JPS646575Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a mast device for an antenna.

As shown in FIG. 1, a conventional antenna mast device has a cylindrical body 3 erected in the center of a square substrate 2 with an anchor bolt insertion hole 1 bored in its outer periphery. The upper and lower ends of the reinforcing stay 4 are fixed to the upper outer periphery and the base surface by welding, the mast 5 is fitted into the cylinder 3, and the mast is attached to the tip of the mounting bolt 6 screwed onto the outer peripheral surface of the cylinder 3. The outer peripheral surface of No. 5 was pressed and fixed. In such an antenna mast device, the cylindrical body 3 and the reinforcing stay 4 are fixed to the substrate 2 by welding, so that the packaging volume is large. Further, the substrate 2 has a large weight due to the need to maintain its strength. Furthermore, the mast 5 has a mounting bolt 6 screwed onto the outer periphery of the cylinder body 3.
Since the antenna is pressed and fixed at the tip thereof, when the antenna vibrates due to wind, the tip of the mounting bolt 6 loosens, changing the direction of the antenna and changing the antenna characteristics.

Therefore, in view of the above circumstances, the present invention aims to reduce the packaging size and weight by transporting the antenna mast device in a disassembled state to the installation site so that it can be assembled at the installation site. By eliminating the board and integrating the stay plate and mast by inserting and screwing bolts, the strength of the antenna mast device is increased and the antenna direction is prevented from changing due to wind vibrations. .

In order to achieve the above object, the present invention forms one reinforcing plate part and the other reinforcing plate part at right angles through a connecting part along the outer peripheral surface of the mast, and connects the reinforcing plate part to the lower end of the reinforcing plate. Installing mounting pieces bent at right angles,
Two stay plates of the same shape with anchor bolt insertion holes drilled in the mounting pieces are brought into contact with the connecting portion at the lower end of the mast, and the two stay plates are arranged to face the outer periphery of the mast. This antenna mast device is characterized in that a bolt is passed through two stay plates and the mast and screwed into the antenna mast device.

Hereinafter, the present invention will be explained in detail based on specific embodiments shown in FIGS. 2 to 6. Stay plate 7
As shown in FIG. 2, one reinforcing plate part 8 and the other reinforcing plate part 8 are made of thin sheet metal members and are connected in an arc shape of about 1/4 along the outer peripheral surface of the cylindrical mast 9. It is formed in a right-angled shape via the connecting portion 10 of. The reinforcing plate parts 8, 8' are triangular in shape and are formed obliquely outward from above the connecting part 10, and the lower ends of each are bent at right angles to form horizontal mounting pieces 11, 11'. Two anchor bolt insertion holes 12, 12' of the same shape are formed in each of the mounting pieces 11, 11'. Two of the stay plates 7 formed in this manner are placed facing each other with the mast 9 interposed therebetween, as shown in FIGS. 3 and 4. That is,
The connecting part 10 is brought into contact with the lower end of the mast 9, and the anchor bolt insertion holes 12, 12 of the mounting pieces 11, 11'
and 12', 12' are linear, reinforcing plates 8,
8' is another reinforcing plate part 8 of the stay plate 7,
Arrange it so that it is parallel to 8'. This means that one stay plate 7 is connected to the other stay plate 7 by the mast 9.
The relationship is that they are moved 180° along the outer circumferential surface. With the stay plate 7 arranged in this way, the mounting bolt 13 is inserted into the anchor bolt insertion hole 1 in parallel to the reinforcing plate parts 8, 8.
The mast 9 is inserted through the attachment hole 20 of one of the stay plates 7 on the line connecting 2 and 12, and is further inserted through the attachment hole 20 of the other stay plate 7, and then screwed with the nut 14.

Next, anchor bolts are inserted into anchor bolt insertion holes 12 and 12' formed in the mounting pieces 11 and 11', respectively, and screwed with nuts to fix the device.

When fixing this device, please refer to Figures 5 and 6.
As shown in the example, it is also possible to use a foundation on which anchor bolts are erected in advance. A foundation metal fitting 18 having an erected anchor bolt 17 is stretched orthogonally on the surface side of a concrete base 16 in which an anchor 15 is buried. Reference numeral 19 indicates bolts and nuts for attaching the base metal fittings.

As described above, the present invention forms one reinforcing plate part and the other reinforcing plate part at right angles through a connecting part along the outer peripheral surface of the mast, and bends the reinforcing plate part at right angles to the lower end of the reinforcing plate. Two stay plates of the same shape with attached mounting pieces arranged in series and with anchor bolt insertion holes drilled in the mounting pieces are brought into contact with the connecting part at the lower end of the mast, and the two stay plates are attached to the mast. Since this is an antenna mast device that is arranged so as to face the outer periphery of the two stay plates and is screwed through the two stay plates and the mast, there is no need for the stay plate and the mast to be installed. Since the mast can be disassembled and transported, the packaging size can be reduced. Further, unlike the conventional antenna mast device, there is no need to use a heavy board, so the weight can be reduced. In addition, since the stay plate and the mast can be fixed together by inserting and screwing bolts, the strength is increased, and since the mast is not pressed by the tip of the mounting bolt as in the case of conventional methods, vibrations caused by wind etc. The antenna direction will not change and the antenna characteristics will not deteriorate. Furthermore, the bolts that attach the stay plate to the mast are positioned parallel to the stay plate, making assembly easy.

Since the present invention uses two stay plates of the same shape to support the mast, only parts of the same shape need be manufactured, which reduces production costs, makes production efficient, and facilitates inventory management. Become. Furthermore, since the bolt is screwed through the two stay plates and the mast, the antenna mast can be firmly supported.

[Brief explanation of the drawing]

Fig. 1 is a perspective view of a conventional antenna mast device, Fig. 2 is a perspective view of a stay plate of the present invention, Fig. 3 is a front view of a specific embodiment of the present invention, and Fig. 4 is a perspective view of the present invention. FIG. 5 is a longitudinal sectional view of a concrete base with anchor bolts erected in advance, and FIG. 6 is a plan view of FIG. 5. 8, 8'...Reinforcement plate part, 9...Mast, 10...
...Connection part, 11, 11'...Mounting piece, 12, 1
2'...Anchor bolt insertion hole.

Claims (1)

[Scope of utility model registration request] One reinforcing plate part and the other reinforcing plate part are formed in a right-angled shape through a connecting part along the outer circumferential surface of the mast, and a mounting piece bent at right angles is connected to the lower end of the reinforcing plate to attach the reinforcing plate part. Two stay plates of the same shape with anchor bolt insertion holes drilled in each piece are brought into contact with the connection part at the lower end of the mast, and the two stay plates are placed opposite to the outer periphery of the mast to tighten the bolts. An antenna mast device in which two stay plates and a mast are passed through and screwed together.