JPH0134507Y2 - - Google Patents

Description

[Detailed description of the invention] In order to prevent damage from lightning strikes, it is stipulated by law that buildings exceeding a specified height must be equipped with lightning protection equipment. In this case, a needle, which is a lightning receiving part, is usually attached to the building itself, which is the object to be protected, but if there is a tall tree nearby, the needle may be attached using that tree.

The present invention relates to a band for supporting a lightning conductor, which guides the lightning current from the prongs to the ground, on the trunk of a tree in such a case.

When installing a lightning conductor using a tree, the lightning conductor must be supported on the trunk of the tree.
The trunk of a tree becomes thicker as it grows, so
To cope with this, a band has been proposed that is elastically stretchable by interposing a spring. To explain this with reference to FIG. 1, reference numeral 1 denotes a band plate formed in an annular shape (the middle part is omitted in the drawing), and metal fittings 2 and 3 each bent into an L shape are attached to both ends of the band plate. In addition, these L-shaped fittings 2 and 3 have
When the band plate 1 is formed into an annular shape, through holes 4 and 5 are formed in the opposing pieces 2' and 3', and the other pieces 2'' and 3' are provided with through holes 4 and 5, respectively.
Elongated holes 6, 7 are bored in the holes 3'', and the ends of the band plate 1 are inserted through the elongated holes 6, 7 and attached with rivets 8, 9, etc.
5 with coil springs 10 and 11 interposed between the bolts 1 and 5.
2 is inserted through the bolt 12, and a nut 13 is screwed onto the bolt 12, whereby the band plate 1 is formed into an annular shape and configured to be elastically extensible.

A band thus constructed, when supporting a lightning conductor on the trunk of a tree, is suitable for use with bolts 12
With the nut 13 removed together with the coil springs 10 and 11, the strip plate 1 is wrapped around the stem to hold down the lightning conductor, and the through holes 4 and 5 of the L-shaped fittings 2 and 3 are
By inserting the bolt 12 through the coil springs 10 and 11, screwing the nut 13 together, and appropriately tightening the coil springs 10 and 11 to elastically attach the band, the lightning conductor can be attached to the tree. It is supported by being pressed against the trunk.

Therefore, if such a band is used, even if the trunk of the tree gradually becomes thicker as it grows, the band will stretch due to the elastic action of the coiled spring, so there will be no hindrance to the growth of the tree. Its functionality is maintained without any problems.

However, each tree trunk has a different thickness,
Also, since it depends on the attachment position of the band, by making the band elastically stretchable by interposing a coil spring as described above, it is possible to cope with changes in the thickness of the trunk as the tree grows. Even if the length of the band is constant, there is a limit to the allowable range of the band. Therefore, for a band with the above structure, it is not enough that the band has the same size. Multiple types with different lengths are required. Furthermore, according to this band, the lightning conductor is supported by being pressed against the trunk of the tree, so the lightning conductor is susceptible to damage and there is a risk that its function may be impaired.

In view of the above points, the present invention has been developed to provide a tree support band for lightning conductors that can be elastically expanded with the intervention of springs, in order to accommodate changes in the thickness of the tree trunk as the tree grows. The length of the lightning conductor can be freely adjusted within a wide tolerance range depending on the thickness of the tree trunk, and arm pieces that support the lightning conductor are provided to protrude outward.

An example of this will be described below with reference to FIG. 2. Reference numeral 101 is a band plate formed in an annular shape (the middle part is omitted in the drawing), and a plurality of screw holes 102 are formed in one end 101' in line with the length direction. Further, at the other end 101'', a guide piece 103 having a guide groove through which the end 101' is slidably inserted is fixed in two places in line with the length direction. Bolts 104 and 105 are provided upright in one of the screw holes 102 and the endmost guide piece 103, respectively, and an arm piece 106 that supports a lightning conductor is provided on the other guide 103 so as to protrude outward.Note 107 is a coil spring, whose both ends are hooked to the bolts 104 and 105, and the nuts 108 and 109 are screwed together, so that the strip plate 1
01 is formed into an annular shape and configured to be elastically extensible.

Next, to explain its function, when supporting the lightning conductor on the trunk of a tree using this band, the strip plate 101 is attached with the coil spring 107 removed.
By winding the band around the tree trunk, tensioning the coil spring 107 between the bolts 104 and 105 against the contraction force, and then screwing the nuts 108 and 109 together, the band is first attached to the trunk of the tree to provide elasticity. After attaching it to the trunk, it is sufficient to support it by inserting a lightning conductor extending along the trunk into the arm piece 106. Note that since the bolt 104 of the end portion 101' can be installed upright in any screw hole 102,
When attaching the band to the trunk of a tree, depending on the thickness of the trunk, the position of the bolt 104 may be arbitrarily selected so that the substantial length of the band plate 101 matches it. If the trunk of the tree becomes thicker as it grows after being attached, the bolt 104 may be moved to another screw hole 102 to change its position.

In this embodiment, the guide pieces 103 are provided at two locations, but the function of the guide pieces 103 is not impaired even if the guide pieces 103 are provided at only one location. In such a case, the bolt 105 and the arm piece 106 may be erected on the same guide piece 103, or they may be erected directly on the end portion 101'' itself.

As described above, according to the present invention, the tree support band of the lightning conductor that can be expanded by the intervention of a spring has been improved so that the length of the band can be adjusted according to the thickness of the tree trunk. , the tolerance range for responding to changes in trunk thickness as the tree grows increases,
There is no inconvenience of having to prepare a plurality of strips with different lengths as in the past, and it is also economical. Furthermore, since the arm piece is provided protruding from the outside of the band to support the lightning conductor, the lightning conductor is always away from the trunk of the tree, so no pressure is applied to it and its function is impaired. This will eliminate the fear.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing a band for supporting a tree of a lightning conductor in a conventional lightning protection system, with the middle part of a strip plate 1 omitted, and FIG. 2 is a perspective view showing an embodiment of the present invention. 101... Band plate, 102... Screw hole, 103...
... Guide piece, 104, 105 ... Bolt, 106
...Arm piece, 107...Coil spring.

Claims (1)

[Scope of utility model registration request] In a tree support band for a lightning conductor in lightning protection equipment that can be elastically expanded with the intervention of a spring,
A plurality of screw holes 102 are formed in one end 101' of the annularly formed band plate 101 in line with its length, and a guide groove is provided in the other end 101'' through which the end 101' is slidably inserted. A guide piece 103 having a shape is fixed, and bolts 104 and 105 are respectively erected between one of the screw holes 102 and the guide piece 103 or the end 101'' itself,
Coil spring 10 between both bolts 104 and 105
7 is stretched against the contraction force, and the guide piece 1
03 or a band for supporting a tree for a lightning conductor in lightning protection equipment, characterized in that an arm piece 106 for supporting the lightning conductor is provided on the end 101'' itself and protrudes outward.