desk-and-chair-design

教室桌椅及其布局改进设计 一 D9 D308 classroom desks and layout data are as follows PARTDATA ITEMDATA cm width40 length36 hight41 5 chair clearance10 length256 width35 hight 76 desk hight of drawer60 Left from the teacher s desk 90 Right from the rostrum 154 Width of left aisle 64 Width of left aisle 64 Width of middle aisle 80 Occupy width92 layout Last row and wall70 length1060 width780 Width of teacher s desk 100 Distance of the outer edge of desk and wall 164 classroom Width of object stage 30 二 design and calculation of chair and desk 1 according to the data of Chinese human body posture feet GB10000 88 18 25 years old 5 95 4 1 4The length of forearm 4 6 1the length of hand 4 3 1 4 3 10 sitting height Cervical vertebra height eye height shoulder height elbow height Thigh thickness Knee height height of leg with foot depth distance of hips and knee Lower extremity length width of hips max width of shoulder MIN mmMAX mmDATA ITEMBOYSGIRLSBOYSGIRLS The length of forearm 216194259253 the length of hand 170158196183 sitting height 863811963903 Cervical vertebra height 513581702658 eye height753636851785 shoulder height 557517641593 elbow height 227214291283 Thigh thickness 114113149148 Knee height495428535494 height of leg with foot 386346454408 depth423401494468 distance of hips and knee 516495594568 Lower extremity length 9258541068978 width of hips 292306345368 max width of shoulder 395359463424 2 design 1 According to the above data set sitting hip width slightly larger values of 350mm and width of 40cm from original chair In order to avoiding the waste of materials and considering the people sitting under the chair deficiency caused by her legs apart chair surface is designed a trapezoid and frontier take 50 cm wide 2 depth 423 494 3 8 401 468 8 452 75cm Because insufficient deep will make the sitting chair surface pressure too large that lead to uncomfortable sitting while much depth will lean back in a chair uncomfortable so set sit deep moderate value considering the male female ratio this value is slightly to the boys of 452 75mm floor to 450mm Extension length is 450mm with the junction of 50mm slot so the chair surface actual extension of 400mm 3 Leg and foot high 386 454 3 8 346 408 8 409 25 Calf and foot high and moderate values of 409 25mm Ceiling to 409mm considering that rounding sole high 21mm so takes the chair high 430mm 4 elbow height 227 291 3 8 214 283 8 256 375mm Considerations to elbow height is more comfortable and easy adjusting pad elbow wood block round the fare up to 260mm 5 Lower extremity length Consider the largest sitting lower extremity length 1068mm sqr 1068 450 2 430 2 450 443 87 450 893 87mm To round up the 900mm plus a table wood thickness 50mm table spacing 950mm 6 Cervical point height 513 702 3 8 581 658 8 610 5mm Integer 610mm The back curve length 610mm considering the chair back and the chair surface angle 115 degree comparatively rightly 610 sin 75 180 3 14 552 8mm To round up 550mm chair of high 430mm after a row of the height of the desktop and the front row of ground height difference is 980mm Sqr 610 2 550 2 263 8mm 约为 264mm 7 Forearm hand length length 216 259 170 196 3 8 194 235 158 183 8 411 625mm Integer 410mm table width 410mm 8 Table height The original classroom desktop with the height 760mm is suitable The data do not need changes 9 Step height 980 760 220mm 10 Drawer 1 Knee height 459 535 3 8 428 494 8 488mm The other highly 488 2 409 576mm The original drawer height 600mm no need to change 2 distance of hips and knee 516 594 3 8 495 568 8 549 125mm To round up to 550mm 900mm 550mm 350mm A drawer depth 350mm 11 max width of shoulder Students with be affected due to distance near seriously here take a larger value of 450mm Considering that laying on the table will make elbow external plus with 150mm to 600mm 三 To make design details of chair and desk perfect 1 The chair surface fold knocking noise always recall from time to time it will affect the study of students are observed to fold the chair after the connection of the collision considering material attached to TPEE thermoplastic polyester elastomer the material is block copolymer contain polyester hard segment and polyether soft segment for producing plastic noise reduction gear TPEE has the elasticity of the rubber and engineering plastics strength 2 The original chair surface is smooth wood look to the projector screen time easily slipped considered in the chair surface embedded in even arrangement cloth cushion can slip and comfortable 3 When look up the touch of head and later card table edges is not a comfortable thing add potholder to the edge of table 四 layout design of classroom Available width 780 30 2 720cm Due to 二 2 11 A student occupy of width 60cm the left and right aisle are 80cm part 4 people per row Available length Left 90 92 8 70 896cm Right 154 92 8 70 960cm Due to 二 2 5 the distance of two desk is 95cm and there are 7 row right 960 95 7 295cm Considering the original classroom right of first row distance platform 150cm here person flow is larger and sometimes this place can take as a stage classroom performance applicable is design for 175cm so the last row of the distance from the wall is 295 175 26 4 93 6 93 6cm is sligh