CA2142937A1 - Stress relief door frame - Google Patents
Stress relief door frameInfo
- Publication number
- CA2142937A1 CA2142937A1 CA 2142937 CA2142937A CA2142937A1 CA 2142937 A1 CA2142937 A1 CA 2142937A1 CA 2142937 CA2142937 CA 2142937 CA 2142937 A CA2142937 A CA 2142937A CA 2142937 A1 CA2142937 A1 CA 2142937A1
- Authority
- CA
- Canada
- Prior art keywords
- frame
- post
- door
- posts
- inner frame
- Prior art date
- 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.)
- Abandoned
Links
- 230000008878 coupling Effects 0.000 claims abstract description 7
- 238000010168 coupling process Methods 0.000 claims abstract description 7
- 238000005859 coupling reaction Methods 0.000 claims abstract description 7
- 230000006835 compression Effects 0.000 claims description 8
- 238000007906 compression Methods 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 abstract description 2
- 238000009434 installation Methods 0.000 description 4
- 239000011521 glass Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E06—DOORS, WINDOWS, SHUTTERS, OR ROLLER BLINDS IN GENERAL; LADDERS
- E06B—FIXED OR MOVABLE CLOSURES FOR OPENINGS IN BUILDINGS, VEHICLES, FENCES OR LIKE ENCLOSURES IN GENERAL, e.g. DOORS, WINDOWS, BLINDS, GATES
- E06B1/00—Border constructions of openings in walls, floors, or ceilings; Frames to be rigidly mounted in such openings
- E06B1/56—Fastening frames to the border of openings or to similar contiguous frames
- E06B1/60—Fastening frames to the border of openings or to similar contiguous frames by mechanical means, e.g. anchoring means
- E06B1/6084—Mounting frames elastically, e.g. with springs or other elastic material, between the wall and the frame
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Wing Frames And Configurations (AREA)
- Hinges (AREA)
Abstract
A door and door frame assembly includes a rectangular door with a rectangular door frame surrounding the door for mounting in the frame of a building. The door frame is formed in two separate elements an inner frame adjacent the peripheral edge of the door and outer frame surrounding the inner frame. Both the inner and outer frame are formed from channel members with the web of the channel members of the inner frame adjacent the edge of the door. The web of the outer frame faces away from the door and the inner frame members are slideable inside the outer frame members. the inner frame is attached to the outer frame by a plurality of spring couplings which extend radially outwardly and are compressible or twistable to accommodate movement of the outer frame while the inner frame remains basically stationary and rectangular. The structure accommodates the dramatic shifts which are common in buildings mounted on permafrost.
Description
STRESS RELIEF DOOR FRAME
This invention relates to a door or window frame which is particularly adapted for installation in buildings where there is a high level of shifting of the building frame. While the remainder of this 5 specification refers to doors it will be appreciated that the invention described herein can relate either to frames for doors where the problem is most prevalent or to frames for windows.
Most buildings are structured in order to limit or avoid relative movement between different parts of the frame of the building.
10 However in the cold regions of Canada and other countries where there is permafrost, it is extremely difficult to prevent relative movement between the elements of the frame of the building as temperature changes in the permafrost cause dramatic expansion and contraction of the support structure on which the building is located. Even using 15 foundation piles, it is extremely difficult to restrict this movement.
As some portions of the building area are subject to more vertical movement than others, there is relative movement between different parts of the building and thus relative movement between different parts of door frames. This movement effects twisting of the 20 door frame. In relatively small amounts of twisting the movement simply causes binding of the doors. In other cases the amount of movement is more dramatic and it is essential to provide adjustment in order to provide an operable door structure. Until now the door structure has been of a conventional nature, simply including a header and door jambs 25 which are attached to the building frame. In most cases there is simply not enough adjustment clearance designed into this conventional structure to allow the door location in the frame to be adjusted to accommodate the twisting action.
This invention relates to a door or window frame which is particularly adapted for installation in buildings where there is a high level of shifting of the building frame. While the remainder of this 5 specification refers to doors it will be appreciated that the invention described herein can relate either to frames for doors where the problem is most prevalent or to frames for windows.
Most buildings are structured in order to limit or avoid relative movement between different parts of the frame of the building.
10 However in the cold regions of Canada and other countries where there is permafrost, it is extremely difficult to prevent relative movement between the elements of the frame of the building as temperature changes in the permafrost cause dramatic expansion and contraction of the support structure on which the building is located. Even using 15 foundation piles, it is extremely difficult to restrict this movement.
As some portions of the building area are subject to more vertical movement than others, there is relative movement between different parts of the building and thus relative movement between different parts of door frames. This movement effects twisting of the 20 door frame. In relatively small amounts of twisting the movement simply causes binding of the doors. In other cases the amount of movement is more dramatic and it is essential to provide adjustment in order to provide an operable door structure. Until now the door structure has been of a conventional nature, simply including a header and door jambs 25 which are attached to the building frame. In most cases there is simply not enough adjustment clearance designed into this conventional structure to allow the door location in the frame to be adjusted to accommodate the twisting action.
- 2- 21~29~1 -At the present time, therefore, the problem is dealt with by providing extreme adjustments to the door including cutting down the door in size so that it is smaller than the door frame which of course provides gaps which are unsightly and prevent proper sealing. In addition to preventing binding, it is also necessary to properly locate the door lock and associated striker plate to provide proper locking of the door.
SUMMARY OF THE INVENTION
It is one object of the present invention, therefore, to provide an improved door frame arrangement which reduces or overcomes the problems of significant movement in the building frame.
According to the invention, therefore, there is provided a door frame structure comprising an outer frame having two vertical posts for attachment to a frame of a building with each post along a respective side of a doorway of the building, a substantially rigid, rectangular inner frame having a horizontal header and two vertical posts for surrounding the doorway and for receiving a rectangular door closely fit in the inner frame, one of the posts of the inner frame being arranged for receiving hinges of the door and the other of the posts being arranged for receiving a striker plate of a door lock of the door, and connecting means connecting the inner frame to the outer frame, said connecting means being flexible to allow movement of each of the posts of the inner frame longitudinally relative to the respective posts of the outer frame to accommodate shifting of the frame of the building.
Preferably the coupling means includes for each post of the inner frame and the respective post of the outer frame a plurality of interconnecting coil springs at spaced positions therealong, each spring -3~ 214~937 bridging a space between the post of the inner frame and the respective post of the outer frame.
Preferablv the connecting means defines a space between the post of the inner frame and the respective post of the outer frame 5 allowing movement therebetween in both a vertical and a horizontal direction.
Preferably the inner frame includes a sill interconnecting the posts of the inner frame at bottom ends thereof such that the posts, the horizontal sill and the horizontal header form a rigid structure.
Preferably each of the posts of the outer frame comprises a channel member having an outer web and a pair of side walls at right angles to the outer web, each of the side walls Iying in a vertical plane parallel to a plane of the doorway, the posts of the inner frame being arranged within the channel member with a space between the outer 15 web and an outer surface of the inner post and the inner post being moveable in horizontal and vertical directions relative to the outer post within the channel member and the posts of the inner frame each comprise a channel member having an inner web and a pair of side walls with each of the side walls Iying in a vertical plane parallel to the plane of 20 the doorway, the side walls of the post of the inner frame being slideable inside the side walls of the post of the outer frame with the space being defined between the inner web of the post of the inner frame and the outer web of the post of the outer frame.
The preferable spring assemblies defined above therefore 25 maintain a constant pressure between the inner frame and the outer ~ - frame keeping the door generally centered in a manner which is sufficient to relieve the door of the stress from the immediate frame members to which the door frame structure is attached.
SUMMARY OF THE INVENTION
It is one object of the present invention, therefore, to provide an improved door frame arrangement which reduces or overcomes the problems of significant movement in the building frame.
According to the invention, therefore, there is provided a door frame structure comprising an outer frame having two vertical posts for attachment to a frame of a building with each post along a respective side of a doorway of the building, a substantially rigid, rectangular inner frame having a horizontal header and two vertical posts for surrounding the doorway and for receiving a rectangular door closely fit in the inner frame, one of the posts of the inner frame being arranged for receiving hinges of the door and the other of the posts being arranged for receiving a striker plate of a door lock of the door, and connecting means connecting the inner frame to the outer frame, said connecting means being flexible to allow movement of each of the posts of the inner frame longitudinally relative to the respective posts of the outer frame to accommodate shifting of the frame of the building.
Preferably the coupling means includes for each post of the inner frame and the respective post of the outer frame a plurality of interconnecting coil springs at spaced positions therealong, each spring -3~ 214~937 bridging a space between the post of the inner frame and the respective post of the outer frame.
Preferablv the connecting means defines a space between the post of the inner frame and the respective post of the outer frame 5 allowing movement therebetween in both a vertical and a horizontal direction.
Preferably the inner frame includes a sill interconnecting the posts of the inner frame at bottom ends thereof such that the posts, the horizontal sill and the horizontal header form a rigid structure.
Preferably each of the posts of the outer frame comprises a channel member having an outer web and a pair of side walls at right angles to the outer web, each of the side walls Iying in a vertical plane parallel to a plane of the doorway, the posts of the inner frame being arranged within the channel member with a space between the outer 15 web and an outer surface of the inner post and the inner post being moveable in horizontal and vertical directions relative to the outer post within the channel member and the posts of the inner frame each comprise a channel member having an inner web and a pair of side walls with each of the side walls Iying in a vertical plane parallel to the plane of 20 the doorway, the side walls of the post of the inner frame being slideable inside the side walls of the post of the outer frame with the space being defined between the inner web of the post of the inner frame and the outer web of the post of the outer frame.
The preferable spring assemblies defined above therefore 25 maintain a constant pressure between the inner frame and the outer ~ - frame keeping the door generally centered in a manner which is sufficient to relieve the door of the stress from the immediate frame members to which the door frame structure is attached.
-4~ 21429~7 -When the building shifts or vertically jacks in an area that affects at least part of the door frame, the door in its sub frame is free to move with no compression on the door itself as would be the case with a conventional door mounting arrangement. The striker plate mounted on the inner frame travel with the door and its frame thus maintaining the lock and the striker plate in proper registration. The user is thus freed from the high demand of regular maintenance and adjustment that conventional doors require in the permafrost regions. In addition there is little or no breakage of glass in doors of type including glass panels which is due to the compression of the door in the conventional arrangement.
One embodiment of the invention will now be described in conjunction with the accompanying drawings in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a front elevational view of a door and door frame assembly according to the present invention showing one part broken away.
Figure 2 is a cross-sectional view on an enlarged scale of the broken away part of Figure 1.
Figure 3 is an isometric exploded view of one side of the inner frame and one post of the outer frame of Figure 1.
Figure 4 is an isometric view on an enlarged scale of a portion only of the frame structure of Figure 1, that portion being indicated at 4.
Figure 5 is a cross-sectional view along the lines 5-5 of Figure 1 on an enlarged scale.
In the drawings like characters of reference indicate corresponding parts in the different figures.
~ 5~ 2142937 -DETAILED DESCRIPTION
The door and door frame assembly of the present invention comprises a door 10 which is rectangular with two sides edges 11 and 12, a top edge 13 and a bottom edge 14. The door includes a plurality of hinges 16 along one side edge 12 and a locking assembly 17 for cooperating with the striker plate 18 on the door frame. The locking assembly 17 is operated by a handle 19. The construction of the door is generally of a conventional nature and may or may not include glass panels as required. Conventional materials can be used.
The assembly further includes a door frame generally indicated at 20 including an inner frame structure 21 and an outer frame structure 22.
The inner frame structure 21 is formed from four elongate members connected at four corners to form a rigid rectangular frame structure directly surrounding the door. Thus the inner frame structure comprises two posts 23 and 24, a horizontal sill or bottom rail 25 and a horizontal header or top rail 26. Each of the members is formed from a channel defining an inner web 27 and two side walls 28 and 29 leaving an open outer face facing away from the door. The web 27 lies immediately adjacent the peripheral edge of the door and the inner web 27 can carry a door stop to locate the door in the inner frame. The side walls 28 and 29 lie in parallel vertical planes which are also parallel to the general plane of the door or the doorway defined inside the frame.
Each of the four members defining the inner frame is mitered at its ends to form a miter joint 31 rigidly connecting the members together. The miter joint is closed by a plate 32 which bridges the miter joint on each of the side walls 28, 29 and is screw fastened to the respective side wall of the membet to hold the members together at the miter joint 31.
- 6- 21~937 -Alternatively the members can be welded or fastened by other types of plate.
The outer frame 22 is formed from four separate frame members including two outer posts 35 and 36, a horizontal bottom rail or S sill 37 and a horizontal top rail or header 38. Each of the members is again formed from a channel structure which is rotated through 180 degrees relative to the channel member of the inner frame so as to face inwardly as best shown in Figures 3 and 5. Thus the channel member includes a web 39 and two side walls 40 and 41. The dimensions of the 10 channel member forming the outer frame are slightly wider than that of the inner frame so that, as best shown in Figure 5, the channel member forming the outer frame receives the channel member forming the inner frame inside the outer frame. Thus the side walls 28 and 29 slide inside the side walls 40 and 41 as a loose fit. The channel members forming 15 the outer frame are again mitered at the ends but are not connected at the ends so that there is basically no interconnection between the members of the outer frame.
The inner frame is connected to the outer frame by a plurality of coupling elements 40. Thus each post of the inner frame is 20 connected to a respective one of the posts of the outer frame by two or more of the coupling elements 40 and similarly the horizontal header and horizontal sill of the inner frame are connected respectively to the header and sill of the outer frame by the coupling elements 40.
Each coupling element 40 comprises a projecting member 25 50 formed on the inside surface of the web 27 of the inner frame. The projecting member 50 formed as a sleeve defined by punching the web 27 or by welding a separate tubular element onto the inside surface of the web 27. The sieeve 50 extends inwardly of the web 27 to a height slightly less than the height of the top edge 28A of the side walls 28 and 29. At the top of the projecting member is provided a nut 51 which is welded to the projecting member in fixed position and defines an axis of the nut at right angles to web 27.
S The web 39 has a hole 52 aligned with the nut 51 so that the bolt 53 can pass through the hole 52 and engage into the nut 51 in a clamping action.
As shown in Figure 5, the clamping assembly provided by the nut 51 and the bolt 53 is clamped down tight to pull the web 39 toward the web 27 thus collapsing the inner frame into the outer frame.
In Figure 2 the structure is shown in the expanded condition where the bolt 53 is released from the nut 51 hole 52.
The projecting member 50 is surrounded by a compression spring 55 which coaxially surrounds the projecting member and is held on the projecting member as a friction fit. The spring extends beyond the end of the projecting member into engagement with the inside surface of the web 39. An opposed end of the spring presses against the inside surface of the web 27.
In a position shown in Figure 5, the spring is fully compressed until the top edges 28A of the side walls 28 and 29 engage the inside surface of the web 39. In Figure 2 the spring is fully expanded so as to hold the webs 27 and 39 as far apart as is required to relax the spring. The projecting member holds the spring in position and retains it so that its axis remains at right angles to the surfaces of the webs 27 and 39.
When the outside frame is clamped into the position shown in Figure 5, the mitered ends of the channel members forming the frame -8- 21~29~7 -are abutting and the arrangement can be shipped and prepared for installation in this construction.
When it is intended to install the door frame and the door assembly, the door frame with the outer frame compressed into the 5 position shown in Figure 5 is inserted into the opening in the frame of the building. In this position, the heads of the bolts 53 are accessed and the bolts unscrewed to release the outer frame so that it expands outwardly to engage the frame of the building. The frame of the building may be adapted to allow access to the bolts and indeed to allow the bolts to be 10 removed if required. In any event the bolts are released to the position shown in Figure 2 in which the bolt is released from the nut 51. In this position, the outer frame is held basically in position by its engagement with the frame of the building and this supports the inner frame inside the outer frame. As the only engagement between the inner frame and 15 the outer frame is however provided by the springs, the inner frame can move freely relative to the outer frame by compression of those springs.
Thus if one of the posts of the outer frame is raised by shifting of the frame of the building, the rigid structure of the inner frame holds the inner frame in position without stressing the door itself while the inner 20 frame remains accurately rectangular. The springs are therefore deformed to accommodate this movement by twisting action of the spring as the outer frame moves upwardly or downwardly relative to the stationary inner frame. In addition the upward movement of the frame of the building can act to compress the springs at the header or sill as 25 required to retain the inner frame rectangular and stationary as the outer frame moves with the building.
Other types of springs such as leaf springs can also be used in place of the compression springs as shown.
9 21~2937 -In addition the double frame assembly provided by the inner and outer frames can be designed and utilized using posts, header and sill of both the inner and outer frames or can be provided simply by the posts and header leaving the sill of the installation much the same as a S conventional installation. In this case both member of the double frame can be fastened securely to the building structure at the bottom.
The frame can be covered using facing plates against both of the side walls of the webs to cover the junction between the inner and outer frames to provide a conventional appearance surrounding the door.
10 the facing plates can be screwed to the channel members and attached to the frame of the building to assist in holding the door frame and door assembly in position.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments 15 are possible within the scope of the invention. The invention is to be considered limited solely by the scope of the appended claims.
One embodiment of the invention will now be described in conjunction with the accompanying drawings in which:
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a front elevational view of a door and door frame assembly according to the present invention showing one part broken away.
Figure 2 is a cross-sectional view on an enlarged scale of the broken away part of Figure 1.
Figure 3 is an isometric exploded view of one side of the inner frame and one post of the outer frame of Figure 1.
Figure 4 is an isometric view on an enlarged scale of a portion only of the frame structure of Figure 1, that portion being indicated at 4.
Figure 5 is a cross-sectional view along the lines 5-5 of Figure 1 on an enlarged scale.
In the drawings like characters of reference indicate corresponding parts in the different figures.
~ 5~ 2142937 -DETAILED DESCRIPTION
The door and door frame assembly of the present invention comprises a door 10 which is rectangular with two sides edges 11 and 12, a top edge 13 and a bottom edge 14. The door includes a plurality of hinges 16 along one side edge 12 and a locking assembly 17 for cooperating with the striker plate 18 on the door frame. The locking assembly 17 is operated by a handle 19. The construction of the door is generally of a conventional nature and may or may not include glass panels as required. Conventional materials can be used.
The assembly further includes a door frame generally indicated at 20 including an inner frame structure 21 and an outer frame structure 22.
The inner frame structure 21 is formed from four elongate members connected at four corners to form a rigid rectangular frame structure directly surrounding the door. Thus the inner frame structure comprises two posts 23 and 24, a horizontal sill or bottom rail 25 and a horizontal header or top rail 26. Each of the members is formed from a channel defining an inner web 27 and two side walls 28 and 29 leaving an open outer face facing away from the door. The web 27 lies immediately adjacent the peripheral edge of the door and the inner web 27 can carry a door stop to locate the door in the inner frame. The side walls 28 and 29 lie in parallel vertical planes which are also parallel to the general plane of the door or the doorway defined inside the frame.
Each of the four members defining the inner frame is mitered at its ends to form a miter joint 31 rigidly connecting the members together. The miter joint is closed by a plate 32 which bridges the miter joint on each of the side walls 28, 29 and is screw fastened to the respective side wall of the membet to hold the members together at the miter joint 31.
- 6- 21~937 -Alternatively the members can be welded or fastened by other types of plate.
The outer frame 22 is formed from four separate frame members including two outer posts 35 and 36, a horizontal bottom rail or S sill 37 and a horizontal top rail or header 38. Each of the members is again formed from a channel structure which is rotated through 180 degrees relative to the channel member of the inner frame so as to face inwardly as best shown in Figures 3 and 5. Thus the channel member includes a web 39 and two side walls 40 and 41. The dimensions of the 10 channel member forming the outer frame are slightly wider than that of the inner frame so that, as best shown in Figure 5, the channel member forming the outer frame receives the channel member forming the inner frame inside the outer frame. Thus the side walls 28 and 29 slide inside the side walls 40 and 41 as a loose fit. The channel members forming 15 the outer frame are again mitered at the ends but are not connected at the ends so that there is basically no interconnection between the members of the outer frame.
The inner frame is connected to the outer frame by a plurality of coupling elements 40. Thus each post of the inner frame is 20 connected to a respective one of the posts of the outer frame by two or more of the coupling elements 40 and similarly the horizontal header and horizontal sill of the inner frame are connected respectively to the header and sill of the outer frame by the coupling elements 40.
Each coupling element 40 comprises a projecting member 25 50 formed on the inside surface of the web 27 of the inner frame. The projecting member 50 formed as a sleeve defined by punching the web 27 or by welding a separate tubular element onto the inside surface of the web 27. The sieeve 50 extends inwardly of the web 27 to a height slightly less than the height of the top edge 28A of the side walls 28 and 29. At the top of the projecting member is provided a nut 51 which is welded to the projecting member in fixed position and defines an axis of the nut at right angles to web 27.
S The web 39 has a hole 52 aligned with the nut 51 so that the bolt 53 can pass through the hole 52 and engage into the nut 51 in a clamping action.
As shown in Figure 5, the clamping assembly provided by the nut 51 and the bolt 53 is clamped down tight to pull the web 39 toward the web 27 thus collapsing the inner frame into the outer frame.
In Figure 2 the structure is shown in the expanded condition where the bolt 53 is released from the nut 51 hole 52.
The projecting member 50 is surrounded by a compression spring 55 which coaxially surrounds the projecting member and is held on the projecting member as a friction fit. The spring extends beyond the end of the projecting member into engagement with the inside surface of the web 39. An opposed end of the spring presses against the inside surface of the web 27.
In a position shown in Figure 5, the spring is fully compressed until the top edges 28A of the side walls 28 and 29 engage the inside surface of the web 39. In Figure 2 the spring is fully expanded so as to hold the webs 27 and 39 as far apart as is required to relax the spring. The projecting member holds the spring in position and retains it so that its axis remains at right angles to the surfaces of the webs 27 and 39.
When the outside frame is clamped into the position shown in Figure 5, the mitered ends of the channel members forming the frame -8- 21~29~7 -are abutting and the arrangement can be shipped and prepared for installation in this construction.
When it is intended to install the door frame and the door assembly, the door frame with the outer frame compressed into the 5 position shown in Figure 5 is inserted into the opening in the frame of the building. In this position, the heads of the bolts 53 are accessed and the bolts unscrewed to release the outer frame so that it expands outwardly to engage the frame of the building. The frame of the building may be adapted to allow access to the bolts and indeed to allow the bolts to be 10 removed if required. In any event the bolts are released to the position shown in Figure 2 in which the bolt is released from the nut 51. In this position, the outer frame is held basically in position by its engagement with the frame of the building and this supports the inner frame inside the outer frame. As the only engagement between the inner frame and 15 the outer frame is however provided by the springs, the inner frame can move freely relative to the outer frame by compression of those springs.
Thus if one of the posts of the outer frame is raised by shifting of the frame of the building, the rigid structure of the inner frame holds the inner frame in position without stressing the door itself while the inner 20 frame remains accurately rectangular. The springs are therefore deformed to accommodate this movement by twisting action of the spring as the outer frame moves upwardly or downwardly relative to the stationary inner frame. In addition the upward movement of the frame of the building can act to compress the springs at the header or sill as 25 required to retain the inner frame rectangular and stationary as the outer frame moves with the building.
Other types of springs such as leaf springs can also be used in place of the compression springs as shown.
9 21~2937 -In addition the double frame assembly provided by the inner and outer frames can be designed and utilized using posts, header and sill of both the inner and outer frames or can be provided simply by the posts and header leaving the sill of the installation much the same as a S conventional installation. In this case both member of the double frame can be fastened securely to the building structure at the bottom.
The frame can be covered using facing plates against both of the side walls of the webs to cover the junction between the inner and outer frames to provide a conventional appearance surrounding the door.
10 the facing plates can be screwed to the channel members and attached to the frame of the building to assist in holding the door frame and door assembly in position.
While one embodiment of the present invention has been described in the foregoing, it is to be understood that other embodiments 15 are possible within the scope of the invention. The invention is to be considered limited solely by the scope of the appended claims.
Claims (15)
1. A door frame structure comprising an outer frame having two vertical posts for attachment to a frame of a building with each post along a respective side of a doorway of the building, a substantially rigid, rectangular inner frame having a horizontal header and two vertical posts for surrounding the doorway and for receiving a rectangular door closely fit in the inner frame, one of the posts of the inner frame being arranged for receiving hinges of the door and the other of the posts being arranged for receiving a striker plate of a door lock of the door, and connecting means connecting the inner frame to the outer frame, said connecting means being flexible to allow movement of each of the posts of the inner frame longitudinally relative to the respective posts of the outer frame to accommodate shifting of the frame of the building.
2. The door frame according to Claim 1 wherein the coupling means includes for each post of the inner frame and the respective post of the outer frame a plurality of interconnecting elements at spaced positions therealong, each element bridging a space between the post of the inner frame and the respective post of the outer frame.
3. The door frame according to Claim 2 wherein each of the elements comprises a spring.
4. The door frame according to Claim 1, 2 or 3 wherein the connecting means defines a space between the post of the inner frame and the respective post of the outer frame allowing movement therebetween in both a vertical and a horizontal direction.
5. The door frame according to Claim 1, 2 or 3 wherein the outer frame includes a horizontal header and wherein the connecting means includes a plurality of elements extending between the header of the inner frame and the header of the outer frame.
6. The door frame according to Claim 5 wherein the header of the outer frame is arranged relative to the posts of the outer frame to allow relative movement therebetween in both horizontal and vertical directions.
7. The door frame according to Claim 1, 2 or 3 wherein the inner frame includes a sill interconnecting the posts of the inner frame at bottom ends thereof such that the posts, the horizontal sill and the horizontal header form a rigid structure.
8. The door frame according to Claim 7 wherein the outer frame includes a horizontal sill and wherein the connecting means includes a plurality of elements connected between the sill of the inner frame and the sill of the outer frame.
9. The door frame according to Claim 1, 2 or 3 wherein each of the posts of the outer frame comprises a channel member having an outer web and a pair of side walls at right angles to the outer web, each of the side walls lying in a vertical plane parallel to a plane of the doorway, the posts of the inner frame being arranged within the channel member with a space between the outer web and an outer surface of the inner post and the inner post being moveable in horizontal and vertical directions relative to the outer post within the channel member.
10. The door frame according to Claim 9 wherein the posts of the inner frame each comprise a channel member having an inner web and a pair of side walls with each of the side walls lying in a vertical plane parallel to the plane of the doorway, the side walls of the post of the inner frame being slideable inside the side walls of the post of the outer frame with the space being defined between the inner web of the post of the inner frame and the outer web of the post of the outer frame.
11. The door frame according to Claim 1, 2 or 3 wherein each post of the inner frame is spaced horizontally from the respective post of the outer frame and wherein is provided clamping means for pulling the post of the outer frame inwardly toward the post of the inner frame.
12. The door frame according to Claim 11 wherein the connecting means comprises a plurality of compression springs arranged at spaced positions along the length of each of the inner posts and extending from the inner post to the outer post.
13. The door frame according to Claim 1 wherein the connecting means comprises a plurality of compression springs arranged at spaced positions along the length of each of the posts of the inner frame and extending from the post of the inner frame to the post of the outer frame.
14. The door frame according to Claim 12 or 13 wherein either an outer surface of the post of the inner frame or an inner surface of the post of the outer frame carries a raised projection projecting toward the other of the surfaces with the compression spring being engaged around the projection.
15. The door frame according to Claim 12 wherein an outer surface of the post of the inner frame carries a projection projecting outwardly toward a wall of the post of the outer frame and wherein the clamping means comprises a bolt extending through the wall of the post of the outer frame and clamping to the projection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2142937 CA2142937A1 (en) | 1995-02-20 | 1995-02-20 | Stress relief door frame |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2142937 CA2142937A1 (en) | 1995-02-20 | 1995-02-20 | Stress relief door frame |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2142937A1 true CA2142937A1 (en) | 1996-08-21 |
Family
ID=4155269
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2142937 Abandoned CA2142937A1 (en) | 1995-02-20 | 1995-02-20 | Stress relief door frame |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2142937A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403789A (en) * | 2018-11-08 | 2019-03-01 | 孔含之 | A kind of waterproof assembling structure of aluminium alloy structure engineering |
| CN113153070A (en) * | 2021-04-06 | 2021-07-23 | 中国十七冶集团有限公司 | Door frame of door opening of civil air defense in nuclear industry and installation method thereof |
| CN114382384A (en) * | 2021-12-24 | 2022-04-22 | 青岛博海建设集团有限公司 | Air cushion type external window accurate positioning and mounting method |
-
1995
- 1995-02-20 CA CA 2142937 patent/CA2142937A1/en not_active Abandoned
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109403789A (en) * | 2018-11-08 | 2019-03-01 | 孔含之 | A kind of waterproof assembling structure of aluminium alloy structure engineering |
| CN113153070A (en) * | 2021-04-06 | 2021-07-23 | 中国十七冶集团有限公司 | Door frame of door opening of civil air defense in nuclear industry and installation method thereof |
| CN113153070B (en) * | 2021-04-06 | 2022-05-13 | 中国十七冶集团有限公司 | Door frame of door opening of civil air defense in nuclear industry and installation method thereof |
| CN114382384A (en) * | 2021-12-24 | 2022-04-22 | 青岛博海建设集团有限公司 | Air cushion type external window accurate positioning and mounting method |
| CN114382384B (en) * | 2021-12-24 | 2024-03-22 | 青岛博海建设集团有限公司 | Air cushion type external window accurate positioning and mounting device and positioning and mounting method thereof |
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| Date | Code | Title | Description |
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| EEER | Examination request | ||
| FZDE | Dead |