JPH0871195A - Housing backnet for baseball game for big dome - Google Patents

Abstract

PURPOSE: To provide the backnet for big dome, for which much labor is not required for housing and spreading the backnet, by perpendicularly hanging the backnet through main wires for hang-up from the ceiling a little close to the rear side at both the ends of head ropes, spreading and energizing the backnet through sub-wires for hang-up at both the ceiling parts. CONSTITUTION: A backnet 10 composed of a metallic melt net is partitioned through longitudinal ropes 11, and the upper ends of the longitudinal ropes 10 are defined as hanging points in a suspension bridge system. The lower side of the backnet 10 is reinforced by a frame 12, and counter weights 14 are fixed at both the ends of the frame 12. The backnet 10 is suspended by the suspension bridge system by connecting the longitudinal ropes 11 from fixed points at both the ends of a horizontally spread head rope 15 to a main rope 16 of a bent suspension frame. The backnet 10 is perpendicularly suspended by suspending both the ends of the head rope 15 through a main wire 18 for hang-up at a ceiling part 17 a little close to the rear side. Then, the head rope 15 is horizontally spread by a sub-wire 20 for hang-up.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retractable baseball back net for large domes.

[0002]

2. Description of the Related Art A large dome intended mainly for a baseball game is naturally equipped with a backnet for a baseball game. However, the large dome has no planned waste from being used only for baseball competitions from the beginning, and the seats etc. are designed to be mobile so that it can be used for other purposes such as soccer and other various purposes for various purposes. It is normal to Then, the back net greatly obstructs visibility in other competitions and events.

Therefore, in a large dome,
The back net for baseball games is configured to be retractable and stored when it is not in a baseball game, and it is attempting to eliminate the obstacle to the visibility. That is, FIG. 6 shows the one proposed above. In the figure, 1 is made of a flexible wire material such as nylon resin so that it can be wound up, and is woven into a fine mesh so as to ensure a predetermined strength. It is a sheet made of a net, with the peripheral frame and coffin reinforced with wires.

The back net 1 is provided with wire ropes 4, 4, 4 ', 4 from electric winches 3, 3, 3', 3'which are carried out substantially horizontally from compression rings 2 on the left and right sides in a slightly forward direction. It is lifted up by the ‘′’ so as to pinch both ends of the upper side 1a. The reason why the lifting wire rope is doubled is that the load on the wire rope is heavy and the dispersion is reduced because the vertical load must be supported by a substantially horizontal stretch.

The back net 1 is further pulled rearward from both ends of the upper side 1a via wire ropes 6 and 6'from electric winches 5 and 5'which are also carried out substantially horizontally from the compression ring 2 at the rear. There is. From the wire ropes 6, 6 ', it is properly corrected that the back net 1 is in the forward leaning posture when supported only by the wire ropes 4, 4, 4', 4 '. Back net 1
The clinch net 1b in the lower part of the seat is detachably attached to the front wall 7 of the seat. Reference numeral 8 denotes a shaft winding type winding device, which is mounted on a carriage 9 so as to be movable. The back net 1 is wound around the winding device 8 from the crimp net 1b. At this time, it goes without saying that each wire rope 4,
4 ', 6, 6'are rewound and controlled so that the standing posture of the back net 1 can be maintained. After winding, the wire ropes 4, 4 ', 6, 6'are wound up.

[0006]

In the conventional technology, the back net 1 stored in the winding device 8 cannot be left unattended on the ground. It must be secured and moved and stored, which has the burden of moving means and storing means. Although it can be stored, it is a winding operation while maintaining the standing posture of the back net 1, which is time-consuming and takes more time when re-tensioning, and winding of the wire rope at this time. , Rewinding work is extremely troublesome.

On the other hand, since the back net, which can be wound up and is highly flexible, is made of a fine mesh, the visibility is extremely low. Furthermore, the wire ropes 4, 4, 4 ', 4', which are responsible for supporting the main suspended load, have to be large in diameter because of the extremely mechanically irrational horizontal suspension, and are only in a horizontal position. However, there is a problem in that the degree of disability is further increased because of the significant visual disturbance.

The present invention has been made in view of the above problems of the prior art, and an object of the present invention is to make the back net itself and the net support mechanism have excellent visibility and to store and store them. It is an object of the present invention to provide a retractable baseball game back net for a large dome that does not require any additional moving means and storage means for the tensioning work.

[0009]

In order to achieve the above object, the back net according to the present invention has a metal meshing mesh having a large mesh and excellent visibility, and the lower side of the metal meshing net has a shape along a fence of a rigid stand. In addition to reinforcing the frame with a counterweight, a back net made by suspending the upper side of the head rope of the horizontal suspension from the both ends of the head rope of the horizontal suspension to the main rope of the curved suspension by the suspension bridge method,
Vertically hang both ends of the head rope through the main hoisting wire at a slightly rearward ceiling part, and for sub-suspension so that horizontal suspension is secured on the head rope at both ceiling parts. The wire is expanded and urged via a wire, and the frame is provided with a detachable connecting means for connecting to the fence of the stand and a guide rope for connecting and disconnecting.

[0010]

The back net is not rigid above the lower frame, but it is suspended by the suspension bridge method, so it can be stretched evenly over the entire length without buckling. Moreover, the support of the back net by this main lifting wire is mechanically rational directly above, and the wire diameter is reduced,
Therefore, the visibility is good.

The sub-raising wire, which acts to correct the backward tilting posture by the main hoisting wire that is set slightly toward the rear, is a function of the horizontal rope of the head rope, which is the role of the sub-raising wire. Since it can function effectively, horizontal suspension of the head rope, which is a major premise of the suspension bridge method, can be reasonably secured. Then, a back net under suitable extension is always provided, and it is detached from the fence of the stand,
If you raise it, it will be stored in a form that utilizes the upper dead space as a scoop, and if you lower it, the back net installation will be completed immediately.

Further, since the main and sub hoisting wires hang down from the ceiling, they do not horizontally pass in front of the viewer, and therefore, the visibility is not impaired at all, which is preferable.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG.
In FIG. 5, 10 is a back net composed of a welding net made of metal having high strength and a wide mesh interval and having good visual recognition performance, and is partitioned through the vertical ropes 11 ,. It is rational to set the upper end to each suspension point in the suspension bridge system as described later.

The lower side of the back net 10 is reinforced by a frame 12 made of a rigid material such as H-shaped steel, and the frame is designed to have a curved shape along which the fence 13 of the stand can be fitted. It is rigid and easy to install. It is preferable to fix the counterweights 14, 14 to both ends of the frame 12 for stability during storage.

The back net 10 comprises a main rope 16 of a curved suspension suspended from fixed points on both ends of a head rope 15 of a horizontal suspension.
On the other hand, the vertical ropes 11, ... Are connected to each other by extension or without extension, so that they are suspended by a suspension bridge method. Back net 10 is head rope 15
It is assumed that both ends of the above are vertically hung from the ceiling portions 17 and 17 which are located slightly rearward via the main hoisting wires 18 and 18. It is a reasonably heavy suspended load.

However, since the suspension point is closer to the rear side, the back net 10 is tilted backwards as it is. This is corrected by pulling the sub-lifting wires 20, 20 arranged on the ceiling portions 19, 19 on both sides and connected to both ends of the head rope 15. Sub lifting wire 20, 20
The main role of the is to set the horizontal tension of the head rope 15 which is a major premise of the suspension bridge method, but when pulling the head rope 15 that is pulled backward to the front and correcting it, the expansion biasing force to both sides Provides a firm horizontal stretch to the head rope 15. The back net 10 has a frame 12 at the lower end which is curved as shown above, but the upper end is a head rope 15 which is straight. Then, as shown in FIG. 2, both sides of the upper part are tilted backward to protect the viewer.

Pulleys are arranged on the ceiling portions 17, 17, 19 and 19 and a wire is connected to a winch installed on the ground for better visual and maintenance. The frame 12 and the fence 13
As shown in FIG. 5, a connecting metal fitting 21 is arranged between and, and is detachable. Guide ropes 22 and 22 for attaching and detaching the back net 10 are attached to both ends of the frame 12 so that the attaching and detaching work can be quickly performed.

As shown in FIG. 2, the fence 13 has a winding machine storage box 23, 23 for the guide ropes 22, 22.
Is provided. Then, as shown in FIG. 1, the back net 10 is displaced up and down by the main hoisting wires 18 and 18, but at any position, the sub hoisting wires 20 and 20 with respect to the head rope 15 are displaced. Since the horizontal tension is maintained, the back net 10 suspended from both end points of the head rope 15 maintains good extension and does not become unsightly.

[0019]

Since the present invention is configured as described above, it has the following effects. (1) Since the back net can be a metal welding net having a high rigidity and a large mesh interval, the visibility is improved. (2) The back net can be stored and installed quickly and easily. (3) Since a separate storage space for storage is unnecessary, it is extremely advantageous.

[Brief description of drawings]

FIG. 1 is an explanatory view of raising and lowering a back net of the present invention.

FIG. 2 is an overhead view of the back net of the present invention.

FIG. 3 is an explanatory diagram of the installation procedure in the large dome of the back net of the present invention.

FIG. 4 is an explanatory diagram of the installation procedure in the large dome of the back net of the present invention.

FIG. 5 is an explanatory view of the fence connection of the back net of the present invention.

FIG. 6 is an explanatory diagram of a conventional retractable back net.

[Explanation of symbols]

 1 back net 1a upper side 1b crimp net 2 compression ring 3 electric winch 4 wire rope 5,5 'electric winch 6,6' wire rope 7 spectator front wall 8 winding device 9 bogie 10 back net 11 vertical rope 12 frame 13 fence 14 Counterweight 15 Head rope 16 Main rope 17 Ceiling part 18 Lifting wire 19 Ceiling part 20 Lifting wire 21 Connecting metal fitting 22 Guide rope 23 Winder storage box

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Hideyuki Narita, 18-22 Nishiki, Naka-ku, Nagoya City Takenaka Corporation, Nagoya Branch (72) Inventor, Toshihide Aikawa 18-22 Nishiki, Naka-ku, Nagoya Issue Takenaka Corporation Nagoya Branch (72) Inventor Ryoichi Imai 18-18 Nishiki, Naka-ku, Nagoya City Takenaka Corporation Nagoya Branch (72) Inventor Koichi Usuda 8-21 Ginza, Chuo-ku, Tokyo No. 1 Stock Company Takenaka Corporation Tokyo Main Store

Claims (2)

[Claims] 1. A metal meshing mesh having a large mesh and having excellent visibility is reinforced by a frame having a shape along a fence of a rigid stand on the lower side of the welding net, and a counterweight is secured here and a suspension bridge is provided on the upper side. The back net is made by suspending from the both ends of the head rope of the horizontal suspension to the main rope of the curved suspension by the method, and the both ends of the head rope are connected to the ceiling part slightly rearward via the main hoisting wire. Vertically hung and expanded and urged via a sub-lifting wire so that horizontal suspension is secured on the head rope at both ceiling parts, and the frame is detachably connected to the fence of the stand. A retractable baseball back net for a large dome characterized by being equipped with a means and a guide rope for connection and disconnection. 2. The retractable baseball game for a large dome retractable baseball game according to claim 1, wherein the backnet surface is defined by vertical ropes that constitute each suspension point of the suspension bridge system.