CA1044432A - Plastic clamp for connecting a pair of frame metal sections - Google Patents
Plastic clamp for connecting a pair of frame metal sectionsInfo
- Publication number
- CA1044432A CA1044432A CA270,193A CA270193A CA1044432A CA 1044432 A CA1044432 A CA 1044432A CA 270193 A CA270193 A CA 270193A CA 1044432 A CA1044432 A CA 1044432A
- Authority
- CA
- Canada
- Prior art keywords
- pair
- piece
- hole
- clamp
- pawl
- 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.)
- Expired
Links
- 239000002184 metal Substances 0.000 title claims abstract description 36
- 238000010079 rubber tapping Methods 0.000 claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 4
- 210000005069 ears Anatomy 0.000 claims 1
- 230000003455 independent Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B1/5837—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially circular form
- E04B1/585—Connections for building structures in general of bar-shaped building elements with a closed cross-section of substantially circular form with separate connection devices
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B2/00—Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
- E04B2/74—Removable non-load-bearing partitions; Partitions with a free upper edge
- E04B2/76—Removable non-load-bearing partitions; Partitions with a free upper edge with framework or posts of metal
- E04B2/761—L-connections
-
- 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
- E06B3/00—Window sashes, door leaves, or like elements for closing wall or like openings; Layout of fixed or moving closures, e.g. windows in wall or like openings; Features of rigidly-mounted outer frames relating to the mounting of wing frames
- E06B3/96—Corner joints or edge joints for windows, doors, or the like frames or wings
- E06B3/964—Corner joints or edge joints for windows, doors, or the like frames or wings using separate connection pieces, e.g. T-connection pieces
- E06B3/9645—Mitre joints
- E06B3/9646—Mitre joints using two similar connecting pieces each connected with one or the frame members and drawn together at the joint
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/38—Connections for building structures in general
- E04B1/58—Connections for building structures in general of bar-shaped building elements
- E04B1/5825—Connections for building structures in general of bar-shaped building elements with a closed cross-section
- E04B2001/5856—Connections for building structures in general of bar-shaped building elements with a closed cross-section using the innerside thereof
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Connection Of Plates (AREA)
- Clamps And Clips (AREA)
Abstract
PLASTIC CLAMP FOR CONNECTING A
PAIR OF METAL SECTIONS
ABSTRACT OF THE DISCLOSURE
Disclosed is a clamp for connecting a pair of frame metal sections arranged at right angles to each other. The clamp comprises a pair of identical pieces of plastic material each comprising a resilient pawl for the engagement into a hole provided in the metal section and having on the surface joining the other piece, a pair of holes. One hole is adapted to be tapped by a self-tapping screw which clamps together the pair of piece and the other hole is a through hole for the clamping screw.
PAIR OF METAL SECTIONS
ABSTRACT OF THE DISCLOSURE
Disclosed is a clamp for connecting a pair of frame metal sections arranged at right angles to each other. The clamp comprises a pair of identical pieces of plastic material each comprising a resilient pawl for the engagement into a hole provided in the metal section and having on the surface joining the other piece, a pair of holes. One hole is adapted to be tapped by a self-tapping screw which clamps together the pair of piece and the other hole is a through hole for the clamping screw.
Description
104~
PLASTIC CLAMP FOR CONNECTING A PAIR OF FRAME METAL SECTIONS
. .
This invention relates to a connecting system between a pair of frame metal sections arranged at right angles to each other.
At present, such connections are performed by means of a clamp formed of two metal portions, one being a male portion and the other a female portion, which compenetrate and are connected to each other by a bolt provided on one portion and a nut provided on the other portion. Between those two portions a spring is interposed which serves to accommodate the working tolerances of the two portions.
This solution is expensive and requires also the use of different clamps for different sizes of the metal sections.
The object of this invention is to obviate these drawbacks. -More particularly, this invention contemplates a clamp for connecting a pair of frame metal sections arranged at right angles to each other and is characterized in that the clamp comprises a pair of identical pieces of plastic material each comprising a resilient pawl for engagement into a hole provided in the respective metal section and having on the surface adapted to join the other piece, a pair of holes, one hole being adapted to be tapped by a self-tapping screw for clamping together the pair of pieces and the other hole being a through -~
hole adapted to accommodate such a screw.
Since the clamp is made of plastic material, it is less expensive than the known metal clamps. Further, since the two . .
1~,P4 .. , , , "- , . . .
- ~ ~04ql~3~ :
clamp pieces are identical they are obtained through the use of a single mold. Finally, since the resilient pawl engages the metal section, a single clamp serves for metal sections of different sizes. The pawl accommodates the clearances inside the metal sections according to the tension force exerted by the clamping screw.
.
The invention will be better understood from the following description, given merely by way of example and therefore not intended in a limiting sense, of an embodiment thereof in connection with the accompanying drawing, wherein:
Fig. 1 is a fragmentary sectional view, in side elevation, of a clamp according to this invention, applied to a metal section; and Fig. 2 is a front elevation view of one of the two pieces forming the clamp of Fig. 1.
. ~ .
It results from these Figs. that the clamp comprises two identical plastic pieces 1 and 2, adapted to be joined to each other inside two metal sections 3 and 4 of a frame, arranged at ` rights angles to each other. Since the two pieces are identical, only one thereof will be described in detail.
The piece has substantially the shape of a tray ~
with two perimetral sides 5, 6 which are shorter than -the opposite perimetral sides 7 and 8, respectively ~' so as to form at a corner an undercut 9. In the bottom wall 10 a rectangular opening 11 is provided which has two enlarged -portions 12, -13 defined by two lugs 14 and 15, respectively perpendicùlar to the bottom wall 10. These lugs carry ~ - 2 -109~443;~
by means of pins 16, 17 a pawl 18 which is faceted at 19 and 20 on one side and has on the opposite side a rounded surface 21. For a length of the extent of the opening 11 it is defined by a perimetral wall 22. An inclined sur-face 23 joins the edge of the bottom wall lO. Projecting from the latter is a transversal stiffening rib 24, which joins to two opposite perimetral walls 25, 26 of the tray The side 6 of the tray defines a wall 27, inclined by 45 to the bottom wall of the tray to which it is connected.
From a face of this wall 27 two cylindrical bosses pro-ject, which are symmetrically positioned with respect to the longitudinal axis of the tray. The boss 28 is pro-vided with a bore 30 intended to be tapped by a self-tapping screw 31, whereas the boss 29 is provided with a through bore 32 for the self-tapping screw. Projecting from the inclined wall 27 is a rib 33.
When two metal sections like those designated with 3 and 4 in Fig. 1 are to be connected by means of a clamp formed of two pieces like that herein described, the two clamp .~
pieces are first inserted into the respective metal sec-tions. Since the two pieces 1 and 2 are identical, only `
piece 1 is taken into account. This piece is inserted into the metal section 3 at one end thereof which is cut - -at 45 to the metal section axis and the piece 1 is slid within the metal section until the pawl 18 is in register with the hole 34 in the metal section. Once the pawl 18 is in register with said hole 34, it snaps therein ~
with the rounded surface 21 thereof engaging the edge "-~ -of the hole 34 and the flat surface 20 .
3 : .
,~ :
',,, ,,, :
", , , , , , ,, . ,: , . , , . , - , . :, . .. . . ..
104~ z thereof engaging the metal section 3. This occurs because the pawl 18, in order to be able to slide within the metal section until the hole 34 is reached, has been obliged to take a position in which the elastic pins 16 and 17 con- -necting the pawl to the piece have been subjected to tor-sional stress and therefore when the pawl is in register with the hole the pins release this torsional stress causing the pawl to snap into the hole and to be locked in the metal section. Because of the engagement of the pawl between the hole edge on the one hand and the inside of the metal section on the other hand, the pawl remains in a locked position even in the case that its pins would be broken away. In this manner the locking of the piece 1 in the metal section is always assured.
Assuming that the piece 2 has been locked in the same ., .
manner in the metal section 4, the two metal sections 3 -~ and 4, in order to be joined to eàch other, are b;rought r;
~ in contact at the innermost edge, the self-tapping screw :........................................................................ - .
~ 31 is inserted into the bore 32 of the boss 29 through s ~ .
the bore 35 provided in the metal section 3 and is tight-s ~ ened so that the sCreW31 cuts threads in the wall of ~- bore 30 of the boss 28 and brings in contact also the outer edge of the two metal sections. In doing so, the rib 33 of piece 1 enter the undercUt 9 of piece 2 and > .
'4~i conversely, so that the two pieces ~ompenetrate thereby making the connection more firm.
Because of the manner in which the pawl 18 en-gages the metal section it is apparent that this engage-ment will be possible ,i, , - ., ~ _ 4~ -., , ~)444~'~
independently of the section sizes, of course within the size variations of the commercially available metal sec-tions used for this purpose. Indeed, on the one hand the pawl engages the hole 34 in the metal section and this engagement occurs independently of the width of the section. On the other hand the pawl engages an inner wall of the section a~ this engagement is indep-endent of the thickness of the section because the pawl swings more or less about its pins until it is in con-tact with the section wall. -While only one embodiment of he invention has been shown and described, it is obvious that various changes and modifications can be made thereto without departing from the scope of the invention.
., ~ .
,` '' '' .~ .
~' ' ~''-~. .
~ - 5 -
PLASTIC CLAMP FOR CONNECTING A PAIR OF FRAME METAL SECTIONS
. .
This invention relates to a connecting system between a pair of frame metal sections arranged at right angles to each other.
At present, such connections are performed by means of a clamp formed of two metal portions, one being a male portion and the other a female portion, which compenetrate and are connected to each other by a bolt provided on one portion and a nut provided on the other portion. Between those two portions a spring is interposed which serves to accommodate the working tolerances of the two portions.
This solution is expensive and requires also the use of different clamps for different sizes of the metal sections.
The object of this invention is to obviate these drawbacks. -More particularly, this invention contemplates a clamp for connecting a pair of frame metal sections arranged at right angles to each other and is characterized in that the clamp comprises a pair of identical pieces of plastic material each comprising a resilient pawl for engagement into a hole provided in the respective metal section and having on the surface adapted to join the other piece, a pair of holes, one hole being adapted to be tapped by a self-tapping screw for clamping together the pair of pieces and the other hole being a through -~
hole adapted to accommodate such a screw.
Since the clamp is made of plastic material, it is less expensive than the known metal clamps. Further, since the two . .
1~,P4 .. , , , "- , . . .
- ~ ~04ql~3~ :
clamp pieces are identical they are obtained through the use of a single mold. Finally, since the resilient pawl engages the metal section, a single clamp serves for metal sections of different sizes. The pawl accommodates the clearances inside the metal sections according to the tension force exerted by the clamping screw.
.
The invention will be better understood from the following description, given merely by way of example and therefore not intended in a limiting sense, of an embodiment thereof in connection with the accompanying drawing, wherein:
Fig. 1 is a fragmentary sectional view, in side elevation, of a clamp according to this invention, applied to a metal section; and Fig. 2 is a front elevation view of one of the two pieces forming the clamp of Fig. 1.
. ~ .
It results from these Figs. that the clamp comprises two identical plastic pieces 1 and 2, adapted to be joined to each other inside two metal sections 3 and 4 of a frame, arranged at ` rights angles to each other. Since the two pieces are identical, only one thereof will be described in detail.
The piece has substantially the shape of a tray ~
with two perimetral sides 5, 6 which are shorter than -the opposite perimetral sides 7 and 8, respectively ~' so as to form at a corner an undercut 9. In the bottom wall 10 a rectangular opening 11 is provided which has two enlarged -portions 12, -13 defined by two lugs 14 and 15, respectively perpendicùlar to the bottom wall 10. These lugs carry ~ - 2 -109~443;~
by means of pins 16, 17 a pawl 18 which is faceted at 19 and 20 on one side and has on the opposite side a rounded surface 21. For a length of the extent of the opening 11 it is defined by a perimetral wall 22. An inclined sur-face 23 joins the edge of the bottom wall lO. Projecting from the latter is a transversal stiffening rib 24, which joins to two opposite perimetral walls 25, 26 of the tray The side 6 of the tray defines a wall 27, inclined by 45 to the bottom wall of the tray to which it is connected.
From a face of this wall 27 two cylindrical bosses pro-ject, which are symmetrically positioned with respect to the longitudinal axis of the tray. The boss 28 is pro-vided with a bore 30 intended to be tapped by a self-tapping screw 31, whereas the boss 29 is provided with a through bore 32 for the self-tapping screw. Projecting from the inclined wall 27 is a rib 33.
When two metal sections like those designated with 3 and 4 in Fig. 1 are to be connected by means of a clamp formed of two pieces like that herein described, the two clamp .~
pieces are first inserted into the respective metal sec-tions. Since the two pieces 1 and 2 are identical, only `
piece 1 is taken into account. This piece is inserted into the metal section 3 at one end thereof which is cut - -at 45 to the metal section axis and the piece 1 is slid within the metal section until the pawl 18 is in register with the hole 34 in the metal section. Once the pawl 18 is in register with said hole 34, it snaps therein ~
with the rounded surface 21 thereof engaging the edge "-~ -of the hole 34 and the flat surface 20 .
3 : .
,~ :
',,, ,,, :
", , , , , , ,, . ,: , . , , . , - , . :, . .. . . ..
104~ z thereof engaging the metal section 3. This occurs because the pawl 18, in order to be able to slide within the metal section until the hole 34 is reached, has been obliged to take a position in which the elastic pins 16 and 17 con- -necting the pawl to the piece have been subjected to tor-sional stress and therefore when the pawl is in register with the hole the pins release this torsional stress causing the pawl to snap into the hole and to be locked in the metal section. Because of the engagement of the pawl between the hole edge on the one hand and the inside of the metal section on the other hand, the pawl remains in a locked position even in the case that its pins would be broken away. In this manner the locking of the piece 1 in the metal section is always assured.
Assuming that the piece 2 has been locked in the same ., .
manner in the metal section 4, the two metal sections 3 -~ and 4, in order to be joined to eàch other, are b;rought r;
~ in contact at the innermost edge, the self-tapping screw :........................................................................ - .
~ 31 is inserted into the bore 32 of the boss 29 through s ~ .
the bore 35 provided in the metal section 3 and is tight-s ~ ened so that the sCreW31 cuts threads in the wall of ~- bore 30 of the boss 28 and brings in contact also the outer edge of the two metal sections. In doing so, the rib 33 of piece 1 enter the undercUt 9 of piece 2 and > .
'4~i conversely, so that the two pieces ~ompenetrate thereby making the connection more firm.
Because of the manner in which the pawl 18 en-gages the metal section it is apparent that this engage-ment will be possible ,i, , - ., ~ _ 4~ -., , ~)444~'~
independently of the section sizes, of course within the size variations of the commercially available metal sec-tions used for this purpose. Indeed, on the one hand the pawl engages the hole 34 in the metal section and this engagement occurs independently of the width of the section. On the other hand the pawl engages an inner wall of the section a~ this engagement is indep-endent of the thickness of the section because the pawl swings more or less about its pins until it is in con-tact with the section wall. -While only one embodiment of he invention has been shown and described, it is obvious that various changes and modifications can be made thereto without departing from the scope of the invention.
., ~ .
,` '' '' .~ .
~' ' ~''-~. .
~ - 5 -
Claims (6)
1. A clamp for connecting a pair of frame metal sections arranged at right angles to each other, characterized in that the clamp comprises a pair of identical pieces of plastic material each comprising a resilient pawl for engagement into a hole provided in the respective metal section and having on the surface adapted to join the other piece a pair of holes, one hole being adapted to be tapped by a self-tapping screw for clamping together said pair of pieces and the other hole being a through hole adapted to accommodate such a screw.
2. A clamp according to claim 1, characterized in that said pair of pieces are cup-shaped and are provided with an opening at the bottom from which the pawl extends.
3. A clamp according to claim 2, characterized in that from the cup bottom a pair of ears inwardly project which integrally support a pair of resilient pins fastened to said pawl.
4. A clamp according to claims 1 - 3, characterized in that said pawl has a faceted surface, a face of which is adapted to engage the inner wall of said metal section.
5. A clamp according to claims 1 - 3, characterized in that said pair of holes at the joining surface are arranged symmetrically to the longitudinal axis of said piece.
6. A clamp according to claims 1 - 3, characterized in that each piece has a periphery substantially rectangular in shape with a recess at one of the rectangle corners and a rib extending from the surface joining the other piece, adapted to engage in the recess of the other piece.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| IT7620275A IT1055323B (en) | 1976-02-18 | 1976-02-18 | PLASTIC BRACKET FOR THE JOINT BETWEEN TWO RIGHT ANGLE PROFILES BETWEEN THEM |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1044432A true CA1044432A (en) | 1978-12-19 |
Family
ID=11165348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA270,193A Expired CA1044432A (en) | 1976-02-18 | 1977-01-21 | Plastic clamp for connecting a pair of frame metal sections |
Country Status (8)
| Country | Link |
|---|---|
| JP (1) | JPS52100052A (en) |
| CA (1) | CA1044432A (en) |
| DE (1) | DE2704199A1 (en) |
| ES (1) | ES455709A1 (en) |
| FR (1) | FR2341771A1 (en) |
| GB (1) | GB1544732A (en) |
| IT (1) | IT1055323B (en) |
| SE (1) | SE7701691L (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2750307C2 (en) * | 1977-11-10 | 1986-08-21 | SCHÜCO Heinz Schürmann GmbH & Co, 4800 Bielefeld | Corner or T connection of two profiles |
| DE202011107301U1 (en) * | 2011-10-28 | 2012-03-22 | Versee Gmbh | pipe connectors |
-
1976
- 1976-02-18 IT IT7620275A patent/IT1055323B/en active
-
1977
- 1977-01-21 CA CA270,193A patent/CA1044432A/en not_active Expired
- 1977-02-02 DE DE19772704199 patent/DE2704199A1/en not_active Withdrawn
- 1977-02-07 ES ES455709A patent/ES455709A1/en not_active Expired
- 1977-02-16 SE SE7701691A patent/SE7701691L/en unknown
- 1977-02-16 GB GB6384/77A patent/GB1544732A/en not_active Expired
- 1977-02-17 FR FR7704561A patent/FR2341771A1/en active Granted
- 1977-02-18 JP JP1631877A patent/JPS52100052A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| FR2341771B3 (en) | 1981-01-09 |
| SE7701691L (en) | 1977-08-19 |
| DE2704199A1 (en) | 1977-09-01 |
| IT1055323B (en) | 1981-12-21 |
| JPS52100052A (en) | 1977-08-22 |
| FR2341771A1 (en) | 1977-09-16 |
| ES455709A1 (en) | 1978-01-16 |
| GB1544732A (en) | 1979-04-25 |
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