JP7752326B2 - street lights - Google Patents

Description

The present invention relates to street lights.

Patent Document 1 discloses a structure for preventing roadway lighting fixtures from falling. The fall prevention structure disclosed in Patent Document 1 comprises a lighting fixture (lamp), a support pole, a V-shaped fastener inserted into the support pole, and a wire connected to the top of the V-shaped fastener and the other end connected to the lighting fixture. The V-shaped fastener is locked into the inside of the support pole, preventing the lighting fixture connected to the V-shaped fastener via the wire from falling.

Utility Model Registration No. 3122504

However, depending on the direction and magnitude of the force applied, the V-shaped fasteners may fall off. In this case, it is not possible to prevent the lighting fixture from falling.

The present invention aims to provide a street light that reduces the possibility of the lighting fixture falling.

A street light according to one aspect of the present invention comprises a pole having an opening at its tip and a hollow space communicating with the opening; a lighting fixture attached to the tip; a wire having one end connected to the lighting fixture and at least the other end located within the hollow space; a rigid first member located within the hollow space; and a second member attached to the other end of the wire and holding the wire and the first member in a state where they can move independently of each other. The pole has a restricting portion located closer to the opening than at least a portion of the first member within the hollow space and restricting the at least a portion of the first member from reaching the opening.

A street light according to another aspect of the present invention comprises a pole having an opening at its tip and a hollow space communicating with the opening; a lighting fixture attached to the tip; a wire having one end connected to the lighting fixture and at least the other end located within the hollow space; a first member located within the hollow space; and a second member attached to the other end of the wire and holding the wire and the first member in a state where they can move independently of each other. The pole comprises a first pole section and a second pole section connected to the first pole section and having the opening and at least a portion of the hollow space. The second pole section is located closer to the opening than at least a portion of the first member within the hollow space and has a restricting section that restricts the at least a portion of the first member from reaching the opening.

A street light according to another aspect of the present invention comprises a pole having an opening at its tip and a hollow space communicating with the opening; a lighting fixture attached to the tip; a wire having one end connected to the lighting fixture and at least the other end located within the hollow space; a first member located within the hollow space; and a second member attached to the other end of the wire and holding the wire and the first member in a state where they can move independently of each other. The pole comprises a first pole section and a second pole section connected to the first pole section and having the opening and at least a portion of the hollow space. The first pole section is located closer to the opening than at least a portion of the first member within the hollow space and has a restricting section that restricts the at least a portion of the first member from reaching the opening.

The street light of the present invention can further reduce the possibility of the lighting fixture falling.

FIG. 1 is a schematic side view of a street light according to an embodiment. FIG. 2 is a side view showing a state in which the lighting fixture of the street light according to the embodiment has been removed and lifted up. FIG. 3 is a diagram showing the connection between the wire and the fall prevention fitting in the street light according to the embodiment. FIG. 4 is a perspective view of a fall prevention fitting in a street light according to the embodiment. FIG. 5 is a diagram for explaining the function of the fall prevention fittings in the street light according to the embodiment. FIG. 6 is a diagram showing the state of the fall prevention fitting when the lighting fixture in the street light according to the embodiment comes off. FIG. 7 is a diagram showing a fall prevention fitting in a street light according to the first modification. FIG. 8 is a diagram showing the state of the fall prevention fitting when the lighting fixture in the street light according to the second modification comes off. FIG. 9 is a diagram for explaining the function of the fall prevention fitting in the street light according to the third modification. FIG. 10 is a diagram for explaining the function of the fall prevention fitting in the street light according to the fourth modification. FIG. 11 is a diagram for explaining the function of the fall prevention fitting in the street light according to the fifth modification.

The following describes in detail street lights according to embodiments of the present invention, using the drawings. Note that each of the embodiments described below represents a specific example of the present invention. Therefore, the numerical values, shapes, materials, components, component arrangement and connection forms, steps, and step order shown in the following embodiments are merely examples and are not intended to limit the present invention. Therefore, among the components in the following embodiments, components that are not recited in the independent claims will be described as optional components.

Furthermore, each figure is a schematic diagram and is not necessarily an exact illustration. Therefore, for example, the scales of the figures do not necessarily match. Furthermore, in each figure, substantially identical components are assigned the same reference numerals, and redundant explanations are omitted or simplified.

In addition, in this specification, terms indicating the shape of elements such as cylinders and prisms, as well as numerical ranges, are not expressions that express only the strict meaning, but also expressions that include a substantially equivalent range, for example, a difference of about a few percent.

In addition, in this specification, the "one end" and "other end" of a wire or rod portion do not strictly refer to the ends of the wire or rod portion. In other words, "one end" of a wire does not only mean the tip portion on one side of the wire, but also includes the area surrounding the tip portion. The same applies to the "other end." The area surrounding the tip portion is, for example, approximately 1/4 of the total length of the wire.

In addition, in this specification, ordinal numbers such as "first" and "second" do not refer to the number or order of components, unless otherwise specified, but are used to avoid confusion and distinguish between components of the same type.

(Embodiment)
[composition]
First, the configuration of a street light according to an embodiment will be described with reference to FIGS. 1 to 5. FIG.

Figure 1 is a schematic side view of a street light 1 according to this embodiment. Figure 2 is a side view showing the street light 1 according to this embodiment with the lighting fixture 20 removed and lifted up. Figure 3 is a diagram showing the connection between the wire 30 and the fall prevention fitting 40 in the street light 1 according to this embodiment. Figure 4 is a perspective view of the fall prevention fitting 40 in the street light 1 according to this embodiment. Figure 5 is a diagram explaining the function of the fall prevention fitting 40 in the street light 1 according to this embodiment.

The street light 1 according to this embodiment is a lighting device that is installed on the ground, such as on a road, walkway, parking lot, plaza, or park, or on a structure such as a bridge, elevated road, or building, and illuminates the area below (the ground). As shown in FIG. 1, the street light 1 includes a pole 10, a lighting fixture 20, and a functional module 60.

The pole 10 is erected on the ground so as to extend vertically upward. The height of the pole 10 is, for example, several meters to several dozen meters. The pole 10 is a columnar body with at least a portion of its interior being hollow. Specifically, as shown in Figure 5, the pole 10 has an opening 121 at its tip and a hollow space 120 that communicates with the opening 121. The pole 10 also has a restricting portion 122. Note that Figure 5 shows a cross section of the pole 10 (second pole portion 12) taken along the central axis. The components other than the pole 10 are shown as viewed from the side.

In this embodiment, as shown in FIG. 2, the pole 10 comprises a first pole portion 11 and a second pole portion 12. The second pole portion 12 is located closer to the tip than the first pole portion 11. In other words, the second pole portion 12 has an opening 121 and at least a portion of a hollow space 120. The hollow space 120 is provided from the second pole portion 12 to the first pole portion 11.

The first pole portion 11 is, for example, a support pole portion fixed to the ground. The first pole portion 11 is a cylindrical body (e.g., a cylinder) with at least a portion of its interior hollow, but is not limited to this. The first pole portion 11 may also be a prismatic body (e.g., a rectangular cylinder) with at least a portion of its interior hollow. The first pole portion 11 may also have a shape that tapers from the lower end (rear end) to the upper end (tip end). The first pole portion 11 may be arranged to extend diagonally upward relative to the ground or installation surface. The first pole portion 11 is made of metal, but may also be made of resin.

The second pole section 12 is a detachable adapter pole section for attaching a functional module 60 to the tip of the first pole section 11. The functional module 60 is a module that has one or more functions. The one or more functions include, for example, at least one of a communication function, a sensor function, or a function related to the control or installation of the lighting fixture 20.

The communication function is, for example, a function for wireless communication. The sensor function is, for example, a function for detecting environmental values of the environment surrounding the pole 10. Environmental values include, for example, temperature, wind speed, humidity, water flow rate, and air quality. Alternatively, the sensor function may be a function for detecting the state of the pole 10. The state of the pole 10 includes, for example, electrical resistance and distortion. The sensor function may also be a function for detecting acceleration applied to the functional module 60. Based on the acceleration, shaking caused by an earthquake or typhoon can be detected. Alternatively, the sensor function may be a function for detecting the movement of a person or object. For example, the sensor function may be a function for acquiring images using infrared rays or radio waves. The functions possessed by the functional module 60 may also include a calculation function for executing a program that processes data or information obtained by each function. Alternatively, the function related to the control or installation of the lighting fixture 20 includes at least one of a function for turning the lighting fixture 20 on or off, a function for adjusting the direction and posture of the lighting fixture 20, and a function for installing or expanding the lighting fixture 20. For example, the functional module 60 may be at least one of a wireless communication device, a surveillance camera, a control device, and a computing device, but is not limited to these.

The second pole part 12 is inserted into the tip of the first pole part 11 and fixed with a screw or the like. The second pole part 12 is, for example, a cylindrical body made of metal, but is not limited to this. The second pole part 12 may also be made of resin or may be a cylindrical body.

Although not shown, the second pole part 12 is provided with a fall prevention mechanism to prevent it from falling off the first pole part 11. The fall prevention mechanism is, for example, a wire connecting the first pole part 11 and the second pole part 12. If the screw securing the first pole part 11 and the second pole part 12 to each other comes loose and the second pole part 12 detaches from the tip of the first pole part 11, the wire prevents the second pole part 12 from falling off.

The lighting fixture 20 is attached to the tip (upper end) of the pole 10. In this embodiment, the lighting fixture 20 is attached so as to cover the opening 121 of the second pole section 12 and is fixed with screws or the like. The lighting fixture 20 is a lighting fixture that includes a light-emitting element such as an LED (Light Emitting Diode). The shape and size of the lighting fixture 20 are not particularly limited.

In this embodiment, the street light 1 is equipped with a fall prevention mechanism to prevent the lighting fixture 20 from falling. Specifically, as shown in Figure 2, the street light 1 is equipped with a wire 30, a fall prevention fitting 40, and a connecting fitting 50. Note that Figure 2 shows the lighting fixture 20 lifted above the pole 10, but when the lighting fixture 20 is attached to the tip of the pole 10, the wire 30, fall prevention fitting 40, and connecting fitting 50 are all located within the hollow space 120 inside the pole 10 (see Figure 5).

One end of the wire 30 is connected to the lighting fixture 20, and at least the other end is located within the hollow space 120. As shown in Figure 3, an insertion hole 30a is provided at the other end of the wire 30. A connector 50 is inserted into the insertion hole 30a.

The connection between the wire 30 and the lamp 20 is not particularly limited. For example, the wire 30 may be screwed to the lamp 20 using a hole provided at one end of the wire 30, or the wire 30 and lamp 20 may be welded together. The wire 30 is made of metal, for example, but may also be made of resin.

The fall prevention bracket 40 is an example of a rigid first member, and is located within the hollow space 120. "Rigidity" means that it will not deform even when a predetermined force is applied. Specifically, "rigidity" means that it will not deform even when a force of more than twice the weight of the lighting fixture 20 is applied.

As shown in FIG. 4, the fall prevention bracket 40 has a rod portion 41 and a plate portion 42. The rod portion 41 and the plate portion 42 are each made of metal and are integrally constructed. For example, the rod portion 41 and the plate portion 42 are fixed by welding.

The rod portion 41 has its tip (one end) held by the connecting fitting 50 and its rear end (the other end) connected to the plate portion 42. An insertion hole 41a is provided at the tip of the rod portion 41.

The plate portion 42 is a rigid, disc-shaped metal plate. As shown in FIG. 5, the plate portion 42 is located within the hollow space 120 at a position farther from the opening 121 than the restricting portion 122 (specifically, lower than the restricting portion 122). The plate portion 42 has approximately the same cross-sectional shape as the hollow space 120 perpendicular to the axial direction of the pole 10, but is slightly smaller in size. Note that "slightly smaller" is, for example, approximately 1% to 10%, but is not limited to this.

A through-hole 42a is provided in the center of the plate portion 42. The through-hole 42a is a hole through which wiring for supplying power to the lighting fixture 20 is inserted. Note that the through-hole 42a may have a shape cut out from the end face of the plate portion 42. In other words, the plate portion 42 may be formed in a C-shape rather than a circular ring shape.

The connecting fitting 50 is an example of a second member, and holds the wire 30 and the fall prevention fitting 40 in a state where they can move independently of each other. The connecting fitting 50 is a metal, annular fastener known as a carabiner. As shown in Figure 3, the connecting fitting 50 has an opening/closing part 51 that opens and closes the ring. With the opening/closing part 51 open, the connecting fitting 50 is passed through the insertion hole 30a of the wire 30 and the insertion hole 41a of the fall prevention fitting 40, and then the opening/closing part 51 is closed. The opening/closing part 51 is, for example, a screw-type opening/closing part, but it may also be a spring-type opening/closing part.

This allows the wire 30 and fall prevention fitting 40 to be held in a state where they can move freely along the ring of the connecting fitting 50. This prevents force from being directly transmitted between the wire 30 and fall prevention fitting 40, reducing the possibility of the wire 30 and fall prevention fitting 40 becoming disconnected even if a large force is applied to the wire 30.

[Fall prevention mechanism]
Next, the specific operation of the fall prevention mechanism for the lighting fixture 20 provided in the street light 1 will be described with reference to Figures 5 and 6. Figure 6 is a diagram showing the state of the fall prevention fitting 40 when the lighting fixture 20 in the street light 1 according to this embodiment becomes detached.

In the case where the lighting fixture 20 detaches from the tip of the pole 10 and attempts to fall, the street light 1 according to this embodiment is configured so that the fall prevention fitting 40 does not protrude from the opening 121 at the tip of the pole 10. Specifically, as shown in Figure 5, a restricting portion 122 is provided inside the pole 10 to which a portion of the fall prevention fitting 40 (specifically, the plate portion 42) is engaged.

The restricting portion 122 is located within the hollow space 120 closer to the opening 121 than at least a portion of the fall-prevention fitting 40. Specifically, the restricting portion 122 is located closer to the opening 121 than the plate portion 42 of the fall-prevention fitting 40. The restricting portion 122 prevents the plate portion 42 of the fall-prevention fitting 40 from reaching the opening 121.

In this embodiment, the restricting portion 122 is a protrusion that protrudes from the inner surface of the second pole portion 12. The restricting portion 122 is provided, for example, in a circular ring shape. In the area where the restricting portion 122 is provided, the cross-sectional area of the hollow space 120 in a cross section perpendicular to the axial direction of the second pole portion 12 is smaller than the cross-sectional area of the area where the restricting portion 122 is not provided (for example, the opening area of the opening 121). Therefore, the rigid plate portion 42 is engaged with the restricting portion 122 and cannot move beyond the restricting portion 122.

For this reason, even if the fall prevention fitting 40 is inserted through the opening 121, it will not exceed the restricting portion 122. In this embodiment, the fall prevention fitting 40 is inserted into the hollow space 120 inside the pole 10 from the lower end side. For example, the fall prevention fitting 40 is inserted from the opening on the lower end side of the second pole portion 12.

When the lighting fixture 20 comes off the tip of the pole 10, the lighting fixture 20 will normally attempt to fall downward. As a result, a downward pulling force is applied to the wire 30 connected to the lighting fixture 20, as shown by the white arrow in Figure 6. Because the fall prevention fitting 40 is connected to the wire 30 via the connecting fitting 50, the tension applied to the wire 30 pulls the rod portion 41 of the fall prevention fitting 40 upward, causing the fall prevention fitting 40 to attempt to move toward the opening 121.

However, even if the rod portion 41 is pulled upward, the plate portion 42 is locked by the restricting portion 122, so the plate portion 42 does not reach the opening 121. In other words, at least a portion of the fall prevention fitting 40 does not reach the opening 121, and the fall prevention fitting 40 does not protrude from the opening 121. This prevents the lamp 20 connected to the fall prevention fitting 40 via the wire 30 from falling.

In this embodiment, as shown in FIG. 6, when the lighting fixture 20 is detached and the plate portion 42 is engaged with the restricting portion 122, the tip of the rod portion 41 is located outside the pole 10. In other words, the tip of the rod portion 41 protrudes from the opening 121, and the connecting fitting 50 and wire 30 are also located outside the pole 10.

The tip of the rod portion 41 contacts the edge of the opening 121 of the pole 10, and part of the force pulling the wire 30 downward is applied to the tip of the rod portion 41. As a result, the wire 30 is no longer in contact with the edge of the opening 121 of the pole 10, and shear forces acting on the wire 30 can be reduced. This makes the wire 30 less likely to be cut, further reducing the possibility of the lighting fixture 20 falling.

Another advantage is that, because the tip of the rod portion 41 is located outside the pole 10, it becomes easier to attach the connector fitting 50 to the rod portion 41. The tip of the rod portion 41 may not be located outside the pole 10, but may be located on the opening surface of the opening 121. In this case, the same effect can be achieved as when the tip is located outside the pole 10.

Furthermore, in this embodiment, because the pole 10 can be separated into the first pole portion 11 and the second pole portion 12, there is a possibility that the lighting fixture 20 may fall together with the second pole portion 12. That is, the second pole portion 12 may become detached from the first pole portion 11. As described above, a fall prevention mechanism (e.g., a wire, not shown) is provided between the second pole portion 12 and the first pole portion 11 to prevent the second pole portion 12 from falling. Therefore, even if the second pole portion 12 becomes detached from the first pole portion 11, the wire will prevent it from falling.

While the second pole portion 12 is prevented from falling, it is possible for the second pole portion 12 to be turned upside down, causing the opening 121 at the tip of the second pole portion 12 to face downward, and the lighting fixture 20 to detach from the tip of the second pole portion 12. Even if the opening 121 faces downward and the lighting fixture 20 detaches, the plate portion 42 of the fall prevention bracket 40 will engage with the restricting portion 122. Because the plate portion 42 is rigid and does not deform, it will not exceed the restricting portion 122, preventing the lighting fixture 20 from falling.

[Effects, etc.]
As described above, the street light 1 according to this embodiment comprises a pole 10 having an opening 121 at its tip and a hollow space 120 communicating with the opening 121, a lighting fixture 20 attached to the tip, a wire 30 having one end connected to the lighting fixture 20 and at least the other end located within the hollow space 120, a rigid fall-prevention fitting 40 located within the hollow space 120, and a connecting fitting 50 attached to the other end of the wire 30 and holding the wire 30 and the fall-prevention fitting 40 in a state where they can move independently of each other. The pole 10 has a restricting portion 122 located closer to the opening 121 than at least a portion of the fall-prevention fitting 40 within the hollow space 120, and restricting at least a portion of the fall-prevention fitting 40 from reaching the opening 121.

For example, in the fall prevention mechanism disclosed in Patent Document 1, the V-shaped fastener is elastically deformable, so depending on the strength and direction of the force applied to the V-shaped fastener, it may not be able to lock into place inside the support post and may fall off. In this case, it is not possible to prevent the lighting fixture (lamp) from falling.

In contrast, in the street light 1 according to this embodiment, the fall prevention fitting 40 is rigid, so at least a portion of the fall prevention fitting 40 does not extend beyond the restricting portion 122 and does not reach the opening 121. This prevents the fall prevention fitting 40 from detaching from the pole 10, reducing the possibility of the lighting fixture 20 connected to the fall prevention fitting 40 falling.

In addition, because the wire 30 and fall-prevention fitting 40 are held in a state where they can move independently of each other via the connecting fitting 50, it is possible to prevent force from being directly transmitted between the wire 30 and the fall-prevention fitting 40. This reduces the possibility of the wire 30 and fall-prevention fitting 40 becoming disconnected even if a large force is applied to the wire 30. This further reduces the possibility of the lighting fixture 20 falling.

The pole 10 includes, for example, a pole having an opening 121 at its tip and a hollow space 120 communicating with the opening 121; a lighting fixture 20 attached to the tip; a wire 30 connected at one end to the lighting fixture 20 and at least the other end located within the hollow space 120; a fall prevention fitting 40 located within the hollow space 120; and a connecting fitting 50 attached to the other end of the wire 30 and holding the wire 30 and fall prevention fitting 40 in a state where they can move independently of each other. The pole 10 includes a first pole section 11 and a second pole section 12 connected to the first pole section 11 and having the opening 121 and at least a portion of the hollow space 120. The second pole section 12 is located closer to the opening 121 than at least a portion of the fall prevention fitting 40 within the hollow space 120, and has a restricting section 122 that restricts at least a portion of the fall prevention fitting 40 from reaching the opening 121.

As such, there is a possibility that the second pole section 12 may become detached from the street light 1. If the second pole section 12 is connected to the first pole section 11 by a fall prevention mechanism such as a wire, the second pole section 12 will not fall, but the opening 121 at the tip of the second pole section 12 will face downward. Even if the opening 121 faces downward, the fall prevention fitting 40 will engage with the restricting section 122. Because the fall prevention fitting 40 is rigid and does not deform, it will not exceed the restricting section 122, reducing the possibility of the lighting fixture 20 falling. In this way, the possibility of the lighting fixture 20 falling can be reduced not only if only the lighting fixture 20 becomes detached, but also if the entire second pole section 12 becomes detached. In other words, a double safety (fail-safe) function can be achieved against the falling of the lighting fixture 20.

Furthermore, for example, the street light 1 further includes a functional module 60 attached to the second pole portion 12 and having communication functions, sensor functions, or functions related to the control or installation of the lighting fixture.

This allows the street light 1 to have functions other than lighting.

Furthermore, for example, the fall prevention fitting 40 includes a rod portion 41, one end of which is held by the connecting fitting 50, and a plate portion 42 connected to the other end of the rod portion 41.

This allows the rod portion 41 to be positioned near the opening 121, making it easy to connect the connecting fitting 50 and the fall prevention fitting 40.

Furthermore, for example, if the lamp 20 becomes detached from the tip, the plate portion 42 engages with the restricting portion 122.

This prevents the plate portion 42 of the fall prevention bracket 40 from exceeding the restricting portion 122, reducing the possibility of the lighting fixture 20 falling.

Furthermore, for example, when the plate portion 42 engages with the restricting portion 122, one end of the rod portion 41 is positioned on the opening surface of the opening 121 or is positioned outside the pole 10.

This prevents shearing force from being applied to the wire 30 due to the wire 30 rubbing against the edge of the opening 121. This prevents the wire 30 from being cut, reducing the possibility of the lighting fixture 20 falling.

Furthermore, for example, the plate portion 42 is provided with a through-hole 42a that penetrates in the thickness direction.

This allows space to be secured for wiring to supply power to the lighting fixture 20.

[Modification]
Next, a modified example of the embodiment will be described. In the following description, differences from the embodiment will be mainly described, and explanation of commonalities will be omitted or simplified.

[Modification 1]
Fig. 7 is a diagram showing the fall prevention fitting 40 in a street light 201 according to Modification 1. As shown in Fig. 7, the street light 201 according to this modification differs from the street light 1 according to the embodiment in that it further includes a covering member 270.

The covering member 270 covers at least a portion of the fall prevention fitting 40. Specifically, the covering member 270 covers the portion of the fall prevention fitting 40 that may come into contact with the pole 10. For example, the covering member 270 covers the surface of the plate portion 42. More specifically, as shown in FIG. 7, the covering member 270 covers the upper surface of the plate portion 42. The covering member 270 may also cover at least one of the outer peripheral end surface and the lower surface of the plate portion 42. The covering member 270 may also cover the outer surface of the rod portion 41.

The covering member 270 is softer than the fall prevention bracket 40. For example, the covering member 270 is made of a material that is softer than metal, such as rubber or resin.

As such, the street light 201 according to this modified example further includes a covering member 270 that covers at least a portion of the fall prevention fitting 40 and is softer than the fall prevention fitting 40.

This prevents direct contact between the fall prevention bracket 40 and the pole 10, thereby reducing the generation of abnormal noise caused by metal-to-metal contact. It also prevents the fall prevention bracket 40 and the pole 10 from being scratched or damaged.

[Modification 2]
8 is a diagram showing the state of the fall-prevention fitting 340 when the lighting fixture 20 has detached from the street light 301 according to Modification 2. The street light 301 according to this modification differs from the street light 1 according to the embodiment in that it includes a fall-prevention fitting 340 instead of the fall-prevention fitting 40.

The fall prevention bracket 340 has a rod portion 341 instead of the rod portion 41. The rod portion 341 is, for example, shorter than the rod portion 41. Specifically, as shown in FIG. 8, when the lighting fixture 20 is detached and the plate portion 42 engages with the restricting portion 122, the tip of the rod portion 341 is located inside the pole 10. In other words, the tip of the rod portion 341 does not protrude from the opening 121.

In this case, at least a portion of the connecting fitting 50 is located on the opening surface of the opening 121 or outside the pole 10. Because the wire 30 is pulled downward, the connecting fitting 50 comes into contact with the edge of the opening 121, and part of the force pulling the wire 30 downward is applied to the connecting fitting 50. This makes it less likely that the wire 30 will come into contact with the edge of the opening 121 of the pole 10, and even if it does come into contact, the shear force applied to the wire 30 can be reduced. This makes it less likely that the wire 30 will be cut, further reducing the possibility of the lighting fixture 20 falling.

In this way, for example, when the plate portion 42 engages with the restricting portion 122, at least a portion of the connecting fitting 50 is positioned on the opening surface of the opening 121 or outside the pole 10.

This prevents the wire 30 from being severed by shearing force, reducing the possibility of the lighting fixture 20 falling.

[Modification 3]
9 is a diagram for explaining the function of the fall prevention fitting 40 in a street light 401 according to Modification 3. The street light 401 according to this modification differs from the street light 1 according to the embodiment in that a restriction part 441 for preventing falling is provided on the first pole part 411.

As shown in Figure 9, the street light 401 comprises a pole 410 having a first pole portion 411 and a second pole portion 412. While Figure 9 shows the first pole portion 411 and the second pole portion 412 separated, in reality the second pole portion 412 is inserted into the upper end portion of the first pole portion 411. For example, the outer diameter of the upper end portion of the first pole portion 411 is smaller than the remaining portions, and it is inserted into the opening at the lower end of the second pole portion 412. Note that there are no particular limitations on the method of fixing the first pole portion 411 and the second pole portion 412 together.

The pole 410 has a hollow space 420. The hollow space 420 has a first hollow space 421 within the first pole section 411 and a second hollow space 422 within the second pole section 412. An opening 431 is provided at the upper end of the first pole section 411. The first hollow space 421 is connected to the opening 431. An opening 432 is provided at the upper end of the second pole section 412. The opening 432 is connected to the second hollow space 422. By connecting the first pole section 411 and the second pole section 412, the first hollow space 421 and the second hollow space 422 are connected to form a single hollow space 420. The opening 432 is the same as the opening 121 in embodiment 1, and the lighting fixture 20 is attached to it.

In this modified example, the first pole portion 411 has a restricting portion 441. The function of the restricting portion 441 is the same as the restricting portion 122 in embodiment 1. By providing the restricting portion 441 on the first pole portion 411, the fall prevention bracket 40 does not detach from the opening 431 of the first pole portion 411.

In this modified example, the restricting portion 441 is a stepped portion provided on the inner surface of the first pole portion 411, but is not limited to this. The restricting portion 441 may also be a protrusion protruding from the inner surface of the first pole portion 411, similar to the restricting portion 122. In the area where the restricting portion 441 is provided, the cross-sectional area of the hollow space 420 in a cross section perpendicular to the axial direction of the first pole portion 411 is smaller than the cross-sectional area of the area where the restricting portion 441 is not provided. Therefore, the rigid plate portion 42 is engaged with the restricting portion 441 and cannot move beyond the restricting portion 441. Therefore, the fall prevention bracket 40 does not detach from the opening 431 of the first pole portion 411.

As described above, the street light 401 of this modified example comprises a pole 410 having an opening 432 at its tip and a hollow space 420 communicating with the opening 432, a lighting fixture 20 attached to the tip, a wire 30 connected at one end to the lighting fixture 20 and at least the other end located within the hollow space 420, a fall prevention fitting 40 located within the hollow space 420, and a connecting fitting 50 attached to the other end of the wire 30 and holding the wire 30 and fall prevention fitting 40 in a state where they can move independently of each other. The pole 410 comprises a first pole section 411 and a second pole section 412 connected to the first pole section 411 and having the opening 431 and at least a portion of the hollow space 420. The first pole portion 411 is located closer to the opening 432 than at least a portion of the fall prevention fitting 40 within the hollow space 420, and has a restriction portion 441 that restricts at least a portion of the fall prevention fitting 40 from reaching the opening 431.

As such, there is a possibility that the second pole portion 412 may become detached from the street light 401. If the second pole portion 412 becomes detached, the lighting fixture 20 will also become detached. With the street light 401 of this modified example, if the lighting fixture 20 attempts to fall, the wire 30, connecting fitting 50, and fall prevention fitting 40 connected to the lighting fixture 20 are pulled. At this time, the plate portion 42 of the fall prevention fitting 40 catches on the restricting portion 441, preventing the lighting fixture 20 from falling. Furthermore, at this time, the opening 432 of the second pole portion 412 faces downward, but the lighting fixture 20 is supported by the tension applied to the wire 30, connecting fitting 50, and fall prevention fitting 40 (rod portion 41), preventing it from falling. Furthermore, even if only the lighting fixture 20 is detached, the wire 30, connecting fitting 50, and fall prevention fitting 40 are pulled, and the plate portion 42 of the fall prevention fitting 40 catches on the restricting portion 441, preventing the lighting fixture 20 from falling.

[Modification 4]
10 is a diagram for explaining the function of a fall prevention fitting 540 in a street light 501 according to Modification 4. The street light 501 according to this modification differs from the street light 401 according to Modification 3 in that it is equipped with a fall prevention fitting 540 instead of the fall prevention fitting 40.

As shown in Figure 10, compared to the fall prevention fitting 40, the fall prevention fitting 540 has a rod portion 541 instead of the rod portion 41. The rod portion 541 is shorter than the rod portion 41, and almost its entirety is located within the first hollow space 422 of the first pole portion 411. Therefore, when the fall prevention fitting 540 is engaged with the restricting portion 441 and positioned at the top, part of the connecting fitting 50 is located at the same height as the opening 431 of the first pole portion 411.

Even in this case, as with variant 3, it is possible to achieve a double safety function against the lamp 20 falling.

[Modification 5]
11 is a diagram illustrating the function of a fall-prevention fitting 540 in a street light 601 according to Modification 5. Compared to the street light 501 according to Modification 4, the street light 601 according to this modification further includes a connecting member 630 and a connecting fitting 650. In this modification, the wire 30, one end of which is connected to the lighting fixture 20, and the fall-prevention fitting 540 are connected via three members: the connecting member 630, the connecting fitting 650, and the connecting fitting 50.

The connecting member 630 is, for example, a metal rod with insertion holes at both ends. The connecting member 630 has the same rigidity as the rod portion 541 of the fall prevention fitting 540. Alternatively, the connecting member 630 may be a wire with insertion holes at both ends. The connecting fittings 50 and 650 are inserted through the insertion holes at both ends of the connecting member 630, respectively.

The connecting fitting 650 is the same as the connecting fitting 50 and is, for example, a metal annular fastener.

In this way, by connecting the wire 30 and the fall prevention fitting 540 via multiple components, the range of motion between the wire 30 and the fall prevention fitting 540 can be increased. This reduces the force applied when the lighting fixture 20 is detached, thereby preventing shearing and damage to each component. This further reduces the possibility of the lighting fixture 20 falling.

In this modified example, the connecting member 630 does not have to be provided. In other words, the number of members provided between the wire 30 and the fall prevention fitting 540 may be two. Alternatively, the number of members provided between the wire 30 and the fall prevention fitting 540 may be four or more.

(others)
Although the street lamp according to the present invention has been described above based on the above embodiment, the present invention is not limited to the above embodiment.

For example, in the above embodiment, the restricting portion 122 is a protrusion provided on the inner surface of the second pole portion 12, but this is not limited to this. For example, the restricting portion 122 may be a stepped portion provided on the inner surface of the second pole portion 12. Specifically, the second pole portion 12 may be a stepped cylinder whose tip end is thinner than its rear end. In this case, the opening 121 can be made smaller than the plate portion 42, thereby preventing the fall prevention bracket 40 from being erroneously inserted through the opening 121.

Furthermore, for example, in the above embodiment, an example was shown in which the pole 10 is separable into the first pole portion 11 and the second pole portion 12, but this is not limited to this. The pole 10 may be a single (one) pole. Alternatively, the pole 10 may be separable into three or more pole portions.

Furthermore, for example, the entire fall prevention fitting 40 does not have to be rigid. For example, the plate portion 42 may be elastic and the rod portion 41 may be elastic. Even in this case, the plate portion 42 can be engaged with the restricting portion 122, thereby preventing the fall prevention fitting 40 from jumping out of the opening 121.

Furthermore, the shape of the fall prevention fitting 40 is not particularly limited. For example, instead of the plate portion 42, the fall prevention fitting 40 may have a block-shaped portion such as a cube, rectangular parallelepiped, cylinder, prism, or sphere.

In addition, the present invention also includes forms obtained by applying various modifications to each embodiment that would occur to those skilled in the art, as well as forms realized by arbitrarily combining the components and functions of each embodiment within the scope of the spirit of the present invention.

1, 201, 301, 401, 501, 601 Street light 10, 410 Pole 11, 411 First pole portion 12, 412 Second pole portion 20 Lighting fixture 30 Wire 40, 340, 540 Fall prevention metal fitting (first member)
41, 341, 541 Rod portion 42 Plate portion 42a Through hole 50 Connecting fitting (second member)
60 Functional module 120, 420 Hollow space 121, 432 Opening 122, 441 Restriction portion 270 Covering member

Claims (9)

a pole having an opening at a tip end and a hollow space communicating with the opening;
a lamp attached to the tip portion;
a wire having one end connected to the lighting fixture and at least the other end located within the hollow space;
a first member located within the hollow space and having rigidity;
a second member attached to the other end of the wire and holding the wire and the first member in a state where they can move independently of each other;
the pole has a restricting portion located closer to the opening than at least a portion of the first member in the hollow space and restricting the at least a portion of the first member from reaching the opening;
The first member is
a rod portion having one end held by the second member;
A plate portion connected to the other end of the rod portion,
Street light. a pole having an opening at a tip end and a hollow space communicating with the opening;
a lamp attached to the tip portion;
a wire having one end connected to the lighting fixture and at least the other end located within the hollow space;
a first member positioned within the hollow space;
a second member attached to the other end of the wire and holding the wire and the first member in a state where they can move independently of each other;
The pole is
A first pole portion;
a second pole part connected to the first pole part and having the opening and at least a part of the hollow space;
the second pole portion is located closer to the opening than at least a portion of the first member in the hollow space and has a restricting portion that restricts the at least a portion of the first member from reaching the opening,
The first member is
a rod portion having one end held by the second member;
A plate portion connected to the other end of the rod portion,
Street light. a pole having an opening at a tip end and a hollow space communicating with the opening;
a lamp attached to the tip portion;
a wire having one end connected to the lighting fixture and at least the other end located within the hollow space;
a first member positioned within the hollow space;
a second member attached to the other end of the wire and holding the wire and the first member in a state where they can move independently of each other;
The pole is
A first pole portion;
a second pole part connected to the first pole part and having the opening and at least a part of the hollow space;
the first pole portion is located closer to the opening than at least a portion of the first member in the hollow space and has a restricting portion that restricts the at least a portion of the first member from reaching the opening,
The first member is
a rod portion having one end held by the second member;
A plate portion connected to the other end of the rod portion,
Street light. Further, a functional module is attached to the second pole portion and has a communication function, a sensor function, or a function related to the control or installation of the lighting fixture.
4. A street light according to claim 2 or 3. The plate portion is engaged with the restricting portion when the lamp fixture is detached from the tip portion.
A street light according to any one of claims 1 to 4 . When the plate portion is engaged with the regulating portion, the one end of the rod portion is located on the opening surface of the opening or outside the pole.
6. A street light according to claim 5 . When the plate portion is engaged with the restricting portion, at least a portion of the second member is located on the opening surface of the opening or outside the pole.
7. A street light according to claim 5 or 6 . The plate portion is provided with a through hole penetrating in the thickness direction.
A street light according to any one of claims 1 to 7 . Further, a covering member that covers at least a portion of the first member and is softer than the first member is provided.
The street light according to any one of claims 1 to 8 .