JPS596857Y2 - Basketball backboard extension mechanism - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a basketball backboard extension mechanism.

Basketball backboard in the gymnasium,
In other words, a plate-shaped body with a basket attached to the front is
Generally, a structure is adopted in which the support frame is folded when not in use so as not to interfere with other competitions, and the support frame is extended only when in use so that the backboard faces a certain distance from the mounting wall. There is.

In order to extend and retract backboards with this type of structure, most backboards have conventionally been operated using a stepladder or from a high gallery surface near the mounting wall, which is extremely complicated. there were.

This invention was developed in view of the above circumstances.
An object of the present invention is to provide a backboard extension and contraction mechanism in which a handle box is provided at the bottom so that the backboard can be freely extended and contracted from a low position by rotating a cable having a spiral protrusion. There is.

Hereinafter, the present invention will be explained in detail based on the embodiments shown in the drawings.

FIG. 1 and subsequent figures show an embodiment of the present invention. In the figures, reference numeral 1 indicates a backboard, and a basket 2 is fixed to the front surface of the backboard.

This backboard 1 is fixed to a support frame 4 via mounting fittings 3.

The support frame 4 is arranged vertically as shown in FIGS. 1 and 2, and a pair of left and right front folding frames 5 are rotatably attached to the support frame 4 via arms 5a. .

These pair of left and right front folding frames 5 are rotatably connected to rear folding frames 7, 7 via hinges 6.

Furthermore, the rear ends of the pair of left and right rear folding frames 7 are rotatably supported via a support shaft 8 on a support frame 10 fixed to a wall surface by a bearing 9.

Arms 11 are attached to the upper ends of the support shafts 8 of the pair of left and right rear folding frames 7, with one end of each arm 11 being fixed.

Nut boxes 12 are rotatably supported above the ends of the arms 11, and male threaded portions formed at both ends of a rotating shaft 13 are screwed into the pair of left and right nut boxes 12.

Furthermore, a sprocket 14 is fixed midway along the rotating shaft 13.

Further, below the upper bearing 9, a sprocket 18 is stretched around the support shaft 8, and a chain 19 is stretched between these two sprockets 18 and 18 in a crossed state.

When the rotating shaft 13 is rotated and the support shaft 8 is rotated as described later, the chain 19 is connected to the left and right rear folding frames 7,
7 are provided so that they can be rotated in synchronization.

On the other hand, a control gear box 16 is attached via a bracket 15 to the middle of a support rod 10' which is disposed horizontally at the lower end of the left and right support frames 10 fixed perpendicularly to the wall side. A sprocket H6b attached to the output shaft 16a of the control gear box 16,
A chain 17 is stretched between the sprocket 14 and the sprocket 14 pivoted on the upper rotating shaft 13.

The control gear box 16 has a gear 1 installed therein via an output shaft 16a, as shown by the chain line in FIG.
A pair of left and right cylindrical arms 20.20 extend downward from the frame, and a guide pipe 22 is connected to these cylindrical arms 20.20 via a pipe joint 21. The upper ends of each are fixed.

The lower end of the guide pipe 22 extends along the wall surface, and is connected to the handle box 23 via a pipe joint 24 at a low position on the wall surface that is easy to operate.

A gear 26 is housed in the handle box 23 via a shaft 25, and an endless main cable 27 is stretched between the gear 26 and the gear 19 housed in the control gear box 16. It is suspended.

The main cable 27 has a spiral protrusion 27a formed on its circumferential surface to which the gear 19.26 can be screwed, and is guided along the guide pipe 22.

On the other hand, one end of a handle 28 is fixed to the outer end of the shaft 25 of the handle box 23, and by rotating the handle 28 by grasping the knob 29,
The gear 26 is rotated, the main cable 27 is run in a predetermined direction, and the gear 19 of the control gear box 16 is rotated.
, and rotate the output shaft 16a, sphere locket H6b, 14
, rotation can be transmitted to the rotating shaft 13 via the chain 17.

On the other hand, as is clear from FIG.
Chains 31 and 31 are stretched across each other between the tip of the frame 30 and the horizontal frame 30 pushed down between the support frames 4 and 4, and as the arm 11 rotates, the chains 31 and 31 An operation is performed to draw the front folding frames 5, 5 toward the wall surface.

Next, the operation of this embodiment configured as described above will be explained.

First, a case will be described in which it is desired to fold the backboard 1 from its maximum extended position as shown in FIGS. 1 and 2 and draw it toward the wall.

In this case, the main cable 27 is made to run by turning the knob 29 of the handle 28 provided in the handle box 23.

The rotation direction of the operating handle at this time is the direction in which the rotation shaft 13 is rotated and the arm 11 is rotated counterclockwise in FIG. 2 via the nut box 12.

In this way, when the rotating shaft 13 is rotated via the main cable 27 and the chain 17, the nut box 12
Since the nut box 12 is restrained by the arm 11, the nut box 12 moves toward the outside of the rear folding frame 7, and the arm 11, which is rotatably connected to the nut box 12, moves counterclockwise in FIG. Rotated.

Accordingly, the left and right support shafts 8 are rotated in a direction in which the rear folding frame 7 expands outward.

At the same time, the front folding frame 5 is pulled together via the chains 31, 31, and the hinge 6 portion is folded in the outward opening direction.

As a result, the backboard 1 is folded close to the wall surface as shown by the chain line in FIG.

On the other hand, if you want to extend the backboard 1, turn the handle in the opposite direction to the above-mentioned operation, the rotating shaft 13 will be rotated in the opposite direction, the nut boxes 12 will move toward each other, and as a result, the nut boxes 12 will move toward each other. The arm 11 is also rotated in the clockwise direction in FIG. Rotated in the direction of approaching, 2
The two rotating frames 5 and 7 are in an extended state as shown in FIG. 2, and the backboard 1 is in a fully extended state of use.

As is clear from the above explanation, according to the present invention, the backboard can be freely expanded and contracted by operating the handle of the handle box provided below the wall surface via the main cable having a spiral protrusion. There is no need to use a stepladder or climb on the gallery surface to work at high places, and an extremely easy-to-operate backboard extension mechanism can be realized with an extremely simple structure.

[BRIEF DESCRIPTION OF THE DRAWINGS] The drawings show one embodiment of the present invention.
The figures are a side view and a plan view of the backboard in a fully extended state, and FIGS. 3 and 4 are partially cutaway front views of a certain drive mechanism from the control gear box and handle box, respectively. 1... Backboard, 2... Basket, 5... Front folding frame, 6... Hinge, 7... Back folding frame. , 8...Spindle, 1
1... Arm, 12... Nut box,
13... Rotating shaft, 14, 16 b...
Sprocket, 16... Control gear box, 17... Chain, 22... Guide pipe, 23... Handle box, 26
...Gear, 27...Main cable,
28... Handle.

Claims (1)

[Scope of utility model registration request] A pair of left and right support frames are rotatably connected via hinges, a backboard is attached to the side of the support frame located away from the wall, and the base end of the support frame on the side closer to the wall is connected via a spindle. The left and right support frames on the wall side are rotatably supported on a shaft, and the support shafts of the left and right support frames on the wall side are linked by a rotating shaft through an arm having a threaded portion so as to rotate in the opposite direction, and the support is supported by the rotation of the rotating shaft. In the basketball backboard expansion and contraction mechanism, which expands and contracts the backboard by rotating the shaft, a control gear box is placed on a support frame fixed to the wall.
The output shaft of the control gear box and the rotating shaft are interlocked by a chain, and the input gear of the control box and the gear of a handle box mounted below the wall are housed in a guide pipe. A basketball backboard expansion/contraction mechanism, characterized in that the mechanism is linked by a main cable having a spiral protrusion.