GB 23176-2008Basketball backstop (English PDF)

4.1 Structure and size

4.1.1 The structure and size should be consistent with Figure 1, the requirements shown in Figure 2.

Millimeters

Figure 1

Millimeters

Figure 2

4.1.2 rebounds from the end line and column from the position shown in Figure 2 requirements.

4.2 Rebounds

4.2.1 rebounds plane being perpendicular to the horizontal plane shall be maintained.

4.2.2 rebounds positive surface should be smooth, no cracks, chipping off the block.

4.2.3 rebounds in a rectangular, adjacent rim should be perpendicular to each other, should not exceed the difference between the two diagonal 6mm, and there should be no sharp edge edges and corners.

4.2.4 If the backboard with metal border protection, the rebound should be at least 20mm wide outer border is not obstructed by a metal frame.

4.2.5 should be printed on the backboard inside, outside borders, transparent backboard inside and outside the borders of white, non-transparent backboard black border, inner border line Along with the ring should be flush with the edge on the bottom line.

4.2.6 rebounds rigid. rebounds by a predetermined force, the deflection of the center. the tempered glass backboard should not exceed 3mm, other boards should not More than 6mm, after the abolition of external 1min rebounds should restitution.

4.2.7 Competition elastic rebound. When a contest with basketball falls on the rebounds, rebound height should be at least 50% of the height of his whereabouts.

4.2.8 glass backboard security. if damaged, broken glass should not fall.

4.3 Ring

4.3.1 Solid ring made of steel, strip basket circle diameter of 16mm ~ 20mm, ring inner diameter of 450mm ~ 459mm.

4.3.2 along the ring should be evenly spaced lines 12 Nets device, the device should be no acute angle, burr, and the device should not be greater than 8mm Gap, shown in Figure 3.

4.3.3 along rebounds from the closest distance to the nearest point on the ring rebounds board shall be 151mm ± 2mm, shown in Figure 3.

4.3.4 should be fixed to the support ring rebounds framework between the fixed ring of steel and glass backboard should not have direct contact.

4.3.5 should ring orange inside should be approved by FIBA natural color system (NCS) Range. 0080-Y70R, 0090-Y70R, 1080-Y70R.

4.3.6 ring flexural properties. elastic ring by a predetermined force, its front edge or rotated relative to the original horizontal position should not exceed 30 °, should not be less than 10 °, should restitution after unloading.

Millimeters

Figure 3

4.4 Nets

4.4.1 Application of the white race with the Nets into a knot, there are 12 ring hole, the structure should be able to make subject to certain drag the ball through.

4.4.2 Nets length of 400mm ~ 450mm.

4.4.3 Competition with the upper part of the Nets should be semi-rigid.

4.5 Backboard support structure

4.5.1 backboard support structure rigidity. a frame specified by an external force after unloading, computing support frame from the original location of permanent deformation level should not exceed 10mm.

4.5.2 backboard support structure stability. a frame specified by an external force after unloading, computing support frame from the original location of permanent vertical deformation the amount should not exceed 10mm.

4.5.3 For two, three games, you can use hanging basketball.

4.6 Binders

4.6.1 Competition with backboard and backboard support structure should be bandaged.

4.6.2 racing under the backboard should be not less than 48mm and not more than 55mm thickness of the dressing; on the side surface, in the direction from the rebound from there should be not less than 350mm and not more than 450mm height binders, thickness not less than 20mm and not more than 27mm; the front and rear from the lower surface of the backboard from 20mm ~ 25mm high office, should be not less than 20mm and not more than 27mm thick binders, as shown in Figure 4 FIG.

Millimeters

Figure 4

4.6.3 Competition with a basketball backboard behind the backboard support structure for the stadium to be filled after lining dressing, height of not less than 2150mm, Dressing thickness not less than 100mm; behind the backboard support any part should be packed in its lower surface dressing thickness not less than 25mm, straight from behind the backboard at 1200mm, as shown in FIG.

4.6.4 All dressing should have a certain cushioning properties, should prevent limb caught, when the external force is suddenly applied to the dressing, bandage Depression was not more than 50% of its original thickness.

4.6.5 All dressing should be blue or other large body frame with contrast color.

Millimeters

Figure 5

4.7 Characteristics of Body lifting

Folding basketball should lift flexible, smooth operation.

4.8 Hydraulic systems and electrical properties

Basketball, hydraulic lift hydraulic system 4.8.1 There shall be no leakage, oil leakage phenomenon.

4.8.2 basketball live parts and the exposed conductive part of the insulation resistance should not be less than 2Mohm, and capable of withstanding a test voltage of 1500V, Determines current 10mA, frequency of 50Hz single-phase AC 1min, should not flicker or breakdown phenomenon.

4.9 Surface quality

4.9.1 frame body with spray coating or other process, should reach a finish layer adhesion, hardness should reach 2H.

4.9.2 Finishing surface coating after 24h cycle test, the corrosion resistance should >=6 level.

4.9.3 finish layer surface should be smooth, uniform color, no peeling off, holidays, corrosion, cracks and obvious flow marks, piebald junction and other defects.

The exposed surface of the weld 4.9.4 Welding member and associated surface should be smooth, regular, seamless welding, Weld, burn and obvious weld undercut, raised, Depression, porosity, slag splashing and other defects.

5.1 Structure and dimensional inspection

The frame body rise to a predetermined position, steel tape, steel ruler, calipers and other precision measuring tools corresponding measurement.

5.2 Rebounds verticality inspection

Plumb line hanging from the top of rebounds, positive visual plane is parallel with the plumb line.

5.3 Rebounds stiffness test

Figure 6 rebounds flat, rebounding center in applying 500N static load 1min, by dividing the value of the height gauge measuring 0.02mm.

Millimeters

NOTE. 50mm bearing length shorter than the width of the boards width.

Figure 6

5.4 Rebounds elasticity test

Figure 7 rebounds flat, in line with the international game using basketball into the top of the backboard to rebound from the bottom of the center plane

1000mm, in the absence of rotation allowed to fall freely, measuring the height of the bottom of the basketball rebound to the highest point on the measurement points Flexibility test was repeated three times, should have qualified.

Millimeters

NOTE. 50mm bearing length shorter than the width of the boards width.

Figure 7

5.5 Rebounds glass safety test

According to GB/T 9962-1999 test specified in 6.10, according to GB/T 9962-1999 5.10 predetermined evaluation.

5.6 Ring bending performance test

The ring is fixed, then at the forefront of the ring from the most distant rebounds 1050N static load applied to maintain 1min, steel ruler to measure, then After calculating the rotation angle.

5.7 Backboard support structure stiffness test

Figure 8 respectively applied to F1 = 900N (racing), F2 = 130N (for practice), F3 = 1000N (racing) force holding

1min, after unloading by dividing the value of 0.5mm steel ruler to measure the vertical displacement amount.

5.8 Backboard support structure stability test

Figure 8, with the basketball competition at the root of the ring is gradually applied F4 = 3200N static load, practice with the basketball hoop in the roots

Gradually apply F5 = 2700N static load, to maintain 1min, after unloading is by indexing 0.5mm steel ruler to measure the vertical position Shift amount.

Figure 8

Performance Test 5.9 buffer dressing material

5.9.1 Test Conditions

Environmental conditions. temperature (23 ± 2) °C. After the pre-test sample should be at least 3h detected in this environment.

Test specimens. not less than 500mm × 500mm sample block a claimed filler material and equipment use the same.

Metal impactor. 9, metal impactor shall meet the basic dimensions and quality requirements.

10, the impact should be installed on one accelerometer.

Millimeters

Figure 9 Figure 10

5.9.2 Test Method

The test sample is placed flat solid concrete floor or on the instrument to be tested. The impactor to 1000mm lift height Fixed, release the impactor and allowed within the test area plummeted to record accelerometer information transmitted in the whole impact process. In the same Position five consecutive tests, each test interval between 1min ~ 3min.

5.9.3 Evaluation Results

In the average of three consecutive peak acceleration during impact, said filler for shock absorption capacity. Peak acceleration shall not exceed

5.10 Lifting characteristic test

The folding basketball lift three times in a row, visual inspection.

5.11 Hydraulic System Test

The folding basketball lift three times in a row, visual inspection.

5.12 Electrical performance test

Insulation resistance 500V/500Mohm megger, pressure resistance with 1.5kV ~ 5kV voltage meter testing.

5.13 Surface Quality Inspection

5.13.1 Coating layer adhesion, hardness and corrosion resistance test

Adhesion according to GB/T 9286-1998 specified test and evaluation. Hardness GB/T 6739-2006 regulations were measured. Resistance Corrosion was measured by GB/T 1771-2007 requirements.

5.13.2 Plating corrosion resistance test

Press QB/T 3826-1999 specified test results according to QB/T 3832-1999 were evaluated.

5.13.3 Surface appearance quality inspection

With sensory testing.

5.14 Other items Test

With sensory testing.

6.1 Delivery inspection

6.1.1 Each batch of products should be raised after passing inspection before the factory after passing the mark.

6.1.2 delivery inspection according to the special inspection level GB/T 2828.1-2003 of S-1, a normal check sampling, its failure classification, testing Projects and terms, test methods and the terms of acceptance quality limit (AQL value) specified in Table 1. This test method uses the piece, single sample Bit is "deputy."

Table 1

Substandard classification test items and test methods Terms and Conditions acceptance quality limit (AQL value) A dressing 5.14 2.5 4.6.3 4.6.1 ~ Structure and size 4.1 5.1 Rebounds 4.2.1 ~ 4.2.5 5.2,5.14 Ring 4.3.1 ~ 4.3.5 5.14 Nets 4.4 5.14 Frame body lift characteristics 4.7 5.10 Hydraulic System 4.8.1 5.11 4.0 C surface quality 4.9.3 4.9.4 5.13.3 ~ 6.5

6.2 Type inspection

6.2.1 Type test sample should be inspected batch settlement at random.

6.2.2 Type inspection once a year, should also be the type tests in one of the following situations.

--- Structural design have a major change;

--- Key technology or key changes;

--- Product testing are very different and the last type test results;

--- National quality supervision agency type inspection requirements.

6.2.3 Type test sample using GB/T 2829-2002 in determining the level I once sampled.

6.2.4 Type inspection items and provisions for test methods and terms of substandard quality level (RQL values) and in Table 2 of the sampling plan get on.

Book GB 23176-2008

Table 2

Test items and test methods Terms and Conditions of substandard quality level (RQL values) sampling program like [Ac, Re] 5.3 rebounds rigid 4.2.6 4.2.7 5.4 rebounds elasticity Security 4.2.8 5.5 rebounds Ring bending performance 4.3.6 5.6 4.5.1 5.7 rebounds rigid support structure Backboard support structure stability 4.5.2 5.8 Dressing cushioning properties 4.6.4 5.9

4.8.2 Electrical Properties 5.12 4.9.1 finish layer adhesion and hardness 5.13.1 Finishing member corrosion 4.9.2 5.13.2 501 (0,1)

7.1 Marks

Each basket or on its packaging should be product name, manufacturer name, business address, model number, production date, contact details, trademarks, performance Standard number, as well as safety precautions and other warning signs, labeling should be firm and clear.

7.2 Packaging

Packaging should prevent the outer surface damage, should be accompanied by a certificate and instructions for use in the packaging.

7.3 Transport

During transportation to avoid collision, extrusion, to prevent deformation.

7.4 Storage

Should not be in contact with acid, alkali, salt and other substances, storage place should be well ventilated.