JP7228062B1 - Door window corner wall crack prevention assembly structure and its crack prevention member - Google Patents

Abstract

An object of the present invention is to provide an assembly structure for preventing cracks in a door window corner wall surface, which allows reinforcement to be easily arranged along a window frame or a door frame, and improves on-site construction efficiency. A door window corner wall crack prevention assembly structure includes a plurality of crack prevention members 1, a plurality of fixing rods 2, and at least one positioning rod 3. The crack prevention member 1 has a first sheet part 11 arranged in a vertical direction and a second seat part 12 arranged in a horizontal direction, which are provided at intervals in correspondence with each other, The first seat part 11 and the second seat part 12 are vertically connected and integrally molded. A notch 13 is formed on one side of the first seat part 11 and the second seat part 12 together. The fixing rods 2 are inserted into two corresponding fixing holes 14 in the first seat part 11 and the second seat part 12 of the crack prevention member 1, respectively. [Selection diagram] Figure 1

Description

TECHNICAL FIELD The present invention relates to a building member, and more particularly to a door window corner wall crack prevention assembly structure and its crack prevention member.

When the building expands and shrinks due to heat or shakes due to an earthquake, cracks may occur in the corners of the window frames, and rainwater may enter the room through the cracks. In view of this drawback, the present inventor invented a "window angle structure wall crack prevention member" (Patent Document 1). As shown in FIG. 6, the "window angle structure wall surface crack prevention member (a)" of Patent Document 1 includes a first sheet portion a1 integrally formed with each other and a second sheet portion a1 vertically connected to the first sheet portion a1. 2 seat parts a2, the first seat part a1 and the second seat part a2 have a plurality of holes a3, and after the positioning rod a4 is inserted into the hole a3, the window corner structure wall crack The prevention member a is nailed to a form provided at the corner of the window frame, concrete is poured into the window corner structure wall surface crack prevention member a is installed in the wall, and when an earthquake occurs, the window frame is installed. Cracks were prevented from occurring in the wall due to the stress generated on the wall surface at the corner of the wall.

However, when actually using the "window angle structure wall crack prevention member" of Patent Document 1, the present inventors have taken into account the drawback that when the positioning rod a4 is nailed to the formwork, it will come off due to vibration. daughter invented the "window corner wall crack prevention assembly fixing structure" of Patent Document 2.
As shown in FIG. 7, the fixing structure b for the window corner wall crack prevention assembly mainly includes a plurality of positioning rods b2 detachably inserted into the crack prevention member b1, and the plurality of positioning rods b2 are bound by a band b3. Since the positioning rods b2 are bound and fixed by the band b3, the positioning rods b2 are prevented from falling unexpectedly during installation, and the worker can easily nail each positioning rod b2 into the formwork. can be stopped.

When actually using the "window corner structure wall crack prevention member" of Patent Document 1 and the "window corner wall crack prevention assembly fixing structure" of Patent Document 2, as shown in FIG. After fixing to, when arranging the vertical reinforcing bars c along the periphery of the window frame, first, the worker climbs to a high place with a ladder or the like, and then fills the gap formed by the two fixing bars b4 In order to insert the vertical reinforcing bar c from top to bottom, the worker had to climb up and down a ladder or the like while holding the reinforcing bar c by hand. Therefore, the process of inserting and arranging a plurality of reinforcing bars c from the top to the bottom takes a lot of time and effort, and the construction efficiency at the site is low. Therefore, in view of this problem, the present inventor invented the "Door Window Corner Wall Crack Prevention Assembly Structure" of Patent Document 3.

In Patent Document 3, as shown in FIG. 9, a crack prevention member d1 of a door window corner wall surface crack prevention assembly structure d has a notch at a portion where a first sheet portion d11 and a second sheet portion d12 are connected. d13 is formed, and the edges of the end portions of the first sheet portion d11 and the second sheet portion d12 are formed with two adjacent fixing holes d14 formed laterally of the notch d13, and the two fixing holes d14 are formed. A fixing rod d2 is inserted into each of d14. A positioning hole d15 is formed in a work zone d3 jointly defined by two fixing rods d2 inserted into the first seat portion d11 and the second seat portion d12, and a positioning rod d4 is inserted into the positioning hole d15. It is movably inserted and fixed on the formwork.

Also refer to FIG. As shown in FIG. 10, when the door window corner wall surface crack prevention assembly structure d is attached to the frame corner of the door frame/window frame e and reinforcing bars f are arranged around the door frame/window frame e, the reinforcing bars f are placed in the second order. Because the reinforcement can be directly arranged on the outer sides of the first sheet portion d11 and the second sheet portion d12 and the reinforcement section d5 formed between the fixed rods d2 adjacent to each other, and can be brought into contact with the fixed rods d2. , the reinforcing bars f can be arranged quickly and easily, and the construction efficiency at the site can be greatly improved.

Further, in the "door window corner wall surface crack prevention assembly structure" of Patent Document 3 and the "window corner wall surface crack prevention assembly fixing structure" of Patent Document 2, the positioning rod b2 is bound by the band b3, so that the positioning rod b2 unexpectedly falls. However, it took a lot of construction time and cost to bind and fix the plurality of positioning rods b2 with the band b3. invented "Door Window Corner Wall Crack Prevention Assembly Structure (6)".

In Patent Document 4, as shown in FIG. 11, the door window corner wall surface crack prevention assembly structure g includes a rod wall of a positioning rod g3 inserted into a plurality of positioning holes g2 of a crack prevention member g1 and a positioning hole g2. Since the hole wall abuts on the positioning rod g3, when the positioning rod g3 is sequentially nailed to the mold, the positioning rod g3 that has not yet been driven into the mold is securely fixed onto the crack preventing member g1. As a result, it is possible to prevent the positioning rods from falling off due to vibration, and it is also possible to easily attach the positioning rods b2.

After installing the "door window corner wall crack prevention assembly structure" of Patent Document 3, the wall structure at the corner of the door frame and window frame and the coating layer on the surface are subjected to the action of seismic stress, etc., and small cracks occur. something happened. As shown in FIG. 12, the "door window corner wall surface crack prevention assembly structure (7)" of Patent Document 5 includes a door window corner wall surface crack prevention assembly structure h comprising a plurality of crack prevention members h1 provided at intervals. , two rigid sheets h31 of the rigid unit h3 are connected to both ends of the fixed rod h2, a vibration absorbing member h32 is provided between the two rigid sheets h31, and a plurality of vibration absorbing members h32 are provided. Since the notch of the crack prevention member h1 is hung sideways and the reinforcement unit h3 is installed, the tensile strength of the wall structure at the corner of the door frame / window frame is high, and the wall structure and Prevent small cracks in the coating layer on its surface.

After installing the "door window corner wall crack prevention assembly structure" of Patent Document 3, as shown in FIG. The door frame/window frame j was attached to the door/window, and the gap formed between the door/window and the door/window was filled with mortar to form the slit k. As a result, small cracks may occur in the slit k and the coating layer on the surface thereof. Therefore, in view of such shortcomings, the present inventor invented the "Door Window Corner Wall Crack Prevention Assembly Structure (8)" of Patent Document 6.

As shown in FIG. 14, in the door window corner wall surface crack prevention assembly structure m of Patent Document 6, a plurality of crack prevention members m1 provided at intervals are fitted with fixing rods m2, and two rigid units m3 are provided. Two rigid sheets m31 are connected to both ends of the fixed rod m2, a vibration absorbing member m32 is provided between the two rigid sheets m31, and a slit rigid portion m33 is formed in each of the two rigid sheets m31. As shown in FIG. 15, when the door window corner wall surface crack prevention assembly structure m is installed and used, its slit stiffening part m33 is combined with the slit k at the corner of the door frame/window frame j, and the slit of the stiffening unit m3 By installing the strong part m33, the tensile strength of the wall structure i and the slit k at the corner of the door frame/window frame j is increased, and the slit k and the coating layer at the corner of the door frame/window frame j are damaged by an earthquake or the like. Prevent small cracks from forming.

As can be seen from the research and development process described above, the present inventor actually uses the product, finds points that can be improved, makes improvements, and makes efforts to make the product easier to use and practical. I've been In addition, crack prevention members such as Patent Document 7 and Patent Document 8 filed based on Patent Documents 3 to 6 and Patent Documents 3 to 6 conduct and disperse stress by uneven bending portions formed on the surface. However, the efficiency of stress transmission and dispersion is not favorable, and there are drawbacks such as the generation of shear force of 45 degrees at the corners of the wall structure of door frames and window frames, which causes cracks. , is still not ideal. In view of such a situation, the present inventor has completed the present invention as a result of earnest research.

Taiwan Patent No. I650468 Taiwan Utility Model Registration No. M582057 Taiwan Patent No. I695106 Taiwan Utility Model Registration No. M594053 Taiwan Patent No. I708882 Japanese Patent No. 6828196 Chinese Utility Model Registration No. CN211775119U

An object of the present invention is to provide a plurality of arc-shaped convex ribs and concave grooves parallel to each other on the surface of the crack prevention member, so that the stress can be quickly conducted and dispersed, and the corners of the wall structure of the door frame and window frame To provide a door window corner wall surface crack prevention assembly structure and its crack prevention member that prevent cracks from being generated due to a shear force of 45 degrees.

To solve the above problems, according to a first aspect of the present invention, there is provided a door window corner wall crack prevention assembly structure comprising a plurality of crack prevention members, a plurality of fixing rods and at least one positioning rod. The crack prevention member includes a first sheet portion arranged vertically and a second sheet portion arranged horizontally, which are provided correspondingly and spaced apart from each other. wherein the first seat portion and the second seat portion are vertically connected and integrally formed, and one side of the first seat portion and the second seat portion are jointly formed with a notch. at least two fixing holes adjacent to each other are formed in the side portions of the cutouts of the end edges of the first sheet portion and the second sheet portion, and the fixing rod is formed in the crack The first seat portion and the second seat portion of the prevention member are respectively inserted into the corresponding two fixing holes, and the first seat portion has two fixing rods vertically oriented. Two vertical side lines are formed to pass through, two horizontal side lines are formed in the second sheet portion to pass horizontally through the two fixing bars, and two vertical side lines are formed. A line and two of said transverse edge lines together with said end edges of said first sheet part and said second sheet part jointly encircle to form a working zone, said working zone having at least one locating hole. The positioning rods are respectively inserted into the corresponding positioning holes of the crack prevention member and fixed on the formwork, and the surface of the crack prevention member has a plurality of convex ribs spaced apart. between two convex ribs adjacent to each other, grooves are respectively provided, and the plurality of convex ribs and the plurality of concave grooves are arc-shaped and provided parallel to each other. , providing a door window corner wall crack prevention assembly structure.

In order to solve the above problems, according to a second aspect of the present invention, there is provided a crack prevention member of a door window corner wall crack prevention assembly structure, wherein the crack prevention member comprises a first and a second seat portion disposed laterally, wherein the first seat portion and the second seat portion are vertically connected and integrally formed to form the first seat A notch is jointly formed on one side of the part and the second sheet part, and a plurality of convex ribs are provided on the surface of the crack prevention member at intervals, and two of the convex ribs adjacent to each other are provided on the surface of the crack prevention member. Crack prevention of door window corner wall crack prevention assembly structure, characterized in that grooves are respectively provided between the ribs, and the plurality of convex ribs and the plurality of grooves are arc-shaped and parallel to each other. provide parts.

The door window corner wall crack prevention assembly structure and its crack prevention member of the present invention are provided on the surface of the crack prevention member when the reinforced concrete wall is subjected to the action of external force and stress is generated in the corners of the door frame and window frame. These stresses are guided by arc-shaped convex ribs and arc-shaped concave grooves, changing the transmission direction of the force at the stress end, quickly conducting and dispersing it to the peripheral side, and improving the wall structure of door frames and window frames. It is possible to prevent the generation of cracks due to the generation of a shear force of 45 degrees at the corners.

1 is an exploded perspective view showing a door window corner wall crack prevention assembly structure and a crack prevention member thereof according to an embodiment of the present invention; FIG. 1 is a front view of a door window corner wall crack prevention assembly structure and its crack prevention member according to an embodiment of the present invention; FIG. FIG. 3 is an explanatory view of the usage state when the door window corner wall crack prevention assembly structure and its crack prevention member according to one embodiment of the present invention are mounted on the door frame and the window frame; 1 is a perspective view of a door window corner wall crack prevention assembly structure and its crack prevention member according to an embodiment of the present invention in use when attaching to a reinforcing bar; FIG. FIG. 4 is an explanatory diagram of the structure of the door window corner wall crack prevention assembly according to the embodiment of the present invention and the state of transmitting and dispersing the stress generated in the crack prevention member thereof; FIG. 2 is a perspective view showing a conventional wall surface crack prevention member with a window angle structure; 1 is a perspective view of a conventional window corner wall crack prevention assembly fixing structure; FIG. FIG. 2 is an explanatory diagram of the state of use when the conventional window corner wall surface crack prevention assembly fixing structure is attached to a reinforcing bar; 1 is an exploded perspective view of a conventional door window corner wall crack prevention assembly structure; FIG. 1 is a perspective view of a conventional door window corner wall crack prevention assembly structure in use when attached to a reinforcing bar; FIG. 1 is a perspective view of another conventional door window corner wall crack prevention assembly structure; FIG. 1 is a perspective view of another conventional door window corner wall crack prevention assembly structure; FIG. FIG. 10 is an explanatory diagram of a state in which a crack has occurred in a corner wall surface of a conventional door frame/window frame; 1 is a perspective view of another conventional door window corner wall crack prevention assembly structure; FIG. FIG. 3 is an explanatory view of another conventional door window corner wall crack prevention assembly structure installation state;

First, refer to FIG. As shown in FIG. 1, the door window corner wall crack prevention assembly structure according to one embodiment of the present invention comprises at least a plurality of crack prevention members 1, a plurality of fixing rods 2 and at least one positioning rod 3. It consists of

The plurality of crack prevention members 1 are provided at intervals corresponding to each other, and have a first sheet portion 11 arranged vertically and a second sheet portion 12 arranged horizontally. have. The first seat portion 11 and the second seat portion 12 are vertically connected and integrally molded in an L shape, and one side of the first seat portion 11 and the second seat portion 12 has a right-angled seat portion. A notch 13 is formed jointly, and at least two fixing holes 14 adjacent to each other are formed on the sides of the notch 13 of the end edges 111 and 121 of the first sheet portion 11 and the second sheet portion 12 . , this fixing hole 14 is located at a corner beside the notch 13 .

The plurality of fixing rods 2 are respectively inserted into the two corresponding fixing holes 14 of the first seat portion 11 and the second seat portion 12 of the plurality of crack prevention members 1, and the first seat portion 11 has , two fixing holes 14 and two imaginary vertical side lines 151 vertically passing through the fixing rods 2 inserted therein are formed. And two imaginary lateral side lines 152 passing laterally through the fixed rod 2 inserted therein are formed. the two longitudinal side lines 151 and the two transverse side lines 152 together with the end edges 111, 121 of the first seat part 11 and the second seat part 12 encircle together to form the working zone 16; The working section 16 has at least one positioning hole 17 .

At least one positioning bar 3 is inserted into corresponding positioning holes 17 of the plurality of anti-crack members 1 . The positioning bar 3 is an iron nail, and both ends of the positioning bar 3 are provided with sharp ends 31 and stopper ends 32, respectively. In the door window corner wall crack prevention assembly structure according to the present embodiment, the working section 16 of the crack prevention member 1 is formed with a plurality of positioning holes 17 and at least one fixing hole 14 , and the working section 16 of the plurality of crack prevention members 1 is formed with a plurality of positioning holes 17 and at least one fixing hole 14 . The positioning rods 3 are respectively inserted into the corresponding positioning holes 17, the rod walls of the positioning rods 3 contact the hole walls of the positioning holes 17, and the working sections 16 of the plurality of anti-crack members 1 are correspondingly fixed. The fixing rod 2 is inserted into the hole 14 .

Also refer to FIG. As shown in FIG. 2 , a plurality of convex ribs 18 are provided at intervals on the surface of the crack prevention member 1 , and grooves 19 are respectively provided between two adjacent convex ribs 18 to prevent cracks. A plurality of convex ribs 18 and a plurality of concave grooves 19 provided on the surface of the prevention member 1 are arc-shaped and parallel to each other. The plurality of convex ribs 18 and the plurality of concave grooves 19 of the crack prevention member 1 are arranged concentrically and exhibit an arc shape whose diameter gradually increases outward from the center thereof. A reinforcing recess 181 is provided, and a plurality of through holes 191 are formed in the longitudinal direction of the recessed groove 19 .

Also refer to FIG. As shown in FIG. 3, when the door window corner wall surface crack prevention assembly structure of the present embodiment is installed outside the frame corner of the door frame 41 or the window frame 42 in actual use, the crack prevention member 1 of the present embodiment is The notch 13 corresponds to the frame corner position of the door frame 41 and window frame 42 . One end of the fixed rod 2 is brought into contact with the formwork, the sharp ends 31 of the plurality of positioning rods 3 are inserted into the formwork, and an operator holds an impact tool such as a hammer by hand to move the stopper end of the positioning rod 3. 32 are driven in sequence, and the sharp end 31 of the positioning rod 3 is driven into the mold and fixed. Then, according to the present invention, since the wall of the positioning rod 3 abuts against the wall of the positioning hole 17, the positioning rod 3 inserted into the positioning hole 17 is maintained and the other positioning rods 3 are struck and fixed. It can prevent it from falling off due to occasional vibrations. Therefore, the present invention can be easily installed.

When the door window corner wall crack prevention assembly structure of this embodiment is nailed onto the formwork and fixed to the frame corners of the door frame 41 and the window frame 42, the door frame 41 and the window frame 42 are formed as shown in FIG. A plurality of reinforcing bars 5 are arranged vertically and horizontally around it.
During actual construction, the vertical reinforcing bars 51 and the horizontal reinforcing bars 52 are attached to the fixing rods 2 adjacent to each other from the outer sides 112 and 122 of the first sheet portion 11 and the second sheet portion 12 of the crack prevention member 1 . The reinforcement is directly arranged in the reinforcement section 21 formed between and. Then, since the vertical reinforcing bars 51 and the horizontal reinforcing bars 52 are brought into contact with the fixing rod 2, the reinforcing bars 5 can be easily arranged. Therefore, there is no need for a worker to climb up and down a high place with a ladder or the like unlike the conventional technology, and the trouble of inserting the reinforcing bars 5 from above to the bottom is eliminated, and the crossing point of the vertical reinforcing bars 51 and the horizontal reinforcing bars 52 is eliminated. can be bound with a wire to fix a plurality of reinforcing bars 5.

After that, when ready-mixed concrete is poured into the space surrounded by the formwork, the liquid concrete flows through the plurality of through holes 191 of the crack prevention member 1 and flows between the plurality of crack prevention members 1 . Increase the fluidity of the concrete moving on the surface of the crack prevention member 1 through the plurality of convex ribs 18 and grooves 19 provided on the surface of the crack prevention member 1, reduce the dead angle of contact with the crack prevention member 1, and make each crack prevention member The surface of 1 is completely covered. When the surface of the crack prevention member 1 is covered with concrete, the plurality of reinforcing recesses 181 formed on the surface of the crack prevention member 1 are filled with concrete and attached. In this way, when the concrete is solidified and the wall structure is formed, the wall structure is formed with a plurality of projecting columns that are incorporated corresponding to the reinforcing recesses 181 of the crack prevention member 1, and the cracks of the present invention are formed. The bonding area and bonding stability between the prevention member 1 and the wall structure can be greatly increased. Therefore, it is possible to prevent the crack prevention member 1 of the present invention from being displaced or separated by the wall structure.

In this way, even if the reinforced concrete (RC) wall is subjected to external forces such as shaking due to an earthquake or expansion and contraction due to heat, and stress is generated on the wall surfaces at the corners of the door frame 41 and window frame 42, the door frame 41. Since the wall structure at the corner of the window frame 42 is securely connected to the crack prevention member 1, the strength and tensile strength of the wall structure are greatly improved, and the wall structure is securely connected. Therefore, the stress acting on the wall structure is absorbed, and at this time, as shown in FIG. 18 and grooves 19, change the transmission direction of the force at the stress end, quickly disperse toward the circumferential side of the crack prevention member 1, and the stress is absorbed by the crack prevention member 1, so that the crack prevention member 1 can be prevented from being bent or deformed, and cracks due to shear force of 45 degrees occurring in the corners of the wall structure of the door frame 41 and window frame 42 can be prevented. - It is possible to prevent the wall structure at the corner of the window frame 42 and the coating layer on the surface from cracking.

<The present invention>
1 crack prevention member 2 fixing rod 3 positioning rod 5 reinforcing bar 11 first sheet portion 12 second sheet portion 13 notch 14 fixing hole 16 working section 17 positioning hole 18 convex rib 19 concave groove 21 bar arrangement section 31 pointed end 32 Stopper edge 41 Door frame 42 Window frame 51 Vertical reinforcing bar 52 Horizontal reinforcing bar 111 End edge 112 Outer side 121 End edge 122 Outer side 151 Vertical side line 152 Horizontal side line 181 Reinforcement concave portion 191 Through hole <Prior art>
a Window corner structure wall crack prevention member a1 First seat part a2 Second seat part a3 Hole a4 Positioning bar b Window corner wall crack prevention assembly fixing structure b1 Crack prevention member b2 Positioning bar b3 Band b4 Fixing bar c Vertical reinforcing bar d Door window corner wall crack prevention assembly structure d1 Crack prevention member d2 Fixing rod d3 Work space d4 Positioning rod d5 Reinforcement section d11 First seat part d12 Second seat part d13 Notch d14 Fixing hole d15 Positioning hole e Window frame f reinforcing bar g Door window corner wall crack prevention assembly structure g1 Crack prevention member g2 Positioning hole g3 Positioning bar h Door window corner wall crack prevention assembly structure h1 Crack prevention member h2 Fixing rod h3 Reinforcement unit h31 Reinforcement sheet h32 Vibration absorption member i Wall structure Body j Window frame k Slit m Door window corner wall crack prevention assembly structure m1 Crack prevention member m2 Fixing rod m3 Reinforcement unit m31 Reinforcement sheet m32 Vibration absorption member m33 Slit reinforcement part

Claims (7)

A door window corner wall crack prevention assembly structure comprising a plurality of crack prevention members, a plurality of fixing rods and at least one positioning rod, comprising:
The crack prevention member has a vertically arranged first sheet portion and a horizontally arranged second sheet portion, which are provided at intervals corresponding to each other, and The first sheet portion and the second sheet portion are vertically connected and integrally molded, and a notch is formed jointly on one side of the first sheet portion and the second sheet portion, At least two fixing holes adjacent to each other are formed in the side portions of the cutout of the end edges of the first sheet portion and the second sheet portion,
The fixing rods are respectively inserted into the corresponding two fixing holes of the first sheet portion and the second sheet portion of the crack prevention member. two vertical side lines passing vertically through the fixing bars are formed, and two horizontal side lines passing horizontally through the two fixing bars are formed on the second sheet portion, The two longitudinal edge lines and the two transverse edge lines together with the end edges of the first sheet portion and the second sheet portion jointly encircle to form a working zone, said working zone has at least one locating hole,
The positioning rods are respectively inserted into the corresponding positioning holes of the crack prevention member and fixed on the formwork,
A plurality of convex ribs are provided at intervals on the surface of the crack prevention member. The grooves are arc-shaped and parallel to each other,
Door window corner wall crack prevention assembly structure. The door window corner wall crack prevention assembly structure according to claim 1, wherein the crack prevention member is provided with a plurality of reinforcing recesses in the longitudinal direction of the convex rib. The door window corner wall crack prevention assembly structure according to claim 1, wherein a plurality of through holes are formed in the crack prevention member in the longitudinal direction of the groove. A crack prevention member of a door window corner wall crack prevention assembly structure, comprising:
The crack prevention member includes a first sheet portion arranged vertically and a second sheet portion arranged horizontally,
The first seat portion and the second seat portion are vertically connected and integrally formed, and a notch is formed jointly on one side of the first seat portion and the second seat portion. ,
A plurality of convex ribs are provided at intervals on the surface of the crack prevention member, and grooves are respectively provided between the two adjacent convex ribs. The grooves are arc-shaped and parallel to each other,
The anti-crack member of the door window corner wall anti-crack assembly structure. The crack prevention member of the door window corner wall crack prevention assembly structure according to claim 4, wherein the crack prevention member is provided with a plurality of reinforcing recesses in the longitudinal direction of the convex rib. The crack prevention member of the door window corner wall crack prevention assembly structure according to claim 4, wherein the crack prevention member is formed with a plurality of through holes in the longitudinal direction of the groove. At least two fixing holes adjacent to each other are formed in the side portions of the notches of the end edges of the first sheet portion and the second sheet portion of the crack prevention member,
The first sheet portion is formed with two vertical side lines passing through the two fixing holes in a vertical direction,
The second sheet portion is formed with two lateral side lines that pass laterally through the two fixing holes, and the two longitudinal side lines and the two lateral side lines are formed in the first seat portion. 5. A door according to claim 4, wherein said seat portion and said end edge of said second seat portion jointly enclose a working zone, said working zone having at least one locating hole. The anti-crack member of the window corner wall anti-crack assembly structure.

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