Insertion frame structure and housing using same

Patent metadata

Field	Value
Publication number	US-9624952-B2
Application number	US-201214116558-A
Country	US
Kind code	B2
Filing date	Jun 11, 2012
Priority date	Jun 13, 2011
Publication date	Apr 18, 2017
Grant date	Apr 18, 2017

Abstract

To enhance the positioning accuracy between primary members and auxiliary members without need of latch parts such as rivets, an insertion frame structure includes: a pair of primary members having L-shaped cross-sections and placed with the L shapes facing to each other symmetrically; and several auxiliary members having angular U-shaped cross-sections between the primary members. The primary members and the auxiliary members are joined at latch portions. The latch portions of the primary members have clearance-shaped latch holes. The latch portions of the auxiliary members have convex portions to be inserted into the latch holes. Each latch hole has a clearance with a larger dimension than a plate thickness t of the auxiliary members, and continuously from the clearance, a clearance with a dimension smaller than the plate thickness t of the auxiliary members.

First claim

The invention claimed is:

1. An insertion frame structure comprising:
a pair of primary members whose cross-sectional shapes possess an L shaped portion, each of the primary members comprising a bottom surface side and an inner surface side extending from the bottom surface side to form the L-shaped portion, and the pair of primary members being separated by a predetermined distance such that the inner surface sides of the each of the primary members face each other symmetrically with respect to a center line passing the midpoint of the predetermined distance; and
a plurality of auxiliary members whose cross-sectional shapes are groove-shaped so that each of the auxiliary members comprises a bottom portion, a first side portion extending from the bottom portion, and a second side portion extending from the bottom portion to form the groove-shape with an open top portion, and each of the auxiliary members being placed between the primary members, wherein
the primary members and the auxiliary members are joined with each other at latch portions,
the latch portions of the primary members each have a latch hole,
the latch portions of the auxiliary members each have a convex portion to be inserted into the latch hole, and
each of the latch holes has a first clearance area and a second clearance area extending continuously from the first clearance area, the first clearance area being larger than a plate thickness of each of the auxiliary members, and the second clearance area being equal to or smaller than the plate thickness of each of the auxiliary members.

2. The insertion frame structure according to claim 1 , wherein a contact avoiding portion is formed by obliquely cutting a lower portion of the convex portion so that the auxiliary member will not contact the primary member at the contact avoiding portion upon insertion of the convex portion into the latch hole.

3. The insertion frame structure according to claim 1 , wherein the convex portions are formed so as not to protrude outward from the latch holes.

4. The insertion frame structure according to claim 1 , wherein the plurality of auxiliary members comprises a first auxiliary member and a second auxiliary member, the insertion frame structure further comprising:
a third auxiliary member having an L shaped portion, the third auxiliary member being placed between the first and second auxiliary members, wherein
the first and second auxiliary members each have a second latch hole comprising a third clearance area and a fourth clearance area extending continuously from the third clearance area, the third clearance area being larger than a plate thickness of the second auxiliary member and the fourth clearance area being equal to or smaller than the plate thickness of the second auxiliary member, and
the second auxiliary member has a convex portion to be fitted into the second latch hole.

5. The insertion frame structure according to claim 1 , wherein the latch holes are in both the bottom surface and the inner side surface of each of the primary members.

6. The insertion frame structure according to claim 1 , wherein an entirety of the cross-sectional shape of each of the primary members is L-shaped.

7. A housing which is a sheet metal housing formed by sheet metal, an insertion frame structure being fixed on an inner side surface of the housing by welding, wherein
the insertion frame structure includes:
a pair of primary members whose cross-sectional shapes possess an L shaped portion, each of the primary members comprising a bottom surface side and an inner surface side extending from the bottom surface side to form the L-shape portion, and the pair of primary members being separated by a predetermined distance such that the inner surface sides of the each of the primary members face each other symmetrically with respect to a center line passing the midpoint of the predetermined distance; and
a plurality of auxiliary members whose cross-sectional shapes are groove-shaped so that each of the auxiliary members comprises a bottom portion, a first side portion extending from the bottom portion, and a second side portion extending from the bottom portion to form the groove-shape with an open top portion, and each of the auxiliary members being placed between the primary members, and wherein

the primary members and the auxiliary members are joined with each other at latch portions,
the latch portions of the primary members each have a latch hole,
the latch portions of the auxiliary members each have a convex portion to be inserted into the latch hole, and
each of the latch holes has a first clearance area and a second clearance area extending continuously from the first clearance area, the first clearance area being larger than a plate thickness of each of the auxiliary members, and the second clearance area being equal to or smaller than the plate thickness of each of the auxiliary members, wherein
each of the auxiliary members is groove-shaped so that each of the auxiliary members comprises a bottom portion, a first side portion extending from the bottom portion, and a second side portion extending from the bottom portion to form the groove-shape with an open top portion.

8. The housing according to claim 7 , wherein the latch holes are in both the bottom surface and the inner side surface of each of the primary members.

9. The housing according to claim 7 , wherein an entirety of the cross-sectional shape of each of the primary members is L-shaped.

10. A housing which is a sheet metal housing formed by sheet metal, an insertion frame structure being fixed on the inner side surface of the housing by welding, wherein
the insertion frame structure includes:
a pair of groove-shaped primary members, each of the groove-shaped primary members comprising a bottom portion, a first side portion extending from the bottom portion, and a second side portion extending from the bottom portion to form the groove-shape with an open top portion, the pair of primary members being separated by a predetermined distance and facing each other symmetrically with respect to a center line passing the midpoint of the predetermined distance, and the first side portion of each of the groove-shaped primary members being closer to the center line than the second side portion of each of the groove-shaped members; and
a plurality of auxiliary members whose cross-sectional shapes possess an L shaped portion, and which are placed between the primary members, and wherein

the primary members and the auxiliary members are joined with each other at latch portions, the latch portions including primary member latch portions and auxiliary member latch portions,
the primary members are placed with the bottom portion of the groove shape facing downward,
at the primary member latch portion of each of the primary members, the height of the first side portion is lower than the height of the second side portion,
at the primary member latch portion of each of the primary members, latch holes are formed on the bottom portion, the first side portion, and the second side portion,
the auxiliary member latch portion of each of the auxiliary member has: a first convex portion to be inserted into the latch hole formed on the second side portion; a second convex portion to be inserted into the latch hole formed on the bottom portion; and a third convex portion to be inserted into the latch hole formed on the first side portion, and
each of the latch holes formed in the bottom portion, the first side portion, and the second side portion of each of the primary members includes a first clearance area and a second clearance area extending continuously from the first clearance area, the first clearance area

Assignees

• Hayashi Tomoyuki
• Hashizume Kenichi
• Urakawa Masatoshi
• Uto Taichi
• Mitsubishi Electric Corp

Inventors

• Hayashi Tomoyuki
• Hashizume Kenichi
• Urakawa Masatoshi
• Uto Taichi

Classifications

• F16B7/0446

  for tubes using the innerside thereof (F16B7/025 takes precedence) · CPC title

• F16B7/20 Primary

  using bayonet connections · CPC title

• E04B2/766

  T-connections · CPC title

• E04B1/5818

  of substantially U - form · CPC title

• E04B2/765

  with one continuous profile, the perpendicular one being interrupted · CPC title