112, the terminal base 103 is close to the LED signal light bulb 101 when the cover 112 is closed. Although it is located, if the cover 112 is opened, the terminal block 103 is also separated from the LED signal bulb 101 accordingly. Thus, if the terminal block 103 is separated from the LED signal light bulb 101 with the cover 112 opened, the terminal block 103 does not get in the way even during maintenance work, and the work can be performed smoothly.

Further, the unique part of the railway traffic signal 200 of FIG. 11 will be described.
A support plate 220 that supports the transformer 202 and the terminal block 203 is attached to one end of the lamp box main body 211 of the railway traffic signal 200 so as to be rotatable in the same direction as the cover 212. On the support plate 220, the terminal block 203 is disposed at the lowest position, and three transformers 202 corresponding to the respective LED signal light bulbs 201 are disposed above the terminal block 203.
An external cable 204 is connected to the input terminal 203 a of the terminal block 203. On the other hand, primary side in-machine wiring 205 from each transformer 202 is connected to the output terminal 203 b of the terminal block 203. Further, each transformer 202 and each LED signal bulb 201 are connected by a secondary-side in-machine wiring 206.

That is, in the case of the railway traffic signal 200 of FIG. 11, since the terminal block 203 is supported by the support plate 220 that is rotatable with respect to the lamp box main body 211, if the cover 212 is open, the support plate The terminal block 203 can be moved toward and away from the LED signal bulb 201 by rotating 220. Therefore, the terminal block 203 can be separated from the LED signal bulb 201 during maintenance work, and the work can be performed smoothly.
JP 2002-173028 A

  Here, in the case of the railway traffic signals 100 and 200 described above, the terminal blocks 103 and 203 come in contact with and separate from the LED signal light bulbs 101 and 201 as the cover 112 and the support plate 220 are rotated. 203, the length of the external cables 104, 204 from the input terminals 103a, 203a to the fixed portions 113, 213 must be ensured so as not to restrict the movement of the terminal blocks 103, 203. In other words, the external cables 104 and 204 must extend from the fixed portions 113 and 213 by the length described above. However, in the case of a conventional filament-type railway traffic signal, the length may not be satisfied. . In this case, the filament type railway traffic signal cannot be smoothly replaced with the LED type railway traffic signal.

  Further, since the external cables 104 and 204 are fixed by the fixing portions 113 and 213, if the terminal blocks 103 and 203 are moved by the rotation of the cover 112 and the support plate 220, twisting occurs in the axial direction. End up. Since the external cables 104 and 204 have high rigidity, if they are twisted many times, there is a possibility that a force is applied to the portions (external wire crimping terminals) connected to the input terminals 103a and 203a of the terminal blocks 103 and 203 to break them. Increased and undesirable.

  An object of the present invention is to secure a space for maintaining an LED signal light bulb and prevent twisting of the external cable even if the external cable is shorter than a predetermined length.

The railway traffic signal in the invention of claim 1 is:
A display unit having an LED signal bulb;
A light box storing a plurality of the display units;
A fixing part attached to the lamp box to fix an external cable electrically connected to the LED signal bulb to the lamp box;
A terminal block to which a distal end portion of the external cable fixed by the fixing portion is connected;
A support plate for supporting the terminal block so that the terminal block moves toward and away from the display unit closest to the fixed portion of the display units;
The support plate is attached to the lamp box so as to extend from the vicinity of the fixed part toward the inside of the lamp box, and is rotated about the mounting portion of the fixed part in the lamp box as the rotation center. The stage is moved toward and away from the display unit closest to the fixed part.

According to the first aspect of the present invention, when the support plate is rotated about the mounting portion of the fixed portion as a substantial rotation center, the terminal block moves toward and away from the display unit closest to the fixed portion. Although the support plate covers the display unit, a space for maintaining the LED signal bulb is formed between the display unit and the support plate when separated. At the time of this contact / separation movement, the external cable connected to the terminal block bends based on the rotation of the support plate, but the support plate rotates about the mounting portion of the fixed portion as the center of rotation. Directional twisting does not occur, and breakage due to twisting can be prevented.
In addition, since the support plate rotates about the mounting portion of the fixed portion as a substantial rotation center, the moving range of the contact / separation movement can be made shorter than the conventional one. Therefore, even if the external cable is shorter than a predetermined length, it can be connected to the terminal block.

The invention according to claim 2 is the traffic signal for railway according to claim 1,
It is characterized by comprising a restricting portion that engages with the support plate and restricts the movement of the support plate when the display unit closest to the fixed portion and the terminal block approach each other.

  According to the second aspect of the present invention, the restricting portion engages with the support plate to restrict the movement of the support plate, so that the approaching state between the display unit closest to the fixed portion and the terminal block is maintained. be able to.

The invention according to claim 3 is the traffic signal for railway according to claim 1 or 2,
The support plate has an opening for exposing a fixture provided in the display unit when the display unit closest to the fixing portion and the terminal block are approached.

  Here, when the display unit closest to the fixing portion and the terminal block are close to each other, the support plate covers most of the display unit, and the display unit fixing tool is also covered. As described above, if the fixture is covered with the support plate, it is difficult to operate the fixture when approaching, but an opening for exposing the fixture to the support plate is provided as in the invention of claim 3. If so, the fixture can be easily operated through the opening even when approaching.

According to the present invention, the support plate covers the display unit when approaching, but a space for maintaining the LED signal bulb is formed between the display unit and the support plate when separated. At the time of this contact / separation movement, the external cable connected to the terminal block bends based on the rotation of the support plate, but the support plate rotates about the mounting portion of the fixed portion as the center of rotation. Directional twisting does not occur, and breakage due to twisting can be prevented.
In addition, since the support plate rotates about the mounting portion of the fixed portion as a substantial rotation center, the moving range of the contact / separation movement can be made shorter than the conventional one. Therefore, even if the external cable is shorter than a predetermined length, it can be connected to the terminal block.

Hereinafter, embodiments of the present invention will be described. FIG. 1 is a front view of a railway traffic signal according to the present embodiment, FIG. 2 is a rear view, and FIG. 3 is a cross-sectional view. As shown in FIGS. 1 to 3, the railway traffic signal 1 is provided with a lamp box 2 in which each component is stored.
An upper bracket 4 and a lower bracket 5 for fixing the lamp box 2 itself to the column 3 are provided at the upper and lower parts of the lamp box 2. Further, on the front surface of the lamp box 2, three lenses 6 for transmitting light from the inside are arranged along the vertical direction. A visor 7 is provided above each lens 6 to make it easy to see the transmitted light from the lens 6. A back plate 8 that is substantially flush with the lens 6 is provided on the periphery of the lamp box 2, and the back plate 8 is fixed by a back plate stay 81 shown in FIG.

  As shown in FIGS. 2 and 3, the lamp box 2 is provided with a lamp box main body 21 in which each component is stored, and a cover 22 for opening and closing the rear part of the lamp box main body 21. Note that FIG. 2 shows the time when the cover 22 is opened, and FIG. 3 shows the time when the cover 22 is closed.

  The lamp box main body 21 is formed in a substantially quadrangular prism shape, and an opening 23 is provided on the back side. Each component is attached to the inside of the lamp box main body 21 through the opening 23. Each component is connected to three display units 10 having LED signal bulbs having different emission colors, a transformer 11 for adjusting a voltage for the LED signal bulb, and an external cable 30 connected to an external power source. There are a base 12, a support plate 13 for supporting the terminal base 12, a fixing portion 31 for fixing the external cable 30, and the like.

  In the display unit 10, in addition to the LED signal bulb, a circuit board for emitting the LED signal bulb, a casing for integrating the circuit board and the LED signal bulb, and a casing are fixed to the lamp box main body 21. For example, a fixing tool 14 such as a screw is provided. The display unit 10 is attached to the inside of the lamp box main body 21 with the three fixtures 14 so that the LED signal bulb faces the inner surface of the lens 6.

  The transformer 11 is installed between the display units 10. Specifically, a transformer 11 for the LED signal bulb of the top display unit 10 is disposed between the top display unit 10 and the middle display unit 10, and the top display unit 10 and the top display unit 10 are connected to the top display unit 10. Between the lower display units 10, two transformers 11 for the LED signal bulbs of the middle and lowest display units 10 are arranged.

  The front end portion of the external cable 30 is connected to the input terminal 12a of the terminal block 12, and the primary in-machine wiring 18 from each transformer 11 is connected to the output terminal 12b. Further, each transformer 11 and each display unit 10 are connected by a secondary-side in-machine wiring 19. Thereby, the LED signal bulb of the display unit 10 and the external cable 30 are electrically connected.

  The fixing portion 31 is installed at the lower end portion of the lamp box main body portion 21 and fixes the external cable 30 that has entered from the through hole on the lower surface of the lamp box main body portion 21. A support plate 13 is attached to the lower end portion of the lamp box main body 21 so as to extend from the vicinity of the fixed portion 31 toward the inside of the lamp box main body 21. The support plate 13 is configured to rotate about the attachment portion of the fixing portion 31 in the lamp box main body 21 as a substantial rotation center.

  Hereinafter, the support plate 13 will be described in detail. 4A and 4B are explanatory views showing a schematic configuration of the support plate. FIG. 4A is a rear view, and FIG. 4B is a side view. As shown in FIG. 4, a terminal block 12 is fixed to the upper rear surface of the support plate 13 with the input terminal 12a positioned downward and the output terminal 12b positioned upward. Further, a first opening 32 is provided at the center lower portion of the support plate 13. The distal end portion of the external cable 30 fixed by the fixing portion 31 is connected to the input terminal 12 a of the terminal block 12 through the first opening 32. A second opening 33 smaller than the first opening 32 is also formed on both sides of the first opening 32. The both end portions of the support plate 13 are bent toward the front side (the back side in FIG. 4A), leaving the vicinity of the upper portion. A long hole 35 is formed below the bent portion 34 along the vertical direction. On the other hand, in the upper part of both ends of the support plate 13 that is not bent, a dharma hole 36 is formed whose upper part is narrower than the lower part.

  2 and 4, a plate-like base 40 for rotatably holding the support plate 13 is attached to the lower portion of the lamp box main body 21. Both end portions 41 of the base 40 are bent upward so as to face the bent portion 34 of the support plate 13. The both end portions 41 are provided with shaft members 42 that pass through the long holes 35 of the bent portion 34 and serve as the rotation shaft of the support plate 13. In addition, a restriction screw 43 that engages with the dull hole 36 of the support plate 13 and restricts the rotation of the support plate 13 is provided above both ends 41 of the base 40 in the lamp box main body 21. The outer diameter of the screw head of the restriction screw 43 is set to a size that does not pass through the upper part of the dharma hole 36 but passes through the lower part.

  Further, a cover stay 50 bent in a substantially U-shape is provided on the back side of the support plate 13 in the base 40 (on the front side in FIG. 4A) to restrict the movement of the cover 22. . FIG. 5 is a top view showing the internal structure of the railway traffic signal 1. As shown in FIGS. 5 and 4, the base 40 is formed with a pair of insertion holes 44 and 45 through which both ends of the cover stay 50 are inserted. One end portion of the cover stay 50 is inserted into an insertion hole 44 located on the rotating shaft side of the cover 22 so as to be rotatable, and the other end portion is inserted into the other insertion hole 45. Here, a fastener 51 is provided at one end of the cover stay 50 so that the cover stay 50 does not come out of the insertion hole 44 even if the cover stay 50 swings in the vertical direction. The other end of the cover stay 50 is set to have a length that allows the cover stay 50 to come out from the insertion hole 45 when the cover stay 50 is positioned at the uppermost position by contact between the fastener 51 and the base 40. As a result, the cover stay 50 can rotate about the insertion hole 44. Further, as shown in FIG. 5, the cover 22 is also formed with an insertion hole 25 through which the other end of the cover stay 50 is inserted, and the other end of the cover stay 50 is inserted into the insertion hole 25. In this case, the movement of the cover 22 is restricted.

Next, the operation of this embodiment will be described.
First, during normal operation of the railway traffic signal 1, the cover 22 is closed as shown in FIG. When the maintenance of the display unit 10 is reached, the operator opens the cover 22 and then moves the cover stay 50 upward to extract the other end of the cover stay 50 from the insertion hole 45. Then, the operator rotates the cover stay 50 and moves the cover stay 50 downward so that the other end of the cover stay 50 is inserted into the insertion hole 25 of the cover 22. Thereby, the movement of the cover 22 is regulated.

When the cover 22 is opened, the back surfaces of the uppermost and middle display units 10 are exposed as shown in FIG. 2, but only the lowermost display unit 10 is covered by the support plate 13. It has been broken. In this state, since the maintenance of the lowest display unit 10 cannot be performed, the operator moves the support plate 13 to secure a space necessary for the maintenance.
Here, among the three fixtures 14 of the lowest display unit 10, the fixture 14 positioned above is not covered because it is above the upper end of the support plate 13, and the remaining two fixtures 14 are not covered. The fixture 14 is not covered because it faces the second opening 33 of the support plate 13. That is, even if the support plate 13 covers the lowest display unit 10, the three fixtures 14 included in the display unit 10 are exposed. As described above, if the fixture 14 is exposed, the support plate 13 can be moved after the fixture 14 is loosened in advance before a space necessary for maintenance is secured.

Hereinafter, the movement of the support plate 13 will be described with reference to FIGS. 4 and 6 to 8.
When the cover 22 is immediately after opening, as shown in FIG. 4, the screw head of the restriction screw 43 is located above the Dharma hole 36, and the rotation of the support plate 13 is restricted. The upper end of the support plate 13 at this time is indicated by a reference line S in FIGS. As shown in FIG. 6, the operator lifts the support plate 13 to a position where the lower portion of the Dalma hole 36 and the screw head of the regulating screw 43 face each other. Then, the operator pulls the upper portion of the support plate 13 toward the front (rear side) so that the screw head of the restriction screw 43 passes through the dharma hole 36. As a result, the support plate 13 is separated from the lowest display unit 10 while rotating about the shaft member 42 as the rotation center. In FIG. 7, the two-dot chain line portion C represents the support plate 13 approaching the lowest display unit 10, and the solid line portion D represents the rotating support plate 13. If the support plate 13 is tilted to the back side, a space for maintenance is secured on the back side of the lowest display unit 10.

Here, as shown in FIG. 8, the external cable 30 connected to the terminal block 12 bends from the fixed portion 31 to the back side with the rotation of the support plate 13, but does not twist in the axial direction. become. Thereafter, the operator loosens the fixture 14 and removes the display unit 10 from the lamp box main body 21. Here, in this embodiment, the fixture 14 is a screw attached to the lamp box main body 21, and the display unit 10 is formed with a dharma hole (not shown) that engages with the fixture 14 along the circumferential direction. Has been. That is, after loosening the fixture 14, the display unit 10 can be removed from the lamp box main body 21 by rotating the display unit 10 and moving it from the dharma hole to a position where the screw head of the fixture 14 can pass. It becomes possible. After removal, the operator performs maintenance operations such as replacement and inspection of the LED signal bulb.
When the maintenance is completed, the operator attaches the display unit 10 to the lamp box main body 21, and then the screw head of the regulation screw 43 passes through the dharma hole 36 of the support plate 13 as indicated by a two-dot chain line portion C in FIG. 7. Until this is done, the support plate 13 is rotated toward the front side. Thereafter, when the operator releases his / her hand from the support plate 13, the support plate 13 falls by its own weight until the screw head of the restriction screw 43 is positioned above the Dharma hole 36, and the rotation of the support plate 13 is restricted. .

  Thereafter, the operator moves the cover stay 50 upward so that the other end of the cover stay 50 comes out of the insertion hole 25 of the cover 22. Then, the operator rotates the cover stay 50 and moves the cover stay 50 downward so that the other end of the cover stay 50 becomes the insertion hole 45 of the base 40. Thereby, since the movement of the cover 22 becomes possible, the operator closes the cover 22.

As described above, according to the railway traffic signal 1 of the present embodiment, if the support plate 13 rotates about the attachment portion of the fixing portion 31 as a substantial rotation center, the terminal block 12 is relative to the lowest display unit 10. Since the support plate 13 covers the display unit 10 when approaching, the space for maintaining the LED signal bulb is formed between the display unit 10 and the support plate 13 when separated. become. At the time of this contact / separation movement, the external cable 30 connected to the terminal block 12 bends based on the rotation of the support plate 13, but the support plate 13 rotates about the mounting portion of the fixed portion 31. The outer cable 30 is not twisted in the axial direction and can be prevented from being broken by twisting.
In addition, since the support plate 13 rotates about the attachment portion of the fixed portion 31 as a substantial rotation center, the moving range of the contact / separation movement can be made shorter than the conventional one. Therefore, even if the external cable 30 is shorter than the predetermined length, it can be connected to the terminal block 12.

  Further, when the lowermost display unit 10 and the terminal block 12 are approached, the movement of the support plate 13 is restricted by the restriction screw 43 engaging with the support plate 13 through the Dalma hole 36. That is, since the restriction screw 43 is a restriction portion according to the present invention, the approaching state between the lowest display unit 10 and the terminal block 12 can be maintained.

It is needless to say that the present invention is not limited to the above embodiment and can be modified as appropriate.
For example, in the present embodiment, the case where the external cable 30 enters the inside of the lamp box main body 21 from below the lowest display unit 10 is illustrated, so the fixing unit 31 is also arranged below the lowest display unit 10. However, the positions where the external cable 30 enters the interior of the lamp box main body 21 are other than this, the side of the lowermost, middle, uppermost display unit 10, the upper side of the uppermost display unit 10, etc. There is. For this reason, although the fixing | fixed part 31 and the support plate 13 are installed according to the approach position, the possibility that the display unit 10 nearest to the fixing | fixed part 31 will be covered with the support plate 13 is high. However, regardless of the location, the support plate 13 rotates about the mounting portion of the fixing portion 31 as a substantial center of rotation, and the terminal block 12 is moved toward and away from the display unit 10 closest to the fixing portion. Since it is moved, the space required for maintenance can be secured.

  Further, as shown in FIG. 5, the base 40 has a pair of auxiliary insertion holes 46, 47 of the same size at the same interval as the pair of insertion holes 44, 45 (A = B in FIG. 5). It is formed so as to be farther from the rotation axis of the cover 22 than the insertion holes 44 and 45. Here, the railway traffic signal 1 may be given a predetermined restriction depending on the installation location. For example, if it is a place where there is not enough space between the tracks, the back plate 8 on the side (right side in the drawing) on which the space cannot be taken must be omitted as shown in FIG. Further, since it is not preferable to project the cover 22 to the side where the interval cannot be taken, it is necessary to set the restriction position of the cover 22 to the inner side than in the case of FIG. That is, when the railway traffic signal 1 is installed, the operator determines whether or not it is a place that cannot be spaced from the rotating shaft side of the cover 22, and if it is a place that can be spaced, as described above. The cover stay 50 is attached to one insertion hole 44 of the pair of communication holes 44 and 45. In the case where the interval is not possible, the cover stay 50 is attached to one of the pair of auxiliary insertion holes 46, 47. As a result, the rotation axis of the cover stay 50 is further away from the rotation axis of the cover 22 than the insertion hole 44. Therefore, if the cover stay 50 is engaged with the insertion hole 25 of the cover 22, the cover 22 is more than the case of FIG. Can be prevented.

It is a front view showing the schematic structure of the traffic signal for railway signals in this embodiment. FIG. 2 is a rear view illustrating a schematic configuration of the railway traffic signal of FIG. 1. FIG. 2 is a cross-sectional view illustrating a schematic configuration of the railway traffic signal of FIG. 1. It is explanatory drawing showing schematic structure of the support plate with which the traffic signal of FIG. 1 is equipped. It is an upper view showing the internal structure of the railway traffic signal of FIG. It is explanatory drawing for demonstrating operation | movement of the support plate of FIG. It is explanatory drawing for demonstrating operation | movement of the support plate of FIG. It is explanatory drawing for demonstrating operation | movement of the support plate of FIG. It is an upper view showing the modification of the traffic signal for railways of FIG. It is a rear view showing an example of the conventional railway traffic signal. It is a rear view showing an example of the conventional railway traffic signal.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Railway signal device 2 Light box 10 Display unit 12 Terminal block 13 Support plate 30 External cable 31 Fixed part 33 2nd opening (opening)
43 Regulatory screw (Regulatory part)

Claims (3)

A display unit having an LED signal bulb;
A light box storing a plurality of the display units;
A fixing part attached to the lamp box to fix an external cable electrically connected to the LED signal bulb to the lamp box;
A terminal block to which a distal end portion of the external cable fixed by the fixing portion is connected;
A support plate for supporting the terminal block so that the terminal block moves toward and away from the display unit closest to the fixed portion of the display units;
The support plate is attached to the lamp box so as to extend from the vicinity of the fixed part toward the inside of the lamp box, and rotates around the mounting portion of the fixed part in the lamp box as the rotation center. A railway traffic signal characterized in that a platform is moved toward and away from the display unit closest to the fixed part. The railway traffic signal according to claim 1,
A railway traffic signal, comprising: a restricting portion that engages with the support plate and restricts the movement of the support plate when the display unit closest to the fixing portion approaches the terminal block. In the railway traffic signal according to claim 1 or 2,
The railroad traffic signal according to claim 1, wherein the support plate has an opening for exposing a fixture provided in the display unit when the display unit closest to the fixing portion and the terminal block are approached.

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