JPS5929748Y2 - Anti-ball net device - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a ball protection net device for partitioning the inside of a gymnasium, etc. during a ball game or its practice.

The purpose of this invention is that when the ball net is pulled to the left and right after use and stored, the wire that opens and closes the ball net can be pulled up high to the ceiling of the room, thereby making use of more space in the ceiling of the room. To provide a ball protection net device which is improved in structure and does not interfere with the next ball game.

Conventional ball net devices have various improvements to the mechanism for opening and closing the ball net, but after use, the ball net can be separated into left and right sides, or either side can be brought together to one side for storage. When the ball net is opened and closed, the wires that open and close the ball net remain at the same height on the ceiling, and the wires of the ball protection net are generally not installed very high due to the purpose of the ball protection net. The wires present at the bottom often become an obstruction in the ceiling space and get in the way of various sports, competitions, and practices.

This invention was made to solve the above-mentioned drawbacks of conventional ball protection net devices.

Next, this invention will be explained with reference to illustrated embodiments.

1 and 2 show a ball-prevention net device that is an embodiment of this invention.

In the figure, 1 is a ceiling part of a gymnasium room, etc., 2 is a drum with a different diameter installed at one end of a place in the gymnasium room etc. where a ball protection net needs to be stretched, and 3 is a drum with the same diameter installed at the other end. Guide sheave with axis line parallel to drum 2, 4
5 is a wire wound in a sash-like manner between the reducing drum 2 and the guide sheave 3, and 5 is a ball-prevention net suspended from the wire 4 in sections approximately divided by width.

The configuration of the reducing drum 2 is as shown in detail in FIGS. 3 to 5.

That is, a large-diameter body part 21 and a small-diameter body part 22 connected in series so as to have a common center line are rotatably attached to a substantially U-shaped support frame 20, and a chino is attached to the left shaft end thereof. A wheel 23 is integrally attached, and a driving chino 24 is attached to it.
is wrapped around it.

Further, a guide sheave 25 is rotatably attached to the right shaft end.

This reducing diameter drum 2 is installed by attaching the support frame 20 to the ceiling or side wall component of the gymnasium.

The wire 4 consists of one piece, one end of which is connected (fixed) to the large-diameter body 21 of the reducing drum 2, wound several times, and then wrapped around the guide sheave 3 on the right in FIG. 1 in a sash shape. The other end is wrapped around the small-diameter body 22 in a sash, and after being wound several times, it is connected (fixed) to the small-diameter body 22.

Therefore, the winding directions of the wire 4 in the large-diameter trunk 21 and the small-diameter trunk 22 are exactly opposite.

Therefore, when this reducing diameter drum 2 is rotated in the forward or reverse direction, the wire 4 is wound in the large diameter drum 21 and the wire 4 is let out in the small diameter drum 22, so that the wire 4 is This creates a distinction between the outbound and inbound routes.

That is, in the above example of rotation, the forward path side portion is the large diameter trunk portion 21.
The term "return side part" refers to the part between turning back the guide sheave 3 and reaching the small-diameter body part 22.

Approximately the right half of such outbound side portion 4a and the return side portion 4
The anti-ball nets 5, 5, each with a width of about 100 mm, are suspended from hanging rings 6 over approximately the left half of b, and the tip edge of the anti-ball net 5 is held by a presser. Wire 4 with metal fittings 7, 7
The ball-preventing nets 5, 5 are each fixed to the corresponding portions of the ball nets 5, 5, and are configured to be movable to open and close by driving the wire 4.

The ball-prevention nets 5, 5 are configured such that when they are in a closed and tensioned state, the left and right ball-prevention nets 5, 5 overlap by a certain distance at the center (FIG. 1.2).

8 in the figure is a net stop, which stops the base end of the ball prevention net 5 as shown in FIG. The installation is supported by a support frame).

Next, a ball-prevention net 5 is stretched so as to overlap the wire 4 by a predetermined distance approximately at the center, more specifically at the center, of the outgoing portion 4a and the returning portion 4b,
5. Attach the sheaves 9°9' for hanging the wire 4 to a position (Fig. 1) that is a certain margin away from the position reached by each of the holding fittings 7, 7, and
.
However, this guide sheave can also be configured independently.

), and a wire lifting weight 12.12' is attached to the vertically hanging lower end.

Therefore, in the ball protection net device having the above configuration, when the variable diameter drum 2 is driven in the normal rotation by operating the chino 24, the large diameter drum 2
1 winds up the wire 4a, the small-diameter body 22 lets out the wire 4b, and the ball-prevention nets 5, 5 suspended from each are pulled out toward the center and stretched.

At the same time, due to the difference in circumferential length between the large-diameter body part 21 and the small-diameter body part 22, the tension of the hanging wires 4 a and 4 b is gradually increased, that is, the wire lifting weights 12 and 12' act. It overcomes the lifting force of the hanging sheaves 9, 9' and gradually straightens, eventually reaching the tensioned state shown in FIG.

Also, when the different diameter drum 2 is driven in reverse, the large diameter body 21
The wire 4a is taken out from the small diameter body part, the wire 4b is taken out from the small-diameter body part, and the ball-prevention nets 5, 5, which are hung from each part, are pulled back toward both ends to be in a stored state.

At the same time, due to the difference in circumference between the large-diameter body part 21 and the small-diameter body part 22, the hanging sheave 9.9', which is affected by the wire lifting weight 12.12', is compensated for by the drop in tension due to the difference in circumference between the large-diameter body part 21 and the small-diameter body part 22. It is gradually pulled up into a chevron shape, and finally reaches the stored state as shown in FIG.

That is, the wires 4a and 4b have their substantially central portions connected to the ceiling portion 1.
It takes on the shape of a mountain raised high towards the sky, expanding the space underneath.

Since the gist of this invention is a ball-prevention net device having the configuration described above, it has the following effects.

■ When the ball net is opened and stored, the wire that opens and closes the ball net is pulled up high toward the ceiling of the room.

■ Therefore, the indoor ceiling can be used widely and high, making it convenient for ball games and practice.

■ The height of the wire is automatically adjusted as a balance between the tension of the wire and the force of the weight for lifting the wire, and the operation is simple, requiring only the rotation of a drum with a different diameter.

[Brief explanation of the drawing]

Figures 1 and 2 are a front view and a plan view showing the curtain tensioned state of the ball-preventing net device of this invention, Figures 3 and 4 are a front view and a side view of the reducing drum, and Figure 5 is a FIG. 3 is a sectional view taken along the line ■-■ in FIG. 3, and FIG. 6 is a front view showing the ball-prevention net in a stored state. 5.5...Ball protection net, 2...Different diameter drum, 3...Guide sheave, 21...
・Large diameter body part, 22...Small diameter body part, 4a...
...Wire outbound side, 4b...Wire return side, 9
゜9'...hanging thief, 10.10'...
...Lobe, 12.12'...Wire lifting weight.

Claims (1)

[Scope of utility model registration request] A reducing drum is installed at one end of the area where the ball protection net is installed, a guide sheave is installed at the other end, one end of the wire is connected to the large diameter body of the reducing drum, and the wire is wound around the guide sheave. The other end of the hooked and folded end is connected to the small-diameter body of a different-diameter drum and each is wound a required number of times, and a ball-prevention net is hung on the outgoing and returning sides of the wire so that it can be opened and closed in approximately ÷ width increments. In addition, a hanging sheave is attached to approximately the center of the outgoing and returning sides of the wire, and a rope for suspending the hanging sheave is installed via a guide sheave installed on the ceiling of the room,
A ball-prevention net device characterized in that a wire hanging weight is attached to the other end of the rope to rotate a drum of different diameters.