JPH0218565Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a roof horse used for installing an antenna on a roof.

[Conventional technology]

Generally, as shown in Fig. 5, the roof horse supports the weight of the antenna mass, antenna (not shown), etc. attached to the mast holder 31, as well as the load due to wind pressure, with the legs 33 of the leg mounting bracket 32 from which the mast holder 31 is protruded. do. Therefore, various structures have been proposed for leg mounting brackets.

For example, the roof horse (Japanese Utility Model Publication No. 57-646) shown in FIG.
5, leg mounts 36 are provided radially protruding, and the legs 33 are attached to each leg mount 36 with pins 37 so as to be openable and closable.
When the legs are opened to the maximum extent, the leg side surface 38 abuts the lower edge 40 of the inclined surface portion 39 of the leg mount 36,
A part of the upper end surface 41 of the leg is the through hole 4 of the mast holder 31.
The upper hole edge 43 of No. 2 is brought into contact with the upper hole edge 43 of No. 2. Therefore, each leg 33 supports the downward load and cross wind pressure due to the antenna etc. at the lower edge 40 of the inclined surface portion 39, the pin 37, and the through hole 42 of the mast holder 31. The roof horse shown in Figure 7 (Jikko 57-
33607), each leg 33 absorbs the downward load and cross wind pressure caused by the antenna etc.
The support is provided at the top plate 47 of the leg mount 46 which is in contact with, the pivot pin 49 which the leg 33 is pivotally connected to the leg mount 46, and the back plate 50 of the leg mount 46 which is in contact with the leg back surface 51.

[Problem that the invention attempts to solve]

However, in the case shown in FIG. 6, when the mast holder 31 receives a downward load, the leg 33 rotates in the leg opening direction, and the upper end surface 41 of the leg rotates toward the upper hole edge 43 of the through hole 42.
Since the load is not actively supported, the pin 37 and the inclined surface portion 3 are substantially separated from each other.
The downward load is supported at two locations, the lower end edge 40 of 9, and the load shared by each part increases. Moreover, the leg abutting portion of the lower edge 40 may be deformed and broken due to a large concentrated load due to the leg rotation moment.

In the case shown in FIG. 7, the upper edge 48 of the leg 33 contacts the top plate 47 of the leg mount 46 at a point. If the load is supported at such a point, the upper edge 48 will often dig into the top plate 47, making it impossible to close the legs after use, or a gap will eventually form at the biting point, making it impossible to transmit the load. There are many.
Further, in order to change the leg open state from the closed state shown by the imaginary line, a curved surface portion 52 that does not interfere with the upper edge 48 must be formed on the upper part of the back plate 50. Therefore, manufacturing the leg fixture 46 becomes troublesome and increases the number of manufacturing steps, and when molding by press, the mold becomes complicated, so the manufacturing cost increases in either case.

Furthermore, in the case shown in FIGS. 6 and 7, the leg 33 and the leg attachment 3
The relative position with 6 and 46 is easy to change. Therefore, the relative positions of the legs 33 and the leg attachments 36, 46 tend to change due to downward loads and cross wind pressure. Therefore, it is difficult for the legs 33 and the leg attachments 36, 46 to work together against downward loads and cross wind pressure.

The present invention has been made in view of the above points, and aims to provide a strong roof that can accurately support an antenna against downward loads such as antennas and cross wind pressure.

[Means for solving problems]

In order to achieve this purpose, in the roof horse of the present invention, a plurality of leg guides each having an inclined guide part for limiting the leg opening are protruded radially from the outer periphery of the mast holder. In a device that can be opened and closed, a locking member with an upper locking portion and a lower locking portion projecting in opposite directions is pivoted to the upper end of the leg, and the intermediate portion of this locking member is attached to the leg. It is attached to the guide so that it can be opened and closed, and at the maximum leg opening, the lower locking part contacts the inclined guide part of the leg guide, and the upper locking part contacts the outer circumferential surface of the mast holder. It is something to do.

[Effect]

The roof horse placed on the roof receives vertical loads from antennas, etc., as well as external forces from wind pressure.

When the leg 4 receives a downward load from an antenna or the like, it generates a rotational force in the leg opening direction, and the upper locking part 16 and the lower locking part 19 connect to the mast holder 1 and the inclined guide part 7 of the leg guide 8, respectively. Hit it even harder,
Each leg 4 is integrally connected to a leg guide 8 via a locking member 11.

Therefore, even if the roof horse is subjected to a downward load or cross wind pressure, the legs 4 can oppose the antenna together with the leg mounting bracket 5 and the mast holder 1, and can accurately support the antenna. Further, since the load is always transmitted to the locking member 11 pivoted on the leg 4 over a wide surface, the contact surface pressure can be small, and the load can be supported with sufficient margin.

〔Example〕

Embodiments of the present invention will be described based on the drawings. 1st
4, 1 is a mast holder that supports the inserted antenna mast 2 with a support rod 3 at the bottom and is fixed with a fixing screw (not shown), 4 is a leg, and 5 is a cylindrical body part 6. This is a leg mounting bracket in which a leg guide 8 having an inclined guide part 7 for limiting the leg opening angle is protruded radially.The cylindrical body part 6 is inserted into the outer circumferential surface part 9 of the mast holder 1, and the mast holder is attached with a rivet or other connector 10. Integrally connect to 1.

The leg guide 8 consists of an inclined guide part 7 and side walls 14 connected to both sides of the inclined guide part 7, and a locking member 1 fitted therein.
1 and the leg 4 fitted into the downwardly opening hole 12 formed in the locking member 11.
A through hole 22 and both side walls 14 bored in the middle and leg 4 of
It is attached so that it can be opened and closed using a support shaft 13 that is inserted through the through hole 23 of the main body.

The locking member 11 is an upper locking portion 1 having a concave curved surface portion 15 along the outer circumferential surface portion 9 of the mast holder 1.
6 and the concave curved surface part 1 forming the inner surface of the inclined guide part 7
The lower locking portion 1 has a curved surface portion 18 along the curve 7.
9 project in opposite directions, and a through hole 22 through which the support shaft 13 is inserted is provided at the boundary between the upper locking part 16 and the lower locking part 19. The part 19 is separated from the inclined guide part 7, and the upper locking part 16 has only the lower end 20 of the concave curved part 15 lightly touching the outer peripheral surface part 9 of the mast holder 1, or leaving a slight gap, and when the legs 4 are opened to the maximum, the lower part The curved surface portion 18 of the locking portion 19 is in full contact with the concave curved surface portion 17 of the inclined guide portion 7, and the concave curved surface portion 15 of the upper locking portion 16 is in full contact with the outer peripheral surface portion 9 of the mast holder 1. This locking member 11 can be mass-produced as a precision die-cast aluminum casting. The locking member may be made of hard synthetic resin or other suitable material.

When the legs 4 in the closed state are fully opened, the legs are prevented from returning in the closed direction by a stopper 21 that slightly protrudes from the inner wall of the side wall 14. When an antenna is attached to a roof horse installed on a roof via an antenna mast 2, the legs 4 of the roof horse are subjected to wind pressure in addition to the weight of the antenna and the antenna mast. These loads are transmitted from the upper locking portion 16 to the leg 4 via the mast holder 1, and from the lower locking portion 19 and the support shaft 13 to the leg 4 via the mast holder 1 and the leg mounting bracket 5.

When the spread legs 4 receive a downward load, they try to rotate in the direction of opening the legs, so the concave curved surface 15 of the upper locking portion 16 strongly contacts the outer peripheral surface 9 of the mast holder 1, and the lower locking portion The curved surface portion 18 of the leg guide 8 strongly contacts the inclined guide portion 7 of the leg guide 8, and the leg 4
is integrally connected to the leg mounting bracket 5 and the mast holder 1 via the locking member 11.

Therefore, the legs 4, together with the leg mounting fittings 5 and the mast holder 1, resist downward loads and cross wind pressures caused by antennas and the like. And mast holder 1
By sharing the load between the concave curved surface portion 15, the curved surface portion 18, and the support shaft 13 of the locking member 11, the shared load on the pressure receiving portion is reduced. Since the surface portion can be made sufficiently wide, the load per unit area becomes extremely small, and the pressure-receiving portion does not undergo deformation or damage, resulting in a highly durable structure.

It should be noted that the present invention is not limited to the embodiments described above, and can be modified in various ways within the scope of the gist. For example, the leg guide 8 may be provided directly on the mast holder 1, or the leg 4 may be provided through the locking member 11. In this case, it is preferable to cover the top surface of the leg mounting bracket 5 to prevent rainwater from flowing into the legs.

[Effect of idea]

As explained above, according to the present invention, when the legs receive a downward load from an antenna or the like, they generate a rotational force in the leg opening direction and are integrally connected to the mast holder and leg attachment via the locking member, so that The antenna can be accurately supported even when subjected to downward loads and cross wind pressure. In addition, since the legs always support the load on the wide surface of the locking member, the contact surface pressure is small.
It can support the load with sufficient margin. Therefore, the roof horse can be made strong and reliable.

[Brief explanation of the drawing]

Figure 1 is a partially cutaway, partially sectional front view of the embodiment of the present invention when the legs are open, Figure 2 is a partially cutaway sectional view when the legs are closed, and Figure 3 is a part of the legs and the legs. Figure 4 is a perspective view of the left half of the leg mounting bracket, Figure 5 is a front view of a general roof horse, Figures 6 and 7 are partial cutouts of the conventional product. FIG. 3 is a partially sectional front view. DESCRIPTION OF SYMBOLS 1... Mast holder, 4... Leg, 7... Inclined guide part, 8... Leg guide, 11... Locking member, 16
... Upper locking part, 19... Lower locking part.

Claims (1)

[Scope of utility model registration request] In the mast holder 1, a plurality of leg guides 8 having inclined guide portions 7 for limiting the leg opening are protruded radially from the outer periphery of the mast holder 1, and the legs 4 are attached to each leg guide 8 so as to be openable and closable. A locking member 11 having an upper locking portion 16 and a lower locking portion 19 projecting in opposite directions is pivoted to the upper end of the locking member 11, and the intermediate portion of the locking member 11 is opened and closed on the leg guide 8. The lower locking part 19 and the upper locking part 16 contact the inclined guide part 7 of the leg guide 8 and the outer circumferential surface of the mast holder 1 respectively at the maximum leg opening. A roof horse.