JPS5929747Y2 - Defense net - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a ball protection net that is installed to partition the interior of a gymnasium during a ball game or its practice.

Conventional anti-ball nets are equipped with ropes for moving the net in addition to the support wires for hanging the net, and a chain of a certain length or a bendable rod-shaped rope to enable the net to be opened and closed using the rope for moving the net. It required connecting many bodies.

For this reason, the structure is complicated, and not only is it extremely troublesome to install the ball-prevention net, but it also has the disadvantage that it often becomes tangled when opening and closing the net, causing trouble.

Therefore, the purpose of this invention is to provide a ball protection net that solves the above-mentioned drawbacks and problems of the prior art by improving the opening and closing means of the net.

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

In the figure, 1 is a support line tensioned approximately horizontally between the side walls 2 of the gymnasium, 3 is a movable ring passed through the support line 1, and 4 is a continuous link to the movable ring 3. net suspended from 5
is the support line 1 at the moving end of the net 4 (left end in the figure).
This is an inchworm-type drive device that is installed to move by repeatedly engaging and disengaging from the support line 1 along the line, and is connected to the left end of the net 4 via a connecting member 6.

The details of the inchworm type drive device 5 are as shown in FIG. 2. Two slide sleeves 5a, 5a' on the left and right, which are slidably fitted on the support line 1, are connected to a total of four links 5b of equal length on the left and right.
, 5b', 5c, and 5c' are connected by a symmetrical four-node link, and the node pins 5d at the top and bottom of the center are connected.
5d are connected by a tension spring 5e, forming a so-called pantograph.

The left and right slide sleeves 5a, 5a' are attached with substantially central portions of crank-shaped crank levers 5f, 5f' so as to be rotatable symmetrically with pins 5g, and the tips of the crank levers 5f, 5f' are Formed locking claw 5h
, 5h' can be freely engaged with and detached from the support wire 1 through through holes 5i, 5i' provided in the slide sleeves 5a, 5a'.

A guide sheave 5 is connected to the base end of each of the crank levers 5f, 5f', and a guide sheave 5 is attached to the lower left and right non-knock levers 5c, 5c'.
1 and 51' in a cross-like manner on the opposite side, and hangs down on the floor with a length that allows manual operation.

Further, different auxiliary ropes 5m and 5m' connected to the base ends of the crank levers 5f and 5f' are hung vertically as they are long enough to be operated on the floor.

Then, as shown in Figure 1, the auxiliary rope is 5m or 5m'
are arranged in a cross shape via the guide sheaves 51 and 51', so that the operation rope 5' or 5' is connected to the adjacent operating rope 5 on the other side
It is connected in parallel with links 5c and 5c' by operating rods 5n and 5n'.

Therefore, in order to move this inchworm-type drive device to the left in the figure, twist (turn) the right operating rod 5n in the direction of arrow A in FIG.

Then, the locking claw 5 on the left slide sleeve 5a
h is locked to the support line 1, and the slide sleeve 5a becomes immovable.

At the same time, the operating rope 5k is tensed via the guide sheave 51', but is overcome by the action force (contraction force) of the tension spring 5e and moves the right slide sleeve 5a' to the left via the link 5c'. Become.

Next, when the force of twisting the right operating lever 5n' is released and the left operating lever 5n is twisted in the direction of the arrow, the right sliding sleeve 5a' has its locking claw 5h' aligned with the support line.
The left slide sleeve 5a, which is locked and immovable, and is now free, is slid to the left by the action of the tension spring 5e, thereby realizing one stroke of leftward movement.

That is, by repeating the above operation, it moves to the left like an inchworm, and the net 4 connected to this inchworm type drive device 5 can be gradually expanded.

On the other hand, to move it to the right, it is sufficient to perform almost the opposite operation as described above, first twisting the left operating lever 5n like an arrow opening, then repeating the operation of twisting the right operating lever 5n'.

Then, it moved to the right like an inchworm, and net 4
You can close it by pressing .

The gist of this invention is a ball protection net having the configuration described above, and provides the following effects.

■Other than one support line, there is no need for any moving ropes or chains, and the construction is extremely simple, making it extremely easy to install the ball protection net.

■Therefore, when opening and closing the net, ropes etc. do not get tangled and cause trouble, making it easy to use.

■The net can be opened and closed easily and reliably from the floor.

[Brief explanation of the drawing]

FIG. 1 is an elevational view showing the installed state of a ball-prevention net according to an embodiment of this invention, and FIG. 2 is an enlarged front view of an inchworm-type drive device. 1... Support line, 3... Moving ring, 4...
... Net, 5 ... Inchworm type drive device, 5
a, 5a'-...Slide sleeve゛, 5e...
...Tension spring, 5f, 5f'...Crank lever, 5h, 5h'...Latching pawl, 5, 5'...Operation rope , 51, 51'...
...Guide sheave, 5m, 5m'...Auxiliary rope,
5n, 5n'... Operation lever.

Claims (2)

[Scope of utility model registration request] (1) In a ball prevention net constructed by constructing a support line and lowering the net in series on a moving ring fitted to the support line, the support line is placed at the moving end of the net along the support line. An inchworm-type drive device is installed that moves by repeatedly engaging and disengaging the vehicle.
This ball protection net is characterized by a structure in which this is connected to a net. (2) The inchworm type drive device according to claim 1 of the above-mentioned utility model registration connects two slide sleeves fitted on a support line with four nodes constituted by four links of equal length on the left and right, Connect the nodes above and below the center with a tension spring,
A crank lever is rotatably attached to each slide sleeve, and the locking pawl formed at the tip of the crank lever can be freely engaged with and detached from the support line.An operating rope is connected to the base end of the crank lever, and the is hung down through a guide sheave to a length that can be operated on the floor, and a different auxiliary rope connected to the base end of the same side is hung as it is, and this auxiliary rope is hung down through the guide sheave to a length that can be operated on the other side. A ball protection net that is connected by a rope and an operating rod.