JPH0450369Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Technical Field> The present invention relates to a fence, particularly a fence suitable for ball protection fences (back nets, etc.) in baseball stadiums and the like.

<Prior Art> As shown in FIG. 4, a conventional ball fence includes a diamond-shaped wire mesh 1 made of zigzag wires knitted together, and a cylindrical upper frame member 2 with a C-shaped cross section that engages the annular upper end of the wire mesh 1. and a cross section C that engages the annular lower end of the wire mesh 1.
A fence unit consisting of a lower frame member 3 made of a shaped cylinder, vertical tension rods 4 that engage the left and right ends of the wire mesh 1, and struts 6 that support the vertical tension rods 4 via joints 5 is constructed in multiple stages. It was warm. Note that E in the figure is a block wall erected to close the space between the bottom frame member 3 of the lowest stage of the fence and the upper surface of the foundation F.

However, if the lower end of the wire mesh 1 is simply engaged with the lower frame member 3 as described above, during baseball practice, the player may accidentally touch the lower end 1a of the wire mesh 1, that is, slightly above the lower frame member 3. (120-150cm from the ground
Since the prank of hitting the lower part 1a is often repeated, and a ball or the like also collides with the lower part 1a, the impact force at that time acts to stretch the zigzag wire A of the wire mesh 1. As a result, the lower end of the zigzag wire A gradually deforms its annular shape and comes off, and the lower part 1a of the wire mesh 1 becomes slack, resulting in a loose sail condition.

<Purpose> Therefore, the present invention aims to provide a fence reinforcing device that can prevent the lower part of the wire mesh from becoming exposed due to mischief with bats.

<Embodiment> Hereinafter, an embodiment of the present invention will be described with reference to FIGS. 1 to 3. The fence reinforcing device of the present invention includes a rhombic wire mesh 1 formed by knitting zigzag wire rods A, and the wire rods of the wire mesh 1. a cylindrical upper frame member 2 that is externally engaged with an annular upper end portion having a curled upper end portion, has a C-shaped cross section, and has an opening smaller than the annular upper end portion;
The lower end of the wire of the wire mesh 1 is externally engaged with the curled annular lower end 1b, and the cross section C
A cylindrical lower frame member 3 which is shaped like a letter and whose opening is smaller than the annular lower end portion 1b, a vertical tension bar 4 that engages the left and right ends of the wire mesh 1 in an internally fitted state, and the vertical tension bar 4 and the upper and lower frame members. 2 and 3 via joints 5, the lower half C of the second mesh B2 extends from the upper edge of the bottom frame member 3 of the lowest stage of the wire mesh 1.
(The upper half D may be used instead of this part) A horizontal reinforcing rod 7 made of steel band (a rod for preventing sail loosening of the wire mesh 1) having a rectangular cross section is inserted in an internal state, and the horizontal reinforcing rod 7 and The dimension between the lower frame member 3 and the upper edge is set in the range of 50 to 75 mm, and the left and right ends of the horizontal reinforcing rod 7, the column 6, and the vertical tensioning rod 4 are sandwiched from the front and back by a pair of reinforcing joints 8. It is connected and arranged.

Note that 9 is a connecting bolt between the horizontal reinforcing rod 7 and the F-shaped reinforcing joint 8 that sandwich this from the front and rear. Reference numeral 10 denotes a reinforcement wire made of iron wire having approximately the same diameter as the zigzag wire, and the joint 11 to the support column 6 and the reinforcing joint 8 are the same. Further, reference numeral 12 indicates a retaining line at the lower end portion 1b of the wire mesh 1.

In addition, in the cross section of the horizontal reinforcing rod 7 in Fig. 2, the width
H1 = 19 mm, thickness H2 = 6 mm, the diameter of zigzag wire A is 3.2 mm, the thickness of wire mesh 1 H3 = 15 mm, and the heights of meshes B1 and B2 of wire mesh 1 are each 50 mm.
It was hot.

As mentioned above, since the horizontal reinforcing rod 7 is fitted inside the second mesh B2, even if the lower part 1a of the wire mesh 1, that is, the slightly upper part of the horizontal reinforcing rod 7 is hit by a bat, the impact force will be absorbed. Mostly zigzag wire A
However, the horizontal reinforcing rod 7 has high rigidity and its elastic deformation is small, and the zigzag wire A in this portion has a small deformation amount. The impact force is applied through the horizontal reinforcing rods 7 to the longitudinal rods 4 at both ends.
and is transmitted to the reinforcing joint 8 and the support column 6. The force that is not transmitted to the horizontal reinforcing rod 7 is transmitted to the first mesh B1 of the wire mesh 1, but this force is weak and is almost absorbed by the elastic deformation of the zigzag wire material A of this mesh B1.
It does not become a force that deforms the lower end portion 1b.

In addition, since the horizontal reinforcing rod 7 has a rectangular cross section and high rigidity, it does not have elasticity like the wire mesh 1, and when it is hit with a bat, it can be visually determined that the bat is more likely to be damaged. Do not hit the area near stick 7 with the bat.

Furthermore, since the distance J between the horizontal reinforcing rod 7 and the lower frame member 3 is as small as 50 to 75 mm, there is no chance of hitting the rod with a bat.

If a horizontal reinforcing bar 7 with a round cross-section and high elasticity is used, when struck with a bat, it may be visually determined that the bat will not be damaged; When the lower part 1a, that is, the slightly upper part of the horizontal reinforcing rod 7 is hit with a bat, the horizontal reinforcing rod 7 has a large elasticity, so its elastic deformation is large, and the zigzag wire A in this part has a large deformation and impact force. is transmitted to the first mesh B1 of the wire mesh 1, and this force is large and gradually deforms the lower end portion 1b.

Furthermore, if we consider the case where the horizontal reinforcing rods 7 are fitted inside the first mesh B1, the elasticity of the first mesh B1 will also be reduced due to the horizontal reinforcing rods 7 having low elasticity, and the elasticity of this mesh cannot be expected. The force transmitted to the horizontal reinforcing rod 7 is directly transmitted to the lower end 1b of the zigzag wire A which is very close to the horizontal reinforcing rod 7, and the lower end 1b is gradually deformed. Conversely, if the horizontal reinforcing rod 7 is inserted into the third mesh or higher, the meshes B1 and B2 between the horizontal reinforcing rod 7 and the lower frame material 3 will become wider, so that they will not be struck by the bat. become.

In the above embodiment, an example of a ball-prevention fence has been described, but it goes without saying that the present invention can also be applied to a normal fence in which the lower frame member 3 is close to the ground, and in this case, the horizontal reinforcing rods are 7 can prevent the deformation of the lower end portion 1b of the wire mesh 1, that is, the loose state of the wire mesh 1, when the slightly upper side of the lower frame member 3 is accidentally kicked off.

<Effects> As is clear from the above explanation, in the present invention, the horizontal reinforcing rod 7 made of steel band with a square cross section is fitted inside the second mesh B2, so even if the lower part 1a of the wire mesh 1, that is, the horizontal reinforcing rod 7 Even if the slightly upper part is hit by a bat, most of the impact force is on the zigzag wire A.
It is transmitted to the horizontal reinforcing rod 7 through the horizontal reinforcing rod 7 to the vertical tension rod 4 at both ends, the reinforcing joint 8, and the support column 6.
It is transmitted to The force that is not transmitted to the horizontal reinforcing rod 7 is transmitted to the first mesh B1 of the wire mesh 1, but this force is weak.
Most of the force is absorbed by the elastic deformation of the zigzag wire A of the mesh B1 itself, and does not become a force that deforms the lower end portion 1b.

In addition, in the present invention, since the horizontal reinforcing rod 7 has a rectangular cross section and high rigidity, it does not have elasticity like the wire mesh 1, and damage to the butt can be visually determined. There is no knocking, and the dimension J between the horizontal reinforcing rod 7 and the lower frame material 3 is 50 ~
Because it is small at 75 mm, it does not need to be hit with a bat, and has the excellent effect of preventing the lower part of the wire mesh from coming loose due to mischief with a bat.

[Brief explanation of the drawing]

Fig. 1 is a front view of an embodiment of a fence equipped with the reinforcing device of the present invention, Fig. 2 is a sectional view of the main parts of the reinforcing device, Fig. 3 is a perspective view of the same, and Fig. 4 is a front view of a conventional fence. be. 1...wire mesh, 1a...lower part, 1b...lower end,
2... Upper frame material, 3... Lower frame material, 4... Vertical tension bar, 5
...Joint, 6...Strut, 7...Horizontal reinforcement bar, 8...
Reinforced joints.

Claims (1)

[Scope of utility model registration request] Diamond wire mesh 1 made up of zigzag wire rods A
The upper end of the wire A of the wire mesh 1 is externally engaged with the curled annular upper end, and has a cross section C.
A cylindrical upper frame member 2 which is shaped like a letter and whose opening is smaller than the upper end of the annular shape, and a lower end portion 1b of the wire rod A of the wire mesh 1 formed by curling are engaged in an externally fitted state and have a C-shaped cross section. A cylindrical lower frame member 3 whose opening is smaller than the annular lower end portion 1b, a vertical tension bar 4 that engages the left and right ends of the wire mesh 1 in an internally fitted state, and the vertical tension bar 4 and the upper and lower frame members 2. , 3 via joints 5, the second mesh B
A horizontal reinforcing rod 7 made of steel band with a square cross section is inserted into the lower half C or upper half D of 2, and the dimension between the horizontal reinforcing rod 7 and the upper edge of the lower frame member 3 is is set in a range of 50 to 75 mm, and the left and right ends of the horizontal reinforcing rod 7, the column 6, and the longitudinal rod 4 are sandwiched and connected from the front and back by a pair of reinforcing joints 8. Fuens reinforcement device.