TW201428170A - L-shaped corner connection device - Google Patents

Abstract

An L-shaped corner connection device is assembled to a corner of aluminum door/window frame and comprises a first piece, which is a hollow aluminum extrusion member extending in a length direction and comprises at least one first snap coupling section extending in the length direction thereof; and a second piece, which is a hollow aluminum extrusion member extending in a length direction and comprises at least one second snap coupling section extending in the length direction thereof. The second snap coupling section is coupled to the first snap coupling section correspondingly to allow the first piece and the second piece jointed to form an L-shaped structure body. The L-shaped corner connection device is mounted in a hollow groove formed in the corner of the aluminum door/window frame with the first piece horizontally fit, in the length direction thereof, into a hollow groove of a horizontal branch of the aluminum door/window frame and the second piece vertically fit, in the length direction thereof, into a hollow groove of a vertical branch of the aluminum door/window frame so as to simplify the assembly operation of a 45 DEG corner of aluminum door/window frame and to improve the assembly strength thereof.

Description

L-shaped joint device

The invention relates to an L-shaped joint device, in particular to a combined L-shaped joint structure, which is installed on the corner end of a door window frame to simplify the assembly work of the door and window frame joint angle and improve the joint strength. .

According to the general, the angle between the horizontal and vertical ends of the door and window frame is roughly divided into two angles of 45 degrees and 90 degrees. Among them, in the 45 degree angle mode, the shape and size of the horizontal and straight supports are equal ( The same aluminum extruded frame material is cut at a 45-degree cross section at the corners and then aligned and locked. This 45-degree joint is generally assembled with an L-shaped joint block, and is currently used. L-shaped joint blocks are roughly classified into plastic or metal.

As shown in Fig. 1, the plastic L-shaped joint block 1 is a plastic injection body, and the two strips 11 and 12 which are mutually 90 degrees are respectively placed on the 45-degree joint end of the door and window frame. In the hollow groove of the straight support, the screw 13 is respectively passed through the side of the door and window frame, and the side of the straight branch is locked to the side of the support bars 11, 12 to complete the assembly work, and the support bars 11 and 12 can be matched. The positioning frame 15 is arranged on the door and window frame so that the sleeves are not easily twisted after being nested and positioned, although the section 14 of the strips 11 and 12 can be designed to fit tightly into the horizontal and straight hollow slots and securely clamped. Live, however, because the strength of plastic materials is insufficient, it is unable to meet the needs of the use of doors and windows with large bearing capacity or force, such as laminated glass windows or push windows, which are prone to deformation damage and reduce service life.

As shown in Fig. 2, the aluminum L-shaped joint block 2 is cut one by one by a long L-shaped aluminum extruded body (as shown by the extended dashed line), and the two strips of 90 degrees are mutually The 22 series are respectively placed in the horizontal and straight-supported hollow slots of the 45-degree joint end of the door and window frame, and then the screws are respectively passed through the horizontal and straight sides of the door and window frame, and then locked on the outer edges of the support bars 21 and 22. The assembly operation is completed by the screw hole 23 (direct tapping). Although the aluminum L-shaped corner block 2 has sufficient supporting strength, the L-shaped cutting surface 24 is difficult to accurately cut into a fixed size, resulting in The forming dimension of the section 25 of the strips 21, 22 is prone to deviation, so that the aluminum L-shaped corner block 2 cannot be directly fitted into the horizontal and straight hollow slots of the entry window frame as the plastic L-shaped corner block 1 is used. Therefore, in order to avoid assembly troubles, in general mass production, the width dimension (ie, section 25) of the strips 21 and 22 of the aluminum L-shaped corner block 2 is designed to be smaller than the hollow groove of the door and window frame, and the joint angle is combined. The outer side edge of the L-shaped joint block 2 (ie, the outer side edge of the preset screw hole 23) abuts against the outer edge of the hollow frame of the door and window frame, and the inner green color is suspended in the hollow groove, but the L-shaped joint block 2 is The use mode is bound to fail to achieve the advantage that the plastic L-shaped corner block 1 can be fixed on the door and window frame before the screw is locked, and the door and window frame material is easy to be twisted on the L-shaped joint block, and the aluminum material is also used. The aluminum extruded hollow groove on the L-shaped joint block 2 is all located on the cutting surface 24, so that the joint gap of the 45-degree joint end of the door and window frame still penetrates the hollow groove and cannot be covered, so that the combined effect is affected. Appearance and closeness.

As shown in Fig. 3, the iron L-shaped joint block 3 is made of iron sheets, and the machining procedure is more troublesome than the aluminum L-shaped joint block 2, and the forming size is also more than that of the aluminum L-shaped joint block 2. It is difficult to control accurately, so the size and size of the design and use are the same as the aluminum L-shaped joint block 2, can not achieve the tight fit fit relationship such as the plastic L-shaped joint block 1, and the screw hole 31 must be punched into a hole After the tapping operation, the screw can be locked in, and the production of the L-shaped corner block 3 of the iron material is also increased.

For example, in the structural improvement of the aluminum sash frame described in the patent publication No. TW 529665, it is disclosed that a long straight frame is formed in a rectangular window frame at a 45 degree cut edge of any two opposite aluminum extruded rods. The hollow aluminum extruded block has a plurality of screws respectively inserted into the side of the aluminum extruded rod and the outside of the cut edge and locked into the aluminum extruded block to fix the adjacent two aluminum extruded rods. The lack of this method is that the aluminum extruded block is only a long straight structure, and does not have the important features of the L-shaped structure of the L-shaped joint blocks 1, 2, 3, etc., so that adjacent two The combination of the aluminum grooved rod does not have the 90 degree angle simple positioning function of the L-shaped joint block and the horizontal and straight mutual snapping function, so the combination of the straight elongated aluminum extruded block at the 45 degree joint end of the door and window frame Strength is not as conventional L-type connection The corner block, the combined operation is not as fast as the L-shaped joint block.

Because of the many drawbacks of the above-mentioned prior art, the inventors of the present invention have previously proposed an improved structure of the L-shaped joint block for use in the door and window frame as described in the TW 576475 patent, and the known TW M251008 patent case. The door and window are improved by the L-shaped joint body, and the technical contents disclosed by the two can replace the L-shaped joint block of the plastic or metal material of the prior art, and the assembly work and the promotion of the 45-degree joint can be simplified. The tightness of the joint angle and the bonding strength can also be used to easily cut a long aluminum extruded strip to form an L-shaped joint block, or die-cast into an L-shaped joint block by using a die-casting technique. In order to meet the mass production needs of the L-shaped joint block.

Nonetheless, the inventors have conceived the present invention in light of the above-mentioned shortcomings of the prior art and in order to solve the above-mentioned deficiencies of the prior art, through careful experimentation and research, in order to overcome the conventional knowledge. The shortcomings in technology.

The present invention has been made to solve the problems of the prior art as described above, and an object thereof is to provide an L-shaped corner joint device, whereby the structure not only improves the structural rigidity of the conventional joint block, but also improves the conventional joint angle. The problem of cumbersome block assembly, insufficient tightness, insufficient bonding strength, and insufficient appearance tightness is further due to the proposal of the present invention to solve at least some of the deficiencies of the prior art structure and to provide an alternative.

In order to achieve the above object, according to the present invention, an L-shaped corner joint device is assembled in a corner end of an aluminum door sash, comprising: a first member and a second member. The first piece is an aluminum extruded hollow member extending in the longitudinal direction, and is provided with at least one first engaging portion extending in the longitudinal direction thereof. The second member is an aluminum extruded hollow member extending in the longitudinal direction, and is provided with at least one second engaging portion extending in the longitudinal direction thereof. The first engaging portion of the first piece is engaged with the second engaging portion of the second piece, and the first piece and the second piece are combined into an L-shaped structure. The L-shaped angle device is locked in the hollow groove at the corner end of the aluminum door sash, and the first piece is horizontally inserted in the longitudinal direction thereof. The hollow groove of the transverse branch of the aluminum door and window frame, and the second piece is vertically inserted into the hollow groove of the straight branch of the aluminum door sash in the longitudinal direction thereof.

Wherein, the length direction of the first member on the L-shaped structure is parallel to the longitudinal direction of the second member.

In order to make the present invention more clear and detailed, the preferred embodiment and the following drawings are used to describe the structure and technical features of the present invention as follows: Please refer to FIG. 4, which is a 45 degree angle aluminum door and window. A three-dimensional diagram of the frame. The aluminum door sash 4 is assembled from the upper and lower horizontal supports 41 and the left and right straight supports 42. The horizontal support 41 and the straight support 42 are the same aluminum extruded frame, and the two ends are cut into 45 pieces. The cut edge 43 of the angle is such that the four joint ends of the aluminum door sash 4 are integrally joined at a 45 degree angle.

Please refer to FIG. 5 to FIG. 9 , which are an exploded view, a combined view, an un-clamped state diagram, a state diagram and a front view when the cross-arm is used in the first embodiment of the present invention. Schematic diagram of the section. The invention provides an L-shaped joint device which is assembled in the corner end of an aluminum door sash 4, and the L-shaped corner device 5 comprises a first piece 6 and a second piece 7.

The first piece 6 is integrally formed by an aluminum extrusion process, and is an aluminum extruded hollow member extending in a length direction, and the first member 6 is provided with at least one first engaging portion 61 extending in the longitudinal direction thereof. . The shape and size of the first piece 6 corresponds to the hollow groove 44 of the transverse leg 41 of the aluminum door sash 4 so that the first piece 6 can be nested into the hollow groove 44 of the transverse leg 41 of the aluminum door sash 4 with appropriate tightness. The first piece 6 further includes at least one hole 62 extending in the longitudinal direction thereof for screw locking. The hole 62 may be in the shape of an open or closed circular groove. In the present embodiment, the hole groove 62 It is shaped as an open C-shaped groove, and its opening can face the second piece 7, or it can face in the opposite direction.

The second member 7 is integrally formed by an aluminum extrusion process, and is an aluminum extruded hollow member extending in the longitudinal direction, and the second member 7 is provided with at least one second engaging portion 71 extending in the longitudinal direction thereof. The second engaging portion 71 is engaged with the first engaging portion 61 of the first member 6, so that the second member 7 and the first member 6 are combined. A 90 degree vertical L-shaped structure is synthesized, wherein the length of the second member 7 is less than or equal to the length of the first member 6. The length of the second member 7 corresponds to the hollow slot 44 of the straight leg 42 of the aluminum door sash 4 such that the second member 7 fits snugly into the hollow slot 44 of the straight leg 42 of the aluminum door sash 4. The second member 7 further includes at least one hole 72 extending in the longitudinal direction thereof for screw locking. The hole 72 can be shaped as an open or closed circular groove. In the present embodiment, the hole 72 is formed. It is shaped as an open C-slot with its opening facing the first piece 6 or in the opposite direction.

When the first member 6 and the second member 7 are combined into the above-described L-shaped structural body, the longitudinal direction of the first member 6 and the longitudinal direction of the second member 7 are parallel to each other.

Moreover, a first abutting portion 611 is formed on one edge of the first engaging portion 61 of the first member 6, and a second abutting is formed on one side of the second engaging portion 71 of the second member 7. When the first engaging portion 61 of the first member 6 and the second engaging portion 71 of the second member 7 are engaged with each other, the first abutting portion 611 is in contact with the second abutting portion 711. A snap-fit state is formed. In addition, the first abutting portion 611 and the second abutting portion 711 may be planar, convex or groove structures, respectively.

In the present embodiment, the L-shaped corner joint device 5 is used to be locked in the corner end of the aluminum door sash 4, and the first member 6 is horizontally fitted into the horizontal branch 41 of the aluminum door sash 4 in its longitudinal direction. The hollow groove 44 at the cut end of the angle is locked and the second piece 7 is vertically inserted into the hollow groove 44 of the 45 degree angle end of the adjacent straight branch 42 in its longitudinal direction and locked, and the first piece 6 and the first The two pieces 7 each have at least one hole groove 62, 72 as a locking connection with the assembled aluminum door sash 4, thereby achieving the use function of the L-shaped joint device of the present invention, thereby replacing the currently used plastic material or The L-shaped joint block of the metal material can simplify the 45-degree joint assembly operation of the door and window frame and improve the tightness and bonding strength of the 45-degree joint.

Furthermore, the first member 6 and the second member 7 are aluminum extruded hollow members extending in the longitudinal direction. Further, the first member 6 and the second member 7 respectively have at least one hollow groove 63, 73, which is hollow. The slot 63 can be closed or open The hollow hollow trough structure, as well as the hollow trough 73, may be a closed or open hollow trough structure.

Moreover, the first member 6 is further provided on its outer peripheral surface with a plurality of teeth 64 along its length to facilitate the first member 6 to fit into the hollow groove of the transverse branch 41 of the aluminum door sash 4 with appropriate tightness. Within 44. The second member 7 is further provided on each of its bottom portions with a chamfer 74 to facilitate insertion of the second member 7 into the hollow groove 44 of the straight leg 42 of the aluminum door sash 4. The second member 7 is further provided on its outer peripheral surface with a plurality of rows of teeth along its length to facilitate the fitting of the second member 7 into the hollow groove 44 of the straight leg 42 of the aluminum door sash 4 with appropriate tightness.

During assembly, the angled ends of the adjacent transverse legs 41 and the straight supports 42 in the aluminum door sash 4 are cut into 45 angled edges 43, and the L-shaped angle joint device 5 is placed in the corner end of the aluminum door sash 4 The first member 6 of the L-shaped angle device 5 is laterally inserted into the hollow groove 44 at the end of the trimming edge 43 of the transverse branch 41, and the second member 7 is stopped at the outer edge of the opening of the hollow groove 44 of the transverse branch 41 and positioned. Then, the screw 8 is inserted through the predetermined through hole 411 on the outer side of the lateral support 41 and screwed through the outer edge of the first member 6. The screw 8 can be screwed directly through the outer edge of the cross member 41. A perforation (not shown) corresponding to the through hole 411 of the transverse branch 41 may be firstly screwed on the outer edge of the first member 6, so that the screw 8 can be tapped and screwed in and assembled quickly; and the second member 7 is vertically embedded adjacent to each other. The straight leg 42 is cut into the hollow groove 44 at the end of the 43 side. At this time, the transverse angle 41 and the 45-corner trim 43 on the straight branch 42 can be closely connected to form a 45 degree joint manner, and then the screw 8 is passed through the outer side of the straight branch 42. The preset through hole 421 is inserted into the hole groove 62 of the first piece 6 and the hole groove 72 of the second piece 7 to be locked, that is, the assembly work of a 45 degree joint is completed. By the L-shaped structure of the L-shaped joint device 5 of the present invention, the four joint ends of the aluminum door sash 4 are integrally joined at a 45-degree angle, as shown in FIG. 10, which is sufficient to simplify the 45-degree joint. The assembly work can also improve the tightness and bonding strength of the 45 degree joint.

Moreover, in the above assembly work, the screw 8 is passed through the predetermined through hole 411 on the outer side of the lateral support 41 and screwed through the outer edge of the first member 6 of the L-shaped angle device 5 to make the L-shaped connection The corner device 5 is locked with the transverse branch 41 of the aluminum door sash 4 Integral, wherein the perforations 411 on the outer side of the transverse branch 41 can be used with the scissor-type push-open structure used for the aluminum door sash 4 (for pushing the window) (not shown, generally arranged in the upper and lower transverse branches) The setting holes of the upper and lower edges of the 41 are shared to reduce the number of the perforations 411 and the locking screws 8, and the brackets of the scissor-type pushing structure are locked together, which can relatively increase the locking strength and stability; The length of the first member 6 of the angle-connecting device 5 can be lengthened as needed, so that the first member 6 can be shuttled into the transverse branch 41 to form an inner and outer casing, and the aluminum door sash 4 can be added (for pushing the window). Rigid and not easily deformed.

Moreover, in terms of assembly work and manufacturing cost of the aluminum door sash 4, the process or cost of using the L-shaped joint block directly affects the use efficiency, and the L-shaped angle device 5 of the present invention utilizes aluminum material. The aluminum extruded hollow member made by the integral molding process can be easily formed by the existing equipment and technology. As shown in Figs. 11 and 12, a long aluminum extruded type material can be produced by aluminum extrusion molding technology. 100, 200, and the structure of the aluminum extruded type material 100, 200 is the same as that of the first piece 6 and the second piece 7, respectively, and then the long aluminum extruded type materials 100, 200 are cut out one by one in the longitudinal direction. A first piece 6 and a second piece 7 are combined with the first piece 6 and the second piece 7, that is, the production of an L-shaped corner device 5 is simply completed. In addition, if the aluminum door sash 4 is used in a relatively large amount, the first piece 6 and the second piece 7 which are matched may also be respectively formed with a die for die-casting, and the first piece is die-cast by an aluminum die-casting process. 6 and the second piece 7 to meet the mass production requirements of the L-shaped joint device 5.

Referring to FIG. 13, a front cross-sectional view of FIG. 6 in the first embodiment of the present invention, wherein the first member 6 further includes two first leg portions 65, and the two first leg portions 65 are from the first member. The left and right sides of the protrusion 6 are formed in the direction of the second member 7, and each of the first leg portions 65 is provided with the first engaging portion 61. The second member 7 further includes two second leg portions 75 protruding from the left and right sides of the second member 7 and formed toward the first member 6 , and each of the second leg portions 75 is disposed. There is a second first engaging portion 71 as described. After the first piece 6 is combined with the second piece 7, the first leg portions 65 of the first piece 6 are located in the second piece 7 The inside of the two second leg portions 75. The first abutting portion 611 of the first engaging portion 61 of the first piece 6 is a convex body, and the second abutting portion 711 of the second engaging portion 71 of the second piece 7 is a convex body.

Referring to FIG. 14, a schematic cross-sectional view of a second embodiment of the present invention is substantially the same as that of the first embodiment, except that the first leg portions 65 of the first member 6 are located at the same time. The outer side of the second leg portion 75 of the two pieces 7 of the two.

Please refer to FIG. 15 , which is a schematic cross-sectional view of a third embodiment of the present invention, which is substantially the same as that of the first embodiment, and is a further extension of the content of the second embodiment, that is, the first piece 6 The first engaging portion 61 is formed into a T shape, and the second engaging portion 71 of the second member 7 is formed into an L shape.

Referring to FIG. 16, a schematic cross-sectional view of a sixth embodiment of the present invention is substantially the same as that of the first embodiment, and the difference is that one of the two first leg portions 65 of the first member 6 is The first leg portion 65 is located inside one of the second leg portions 75 of the second member 7, and the other first leg portion 65 is located outside the other second leg portion 75 of the second member 7.

Referring to FIG. 17, a schematic cross-sectional view of a fourth embodiment of the present invention is substantially the same as that of the first embodiment, and the difference is that the first slot 6 of the first member 6 is used as the first The engaging portion 61 has the first abutting portion 611 as a convex body. Thus, the second abutting portion 711 of the second engaging portion 71 is formed into a groove by the second abutting portion 711 to make the first engaging portion. The first abutting portion 611 of the portion 61 and the second abutting portion 711 of the second engaging portion 71 are combined in a male-female manner. In addition, one of the holes 72 of the second member 7 can be used as the second engaging portion 71, so that the second abutting portion 711 is convex, so that the first member 6 has a first engaging portion. The first abutting portion 611 of the first engaging portion 71 is combined with the first abutting portion 611 of the first engaging portion 61 in a male-female manner. Show).

Referring to FIG. 18, it is a schematic cross-sectional view of a fifth embodiment of the present invention, which is substantially the same as the first embodiment and is fourth. A further extension of the embodiment, that is, the two holes 62 on the first member 6 are used as the two first engaging portions 61, so that the first abutting portion 611 is a convex body, so that the second member 7 is The two second abutting portions 711 of the second engaging portions 71 are formed into a groove, so that the first abutting portion 611 of the first engaging portion 61 and the second abutting portion 711 of the second engaging portion 72 are formed into a common The combination of the female cooperation methods.

Referring to FIG. 19, a schematic cross-sectional view of a seventh embodiment of the present invention is substantially the same as that of the first embodiment, except that at least one slot 62 of the first member 6 is at least one. The first engaging portion 61, and the at least one slot 72 of the second member 7 serves as at least one second engaging portion 71, wherein the opening of the slot 62 of the first member 6 and the slot 72 of the second member 7 The openings are opposite, and further, a long straight connecting member 9 is simultaneously inserted into the hole groove 62 of the first member 6 and the hole groove 72 of the second member 7 to form a snap-fit state.

The above is only the preferred embodiments of the present invention, and is intended to be illustrative, and not restrictive, and it is understood by those of ordinary skill in the art that Many changes, modifications, and even equivalents may be made without departing from the scope of the invention.

1‧‧‧L type joint block

11, 12 ‧ ‧ strips

13‧‧‧ screws

14‧‧‧section

2‧‧‧L type joint block

21, 22 ‧ ‧ strips

23‧‧‧ screw holes

24‧‧‧cut surface

25‧‧‧section

3‧‧‧L type joint block

31‧‧‧ screw holes

4‧‧‧Aluminum door sash

41‧‧‧cross

411‧‧‧Perforation

42‧‧‧ straight support

421‧‧‧Perforation

43‧‧‧ trimming

44‧‧‧ hollow slots

5‧‧‧L type angle joint device

6‧‧‧ first piece

61‧‧‧First engagement department

611‧‧‧First Abutment

62‧‧‧ hole slot

63‧‧‧ hollow slots

64‧‧‧ teeth

65‧‧‧First foot

7‧‧‧ second

71‧‧‧Second engagement department

711‧‧‧second abutment

72‧‧‧ hole slot

73‧‧‧ hollow slots

74‧‧‧Chamfering

75‧‧‧Second foot

8‧‧‧ screws

9‧‧‧Connecting parts

100,200‧‧‧Aluminum extruded element

FIG. 1 is a schematic perspective view of a conventional plastic L-shaped joint block.

2 is a schematic perspective view of an aluminum extruded L-shaped joint block.

3 is a schematic perspective view of a conventional L-shaped corner block of iron sheets.

Figure 4 is a perspective view of a 45 degree angle aluminum door sash.

Figure 5 is an exploded perspective view of the L-shaped cornering device of the first embodiment of the present invention.

Figure 6 is a combined perspective view of Figure 5.

Fig. 7 is a schematic view showing the state in which the L-shaped corner device of the first embodiment of the present invention is not fitted to the aluminum door sash.

Fig. 8 is a schematic view showing the use state of the L-shaped joint device of the first embodiment of the present invention which is fitted to the transverse branch of the aluminum door and window frame.

Figure 9 is a schematic cross-sectional view showing one of the combinations in Figure 8.

Figure 10 is a front elevational view showing the use of the L-shaped corner device of the first embodiment of the present invention on a 45 degree angle aluminum door sash.

Figure 11 is a perspective view showing the aluminum extruded type of the first member in the L-shaped joint device of the first embodiment of the present invention.

Fig. 12 is a perspective view showing the aluminum extruded type member for the second member in the L-shaped joint device of the first embodiment of the present invention.

Figure 13 is a right side cross-sectional view of Figure 6.

Figure 14 is a right side sectional view showing an L-shaped corner jointing device according to a second embodiment of the present invention.

Figure 15 is a right side sectional view showing an L-shaped cornering device of a third embodiment of the present invention.

Figure 16 is a right side sectional view showing an L-shaped corner jointing device of a fourth embodiment of the present invention.

Figure 17 is a right side sectional view showing an L-shaped corner jointing device according to a fifth embodiment of the present invention.

Figure 18 is a right side sectional view showing an L-shaped cornering device of a sixth embodiment of the present invention.

Figure 19 is a right side sectional view showing an L-shaped corner jointing device of a seventh embodiment of the present invention.

5‧‧‧L type angle joint device

6‧‧‧ first piece

61‧‧‧First engagement department

611‧‧‧First Abutment

62‧‧‧ hole slot

63‧‧‧ hollow slots

64‧‧‧ teeth

65‧‧‧First foot

7‧‧‧ second

71‧‧‧Second engagement department

711‧‧‧second abutment

72‧‧‧ hole slot

73‧‧‧ hollow slots

74‧‧‧Chamfering

75‧‧‧Second foot

Claims (10)

An L-shaped joint device is assembled in a hollow groove at an angular end of an aluminum door sash, comprising: a first piece, which is an aluminum extruded hollow member extending in a length direction, the first piece being provided with at least a first engaging portion extending in a longitudinal direction thereof, and at least one hole extending in a longitudinal direction thereof for screwing; and a second member being an aluminum extruded hollow member extending in a longitudinal direction, The second member is provided with at least one second engaging portion extending in the longitudinal direction thereof, and at least one slot extending in the longitudinal direction thereof for screw locking, the second engaging portion being coupled to the first member The first engaging portion is correspondingly engaged to combine the second member and the first member into an L-shaped structural body; wherein the length direction of the first member on the L-shaped structural body is the length of the second member The directions are parallel to each other; wherein the L-shaped angle device is locked in the corner end of the aluminum door sash, and the first piece is horizontally inserted into the hollow slot of the transverse branch of the aluminum door sash in the longitudinal direction thereof, and the The second piece is vertically inserted into the hollow groove of the straight branch of the aluminum door sash in the longitudinal direction thereof. The L-shaped joint device according to claim 1, wherein the shape and size of the first member correspond to a hollow groove of a transverse branch of the aluminum door sash, and the length of the second member corresponds to the aluminum door sash The straight groove of the straight support, and when assembled, the first piece can be fitted into the hollow groove of the transverse branch of the aluminum door and window frame with appropriate tightness. The L-shaped corner device of claim 1, wherein the first member is further provided on its outer peripheral surface with a plurality of rows of teeth along its length; the second member is further disposed on both sides of the lower edge thereof. Chamfered. The L-shaped corner joint device of claim 1, wherein the first engaging portion of the first member and the second engaging portion of the second member are combined in a male-female manner. The L-shaped corner device of claim 1, wherein the first piece further comprises There are two first leg portions, and the two first leg portions are protruded from the left and right sides of the first member and are formed toward the second member, and each of the first leg portions is provided with the first engaging portion; The second member further includes two second leg portions protruding from the left and right sides of the second member and formed toward the first member, and each second leg portion is provided with the second leg portion Engagement department. The L-shaped corner device of claim 5, wherein the relative positions of the first leg portions of the first member and the second leg portions of the second member are selected from the two of the first members. The first leg portion is located outside the second leg portions of the second member, and the first leg portions of the first member are located inside the second leg portions of the second member, or the first member One of the first leg portions is located inside one of the second leg portions of the second member, and the other first leg portion is located outside the other second leg portion of the second member. The L-shaped corner device of claim 1, wherein the at least one slot on the first member serves as the at least one first engaging portion for the at least one second card on the second member The joint is engaged. The L-shaped corner joint device of claim 1, wherein the at least one hole groove on the first piece serves as the at least one first engaging portion, and the at least one hole groove on the second piece serves as the at least one a second engaging portion, wherein the opening of the first slot of the first member is opposite to the opening of the slot of the second member, and penetrates the slot of the first member and the second portion by using a long straight connecting member The holes of the pieces are formed to form a snap. The L-shaped joint device of claim 1, wherein the first piece and the second piece are respectively cut into a predetermined length of the aluminum extruded hollow member by using an aluminum extruded frame material, and the length of the second piece is Less than or equal to the length of the first piece. The L-shaped corner joint device of claim 1, wherein a first abutting portion is formed on one side of the first engaging portion of the first member, and a second engaging portion of the second member is formed. a second abutting portion is formed on the side edge, and when the first engaging portion of the first member is engaged with the second engaging portion of the second member, the first abutting portion is coupled to the second abutting portion The connecting portion is in contact with each other, wherein the first abutting portion and the second abutting portion may be a planar, convex or concave structure.