JPH0429005Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Field of Industrial Application) The present invention relates to an improvement of a sparrow-proof plate for a utility pole arm.

(Prior art) A sparrow-proof plate for a utility pole arm is, for example, 75cm x 75cm x
If you leave the openings at both ends of utility pole arms, which are hollow prismatic members of about 1,500 to 1,800 mm, open, small birds such as sparrows and snakes will get in, often causing power transmission accidents. It is necessary to close the opening to prevent such damage, and the following conventional techniques exist.

The first method is to directly weld and fix the sparrow-proof plate to the openings at both ends of the arm arm, and has been practiced for the longest time.

The second reason is the invention technology of Utility Model Registration No. 837774 owned by the applicant for utility model registration. After inserting the sparrow-proof plate with an octagonal shape in an oblique position,
As the sparrow-proof plate was forcefully rotated to an upright position, the upper and lower protrusions of the sparrow-proof plate were fitted into the mounting holes and fixed.

(Problems to be solved by the invention) The above conventional techniques have the following problems. That is, in "No. 1" of the above-mentioned conventional technology, the cross arm is a steel plate, and the sparrow-proof plate is fixed by welding and galvanized, but the welded part is likely to have poor plating. Since the welding work is troublesome, it is not suitable for mass production and requires the use of dangerous flames.

In "Part 2" of the same book, although it is strongly fitted, the sparrow-proof plate often comes off when an unexpected external force is applied, such as dropping the armrest on the ground or hitting it with a hammer. There was a problem.

(Means for solving the problems) Therefore, the present invention takes the following measures to solve the above problems.

That is, the structure of the sparrow-proof plate 4 is improved and combined with the mounting holes 3 of the armrest body 1.

The sparrow-proof plate 4 has a ``dog''-shaped bent position when viewed from above, and is transformed into a smooth plate and fixed to the mounting holes 3, 3 of the opening 2 of the arm arm main body 1. This provides a configuration to obtain the desired results.

A pair of protrusions 6, 6 that can be fitted into the mounting holes 3, 3 are integrally formed at both left and right ends of a rectangular metal plate 5 that is large enough to fit into the inner space of the opening 2 of the arm arm main body 1. The formed rectangular metal plate 5 has a central bent part 7 in the width direction, and a pair of Daruma-shaped operating holes 10, 10 are punched out in the left and right partition parts 8, 9. The metal plate 5 in the form of a plate is slightly bent into a "dog" shape at the central bending part 7, so that the entire width including the protrusions 6, 6 is formed within the width of the openings 2, 2. The present invention provides a devised technology characterized by the following.

EXAMPLES Examples that provide the best results for carrying out the gist of the present invention are disclosed below.

Reference numeral 1 denotes the main body of a utility pole cross arm, and 2 denotes openings at both ends thereof. 3, 3 is a pair of left and right slit-shaped mounting holes drilled near the opening, 4 is a sparrow-proof plate, and before installation, it has a bent position in a "dog" shape when viewed from above, As shown in Fig. 1, the arm arm main body 1
The shape of the front surface after being transformed into a smooth plate state is explained with reference to FIG. 1. A pair of protrusions 6, 6 that can be fitted into the mounting holes 3, 3 are integrally formed on both left and right ends of the rectangular metal plate 5.

The rectangular metal plate 5 has a width that can fit into the smooth plate state, for example, the openings 2 at both ends of the arm arm main body 1.
An imaginary circle with a width that fits the full width of the inner cavity, a width that allows it to fit loosely at the top and bottom, a central bend 7 in the width direction, and the center O of the left and right partitions 8 and 9 as the fulcrum. A pair of daruma-shaped operating holes 10, 10 are punched out at the intersection of K and the horizontal line S. The operating holes 10, 10 are a large diameter hole 11 and a small diameter hole 12.
It has a configuration in which the
It is formed into an symmetrical shape using the fulcrum as the fulcrum.

Reference numerals 13 and 13 are a pair of notches that are slightly cut in width from both the upper and lower ends of the central bent portion 7 in corresponding directions, and by processing the area of the central bent portion 7 to a small size, the deformation operation is simplified. This is for the purpose of reducing and reducing the risk. Reference numeral 14 designates chamfered portions at each corner of the rectangular metal plate 5. The structural features other than the cutout portion 13 and the chamfered portion 14 are essential for the metal plate 5 in a smooth plate state, and the protrusions 6, 6 are slightly bent in a “dog” shape at the central bending portion 7. This is characterized in that the entire width including the openings 2, 2 is formed within the width of the openings 2, 2.

The metal plate 5 in this “dog”-shaped slightly bent position is shown in FIG.
Do this using 5.

Although the structure of the metal plate bending tool 15 does not particularly specify the mechanism, for example, the following mechanism can be used.

That is, the lower end of the extrusion shaft 20, which is inserted into the center hole of the U-shaped substrate 16, leaving the extrusion head 21, is inserted into the strip-like bracket 17, which is vertically disposed at the center of the front surface of the substrate 16. Among the two-stage elongated holes,
It is fixed to the upper vertically elongated hole 18 with a pin 22 so as to be movable up and down. The lower vertical hole 19 has operating levers 24 and 25.
Overlapping arm portions 26, 2 integrally protruding from the upper end corresponding surface
7 through which the pivot shaft 23 is inserted, it is possible to move up and down within the range of the elongated hole 19. 30, 31 are operating levers 2
4 and 25 and the substrate 16, and are connected by pins 28, 29, 32, and 33, respectively.

34 and 36 are pins 3 attached to the left and right ends of the board 16.
8 and 39, which are pivoting shafts that are pivoted so as to be swingable, and the respective hooking heads 35 and 37 are hooked into the operating holes 10 and 10 in the sparrow-proof plate 4. .

By rotating the heads 35 and 37 clockwise after passing through the large diameter holes 11, respectively,
The heads 35, 37 are securely latched to the small diameter hole 12, resulting in the state shown in FIG. 2.

Although not shown in FIG. 2, the pin 22 and pivot 23, which are vertically movably supported in the two-stage elongated holes 18 and 19 of the bracket 17, are connected to a separate connecting plate on the back so that they can move together. connected.

(Function) Before installation, the sparrow-proof plate 4 has a bent position in a “dog” shape when viewed from above, and the metal plate 5 is in a smooth plate state.
is provided in a state in which it is slightly bent in a "dog" shape at the central bending part 7, and the entire width including the protrusions 6, 6 is formed within the width of the openings 2, 2. The metal plate 5 in this “dog”-shaped slightly bent position is shown in FIG. This is done using 15.

The action is that when the operating levers 24, 25 are first fully opened, the pins 22 and pivots 23 of the two-stage vertically elongated holes 18, 19 in the bracket 17 move to the lowest ends of both elongated holes. The extrusion shaft 20 is connected to the substrate 16
The head 21 of the extrusion shaft 20 is in a state farthest away from the heads 35, 37 of the attraction shafts 34, 36. In this state, the hook heads 35, 3 of the pull shafts 34, 36
7 into the actuating holes 10, 10 of the sparrow prevention plate 4, and then gently close the operation levers 24, 25 in the corresponding directions to close the sparrow prevention plate 4 in the bent position. FIG. 2 shows a posture in which the extrusion abutment surface 21a of the extrusion shaft head 21 is in contact with the central bent portion 7 of the plate 4. Insert the mounting hole 3, 3 in the opening 2 in that position.
When it reaches the corresponding position inside the
5. Gently close again. This metal plate bending tool 15
Due to the closing operation, the distance between the operating levers 24, 25 and the base plate 16 remains unchanged because they are integrally connected, but the extrusion shaft 20 is connected to the pivot shaft 23, which moves upward as the overlapping arms 26, 27 rotate upward. , by the pin 22 that moves integrally with the pivot 23, the hooking heads 35, 37
The extrusion abutment surface 21a of the extrusion shaft head 21 moves forward while attracting the attraction shafts 34 and 36 which are latched to prevent them from coming off, thereby deforming the sparrow prevention plate 4 into a smooth plate state.

Along with this deformation work, the left and right protrusions 6, 6 fit into the mounting holes 3, 3 from the inside, and the sparrow-proof plate 4 is fixedly attached to the mounting holes 3, 3 of the arm arm main body 1 as shown in Fig. 3. do. Therefore, when the operating levers 24 and 25 of the metal plate bending tool 15 are fully closed,
It is convenient to set the sparrow-proof plate 4 so that it is a smooth plate.

(Effects) Since the present invention has the above configuration, it has the following effects unique to the present invention.

That is, on both left and right ends of a rectangular metal plate 5 that is large enough to fit into the inner space of the opening 2 of the arm arm main body 1,
a pair of projections 6 that can fit into and engage the mounting holes 3;
In the rectangular metal plate 5 integrally formed with 6,
This smooth metal plate 5 has a central bent part 7 in the width direction, and has a pair of Daruma-shaped operating holes 10, 10 formed in its left and right partition parts 8, 9 by punching.
is slightly bent into a "dog" shape at the central bending part 7, so that the entire width including the protrusions 6, 6 is formed within the width of the openings 2, 2. When viewed from above, it has a "dog"-shaped bent position, and as it is transformed into a smooth plate state in the mounting holes 3, 3 of the opening 2 of the arm arm main body 1, the protrusion 6 , 6 are fitted into the mounting holes 3, 3, and can be fixedly attached.
If you use a deformation tool such as the metal plate bending tool 15, it can be installed and fixed with one touch, and there is no need for a welding process, so there is no need to worry about poor plating.
The poor work efficiency and danger of using fire due to welding work are eliminated at once, and the welding process is safe, quick, and easy to install, and work efficiency is greatly improved. For example, after completing the plating process, it is possible to attach the arms 1 of the same shape to the openings 2 of about 50 pieces delivered in a bundled state. In addition, the sparrow prevention plate 4 of the present invention will not come off unless it is bent into a “dog” shape again, so the mounting structure of the sparrow prevention plate 4 is extremely strong and has many beneficial effects. It is an idea.

The operating holes 10, 10 are provided at the intersection of the imaginary circle K and the horizontal line S as an example, but the attraction shafts 34, 36 are configured to be swingable as shown in the metal plate bending tool 15. If so, there is no problem even if it is not a circular motion.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway front view of the sparrow-proof plate 4 in its installed state, Fig. 2 is a cross-sectional view taken along line A-A in Fig. 1 showing its installation using the same metal plate bending tool 15, and Fig. 3 is its installed state. The same figure and FIG. 4 are side views of the same. 1... Bracelet body, 2... Openings at both ends, 3... Mounting hole, 4... Sparrowproof plate, 5... Metal plate, 6... Protrusion, 7... Center bent part, 8, 9 ...Left and right compartments,
10... Working hole, 11... Large diameter hole, 12... Small diameter hole, 13... Notch, 14... Chamfered part, 15...
... Metal plate bending tool, 16 ... U-shaped board, 17
... Bracket, 18, 19 ... Vertical hole, 20 ...
... Extrusion shaft, 21 ... Extrusion shaft head, 21a ... Extrusion contact surface, 22 ... Pin, 23 ... Pivot, 24, 2
5... Operating lever, 26, 27... Overlapping arm portion, 2
8, 29...Pin, 30, 31...Link, 3
2, 33... Pin, 34, 36... Attraction shaft, 3
5, 37...Hook head, 38, 39...Pin, K...Virtual circle, S...Horizontal line.

Claims (1)

[Scope of utility model registration request] A pair of protrusions 6, 6 that can be fitted into the mounting holes 3, 3 are integrally formed at both left and right ends of a rectangular metal plate 5 that is large enough to fit into the inner space of the opening 2 of the arm arm main body 1. The formed rectangular metal plate 5 has a central bent part 7 in the width direction, and a pair of Daruma-shaped operating holes 10, 10 are punched out in the left and right partition parts 8, 9. The metal plate 5 in the form of a plate is slightly bent into a "dog" shape at the central bending part 7, so that the entire width including the protrusions 6, 6 is formed within the width of the openings 2, 2. A sparrow-proof plate for utility pole arms featuring: