JPS6120234Y2 - - Google Patents

Info

Publication number

JPS6120234Y2

JPS6120234Y2 JP7385781U JP7385781U JPS6120234Y2 JP S6120234 Y2 JPS6120234 Y2 JP S6120234Y2 JP 7385781 U JP7385781 U JP 7385781U JP 7385781 U JP7385781 U JP 7385781U JP S6120234 Y2 JPS6120234 Y2 JP S6120234Y2

Authority

JP

Japan

Prior art keywords

door body

lower horizontal

reinforcing frame

horizontal frames

frames

Prior art date

1981-05-20

Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Links

• Espacenet
• Global Dossier
• Discuss

• 239000000463 material Substances 0.000 claims description 30
• 230000003014 reinforcing effect Effects 0.000 claims description 15
• 239000002184 metal Substances 0.000 claims description 4
• 238000003780 insertion Methods 0.000 description 4
• 230000037431 insertion Effects 0.000 description 4
• 230000007547 defect Effects 0.000 description 2
• 238000003466 welding Methods 0.000 description 2
• 229910000831 Steel Inorganic materials 0.000 description 1
• 238000005452 bending Methods 0.000 description 1
• 238000004519 manufacturing process Methods 0.000 description 1
• 239000007769 metal material Substances 0.000 description 1
• 230000002093 peripheral effect Effects 0.000 description 1
• 230000002787 reinforcement Effects 0.000 description 1
• 239000010959 steel Substances 0.000 description 1
• 239000002023 wood Substances 0.000 description 1