JP2003027632A - Jointing structure of wall panel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a jointing structure of wall panels promoting workability by preventing the slippage of a temporarily fitted joiner with construction work for making the other wall panel approach one wall panel to the temporary fitted joiner for a pair of wall panels arranged so as to form at right angles to a corner section in the end edge part of a floor pan. SOLUTION: A hook 12 provided to the rear end of a connection block 11 is engaged so as to cover from above to set the connection block 11 on the floor pan to fix. Connection projections 13 projected upwardly are provided on both the right and left ends of the front of the connection block 11 in parallel and at the same time, they are projected upward from the hook 12 to provide a falling preventing projection 16 on the rear section of the connecting block 11. A pair of wall panel side ends are fitted to the connecting projections 13 to connect the lower ends of a pair of wall panels to each other. The lower end of the joiner temporarily fitted to the rear side of one wall panel is located on the front side of the falling preventing projection 16.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wall panel connecting structure for connecting side end portions of a pair of wall panels arranged adjacent to each other at a corner portion of an edge portion of a floor pan. .

[0002]

2. Description of the Related Art Conventionally, a wall panel connecting structure for connecting side end portions of a pair of wall panels standing upright adjacent to a corner portion of an edge portion of a floor pan is shown in FIG. There was something like that. This is done by arranging the L-shaped angled joiners 14 'in alignment with the side ends of the pair of wall panels 1 and fixing the joiners 14' and the pair of wall panels 1 with screws. is there. In this wall panel connection structure, it is required to perform the construction work on the back side of the wall panel 1, and when the wall panel 1 is installed upright along the wall of the building frame. Was something that could not be adopted.

[0003]

However, the inventor of the present invention connects the pair of wall panels 1 by the construction work on the front side of the pair of wall panels 1 as shown in FIGS. We have devised a connection structure for wall panels that can be obtained.
This is a joiner 14 in which a plurality of rows of engaging hooks 15 are vertically arranged on the left and right ends of a metal plate in the longitudinal direction.
And a long vertical engaging hole 9 is formed in the back piece 7 in the vertical frame 5 at the side ends of the pair of wall panels 1, and the engaging hook 15 of the joiner 14 is engaged with the engaging hole 9. They are joined together to connect a pair of wall panels 1. Here, one of the engaging hooks 15 arranged side by side on the joiner 14 is formed of a long engaging hook 15a vertically longer than the other engaging hook 15, and the other engaging hook 15 is formed. 15 is composed of short engaging hooks 15b, and the long engaging hooks 15a are lightly hooked into the engaging holes 9 of one of the wall panels 1 for temporary engagement, that is, one of the wall panels 1 The joiner 14 is temporarily fixed by the temporary engagement of the long engagement hook 15a and the engagement hole 9 on the back side of the [Fig.
(A)], the other wall panel 1 is brought close to the joiner 14 temporarily fixed to the one wall panel 1, and at this time,
The short engagement hook 15b of the joiner 14 is inserted into the engagement hole 9 of the other wall panel 1 [see FIG. 7 (b)], and finally the joiner 14 is slid down to engage the engagement hook 15.
And the engagement hole 9 is engaged (see FIG. 8) so that the pair of wall panels 1 can be connected. In addition,
The pair of wall panels 1 arranged adjacent to each other is connected by a connection block 11 at the lower end thereof. Here, the connection block 11 is placed and fixed on a corner portion of the edge portion 3 of the floor pan 2 by engaging a hooking hook 12 with a standing piece 17 standing upright on the outer peripheral portion of the floor pan 2. By connecting a pair of connection projections 13 projecting upward at the left and right ends of the connection block 11 to the lower ends of the vertical frames 5 of the wall panels 1, connection at the lower ends of the pair of wall panels 1 can be achieved. Has been done.

However, when the other wall panel 1 is brought close to the joiner 14 temporarily fixed to one wall panel 1 in the above construction, the other wall panel 1 is joined to the joiner 1.
When it is pushed backwards strongly into 4, the joiner 14 rotates about the temporary engagement portion between the long engagement hook 15a of the joiner 14 and the engagement hole 9 of the one wall panel 1, and the joiner There is a problem that 14 is separated from one wall panel 1. This is because it is difficult to visually measure the arrangement position of the other wall panel 1 from the front side, which is the working position, so that the pair of wall panels 1 in the corner portion of the edge portion 3 of the floor pan 2 are orthogonal to each other. It was a problem when placing them.

The present invention has been made in view of the above points, and in a pair of wall panels that are arranged so as to be orthogonal to the corners of the edge portion of the floor pan, the joiner temporarily fixed to one wall panel. It is an object of the present invention to provide a wall panel connection structure that prevents detachment of a temporarily joined joiner in construction work in which the other wall panel is brought close to the other wall panel to improve workability.

[0006]

In order to solve the above-mentioned problems, the wall panel connection structure according to claim 1 of the present invention has a pair of wall panels 1 at the corners of the edge portions 3 of the floor pan 2. Arrange them so that they are orthogonal to each other and the side edges are adjacent to each other.
A plate-shaped joiner 14 extending vertically is arranged on the back side of the pair of wall panels 1 so as to be vertically slidable.
4 is temporarily fixed to one wall panel 1 through a temporary engagement means provided on one wall panel 1 of the pair of wall panels 1, and the temporarily fixed joiner 14 is slid down to make a pair of walls. The main engaging means respectively provided on the panel 1 is permanently engaged,
The pair of wall panels 1 with the joiner 14 that is fully engaged.
In the connection structure of the wall panels connected to each other, the hooks 12 provided at the rear ends of the connection blocks 11 are engaged so as to cover from above and the connection blocks 11 are placed and fixed on the floor pan 2 and connected. Connecting protrusions 13 projecting upward are juxtaposed at both left and right ends of the front part of the block 11, and fall prevention protrusions 16 are provided on the rear part of the connecting block 11 so as to project upward from the hooks 12. To 1
The side ends of the pair of wall panels 1 are fitted to each other, and the pair of wall panels 1
The lower end of the joiner 14 temporarily connected to the back side of the one wall panel 1 is located in front of the fall prevention protrusion 16 by connecting the lower ends of the two. As a result, the joint block 11 for connecting the lower ends of the pair of wall panels 1 is provided with a fall prevention protrusion 16 at a rear portion thereof so as to project above the hooking hook 12 and is temporarily fixed to the back side of one wall panel 1. Since the lower end of 14 is located on the front side of the fall prevention protrusion 16, it is a construction work for connecting the pair of wall panels 1 so as to be orthogonal to the corner portion of the edge portion 3 of the floor pan 2. When the other wall panel 1 is brought close to the joiner 14 temporarily fixed to the back side of the wall panel 1 of the other through the temporary locking means, the construction worker mistakenly makes an eye measurement of the other wall panel 1 with respect to the joiner 14. Even if the joiner 14 is strongly pushed backward, the lower end of the joiner 14 is brought into contact with the fall prevention protrusion 16, that is, the fall prevention protrusion 16 restricts the movement of the joiner 14 to the back side. Since it functions as a stopper, the joiner 14 temporarily fixed to the one wall panel 1 is rotated around the temporarily fixed portion so that the joiner 14 is removed from the one wall panel 1. It is prevented from coming off.

A wall panel connection structure according to a second aspect of the present invention is the wall panel connection structure according to the first aspect.
The upper part of the sloped surface 2 is located at the back toward the top.
5 is provided. Thus, when the lower end of the joiner 14 is positioned in the groove 27 of the connection block 11 when the joiner 14 is temporarily fixed to the one wall panel 1, the lower end of the joiner 14 is prevented from collapsing.
The lower end of the joiner 14 can be smoothly arranged on the front surface side of the fall prevention protrusion 16 by sliding it downward from above along the inclined surface 25 of 6.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention will be described below based on the embodiments shown in the accompanying drawings.

1 to 7 show an example of an embodiment of the present invention. The edge portion 3 of the floor pan 2 is formed in a trapezoidal shape so as to be one step higher than the central portion of the floor pan 2, and a standing piece 17 is formed on the entire outer peripheral portion of the floor pan 2. ing. In a unit room such as a bathroom using the floor pan 2, a wall surface is formed on the peripheral portion of the floor pan 2. The wall surface is placed on the trapezoidal edge portion 3 of the floor pan 2. It is formed by a plurality of wall panels 1 that are vertically installed. The wall panels 1 are arranged so that their side ends are adjacent to each other, but the pair of adjacent wall panels 1 are connected to each other by the joiners 14 at their rear surfaces and at the connection blocks 11 at their lower ends. is there. Here, the temporary engagement and the final engagement at the time of connecting the joiner 14 and the pair of wall panels 1 defined in claim 1 are the same as the wall panel connection structure devised by the present inventor. , A plurality of engaging hooks 15 which are vertically arranged in a row on the left and right of the joiner 14 are composed of long engaging hooks 15a and short engaging hooks 15b, and are attached to the back piece 7 of the vertical frame 5 of the wall panel 1. The engaging hole 9 is a vertically long rectangular hole, and the engaging hook 15 is engaged with the engaging hole 9 in two steps by vertically sliding the joiner 14. Further, the present invention has an advantage in joining a pair of wall panels 1 arranged orthogonally to the corner portion of the edge portion 3 of the floor pan 2, and therefore the following description will be given to the edge of the floor pan 2 below. A connection structure of a pair of wall panels arranged orthogonally to the corner portion of the edge portion 3 will be described.

The wall panel 1 and the joiner 14 of this example are the same as those used in the example of the technique previously devised by the present inventor. The wall panel 1 is configured by attaching a heat insulating material 31 to the back surface of the central portion of the metal plate and bending the metal plate at both side ends to form a vertical frame 5. The vertical frame 5 includes side pieces 6 facing laterally, and a back piece 7 formed by bending the side edges of the side pieces 6 inward at a right angle.
And a flange piece 8 formed by bending forward from the inner end of the back piece 7 at a substantially right angle (FIG. 6). The vertical frame 5 is formed substantially in the vertical direction of the wall panel 1. The back piece 7 has a plurality of vertically long rectangular engaging holes 9 vertically arranged at regular intervals. It is set up.

The joiner 14 has a pair of back piece facing surfaces 18 at both ends so as to face the back surfaces of the pair of wall panels 1 arranged orthogonally to the corners of the edge portion 3 of the floor pan 2. It is a metal plate that extends over the vertical direction. A plurality of engaging hooks 15 are vertically provided at regular intervals on a pair of back piece facing surfaces 18 located at both ends of the joiner 14. As shown in FIGS. 7 and 8, the engagement hook 15 is formed by cutting and raising the joiner 14, and a horizontal piece 19 that horizontally protrudes toward the front side, and a front end of the horizontal piece 19 is provided on a facing surface 18 of the back piece. It is configured to have a hanging piece 20 that hangs diagonally downward and a guide piece 22 that hangs diagonally downward and forward from the lower end of the hanging piece 20. A portion of the lower end of the elastic contact portion 21 which elastically contacts the back piece facing surface 18 is referred to as an elastic contact portion 21. In the engagement hook 15, the engagement hook 15 provided on one of the back piece facing surfaces 18 is composed of a long engagement hook 15a that is vertically elongated and the other back piece facing surface 1 is formed.
The engaging hooks 15 provided in No. 8 are composed of short engaging hooks 15b that are vertically shorter than the above-described long engaging hooks 15a. Here, the long engagement hook 15a and the short engagement hook 1
The relationship with 5b is that the long engagement hook 15a and the short engagement hook 15b are provided at the same height position of the joiner 14, and the elastic contact portion 21 of the long engagement hook 15a is a guide of the short engagement hook 15b. It has a positional relationship such that it is located below the lower end of the piece 22.

The connection block 11, as shown in FIG.
A connecting protrusion which has an L-shaped bottom piece 23 (FIG. 6) in a top view and which has upwardly projecting standing portions 24 arranged at both left and right ends of the bottom piece 23, and projecting upward at the front end portion of the standing portion 24. 13 is provided, and the fall prevention protrusion 16 is provided so as to project upward with the concave groove 27 interposed behind the connection protrusion 13.
The hanging hook 12 formed by curving downward is provided at the rear end portion of the standing portion 24, and a water return piece 30 for connecting the front ends of the standing portion 24 is provided. . Here, the fall prevention protrusion 16 is projected at least above the hook 12 and restricts the movement of the lower end of the joiner 14 temporarily fixed to one wall panel 1 described later to the back side. The water return piece 30 prevents water from entering the back side of the wall panel 1 when the connection block 11 is arranged at a predetermined position. An inclined surface 26 is provided on the upper portion of the connection protrusion 13 so that the connection protrusion 13 is sharpened toward the tip of the protrusion, and the upper portion of the fall prevention protrusion 16 is located on the back side toward the upper end. An inclined surface 25 is provided.

The inventor has previously devised a method for connecting a pair of wall panels 1 arranged adjacent to each other at right angles to the corner portion of the edge portion 3 of the floor pan 2 via the above-mentioned joiner 14 and connecting block 11. Similar to the technology, it is performed by the following construction work.

First, the connection block 11 is placed and fixed on the corner portion of the edge portion 3 of the floor pan 2. Specifically, as shown in FIG. 2, the hooks 12 of the connecting block 11 are engaged with the standing pieces 17 orthogonal to each other at the corners of the floor pan 2 and the bottom piece 2 of the connecting block 11 is engaged.
3 is placed on the upper surface of the trapezoidal edge portion 3 of the floor pan 2, and at this time, the protective tape 28 of the double-sided tape provided on the lower surface of the bottom piece 23 of the connection block 11 is removed to remove the trapezoidal edge of the floor pan 2. By attaching the bottom piece 23 of the connection block 11 to the packing 4 attached over the portion 3 via the above double-sided tape, the connection block 11 is placed and fixed on the corner portion of the edge portion 3 of the floor pan 2. To do.

Next, the wall panel 1 is placed along the standing piece 17 of the floor pan 2 and placed on the edge portion 3 of the floor pan 2. In addition, although a pair of wall panels 1 is finally arranged to be orthogonal to each other at a corner portion of the edge portion 3 of the floor pan 2, first, one wall panel 1 of the pair of wall panels 1 is arranged. To do. Specifically, as shown in FIG. 3, the hooks 10 provided on the back surface of the wall panel 1 are engaged with the standing pieces 17 of the floor pan 2, and at the corners of the edge portion 3 of the floor pan 2. Inner space 2 surrounded by the side end of the positioned wall panel 1, that is, the side piece 6 of the vertical frame 5, the back piece 7, and the flange piece 8.
By fitting the connection protrusion 13 of the connection block 11 to 9,
One wall panel 1 is erected at a predetermined position. At this time, the back piece 7 of the vertical frame 5 of the wall panel 1 is located in the groove 27 of the connection block 11.

Next, the joiner 14 is temporarily fixed to the one wall panel 1 which is erected on the edge portion 3 of the floor pan 2 via the connection block 11. Specifically, as shown in FIG. 4, the joiner 14 is arranged on the back side of the one wall panel 1, and at this time, the back piece facing surface 18 of the joiner 14 is made to face the back piece 7 of the vertical frame 5. Then, the long engagement hook 15a of the joiner 14 is inserted into the engagement hole 9 of the back piece 7, and the elastic contact portion 21 of the long engagement hook 15a is locked to the lower edge of the engagement hole 9 to thereby join the joiner. 14 is temporarily fixed to one wall panel 1 [FIG. 7 (a)]. Here, the temporarily fixed joiner 14 is in a state of being suspended from one wall panel 1 and floating in the air, and its lower end is located on the front side of the fall prevention protrusion 16 of the connection block 11. (Fig. 5). In other words, since the lower end of the temporarily fixed joiner 14 is located on the front surface side of the fall prevention protrusion 16, the fall prevention protrusion 16 restricts the backward movement of the joiner 14 and is temporarily fixed. . When temporarily joining the joiner 14 to one wall panel 1 so that the lower end of the joiner 14 is located on the front side of the fall prevention protrusion 16, the joiner 14 prevents the connection block 11 from falling from the back side of the wall panel 1. Although it is made to pass over the protrusion 16 and come close to the wall panel 1, as described above, since the inclined surface 25 that is inclined toward the concave groove 27 is formed on the upper portion of the fall prevention protrusion 16, the joiner 14 By sliding the lower end from the upper side to the lower side along the inclined surface 25 of the fall prevention protrusion 16, the joiner 14 can be smoothly arranged on the front side of the fall prevention protrusion 16.

Next, as shown in FIG. 5, the other wall panel 1 is made orthogonal to the one wall panel 1 and the side ends of the wall panel 1 are adjacent to each other to form an edge of the floor pan 2. It is arranged at a predetermined position of the corner portion of the portion 3. In addition,
Like the one wall panel 1, the other wall panel 1 is also provided with a hooking hook 12 on the back surface. The hooking hook 12 is engaged with the standing piece 17 of the floor pan 2 and the floor pan 2 stands. It is placed on the end portion 3 having a circular shape, and the side end portion of the other wall panel 1, that is, the vertical frame 5 is fitted into the connection protrusion 13 of the connection block 11, so that the end of the floor pan 2 of the other wall panel 1 is fitted. Arrangement at the corner portion of the edge portion 3 is performed. In this state, the lower end portions of the pair of wall panels 1 are connected to the connection block 1
1 is connected. In addition, regarding the relationship between the other wall panel 1 arranged at the corner portion of the edge portion 3 of the floor pan 2 and the joiner 14 temporarily fixed to the one wall panel 1, the long engagement hook of the joiner 14 described above is used. Depending on the positional relationship between the short engagement hook 15b and the short engagement hook 15b, the joiner 1 is inserted into the engagement hole 9 provided in the back piece 7 of the vertical frame 5 of the other wall panel 1.
The short engaging hook 15b of No. 4 is inserted [FIG.
(B)].

Next, the joiner 14 temporarily fixed to the one wall panel 1 is slid down by using a tool 32 such as a mallet, so that the long engagement hook 15a and the short engagement hook 15b form a pair. The back pieces 7 of the vertical frames 5 of the pair of wall panels 1 are engaged with the lower edge portions of the respective engagement holes 9 of the wall panel 1 and are connected via the joiner 14 (FIG. 8).
The lower end of the slide-down joiner 14 is located in the groove 27, and the joiner 14 is formed by the back piece 7 of the vertical frame 5 of the wall panel 1 also located in the groove 27. Is sandwiched. By such construction work, a pair of wall panels 1 that are arranged adjacent to each other at a corner portion of the edge portion 3 of the floor pan 2 at right angles to each other.
Are connected via the joiner 14 and the connection block 11.

Since the construction work described above is substantially the same as the technique devised by the present inventor, the other work should be performed so as to approach the joiner 14 temporarily fixed to one wall panel 1. When arranging the other wall panel 1 at the corner portion of the edge portion 3 of the floor pan 2, it is difficult to visually observe the arrangement position of the other wall panel 1 from the front side of the other wall panel 1 which is still the working position. Therefore, the construction worker may erroneously push the other wall panel 1 strongly behind the joiner 14 in the back direction. In this example, in the joiner 14 temporarily fixed to the one wall panel 1, since the lower end of the temporarily fixed joiner 14 is located on the front side of the fall prevention protrusion 16 provided on the connection block 11, the construction work is performed. When the person strongly pushes the other wall panel 1 backwards against the temporarily fixed joiner 14, the joiner 14 is prevented from falling down.
Is restricted from moving to the back side, that is, the fall prevention protrusion 1
Since 6 functions as a stopper that restricts the movement of the joiner 14 to the back side,
It is possible to prevent the joiner 14 from being disengaged from the one wall panel 1 by rotating about the temporary engagement portion with the one wall panel 1, and to improve the workability. It is what has been.

[0020]

As described above, in the wall panel connecting structure according to the first aspect of the present invention, the connecting projections protruding upward are provided in parallel at both left and right ends of the front portion of the connecting block. A fall prevention protrusion is provided at a rear portion of the connection block so as to project upward from the hook, and the side ends of the pair of wall panels are fitted to the connection protrusion to connect the lower ends of the pair of wall panels to each other. Since the lower end of the joiner temporarily fixed to the back side of the wall panel of was placed in front of the fall prevention protrusion,
It is a construction work for connecting a pair of wall panels so that they are orthogonal to each other at the corners of the edge portion of the floor pan, and a joiner temporarily fixed to the back side of one wall panel via a temporary locking means and the other wall panel. When the construction worker mistakenly pushes the other wall panel backwards against the joiner when making a close contact, the temporarily fixed joiner will have its lower end in front of the fall prevention protrusion. Abutted,
In other words, since the fall prevention protrusion functions as a stopper that restricts the movement of the joiner to the back, the joiner temporarily fixed to the one wall panel is rotated around the temporarily fixed portion. It is possible to prevent the joiner from coming off from the one wall panel 1, and the workability is improved.

In addition, in the wall panel connection structure according to claim 2 of the present invention, in addition to the effect of claim 1, the upper part of the fall prevention protrusion is located behind the upper end. Since an inclined surface is provided, when temporarily joining the joiner to one wall panel, the lower end of the joiner is positioned in the groove of the connection block. By sliding it down, the lower end of the joiner can be smoothly placed on the front side of the fall prevention protrusion.

[Brief description of drawings]

FIG. 1 is a perspective view showing a connection block in an example of an embodiment of the present invention.

FIG. 2 is a perspective view for explaining the connection construction of a pair of wall panels of the above, showing a state in which a connection block is installed at a corner portion at an edge portion of a floor pan.

FIG. 3 is a perspective view for explaining the connection construction of a pair of wall panels of the above, showing a state in which one wall panel is arranged at a corner portion at an edge portion of a floor pan.

FIG. 4 is a perspective view for explaining the connection construction of a pair of wall panels of the above, showing a state in which a joiner is arranged on one wall panel arranged at a corner portion at an edge portion of a floor pan.

FIG. 5 is a view for explaining the connection construction of a pair of wall panels in the same as above, in which the other wall panel is brought close to the joiner temporarily fixed to one wall panel arranged at the corner portion of the edge portion of the floor pan. It is a perspective view showing a state.

FIG. 6 is a top view showing a state in which one wall panel is arranged at a corner portion in an edge portion of the floor pan.

FIG. 7 is a side sectional view showing a temporary locking state between the joiner and the wall panel of the same, and FIG. 7 (a) shows a temporary locking state of the long engagement hook into the engagement hole, b) shows a state in which the short engagement hook is inserted into the engagement hole.

FIG. 8 is a side sectional view showing a connection state between the joiner and the wall panel of the same, FIG. 8A shows an engagement state of the long engagement hook with an engagement hole, and FIG. It shows the engagement state of the short engagement hook with the engagement hole.

FIG. 9 is a perspective view from the back of the wall panel, showing an example of the prior art, showing a state in which the wall panels are connected using an L-type joiner.

FIG. 10 is a connection structure of a wall panel devised by the inventor in view of the above problems of the prior art, for explaining connection construction of a pair of wall panels, and a corner at an edge portion of a floor pan. FIG. 6 is a perspective view showing a state in which a joiner is arranged on one wall panel arranged in the section.

FIG. 11 is a wall panel connection structure devised by the inventor of the above, explaining the connection construction of a pair of wall panels, wherein one wall is arranged at a corner portion of the edge portion of the floor pan. It is a perspective view showing the state where the other wall panel is brought close to the joiner temporarily fixed to the panel.

[Explanation of symbols]

1 wall panel 2 floor bread 3 edge part 5 vertical frames 7 Back piece 9 Engagement hole 11 connection block 13 Connection protrusion 14 Joiner 15 Engaging hook 15a Long engagement hook 15b Short engagement hook 16 Fall prevention protrusion 18 Back Side Opposite Side 25 slope

Claims (2)

[Claims] 1. A plate-like member extending vertically in the back side of a pair of wall panels, with a pair of wall panels being orthogonal to each other at the corners at the edge portions of the floor pan and side edges being adjacent to each other. A joiner is arranged to be slidable up and down, the joiner is temporarily fixed to one wall panel through a temporary engagement means provided on one wall panel of the pair of wall panels, and the temporarily joined joiner is slid down. In the connection structure of the wall panels in which the main engagement means provided on each of the pair of wall panels is permanently engaged, and the pair of wall panels is connected by the joiner that is permanently engaged, the rear end of the connection block The connection block is mounted and fixed on the floor pan by engaging the hooks provided on the upper side so as to cover it from above, and the connection protrusions protruding upward are provided in parallel on both left and right ends of the front part of the connection block. Together with the above connection Provided at the rear part of the lock with a fall-prevention projection that protrudes above the hook and
The side ends of the pair of wall panels are fitted to connect the lower ends of the pair of wall panels to each other, and the lower end of the joiner temporarily fixed to the back side of one wall panel is positioned in front of the fall prevention protrusion. Characteristic wall panel connection structure. 2. The wall panel connection structure according to claim 1, wherein an upper part of the fall prevention protrusion is provided with an inclined surface which is located on the back side toward the upper end.