JP7446151B2 - How to assemble the four-circumference frame of the panel - Google Patents

Description

The present invention relates to a method for assembling a four-circumference frame of a panel.

A steel door consists of a four-circumference frame and a surface material attached to the four-circumference frame, and the four-circumference frame is provided inside to ensure the strength of the door body. Generally, four-frame frames are assembled in a four-circle shape by welding the ends of long frame materials together, but the welding process requires skilled techniques and poses issues from a safety perspective. be.

Various attempts have been made to assemble the four-periphery frame of the door body without using welding (Patent Documents 1 to 5).

The present invention attempts to assemble a four-circumference frame without using welding, in a method different from conventional methods that do not use welding.
Utsukai Showa 58-44387 Jitsukai Showa 61-3890 JP2000-73669 JP2003-193759 JP2015-209745

An object of the present invention is to improve the workability of connecting the ends of each frame member of a four-circumference frame.

The technical means adopted by the present invention to solve such problems are as follows:
A method for assembling a four-circumference frame consisting of upper and lower horizontal frames and left and right vertical frames,
One of the horizontal frame and the vertical frame is a first frame material, and the other is a second frame material,
A first protrusion and a second protrusion are formed at the longitudinal end of the first frame member in the width direction,
A first locking receiving portion to which the first projection locks and a second locking receiving portion to which the second projection locks are formed facing each other at the longitudinal end of the second frame member. and
Inserting and locking the first protrusion of the first frame member into the first locking receiving portion of the second frame member,
While the first frame member is rotated about the first locking receiver with the first protrusion locked in the first locking receiver, the second protrusion is rotated around the second locking receiver. Lock it in the retaining part,
This is a method for assembling a four-circumference frame of a panel.
In one aspect, the first locking receiving portion is a hole.
In one aspect, the second lock receiving portion is formed as a groove portion including the second lock receiving portion and a guide portion.
In one aspect, the second lock receiving portion is a hole.

In one aspect, the second locking receiving portion is formed as a groove portion consisting of the second locking receiving portion and a guide portion,
The first protrusion of the first frame member is inserted into the first locking receiving portion of the second frame member to be locked, and at this time, the first frame member is configured such that the second protrusion is aligned with the opening of the groove. It is in a posture located outside of
While the first frame member is rotated about the first locking receiver with the first protrusion locked in the first locking receiver, the second protrusion is moved into the groove. It is moved along the guide portion and is locked in the second lock receiving portion.
In one aspect, when inserting the first protrusion into the first locking receptacle of the second frame member, the length direction of the first frame member is perpendicular to the length direction of the second frame member. Posture.
In one aspect, when the first frame member is placed in a position extending generally in the vertical direction and the end portion of the second frame member is locked to the upper end of the first frame member,
When the first protrusion is inserted into the first locking receiving portion of the second frame member, the first frame member is in a posture (slanted posture) in which the second protrusion is raised relative to the first protrusion. ,
While rotating the first frame material so as to lower the second protrusion with the first protrusion being engaged with the first retaining part, the second protrusion is rotated about the first retaining part as a base point, The second protrusion is moved along the guide portion of the groove and is locked in the second lock receiving portion.

In one aspect, in the groove, the width of the second locking receiving part is larger than the width of the guide part on the back side.
In one aspect, the width of the second protrusion increases in the direction away from the tip.
In one aspect, the insertion depth of the first protrusion into the first locking receiver can be adjusted in the locked state with the first locking receiver.
In one aspect, when the first frame member rotates with respect to the second frame member, the width dimension of the second protrusion at the inner edge of the groove portion is set such that the tip of the second protrusion enters the guide portion shallowly. is smaller than or equal to the width dimension on the back side of the guide part to allow the second protrusion to pass through the guide part,
After the second protrusion passes through the guide part and locks into the second locking receiver, the second projection is deeply inserted into the second locking receiver, and the inner edge of the groove is locked. The width of the second protrusion is made larger than the width on the back side of the guide part to prevent the first frame member from rotating in the direction in which the second protrusion is removed from the second locking receiving part. regulate.

In one aspect, the second protrusion includes a protruding edge at a tip, a first side edge, and a second side edge,
The dimension between the first side edge and the second side edge of the second protrusion increases in the direction away from the protruding end edge.
In one aspect, at least one of the first side edge and the second side edge is an inclined edge.
In one aspect, the width dimension of the first protrusion increases in the direction away from the tip.
In one aspect, the first protrusion includes a protruding edge at a tip, a first side edge, and a second side edge,
The dimension between the first side edge and the second side edge of the first protrusion increases in a direction away from the protruding edge.
In one aspect, at least one of the first side edge and the second side edge is an inclined edge.
In an embodiment, the first protrusion and the second protrusion have the same symmetrical shape.

In one aspect, the first frame member includes a surface portion, and a first side surface portion and a second side surface portion rising from both sides of the surface portion in the width direction,
The second frame member includes a surface portion, a first side surface portion and a second side surface portion rising from both sides of the surface portion in the width direction,
The longitudinal end portion of the surface portion of the first frame member includes an extending portion that protrudes beyond the longitudinal edges of the first side portion and the second side portion, and The first protrusion and the second protrusion are formed on both sides, respectively,
The first locking receiving portion to which the first protrusion is locked is provided at the longitudinal end of the first side surface of the second frame member, and the second locking receiving portion is provided at the longitudinal end of the second side surface of the second frame member. The second locking receiving portions to which the protrusions lock are formed to face each other.
When the second lock receiving portion is formed in a groove, the guide portion of the groove is open at an edge of the second side surface of the second frame member.

In one aspect, the edge of the second side surface portion of the second frame member includes an edge at a lengthwise end and a side edge at a widthwise end,
The opening of the guide portion of the groove portion is formed at the edge of the longitudinal end portion.
In this case, the guide portion extends in the length direction of the second frame member (second side surface portion).
In one aspect, the edge of the second side surface portion of the second frame member includes an edge at a lengthwise end and a side edge at a widthwise end,
The opening of the guide portion of the groove portion is formed at the side edge.
In this case, the guide portion includes a first portion extending in the width direction of the second frame member (second side surface portion) and a second portion extending in the length direction.

In one aspect, a first groove is formed between the first protrusion and an edge of the longitudinal end of the first side surface of the first frame member,
When inserting the first protrusion into the first locking receiver, a portion of the first side surface of the second frame member between the first locking receiver and the side edge is inserted into the first recess. It is designed to fit into the groove,
A second groove is formed between the second protrusion and the edge of the longitudinal end of the second side surface of the first frame member,
When the second protrusion moves through the guide portion of the groove, a portion of the second side surface of the second frame member between the guide portion and the side edge moves within the second groove. It looks like this.

In the present invention, the first frame material is locked by inserting the first protrusion into the first locking receiving part of the second frame member, and rotating the first frame member about the first locking receiving part as a base point, and then attaching the second protrusion to the second frame member. The end portion of the first frame member and the end portion of the second frame member are connected by a rotational movement of locking the frame member to the second lock receiving portion, and the workability is good.

They are a front view, a top view, and a side view seen from the door end side of the steel door according to the present embodiment. FIG. 2 is an exploded perspective view showing a four-perimeter frame, a first surface material, and a second surface material of the steel door according to the present embodiment. It is a longitudinal cross-sectional view of the steel door concerning this embodiment. It is a cross-sectional view of the steel door concerning this embodiment. FIG. 2 is a top view and a front view of the four-circumference frame according to the present embodiment. FIG. 2 is a side view of the four-circumference frame according to the present embodiment, viewed from the door end side. It is a figure showing horizontal frames (upper frame, lower frame) concerning this embodiment. 8 is a partially enlarged view of the hole in FIG. 7. FIG. 8 is a partially enlarged view of the groove portion in FIG. 7. FIG. It is a figure showing the vertical frame concerning this embodiment. 11 is a partially enlarged view of an extending portion of the vertical frame in FIG. 10. FIG. 11 is a partially enlarged view of a protrusion and a groove in FIG. 10. FIG. It is a figure explaining the connection method of the horizontal frame and the vertical frame based on this embodiment. 3 is a partially enlarged view of a corner of the four-circumference frame shown in FIG. 2. FIG. FIG. 3 is a detailed diagram showing a process of connecting the horizontal frame and the vertical frame according to the present embodiment (insertion of the first protrusion into the hole). FIG. 7 is a detailed view showing the process of connecting the horizontal frame and the vertical frame according to the present embodiment (inserting the groove of the second protrusion into the guide portion). FIG. 6 is a detailed view showing the process of connecting the horizontal frame and the vertical frame according to the present embodiment (insertion of the groove of the second protrusion into the locking receiving part). FIG. 7 is a detailed view showing a process of connecting the horizontal frame and the vertical frame according to the present embodiment (pushing the groove of the second protrusion into the locking receiving part). It is a figure which shows other embodiments of a groove part.

[A] Steel Door A steel door (steel door panel) P according to the present embodiment will be described with reference to FIGS. 1 to 4. As shown in Fig. 1, the steel door P is a door body used for a hinged door, and one side in the width direction is the door end side, and the other side is the door end side, and the door end side part has a middle part in the height direction. A locking device J is built into the door, and a plurality of hinges H are provided at intervals in the height direction at the door end side.

As shown in FIG. 2, the steel door P is made by pasting a first surface material 10 and a second surface material 11 made of thin steel plates to a four-circumference frame body, that is, a four-circumference frame 1, which is the aggregate of the door body. It consists of things. As shown in FIGS. 2 to 4, the first surface material 10 includes a surface portion 10a forming one facing surface of the steel door P, an upper piece 10b and a lower piece 10c formed by bending around the four circumferences of the surface portion 10a. , one (door end side) side piece 10d, and the other (door end side) side piece 10e. As shown in FIGS. 2 to 4, the second surface material 11 includes a surface portion 11a that forms the other facing surface of the steel door P, an upper piece 11b and a lower piece 11c that are bent around the four circumferences of the surface portion 11a. , one (door end side) side piece 11d, and the other (door end side) side piece 11e.

A core material (for example, paper core C) is provided in the hollow portion of the steel door P. Further, in addition to the four-periphery frame 1, the steel door P may include one or more cores extending in the height direction. In this embodiment, the steel door P is used for a swinging door, but the steel door P is not limited to a swinging door, and may be used for other door devices such as a sliding door. The structure of the steel door P can also be employed in architectural panels other than door devices (for example, partition panels).

[B] Four-circle frame As shown in FIGS. 5 and 6, the four-circle frame 1 includes an upper frame 2 and a lower frame 3 extending in a first direction, and left and right frames extending in a second direction perpendicular to the first direction. It is assembled from vertical frames 4 and 5. Specifically, one end in the length direction of the upper frame 2 and the upper end in the height direction of one vertical frame 4, and the other end in the length direction of the upper frame 2 and the other vertical frame 5. The upper end in the height direction, one end in the length direction of the lower frame 3 and the lower end in the height direction of one vertical frame 4, the other end in the length direction of the lower frame 3 and the other vertical frame The four-circumference frame 1 is formed by fitting the lower end portions of the frames 5 in the height direction to each other. The end portions of the frame members 2, 3, 4, and 5 are connected to each other only by fitting the frame members 2, 3, 4, and 5 together without welding or screwing.

In this embodiment, the upper frame 2 and the lower frame 3 are the same member, and FIGS. 7 and 8 can be used to explain both the upper frame 2 and the lower frame 3. In this specification, the upper frame 2 and the lower frame 3 are collectively referred to as a horizontal frame, and the description of the upper frame 2 and the lower frame 3 can be referred to as the description of the horizontal frame. The left and right vertical frames 4 and 5 are the same member, and FIGS. 10 and 11 can be used to explain both the left and right vertical frames 4 and 5. In this embodiment, one vertical frame 4 is the vertical frame on the door end side, and the other vertical frame 5 is the vertical frame on the door end side. The upper frame 2, the lower frame 3, and the left and right vertical frames 4 and 5 are formed by bending steel plates of a predetermined thickness. Below, the upper frame 2, the lower frame 3, and the left and right vertical frames 4 and 5 will be specifically explained.

[B-1] Upper frame As shown in FIG. 7, the upper frame 2 includes a surface portion 20 having predetermined length and width dimensions, and first side portions that stand up from both ends of the surface portion 20 in the width direction in an opposing manner. 21, a long member having a second side surface portion 22 and a U-shape in cross section. In the four-circumference frame 1 according to the present embodiment, the upper frame 2 has the surface portion 20 as the upper surface, and the first side surface portion 21 and the second side surface portion 22 are suspended from the surface portion 20 (FIGS. 3, 5, (See Figure 6). That is, in the four-circle frame 1, the upper frame 2 shown in FIG. 7 is in a posture rotated by 180 degrees. In the four-periphery frame 1, the outer surface of the first side surface portion 21 and the outer surface of the second side surface portion 22 of the upper frame 2 serve as the facing surfaces. In the steel door P, the width direction of the surface portion 20 of the upper frame 2 is the width direction of the steel door P, and the length direction of the surface portion 20 is the width direction of the steel door P.

In the upper frame 2 according to the present embodiment, one longitudinal edge 200 of the surface section 20, one longitudinal edge 210 of the first side surface section 21, and one longitudinal edge 210 of the second side surface section 22. One edge 220 coincides with the other edge 201 in the length direction of the surface part 20, the other edge 211 in the length direction of the first side part 21, and the length direction of the second side part 22. The other edge 221 of is coincident. That is, the length dimensions of the first side surface portion 21 and the second side surface portion 22 match the length dimensions of the surface portion 20. The width dimension (rise dimension) of the first side surface portion 21 and the width dimension (rise dimension) of the second side surface portion 22 are the same, and the side edge 212 of the first side surface portion 21 of the first side surface portion 21 and the second side surface portion The side edges 222 of 22 are on a virtual plane parallel to the surface portion 20.

In the upper frame 2, the first side surface portion 21 and the second side surface portion 22 are spaced apart and facing each other. In this embodiment, a hole 6 is formed at one end in the length direction of the first side surface portion 21 of the upper frame 2, and a hole 6 is formed at the other end in the length direction. A groove 7 is formed at one end in the length direction of the second side surface portion 22, and a groove 7 is formed at the other end in the length direction. The hole 6 formed at the longitudinal end of the first side surface 21 and the groove 7 (locking receiving section 70) formed at the longitudinal end of the second side surface 22 are opposed to each other. Note that a hole 6 is formed at one end in the length direction of the first side surface portion 21, a groove portion 7 is formed at the other end in the length direction, and a groove portion 7 is formed at one end side in the length direction of the second side surface portion 22. However, the hole 6 may be formed at the other end in the length direction. Furthermore, the first side surface portion 21 and the second side surface portion 22 are merely identifications of two opposing side surface portions of the upper frame 2, and the first side surface portion 21 and the second side surface portion 22 are different from each other with respect to the door end side and the door end side. The second side surface portion 22 may be replaced, and "one end edge 200, 210, 220" and "the other end edge 201, 211, 221" in the length direction may be replaced.

[B-2] Lower frame As shown in FIG. 7, the lower frame 3 includes a surface portion 30 having predetermined length and width dimensions, and first side portions that stand up from both ends of the surface portion 30 in the width direction in an opposing manner. 31, a long member having a second side surface portion 32 and a U-shape in cross section. In the four-circumference frame 1 according to the present embodiment, the lower frame 3 has the surface portion 30 as the lower surface, and the first side surface portion 31 and the second side surface portion 32 are vertically raised from the surface portion 30 (FIGS. 3 and 3). 5, see Figure 6). In the four-periphery frame 1, the outer surface of the first side surface portion 31 and the outer surface of the second side surface portion 32 of the lower frame 3 serve as facing surfaces. In the steel door P, the width direction of the surface portion 30 of the lower frame 3 is the expected direction or thickness direction of the steel door P, and the length direction of the surface portion 20 is the width direction of the steel door P.

In the lower frame 3 according to the present embodiment, one longitudinal edge 300 of the surface section 30, one longitudinal edge 310 of the first side surface section 31, and one longitudinal edge 310 of the second side surface section 32. One end edge 320 coincides with the other end edge 301 in the length direction of the surface portion 30, the other end edge 311 in the length direction of the first side surface portion 31, and the length direction of the second side surface portion 32. The other edge 321 of is coincident. That is, the length dimensions of the first side surface portion 31 and the second side surface portion 32 match the length dimensions of the surface portion 30. The width dimension (rise dimension) of the first side surface section 31 and the width dimension (rise dimension) of the second side surface section 32 are the same, and the side edge 312 of the first side surface section 31 of the first side surface section 31 and the second side surface section The side edge 322 of 32 is on a virtual plane parallel to the surface portion 30.

In the lower frame 3, the first side surface portion 31 and the second side surface portion 32 are spaced apart and face each other. In this embodiment, a hole 6 is formed at one end in the length direction of the first side surface portion 31 of the lower frame 3, and a hole 6 is formed at the other end in the length direction. A groove 7 is formed at one end in the length direction of the second side surface portion 32, and a groove 7 is formed at the other end in the length direction. The hole 6 formed at the lengthwise end of the first side face 31 and the groove 7 (locking receiving part 70) formed at the lengthwise end of the second side face 32 are opposed to each other. Note that a hole 6 is formed at one end in the length direction of the first side surface portion 31, a groove portion 7 is formed at the other end in the length direction, and a groove portion 7 is formed at one end side in the length direction of the second side surface portion 32. However, the hole 6 may be formed at the other end in the length direction. In addition, the first side surface portion 31 and the second side surface portion 32 are merely identifications of two opposing side surfaces of the lower frame 3, and the first side surface portion 31 and the second side surface portion 32 are different from each other with respect to the door end side and the door end side. The second side surface portion 32 may be replaced, and "one end edge 300, 310, 320" and "the other end edge 301, 311, 321" in the length direction may be replaced.

[B-3] Door edge side vertical frame As shown in Figure 10, the vertical frame 4 includes a surface portion 40 having a predetermined length dimension (height dimension) and width dimension, and a surface portion 40 having a predetermined length dimension (height dimension) and width dimension, and It is an elongated member having a first side surface portion 41 and a second side surface portion 42 that stand up opposite each other, and a U-shape when viewed in cross section. In the four-circumference frame 1 according to the present embodiment, the vertical frame 4 has a posture in which the surface portion 40 is a vertical surface on the door end side, and the first side surface portion 41 and the second side surface portion 42 extend from the surface portion 40 toward the door end side. (See Figure 4). In the four-periphery frame 1, the outer surface of the first side surface portion 41 and the outer surface of the second side surface portion 42 of the vertical frame 4 serve as facing surfaces. In the steel door P, the width direction of the surface portion 40 of the vertical frame 4 is the expected direction or thickness direction of the steel door P, and the length direction of the surface portion 40 is the height direction of the steel door P.

In the vertical frame 4 according to the present embodiment, one end (upper end) in the length direction (height direction) of the surface portion 40 is equal to one end (upper end portion) in the length direction (height direction) of the first side surface portion 41. It protrudes beyond the edge (upper edge) 410 and one end (upper edge) 420 in the length direction (height direction) of the second side surface portion 42, and an extending portion 40' is integrally formed therewith. The other end (lower end) in the length direction (height direction) of the surface portion 40 is connected to the other end (lower end edge) 411 in the length direction (height direction) of the first side surface portion 41 and the second side surface. It protrudes from the other end (lower edge) 421 in the length direction (height direction) of the portion 42, and an extending portion 40' is integrally formed therewith. Protrusions 8 are formed at both ends in the width direction of the extending portion 40'. A groove 9 is formed adjacent to the rear side of the protrusion 8 .

[B-4] The door end side vertical frame vertical frame 5 has a surface portion 50 having a predetermined length dimension (height dimension) and width dimension, and a first side surface rising from both ends of the surface portion 50 in the width direction in an opposing manner. It is an elongated member having a section 51, a second side surface section 52, and a U-shape when viewed in cross section. In the four-circumference frame 1 according to the present embodiment, the vertical frame 5 has a posture in which the surface portion 50 is a vertical surface on the door end side, and the first side surface portion 51 and the second side surface portion 52 extend from the surface portion 50 toward the door end side. (See Figure 4). In the four-periphery frame 1, the outer surface of the first side surface portion 51 and the outer surface of the second side surface portion 52 of the vertical frame 5 serve as facing surfaces. In the steel door P, the width direction of the surface portion 50 of the vertical frame 5 is the expected direction or thickness direction of the steel door P, and the length direction of the surface portion 50 is the height direction of the steel door P.

In the vertical frame 5 according to the present embodiment, one end (upper end) in the length direction (height direction) of the surface portion 50 is one end (upper end portion) in the length direction (height direction) of the first side surface portion 51. It protrudes from the edge (upper edge) 510 and one end (upper edge) 520 in the length direction (height direction) of the second side surface portion 52, and an extending portion 50' is integrally formed therewith. The other end (lower end) in the length direction (height direction) of the surface portion 50 is the other end (lower end edge) 511 in the length direction (height direction) of the first side surface portion 51 and the second side surface. It protrudes from the other end (lower edge 521) of the portion 52 in the length direction (height direction), and an extending portion 50' is integrally formed therewith. Protrusions 8 are formed at both widthwise ends of the extending portion 50'. A groove 9 is formed adjacent to the rear side of the protrusion 8 .

[B-5] Cross-sectional shape and dimensions of each frame material In this embodiment, the horizontal frames (upper frame 2, lower frame 3) and vertical frames 4 and 5 have the same cross-sectional shape and dimensions. That is, the surface portion 20 of the upper frame 2, the surface portion 30 of the lower frame 3, the surface portion 40 of the vertical frame 4, and the surface portion 50 of the vertical frame 5 have the same width dimension and the same thickness. The first side surface portion 21 and the second side surface portion 22 of the upper frame 2, the first side surface portion 31 and the second side surface portion 32 of the lower frame 3, the first side surface portion 41 and the second side surface portion 42 of the vertical frame 4, and the vertical frame The width dimensions (rising dimensions) of the first side surface portion 51 and the second side surface portion 52 of No. 5 are the same, and the plate thicknesses are also the same. In this specification, the thickness of the upper frame 2, lower frame 3, and vertical frames 4 and 5 is d. The thickness of the projections 8 formed on the vertical frames 4 and 5 is also d. When the four-circumference frame 1 is assembled, the first side surface 21 of the upper frame 2, the first side surface 31 of the lower frame 3, the first side surface 41 of the vertical frame 4, and the first side surface 51 of the vertical frame 5 are flush with each other. This forms the first facing surface of the four-circumference frame 1, and includes the second side surface portion 22 of the upper frame 2, the second side surface portion 32 of the lower frame 3, the second side surface portion 42 of the vertical frame 4, and the vertical frame 5. The second side surface portions 52 of the four-periphery frame 1 are flush with each other and form the second facing surface of the four-circumference frame 1.

[C] Latch receiver formed on the horizontal frame The longitudinal ends of the horizontal frames (upper frame 2, lower frame 3) and the longitudinal ends of the vertical frames 4, 5 are connected to the vertical frames 4, 5. The respective protrusions 8 projecting on both sides in the width direction of the extension parts 40' and 50' extending from the lengthwise ends of the face parts 40 and 50 are connected to the first side face part 21 and the second side face part of the upper frame 2. 22, the first side surface portion 31 and the second side surface portion 32 of the lower frame 3 are connected by being engaged with the hole portion 6 and the groove portion 7 which are formed oppositely at the longitudinal ends thereof, respectively. That is, the hole portion 6 and the groove portion 7 are locking receiving portions into which the protrusion 8 is locked. In this specification, the protrusion 8 that engages with the hole 6 is referred to as a first protrusion 8, the protrusion 8 that engages with the groove 7 as a second protrusion 8, and the groove 9 adjacent to the first protrusion 8 is referred to as a first protrusion 8. It should be noted that the groove 9 adjacent to the first groove 9 and the second protrusion 8 may be referred to as a second groove 9 .

[C-1] Hole In this embodiment, the holes 6 formed at both lengthwise ends of the first side surface portion 21 of the upper frame 2 and the first side surface portion 31 of the lower frame 3 are round holes of a perfect circle. It is. As shown in FIG. 8, the dimension in the width direction of the hole 6 (diameter in the case of a round hole) is L1. A dimension D1 (=L1) of the hole 6 in the direction perpendicular to the width direction is larger than the thickness d of the protrusion 8. In the first side surface portion 21 of the upper frame 2, the hole portion 6 is formed at a position on the side away from the surface portion 20 of the upper frame 2 (first side surface portion) with respect to the widthwise center of the first side surface portion 21. 21 (closer to the side edge 212). In the first side surface portion 31 of the lower frame 3, the position where the hole portion 6 is formed is on the side away from the surface portion 30 of the lower frame 3 (first side surface portion) with respect to the widthwise center of the first side surface portion 31. 31 (closer to the side edge 312). In the first side surface portion 21 of the upper frame 2 and the first side surface portion 31 of the lower frame 3, the widthwise dimension of the portions 21A and 31A between the hole portion 6 and the side edges 212 and 312 is defined as L2. Although the hole 6 according to the present embodiment is a round hole, the shape of the hole 6 is not limited to a round hole as long as the projection 8 can be locked therein. For example, the shape of the hole 6 is not limited to a round hole. Alternatively, the lock receiving portion may be a groove portion.

[C-2] Groove In this embodiment, the opening of the groove 7 formed at both longitudinal ends of the second side surfaces 22 and 32 of the upper frame 2 and lower frame 3 is the same as the length of the second side surface 22. They are formed at the directional edges 220, 221 and the longitudinal edges 320, 321 of the second side surface portion 32. FIG. 9 shows an enlarged view of the groove portion 7 formed on one side of the second side surface portions 22 and 32 of the upper frame 2 and the lower frame 3 in the length direction. The groove portion 7 includes a locking receiving portion 70 located opposite to the hole portion 6 formed in the first side surface portions 21 and 31, and a locking receiving portion 70 that extends from the locking receiving portion 70 to the edges 220 and 321 of the second side surface portions 22 and 32. The opening of the groove part 7 is formed at the end edges 220, 321 of the second side parts 22, 32.

The locking receiving part 70 has a bottom edge 700 located farthest from the opening of the groove part 7, a first side edge 701 on the side closer to the surface parts 20 and 30, and a second side edge on the side closer to the side edges 222 and 322. 702, which has a substantially rectangular shape in plan view, and corner portions 703 are formed at both ends in the width direction at a portion communicating with the guide portion 71. The widthwise dimension of the locking receiving portion 70 is assumed to be L3. The dimension L3 is the dimension between the first side edge 701 and the second side edge 702 of the locking receiving part 70. The depth dimension D2 of the locking receiving portion 70 is larger than the plate thickness d of the protrusion 8. The widthwise dimension L3 of the lock receiving portion 70 is larger than the depth dimension D2.

The guide portion 71 includes a first side edge of the upper frame 2 and the lower frame 3 closer to the surface portions 20 and 30, and a second side edge of the second side surface portion 22 and the second side surface portion 32 closer to the side edges 222 and 322. It has side edges and. The first side edge extends from the end edges 220, 321 of the second side surface parts 22, 32 toward the locking receiving part 70, in parallel to the side edges 222, 322 of the second side surface parts 22, 32, the upper frame 2, This is an edge 72 extending in the length direction of the lower frame 3. One corner 703 of the locking receiver 70 is formed at the end on the back side of the edge 72 . The second side edge includes a first portion 73 extending parallel to the side edges 222, 322 of the second side portions 22, 32 from the end edges 220, 321 of the second side portions 22, 32, and a rear side of the first portion 73. a second portion 74 that extends in an inclined manner from the end of the second portion 74 toward the back toward the edge 72; and a third portion 75 that extends parallel to the edge 72 from the end of the second portion 74 on the back side. , consists of. The other corner portion 703 of the locking receiving portion 70 is formed at the rear end of the third portion 75 of the second side edge.

The guide part 71 consists of a first part 71A on the opening side and a second part 71B on the back side (closer to the locking receiving part 70), and the width of the guide part 71 is wide on the opening side and narrow on the back side. ing. The width dimension of the first portion 71A of the guide portion 71 becomes narrower toward the back due to the inclined second portion 74 on the second side edge. The second portion 71B of the guide portion 71 is adjacent to the lock receiving portion 70, and a corner portion 703 is formed at the rear end of the second portion 71B. The width dimension of the opening of the guide portion 71 of the groove portion 7 is assumed to be L4. Dimension L4 is the dimension between the first side edge (edge 72) and the first portion 73 of the second side edge. The width dimension of the second portion 71B of the guide portion 71 of the groove portion 7 is assumed to be L5. Dimension L5 is the dimension between the first side edge (edge 72) and the third portion 75 of the second side edge. In this embodiment, dimension L3 and dimension L4 are larger than dimension L5, and dimension L3 and dimension L4 are substantially the same.

In the second side surface portion 22 of the upper frame 2, the groove portion 7 is formed at a position on the side away from the surface portion 20 of the upper frame 2 (second side surface portion 22) with respect to the widthwise center of the second side surface portion 22. The position is slightly offset to the side (closer to the side edge 222). In the second side surface portion 32 of the lower frame 3, the groove portion 7 is formed at a position on the side away from the surface portion 30 of the lower frame 3 (second side surface portion 32) with respect to the widthwise center of the second side surface portion 32. The position is slightly offset to the side (closer to the side edge 322). In the second side surface portion 22 of the upper frame 2 and the second side surface portion 32 of the lower frame 3, in the width direction of the portion between the second side edge 702 of the lock receiving portion 70 of the groove portion 7 and the side edges 222, 322. Let the dimension be L6. In the second side surface portion 22 of the upper frame 2 and the second side surface portion 32 of the lower frame 3, the width of the portion between the third portion 75 of the second side edge of the guide portion 71 of the groove portion 7 and the side edges 222, 322 Let the dimension in the direction be L7. Dimension L7 is larger than dimension L6. That is, in the second side surface portion 22 of the upper frame 2 and the second side surface portion 32 of the lower frame 3, the groove portion 7 (the second side edge 702 of the lock receiving portion 70, the second side edge of the guide portion 71) and the side edge The maximum width dimension of the portions 22A and 32A between the portions 222 and 322 is L7.

[D] Projections and grooves formed on the vertical frame As shown in FIG. ing. The protrusion 8 has a trapezoidal shape in plan view, and has a protruding edge 80 extending in the length direction of the vertical frame 4 and a protruding edge 80 extending perpendicularly to the protruding edge 80 from the rear end of the protruding edge 80 in the width direction of the vertical frame 4. It includes a first side edge 81 extending, and a second side edge 82 extending obliquely from the front end of the protruding edge 80 toward the longitudinal edge of the vertical frame 4 (the tip side of the extending portion 40'). ing. A groove 9 is formed adjacent to the rear side of the projection 8, and a bottom edge 90 of the groove 9 extends in the length direction of the vertical frame 4. A tip edge 400' of the extension part 40' extends in the width direction of the vertical frame 4 so as to connect the tips of the inclined second side edges 82 of each protrusion 8 at both ends of the extension part 40' in the width direction. The leading edge 400' extends perpendicularly (perpendicularly) to the length direction of the vertical frame 4. The leading edge 400' forms an edge of the vertical frame 4 in the length direction. The extending portion 40' includes protruding edges 80, 80 on both sides in the width direction, first side edges 81, 81, second side edges 82, 82, bottom edges 90, 90, and a tip edge 400'. .

The groove 9 is formed adjacent to the rear side of the protrusion 8 , and the first side edge rising from the front end of the bottom edge 90 of the groove 9 is the first side edge 81 of the protrusion 8 . At the lengthwise (heightwise) ends of the surface portion 40 of the vertical frame 4, edges 410, 411 of the first side surface portion 41, edges 420, 421 of the second side surface portion 42 are provided at both ends in the width direction. In the groove 9 formed in the vertical frame 4, the second side edge 91 rising from the rear end of the bottom edge 90 of the groove 9 is the edge of the first side surface portion 41. 410, 411, end edges 420, 421 of the second side surface portion 42, and the end edge 92 of the surface portion 40, respectively.

The dimension W1 between the bottom edge 90 of the first groove 9 and the bottom edge 90 of the second groove 9 (width dimension on the base end side of the extending portion 40') is smaller than the width dimension W2 of the vertical frame 4 ( (See Figure 10). Specifically, it is smaller by the height of the second side edge 91 of the first groove 9 + the height of the second side edge 91 of the second groove 9 . The dimension W3 between the protruding edge 80 of the first protrusion 8 and the protruding edge 80 of the second protrusion 8 (maximum width dimension of the extending portion 40') is approximately the same as the width dimension W2 of the vertical frame 4. , in this embodiment, is slightly smaller than the width dimension of the vertical frame 4 (that is, the upper frame 2 and the lower frame 3) (FIG. 11).

The protrusions 8 formed at both widthwise ends of the extending portion 50' of the vertical frame 5 protrude in the width direction of the vertical frame 5. The protrusion 8 has a trapezoidal shape in plan view, and has a protruding edge 80 extending in the length direction of the vertical frame 5 and a protruding edge 80 extending perpendicularly to the protruding edge 80 from the rear end of the protruding edge 80 in the width direction of the vertical frame 5. It includes a first side edge 81 that extends, and a second side edge 82 that extends obliquely from the front end of the protruding edge 80 toward the longitudinal edge of the vertical frame 5 (the tip side of the extending portion 50'). ing. A groove 9 is formed adjacent to the rear side of the projection 8, and a bottom edge 90 of the groove 9 extends in the length direction of the vertical frame 5. A tip edge 500' of the extending portion 50' extends in the width direction of the vertical frame 5 so as to connect the tips of the inclined second side edges 82 of each protrusion 8 at both widthwise ends of the extending portion 50'. The leading edge 500' extends perpendicularly (perpendicularly) to the length direction of the vertical frame 5. The leading edge 500' forms an edge of the vertical frame 5 in the length direction. The extending portion 50' includes protruding edges 80, 80 on both sides in the width direction, first side edges 81, 81, second side edges 82, 82, bottom edges 90, 90, and a tip edge 500'. .

The groove 9 is formed adjacent to the rear side of the protrusion 8 , and the first side edge rising from the front end of the bottom edge 90 of the groove 9 is the first side edge 81 of the protrusion 8 . At the lengthwise (heightwise) ends of the surface portion 50 of the vertical frame 5, edges 510 and 511 of the first side surface portion 51 and edges 520 and 521 of the second side surface portion 52 are provided at both ends in the width direction. In the groove 9 formed in the vertical frame 5, the second side edge 91 rising from the rear end of the bottom edge 90 of the groove 9 is the edge of the first side surface portion 51. 510 and 511, and end edges 520 and 521 of the second side surface portion 52, respectively, and the end edge 92 of the surface portion 50 are integrally formed.

The dimension W1 between the bottom edge 90 of the first groove 9 and the bottom edge 90 of the second groove 9 (width dimension on the base end side of the extending portion 50') is smaller than the width dimension W2 of the vertical frame 5 (Fig. 10). Specifically, it is smaller by the height of the second side edge 91 of the first groove 9 + the height of the second side edge 91 of the second groove 9 . The dimension W3 between the protruding edge 80 of the first protrusion 8 and the protruding edge 80 of the second protrusion 8 (maximum width dimension of the extending portion 50') is approximately the same as the width dimension W2 of the vertical frame 5. , in this embodiment, is slightly smaller than the width dimension of the vertical frame 5 (that is, the upper frame 2 and the lower frame 3) (see FIGS. 11 and 18).

The protrusion 8 has a protruding edge 80 at the tip, a first side edge 81, a second side edge 82, a first surface portion 83 (part of the inner surface of the extending portion 40' and the extending portion 50'), and A two-sided part 84 (a part of the outer surface of the extending part 40' and the extending part 50') is provided. As shown in FIG. 12, the width dimension of the protruding edge 80 of the protrusion 8 is L8. The protruding edge 80 of the protrusion 8 has a rectangular shape with an area of L8 x plate thickness d. The dimension between the first side edge 81 and the second side edge 82 of the protrusion 8 is defined as L9. L9 is the width dimension of the protrusion 8, and the width dimension L9 of the protrusion 8 changes depending on the position of the second side edge 82, which is the inclined edge. That is, the width dimension L9 of the protrusion 8 increases as the distance from the protrusion edge 80 increases. The cross section of the protrusion 8 is a rectangular shape with an area of L9×plate thickness d. The cross section of the protrusion 8 becomes larger as it moves away from the protruding edge 80. The rising dimension of the protrusion 8 is assumed to be L10. The dimension L10 is the height dimension of the first side edge 81, which is a vertical edge, and is also the distance between the bottom edge 90 of the groove 9 and the protruding edge 80 of the protrusion 8. The width dimension of the groove 9 is assumed to be L11. The dimension L11 is the dimension between the first side edge 81 of the protrusion 8 and the second side edge 91 of the groove 9. The rising dimension L10 of the protrusion 8 (the depth dimension of the groove 9) is larger than the plate thickness d.

[E] Relationship between the dimensions of the protrusion and the locking receiver [E-1] Relationship between the dimensions of the protrusion and the hole The dimension L1 in the width direction of the hole 6 is determined by inserting the first protrusion 8 into the hole 6. The size is such that it can be locked in the hole 6, and is larger than the width L8 of the protruding edge 80 of the protrusion 8. The hole 6 is larger than the rectangular area (L8×plate thickness d) of the protruding edge 80 of the protrusion 8. Furthermore, the dimension L1 in the width direction of the hole 6 is larger than the width L9 of a portion separated from the protruding edge 80 of the protrusion 8 by the plate thickness d (d is also the depth dimension of the hole 6). The portion 6 is larger than the cross section of the protrusion 8 (width dimension L9 x plate thickness d). By doing this, the protrusion 8 can be inserted until the protruding edge 80 of the tip reaches at least the outer edge of the hole 6 (the outer surface of the first side surface 21, the outer surface of the first side surface 31), and the main In the embodiment, the protruding edge 80 of the protrusion 8 can protrude beyond the outer surface of the first side surface portion 21 and the outer surface of the first side surface portion 31 (see FIG. 15).

In the first side surface portion 21 of the upper frame 2 and the first side surface portion 31 of the lower frame 3, the widthwise dimension L2 of the portions 21A and 31A between the hole portion 6 and the side edges 212 and 312 is the same as that of the groove 9. It is smaller than the width dimension L11, so that when the protrusion 8 is inserted into the hole 6, the portions 21A and 31A are accommodated in the groove 9. In this embodiment, when the protrusion 8 is inserted into the hole 6, the parts 21A and 31A come into contact with the bottom edge 90 of the groove 9, thereby restricting further insertion of the protrusion 8 into the hole 6 (Fig. 15 reference).

In this embodiment, when the protrusion 8 is inserted most deeply into the hole 6, the protruding edge 80 at the tip of the protrusion 8 protrudes from the outer surface of the first side parts 21, 31, and the first side edge 81 of the protrusion 8 and The second side edge 82 is arranged to be close to or in contact with the peripheral edge of the hole 6. In this state, the width L9 of the protrusion 8 is approximately the same as the width L1 of the hole 6 at the inner edge (inner surface side) of the hole 6, or is slightly smaller.

When the protrusion 8 of the vertical frame 4 or 5 is inserted into the hole 6 of the upper frame 2 or the lower frame 3 and locked, there is a clearance between the protrusion 8 and the hole 6, and the hole 6 (first protrusion 8 ), the vertical frames 4 and 5 are rotatable relative to the upper frame 2 and the lower frame 3. The vertical frames 4 and 5 are aligned with respect to the upper frame 2 to the lower frame 3 with the virtual axis A (see FIG. 15, axis along the Y axis in FIGS. 13 and 15) extending in the width direction of the hole 6 as the center. It is rotatable.

[E-2] Relationship between the dimensions of the protrusion and the groove part With the first protrusion 8 deeply inserted into the hole 6, rotate the vertical frames 4 and 5, and move the second protrusion 8 along the guide part 71 of the groove part 7. The dimension L5 of the second portion 71B of the guide portion 71 is a dimension that allows the second protrusion 8 to pass when the second portion 71B of the guide portion 71 is moved. That is, when the first projection 8 is deeply inserted into the hole 6, the width L9 of the second projection 8 at the inner edge (inner surface side) of the groove 7 is smaller than the dimension L5 of the second portion 71B of the guide portion 71. (See Figure 16).

In the second side surface portion 22 of the upper frame 2 and the second side surface portion 32 of the lower frame 3, the dimension L7 ( The maximum width of the portions 22A and 32A between the second side edge and the side edges 222 and 322 of the groove 7 is smaller than the width L11 of the second groove 9, and the second protrusion 8 is a guide of the groove 7. When guided by the portion 71, the portions 22A, 32A are allowed to move within the second groove 9 (see FIG. 16).

With the second protrusion 8 moved along the guide part 71 of the groove 7 to the locking receiver 70 (see FIG. 17), push the second protrusion 8 a little into the locking receiver 70 (see FIG. (see 18). At this time, the amount of insertion of the first protrusion 8 into the hole 6 becomes a little shallower, but the locked state between the first protrusion 8 and the hole 6 is maintained. In this state, the width dimension L9 of the other second protrusion 8 at the inner edge of the groove portion 7 is larger than the dimension L5 of the second portion 71B of the guide portion 71. Rotation of the vertical frames 4 and 5 relative to the upper frame 2 and lower frame 3 from the hole 6 (first protrusion 8) is performed when the second protrusion 8 is attached to one or both of the corner portions 703 of the lock receiving portion 70. It is regulated by contact. That is, the corner portion 703 of the lock receiving portion 70 functions as a locked portion.

The movement of the vertical frames 4 and 5 in the length direction with respect to the upper frame 2 and the lower frame 3 is such that the first protrusion 8 comes into contact with the periphery of the hole 6, and the second protrusion 8 contacts the periphery of the hole 6. It is regulated by coming into contact with the first side edge 701 or the second side edge 702 of 70. Note that the locked state of the first protrusion 8 with respect to the hole 6 is maintained unless the first protrusion 8 is pulled out from the hole 6; In this state, the movement of the first protrusion 8 in the direction of pulling it out from the hole 6 is caused by the parts 22A, 32A coming into contact with the bottom edge 90 of the second groove 9, or/and the second protrusion 8 moving towards the opening of the groove 7. It is regulated by coming into contact with the inner edge (inner side) of. In this embodiment, when the first protrusion 8 is engaged with the hole 6 and the second protrusion 8 is engaged with the engagement receiving part 70 of the groove 7, the vertical frames 4 and 5 are connected to the upper frame 2 and the lower frame. There is a slight play that allows the frame 3 to move in the forward direction, and in this embodiment, the protruding edge 80 at the tip of the second protrusion 8 is slightly moved away from the outer surface of the second side surface 22 and the second side surface 32. Although it is movable to the extent that it protrudes, at this time, the first protrusion 8 and the hole 6 are kept in a locked state.

[E-3] Relationship of other dimensions The protrusion dimension of the extension part 40' of the vertical frame 4 and the protrusion dimension of the extension part 50' of the vertical frame 5 are the same as those of the first side surface part 21 and the second side surface of the upper frame 2. portion 22, the first side surface portion 31 and the second side surface portion 32 of the lower frame 3, the first side surface portion 41 and the second side surface portion 42 of the vertical frame 4, the first side surface portion 51 and the second side surface portion 52 of the vertical frame 5 The width dimension (rising dimension) is approximately the same as that of the extension part, and when the first protrusion 8 is engaged with the hole 6 and the second protrusion 8 is engaged with the engagement receiving part 70 of the groove part 7, the extension part The leading edge 400' of the extending portion 40' and the leading edge 500' of the extending portion 50' are close to the inner surface of the surface portion 20 of the upper frame 2 and the inner surface of the surface portion 30 of the lower frame 3 (see FIGS. 6 and 18). .

The maximum width dimension of the extending portion 40' of the vertical frame 4 and the extending portion 50' of the vertical frame 5 (dimension W3 between the protruding edges 80 of the protrusions 8) is the width dimension of the upper frame 2 and the lower frame 3 (the The dimension between the outer surfaces of the first side surface section 21 and the second side surface section 22 is approximately the same as the dimension between the outer surfaces of the first side surface section 31 and the second side surface section 32), and in this embodiment, the upper frame 2 and the lower frame 3 (see FIG. 18). That is, a four-circumference frame 1 is assembled from the upper frame 2, the lower frame 3, and the vertical frames 4 and 5, and the first side surface 21 of the upper frame 2, the first side surface 31 of the lower frame 3, and the first side surface of the vertical frame 4 are assembled. 41 , the outer surface of the first side surface portion 51 of the vertical frame 5 , the second side surface portion 22 of the upper frame 2 , the second side surface portion 32 of the lower frame 3 , the second side surface portion 42 of the vertical frame 4 , the outer surface of the first side surface portion 51 of the vertical frame 5 When the outer surfaces of the two side surfaces 52 are flush with each other, the protruding edge 80 of the first protrusion 8 is located inside the hole 6, and the first side surface 21 of the upper frame 2 and the first side surface of the lower frame 3 It does not protrude from the outer surface of the side surface portion 31, the first side surface portion 41 of the vertical frame 4, and the first side surface portion 51 of the vertical frame 5, and the protruding edge 80 of the second protrusion 8 is connected to the locking receiving portion 70 of the groove portion 7. The second side surface 22 of the upper frame 2, the second side surface 32 of the lower frame 3, the second side surface 42 of the vertical frame 4, and the second side surface 52 of the vertical frame 5 protrude from the outer surface. There's nothing to do.

[F] Assembly method and structure of four-circumference frame [F-1] Method of connecting horizontal frame and vertical frame Referring to Figures 13 to 18, assemble the horizontal frame (upper frame 2, lower frame 3) and vertical frame 4, 5. The method of connecting the ends of each will be explained. Here, the length direction of the horizontal frame (upper frame 2, lower frame 3) is the X direction, the width direction of the horizontal frame (upper frame 2, lower frame 3) is the Z direction, and the direction perpendicular to the X direction and the Z direction is The Y direction is the length direction of the vertical frames 4 and 5, the z direction is the width direction of the vertical frames 4 and 5, and the x direction is the direction orthogonal to the y direction and the z direction. When the ends of the horizontal frames (upper frame 2, lower frame 3) and vertical frames 4 and 5 are connected, the X direction of the horizontal frames (upper frame 2, lower frame 3) and the y direction of the vertical frames 4 and 5 are perpendicular to each other, and the Z direction of the horizontal frames (upper frame 2, lower frame 3) matches the Z direction of the vertical frames 4 and 5. That is, in the four-circumference frame 1, the horizontal frames (upper frames 2 and 3) extend in the X direction, the vertical frames 4 and 5 extend in the Y direction, and the horizontal frames (upper frame 2 and lower frame 3) and the vertical frames 4 and 5 extend in the Y direction. The width direction of is the Z direction, and the Z direction is the expected direction of the four-circumference frame 1.

First, insert the first protrusion 8 of the vertical frame 4 or 5 into the hole 6 of the upper frame 2 or the lower frame 3, and when inserting the vertical frame 4 or 5, place it in an inclined position (the second protrusion 8 relative to the first protrusion 8). (the upper figure of Fig. 13). In the inclined posture of the vertical frames 4 or 5, the second protrusion 8 is located at least above the opening of the groove 7 of the upper frame 2 or lower frame 3 (middle diagram in FIG. 13).
In the upper and middle figures of FIG. The Z direction is inclined with respect to the Z direction of the upper frame 2 to the lower frame 3.

To rotate the vertical frame 4 or 5 in an inclined position downward about the hole 6 (first projection 8) while maintaining the locked state in which the first projection 8 is inserted into the hole 6. By inserting the second protrusion 8 of the vertical frame 4 or 5 into the guide part 71 from the opening of the groove part 7 of the upper frame 2 or lower frame 3 and moving it along the guide part 71 to the lock receiving part 70 ( By rotating the vertical frames 4 or 5 so that the Z direction matches the Z direction of the upper frame 2 or lower frame 3), the second protrusion 8 is locked in the lock receiving part 70 of the groove 7 (see FIG. 13 below).

In this connection process, for example, the worker holds the upper frame 2 or lower frame 3 with his left hand, turns the longitudinal end of the upper frame 2 or lower frame 3 upward, and holds the vertical frame 4 or 5 with his right hand. Then, insert the first protrusion 8 of the vertical frame 4 or 5 into the hole 6 of the upper frame 2 or lower frame 3, and while maintaining the locked state between the first protrusion 8 and the hole 6, insert the first protrusion 8 of the vertical frame 4 or 5 into the hole 6 (the first Rotate the vertical frames 4 or 5 downward using the protrusion 8) as a reference point, insert the second protrusion 8 of the vertical frame 4 or 5 into the guide part 71 from the opening of the groove 7 of the upper frame 2 or lower frame 3, This is carried out by moving along the guide section 71 to the lock receiving section 70.

FIG. 14 shows the connection structure of the end of the upper frame 2 and the end of the vertical frame 5 obtained in the process of FIG. 13 rotated by 90 degrees (XYZ coordinate system of FIG. 13 and XYZ coordinate system of FIG. 14). (see system). FIG. 14 is a partially enlarged view of a corner of the four-circumference frame 1 in FIG. 2. FIG.

A method for connecting the ends of the horizontal frames (upper frame 2, lower frame 3) and the ends of the vertical frames 4 and 5 will be described in more detail with reference to FIGS. 15 to 18. 15 to 18 representatively show the process of connecting the upper frame 2 and the vertical frame 5. 15 corresponds to the middle diagram in FIG. 13, FIGS. 16 and 17 correspond to the process from the middle diagram in FIG. 13 to the bottom diagram in FIG. 13, and FIG. 18 corresponds to the bottom diagram in FIG. Compatible.

In FIG. 15, the first protrusion 8 of the vertical frame 5 is inserted into the hole 6 of the first side surface 21 of the upper frame 2, and the protruding edge 80 at the tip of the first protrusion 8 is It protrudes beyond the outer surface of the first side surface portion 21. The upper frame 2 is in an inclined position with the second protrusion 8 raised from the hole 6 (first protrusion 8), and the tip side of the second protrusion 8 is above the opening of the groove 7 of the upper frame 2. positioned. In FIG. 15, the length direction (X direction) of the upper frame 2 and the length direction (y direction) of the vertical frame 5 are perpendicular to each other, but the z direction of the vertical frame 5 is different from the Z direction of the upper frame 2. It's sloped.

FIG. 15 illustrates a state in which the first protrusion 8 is inserted most deeply into the hole 6, and the portion 21A of the first side surface portion 21 is in contact with the bottom edge 90 of the groove 9. The side edge 212 of the first side surface portion 21 and the second side edge 91 of the groove 9 are spaced apart from each other. A first side edge 81 of the first protrusion 8 is close to or in contact with the peripheral edge of the hole 6 , and a second side edge 82 is close to or in contact with the inner edge of the hole 6 . When the first protrusion 8 is inserted into the hole 6 and locked, there is a clearance between the first protrusion 8 and the hole 6, and the vertical frame 5 is raised from the hole 6 (first protrusion 8). It is rotatable relative to the frame 2. The vertical frame 5 is rotatable with respect to the upper frame 2 around a virtual axis A extending in the width direction (Y direction) of the first side surface portion 21 (hole portion 6). In FIG. 15 (also in FIGS. 16 and 17), the outer surface of the first side surface portion 21 of the upper frame 2 and the outer surface of the first side surface portion 51 of the vertical frame 5 do not match, but are shifted, and the upper frame 2 The outer surface of the second side surface portion 22 of the vertical frame 5 and the outer surface of the second side surface portion 52 of the vertical frame 5 do not match and are shifted.

FIG. 16 shows a state in which the vertical frame 5 is rotated from the state shown in FIG. 15 and the second protrusion 8 is moved from the opening of the groove 7 to the second portion 71B of the guide part 71. In FIG. 16, the Z direction of the vertical frame 5 is inclined with respect to the Z direction of the upper frame 2, but the inclination is gentler than in the state shown in FIG. The depth of insertion of the first protrusion 8 into the hole 6 is the same as in the state shown in FIG. A small portion of the tip of the second protrusion 8 is located within the second portion 71B of the guide portion 71. That is, the width L9 of the second protrusion 8 along the inner surface of the second side surface portion 22 is smaller than or the same as the width L5 of the second portion 71B. A portion 22A of the second side surface portion 22 is located within the groove 9, and the side edge 222 of the second side surface portion 22 and the second side edge 91 of the groove 9 are spaced apart.

FIG. 17 shows a state in which the vertical frame 5 is rotated from the state shown in FIG. 16 and the second protrusion 8 is moved from the second portion 71B of the guide portion 71 of the groove portion 7 to the lock receiving portion 70. In FIG. 17, the Z direction of the vertical frame 5 coincides with the Z direction of the upper frame 2. The depth of insertion of the first protrusion 8 into the hole 6 is the same as in the state shown in FIG. In the state shown in FIG. 17 , a small portion of the tip of the second protrusion 8 is located within the locking receiving portion 70 . The width dimension L9 along the inner surface of the second side surface portion 22 of the second protrusion 8 is the same as in the state shown in FIG. 16 . A portion 22A of the second side surface portion 22 is located within the groove 9, and the side edge 222 of the second side surface portion 22 and the second side edge 91 of the groove 9 are spaced apart.

FIG. 18 shows a state in which the second protrusion 8 is pushed into the lock receiving part 70 of the groove part 7 from the state shown in FIG. That is, from the state shown in FIG. 17, the vertical frame 5 is moved toward the second side surface portion 22 with respect to the upper frame 2, and the outer surface of the first side surface portion 21 of the upper frame 2 and the first side surface portion 51 of the vertical frame 5 are moved. The outer surface of the second side surface 22 of the upper frame 2 and the outer surface of the second side surface 52 of the vertical frame 5 are shown flush with each other.

Compared to the state shown in FIG. 17, the tip of the second protrusion 8 is located deeper within the locking receiver 70, and the width L9 of the second protrusion 8 along the inner surface of the second side surface 22 is It is larger than the state of , and larger than the width L5 of the second portion 71B. Although the insertion depth of the first protrusion 8 into the hole 6 is shallower than in the state shown in FIG. 17, the locked state between the first protrusion 8 and the hole 6 is maintained.

In the state shown in FIG. 18, the width L9 of the second protrusion 8 along the inner surface of the second side surface 22 is larger than the width L5 of the second portion 71B. Rotation of the vertical frame 5 with the (first protrusion 8) as a base point is regulated by the second protrusion 8 coming into contact with one or both of the corners 703 of the lock receiving part 70. In addition, in the state shown in FIG. 18, when the vertical frame 5 moves in the length direction (vertical direction) with respect to the upper frame 2, the second protrusion 8 Or it is regulated by coming into contact with both.

When the first protrusion 8 is engaged with the hole 6 and the second protrusion 8 is engaged with the engagement receiving part 70 of the groove 7, the upper frame 2 and the vertical frame 5 have a play that allows them to move slightly in the forward direction. There is. The upper frame 2 and the vertical frame 5, whose ends are locked together, can take a first state (FIG. 17) and a second state (18). As shown in FIG. 17, in the first state, the first protrusion 8 is deeply inserted into the hole 6, the second protrusion 8 is shallowly inserted into the locking receiving part 70, and the facing surface of the upper frame 2 ( The outer surface of the first side surface 21, the outer surface of the second side surface 22) and the facing surface of the vertical frame 5 (the outer surface of the first side surface 51, the outer surface of the second side surface 52) are misaligned. As shown in FIG. 18, in the second state, the first protrusion 8 and the second protrusion 8 are inserted into the hole 6 and the locking receiving part 70 at approximately equal depths (the second protrusion 8 is (It is inserted deeper into the locking receiving part 70 than in the first state), and the facing surface of the upper frame 2 and the facing surface of the vertical frame 5 are flush with each other.

In the second state, the rotation of the vertical frame 5 with respect to the upper frame 2 from the hole 6 (first protrusion 8) of the vertical frame 5 is such that the second protrusion 8 Or it is regulated by coming into contact with both. In order to release the second protrusion 8 of the vertical frame 5 from the lock receiving part 70 of the groove 7 of the upper frame 2, move the vertical frame 5 in the direction of projection with respect to the upper frame 2. Since two steps are required: returning the vertical frame 5 from the second state to the first state, and then rotating the vertical frame 5 upward from the hole 6 (first protrusion 8) in the first state, The frame 2 and the vertical frame 5 are connected in such a way that they cannot be easily separated.

[F-2] Assembly structure of four-circumference frame The door end side end of the upper frame 2 and the upper end of the door end side vertical frame 4, the door end side end of the upper frame 2 and the upper end of the door end side vertical frame 5, By fitting the door end side end of the lower frame 3 and the lower end of the door end side vertical frame 4, and the door end side end of the lower frame 3 and the lower end of the door end side vertical frame 5, as shown in FIG. A four-circumference frame 1 shown in FIG. 6 is formed. In the assembled state of the four-circumference frame 1, the upper frame 2 and the vertical frames 4, 5, the lower frame 3 and the vertical frames 4, 5 are in the second state, and the first side surface 21 of the upper frame 2, the lower The outer surfaces of the first side surface portion 31 of the frame 3, the first side surface portion 41 of the vertical frame 4, and the first side surface portion 51 of the vertical frame 5 are flush with each other to form a first facing surface of the four-periphery frame 1, The outer surfaces of the second side surface portion 22 of the upper frame 2, the second side surface portion 32 of the lower frame 3, the second side surface portion 42 of the vertical frame 4, and the second side surface portion 52 of the vertical frame 5 are flush with each other, forming a four-circumference frame. A second facing surface of 1 is formed.

In this embodiment, the surface portion 20 of the upper frame 2 is the upper end surface of the four-circumference frame 1, and the surface portion of the lower frame 3 is the lower end surface of the four-circumference frame 1. In the door end side portion of the four-perimeter frame 1, the side edge 412 of the first side surface portion 41 and the side edge 422 of the second side surface portion 42 of the door end side vertical frame 4 are the door end side end edge of the upper frame 2, and the lower frame. It protrudes beyond the edge of the door tip in No. 3. At the door end side portion of the four-circumference frame 1, the outer surface of the surface portion 50 of the door end side vertical frame 5 does not protrude beyond the door end side edge of the upper frame 2 and the door end side edge of the lower frame 3. In the four-circumference frame 1, the orientations of the frames 2, 3, 4, and 5 shown in FIGS. The direction of the frame 3 may be reversed.

The four-circumference frame 1 in this embodiment can be assembled by simply fitting the ends of the upper frame 2, lower frame 3, and vertical frames 4 and 5, and there is no need to use welding or screws. To connect the upper frame 2 or lower frame 3 and the vertical frames 4 or 5, insert the first protrusion 8 of the vertical frame 4 or 5 into the hole 6 of the upper frame 2 or lower frame 3, and then insert the vertical frame 4 or 5 into the hole. By rotating the part 6 (first protrusion 8) as a reference point, the second protrusion 8 is inserted into the lock receiving part 70 from the opening of the groove part 7 of the upper frame 2 or lower frame 3 through the guide part 71, and vertically This can be done by a series of operations in which the frames 4 and 5 are slightly shifted in the projected direction, and the workability is better than assembly by welding or assembly by screws, and the manufacturing efficiency in the factory is also improved.

In the second state in which the four-circumference frame 1 is assembled, there is some play in each connecting part, but the second protrusion 8 and the locking receiving part 70 of the groove part 7 are not easily disengaged from each other. Further, as long as the second protrusion 8 and the locking receiving portion 70 are kept locked, the locking state between the first projection 8 and the hole 6 will not be released. When you lift up the four-circle frame 1 by holding either the upper frame 2, the lower frame 3, or the vertical frame 4 or 5, the state of the four-circle frame 1 assembled in a four-circle shape is maintained, and the four-circle frame 1 can be moved. Since it is easy to transport, it is easy to manufacture steel doors using the four-circumference frame 1, and the four-circumference frame 1 is also easy to store.

[F-3] Manufacture of steel door As shown in FIGS. 2 to 4, the four-circumference frame 1 is constructed by pasting the first surface material 10 and the second surface material 11 to the four-circumference frame 1. A steel door P is obtained by fixing the positions of the upper frame 2, lower frame 3, and vertical frames 4 and 5. In the second state where the four-circumference frame 1 is assembled, there is some play in each connection part, but by pasting the first surface material 10 and the second surface material 11, the first side surface portion 21 of the upper frame 2 , the outer surfaces of the first side surface portion 31 of the lower frame 3, the first side surface portion 41 of the vertical frame 4, and the first side surface portion 51 of the vertical frame 5 are flush with each other, and the second side surface portion 22 of the upper frame 2, the bottom The flush state of the outer surfaces of the second side surface portion 32 of the frame 3, the second side surface portion 42 of the vertical frame 4, and the second side surface portion 52 of the vertical frame 5 is fixed.

More specifically, the surface portion 11a of the second surface material 11 is the outer surface of the second side surface portion 22 of the upper frame 2, the outer surface of the second side surface portion 32 of the lower frame 3, and the second side surface of the door edge side vertical frame 4. 42 and the outer surface of the second side surface portion 52 of the door end side vertical frame 5, the upper piece 11b of the second surface material 11 is brought into contact with the outer surface of the surface portion 20 of the upper frame 2, and the second surface material The lower piece 11c of No. 11 is brought into contact with the outer surface of the surface portion 30 of the lower frame 3. The surface portion 10a of the first surface material 10 is defined as The upper piece 10b of the first surface material 10 is adhered to the outer surface of the first side surface portion 51 of the rear vertical frame 5, and the upper piece 10b of the first surface material 10 is overlapped with the upper piece 11b of the second surface material 11 that is in contact with the outer surface of the surface portion 20 of the upper frame 2. Then, the lower piece 10c of the first surface material 10 is fixed on the lower piece 11c of the second surface material 10 that is in contact with the outer surface of the surface part 30 of the lower frame 3 by fixing it with a plurality of fixing tools S across the width direction. , is fixed with a plurality of fixing tools S across the width direction. The bent piece at the tip of the side piece 10d on the door edge side of the first surface material 10 and the bent piece at the tip of the side piece 11d on the door edge side of the second surface material 11 are brought into contact and adhered, and the first surface The bent piece at the tip of the side piece 10e on the door end side of the material 10 and the bent piece at the tip of the side piece 11e on the door end side of the second surface material 11 are brought into contact and bonded.

[G] Explanation of other embodiments of the groove section Other embodiments of the groove section 7 formed in the second side surface section 22 or the second side surface section 32 of the upper frame 2 or lower frame 3 will be described with reference to FIG. 19. do. Although FIG. 19 representatively shows a groove 7' formed at one end of the second side surface 22 of the upper frame 2, the description based on FIG. The grooves 7 formed at the ends of the grooves 7 and the grooves formed at the longitudinal ends of the second side surface 32 of the lower frame 3 can be referred to. The previously described second protrusion 8 can be locked in the groove 7'.

The groove part 7' shown in FIG. It consists of a first portion 71A' extending in the width direction and a second portion 71B' extending in the length direction. The second portion 71B' extends at an acute angle with respect to the first portion 71A' and has a "re" shape. The back side of the second portion 71B' is a locking receiving portion 70', and the second portion 71B' and the locking receiving portion 70' have the same width dimension. While rotating the vertical frame 5 about the hole 6 (first protrusion 8) with the first protrusion 8 locked in the hole 6 of the first side surface 21, the second protrusion 8 is inserted into the groove. 7' along the guide portions (first portion 71A', second portion 71B') and locking with the locking receiving portion 70', the end of the upper frame 2 and the end of the vertical frame 5 Concatenate.

The groove portion 7' shown in FIG. 19(B) has an opening formed at one end in the length direction of the side edge 222 of the second side surface portion 22, and the guide portion extends from the opening to the side edge 222 of the second side surface portion 22. It consists of a first portion 71A' extending in the width direction and a second portion 71B' extending in the length direction. The second portion 71B' extends perpendicularly to the first portion 71A', and a locking receiving portion 70' is formed adjacent to the back side of the second portion 71B'. The width dimension of the locking receiving part 70' is larger than the width dimension on the back side of the second portion 71B'. While rotating the vertical frame 5 about the hole 6 (first protrusion 8) with the first protrusion 8 locked in the hole 6 of the first side surface 21, the second protrusion 8 is inserted into the groove. 7' along the guide portions (first portion 71A', second portion 71B') and locking with the locking receiving portion 70', the end of the upper frame 2 and the end of the vertical frame 5 Concatenate.

The groove part 7' shown in FIG. 19(C) has an opening formed in the longitudinal edge 220 of the second side part 22, and the guide part 71' extends from the opening in the longitudinal direction of the second side part 22. A lock receiving portion 70' is formed adjacent to the inner side of the guide portion 71'. The width of the guide portion 71' gradually decreases from the opening toward the back side. The width dimension of the locking receiving part 70' is larger than the width dimension on the back side of the guide part 71'. While rotating the vertical frame 5 about the hole 6 (first protrusion 8) with the first protrusion 8 locked in the hole 6 of the first side surface 21, the second protrusion 8 is inserted into the groove. The ends of the upper frame 2 and the ends of the vertical frame 5 are connected by moving along the guide portion 71' of No. 7 and engaging the lock receiving portion 70'.

1 Four-circle frame 2 Upper frame (horizontal frame)
20 Surface portion 21 First side surface portion 22 Second side surface portion 222 Side edge 22A Part 3 between the groove and the side edge of the second side surface portion Lower frame (horizontal frame)
30 Surface portion 31 First side surface portion 32 Second side surface portion 322 Side edge 32A Part 4 between the groove and the side edge of the second side surface portion Vertical frame 40 Surface portion 40' Extension portion 41 First side surface portion 42 Second side surface portion 410, 411, 420, 421 Edge 5 Vertical frame 50 Surface portion 50' Extension portion 51 First side surface portion 52 Second side surface portion 510, 511, 520, 521 Edge 6 Hole portion (first locking receiving portion)
7 Groove 70 Locking receiver (second locking receiver)
71 Guide section 8 Projection 9 Concave groove L3 Width dimension L5 of the locking receiving section Width dimension L7 on the back side of the groove section 7 Maximum width dimension L9 of the region between the groove section and the side edge of the second side surface section Width dimension L11 of the projection Groove width dimension

Claims (8)

A method for assembling a four-circumference frame consisting of upper and lower horizontal frames and left and right vertical frames,
One of the horizontal frame and the vertical frame is a first frame material, and the other is a second frame material,
A first protrusion and a second protrusion are formed at the longitudinal end of the first frame member in the width direction,
A first locking receiving portion to which the first projection locks and a second locking receiving portion to which the second projection locks are formed facing each other at the longitudinal end of the second frame member. and
Inserting and locking the first protrusion of the first frame member into the first locking receiving portion of the second frame member,
While the first frame member is rotated about the first locking receiver with the first protrusion locked in the first locking receiver, the second protrusion is rotated around the second locking receiver. Lock it in the retaining part,
How to assemble the four-circumference frame of the panel. A groove portion is formed from the second lock receiving portion and the guide portion ,
The first protrusion of the first frame member is inserted into the first locking receiving portion of the second frame member to be locked, and at this time, the first frame member is configured such that the second protrusion is aligned with the opening of the groove. It is in a posture located outside of
While rotating the first frame material about the first locking receiver with the first protrusion locked in the first locking receiver, the second protrusion is moved into the groove. moving it along the guide part and locking it in the second locking receiving part;
A method of assembling a four-periphery frame of a panel according to claim 1. In the groove portion, the width dimension of the second locking receiving portion is larger than the width dimension on the back side of the guide portion.
A method for assembling a four-periphery frame of a panel according to claim 2. The method for assembling a four-periphery frame of a panel according to any one of claims 1 to 3, wherein the width dimension of the second protrusion increases in a direction away from the tip. The panel according to any one of claims 1 to 4, wherein the first protrusion has an adjustable insertion depth into the first locking receiving part in a locked state with the first locking receiving part. How to assemble a four-circle frame. When the first frame member is rotated relative to the second frame member, the tip of the second protrusion is shallowly inserted into the guide part, and the width dimension of the second protrusion at the inner edge of the groove part is adjusted to the width of the guide part. Allowing the second protrusion to pass through the guide portion with a width smaller than or equal to the width on the back side;
After the second protrusion passes through the guide part and locks into the second locking receiver, the second projection is deeply inserted into the second locking receiver, and the inner edge of the groove is locked. The width of the second protrusion is made larger than the width on the back side of the guide part to prevent the first frame member from rotating in the direction in which the second protrusion is removed from the second locking receiving part. regulate,
A method for assembling a four-periphery frame of a panel according to claim 5 (limited to claims 2 or 3 as dependent). The first frame member includes a surface portion, and a first side surface portion and a second side surface portion rising from both sides of the surface portion in the width direction,
The second frame member includes a surface portion, a first side surface portion and a second side surface portion rising from both sides of the surface portion in the width direction,
The longitudinal end portion of the surface portion of the first frame member includes an extending portion that protrudes beyond the longitudinal edges of the first side portion and the second side portion, and The first protrusion and the second protrusion are formed on both sides, respectively,
The first locking receiving portion to which the first protrusion is locked is provided at the longitudinal end of the first side surface of the second frame member, and the second locking receiving portion is provided at the longitudinal end of the second side surface of the second frame member. the second locking receivers to which the protrusions lock are formed to face each other;
A method for assembling a four-periphery frame of a panel according to any one of claims 1 to 6. A first groove is formed between the first protrusion and an edge of the longitudinal end of the first side surface of the first frame member,
When inserting the first protrusion into the first locking receiver, a portion of the first side surface of the second frame member between the first locking receiver and the side edge is inserted into the first recess. It is designed to fit into the groove,
A second groove is formed between the second protrusion and the edge of the longitudinal end of the second side surface of the first frame member,
When the second protrusion moves through the guide portion of the groove, a portion of the second side surface of the second frame member between the guide portion and the side edge moves within the second groove. It looks like this,
A method for assembling a four-periphery frame of a panel according to claim 7 (limited to claims 2 as dependents) .

Images