JP2563018Y2 - Lamp unit for traffic signal lights - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to a lamp unit for a traffic signal light for traffic, railway, etc., and particularly to a socket tube detachably mounted on a unit body and a socket tube. The present invention relates to a sealed structure between sockets to be inserted and fixed.

[Conventional technology]

Conventionally, a lamp unit of a traffic signal light installed at a road intersection, a pedestrian crossing, or the like, for example, as shown in FIG. A light source 52 for lighting is carried via 51, and the front surface thereof is covered with a translucent front lens 53 having a filter function of different colors such as blue, orange, and red to form a lamp room 54. , A predetermined signal color is generated.

Further, the socket tube 51 has a flange 56 portion detachably mounted on the rear opening edge 55 of the unit main body 50 to replace the light source 52 and perform other maintenance and inspection work, and the socket tube 51 is provided inside the tube portion 57. A socket 58 is inserted, a tightening band 59 is further wound from the outer periphery, and tightening edges 60 formed at both ends of the tightening band 59 are tightened and fixed by screws (not shown). The light source 52 is screwed and supported to a socket 58 inserted into the cylindrical portion 57 from behind.

[Problems to be solved by the invention]

However, in the socket cylinder 51, since the socket 58 to be inserted into the cylinder portion 57 is made of ceramics, its tolerance must be largely considered, and especially, the winding of the tightening band 59 in the cylinder portion 57. In the case where a slit structure 61 for effectively applying the tightening force of the tightening band 59 is formed in the turning portion, the space between the cylindrical portion 57 and the socket 58 is completely formed in the lamp chamber 54. When the light source 52 is turned on, a respiratory action occurs inside and outside the unit body 50, and the unit body
External dust is sucked into the inside 50 and adheres to the front lens 53 and the reflecting surface 62 formed on the inner surface of the unit main body 50, thereby causing a problem that the performance as a traffic signal light may be reduced or a failure may be caused. Was.

In addition, when performing maintenance and inspection on a traffic signal light installed at a high place near the road side end, an operator inserts a finger from the rear opening edge 55 of the unit body 50 from which the socket tube 51 has been removed to clean the inside. It is not possible to implement the above-mentioned workability in a traffic signal light having a structure in which a member such as an inner lens (not shown) is provided in the light room 54 as recently. It was also a cause to be made.

The present invention has been made in view of the above problems,
Traffic that seals the space between the socket tube and the fitting portion of the socket that is inserted into this socket tube, prevents the occurrence of respiratory action inside the unit body when the light source is turned on, and prevents dust from entering the interior of the lamp chamber. It is an object of the present invention to provide a lamp unit for a signal lamp.

[Means for Solving the Problems] In order to achieve the above object, a lamp unit for a traffic signal light according to the present invention carries a light source through a socket tube at a substantially central portion of the unit body, and has a colored portion in front of the light source. A front lens formed of a light-transmissive material is attached, and a socket in which a light source is mounted is detachably inserted into the socket tube without any gap. A stopper rim for regulating the shape is formed so as to protrude to the inner periphery, and a groove on a ring protruding to the outer periphery of the cylindrical portion of the socket cylinder is formed at a rear portion of the stopper rim, and a groove is formed in the concave groove. The O-ring is inserted, and a fastening band wound around the outer periphery of the cylindrical portion of the socket tube is tightened, so that the O-ring can be pressed against the outer periphery of the socket.

Also, the O-ring is formed with a ring-shaped concave groove on the outer periphery of the socket corresponding to the position behind the stopper edge, the O-ring is inserted into the concave groove, and wound around the outer periphery of the cylindrical portion of the socket cylinder. It is also possible to take measures to fasten the rotated tightening band and press the O-ring against the inner surface of the cylinder when the socket is inserted into the cylinder of the socket cylinder.

[Action]

According to the above configuration, the sealing structure between the fitting portions formed by the O-rings of the socket tube and the socket can be configured inside and near the fixed portion by the tightening band. Even if the slit structure for effectively applying the tightening force of the tightening band is left, the sealing performance can be improved. Therefore, even if the internal pressure of the unit main body changes due to the lighting of the light source, no respiratory action occurs, and the suction of outside air from the fitting portion into the unit main body is prevented.

In addition, according to the structure of the socket tube, it is possible to shift the insertion position of the socket with respect to the socket tube back and forth in accordance with the design change of the type of the socket and the light source, and the focal length of the reflector, and to fix the socket. Become.

Further, the stopper edge formed on the inner surface of the cylindrical portion of the socket tube has a function of preventing the socket from being inserted earlier than a predetermined position in the cylindrical portion, and it is possible to regulate the insertion depth of this socket, The socket can be securely sealed in the cylinder.

〔Example〕

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

FIGS. 1 to 4 show a first embodiment of a lamp unit for a traffic signal light according to the present invention, in which a unit body 1 has a substantially central focal point F position of a reflecting surface 2 formed on the inner surface thereof. A light source 3 for lighting is supported, and a front opening is colored with a predetermined color, and a lamp chamber 6 is formed by being sealed with a front lens 5 made of a translucent material having an appropriate diffusion step 4 formed on the inner surface. An inner lens 7 for appropriately refracting and deflecting the radiated light of the light source 3 into a parallel light flux is interposed between the front lens 5 and the light source 3, and both the front lens 5 and the inner lens 7 are fixed. The edge 8 is integrally fixed to the opening edge 9 of the unit body 1 via the packing 10.

The rear portion of the unit main body 1 is opened in a size that allows the light source 3 to be freely inserted, and a cylindrical opening edge 11 protruding backward is formed around the opening edge. The flange portion 13 of the socket tube 12 is detachably fitted and inserted, and the outer edge of the flange portion 13 is hooked to the end of the opening edge 11 via a packing 14 to fix the two. 15 is
A pair of fixing brackets which stand on the rear surface of the unit main body 1 and hook the flange portion 13 on the opening edge 11 of the unit main body 1.

The light source 3 carried in the lamp chamber 6 of the unit main body 1 via the rear opening edge 11 is structured so as to be screwed and fixed to the socket 17 inserted into the tube portion 16 of the socket tube 12.
On the inner surface of the tube portion 16 of the socket tube 12, a stopper edge 18 for regulating the insertion depth of the socket 17 is formed, and the stopper edge
A sealing structure 19 that seals a fitting portion between the socket 17 and the outer peripheral surface of the socket 17 inserted into the cylindrical portion 16 is formed at the rear portion, that is, outside. In the present embodiment, the sealing structure 19 forms a ring-shaped concave groove 20 protruding to the outer periphery of the cylindrical portion 16 of the socket cylinder 12, and an O-ring 21 is inserted into the concave groove 20. The ring 21 is brought into pressure contact with the outer periphery of the socket 17 inserted into the tube portion 16 of the socket tube 12 to seal the space between the fitting portions.

Reference numeral 22 denotes a tightening band for fixing the socket 17 wound around the cylindrical portion 16 of the socket tube 12 and fitted into the cylindrical portion 16, and formed on both ends of the tightening band 22. Edge 23
Is appropriately tightened with screws 24 or the like to prevent the pull-out. Note that a plurality of slits 25 can be formed in the tube portion 16 of the socket tube 12 to effectively draw out the tightening force of the tightening band 22. Further, a filter (not shown) made of, for example, activated carbon may be attached to a required portion of the unit main body 1 so as to purify the inside air of the unit main body 1 by its respiration.

FIG. 5 shows a second embodiment of the lamp unit for a traffic signal light according to the present invention. Only parts different from the first embodiment will be described. A sealing structure 19 formed between the sockets 17 to be inserted into the portion 16 is formed on the socket 17 side.

That is, a ring-shaped concave groove 20 is formed on the outer periphery of the socket 17, an O-ring 21 is inserted into the concave groove 20, and when the socket 17 is inserted into the cylindrical portion 16 of the socket tube 12, An O-ring 21 is pressed into contact with the inner surface of 16 to hermetically seal a fitting portion between the two. According to the present embodiment, there is no need for special processing on the unit body 1 side, and it can be carried out on a conventional lamp unit, which is convenient and cost-effective.

[Effect of the invention]

Since the traffic signal lamp lamp unit according to the present invention is configured as described above, even if the light source is turned on, respiration does not occur inside and outside the lamp room, so that dust from outside air is not sucked into the lamp room, and the lamp is not lit. The interior surfaces of the interior reflection surfaces, front lenses, inner lenses, and the like are not stained, and maintenance-free operation is realized.

In addition, it is excellent in freedom of installation and versatility according to the scale of the unit main body, it is simple in structure, easy to assemble work and maintenance work, etc., so that cost increase can be prevented. It is excellent in practical effects after implementation of the present invention.

[Brief description of the drawings]

1 is a sectional side view showing a first embodiment of a lamp unit for a traffic signal light according to the present invention, FIG. 2 is a rear view, FIG. 3 is a partially cutaway plan view, and FIG. FIG. 5 is an enlarged side sectional view of a main part of a tube, FIG. 5 is an enlarged side sectional view of a main part showing a second embodiment of the lamp unit for a traffic signal light according to the present invention, and FIG. 6 is a conventional lamp unit for a traffic signal light. It is a side sectional view. DESCRIPTION OF SYMBOLS 1 ... Unit main body, 3 ... Light source 5 ... Front lens, 6 ... Light room 12 ... Socket cylinder, 15 ... Fixing bracket 17 ... Socket, 19 ... Sealed structure 20 ... Groove, 21 ... … O-ring

Claims (2)

(57) [Scope of request for utility model registration] 1. A light source is supported at a substantially central portion of a unit body via a socket tube, and a front lens formed of a colored translucent material is attached in front of the light source, and the light source is mounted on the socket tube. The socket has a structure in which the socket is detachably inserted without any gap, and a stopper edge for restricting the insertion depth of the socket is formed in the cylinder portion of the socket tube so as to protrude toward the inner periphery, and at a rear portion of the stopper edge. Forming a ring-shaped concave groove protruding to the outer periphery of the cylindrical portion of the socket tube, inserting an O-ring into the concave groove, and winding the O-ring around the cylindrical portion of the socket tube and near the concave groove; A lamp unit for a traffic signal light, wherein the O-ring is pressed against the outer periphery of the socket by tightening the tightened band. 2. A light source is supported at a substantially central portion of the unit main body via a socket tube, and a front lens formed of a colored translucent material is attached in front of the light source, and the light source is mounted on the socket tube. And a stopper rim for restricting the insertion depth of the socket is formed in the cylindrical portion of the socket cylinder so as to protrude toward the inner periphery, and a rearward position of the stopper rim. A ring-shaped concave groove is formed on the outer periphery of the socket corresponding to the above, an O-ring is inserted into the concave groove, and a tightening band wound around the outer periphery of the cylindrical portion of the socket cylinder and near the concave groove is formed. A lamp unit for a traffic signal light, wherein the O-ring is pressed against the inner surface of the cylinder when the socket is tightened and the socket is inserted into the cylinder of the socket cylinder.