Patent Publication Number: US-9410327-B2

Title: Joint guard for panels

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a continuation of and claims priority to U.S. patent application Ser. No. 12/278,274 filed Dec. 17, 2008, which claims priority to PCT/SE07/00070 filed Jan. 26, 2007, which claims priority to Swedish Application No. 0600227-3 filed on Feb. 3, 2006, the entire disclosures of which are incorporated herein by reference. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to a joint guard used when cutting panels. 
     BACKGROUND 
     Prefabricated floor boards provided with tongue and groove at the edges are quite common nowadays. These can be installed by the average handy man as they are very easy to install. Such floors can, for example, be constituted of solid wood, fiber board or particle board. These are most often provided with a surface layer such as lacquer, or some kind of laminate. The boards are most often installed by being glued via tongue and groove. The most common types of tongue and groove are however burdened with the disadvantage of forming gaps of varying width between the floor boards in cases where the installer has not been thorough. Dirt will easily collect in such gaps. Moisture will furthermore enter the gaps which will cause the core to expand in cases where it is made of wood, fiber board or particle board, which usually is the case. The expansion will cause the surface layer to rise closest to the edges of the joint which radically reduces the useful life of the floor since the surface layer will be exposed to exceptional wear. Different types of tensioning devices forcing the floor boards together during installation can be used to avoid such gaps. This operation is however more or less awkward. It is therefore desirable to achieve a joint which is self-guiding and thereby automatically finds the correct position. Such a joint would also be possible to utilize in floors where no glue is to be used. 
     Different types of joints with mechanical locking have been made available. One such joint is known through WO 94/26999. Here a lower lip is present in the form a thin strip which in selected embodiments is made of thin, aluminum sheets. This is a delicate part which is easily damaged when cutting the panel in connection to the assembly. The same problem applies to some extent on embodiments known through WO 97/47834. The locking parts of these types of floor panels are delicate and easily damaged but once properly installed are still very strong. It is an object of the present disclosure to solve the problem connected to the cutting and assembly of these and similar type of floor panels being provided with delicate locking parts. 
     SUMMARY 
     It has through the present disclosure been made possible to protect the delicate edges of panels provided with locking members. Accordingly, the present disclosure relates to a joint guard intended to be used in connection with the installation of floor panels. The present disclosure is characterized in that the joint guard is provided with means for protecting and stabilizing portions of the edge region of a panel. These portions are selected from the group consisting of: a distal edge, a downwards protruding heel, an upper joint edge, a groove, a lower cheek, a distal end, an upwards protruding lower cheek heel, an upper joining edge, an undercut, a moveable locking element, a locking tongue, a locking tongue leg, a maneuvering leg and a face section. 
     According to one embodiment the joint guard is provided with a locking tongue stopper. The locking tongue stopper is intended to ensure that the moveable locking element is kept in a default position during the milling as well as keeping it from getting caught in the teeth of the saw during the cutting operation. 
     According to one embodiment the joint guard is provided with a locking tongue leg support and a maneuvering leg support. The locking tongue leg support and maneuvering leg support is intended to ensure that the moveable locking element and maneuvering leg is kept in a default position during the milling as well as keeping it from getting caught in the teeth of the saw during the cutting operation. 
     According to one embodiment the joint guard is provided with a locking tongue leg support and a face section support. The locking tongue leg support and a face section support is intended to ensure that the locking tongue leg and a face section is kept from getting caught in the teeth of the saw and thereby deformed during the cutting operation. 
     It is possible to make the joint guard from a multitude of different materials such as a thermoplastic material, a metal, a thermosetting material, wood, wood fiber and wood particles. 
     The disclosure also relates to a joint guard provided with means for protecting and stabilizing portions in the edge region of a panel. The portions are selected from the group consisting of: a tongue, a rear groove, a lower cheek, a distal end, an inner locking groove, a tongue groove, a locking member surface, a moveable locking member, an inner locking tongue, a maneuvering cheek and an outer locking tongue. 
     According to one embodiment the joint guard is provided with a maneuvering cheek support. The maneuvering cheek support is intended to ensure that the moveable locking element is kept in a default position during the milling as well as keeping it from getting caught in the teeth of the saw during the cutting operation. 
     According to one embodiment the joint guard is provided with an outer locking tongue support. The outer locking tongue support is intended to ensure that the moveable locking element is kept in a default position during the milling as well as keeping it from getting caught in the teeth of the saw and deformed during the cutting operation. 
     As is understood by the accompanying drawings the moveable locking element may be applied on either the groove portion, or the tongue portion of a joint. In order to ensure a correct positioning of the joint guard on the groove portion provided with a moveable locking element, it is advantageous to provide a joint guard with a groove engaging tongue. In cases where the moveable locking element is arranged on the tongue portion, the joint guard is suitably provided with a tongue engaging groove for ensuring a correct positioning. 
     It is possible to make the joint guard from a multitude of different materials such as a thermoplastic material, a metal, a thermosetting material, wood, wood fiber and wood particles. 
     The joint guard according to the present disclosure is primarily used during cutting of panels and is then applied to the edge very much like another panel would be. The biggest difference between another panel and the joint guard is that the joint guard is designed not to engage or activate the different locking mechanisms of the panel edge. As will be evident when studying enclosed embodiment examples of joints , some embodiments of joints will not be easily disassembled once two panels are joined together. The joint guard is therefore designed to hold the locking mechanism in place without activating it. The joint guard is furthermore so designed as to not cause any substantial wear or deformation on functional parts such as locking edges and the like on embodiments herein described as well as on embodiment disclosed by reference. The joint guard is then applied on the edge of the panel to be cut and the cutting may commence. The cutting is either performed through the joint guard or using the joint guard as a ruler. It is however advantageous to arrange the joint guard on the portion of the panel that is to be used in the installation. The joint guard is advantageously also used as a tapping block during the installation of floor panels. 
     In selected embodiments of joints the joint guard may serve as tool for returning moveable locking elements to default position in case these by accident is out of the pre-assembly position. 
     Floor panel joints may be designed in different ways, as for example as known through WO 94/26999, WO 97/47834 and WO 03/083234. It is also possible to provide the joint with a resilient joining member made as a separate piece which is joined with the edge of the panel. Such joints are known through WO 00/47841 and WO 2005/054599. Also herein disclosed embodiments of joints serve as examples of joints which benefit from being protected during cutting. 
     A joint has a first edge and a second edge. The first edge is provided with a distal edge and a downwards protruding heel. The distal edge is further provided with an upper joint edge beneath which a groove is arranged. The second edge is provided with lower cheek having a distal end at which an upwards protruding lower cheek heel is arranged. The second edge is further provided with an upper joining edge beneath which an undercut is arranged. A moveable locking element is arranged in the space created by the undercut. The moveable locking element has a locking tongue, a locking tongue leg and a maneuvering leg. The second edge is intended to join with the first edge through vertical motion. The moveable locking element, or more precisely the locking tongue of the locking element, will be displaced by the vertical motion when the two edges are moved towards each other. The displacement can be seen as a rotation where the locking tongue is brought to rotate around a selected pivot point. Resilient action may also realize this rotating action. 
     Suitably, the downwards protruding heel presses on the maneuvering leg, thereby urging the locking tongue to move forward and engage the groove. An upper locking surface of the locking tongue is suitably longer than the portion of the locking tongue that can engage the groove. 
     The lower cheek heel suitably has a front face and the downwards protruding heel has a rear face. The front face and the rear face are then preferably intended to interact, the interaction resulting in the upper joint edge and the upper joining edge being urged together in an assembled joint. 
     According to one alternative the lower cheek heel suitably has a front face and the downwards protruding heel has a rear face while the maneuvering leg has a face section. The front face and the rear face are then preferably intended to interact, having the face section in an intermediate position, the interaction resulting in the upper joint edge and the upper joining edge being urged together in an assembled joint. 
     According to one special embodiment the locking element is provided with a hinge. This will allow a snap-action cam lock effect. 
     A moveable locking element may suitably be made through extrusion molding and it can be made of thermoplastic material, thermosetting material or even of metal. 
     According to another alternative the joint have a first edge and a second edge where the first edge is provided with a tongue and a rear groove. The second edge is provided with a lower cheek having a distal end, an inner locking groove, a tongue groove and a locking member surface. The moveable locking member is arranged on the locking member surface. The moveable locking member has an inner locking tongue, a maneuvering cheek and an outer locking tongue. The second edge is intended to join with the first edge through horizontal motion. 
     Suitably, a maneuvering area beneath the tongue can press on the maneuvering cheek urging the inner locking tongue to move downwards and engage the inner locking groove. The maneuvering area beneath the tongue can suitably press on the maneuvering cheek also urging the outer locking tongue to move upwards and engage the rear groove. 
     A moveable locking element like herein described may suitably be made through extrusion molding and it can be made of thermoplastic material, thermosetting material, a composite material or even of metal. 
     The joint as herein described is suitably used on products such as floor panels or wall panels. According to another embodiment, a floor panel can include a core which is covered with an upper decorative surface. The core most often consists of wood particles or fiber bonded together with glue or resin. Such core boards are commonly known as Medium Density Fiber board (MDF), High Density Fiber board (HDF), Oriented Strand Board (OSB) or particle board. It is, however, also possible to utilize the embodiments on cores made of solid wood. Since wood based core materials are sensitive to moisture it may be advantageous to treat the area closest to the joint if the floor is to be exposed to moisture. This treatment may suitably include resin, wax or some kind of lacquer. It will not be necessary to treat the joint if the panels are to be glued since the glue itself will protect the joint from moisture penetration. The decorative upper surface may consist of a decorative paper possibly impregnated with melamine-formaldehyde resin. One or more layers of so called overlay paper of cellulose, impregnated with melamine-formaldehyde resin can be suitably placed on top of the decorative paper. One or more of the above layers may be sprinkled with hard particles, of for example aluminum oxide, silicon carbide or silicon oxide in connection to the impregnation in order to improve the abrasion resistance. The paper impregnated with resin is cured before, or in connection to applying it to the core. The paper layers are suitably laminated together before they are applied to the core in cases where the upper decorative surface is constituted by more than one paper layers. The lower side may suitably be coated with a lacquer or a resin impregnated paper. It is also possible to arrange an impregnated support paper between the decor and the core. 
     A plurality of possible upper surfaces can be applied to the core. For example, thermosetting laminates including at least a decorative paper impregnated with melamine-formaldehyde resin can be applied to the core. Overlay paper and hard particles may be added to this as described earlier in the present application. The upper decorative surface may also be constituted by an acrylic foil, an acrylic lacquer and combinations thereof. It might also be constituted by a foil or a lacquer of polyolefins or polyolefin derivatives. It is also possible to coat a decorative surface with an acrylic lacquer containing, or being sprinkled with, hard particles of α-aluminum oxide, silicon carbide or silicon oxide. The coating is most often achieved through use of a roller or through curtain coating. Among suitable acrylic lacquers can be mentioned radiation curing ones which are cured with electron beam or ultraviolet light forming free radicals in the uncured lacquer. It is further possible to use wood veneer, most often coated with oil, wax or lacquer. 
     It has also shown that herein described joints are well suited for other materials as well. It is for example possible to use the joints on cores made of mineral based materials such as stone like marble, granite, slate, diabase, sandstone, limestone and the like. It is also possible to use the joints on cores made of ceramic, ceramic-like or composite materials like brick, concrete, fiber cement, glazed and non-glazed ceramic tiles. Some of these materials may be polished as the only surface treatment, while glazing, painting or oil treatment is an example of other surface treatments possible to utilize on above mentioned core materials. It is of course also possible, as described together with wood based core materials, to arrange thermosetting laminates including at least a decorative paper impregnated with melamine-formaldehyde resin. Overlay paper and hard particles may be added to this as described earlier in the present application. The upper decorative surface may also be constituted by an acrylic foil, an acrylic lacquer and combinations thereof. It might also be constituted by a foil or a lacquer of polyolefins or polyolefin derivatives. 
    
    
     
       BRIEF DESCRIPTION OF EMBODIMENT JOINT EXAMPLES 
       The disclosure is further described together with drawing showing different embodiments whereby, 
         FIG. 1 a - b    shows a first embodiment of a joint  1 ; 
         FIG. 2 a - b    shows a second embodiment of a joint  1 ; 
         FIG. 3 a - b    shows a third embodiment of a joint  1 ; 
         FIG. 4 a - b    shows a fourth embodiment of a joint  1 ; 
         FIG. 5 a - b    shows a fifth embodiment of a joint  1 ; 
         FIG. 6 a - b    shows a sixth embodiment of a joint  1 ; 
         FIG. 6 c   shows an alternative version of the sixth embodiment shown in  FIG. 6 a - b    of a joint  1 ; 
         FIG. 7 a - b    shows a seventh embodiment of a joint  1 ; 
         FIG. 8 a - b    shows a eighth embodiment of a joint  1 ; 
         FIG. 9  shows a ninth embodiment of a joint  1 ; and 
         FIG. 10 a - b    shows a tenth embodiment of a joint  1 . 
       BRIEF DESCRIPTION OF PREFERRED EMBODIMENT EXAMPLES 
         FIG. 11  shows a first embodiment of a joint guard  100  according to the invention. 
         FIG. 12  shows a second embodiment of a joint guard  100  according to the invention. 
         FIG. 13  shows a third embodiment of a joint guard  100  according to the invention. 
         FIG. 14  shows a fourth embodiment of a joint guard  100  according to the invention. 
         FIG. 15  shows a fifth embodiment of a joint guard  100  according to the invention. 
         FIG. 16  shows a sixth embodiment of a joint guard  100  according to the invention. 
         FIG. 17  shows a seventh embodiment of a joint guard  100  according to the invention. 
         FIG. 18  shows a eighth embodiment of a joint guard  100  according to the invention. 
         FIG. 19  shows a variation of the fourth embodiment, shown in  FIG. 14 , of a joint guard  100  according to the invention. 
         FIG. 20  shows another variation of the fourth embodiment, shown in  FIG. 14 , of a joint guard  100  according to the invention. 
         FIG. 21  shows a variation of the eighth embodiment, shown in  FIG. 18 , of a joint guard  100  according to the invention. 
         FIG. 22  shows another variation of the eighth embodiment, shown in  FIG. 18 , of a joint guard  100  according to the invention. 
     
    
    
     DETAILED DESCRIPTION OF EMBODIMENT JOINT EXAMPLES 
     Accordingly,  FIG. 1 a - b    shows in cross-section a joint  1  having a first edge  2  and a second edge  3  according to a first embodiment.  FIG. 1  a shows the joint  1  just before the joining and  FIG. 1 b    shows the joint  1  after assembly. The first edge  2  is provided with a distal edge  21  and a downwards protruding heel  22 . The distal edge  21  is further provided with an upper joint edge  25  beneath which a groove  23  is arranged. The second edge  3  is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The second edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The second edge  3  is intended to join with the first edge  2  through vertical motion. 
     The downwards protruding heel  22  thereby presses on the maneuvering leg  43  urging the locking tongue  41  to move forward and engage the groove  23 . To ensure this, an upper locking surface  410  of the locking tongue  41  is longer than the portion of the locking tongue  41  that can engage the groove  23 . The lower cheek heel  33  have a front face  36  while the downwards protruding heel  22  have a rear face  26 . The front face  36  and the rear face  26  are intended to interact which results in the upper joint edge  25  and the upper joining edge  35  being urged together in an assembled joint  1 . 
       FIG. 2 a - b    shows, in cross-section, a joint  1  having a first edge  2  and a second edge  3  according to a second embodiment.  FIG. 2 a    shows the joint  1  just before the joining and  FIG. 2 b    shows the joint  1  after assembly. The first edge  2  is provided with a distal edge  21  and a downwards protruding heel  22 . The distal edge  21  is further provided with an upper joint edge  25  beneath which a groove  23  is arranged. The second edge  3  is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The second edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The second edge  3  is intended to join with the first edge  2  through vertical motion. The maneuvering leg  43  is here extended to increase the locking force. The downwards protruding heel  22  hereby presses on the maneuvering leg  43  urging the locking tongue  41  to move forward and engage the groove  23 . To ensure this, an upper locking surface  410  of the locking tongue  41  is longer than the portion of the locking tongue  41  that can engage the groove  23 . The lower cheek heel  33  have a front face  36  while the downwards protruding heel  22  have a rear face  26 . The front face  36  and the rear face  26  are intended to interact which results in the upper joint edge  25  and the upper joining edge  35  being urged together in an assembled joint  1 . 
       FIG. 3 a - b    shows, in cross-section, a joint  1  having a first edge  2  and a second edge  3  according to a third embodiment.  FIG. 3 a    shows the joint  1  just before the joining and  FIG. 3 b    shows the joint  1  after assembly. The first edge  2  is provided with a distal edge  21  and a downwards protruding heel  22 . The distal edge  21  is further provided with an upper joint edge  25  beneath which a groove  23  is arranged. The second edge  3  is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The second edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The second edge  3  is intended to join with the first edge  2  through vertical motion. The maneuvering leg  43  is here extended further to increase the locking force. The downwards protruding heel  22  hereby presses on the maneuvering leg  43  urging the locking tongue  41  to move forward and engage the groove  23 . To ensure this, an upper locking surface  410  of the locking tongue  41  is longer than the portion of the locking tongue  41  that can engage the groove  23 . The lower cheek heel  33  have a front face  36  while the downwards protruding heel  22  have a rear face  26 . The lower cheek heel  33  have a front face  36  while the downwards protruding heel  22  have a rear face  26  and the maneuvering leg have a face section  430 . The front face  36  and the rear face  26  are intended to interact, having the face section  430  in an intermediate position. The interaction results in the upper joint edge  25  and the upper joining edge  35  being urged together in an assembled joint  1 . 
       FIG. 4 a - b    shows in cross-section a joint  1  having a first edge  2  and a second edge  3  according to a fourth, embodiment.  FIG. 4 a    shows the joint  1  just before the joining and  FIG. 4 b    shows the joint  1  after assembly. The first edge  2  is provided with a distal edge  21  and a downwards protruding heel  22 . The distal edge  21  is further provided with an upper joint edge  25  beneath which a groove  23  is arranged. The second edge  3  is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The second edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The second edge  3  is intended to join with the first edge  2  through vertical motion. The maneuvering leg  43  is provided with a hinge which allows a cam lock effect. 
     The downwards protruding heel  22  hereby presses on the maneuvering leg  43  urging the locking tongue  41  to move forward and engage the groove  23 . To ensure this, an upper locking surface  430  of the locking tongue  41  is longer than the portion of the locking tongue  41  that can engage the groove  23 . The lower cheek heel  33  have a front face  36  while the downwards protruding heel  22  have a rear face  26 . The front face  36  and the rear face  26  are intended to interact which results in the upper joint edge  25  and the upper joining edge  35  being urged together in an assembled joint  1 . 
       FIG. 5 a - b    shows in cross-section a joint  1  having a first edge  2  and a second edge  3  according to a fifth embodiment.  FIG. 5 a    shows the joint  1  just before the joining and  FIG. 5 b    shows the joint  1  after assembly. The fifth embodiment is an alternative embodiment. The first edge  2  is provided with a distal edge  21  and a downwards protruding heel  22 . The distal edge  21  is further provided with an upper joint edge  25  beneath which a groove  23  is arranged. The second edge  3  is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The second edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The second edge  3  is intended to join with the first edge  2  through vertical motion. 
     A front surface  22   I  of the downwards protruding heel  22  hereby presses on the maneuvering leg  43  urging the bent maneuvering leg  43  to straighten whereby the locking tongue  41  moves forward and engage the groove  23 . The lower cheek heel  33  have a front face  36  while the downwards protruding heel  22  have a rear face  26 . The front face  36  and the rear face  26  are intended to interact which results in the upper joint edge  25  and the upper joining edge  35  being urged together in an assembled joint 
       FIG. 6 a - b    shows in cross-section a joint  1  having a first edge  2  and a second edge  3  according to a sixth.  FIG. 6 a    shows the joint  1  just before the joining and  FIG. 6 b    shows the joint  1  after assembly.  FIG. 6 c    shows an alternative embodiment of the embodiment shown in  FIG. 6 a - b   . Beginning with  FIG. 6 a - b   , the first edge  2  is provided with a distal edge  21  and a downwards protruding heel  22 . The distal edge  21  is further provided with an upper joint edge  25  beneath which a groove  23  is arranged. The second edge  3  is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The second edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The moveable locking element  40  is further provided with a pivot groove  43   I . The lower cheek  31  is provided with a pivot edge  31   I . The pivot groove  43  and the pivot edge  31   I  are intended to interact. The second edge  3  is intended to join with the first edge  2  through vertical motion. 
     A front surface  22   I  of the downwards protruding heel  22  hereby presses on the maneuvering leg  43  urging the maneuvering leg  43  to tilt with the pivot edge  31   I  as an axis of rotation whereby the locking tongue  41  moves forward and engage the groove  23 . The lower cheek heel  33  have a front face  36  while the downwards protruding heel  22  have a rear face  26 . The front face  36  and the rear face  26  are intended to interact which is resulting in the upper joint edge  25  and the upper joining edge  35  being urged together in an assembled joint  1 . The lower cheek  31 , the downwards protruding heal  22  and the maneuvering leg  43  are further designed so that the outermost portion of the maneuvering leg  43  is held in place by the downwards protruding heal  22  and the lower cheek  31  when the joint is assembled. 
       FIG. 6 c    mainly corresponds to  FIG. 6 a - b    above. The upper portion of the lower cheek  31  containing lower cheek heal  33 , front face  36  and pivot edge  31   I  is, however made of a separate material which is joined with the core material with for example glue. It is, however also possible to attach this portion by nailing, prizing or snapping it into position. 
       FIG. 7 a - b    shows in cross-section a joint  1  having a first edge  2  and a second edge  3  according to a seventh embodiment.  FIG. 7 a    shows the joint  1  just before the joining and  FIG. 7 b    shows the joint  1  after assembly. The seventh embodiment is an alternative embodiment where the joint is assembled through horizontal motion. The joint  1  have a first edge  2  and a second edge  3  wherein the first edge  2  is provided with a tongue  50  and a rear groove  51 . The second edge  3  is provided with a lower cheek  61  having a distal end  62 , an inner locking groove  63 , a tongue groove  64  and a locking member surface  65 . A moveable locking member  70  is arranged on the locking member surface  65 . The moveable locking member  70  have an inner locking tongue  71 , a maneuvering cheek  72  and an outer locking tongue  73 . As said above the second edge  3  is intended to join with the first edge  2  through horizontal motion according to this, seventh embodiment. A maneuvering area  52  beneath the tongue  50  presses on the maneuvering cheek  72  urging the inner locking tongue  71  to move downwards and engage the inner locking groove  63 . At the same time the outer locking tongue  72  will move upwards and engage the rear groove  51 . 
       FIG. 8 a - b    shows in cross-section a joint  1  having a first edge  2  and a second edge  3  according to an eighth embodiment.  FIG. 8 a    shows the joint  1  just before the joining and  FIG. 8 b    shows the joint  1  after assembly. The eighth embodiment is an alternative embodiment where the joint is assembled through horizontal motion. The joint  1  have a first edge  2  and a second edge  3  wherein the first edge  2  is provided with a tongue  50  and a rear depression  53 . The second edge  5  is provided with a lower cheek  61  having a distal end  62 , an inner locking groove  63  and a tongue groove  64 . A moveable locking member  70  is arranged on first edge  2 . The moveable locking member  70  have a maneuvering cheek  72  and an outer locking tongue  73 . As said above the second edge  3  is intended to join with the first edge  2  through horizontal motion according to this, eighth embodiment. The outer locking tongue  73  is urged upwards into the rear depression  53  during the assembly. It will then snap down into engagement with inner locking groove  63  once in the fully assembled position. 
       FIG. 9  shows in cross-section a joint  1  having a first edge  2  and a second edge  3  according to a ninth embodiment.  FIG. 9  shows the joint  1  just before the joining. The ninth embodiment is an alternative embodiment where the joint is assembled through horizontal motion. The joint  1  have a first edge  2  and a second edge  3  wherein the first edge  2  is provided with a tongue  50  and a rear groove  51 . The second edge  3  is provided with a lower cheek  61  having a distal end  62 , an inner locking groove  63  and a tongue groove  64 . A moveable locking member  70  is arranged on the first edge  2 . The moveable locking member  70  have an inner locking tongue  71 , a maneuvering cheek  72  and an outer locking tongue  73 . As said above the second edge  3  is intended to join with the first edge  2  through horizontal motion according to this, ninth embodiment. The outer locking tongue  73  and the inner locking tongue  71  are urged upwards during the assembly. The outer locking tongue  73  will then snap down into engagement with inner locking groove  63  once in the fully assembled position. 
       FIG. 10 a - b    shows in cross-section a joint  1  having a first edge  2  and a second edge  3  according to a tenth embodiment.  FIG. 10 a    shows the joint  1  just before the joining and  FIG. 10 b    shows the joint  1  after assembly. The first edge  2  is provided with a distal edge  21  and a downwards protruding heel  22 . The distal edge  21  is further provided with an upper joint edge  25  beneath which an undercut space  23   I  is arranged. The second edge  3  is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The second edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut space  23   I . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  also acting as a maneuvering leg  43 . The second edge  3  is intended to join with the first edge  2  through vertical motion. The lower cheek heel  33  have a front face  36  while the downwards protruding heel  22  have a rear face  26 . The lower cheek heel  33  have a front face  36  while the downwards protruding heel  22  have a rear face  26  and the moveable locking element  40  have a face section  430 . The front face  36  and the rear face  26  are intended to interact, having a face section  430  in an intermediate position. The interaction results in the upper joint edge  25  and the upper joining edge  35  being urged together in an assembled joint  1 . The Socking tongue  41  will engage the undercut  34  when the edges  2  and  3  respectively are fully assembled. 
     DETAILED DESCRIPTION OF PREFERRED EMBODIMENT EXAMPLES 
       FIG. 11  shows a first embodiment of a joint guard  100  according to the disclosure. An edge  3  as shown in  FIG. 1 a - b    is provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The edge  3  is intended to join with a first edge  2  (see  FIG. 1 a - b   ) through vertical motion. A joint guard  100  is provided with means for protecting and stabilizing portions in the edge region of the panel. The portions protected and stabilized are: a lower cheek  31 , a distal end  32 , an upwards protruding lower cheek heel  33 , an upper joining edge  35 , an undercut  34 , a moveable locking element  40 , a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . Accordingly, the joint guard  100  is provided with a locking tongue stopper  141 , a locking tongue leg support  142  and a maneuvering leg support  143 . The joint guard  100  is suitably made of medium density fiber board (MDF). 
       FIG. 12  shows a second embodiment of a joint guard  100  according to the invention. An edge  3  as shown in  FIG. 3 a - b    is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The second edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The second edge  3  is intended to join with the first edge  2  (see  FIG. 3 a - b   ) through vertical motion. The maneuvering leg  43  is here extended further to increase the locking force. The lower cheek heel  33  have a front face  36  and the maneuvering leg  43  have a face section  430 . A joint guard  100  is provided with means for protecting and stabilizing portions in the edge region of the panel. The portions protected and stabilized are: a lower cheek  31 , a distal end  32 , an upwards protruding lower cheek heel  33 , an upper joining edge  35 , an undercut  34 , a moveable locking element  40 , a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . Accordingly, the joint guard  100  is provided with a locking tongue stopper  141 , a locking tongue leg support  142  and a maneuvering leg support  143 , The joint guard  100  is suitably made of medium density fiber board (MDF). 
       FIG. 13  shows a third embodiment of a joint guard  100  according to the invention. An edge  3  as shown in  FIG. 3 a - b    is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The second edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The second edge  3  is intended to join with the first edge  2  (see  FIG. 3 a - b   ) through vertical motion. The maneuvering leg  43  is here extended further to increase the locking force. The lower cheek heel  33  have a front face  36  and the maneuvering leg have a face section  430 . A joint guard  100  is provided with means for protecting and stabilizing portions in the edge region of the panel. The portions protected and stabilized are: a lower cheek  31 , a distal end  32 , an upwards protruding lower cheek heel  33 , an upper joining edge  35 , an undercut  34 , a moveable locking element  40 , a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . Accordingly, the joint guard  100  is provided with a locking-tongue stopper  141  and a maneuvering leg support  143 . The distal edge of the maneuvering leg  43  is supported by a vertical surface  142   I . The joint guard  100  is suitably made of medium density fiber board (MDF). 
       FIG. 14  shows a fourth embodiment of a joint guard  100  according to the invention. An edge  3  as shown in  FIG. 6 a - b    is provided with a lower cheek  31  having a distal end  32  at which an upwards protruding lower cheek heel  33  is arranged. The edge  3  is further provided with an upper joining edge  35  beneath which an undercut  34  is arranged. A moveable locking element  40  is arranged in the space created by the undercut  34 . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . The moveable locking element  40  is further provided with a pivot groove  43   I . The lower cheek  31  is provided with a pivot edge  31   I . The pivot groove  43   I  and the pivot edge  31   I  are intended to interact. The second edge  3  is intended to join with the first edge  2  (see  FIG. 6 a - b   ) through vertical motion. The lower cheek heel  33  has a front face  36 . A joint guard  100  is provided with means for protecting and stabilizing portions in the edge region of the panel. The portions protected and stabilized are: a lower cheek  31 , a distal end  32 , an upwards protruding lower cheek heel  33 , an upper joining edge  35 , an undercut  34 , a moveable locking element  40 , a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43 . Accordingly, the joint guard  100  is provided with a locking tongue stopper  141  and a maneuvering leg support  143 . The joint guard  100  is suitably made of medium density fiber board (MDF). 
       FIG. 15  shows a fifth embodiment of a joint guard  100  according to the invention. A second edge  3  as shown in  FIG. 7 a - b    is provided with a lower cheek  61  having a distal end  62 , an inner locking groove  63 , a tongue groove  64  and a locking member surface  65 . A moveable locking member  70  is arranged on the locking member surface  65 . The moveable locking member  70  have an inner locking tongue  71 , a maneuvering cheek  72  and an outer locking tongue  73 . The second edge  3  is intended to join with the first edge  2  (see  FIG. 7 a - b   ) through horizontal motion. A joint guard  100  is provided with means for protecting and stabilizing portions in the edge region of a panel. These portions are: a lower cheek  61 , an inner locking groove  63 , a tongue groove  64 , a locking member surface  65 , a moveable locking member  70 , an inner locking tongue  71 , a maneuvering cheek  72  and an outer locking tongue  73 . The joint guard  100  supports, protect and stabilize through means of a maneuvering cheek support  172 , an outer locking tongue support  173  and a groove engaging tongue  164 . The joint guard  100  is suitably made of medium density fiber board (MDF). 
       FIG. 16  shows a sixth embodiment of a joint guard  100  according to the invention. A first edge  2  as shown in  FIG. 8 a - b    is provided with a tongue  50  and a rear depression  53 . A moveable locking member  70  is arranged on first edge  2 . The moveable locking member  70  have a maneuvering cheek  72  and an outer locking tongue  73 . A second edge  3  (see  FIG. 8 a - b   ) is intended to join with the first edge  2  through horizontal motion. The outer locking tongue  73  is urged upwards into the rear depression  53  during the assembly. It will then snap down into engagement with inner locking groove  63  (see  FIG. 8 a - b   ) once in the fully assembled position. A joint guard  100  is provided with means for protecting and stabilizing portions in the edge region of a panel. These portions are: a moveable locking member  70 , a maneuvering cheek  72 , an outer locking tongue  73  and a tongue  50 . The joint guard  100  supports, protects and stabilizes through a maneuvering cheek support  172 , an outer locking tongue support  173  and a tongue engaging groove  150 . Also the vertical edge portions of the joint are protected. The joint guard  100  is suitably made of medium density fiber board (MDF). 
       FIG. 17  shows a seventh embodiment of a joint guard  100  according to the invention. A first edge  2  as shown in  FIG. 10 a - b    is provided with a distal edge  21  and a downwards protruding heel  22 . The distal edge  21  is further provided with an upper joint edge  25  beneath which an undercut space  23   I  is arranged. A moveable locking element  40  is arranged in the space created by the undercut space  23   I . The moveable locking element  40  has a locking tongue  41 , a locking tongue leg  42  also acting as a maneuvering leg  43 . The second edge  3  (see  FIG. 10 a - b   ) is intended to join with the first edge  2  through vertical motion. The downwards protruding heel  22  have a rear face  26  and the moveable locking element  40  have a face section  430 . A joint guard  100  is provided with means for protecting and stabilizing portions in the edge region of the panel. The portions protected and stabilized are: a distal edge  21 , a downwards protruding heel  22 , an upper joint edge  25 , an undercut space  23   I , a rear face  26 , a moveable locking element  40 , a locking tongue  41 , a locking tongue leg  42  and a maneuvering leg  43  and a face section  430 . Accordingly, the joint guard  100  is provided with a locking tongue stopper  141 , a maneuvering leg support  143  and a face section support  136 . The joint guard  100  is suitably made of medium density fiber board (MDF). 
       FIG. 18  shows a eighth embodiment of a joint guard  100  according to the invention. A second edge  3  known through WO 94/26999 is provided with a lower cheek  61  having a distal end  62 . A bendable locking member  70  is arranged on a second edge  3 . The bendable locking member  70  has an outer locking tongue  73 . A joint guard  100  is provided with means for protecting and stabilizing portions in the edge region of a panel. These portions are: a lower cheek  61 , a distal end  62 , a bendable locking member  70  and an outer locking tongue  73 . The joint guard  100  support, protect and stabilize through means of an outer locking tongue support  173  and a groove engaging tongue  164 . The basic principle of the joint guard  100  shown in  FIG. 18  is also applicable on joints as described in WO 03/083234. The joint guard  100  is suitably made of medium density fiber board (MDF). 
       FIG. 19  shows a variation of the fourth embodiment, shown in  FIG. 14 , of a joint guard  100  according to the invention. The joint guard  100  is provided with a locking tongue stopper  141  and a maneuvering leg support  143  as described in  FIG. 14 . The joint guard  100  according to the alternative embodiment shown in  FIG. 19  is further provided with an top surface edge guard  110  intended protect the edge of a top surface laminate during cutting, especially from splitting and separating in the edge region. 
       FIG. 20  shows another variation of the fourth embodiment, shown in  FIG. 14 , of a joint guard  100  according to the invention. Above what is described in figure connection to  14  and  19  the joint guard is further provided with a handle  111  used for holding the joint guard  100  in place during for example cutting. The handle  111  is especially useful when using the joint guard  100  as a tapping block. 
       FIG. 21  shows a variation of the eighth embodiment, shown in  FIG. 18 , of a joint guard  100  according to the invention. The joint guard  100  supports, protect and stabilize through means of an outer locking tongue support  173  and a groove engaging tongue  164 . The joint guard  100  according to the alternative embodiment shown in  FIG. 21  is further provided with a top surface edge guard  110  intended protect the edge of a top surface laminate during cutting, especially from splitting and separating in the edge region. The groove engaging tongue  164  is also made more shallow and tapered compared to the embodiment shown in  FIG. 18 . 
       FIG. 22  shows another variation of the eighth embodiment, shown in  FIG. 18 , of a joint guard  100  according to the invention. Above what is described in connection to  FIGS. 18 and 21  the joint guard is further provided with a handle  111  used for holding the joint guard  100  in place during for example cutting. The handle  111  is especially useful when using the joint guard  100  as a tapping block. The groove engaging tongue  164  of  FIGS. 18 and 21  is furthermore omitted in the embodiment shown in  FIG. 22 . 
     The invention is not limited by the embodiments shown as they can be varied in different ways within the scope of the invention.