Wrist Gold

Abstract

To provide a cross arm for erecting an electric wire capable of preventing nesting of birds.SOLUTION: A cross arm includes a cross arm body 1 and a bird intrusion prevention member 2. The cross arm body 1 is made of an aluminum profile, and includes a locked portion 3 of the bird intrusion prevention member 2 at the end in the longitudinal direction. The bird intrusion prevention member 2 is fixed to the cross arm body 1 by elastically locking locking portions 4 provided at both ends to the locked portion 3 from the inside or outside of the cross arm body 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to an arm for mounting on a utility pole. [Background technology]

[0002] Electric poles are fitted with cross arms to support electric wires. Conventionally, cross arms have been made of square steel pipes, which have the problem of allowing birds to enter through the ends and build nests inside. Summary of the Invention [Problem to be solved by the invention]

[0003] SUMMARY OF THE PRESENT EMBODIMENT In view of the above-mentioned circumstances, an object of the present invention is to provide an arm rest capable of preventing birds from building nests. [Means for solving the problem]

[0004] In order to achieve the above object, the arm according to the invention described in claim 1 comprises an arm body and a bird-intrusion prevention member, the arm body being formed from an aluminum profile and having a locking portion for the bird-intrusion prevention member at its longitudinal end, and the bird-intrusion prevention member is fixed to the arm body by resiliently locking the locking portions provided at both ends to the locking portions from the inside or outside of the arm body. Effect of the Invention

[0006] The arm according to the invention described in claim 1 comprises an arm body and a bird-intrusion prevention member, the arm body being formed from an aluminum profile and having a locking portion for the bird-intrusion prevention member at its longitudinal end, and the locking portions provided at both ends of the bird-intrusion prevention member are resiliently locked to the locking portion from the inside or outside of the arm body to be fixed to the arm body, thereby preventing birds from building nests. The bird-intrusion prevention member can be easily attached without using tools, etc., and there is no need to worry about it coming off. [Brief description of the drawings]

[0008] [Figure 1]1 is an enlarged perspective view of the end of the arm of the first embodiment, in which (a) shows the state before the bird intrusion prevention member is attached to the arm body, and (b) shows the state after the bird intrusion prevention member is attached to the arm body. FIG. [Diagram 2] FIG. 2 is a perspective view of the bracket of the first embodiment. [Diagram 3] 11 is an enlarged perspective view of the end of the arm of the second embodiment, where (a) shows the state before the bird intrusion prevention member is attached to the arm body, and (b) shows the state after the bird intrusion prevention member is attached to the arm body. [Figure 4] 13 is an enlarged perspective view of the end of the arm of the third embodiment, in which (a) shows the state before the bird intrusion prevention member is attached to the arm body, and (b) shows the state after the bird intrusion prevention member is attached to the arm body. [Diagram 5] 11A and 11B are a side view and a longitudinal sectional view of an arm of a third embodiment, in which (a) shows a state before the arm body is crimped, and (b) shows a state after the arm body has been crimped. [Figure 6] 13 is an enlarged perspective view of the end of the arm of the fourth embodiment, where (a) shows the state before the bird intrusion prevention member is attached to the arm body, and (b) shows the state after the bird intrusion prevention member is attached to the arm body. [Figure 7] 13A and 13B are a side view and a longitudinal sectional view of an arm of a fourth embodiment, in which (a) shows a state before the arm body is crimped, and (b) shows a state after the arm body has been crimped. [Figure 8] FIG. 13 is a side view of the bracket of the fifth embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Figures 1 and 2 show a first embodiment of an arm of the present invention. As shown in Figure 2, this arm comprises an arm body 1 and bird prevention members 2 attached to both ends of the arm body 1 in the longitudinal direction.

[0010] The cross arm body 1 is made of an extruded aluminum alloy material, and as shown in Figures 1 and 2, is tubular with a square cross section having an upper wall 5, a lower wall 6, and a pair of side walls 7, 7. The cross arm body 1 has slits 3 formed in the upper wall 5 and lower wall 6 at both longitudinal ends thereof, which serve as latching portions for the bird intrusion prevention members 2, and which extend in a direction intersecting the longitudinal direction. The side walls 7, 7 of the cross arm body 1 are formed with elongated holes 10 through which bolts 9 for fixing the cross arm body 1 to a utility pole 8 are inserted. The cross arm body 1 also has mounting holes appropriately formed for mounting devices (not shown) such as insulators that receive electric wires.

[0011] The bird prevention member 2 is formed by cutting an aluminum profile to a specified length, and as shown in Figure 1(a), it has inclined portions 11, 11 at the top and bottom which are inclined toward the outside in the longitudinal direction of the arm body 1, and engagement portions 4, 4 are provided at the tip of each inclined portion 11, 11 so as to protrude in the vertical direction. When this bird prevention member is pushed into hollow portion 12 from the opening of arm body 1, as shown by the arrow in Figure 1(a), the upper and lower inclined portions 11, 11 elastically deform so as to bend inward, and then the engagement portions 4, 4 at the upper and lower ends resiliently engage with the slits 3 in the arm body 1, and are fixed to the arm body 1 as shown in Figure 1(b). By attaching bird prevention members 2 to both ends of arm body 1 in this manner, this arm can prevent birds from entering hollow portion 12 of arm body 1 and building nests.

[0012] This arm is fixed to the utility pole 8 with a band 13 wrapped around the pole 8, bolts 9, 9, and nuts 14, 14, as in the conventional case (see Figure 2). Since the arm body 1 of this arm is made of lightweight aluminum material, it is easy to install it on the utility pole 8.

[0013] Figure 3 shows a second embodiment of the arm of the present invention, which differs from the first embodiment in the shape of the bird intrusion prevention member 2. As shown in Figure 3(a), the bird intrusion prevention member 2 is formed in a roughly U-shape having upper and lower horizontal walls 15, 15 and a vertical wall 16, with the locking portion 4 formed downward at the tip of the upper horizontal wall 15 and the locking portion 4 formed upward at the tip of the lower horizontal wall 15. When this bird prevention member 2 is pushed onto the end of the arm body 1 from the outside, as shown by the arrow in Figure 3(a), the upper and lower side walls 15, 15 elastically deform so as to bend outward, and then the locking portions 4, 4 at their tips resiliently lock into the slits 3 in the arm body 1, and are fixed to the arm body 1 as shown in Figure 3(b).

[0014] 4 and 5 show a third embodiment of the arm of the present invention. As shown in Fig. 4(a), the bird intrusion prevention member 2 is a rectangular plate. The bird intrusion prevention member 2 has a vertical dimension that is approximately the same as the vertical dimension of the hollow portion 12 of the arm body 1, and a lateral dimension that is smaller than the lateral dimension of the hollow portion 12 of the arm body 1. In the arm of this embodiment, as shown in Fig. 4, the bird intrusion prevention member 2 is inserted into the hollow portion 12 from the small end of the arm body 1, and pressed and crimped from above and below with a press machine 17. At that time, by pressing through a pressing part 22 with a pointed tip as shown in Fig. 5(a), the pressed parts of the upper wall 5 and lower wall 6 of the arm body 1 are plastically deformed so as to bulge inward as shown in Fig. 5(b), and the bird intrusion prevention member 2 is gripped from above and below, and accordingly the bird intrusion prevention member 2 is fixed to the arm body 1.

[0015] 6 and 7 show a fourth embodiment of the arm of the present invention. The bird intrusion prevention member 2 is made of an aluminum profile, and as shown in Fig. 6(a), has a section 22 with an X-shaped cross section located diagonally in the hollow section 12 of the arm body 1, and the tips of each radially extending side abut against the corners of the hollow section 12 of the arm body 1. In the arm of this embodiment, as shown in Fig. 6, the bird intrusion prevention member 2 is inserted into the hollow portion 12 from the small end of the arm body 1, and pressed and crimped from above and below with a press machine 17. At this time, as shown in Fig. 7(a), by pressing through a pressing part 22 with a pointed tip, the pressed parts of the upper wall 5 and the lower wall 6 of the arm body 1 are plastically deformed to bulge inward as shown in Fig. 7(b), and the bird intrusion prevention member 2 is gripped from above and below, and accordingly the bird intrusion prevention member 2 is fixed to the arm body 1. The bird intrusion prevention member 2 has an X-shaped section 22, and the tips of each side of the X-shaped section 22 abut against the corners of the hollow portion 12 of the arm body 1, respectively, so that the position of the bird intrusion prevention member 2 is stable when inserted into the hollow portion 12 of the arm body 1, and therefore the fixing by crimping can be performed efficiently.

[0016] 8 shows a fifth embodiment of the arm of the present invention. The bird intrusion prevention member 2 has an X-shaped section 22 similar to that of the fourth embodiment, and in addition, fin pieces 23 are provided between the diagonal pieces of the X-shaped section 22. A gap 24 is provided between the tip of each fin piece 23 and the arm body 1. The arm of this embodiment has an X-shaped cross-section portion 22 in the bird intrusion prevention member 2, and the tip portions of each side of the X-shaped portion 22 abut against the corner portions of the hollow portion 12 of the arm body 1, so that, as in the fourth embodiment, the bird intrusion prevention member 2 is stable when inserted into the hollow portion 12 of the arm body 1, and therefore fixing by crimping can be performed efficiently. Furthermore, by providing fin pieces 23 between each of the diagonal pieces of the X-shaped portion 22, the hollow portion 12 of the arm body 1 is divided more finely by the bird intrusion prevention member 2, so that even if the cross section of the arm body 1 becomes large, bird intrusion can be prevented.

[0017] As described above, this arm (first and second embodiments) comprises an arm body 1 and a bird intrusion prevention member 2, the arm body 1 is formed from an aluminum profile and has the locked portions 3 of the bird intrusion prevention member 2 at its longitudinal ends, and the bird intrusion prevention member 2 is fixed to the arm body 1 by having the locking portions 4 provided at both ends resiliently lock onto the locked portions 3 from the inside or outside of the arm body 1, thereby preventing birds from building nests. The bird intrusion prevention member 2 can be easily attached without using tools or the like and there is no need to worry about it coming off. In addition, the present arm (first and second embodiments) is lighter and easier to handle than conventional steel arm because the arm body 1 is made of aluminum shaped material. Also, because it is made of aluminum shaped material, it has excellent weather resistance, so it is cost-effective because maintenance costs are kept low. The locked portion 3 of the bracket body 1 is formed in a slit shape, so that the bird intrusion prevention member 2 can be attached securely and can be easily formed by pressing.

[0018] This arm (third and fourth embodiments) comprises an arm body 1 and a bird prevention member 2, the arm body 1 being formed from an aluminum profile, and the bird prevention member 2 being inserted into the hollow portion 12 from the end of the arm body 1 and fixed to the arm body 1 by crimping from all sides, thereby preventing birds from building nests. The bird prevention member 2 can be easily attached by simply inserting it into the hollow portion 12 of the arm body 1 and crimping it from all sides, and there is no need to worry about it coming off. In addition, the present arm (third and fourth embodiments) is lighter and easier to handle than conventional steel arm bodies because the arm body 1 is made of aluminum shaped material. In addition, the aluminum shaped material has excellent weather resistance, so maintenance costs are kept low, which is cost-effective. In the cross arm of the third embodiment, the bird intrusion prevention member 2 is formed in a plate shape, so that the bird intrusion prevention member 2 can be manufactured at low cost. In the fourth and fifth embodiments of the arm, the bird intrusion prevention member 2 has an X-shaped cross-section portion 22, and the tips of each side of the X-shaped portion 22 abut against the corners of the hollow portion 12 of the arm body 1, so that the posture of the bird intrusion prevention member 2 is stable when inserted into the hollow portion 12 of the arm body 1, and fixing by crimping can be performed efficiently.

[0019] The present invention is not limited to the above-described embodiment. The cross-sectional shape of the cross arm body may be rectangular, trapezoidal, or the like. The shape and material of the bird prevention member may be changed as appropriate. Utility poles include power poles and telegraph poles. The use of the cross arm of the present invention is not particularly limited, and it may be used to install electric wires and cables, as well as to attach antennas, road signs, and the like. [Explanation of symbols]

[0020] 1 Bracket body 2. Bird prevention materials 3 Slit (engaged part) 4 Locking part

Claims

[Claim 1] The arm comprises an arm body and a bird-intrusion prevention member, the arm body being formed from an aluminum profile and having a locking portion for the bird-intrusion prevention member at one end in the longitudinal direction, and the bird-intrusion prevention member is fixed to the arm body by resiliently locking the locking portions provided at both ends to the locking portions from the inside or outside of the arm body.

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