An integrated joint assembly fastener is described for removably securing two adjoining members together along flat mating surfaces. A housing is provided with an off-center circular bore in which a rotatable element is held captive. The bottom end of the rotatable element has an offset connecting p
An integrated joint assembly fastener is described for removably securing two adjoining members together along flat mating surfaces. A housing is provided with an off-center circular bore in which a rotatable element is held captive. The bottom end of the rotatable element has an offset connecting post which extends perpendicular to a slit provided in a rear sidewall of the housing. Stationary wedges on the housing front project from opposite side of the slit. A pair of connecting dowel head sections project from the front opening and are engaged by the offset connecting post of the rotatable element. The dowel head sections have a gripping ridge section at a free end and an inclined abutment formation for sliding engagement against the wedges. By rotating the rotatable element, the gripping ridge sections of the dowel head are pulled back and wedged outwardly, laterally. Displacement inwardly towards the housing front causes each gripping head section to engage within the materials in bore of the adjoining member and to pull back and tighten the members together.
대표청구항▼
1. An integrated joint assembly fastener (10) for releasably securing two adjoining parts (11-12) together along flat mating surfaces (11′-12′) thereof, said fastener assembly comprising a housing (13) having an axially off-center bore (15) of circular cross-section extending from a top wall (30) of
1. An integrated joint assembly fastener (10) for releasably securing two adjoining parts (11-12) together along flat mating surfaces (11′-12′) thereof, said fastener assembly comprising a housing (13) having an axially off-center bore (15) of circular cross-section extending from a top wall (30) of said housing, an opening (23) offset from a side wall (22) of said housing leading to said bore, a rotatable element (16) having a circular sidewall (41) for close rotational fit in said bore (15), means (45) to maintain said rotatable element in said bore, an offset connecting post (42) projecting from a lower end (43) of said rotatable element and disposed adjacent said opening (23) when said rotatable element is in said bore, stationary wedge means (27-27′) projecting from said sidewall (22) at a predetermined location adjacent said opening, characterized in that a pair of connecting dowel head sections (50) project from said opening and have an engageable end (52) for attachment about said offset connecting post (42), said dowel head sections (50) having a gripping head section (51) at a free end thereof and an inclined abutment formation (62) for sliding engagement against said wedge means (27-27′) when said dowel head sections are axially displaced by said offset connecting post (42) when said rotatable element (16) is rotated in a predetermined direction (34) to retract said dowel head sections (50) to cause their inclined abutment formation to be displaced against said wedge means and urging said respective gripping head sections (51) outwardly to an engaging position; said rotatable element (16) when rotated in an opposite direction when said gripping head sections are engaged, forcing said gripping head sections to move inwardly to a disengaged position, thereby disconnecting two adjoining parts (11-12), said engageable end (52) of said connecting dowel head sections (50) being constituted by a flat ring formation (53) formed in said flat connecting body portion, said ring having a through bore (54) for loosely receiving said offset connecting post (42) therethrough said gripping head section (51) of each said pair of connecting dowel head sections (50) being disposed on a respective side of a central longitudinal axis (68) passing through said wedge means (27-27′) whereby said flat ring formation (53) of each dowel head section of said pair can be disposed in facial contact on a contact face (53′) about said offset connecting post (42).2. A fastener assembly as claimed in claim 1 further characterized in that said opening (23) in a sidewall (22) of said housing (13) is a transverse slot (23) disposed transverse to a central longitudinal axis (25) of said bore.3. A fastener assembly as claimed in claim 2 further characterized in that said stationary wedge means (27-27′) is constituted by a pair of like wedge arms (27-27′) extending from a flat outer wall section (26) of said housing, each wedge arm being disposed on a respective one of opposed sides of said transverse slot (23) and project aligned parallel to one another in a common plane (28), passing through said central longitudinal axis each wedge arm (27-27′) having a wedge shaped free end (29), said wedge arms having a predetermined length.4. A fastener assembly as claimed in claim 3 further characterized in that said gripping head section (51) of said dowel head sections (50) is of substantially semi-circular cross-section defining an arcuate outer wall (56) and a flat inner wall (57), said head section having gripping ribs (58) in said arcuate outer wall, said gripping ribs having a rearwardly sloped front wall (59) and a flat rear wall (60) to define a sharp pointed outer gripping edge (61), said inclined abutment formation (62) being constituted by a sloped inner wall portion disposed in a bore of said head and extending to said flat inner wall of said head section and adapted to lie on a sloped wall (29′) of at least one of said wedge shaped free end (29) of said wedge arms (27-27′).5. A fastener assembly as claimed in claim 4 further characterized in that said wedge shaped free end (29) has opposed sloped walls (29′), said gripping head section (51) having a pair of said sloped inner wall portions (62) disposed on each side of a flat connecting body (55) of said connecting dowel head sections (50), each said sloped inner wall portions (62) being disposed against a common one of said opposed sloped walls (29′) of a respective one of said wedge arms (27-27′).6. A fastener assembly as claimed in claim 3 in combination with said two adjoining parts (11-12) and further characterized in that said parts are flat rectangular wood pieces, one of said wood pieces (11) having one or more of said locating bores (14) therein, the other of said adjoining wood piece (12) having one or more dowel head holes (19) therein disposed in a sidewall (12′) thereof adjacent a straight edge and aligned to receive respectively said wedge arms (27-27′) and dowel head section (50) when disposed at right angles against said flat side edge (12′) of said one of said wood pieces, said rotatable element (16) when rotated to cause said head sections (51) to move outwardly forcing said gripping ribs (58) of said heads to engage into a sidewall (19′) of said dowel head hole (19) and drawing said wood pieces together along said flat mating surfaces.7. A fastener assembly as claimed in claim 6 further characterized in that said wood pieces (11-12) are pre-machined wood furniture components.8. A fastener assembly as claimed in claim 1 further characterized in that said flat connecting bodies (55) extend through said transverse slot (23) between said pair of like wedge arms with said gripping head sections (51) on a respective side of said wedge arms(27-27′).9. A fastener assembly as claimed in claim 8 further characterized in that one of said flat connecting bodies (55) are each provided with an abutment flange (65) projecting outwardly from said contact face (53′) at a predetermined position to arrest an edge of the other flat connecting body when said pair of flat connecting bodies are disposed in said facial contact whereby to restrict the angular outer displacement of said gripping head sections (51) by rotation of said rotatable element (16) and further restricting displacement of said connecting post (42) away from said transverse slot (23).10. A fastener assembly as claimed in claim 9 further characterized in that said rotatable element (16) is provided with a tool engaging formation (17) in an outer end face (30) thereof to impart rotation to said rotatable element.11. A fastener assembly as claimed in claim 10 further characterized in that said tool engaging formation (17) is a screw driver or key engaging formation, said formation (17) having a predetermined depth for engagement by a screw driver bit (18) or key end disposed at an angle thereto or vertical therein.12. A fastener assembly as claimed in claim 10 further characterized in that rotation of said rotatable element (16) to dispose said connecting post (42) adjacent said transverse slot (23), and substantially in said common plane (28) of said pair of wedge arms (27-27′), positions said gripping head sections (51) to their outermost non-engaging position with said sloped inner wall portions (62) of said gripping head sections (51) lying forwardly of said wedge shaped free end (29) of said wedge arms (27-27′); said rotatable element 16 when rotated away from said common plane (28) causing displacement of said connecting post (42) along an offset arc to said central rotational axis (25) of said rotatable element (16) and away from said transverse slot (23) thereby pulling said head sections (51) and causing them to move outwardly of one another to an engaging position due to the sliding engagement of said sloped inner wall portions (62) against respective sloped walls (29′) of said wedge shaped free end (29) of said pair of wedge arms (27-27′).13. A fastener assembly as claimed in claim 12 further characterized in that said top wall (30) of said housing (13) has a flat transverse flange (32) disposed about said bore (15), said transverse flange having a straight edge (33) coextending with said flat outer wall section (26) of said housing, and indication means (34) in an outer surface of said flange (32) to indicate the direction of rotation of said rotatable element (16) to place said gripping head sections (51) at said engaging or disengaging positions.14. A fastener assembly as claimed in claim 13 further characterized in that said outer end face of said rotatable element (16) is further provided with a position indicator mark (37), said indicating means having a head engaging position symbol (35) and a head disengaging position symbol (36), said position indicator mark (37) being disposed adjacent said head disengaging position symbol and displaceable by rotation of said rotatable element to said head engaging position indicator mark to place said gripping head sections (51) in an engaging position and vice versa to disengage said gripping head sections, said head engaging and disengaging symbols (35-36) being disposed on a diametrical axis of said bore (15) and extending substantially parallel to the plane of said flat outer wall section (26) of said housing (13).15. A fastener assembly as claimed in claim 14 further characterized in that said rotational element (16) circular sidewall (44) is provided with 3 (three) wedging flat sidewall sections (48), said flat sidewall sections (48) being provided at intervals of 90 degrees about said sidewall from said position indicator mark (37).16. A fastener assembly as claimed in claim 12 further characterized in that said housing (13) is further provided with projecting axial ribs (38) to prevent rotation and increase mating surface pressure points of said housing (13) when force fitted in a locating bore (14) formed in a surface of one of said adjoining parts (11) adjacent a flat side edge (11′) thereof, said locating bore (14) extending partly into said flat side edge (11′) whereby said flat outer wall section (26) of said housing (13) will lie flush with said flat side edge(11′) with said wedge arms (27-27′) and dowel head sections (50) projecting therefrom.17. A fastener assembly as claimed in claim 16 further characterized in that a lower outer circumferential wall section of said housing is provided with one or more circumferential wedge formations (40) to resist against an outward and upward pulling force exerted on said housing (13) when engaged in said locating bore (14).18. A fastener assembly as claimed in claim 16 further characterized in that a plurality of gripping ribs (39) extend along said axial ribs (38), therebeing two of said axial ribs (38) disposed on opposed sides of said sidewall (22) on an axis transverse to said wedge arms, said gripping ribs (39) resisting against an outward and upward pulling force exerted on said housing.19. A fastener assembly as claimed in claim 1 further characterized in that said fastener assembly (10) is constructed of die-cast metal parts.20. A fastener assembly as claimed in claim 1 further characterized in that said rotatable element (16) circular sidewall (41) having a circumferential channel (44), said rotatable element (16) when disposed in said housing (13) being retained therein at a predetermined position by a rib (45) punched into said sidewall (46-47) and extending into said circumferential channel (44), said rib (45) constituting said means to maintain said rotatable element in said bore.
※ AI-Helper는 부적절한 답변을 할 수 있습니다.