JPS647683B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention mainly relates to an improvement in a branch line attachment fitting for fixing and holding a branch line supporting a television antenna installed on the roof of a wooden house to the eaves, gables, etc. of the house.

Regarding the above-mentioned branch line mounting bracket, a single round steel material applied by the present applicant is bent almost at right angles at the intermediate position to form a horizontal arm and an upright support rod. The distance is longer than the distance from the board surface etc. to the edge of the roof, so that the hook at the tip of the upright support rod is located above the roof, and a reinforcing material to resist the load of the branch line is attached to the bent part to attach it to the hook. A branch line mounting bracket having a structure in which a branch line is hung and the tip of the arm is fixed to an eaves board, gable board, etc. has been provided and put into practical use. Conventionally, to support an antenna on a roof, a branch line was fixed to a gable board with nails, so the branch line that connects the antenna came into contact with the edge of the roof tile or rain gutter, causing the roof tile to float during strong winds. Although there were drawbacks such as concave rain gutters, these drawbacks could be overcome by the above-mentioned idea of positioning the hooks of the branch lines above the roof, and roof tiles using antenna branch wires,
Although the purpose of preventing damage to the rain gutter has been achieved, the branch line mounting bracket of the above structure uses reinforcing material to secure the arm and support rod, making the branch line taut, so if the wind hits the branch line, it will cut the wind. After using it for a certain period of time, it was discovered that it is noisy and makes a loud whistling sound when the wind is strong, and that it has the disadvantage that the branch wires stretch due to wind pressure, causing the branch wires to sag. The present invention has been devised to take advantage of the advantages of the previous invention and to eliminate the above-mentioned drawbacks.The present invention provides spring properties (elasticity) to the branch line mounting bracket, absorbs changes in the branch line load and vibrations of the branch line with the spring, It is an object of the present invention to provide a branch line mounting bracket that prevents the load on the branch line from increasing beyond a certain level.

The present invention will be explained below with reference to illustrated embodiments. 1st
The figure shows a front view of the present invention. Reference numeral 1 indicates a support rod, and the tip thereof has a hook 5 on which a branch wire 8 is hung. Reference numeral 2 denotes an arm whose tip is cut and fixed to a mounting plate 3 that is fixed to the eaves board 7 of a house, etc., and fixed with 3', etc., and between the support rod 1 and the arm 2, a round steel material is inserted at least once. After passing through the annularly wound portion 4, the support rod and the arm are bent to form an angle of approximately 90 degrees.

The length of the arm up to the mounting plate 3 is slightly longer than the distance from the surface of the eave board 7 etc. to the tip of the roof 6 so that the support rod 1 is located outside the tip of the roof, and the hook 5 of the support rod It is the same as the previous invention that the length of the support rod is appropriately selected so that the material is located above the roof, and the winding part 4, which winds the material one or more times, is placed between the support rod and the arm. This gives the support rod the elasticity of a torsion spring or coil spring.

The winding part 4 has two types, left-handed and right-handed, depending on the winding method. Figure 1 shows the left-handed winding, Figure 2 is a plan view of Figure 1, and Figure 3 shows the right-handed winding. It shows a plan view.

When supporting an antenna on the roof, four mounting brackets are usually used, and support wires are used to surround the antenna from all sides, but two sets each of left-handed and right-handed brackets are used. The left-handed and right-handed mounting brackets are arranged so that the support rod 1 is always in contact with the wound portion 4 under the same tension as the branch line.

When the mounting bracket is arranged in this way, the support rod 1 is moved in the load direction by the load received by the branch line due to the elasticity of the winding part 4 as a torsion spring or a coil spring with respect to the arm 2 fixed to the eave board etc. The four branch lines are automatically adjusted to release the load applied to the branch line by displacement and to prevent loads above a certain level from being applied to the branch line.

In the present invention, since the elastic winding part 4 is interposed between the support rod and the arm, when the branch line receives wind, the winding part acts as a torsion spring or as a coil depending on the direction of the wind. Acts as a spring and displaces the support rod in the direction of the load to release the load applied to the branch line, and adjusts so that the tension p does not exceed a certain level on the branch line.
The vibrations generated in the branch line are absorbed by the elasticity of the winding part, preventing the branch line from generating vibration frequencies that produce sound, thereby eliminating the sound of cutting wind even in strong winds. Furthermore, since the tension is automatically adjusted so as not to apply more than a certain level of tension to the branch wire, it is possible to prevent the branch wire from stretching and sagging.

As explained above, the present invention is characterized in that an elastic winding part is interposed between the support rod and the arm, thereby preventing the noise generated by the branch line or eliminating the slack of the branch line. As a result, in addition to the original purpose of the branch line mounting bracket, which was to prevent damage to the house, it also had the added effect of eliminating the disadvantages of use.

Incidentally, there is a known wire fixing fitting in which a U-shaped curved part is formed in the middle of the arm part, and the hook part is displaced by elastic deformation of the U-shaped curved part in response to changes in the tension of the wire. −14305
(No.), at least three support wires are stretched across the antenna, and as the direction and strength of the wind change, the load applied to each support wire changes. Therefore, the hook portion moves back and forth depending on the direction of the wind, and the amount of movement also changes. In the above-mentioned known technology, the hook part is displaced back and forth and repeatedly oscillates back and forth, and by centering the oscillation at almost the same point on the U-shaped curved part, it can be used for many years when used in areas with strong winds. There is a risk of damage due to metal fatigue. In the present invention, by having a winding part that is annularly wound at least once, when the direction and strength of the wind relative to the antenna change, the hook part moves in the front and rear direction and all three or more As described above, noise due to vibration is prevented by adjusting the branch line load for the wire, but the stress during swinging due to changes in the direction and amount of displacement of the hook part is U
It is not concentrated in one point like a curved part, but is dispersed, so there is no risk of metal fatigue even if used for many years in areas with strong winds. In addition, since it has a winding structure, the U
Compared to a curved structure, the elastic displacement of the hook can be larger, so even if the load on each branch wire changes due to changes in wind direction or wind force, the quick elastic displacement of the hook balances each branch wire and allows it to be adjusted to a specific branch wire. The effect of preventing the noise caused by the vibrations described above by adjusting so that the load is not concentrated and tension above a certain level not being applied due to excessive load is remarkable compared to the U-shaped curved portion of the prior art.

[Brief explanation of the drawing]

FIG. 1 is a front view of an embodiment of the present invention, and FIG. 2 is a front view of an embodiment of the present invention.
FIG. 3 is a plan view of the winding portion shown in FIG. 1 in the case of right-handed winding. 1... Support rod, 2... Arm, 3... Mounting plate, 4... Winding part, 5... Hook, 6... Roof, 7... Eave board, 8... Branch line.

Claims (1)

[Claims] 1. A branch line mounting bracket made of a single round steel material, consisting of a support rod having a branch line hook at one end and an arm having a fastening part for fixing to the eaves of a house, etc. at the other end, An antenna branch line attachment characterized in that the material is wound at least once in an annular shape between the support rod and the arm, and then bent so that the support rod and the arm form an angle of approximately 90 degrees. Metal fittings.