JPH1066208A - Structure of housing framework - Google Patents

Abstract

PROBLEM TO BE SOLVED: To cut production cost by improving the assembly accuracy indimension and right angle. SOLUTION: A pillar 10 is a plate member of nearly square sleeve and a base frame 20 is a plate member having a nearly square flat part 21, to each side of which frame parts 22, 23 of 'L' shape are united. A corner pressing bracket 40 is a plate member unified with an 'L' shape part 41, which contacts the surfaces of the two side parts inside each edge part of the pillar 10, and flat parts 42, 43. On the pillar 10 and the contacting parts of the corner pressing bracket 40, embossed parts 14, 15, 44, 45 for positioning are formed with passing holes. First, the two edge parts of the pillar 10 are fit to each groove 24, 25 formed on each turned-down parts 22, 23 of the base frame 20. Then, the corner pressing bracket 20 is moved from the position shown by a continuous line to the one by a broken line to the direction of arrow and the embossed parts corresponding to the pillar 10 are fit to each other to determine the positions and to be riveted. The riveting holds the base frame 20 tightly with the corner pressing bracket 40 and the pillar 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure in which a base plate and a ceiling plate are attached to a frame corresponding to all ridges of a rectangular parallelepiped housing applied to, for example, a switchboard or a control panel. The present invention relates to a frame structure of a housing that can achieve high accuracy in assembling at a right angle and reduce the manufacturing cost.

[0002]

2. Description of the Related Art The frame structure of a rectangular parallelepiped housing applied to a conventional switchboard or control panel can be roughly classified into (1) a method by welding, (2) a method by bolt (screw) fastening, and (3) bonding. Has been produced by the method described above.

[0003]

The three conventional methods have the following disadvantages. (1) In the welding method, the dimensions and the squareness are likely to be out of order due to local heating during welding, and welding marks that damage the surface are generated. Therefore, in order to correct and remove it, mechanical correction and surface finish correction are performed, but this requires skill and man-hours, poor welding work environment,
The painting process is performed after the assembling process by welding, and the size of the painting process increases, so that transportation costs between processes are required.

(2) In the method using bolts, it is unavoidable that the assembly accuracy is reduced due to the gap between the bolts and the through-holes, which are essentially present. Since a group is required, an extremely large number of parts are required for all operations, and troublesome torque management is indispensable for maintaining operation quality related to screw fastening. (3) The method of bonding requires troublesome preparation work such as fixing jigs for the related members and tapping for temporary fixing for the bonding work. It requires time and a design to take up the bonding area where removal of the protruding adhesive is cumbersome.

[0005] In short, what can be said in common with the conventional method is that the assembling accuracy (dimensions, squareness) of the skeleton is poor and the repair work is generally difficult. To reduce the quality and increase the overall cost by requiring a high level of skill of the operator and many man-hours for the correction. The problem to be solved by the present invention is to solve the above-mentioned problems of the prior art, and to provide a frame structure of a housing capable of achieving high dimensional and square assembly accuracy and reducing manufacturing costs. It is in.

[0006]

The present invention has a structure in which a base plate and a ceiling plate are attached to a frame corresponding to all ridges of a rectangular parallelepiped housing, and the base frame and the ceiling have the same rectangular shape. The frame includes four pillars connecting the corresponding corners of the base frame and the ceiling frame to each other, and a corner pressing tool to be riveted to each end of the pillar. The pillar has a hollow rectangular cross section. The base frame and the ceiling frame are plate-like members each having a rectangular cylindrical shape with a predetermined intermediate position of each side including and including the inner corner thereof removed. A square planar portion (corresponding to a base plate and a ceiling plate) and an L-shaped folded portion connected to each side thereof are integrally formed, and only a folded portion at each corner of the planar portion is formed. Plate with squares removed corresponding to the section of the column The corner pressing tool is an L-shaped part which is in contact with the surface of the inner two sides at each end of the pillar, and a folded part of the base frame and the ceiling frame which extends at a right angle from each end thereof. Is a plate-like member integrally formed with a flat portion that contacts the bottom surface of the column. At the contact portion between the pillar and the corner pressing tool, an embossing portion for positioning is formed respectively, and there is a rivet penetration there. Holes are provided, and each of the two edges related to the removed portion of the pillar is fitted and connected to each of the folded portions of the base frame and the ceiling frame, for example, by inserting the edges into the grooves, and the corner pressing tool is attached to the pillar. The base frame and the ceiling frame are clamped and fixed by the corner pressing tool and the column by rivet fastening.

Further, according to the present invention, the corner pressing tool may be a plate-like member having a high rigidity structure, for example, a plate-like member having a thicker plate or provided with a bent portion or a rib for reinforcement. preferable. Therefore, according to the present invention, each end of the four pillars is fitted into the removed portion (hollow portion) of each corner of the base frame and the ceiling frame, and two edges of the pillar are removed. Then, the base frame and the ceiling frame are fitted into the folded portions, for example, by inserting the edges into the grooves.
Next, by riveting the corner pressing tool to the pillar, each of the base frame and the ceiling frame is clamped and fixed between the positioned corner pressing tool and the pillar, and the squareness of the base frame, the ceiling frame, and the pillar is accurately determined. I can put it out well. Here, when the corner pressing tool is a plate-like member having a high rigidity structure, its elastic deformation is suppressed, so that it is possible to assist in obtaining the right angle accuracy.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. First, the overall appearance of the embodiment will be described with reference to FIG. 5 which is a perspective view thereof. In FIG. 5, this embodiment is a framework corresponding to all ridges of a rectangular parallelepiped housing applied to, for example, a switchboard or a control panel, that is, each folded portion (frame) 2 of the base frame 20.
A total of four including the opposing portions of 2,23, a total of four including the opposing portions of the folded portions (frames) 32,33 of the ceiling frame 30, and four of the pillars 10, This is a structure in which a flat portion (base plate) 21 and an upper flat portion (ceiling plate) 31 are provided.

FIG. 1 is a perspective view of a main part (part A in FIG. 5) of the embodiment, and FIG. 2 is a plan view of a main part of the embodiment. Here, pillar
Although the lower end portion of 10, the one corner on the near side of the base frame 20, and the corner pressing tool 40 are shown as representatives, the ceiling frame 30 has the same configuration. The frame structure includes a square base frame 20, a ceiling frame 30 (not shown) (see FIG. 5), four pillars 10 connecting respective corresponding corners, and four pillars 10.
Corner presser 40 that is riveted to each of the upper and lower ends
Consists of

The pillar 10 is a plate-like member having a substantially rectangular cylindrical shape, having a hollow rectangular cross section and a portion from an inner corner to a predetermined intermediate position of a long side on the other side thereof is deleted. Base frame 20
Is a plate-like member having a shape in which an L-shaped frame portion is connected to each side of a rectangular planar portion. Specifically, a square planar portion (base plate) 21 and L-shaped folded portions (frames) 22 and 23 (also located on opposite sides) connected to respective sides thereof are integrally formed, Moreover, the plane part
Only the folded portions 22 and 23 of each corner of 21 are deleted in a square shape corresponding to the cross section of the pillar 10. Further, a projection 24 and a slit-like groove 25 are formed on each of the folded portions 22 and 23 adjacent to the deleted portion.

The corner pressing tool 40 has an L-shaped portion 41 at each end of the pillar 10 which is in contact with the surface of two inner sides thereof, and a bent portion of the base frame 20 which extends at a right angle from each end. Two
This is a two-stage L-shaped plate-like member in which the flat portions 42 and 43 that come into contact with the bottom surfaces of the members 2 and 23 are integrally formed (see FIG. 2).
In order to impart rigidity to the corner pressing member 40, the plate thickness is made thicker than the other pillars 10 and the base frame 20, and the edges of the L-shaped portion 41 and the flat portions 42, 43 are bent for reinforcement against pressing. Department
46, 47, and 48 are integrally provided.

An embossing portion for positioning is formed in each of the contact portions between the pillar 10 and the corner pressing tool 40, and a hole for rivet penetration is provided there. That is, the pillar 10 has an embossed portion 14 and a hole 14 at the short side on the other side and the portion left and removed on the long side on the left side.
a, and two sets of a set of an embossed portion 15 and a hole 15a are formed. Correspondingly, the corner pressing tool 40 has an embossed portion 44 and a hole formed on each leg of the L-shaped portion 41, respectively. Two sets of a set of 44a and two sets of a set of an embossed portion 45 and a hole 45a are formed.
In FIG. 2, in this embodiment, only the long side is deleted from the inside corner of the pillar 10 and the short side is not deleted. In other words, the deletion of the short side is stopped at the corner position. .
This is a design problem only, because if the short side is deleted, the length required for rivet fastening described later cannot be provided on the short side. In essence, since it is an eye to form an edge necessary for fitting to be described later on each of the long and short sides by deletion, in general, a predetermined intermediate portion of each of the long and short sides connected to this including the inner corner is included. The position is deleted.

The assembling of the above members is performed as follows. First, each groove 11 and 12 of the pillar 10 should be
18 and 19, and each edge 11 and 12 at each groove 18 and 19
Are formed on the folded portions 22 and 23 of the base frame 20.
The so-called fitting connection is obtained by fitting into the groove 24 and the groove 25, respectively. Next, the corner presser 40 is moved in the direction of the arrow from the solid line position to the broken line position, the pillar 10 and the corresponding embossed portion are fitted and positioned, and the rivet 50 is pierced through a common hole and rivet fastening is performed. (See part B in FIG. 2). By rivet fastening, the base frame 20 is
The corner presser 40 positioned by the fitting of the embossed portions and the column 10 are clamped and fixed, and at the same time, the perpendicularity of the column 10 to the base frame 20 can be improved with high accuracy. In addition,
The rivet setting will be described later in detail.

The rivet setting will be described with reference to FIGS. 3 and 4. FIG. 3 shows a rivet fastening point (B in FIG. 2).
FIG. 4 is a cross-sectional view of the rivet fastening portion after fastening. In FIG. 3, in order to fasten a rivet, a rivet 50 and an auxiliary member 51 for fastening which penetrates the rivet 50 are provided.
Is a fastening unit, and a dedicated fastening tool (not shown) is used. The rivet 50 has an integral structure including a round head and a body, and has a through hole in the axial direction thereof. The auxiliary member 51 has an integral structure including a cylindrical right end portion having the same diameter as the body of the rivet 50 and a shaft portion having a slightly smaller diameter on the left side, and the shaft portion penetrates the rivet 50 to constitute one unit. With the auxiliary member 51, a slope is formed at the step between the right end and the shaft portion. The slope at the right end is just a chamfer. Now, the fastening unit composed of the rivet 50 and the auxiliary material 51 is inserted into the coaxial holes 15a, 45a from the left side of the pillar 10 and the corner pressing tool 40 positioned by fitting the respective embossed portions 15, 45 together. Penetrate (before penetration in figure).

In FIG. 4, while the head of the rivet 50 is pressed against the left side surface of the corner pressing tool 40 by a fastening tool (not shown), the auxiliary member 51 is gripped by the left shaft portion and pulled leftward. At the same time, the right end of the body of the rivet 50 is pushed outward through the left slope of the right end, and at the same time, the portion remaining on the back side of the auxiliary material 51 is enlarged and caulked, and the corner presser 40 and the pillar 10 are fastened. . After the fastening is completed, the shaft portion of the auxiliary member 51, which protrudes to the left from the head of the rivet 50, is cut and removed, and the right end of the auxiliary member 51 is crimped together with the caulking portion of the rivet 50 to the state shown in the figure.

[0016]

According to the present invention, there is a basic effect that the assembling accuracy of dimensions and squareness can be improved, and the manufacturing cost can be reduced. The cause is that the members processed with high precision are assembled at room temperature by fitting and riveting. That is, the respective ends of the four pillars are fitted into the hollow portions of the respective corners of the base frame and the ceiling frame, and the two removed edges of the pillars are folded into the folded portions of the base frame and the ceiling frame, respectively. Then, the base frame and the ceiling frame are clamped and fixed by the corner pressing tool and the column accurately positioned via the embossed portion by riveting the corner pressing tool to the column.
Therefore, assembling accuracy of dimensions and squareness can be obtained as it is, and no repair work is required. Therefore, a high level of skill and a large number of man-hours are not required for the worker, and the production cost can be reduced. In addition, by making the corner pressing tool have a high rigidity structure, improvement of the assembling accuracy is supported.

Another additional effect is that each member is preliminarily surface-finished by painting, plating, etc., and is transported to the assembly workplace in the state of the member. The risk of damage is reduced and the transportation costs between steps are reduced. In addition, since there is no need for troublesome welding for work management, bolt (screw) fastening, or bonding with an adhesive, variations in quality due to the skill of the operator are reduced (quality stabilization).

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of an embodiment according to the present invention.

FIG. 2 is a plan view of a main part of the embodiment.

FIG. 3 is a sectional view of a rivet fastening portion before fastening.

FIG. 4 is a sectional view of the rivet fastening location after fastening.

FIG. 5 is a perspective view of the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Column 11, 12 Edge part 14, 15 Emboss part 14a, 15a Hole 18, 19 groove 20 Base frame 21 Flat part (base plate) 22, 23 Folding part (frame) 24 Projection 25 Groove 26 Deletion part 30 Ceiling frame 31 Flat surface Part (ceiling plate) 32, 33 Folded part (frame) 40 Corner pressing tool 41 L-shaped part 42, 43 Plane part 44, 45 Embossed part 44a, 45a Hole 46, 47, 48 Bent part 50 Rivet 51 Auxiliary material

Claims (2)

[Claims] 1. A structure in which a base plate and a ceiling plate are attached to a skeleton corresponding to all ridges of a rectangular parallelepiped housing, the base frame and the ceiling frame having the same rectangular shape, the base frame and the ceiling frame, respectively. The column includes four pillars connecting the corresponding corners to each other, and a corner pressing tool that is riveted to each end of the pillar. The pillar has a hollow rectangular cross section and includes inner corners. It is a plate-like member that forms a rectangular cylindrical body in which a predetermined intermediate position of each side connected thereto is deleted, and the base frame and the ceiling frame each have a square planar portion as one of the base plate and the ceiling plate, An L-shaped folded portion connected to each side thereof is integrally formed, and only a folded portion of each corner of the plane portion is a plate-shaped member which is removed in a square shape corresponding to the cross section of the pillar. , Corner presses at each end of the pillar, two sides inside And L-shaped portion in contact with the surface,
It is a plate-like member that extends at a right angle from each end thereof and has a flat portion integrally formed with a bottom portion of the folded portion of each of the base frame and the ceiling frame. Embossed portions for positioning are formed in each of them, and holes for rivet penetration are provided in the embossed portions.
While fitting and connecting with each folded part of the ceiling frame,
By riveting the corner pressing tool to the pillar,
A frame structure for a housing, wherein each of a base frame and a ceiling frame is fixedly pressed by a corner pressing tool and a column. 2. The frame structure according to claim 1, wherein the corner pressing tool is a plate member having a high rigidity structure.