GB2179419A - Joining planar members at right angles - Google Patents
Joining planar members at right angles Download PDFInfo
- Publication number
- GB2179419A GB2179419A GB08521214A GB8521214A GB2179419A GB 2179419 A GB2179419 A GB 2179419A GB 08521214 A GB08521214 A GB 08521214A GB 8521214 A GB8521214 A GB 8521214A GB 2179419 A GB2179419 A GB 2179419A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tongue portion
- projecting tongue
- legs
- constriction
- planar
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 claims description 12
- 238000007493 shaping process Methods 0.000 claims description 2
- 239000000463 material Substances 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000010276 construction Methods 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- -1 polypropylene Polymers 0.000 description 2
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 229920006324 polyoxymethylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
- F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
- F16B12/12—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
- F16B12/26—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using snap-action elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
- F16B12/00—Jointing of furniture or the like, e.g. hidden from exterior
- F16B12/10—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like
- F16B12/12—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics
- F16B12/14—Jointing of furniture or the like, e.g. hidden from exterior using pegs, bolts, tenons, clamps, clips, or the like for non-metal furniture parts, e.g. made of wood, of plastics using threaded bolts or screws
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47B—TABLES; DESKS; OFFICE FURNITURE; CABINETS; DRAWERS; GENERAL DETAILS OF FURNITURE
- A47B2230/00—Furniture jointing; Furniture with such jointing
- A47B2230/02—Assembly systems with separate fixing devices on each corner wall and a common corner joining element
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Furniture Connections (AREA)
Abstract
A bridge member 1 is secured to a surface of a planar member 25 so as to form a channel having a restriction therein. The base member 17 of a locator member 16 is secured to a surface of a second planar member 26 and the planar member 25 and 26 are brought together at right angles, a projecting tongue portion 18 of the locator member 16 being inserted into the channel until protuberances on the projecting tongue portion 18 have been forced beyond the constriction in the channel. The joint is made secure by passing a screw through the span of the bridge member 1 and the projecting tongue portion 18 of the locator member 16 into the planar member 25. <IMAGE>
Description
SPECIFICATION
Method of joining two planar members at right angles to one another and corner joint for use therein
This invention relates to a method of joining two planar members at right angles to one another, and to a corner joint for use in such method.
A number of different corner joints are currently available for joining together two planar members, for example two boards or panels, at right angles to one another, and such corner joints, which are to be sold in the do-ityourself market, are designed to be as simple as possible in operation. One simple and much used corner joint consists of two blocks of plastics material a first one of which is secured by two screws to one planar member or board. The second block of plastics material is then secured by two screws to the second planar member or board in the appropriate position. The two blocks are finally secured to each other using a central threaded bolt passing through the first block and engaging in a nut in a recess in the second block. Location of the joint is also maintained by two pegs from the first block penetrating into two recesses in the second block.The whole forms a means of joining the two planar members at right angles and is useful for making concealed joints particularly for furniture which may be easily assembled or dismantled.
The final screwing operation of securing the two blocks together using the threaded nut and bolt is an awkward one, because the action of screwing the threaded nut must be performed very close to the surface of the first planar member.
It is an object of the present invention to provide an improved method and means for joining two planar members together at right angles using a corner joint which has all the advantages of the known corner joint, and additionally provides greater ease of assembly than the known corner joint, while being less costly than the known corner joint.
According to the present invention there is provided a method of joining together two planar members at right angles to one another, in which a bridge member, which comprises two legs and a central span joining the two legs, is secured to a surface of a first planar member near an edge thereof such that a tunnel is formed by the central span and the legs of the bridge member and the said surface of the first planar member, said tunnel being shaped to have a constriction therein, a locator member, which comprises a base member having a projecting tongue portion extending therefrom with a protuberance on the projecting tongue portion at a position remote from the base member, is secured to a surface of a second planar member, the projecting tongue portion is inserted into the tunnel as the first and second planar members are brought together at right angles until the protuberance on the projecting tongue portion has been moved beyond the constriction in the tunnel portion and the first and second planar members are thereby held in the desired juxtaposition at right angles to one another while the joint between the two planar members is made secure by passing a fixing member through the span of the bridge member and the projecting tongue portion of the locator member.
Preferably the strength of the joint is increased by causing the fixing member, which is advantageously a screw, to penetrate into the second pianar member.
The constriction in the said tunnel is advantageously formed by shaping the sides of the tunnel which are the inner vertical surfaces of the two legs of the bridge member. These inner vertical surfaces conveniently slope inwards towards one another along the length of the tunnel until the constriction is reached, and these inner vertical surfaces are then relieved and slope away from one another, the relieved surfaces being at an angle of 90" with one another.
The present invention also comprehends a corner joint for joining together two planar members at right angles to one another, the joint comprising: a bridge member having a body including legs and a central span joining the two legs and defining therewith a channel the sides of which are inclined towards a constriction at a narrowest part of the channel and then relieved beyond the constriction, a central screw hole being provided through the central span of the bridge member from the upper surface of the bridge member to the channel, and screw holes parallel to the central screw hole being provided through each leg of the bridge member; a locator member comprising a base member having a tongue portion projecting from a central part of the base member, said projecting tongue portion tapering in a direction away from the base member and having protuberances provided by wider sides at the end of the taper, the base member having screw holes therethrough at either side of the projecting tongue portion, which screw holes extend in directions parallel to the direction in which the proj ecting tongue portion extends from the base member, and the projecting tongue portion having a screw hole therethrough in a direction perpendicular to said direction; and a screw extending through said screw hole in the bridge member and into the screw hole in the projecting tongue portion of the locator member when the tongue portion is located in the channel by the protuberances engaging the constriction in the channel.
The invention will be further understood from the following detailed description of a preferred embodiment thereof which is made, by way of example, with reference to the accompanying drawings, in which:
Figure 1 is an underneath plan of a bridge member which is a first part of a corner joint according to the invention,
Figure 2 is a cross-sectional view of the bridge member of Figure 1 taken along the line X-X of that figure,
Figures 3 and 4 are respectively a plan view and a front view of a locator member which is a second part of a corner joint according to the invention,
Figures 5 and 6 are respectively front and side views of a corner joint including the bridge member of Figures 1 and 2 and the locator member of Figures 3 and 4 in use in securing two boards at right angles to one another, and
Figures 7 and 8 are cross-sectional views of the construction of Figures 5 and 6 taken along the line A-A of Figure 5 and line B-B of
Figure 6 respectively.
In the drawings the same or similar parts are designated by like reference numerals.
Referring to Figures 1 and 2 there is shown a bridge member 1 which has two legs 2 and 3 and a central span 4 joining the two legs 2 and 3 together. The central span 4 of the bridge member 1 defines, with the legs 2 and 3, a channel 5 which may readily be seen in the cross-sectional view of Figure 2. As may be more particularly seen in the underneath plan view of Figure 1, the legs 2 and 3 have vertical inner side walls 6 and 7 which slope towards one another along the length of the channel to define a narrowest point or constriction in the channel between the legs 2 and 3, after which the side walls are relieved so that they slope away from one another.
The relieved portions 6a and 7a of the inner side walls are each at an angle of 45" to a central axial line through the channel between the legs 2 and 3, and therefore these relieved surfaces 6a and 7a are at right angles to one another.
A screw hole 8 is provided through the central span 4 of the bridge member 1 from the surface 9 (Figure 2) of the bridge member 1 which in use will be the upper surface of the bridge member over the channel 5. Respective screw holes 10 and 11 are provided in the legs 2 and 3, these screw holes 10 and 11 being parallel to the screw hole 8.
Both the bridge member 1 and a cooperating locator member 16, described below, are moulded from a suitable plastics material which provides both rigidity and resilience.
The plastics material may be an acetal polymer, a polypropylene, a polyethylene or a polyamide. The bridge member 1 may optionally have cooling apertures 13 and 14, as shown in Figure 1, for assisting in cooling of the moulded member.
In Figures 3 and 4 there are shown respectively plan and front views of the locator member 16 which comprises a base member 17 having a tongue portion 18 projecting from a central part of the base member 17. It will be seen, from Figure 4, that the tongue portion 18 projects from the lower central part of the base member 16 and, from both Figures 3 and 4, that the tongue portion 18 tapers in a direction away from the base member. However, at its end remote from the base member 17 the tapering of the tongue portion 18 is reversed by protuberances 19, 19 formed on the sides of the tongue portion 18. The resulting increase in width at the end of the tongue portion 18 effectively provides a latch for engagement with the constriction in the channel 5 of the bridge member 1, as will be described.
The base member 17 of the locator member 16 has screw holes 21, 22 therethrough at either side of the projecting tongue portion 18, the screw holes 21, 22 extending in directions parallel to the direction in which the projecting tongue portion 18 extends from the base member 17. A screw hole 23 is also provided in the projecting tongue portion 18, this screw hole 23 extending in a direction at right angles to the directions of the screw holes 21 and 22.
The manner in which a corner joint including the bridge member 1 and the locator member 16 is used to join together two boards or other planar members at right angles to one another will now be described. The finished corner joint securing two boards together at right angles is illustrated in Figures 5 to 8 to which reference should be made in conjunction with the following description, and the drawings of Figures 1 to 4 described above.
In use the bridge member 1 is secured to a first board or other planar member 25 by screws 24, 24 screwed into the board 25 through the screw holes 10 and 11 from the surface 9 of the bridge member 1. The legs 2 and 3 and central span 4 of the bridge member 1 then define, with the surface of the board member 25, a tunnel constituted by the channel 5 in the bridge member 1.
The locator member 16 is secured to a second board or other planar member 26 by screws 27 in the screw holes 21, 22 in the base member 17 of the locator member 16.
In each case the securing of the bridge member 1 and the locator member 16 to the respective board 25 or 26 is done entirely independently of the other member and the other board. The bridge member 1 and the locator member 16 are each secured to their respective board a suitable distance from the edge of the board. Most advantageously the dimensions of the bridge member 1 and the locator member 16 are such that the screws 24, 24 and 27, 27 are inserted the same distance, for example 20 mm, from the edges of the respective boards.
The boards 25 and 26 with the bridge member 1 and the locator member 16 respectively secured to them are then brought together at right angles so that the projecting tongue portion 18 of the locator member 16 is inserted into the tunnel defined by the channel 5 of the bridge member 1 and the surface of the board 25. The tongue portion 18 extends into the tunnel without hindrance until the protuberances 19, 19 on the tongue portion 18 are restrained from easy movement by the constriction in the channel 5. In this position the boards are presented to each other at an angle of 90" and may be held without danger of the boards slipping apart. A sharp blow, for example with the flat of the hand, on board 26 forces the protuberances 19, 19 beyond the constriction in the channel 5, this movement being accompanied by a loud "click".The projecting tongue portion 18 has now reached the position shown in dashed lines in Figure 5 and in full lines in the cross-sectional view which is Figure 8, in which the protuberances 19, 19 on the tongue portion 18 engage with the inner side walls of the legs 2 and 3 at the constriction in the channel 5 so that the tongue portion 18 is effectively latched or locked in the bridge member 1. The boards 25 and 26 are now held firmly together with a strong "pressstud" action and the sides of the legs and the tongue portion in contact.
In this latched position, the hole 23 in the projecting tongue portion 18 is aligned with the screw hole 8 in the central span 4 of the bridge member 1. The corner joint between the boards 25 and 26 is now made finally secure by inserting a screw through the aligned holes 8 and 23 and screwing this screw into the body of the board 25.
As an alternative to the use of a screw the final securing of the corner joint may be achieved by hammering a nail through the aligned holes 8 and 23 and into the body of the board 25, but the greater strength provided by a screw is preferred.
The corner joint as hereinbefore described with reference to the accompanying drawings has the advantage over all previously used corner joints in that it provides the additional strength consequent upon the final securing member which passes through the aligned holes 8 and 23 and enters one of the two boards.
Also this additional strength is achieved, in the preferred embodiment in which a screw secures the two blocks together and to the board 25, with the use of five similar screws of a conventional and standard size, and without the need for provision for a special threaded bolt and nut. The cost of the corner joint is thus reduced as compared with the known corner joint.
The projecting tongue portion 18 of the locator member 16 enables this extra strength to be obtained in the final construction, and also provides extra space from the board 26, making the final securing operation simple to perform.
A pair of corner joints will normally be used when joining boards or planar members at right angles. In the case of large boards, three or more corner joints would be employed particularly where greater strength is required.
In the most preferred embodiment of the invention the same jig may be used to define the positions for the screw holes in each of the boards 25 and 26.
Claims (9)
1. A method of joining together two planar members at right angles to one another, in which a bridge member, which comprises two legs and a central span joining the two legs, is secured to a surface of a first planar member near an edge thereof such that a tunnel is formed by the central span and the legs of the bridge member and the said surface of the first pianar member, said tunnel being shaped to have a constriction therein, a locator member, which comprises a base member having a projecting tongue portion extending therefrom with a protuberance on the projecting tongue portion at a position remote from the base member, is secured to a surface of a second planar member, the projecting tongue portion is inserted into the tunnel as the first and second planar members are brought together at right angles until the protuberance on the projecting tongue portion has been moved beyond the constriction in the tunnel portion and the first and second planar members are thereby held in the desired juxtaposition at right angles to one another while the joint between the two planar members is made secure by passing a fixing member through the span of the bridge member and the projecting tongue portion of the locator member.
2. A method according to Claim 1, wherein the fixing member is caused to penetrate into the second planar member thereby increasing the strength of the joint.
3. A method according to Claim 1 or Claim 2, wherein the fixing member is a screw.
4. A method according to any one of
Claims 1 to 3, therein the constriction in the said tunnel is formed by shaping inner surfaces of the two legs of the bridge member.
5. A method according to Claim 4, wherein the projecting tongue portion of the locator member tapers in a direction from the base member to the protuberance, and the inner sides of the legs of the bridge member are inclined to mate with the tapered proj ecting portion when the protuberance thereon has been moved beyond the constriction in the tunnel portion.
6. A method according to any one of
Claims 1 to 4, wherein the two planar mem bers are two boards.
7. A corner joint for joining together two planar members at right angles to one another, the joint comprising: a bridge member having a body including legs and a central span joining the two legs and defining therewith a channel the sides of which are inclined towards a constriction at a narrowest part of the channel and then relieved beyond the constriction, a central screw hole being provided through the central span of the bridge member from the upper surface of the bridge member to the channel, and screw holes parallel to the central screw hole being provided through each leg of the bridge member; a locator member comprising a base member having a tongue portion projecting from a central part of the base member, said projecting tongue portion tapering in a direction away from the base member and having protuberances provided by wider sides at the end of the taper, the base member having screw holes therethrough at either side of the projecting tongue portion, which screw holes extend in directions parallel to the direction in which the projecting tongue portion extends from the base member, and the projecting tongue portion having a screw hole therethrough in a direction perpendicular to said direction; and a screw extending through said central screw hole in the bridge member and into the screw hole in the projecting tongue portion of the locator member when the tongue portion is located in the channel by the protuberances engaging the constriction in the channel.
8. A method of joining together two planar members at right angles substantially as hereinbefore described with reference to the accompanying drawings.
9. A corner joint substantially as hereinbefore described with reference to the accompanying drawings.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08521214A GB2179419B (en) | 1985-08-23 | 1985-08-23 | Method of joining two planar members at right angles to one another and corner joint for use therein |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB08521214A GB2179419B (en) | 1985-08-23 | 1985-08-23 | Method of joining two planar members at right angles to one another and corner joint for use therein |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| GB8521214D0 GB8521214D0 (en) | 1985-10-02 |
| GB2179419A true GB2179419A (en) | 1987-03-04 |
| GB2179419B GB2179419B (en) | 1988-11-30 |
Family
ID=10584261
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB08521214A Expired GB2179419B (en) | 1985-08-23 | 1985-08-23 | Method of joining two planar members at right angles to one another and corner joint for use therein |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB2179419B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT392129B (en) * | 1989-03-31 | 1991-01-25 | Stecher Anneliese | ANCHORING FITTING FOR SCREW CONNECTIONS FOR RIGHT-ANGLED FITTING FURNITURE PANELS |
| GB2241038A (en) * | 1990-02-20 | 1991-08-21 | Moores Furniture Group Ltd | Furniture assembly |
| EP0501039A1 (en) * | 1991-02-25 | 1992-09-02 | ITERBY ITALIANA MOBILI S.r.l. | Device for the removable coupling of two elements |
| GB2516374A (en) * | 2013-07-19 | 2015-01-21 | David Crampton | Locking system and method of use thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB935105A (en) * | 1960-11-09 | 1963-08-28 | Rensselaer Powell Saxe Van | Means for connecting together vertically aligned columns of building structures |
| US4148454A (en) * | 1978-05-22 | 1979-04-10 | Keystone Consolidated Industries, Inc. | Bracket assembly |
-
1985
- 1985-08-23 GB GB08521214A patent/GB2179419B/en not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB935105A (en) * | 1960-11-09 | 1963-08-28 | Rensselaer Powell Saxe Van | Means for connecting together vertically aligned columns of building structures |
| US4148454A (en) * | 1978-05-22 | 1979-04-10 | Keystone Consolidated Industries, Inc. | Bracket assembly |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT392129B (en) * | 1989-03-31 | 1991-01-25 | Stecher Anneliese | ANCHORING FITTING FOR SCREW CONNECTIONS FOR RIGHT-ANGLED FITTING FURNITURE PANELS |
| GB2241038A (en) * | 1990-02-20 | 1991-08-21 | Moores Furniture Group Ltd | Furniture assembly |
| GB2241038B (en) * | 1990-02-20 | 1993-12-01 | Moores Furniture Group Ltd | Furniture assembly |
| EP0501039A1 (en) * | 1991-02-25 | 1992-09-02 | ITERBY ITALIANA MOBILI S.r.l. | Device for the removable coupling of two elements |
| GB2516374A (en) * | 2013-07-19 | 2015-01-21 | David Crampton | Locking system and method of use thereof |
| GB2516374B (en) * | 2013-07-19 | 2016-04-20 | David Crampton | Locking system and method of use thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| GB8521214D0 (en) | 1985-10-02 |
| GB2179419B (en) | 1988-11-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PCNP | Patent ceased through non-payment of renewal fee |