Some standard content:
QB/T2384---1998
This standard is a newly formulated industry product standard and is a special product standard covered by GB/T3324-1995 "General Technical Conditions for Wooden Furniture". The main basis for formulating this standard is GB/T3324-1995 "General Technical Conditions for Wooden Furniture" and QB/T1951.11991 "Quality Inspection and Quality Assessment of Wooden Furniture". With the modernization of office equipment, people have put forward more and higher requirements for the use functions of writing desks. Now the writing desk products have developed from single-piece desks to multifunctional writing desks that combine the main desk with the auxiliary desk, side table, and movable low cabinet. In order to fully reflect the quality characteristics of wooden writing desk products, this standard proposes the concept of combined writing desks. Therefore, Chapter 4 of this standard includes the requirements for combined writing desks. Appendix A of this standard is the appendix of the standard.
This standard is proposed by the Quality Standards Department of China Light Industry Association. This standard is under the jurisdiction of the National Furniture Standardization Center. The drafting unit of this standard: Zhuhai Furniture Factory. The main drafter of this standard: Chen Huiming.
1 Scope
Light Industry Standard of the People's Republic of China
Wooden Writing Desk
QB/T2384-1998
This standard specifies the product classification, technical requirements, test methods, inspection rules and marking, labeling, packaging and other requirements of wooden writing desks. This standard applies to writing desks whose main components are made of wood or essentially artificial materials. 2 Referenced Standards
The provisions contained in the following standards constitute the provisions of this standard through reference in this standard. When this standard is published, the versions shown are valid. All standards will be revised, and parties using this standard should explore the possibility of using the latest version of the following standards. GB/T3324---1995 General technical conditions for wooden furniture GB/T33261997 Main dimensions of tables, chairs and stools GB/T4893--1985 Determination of paint film on furniture surface GB/T4983.9--1992 Determination of impact resistance of paint film on furniture surface GB/T10357.1-1989 Furniture mechanical properties test Table strength and durability GB/T 10357. 5~-1989
GB/T 10357.7—1995
Furniture mechanical properties test Cabinet strength and durability Furniture mechanical properties test Table stability
QB/T 1951. 1--1994
Quality inspection and quality assessment of wooden furniture
Determination of peel strength of soft covering materials on furniture surface ZB Y80 002---1988
ZB Y80 003---1988
3 Definitions
Determination of peel strength of hard covering materials on furniture surfaces This standard adopts the following definitions.
3.1 Combination writing table
A multifunctional writing table composed of a student table and a secondary table or side table (sometimes equipped with a movable low cabinet). 3.2 Main table
A student function table that can be used alone in the combination writing table. 3.3 Secondary table
An auxiliary function table (also called a single-legged side table) with legs at one end of the dish and the tabletop at the other end supported by the components on the main table, placed at the left (right) side of the main table at a certain angle to the length of the main table. 3.4 Side table
An auxiliary function table that has no structural connection with the main table and is placed at the left (right) side of the main table at a certain angle to the length of the main table. 3.5 Movable low cabinet
The base is equipped with universal wheels, usually placed under the main table, and can also be placed freely as an auxiliary low cabinet. 3.6 Keyboard tray
A tray installed under the desktop for placing a microcomputer keyboard that can be pushed and pulled horizontally. 3.7 Drawer interlock
Approved by the State Bureau of Light Industry on May 14, 1998
Implemented on March 1, 1999
QB/T2384-1998
A device that can lock several drawers on the same surface at the same time. 4 Product classification
4.1 Classification principles
This system's writing desk products are classified according to different functions. The product classification and code are shown in Appendix A (Standard Appendix) Table A1. 4.2 Model naming
The model of a wooden writing desk consists of two parts (code see Appendix A (Standard Appendix) Table A1) and overall dimensions (width × depth × height, expressed in millimeters). The model of a combination writing desk should add a third part: the overall dimensions of the side table or side table. Each two parts are connected by a separator "".
4.3 Model naming examples
Example 1:
Model of a single-cabinet writing desk with dimensions of 1200mm in width, 600mm in depth and 760mm in height: DGZ-1200 X 600X 760
Example 2:
Model of a combined writing desk with dimensions of main desk of 1500mm in width, 750mm in depth and 760mm in height and auxiliary desk (or side table) of 1200mm in width, 450mm in depth and 680mm in height:
ZHZ-1500X750X760-1200X450X680 5 Technical requirements
5.1 Main dimensions and dimensional limit deviations
5.1.1 The main dimensions of wooden writing desks shall comply with the provisions of GB/T3326. 5.1.2 See Appendix A (Standard Appendix) Table A2 for the limit deviation of product dimensions. 5.2 Shape and position tolerances
See Appendix A (Standard Appendix) Table A3 for the shape and position tolerances of products. 5.3 Material requirements
5.3.1 The wood moisture content of the product shall not be higher than the annual average wood equilibrium moisture content of the product area plus 1%. If the product distributor or group ordering unit has other requirements for the moisture content of the material, it should be clearly stated in the contract. 5.3.2 The essential materials used in the product shall comply with the requirements of 4.3 of GB/T3324-1995. 5.3.3 All kinds of cladding materials, hardware, chemical materials, etc. used shall comply with the relevant standards. 5.4 Woodworking requirements
5.4.1 All parts made of artificial boards shall be edge-sealed except for the internal hidden places. The edge sealing shall be tight and smooth, and debonding and glue slump on the surface are not allowed.
2 The veneer and other materials should be tightly and smoothly pasted, without any degumming, obvious glue penetration or bubbling. 5.4.2
5.4.3 The extension, bending, shaping, edging and transition of the post-molded decorative board should be smooth and clean, and fit closely with the substrate surface without cracks, indentations or scratches. 5.4.4 The chamfers, fillets and round lines on the product surface should be uniform and consistent. 5.4.5 The combination of sample and self-assembled and disassembled product parts should be tight and firm. 5.4.6 The combination of supporting parts such as corner plugs and drawer bars should be firm. The matching of the panel parts should not be loose. 5.4.7 The opening and closing parts and accessories should be flexible to use. If drawer interlocking is used, it should be ensured that each drawer of the interlocking can be locked or opened at the same time. 5.4.8 The combination of the auxiliary table and the main table of the combined writing desk should be stable and reliable. If it is equipped with a movable low cabinet, the low cabinet should be pushed flexibly and freely. 5.4.9 If the writing desk is equipped with a keyboard tray, it should be installed firmly and should be stable when typing. 5.4.10 Various accessories and connectors should be installed tightly, flatly, straightly and firmly; there should be no gaps or looseness at the joints; there should be no missing parts, missing nails (except for the optional mounting holes designed on the drawer rails) or nail penetration. 5.4.11 The linear shape of the wood should be basically consistent, and the turning lines should be clear. 98
QB/T2384--1998
5.4.12 The roughness R. of the internal unpainted parts is 3.2~~12.5um (fine light), and the roughness R. of the hidden parts is 12.5~50μm (coarse light).
5.4.13 For the requirements of drawer opening and closing force, see Table A4 in Appendix A (Appendix to the standard). 5.5 Finishing requirements
5.5.1 The product finishing shall comply with the provisions of 4.5 in GB/T3324-1995. 5.5.2 The surface texture and color of the soft and hard coverings of the product shall be similar, and wrinkles, cracks, scratches, chipping and cutting edges are not allowed. 5.6 Physical and chemical performance requirements
For the requirements of the physical and chemical performance of the paint film coating and the soft and hard coverings, see Table A5 in Appendix A (Appendix to the standard). 5.6.1 The requirements of the physical and chemical performance of the paint film coating shall comply with the provisions of items 1 to 8 in Table A5. 5.6.2 The physical and chemical properties of the soft and hard covering materials shall comply with the provisions of items 1, 2, 3, 5, 6, 7, 8, 9 in Table A5. 5.7 Mechanical performance requirements
The mechanical performance requirements of the product are shown in Table A6 of Appendix A (Standard Appendix), where the mechanical properties of the keyboard tray shall comply with the provisions of items 8 and 10 in Table A6.
6 Test methods
6.1 Product appearance inspection, wood moisture content, main dimensions, shape and position tolerances shall comply with the provisions of 5.1 to 5.4 of GB/T3324-1995.
6.2 The determination of the sag and swing of the keyboard tray shall comply with the provisions of 5.4.7 of GB/T3324-1995. 6.3 Physical and chemical performance tests
6.3.1 The physical and chemical performance tests of paint film coatings and soft and hard coverings shall comply with the provisions of GB/T4893. 6.3.2 The determination of the peel strength of soft and hard covering materials shall comply with the provisions of ZBY80002 and ZBY80003 respectively. 6.4 Mechanical performance test
The mechanical performance test of the product shall be carried out at level 3. 6.4.1 The strength and durability test of the table shall comply with the provisions of GB/T10357.1. 6.4.2 The stability test of the table shall comply with the provisions of GB/T10357.7. 6.4.3 The mechanical performance test of the drawer and keyboard tray shall comply with the provisions of 7.5 of GB/T10357.5--1989. 6.4.4 The determination of the drawer opening and closing force shall be carried out before and after the drawer and slide durability test in accordance with the provisions of 7.5.1 of GB/T10357.5--1989. The opening and closing force is measured when the drawer is opened and closed. The opening and closing are performed three times each. The arithmetic average of the measured values is the measured opening and closing force.
7 Inspection rules
7.1 Type inspection
7.1.1 Type inspection should be carried out in the following situations. a) Trial production and identification of new products or old products transferred to the factory for production; b) After formal production, if there are major changes in structure, materials, and processes, which may affect product performance; c) During normal production, regular inspections should be carried out after a certain amount of production has been accumulated. The inspection cycle is generally one year; d) When the product is resumed after a long period of suspension of production: e) When the factory inspection results are significantly different from the last type inspection; f) When the national quality supervision agency proposes a requirement for type inspection. 7.1.2 Inspection items
The inspection should be carried out item by item according to the items related to the product in 5.1~~5.7. When the product has items beyond the technical requirements of this standard, it shall be stipulated in the enterprise standard or agreed upon by the supply and demand parties. 7.1.3 Sampling and batching rules
QB/T2384--1998
7.1.3.1 Sampling inspection shall be adopted for type inspection. After numbering in the master sample, the inspection sub-sample shall be randomly selected. 7.1.3.2 The number of master samples of single-layer, single-cabinet and double-cabinet writing desks shall not be less than 20 pieces, from which 2 pieces shall be selected, 1 piece shall be sent for inspection and 1 piece shall be sealed. 7.1.3.3 The number of master samples of combination writing desks shall not be less than 5 sets, from which 2 sets shall be selected, 1 set shall be sent for inspection and 1 set shall be sealed. 7.1.3.4 The specimens for the physical and chemical properties test of the paint film are generally obtained directly from the inspected product, or they can be made under process conditions alternate with those of the inspected product. The specifications of the specimens shall be in accordance with GB/T4893. 7.1.4 Inspection procedures
Inspection procedures for inspection specimens: appearance inspection, mechanical properties test, and physical and chemical properties test. 7.1.5 Grading rules
7.1.5.1 Superior products, i.e. Grade A products. All mechanical properties test items shall be qualified; one item of Grade B is allowed in the physical and chemical properties test items; one item of unqualified is allowed in the product size limit deviation and shape and position tolerance in other items, and the rest of the items shall be qualified. 7.1.5.2··Superior products, i.e. Grade B products. All mechanical properties test items shall be qualified; one item of Grade C is allowed in the physical and chemical properties test items; two items of unqualified are allowed in the product size limit deviation and shape and position tolerance in other items, and the rest of the items shall be qualified. 7.1.5.3 Qualified products, i.e. Grade C products. All mechanical properties test items shall be qualified; all physical and chemical properties test items shall reach Grade C; two items of unqualified are allowed in the product size limit deviation and shape and position tolerance in other items, and two items of unqualified are allowed in the woodworking and coating appearance requirements, and the rest of the items shall be qualified. 7.1.5.4 Unqualified products. Products that fail to meet the requirements of qualified products are unqualified products. 7.1.6 The confirmation of the grade of superior and first-class products must be based on the inspection certificate of the physical quality level issued by the national inspection center, the industry's full-time inspection agency, or the inspection agency commissioned by the state or industry; qualified products are inspected and evaluated by the enterprise. 7.1.7 Re-inspection rules
7.1.7.1 If a product fails the type inspection, it can be re-inspected once, and the re-inspection sample must be a spare sample sealed in the enterprise. 7.1.7.2 Re-inspection should be carried out on items that failed the first inspection and items that could not be inspected due to damage to the test piece. 7.1.7.3 The evaluation of the re-inspection results should be in accordance with the provisions of 7.1.5. Indicate "re-inspection" in the inspection report. 7.2 Factory inspection
Factory inspection should be carried out by the enterprise's quality inspection department within the validity period of the product's type inspection. 7.2.1 Inspection items
The inspection items shall be carried out in accordance with the items related to the product in 5.1~5.4 (except 5.4.13) and 5.5; when the product has inspection items other than the factory inspection items of this standard, the provisions shall be made in the enterprise standard or agreed upon by the supply and demand parties. 7.2.2 Sampling and batching rules
Sampling and batching shall comply with the provisions of 5.2 of QB/T1951.1-1994. 7.2.3 Evaluation of inspection results
7.2.3.1 If the inspection results of unit products meet the provisions of 6.1 and 6.3, they shall be evaluated as qualified products. 7.2.3.2 The evaluation of batch products shall comply with the provisions of 5.4 of QB/T1951.1-1994 for the evaluation of batch products. 7.2.3.3 Products shall be inspected according to the factory inspection items. If the technical indicators meet the requirements of the type inspection, they shall be shipped according to the product grade assessed during the type inspection. If the product grade is lower than the assessment conclusion during the product type inspection, it shall be assessed according to the grade actually achieved. 8 Marking, labeling, and packaging
8.1 Products must be marked with the product name, specifications, model, factory date or production batch number, manufacturer name and address in Chinese. 8.2 Products must have an inspection certificate or product grade mark. 8.3 Products must have a Chinese manual, including: a) Main materials for the product and main materials for surface coating; b) Standard code:
C) Precautions for product use and maintenance;
d) Self-assembled panel-type disassembly products should be accompanied by clear and illustrated assembly drawings and installation instructions. 8.4 Products should be padded or packaged during transportation to prevent damage and rain. 8.5 The product should be kept dry and ventilated during storage, and should not be exposed to sunlight. When stacking, cushioning materials should be added to prevent damage. o
QB/T2384-1998
Appendix A
(Appendix to the standard)
Requirements for wooden desks Appendix
Table A1 gives the classification of wooden desk products Table A1
Single-layer desk
Single-cabinet desk
Double-cabinet desk
Combination desk
Classification of wooden desk products
Table A2 gives the maximum deviation of product dimensions. Table A2 Limit deviation of product dimensions
Single-layer writing desk
Single-cabinet writing desk
Double-cabinet writing desk
Combination writing desk
A3 Table A3 gives the product shape and position tolerances. Table A3
Verticality of adjacent edges
Steadyness of sole
Flatness
Position difference
Tolerance of product shape and position
Test piece name and specification
Diagonal length
≥1400
≥700
≥1000
Distance deviation between adjacent surfaces of door and frame, door and door (not required by design) No.
Distance deviation between adjacent surfaces of drawer crown and frame, drawer crown and door, drawer and drawer (not required by design)
Allowable value
Sag, swing
Keyboard tray
The requirements for opening and closing force of drawer crown are given in Table A4. A4
Clear height inside the crown.mm
QB/T 2384-1998
Continued Table A3
Test piece name and specification
Embedded type
Cover mounted
Embedded type
Cover mounted
Support for drawer
Wooden support
Metal guide rail
Wooden support
Metal guide rail
Upper, left and right seams
Middle and lower seams
Gap between the back of door and the plane of frame
Upper, left and right seams
Gap between the back of drawer face and the plane of frame
Requirements for drawer opening and closing force
Before test
The physical and chemical property requirements of paint film coating and soft and hard coverings are given in Table A5. A5
Table A5 Requirements for physical and chemical properties of paint coatings and soft and hard coverings No.
Liquid resistance 10% sodium carbonate
30% acetic acid
Moisture and heat resistance
Dry heat resistance
Adhesion
Resistance to cold and hot temperature difference
Impact resistance
Peel strength
Test conditions
Cross cutting spacing 2mm
Paint film, Polaroid board, gorgeous board 2000Y,
PVC and paper veneer 400%
Test temperature (40±2)C and (-20±2)℃. 3 cycles photoelectric gloss meter|| tt||Impact height 50mm
Allowable value
Durability
After the test
No blistering, cracks and obvious gloss loss
Not less than Level 3
Not less than Level 3
Soft covering 3.5×10°N/m
Hard covering 1.4×10°N/m
Note: If the coating process of the chestnut surface is different from that of other parts of the table, tests No. 1, 2, 3, and 5 should be carried out on the table top, or on specimens made under the same process conditions as the table top
A6Table A6 gives the product mechanical property requirements. 102
Vertical static load of desktop
Vertical static load of auxiliary desktop
Continuous vertical static load of desktop
Vertical impact of desktop
Horizontal durability of desktop
Vertical loading stability of desktop
Vertical and horizontal loading stability of desktop
Drain (or keyboard tray) and slide
Durability
Strength of drawer structure
QB/T 2384 .- 1998
Table A6 Mechanical performance requirements of products
Test conditions
Force 1000N, loading 10 times
Force 350N. Loading 10 times
Vertical load 1.5kg/dm2, loading seven
Mass 25kg±0. 1kg impactor, drop
depth 140mm, impact secondary
force 150N, cyclic loading 15000 times
minimum force 600N
vertical force 100N, minimum horizontal force 40N
linear speed average about 0.25m/s. Cycle
number of times 40000 times
force 60N, load 10 times
drawer (or keyboard tray) slide strength
force 350N, load 10 times
should be tested according to the provisions of 7.1.7.1 of G3/T 10357.1-1989
should be tested according to 7.1.1. 2. The test should be qualified according to the provisions of 7.1.1.3 in GB/T 10357.1-1989, where the ratio of the deflection of the table top to the length should be ≤0.%
The test should be qualified according to the provisions of 7.1.3 in GB/T10357.1-1989Www.bzxZ.net
The test should be qualified according to the provisions of 7.2.1 in GB/T10357.1-1989, where the table top displacement value. The allowable value should be 15mm
Should be tested and qualified according to the provisions of 5.1 in GB/T10357.7-1995
Should be tested and qualified according to the provisions of 5.2 in GB/T10357.7-1995
Should be tested and qualified according to the provisions of 7.5.1 in GB/T10357.5-1989
Should be tested and qualified according to the provisions of 7.5:2 in GB/T10357.5
Should be tested and qualified according to the provisions of 7.5.4 in GB/T10357.5-1989
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