JP4791382B2 - Underwater lighting - Google Patents

Description

  The present invention relates to an underwater illuminator that can be advantageously used for fish collection particularly in the sea.

  Conventionally, underwater lighting devices have been used to guide and catch horse mackerel, mackerel, squid, and the like close to the fishing boat (generally referred to as “fish collection”). It is also known to use such an underwater illuminator, for example, for work in the sea when installing a submarine cable, or for lighting up the sea near the coast.

  FIG. 3 is a partially cutaway front view showing a configuration of a conventional underwater lighting device described in Patent Document 1. As shown in FIG. 4 is an enlarged view showing a configuration in the vicinity of the distal end portion of the outer tube 58 of the underwater illumination tool 50 of FIG.

  The underwater lighting device 50 shown in FIGS. 3 and 4 includes a cylindrical base part (base end part) 51, a tube part 53 having a larger diameter than the base part 51, and a space between the base part 51 and the tube part 53. 3, an underwater illumination tube (bulb) 54 composed of a tapered portion 52, a base holder (socket) 55 that accommodates the base 51 of the underwater illumination tube 54, and the bottom (upward in FIG. 3). An outer tube (hollow case) 58 having a through hole 57 that accommodates a cord (electric wire) 56 and a base holder 55 that are electrically connected to each other) and allows the cord 56 to be extended to a power source. And a tube protecting frame (bulb guard) 59 provided at the tip of the outer tube 58. In general, a halogen lamp or a metal halide lamp is used as the above-mentioned underwater illumination tube 54 (hereinafter also referred to simply as “tube”).

  In this underwater illumination tool 50, a special underwater illumination tube 54 in which a step portion 51a is formed in a base 51 is used. In the underwater illumination tool 50, the annular packing 65 and the O-ring are used in order to prevent water from entering the base part holder 55 that houses the base part 51 of the tube 54 for underwater illumination when used underwater. 61 is used.

  The annular packing 65 has a configuration in which an annular plate-like elastic body (annular elastic body) 62 is sandwiched between an upper ring body 63 and a lower ring body 64. It is disposed between the stepped portion 51 a of the base portion 51 and the inner wall of the outer tube 58. The O-ring 61 is disposed between the upper edge of the stepped portion 51 a and an inward protruding portion 63 a formed on the inner periphery of the upper ring 63 of the annular packing 65.

  The annular packing 65 is tightened in the thickness direction (vertical direction in FIG. 4) by pressing the packing retainer 66 by tightening the bolt 67. As a result, the annular plate-like elastic body 62 of the annular packing 65 bulges inward, and deforms along the chevron shape of the step portion 51a formed on the base portion 51 of the tube 54 for underwater illumination. Adheres to 51a. Further, when water pressure is applied to the underwater illumination tool 50, the underwater illumination tube 54 is pushed toward the base holder 55 by the water pressure, and the stepped portion 51 a is brought into close contact with the O-ring 61. As described above, the underwater illumination tool 50 of Patent Document 1 has an outer jacket in which the base part holder 55 is accommodated because the elastic body 62 and the O-ring 61 are sufficiently in close contact with the stepped portion 51a of the tube 54 for underwater illumination. It is said that the water tightness inside the tube 58 is excellent.

In Patent Document 2, the underwater illumination tool as described above is one in which the step portion of the tube for underwater illumination to be used has a mountain shape as shown in FIG. In some cases, quality control of the shape of the stepped portion is difficult, and stress is concentrated linearly on the stepped portion when the annular packing is tightened. ing. When the step portion of the tube for underwater illumination has a step as shown in FIG. 5B of the same publication, the tube is placed outside the outer tube when the annular packing is tightened. It is described that it tends to protrude and cause water leakage (water intrusion into the outer tube in which the cap holder is accommodated). And in this publication, a protruding curved portion is formed on the periphery of the tube for underwater illumination used in such an underwater illumination tool, and the diameter of the tube base portion side of the protruding curved portion is set to a protruding curved portion. By making the diameter smaller than the diameter on the tip side of the tube, when the annular packing is tightened, the force that presses the tube toward the base part acts, so the occurrence of water leakage as described above is prevented. It is stated that it can be done.
Japanese Utility Model Publication No. 63-6812 JP-A-8-124522

  As described above, the underwater lighting device of Patent Document 1 needs to prepare a special tube for underwater lighting in which a step portion is formed. In addition, this underwater illuminator is damaged when the annular packing is fastened to attach the tube for underwater illumination to the outer tube, or the tube is damaged due to stress concentration on the stepped portion, or the tube is not attached to the outer tube. It tends to cause problems such as water leaking outside. For this reason, when using this underwater illuminator, it is necessary to thoroughly control the quality of the shape of the step portion of the tube for underwater illumination, or carefully attach the tube to the outer tube. Become.

  Moreover, since the underwater illumination tube of Patent Document 2 is unlikely to protrude from the outer tube, the occurrence of water leakage can be prevented. However, the underwater illuminator of Patent Document 2 also needs to prepare a special underwater illumination tube set in a predetermined shape having a protruding curved portion.

  In addition, the underwater illumination tool of Patent Document 1 or Patent Document 2 described above is in a state where the stepped portion or the protruding curved portion of the tube for underwater illumination is arranged at a predetermined position in the thickness direction of the annular plate-shaped elastic body. If the annular packing is not tightened, water may not be prevented from entering the outer tube.

  For example, in the underwater illumination tool 50 of Patent Document 1 shown in FIGS. 3 and 4, the annular packing 65 is tightened in a state where the step portion 51 a of the tube 54 for underwater illumination is disposed below the illustrated state. In addition, there may be a gap between the upper edge of the step portion 51a and the O-ring 61, or the annular plate-like elastic body 62 may be insufficiently adhered to the lower edge of the step portion 51a. Because. Therefore, when the user removes the tube 54 from the outer tube 58 in order to replace the tube 54 for underwater illumination or the annular packing 65 in which the elastic body 62 has deteriorated due to the heat generated by the tube 54, The new (or removed) tube must be attached to the outer tube with care so that its step is positioned in place (the position shown in FIG. 4).

  Furthermore, when water pressure is applied to the underwater illumination tool 50 and the underwater illumination tube 54 is pushed and moved toward the base holder 55 by this water pressure, the stepped portion 51a of the tube 54 is also moved accordingly. Move to the holder 55 side. For this reason, the contact state (that is, watertightness) between the stepped portion 51a of the tube 54 and the elastic body 62 deformed into a shape corresponding to the stepped portion 51a varies, or in an extreme case, the stepped portion 51a is elastic. In some cases, water may enter the outer tube 58 by detaching from the body 62 or the like.

  The problem of the present invention is that it is possible to prevent water from entering the base holder even when water pressure is applied, without using a special underwater illumination tube formed with a stepped portion or protruding curved portion, and An object of the present invention is to provide an underwater lighting device that can prevent damage to a tube.

The present invention relates to an underwater illumination tube comprising a cylindrical base part, a tube part having a larger diameter than the base part, and a tapered part interposed between the base part and the tube part; A base part holder for receiving the base part of the base; a cord electrically connected to the bottom of the base part holder; an outer tube having a through-hole for receiving the base part holder and enabling the extension of the cord to the power source; An underwater illumination device comprising a tube protection frame provided at the distal end of the outer tube, wherein the outer tube has a distal end that extends beyond the tapered portion of the underwater illumination tube to the base of the tube portion. We extend, between the inner wall of the tapered portion and the outer tube of the at no less water illumination tube, and O-ring in each of between the base and the inner wall of the mantle tube of the tube portion of underwater lighting tube A watertight structure is formed by the provision of the It has been hampered, and the thickness of the O-ring between the inner wall of the base and the outer tube of the tube portion of the water illumination tube has an inner wall of the tapered portion of the underwater illumination tube and outer tube It is in the underwater lighting fixture characterized by being larger than the thickness of the O-ring between .

  In the underwater illumination tool of the present invention, it is provided between the tapered portion of the underwater illumination tube and the inner wall of the outer tube, and between the base portion of the tube portion of the underwater illumination tube and the inner wall of the outer tube. Since the water-tight structure is formed by the formed O-ring, it is not necessary to use a special underwater lighting tube having a stepped portion or a protruding curved portion. Therefore, for example, the stress is not concentrated on the stepped portion and the protruding curved portion due to the force applied to the tube for underwater illumination at the time of attachment to the outer tube, so that the tube can be prevented from being damaged. Furthermore, even when the tube for underwater illumination is attached to the outer tube without paying special attention, or when the tube for underwater illumination is moved to the base holder side by water pressure, the inside of the tube is stabilized. In addition, since watertightness can be maintained, it is possible to prevent water from entering the base holder.

  The underwater illumination tool of the present invention will be described with reference to the accompanying drawings. FIG. 1 is a partially cutaway front view showing a configuration example of the underwater illumination tool of the present invention. 2 is an enlarged view showing a configuration in the vicinity of the distal end portion 18a of the outer tube 18 of the underwater illumination tool 10 of FIG. However, in FIG. 2, the description of the tube protecting frame 19 shown in FIG. 1 is omitted.

  An underwater lighting device 10 shown in FIGS. 1 and 2 includes a cylindrical base part 11, a tube part 13 having a larger diameter than the base part 11, and a tapered part interposed between the base part 11 and the tube part 13. A tube part 14 for underwater illumination; a base part holder 15 that accommodates the base part 11 of the tube 14 for underwater illumination; electrically connected to the bottom (upper part in FIG. 1) of the base part holder 15 An outer tube 18 having a through hole 17 for accommodating the base holder 15 and allowing the cord 16 to be extended to a power source; and a tube protection frame 19 provided at a distal end portion 18 a of the outer tube 18. Etc. In the underwater illumination tool 10 of the present invention, the distal end portion 18a of the outer tube 18 extends beyond the tapered portion 12 of the underwater illumination tube 14 to the base portion 13a of the tube portion 13, and the underwater illumination tube O-rings 21 and 22 are provided between the tapered portion 12 of the sphere 14 and the inner wall of the outer tube 18, and between the base portion 13 a of the tube portion 13 of the underwater illumination tube 14 and the inner wall of the outer tube 18. Therefore, the water-tight structure is formed, and the main feature is that entry of water into the base holder 15 is prevented.

  As shown in FIG. 1, the underwater illumination tool 10 of the present invention uses a tube 14 for underwater illumination comprising a cylindrical base part 11, a taper part 12 and a tube part 13, and the conventional underwater illumination. It is not necessary to use a special tube for underwater illumination in which a stepped portion or a protruding curved portion is formed as in the case of a tool. Therefore, as the underwater lighting tube 14 of the underwater lighting device 10, for example, a tube (not having a stepped portion or a protruding curved portion) attached to the hull of a fishing boat and used on the water for collecting fish is diverted. You can also

  As the underwater illumination tube 14, for example, a halogen lamp or a metal halide lamp provided with a screw-type base 11a in the base part 11 is preferably used.

  The underwater lighting tool 10 of the present invention is mainly characterized in that a watertight structure is formed by the O-rings 21 and 22 as described above. That is, if such a watertight structure can be formed, an underwater illumination tube having a stepped portion and a protruding curved portion is used as the underwater illumination tube 14 of the underwater illumination tool 10 of the present invention (for example, It is also possible to divert a tube for underwater illumination in which a stepped portion and a protruding curved portion used in a conventional underwater illumination tool are formed.

  As shown in FIG. 1, the base portion 11 of the underwater illumination tube 14 is accommodated in a base portion holder 15. The base part holder 15 includes a holder body 15e, a pair of external terminals 15a and 15b provided on the bottom of the holder body 15e (upper part in FIG. 1), and a pair electrically connected to each external terminal. Internal terminals 15c and 15d. The holder body 15e electrically insulates the pair of external terminals 15a and 15b from each other and electrically insulates the pair of internal terminals 15c and 15d from each other, and generates heat when the underwater illumination tube 14 is turned on. In order to prevent deformation due to, generally, it is formed from a material excellent in electrical insulation and heat resistance typified by a ceramic material.

  One end of a cord (power cable) 16 is electrically connected to the pair of external terminals 15 a and 15 b provided at the bottom of the base holder 15. The other end of the cord 16 is electrically connected to a power source (not shown) mounted on the fishing boat, for example.

  In the lead-out portion of the cord 16 to the outside of the outer tube 18, the annular elastic body 24 is compressed by tightening with a bolt 26 together with a washer 25 disposed on the upper surface thereof, whereby the inner edge of the annular elastic body 24 is inside. The watertight structure is formed by causing the cord 16 to bulge and adhere to the cord 16. If the annular elastic body 24 is directly tightened by the bolt 26 without using the washer 25, the annular elastic body 24 may be twisted and a watertight structure may not be reliably formed. When the washer 25 is disposed on the upper surface of the annular elastic body 24, the tip end surface of the bolt 26 slides along the upper surface of the washer 25 when the bolt 26 is tightened, so that the twisting of the annular elastic body 24 is prevented. be able to. The annular elastic body 24 is formed of a rubber material typified by silicone rubber or chloroprene rubber, or a soft resin material. Such a watertight structure in the lead-out portion of the cord 16 is the same as that of a known underwater lighting device.

  The outer tube 18 is provided with a through hole 17 that accommodates the cap holder 15 and allows the cord 16 to be extended to a power source. The outer tube 18 can be manufactured by, for example, machining a metal bar using a lathe or a milling machine, or casting a metal material.

  As the metal material forming the outer tube 18, it is common to use a copper alloy typified by brass (copper-zinc alloy) or gun metal (copper-tin alloy) because of excellent workability and low cost. It is. In addition, since copper alloy is excellent in thermal conductivity, when a copper alloy mantle tube is used, the temperature difference between the outside and the inside of the mantle tube becomes small when the underwater illumination tool is used in water. For this reason, generation | occurrence | production of the dew condensation within the outer tube can be suppressed.

  A weight 30 made of lead, for example, is attached around the outer tube 18 in order to prevent the underwater lighting device 10 from being swept into the ocean current.

  The tube protection frame 19 provided at the distal end portion of the outer tube 18 is brought into contact with the hull of the fishing boat when, for example, the underwater lighting device 10 is thrown into the sea from a fishing boat for fishing or is lifted from the sea. Damage to the tube 14 for underwater illumination due to, and damage to the tube 14 due to collision of fish or the like in the sea.

  The tube protection frame 19 of the underwater lighting device 10 is composed of a pair of ring bodies 19a and 19a and a total of six struts 19b that connect the both rings. For example, a metal material such as stainless steel Formed from.

  The tube protection frame 19 is fixed to a notch portion 18 b formed along the outer edge of the distal end portion 18 a of the outer tube 18 by a bolt 27. When the tube protection frame 19 is fixed to the notch 18b, one of a bolt 27 for fixing the tube protection frame 19 and a bolt 28 used for compression of the O-ring 22 described later. When tightening, the other does not get in the way.

  Further, the eye bolt 31 and the rope 32 attached to the top surface of the outer tube 18 apply tension to the lead-out portion of the cord 16 from the outer tube 18 when the underwater illumination tool 10 is used in water. Is preventing. This is because when the tension is applied to the lead portion of the cord 16 from the outer tube 18, the diameter of the cord 16 is reduced, which may cause water leakage in the lead portion of the cord 16 of the outer tube 18. .

  As in the conventional underwater lighting device 50 shown in FIG. 3, the outer tube 58 may be integrally formed with a rope fixing portion 68 having a through hole 68a through which the rope is passed. The outer tube 58 must be produced by casting or complicated machining. On the other hand, when the eyebolt 31 is used as in the underwater illumination tool 10 of FIG. 1, it is not necessary to form a rope fixing portion, and thus the outer tube 18 can be easily manufactured using a lathe.

  As described above, the underwater lighting tool 10 of the present invention has the distal end portion 18a of the outer tube 18 extending beyond the tapered portion 12 of the underwater illumination tube 14 to the base portion 13a of the tube portion 13, An O-ring 21 is provided between the tapered portion 12 of the lighting tube 14 and the inner wall of the outer tube 18, and between the base portion 13 a of the tube portion 13 of the underwater lighting tube 14 and the inner wall of the outer tube 18. The main feature is that a watertight structure is formed by the provision of 22 and the penetration of water into the base holder 15 is prevented.

  In the underwater illuminator 10 shown in FIGS. 1 and 2, the cylindrical body 23 fitted into the through hole 17 of the outer tube 18 is provided in order to stably arrange the O-rings 21 and 22 at the predetermined positions. It is used. The tubular body 23 includes an annular protrusion 23 a that protrudes toward the tapered portion 12 of the underwater illumination tube 14, and the underwater illumination tube 14 is located above the distal end portion 18 a of the outer tube 18. Are disposed around the taper portion 12 and the base portion 13a of the tube portion 13. The O-ring 21 is disposed along the corner between the inner peripheral surface of the cylindrical body 23 and the lower surface of the annular projecting portion 23a, and supports the periphery of the tapered portion 12 of the tube 14 for underwater illumination, and The O-ring 22 is disposed along the corner between the lower end surface of the cylindrical body 23 and the inner wall of the outer tube 18 and supports the periphery of the base portion 13 a of the tube portion 13 of the underwater illumination tube 14.

  The cylindrical body 23 is preferably formed from a metal material because deformation due to heat generation during lighting of the underwater illumination tube 14 is prevented and the processing thereof is facilitated. As the metal material forming the cylindrical body 23, it is preferable to use a copper alloy typified by brass or gun metal in order to suppress the formation of condensation inside the outer tube 18 as in the case of the outer tube 18.

  The cylinder body 23 may be fixed to the outer tube 18 or may be formed integrally with the outer tube 18. However, when the cylindrical body 23 is formed integrally with the outer tube 18, for example, the diameter of the opening at the upper part of the cylindrical body is set to the base portion in order to allow the base holder 15 to be accommodated inside the outer tube 18. It is preferable to set the diameter larger than the outer diameter of the holder. Considering the workability when housing the base holder 15 inside the outer tube 18 or the workability when taking out the base holder 15 from the outer tube 18 due to breakage, the cylindrical body 23 is attached to the outer tube 18. It is preferable to prepare as a separate part.

  In the underwater lighting tool 10 of the present invention, the O-ring 22 is compressed in the thickness direction by pressing the annular pressing tool 33 provided on the distal end portion 18 a of the outer tube 18 by tightening the bolt 28. As a result, the inner edge of the O-ring 22 bulges inward and comes into close contact with the periphery of the base portion 13a of the bulb portion 13, and the outer edge of the O-ring 22 bulges outward and comes into close contact with the inner wall of the outer tube 18 to The interior of the outer tube 18 that houses the holder 15 is kept watertight. The annular pressing tool 33 is formed from a metal material such as the copper alloy or stainless steel.

  When the O-ring 22 is used as described above, the surface of the O-ring 22, the inner wall of the outer tube 18 and the lower end surface of the cylindrical body 23, and the surface of the O-ring 22 and the outer tube 18 as shown in FIG. By the inner wall and the upper surface of the annular pressing tool 33, gaps 29 a and 29 b are formed on the outer tube 18 side of the O-ring 22. Due to the presence of such gaps 29a and 29b, the O-ring 22 is greatly deformed in the horizontal direction in cross section when compressed in the thickness direction as described above. For this reason, the inner edge of the O-ring 22 bulges out and comes into close contact with the periphery of the base portion 13a of the bulb portion 13, and the outer edge also bulges out and comes into close contact with the inner wall of the outer tube 18 sufficiently. For this reason, the inside of the outer tube 18 can be kept sufficiently watertight, and water can be prevented from entering the base holder 15.

  On the other hand, the annular plate-like elastic body 62 provided in the conventional underwater illumination device 50 shown in FIGS. 3 and 4 has an upper ring surface 63, a lower ring body 64, and an outer ring surface, respectively. The outer tube 58 is in close contact with the gap. For this reason, since the elastic body 62 has no gap as described above, its cross-sectional shape is not greatly deformed in the horizontal direction. That is, the conventional underwater lighting device 50 has a small bulge amount of each of the inner edge and the outer edge of the elastic body 62. Therefore, the special tube 54 (and the O-ring 61) in which the step portion 51a is formed as described above. Is used to keep the inside of the outer tube 58 watertight.

  1 and 2, the O-ring 22 is in close contact with the periphery of the base portion 13a of the cylindrical tube portion 13 of the tube 14 for underwater illumination. And like the annular plate-like elastic body 62 of the conventional underwater illumination tool 50 shown in FIG. 4, it is deformed according to the shape of the step portion 51a of the tube 54 for underwater illumination, and is fitted into this step portion 51a. In this way, the tube 54 is not in close contact with the periphery. Therefore, in the underwater lighting device 10 of the present invention, even when the underwater lighting tube 14 is attached to the outer tube 18 without paying special attention to its vertical position, the O-ring 22 is connected to the tube. Since the periphery of the base portion 13a of the sphere portion 13 can be sufficiently adhered, the inside of the outer tube 18 can be stably kept watertight.

  Further, even when water pressure is applied to the underwater illumination tool 10 and the underwater illumination tube 14 is pushed to the base part holder 15 side by this water pressure and moved upward, the O-ring 22 causes the tube portion 13 to move. Only the position for supporting the base portion 13a varies, and the water tightness inside the outer tube 18 does not vary greatly. However, when the movement of the underwater illumination tube 14 by the water pressure as described above is allowed without limitation, the base holder 15 that accommodates the base 11 of the tube 14 is pressed against the outer tube 18, and the base 11 In some cases, the base 11a or the base holder 15 provided in the above may be damaged. In order to prevent this, in the underwater illumination tool 10 of the present invention, the periphery of the tapered portion 12 of the underwater illumination tube 14 is supported by the O-ring 21.

  As described above, the underwater illumination tool 10 of the present invention uses the O-ring 21 and the O-ring 22 to convert the underwater illumination tube 14 into the outer tube 18 without paying special attention to the vertical position thereof. Even when attached or when water pressure is applied at the time of use, a watertight structure that can stably keep the inside of the outer tube 18 watertight is formed, thereby preventing water from entering the base holder 15. The effect that it can be prevented is demonstrated.

  Moreover, it is not necessary to use the special tube for underwater illumination which has a step part and a protrusion curved part for the underwater lighting fixture 10 of this invention. Accordingly, the underwater lighting device 10 is subjected to external vibration applied to the underwater lighting device 10 during use (for example, the underwater lighting device is used for collecting fish) by the force applied to the tube 14 for underwater lighting when attached to the outer tube 18. The vibrations caused by contact with the hull of a fishing boat when thrown into the sea or withdrawn from the sea) do not cause a problem that the tube is damaged due to concentration of stress on the stepped part and the protruding curved part. As described above, this is also the case when the underwater illumination tube formed with the stepped portion and the protruding curved portion provided in the conventional underwater illumination device is used as the underwater illumination tube of the underwater illumination device of the present invention. It is the same.

In the underwater illumination tool 10 of the present invention, the thickness of the O-ring 22 between the base portion 13 a of the tube portion 13 of the underwater illumination tube 14 and the inner wall of the outer tube 18 is the taper of the underwater illumination tube 14. parts 12 and not greater than the thickness of the O-ring 21 between the inner wall of the mantle tube 18. As described above, in the underwater illumination tool 10 of the present invention, the O-ring 22 has its inner edge and outer edge greatly bulged, and the base portion 13a of the tube portion 13 of the tube 14 for underwater illumination and the outer tube 18 are formed. By closely contacting each of the inner wall and the inner wall, the inside of the outer tube 18 is kept watertight. On the other hand, the O-ring 21 mainly functions to support the tapered portion 12 of the tube 14 in order to prevent unlimited movement of the tube 14 for underwater illumination due to water pressure. Therefore, the thickness of the O-ring 22 which is necessary to significantly bulge the inner and outer edges in order to keep the inside of the mantle tube 18 watertight is rot larger than the thickness of the O-ring 21.

  The thickness of the O-ring 21 is preferably in the range of 1 to 10 mm, more preferably in the range of 2 to 8 mm. The thickness of the O-ring 22 is preferably in the range of 2 to 15 mm, and more preferably in the range of 3 to 10 mm. In the underwater lighting tool 10 shown in FIGS. 1 and 2, for example, the thickness of the O-ring 21 is set to 5.0 mm, and the thickness of the O-ring 22 is set to 6.0 mm. Each of the O-ring 21 and the O-ring 22 is made of a rubber material having excellent heat resistance, such as silicone rubber, in order to be in close contact with the underwater illumination tube 14 that generates heat during lighting.

  In addition, in the underwater lighting fixture 10 of the present invention, the O-ring 21 and the O-ring 22 are used to form a watertight structure. There is also an advantage that can be easily purchased and used by diverting or specifying the shape (thickness, inner diameter and outer shape) and material.

  As shown in FIGS. 1 and 2, it is preferable that a part of the O-ring 22 in the thickness direction protrudes below the distal end portion 18 a of the outer tube 18. As described above, when a part of the O-ring 22 protrudes downward from the distal end portion 18 a of the outer tube 18, the shape of the annular pressing tool 33 is changed to the through hole 17 of the outer tube 18 in order to compress the O-ring 22. There is no need to set a complicated shape with an annular protrusion inserted inside. For example, when the shape of the annular pressing tool 33 is set to an annular plate shape as shown in FIGS. 1 and 2, the annular pressing tool 33 is easily produced (or a commercially available washer is used as the annular pressing tool). Can do.

  Further, as shown in FIGS. 1 and 2, when the annular pressing tool 33 is disposed outside the through hole 17 of the outer tube 18, the entire lower end surface of the cylindrical body 23 is above the upper surface of the annular pressing tool 33. Therefore, the O-ring 22 can be uniformly compressed (the watertight structure can be stably formed) by the lower end surface of the cylindrical body 23 and the upper surface of the annular pressing tool 33.

  For example, in the conventional underwater lighting device 50 shown in FIGS. 3 and 4, an annular packing having a configuration in which an annular plate-like elastic body 62 is sandwiched and integrated between an upper ring body 63 and a lower ring body 64. 65 is used, and both of the ring bodies 63 and 64 are disposed inside the through hole 57 of the outer tube 58. If these parts are not integrated, the outer diameter of each of the upper ring body 63 and the lower ring body 64 is slightly smaller than the diameter of the through hole 57 to be inserted into the through hole 57 of the outer tube 58. Therefore, the ring bodies 63 and 64 of the both rings slightly move in the horizontal direction inside the through-hole 57 (the lower surface of the upper ring body is located above the upper surface of the lower ring body). In some cases, the elastic body 62 may be compressed non-uniformly (a watertight structure cannot be stably formed). However, in the underwater lighting device 50 of the same document, the upper ring 63, the lower ring 64, and the elastic body 62 are integrated, and thus the above-described problem does not occur. However, when the elastic body 62 deteriorates due to heat generated when the underwater illumination tube 54 is turned on, it is necessary to replace (usually discard) the upper ring body 63 and the lower ring body 64 together with the elastic body 62. .

  That is, as in the case of the conventional underwater illumination tool, when the annular pressing tool 33 is arranged outside the through-hole 17 of the outer tube 18 as in the underwater illumination tool 10 of the present invention shown in FIGS. The watertight structure can be stably formed without using a special annular packing, and if the O-ring 22 deteriorates due to heat generated when the underwater illumination tube 14 is turned on, only the O-ring 22 is attached. Replace it.

  Moreover, in the underwater lighting fixture of this invention, it is preferable that the nozzle | cap | die part holder is accommodated in the state which can be moved up and down inside the through-hole of a mantle tube. In the underwater illuminator 10 shown in FIGS. 1 and 2, a plurality of (for example, four) grooves 18c are formed on the inner wall of the outer tube 18 at intervals along the circumferential direction thereof, and A projection 15f formed on the holder body 15e of the base part holder 15 is fitted in each groove 18c. Thereby, the base part holder 15 is movable in the vertical direction along the groove 18 c inside the through hole 17 of the outer tube 18.

  If the mouthpiece holder 15 is fixedly disposed inside the through hole 17 of the outer tube 18, the underwater illumination tube 14 moves upward by the water pressure when the underwater illumination tool 10 is subjected to water pressure. Then, since it is pressed against the base part holder 15, the base 11 a of the tube 14 or the base part holder 15 may be damaged. In particular, since the holder body 15e is usually formed of a ceramic material, the holder body 15e is easily damaged when the underwater illumination tube 14 is pressed by water pressure.

  As described above, when the base part holder 15 is movable in the vertical direction, when the underwater illumination tube 14 is moved upward due to water pressure, the base part holder 15 is moved upward accordingly. Therefore, the tube 14 is not pressed against the base part holder 15. For this reason, damage to the cap 11a of the tube 14 or the cap holder 15 can be prevented. The force applied to the underwater illumination tube 14 by water pressure is applied to the outer tube 18 via the O-ring 21 and the cylindrical body 23.

  Further, when the projection 15f of the base part holder 15 is fitted in the groove 18c of the outer tube 18 as described above, the base part holder 15 is prevented from rotating inside the through hole 17 of the outer tube 18, The work of screwing the base part 11 of the tube 14 for underwater illumination into the base part holder 15 is facilitated.

  As described above, the underwater illumination tool of the present invention is not damaged when the tube is attached, even when the tube for underwater illumination is attached to the outer tube without paying special attention. The inside of the outer tube can be kept stable and watertight. For this reason, the underwater lighting device of the present invention causes no problem even if the user uses the underwater lighting device for fish collection on a daily basis and is not skilled in the installation of the tube for underwater lighting. Can be used without For this reason, in addition to the use for collecting fish as described above, the underwater lighting device of the present invention can be used for an amusement lighting device that illuminates a pool, hot spring, lake, river, sea near the coast, or underwater. It is also expected to be used as a lighting fixture for work.

It is a partially notched front view which shows the structural example of the underwater lighting fixture of this invention. It is an enlarged view which shows the structure of the vicinity of the front-end | tip part of the mantle tube 18 of the underwater lighting tool 10 of FIG. It is a partially notched front view which shows the structure of the conventional underwater lighting fixture. FIG. 4 is an enlarged view showing a configuration in the vicinity of the distal end portion of the outer tube 58 of the underwater illumination tool 50 of FIG. 3.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Underwater illumination tool 11 Base part 11a Screw-type base 12 Tapered part 13 Tube part 13a Base part of tube part 13 Underwater illumination tube 15 Base part holder 15a, 15b External terminal 15c, 15d of base part holder 15 Internal terminal 15e of the holder 15e Holder body 15f of the base holder 15 Protrusion of the holder body 15e 16 Cord 17 Through hole 18 Outer tube 18a End portion 18b of the outer tube 18 Notch portion 18c of the outer tube 18 Groove 19 of the outer tube 18 Tube protection frame 19a Ring body 19b Strut 21 O-ring 22 O-ring 23 Tubular body 23a Ring-shaped protrusion 24 Ring-shaped elastic body 25 Washer 26, 27, 28 Bolt 29a, 29b Air gap 30 Weight 31 Eye bolt 32 Rope 33 Ring pressing tool 50 Underwater lighting fixture 51 Cap part 51a Step part 52 Taper part 53 Tube Portion 54 Tube for underwater illumination 55 Cap holder 56 Code 57 Through-hole 58 Outer tube 59 Tube protection frame 61 O-ring 62 Circular plate-like elastic body 63 Upper ring body 63a Inner protrusion part 64 of the upper tube body 63 Lower ring body 65 Ring packing 66 Packing presser 67 Bolt 68 Rope fixing part 68a Through hole

Claims (1)

A tube part for underwater illumination comprising a cylindrical base part, a tube part having a larger diameter than the base part, and a tapered part interposed between the base part and the tube part; the base part of the tube for underwater illumination A base holder for receiving the base; a cord electrically connected to the bottom of the base holder; an outer tube having a through hole for receiving the base holder and allowing the cord to extend to a power source; and An underwater illuminator comprising a tube protecting frame provided at a distal end portion of an outer tube, the distal end portion of the outer tube extending beyond a tapered portion of the underwater illumination tube to a base portion of the tube portion. Te, even without least between the inner wall of the tapered portion of the water in the illumination tube and outer tube, and an O-ring respectively between the inner wall of the base and the outer tube of the tube portion of the water in the lighting tube is A watertight structure is formed by the provision of this, preventing water from entering the base holder. It is and and the thickness of the O-ring between the inner wall of the base and the outer tube of the tube portion of the water illumination tube is between the inner wall of the tapered portion of the underwater illumination tube and outer tube An underwater lighting device characterized by being larger than the thickness of the O-ring .

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