JP3570321B2 - Member connection structure - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a member connecting structure suitably applied when a frame is attached to a round pipe-shaped support.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in furniture such as a sofa, for example, two opposing surfaces in a corner portion of a frame body receiving a load of a furniture main body may be abutted on a support arranged in an upright state and connected. In this case, by cutting the corner of the frame substantially vertically for a post made of square material such as a square pipe material, on the other hand, for a post made of round pipe material, the corner of the frame is cut off The frame is abutted against the support without gaps by curving it into a partial arc and cutting it out according to the shape of the peripheral wall.
[0003]
[Problems to be solved by the invention]
However, in such a case, the shape of the corner portion is different as described above because the frame cannot be shared between the case where the shape of the column in plan view is square and the case where the column is round. There is a problem in that two types of frames have to be prepared, and the manufacturer has to keep a large number of stocks for each frame.
[0004]
[Means for Solving the Problems]
The present invention has been made in view of the above-described problems, and has a shape of a corner portion of only one type of frame body by deforming a part of a peripheral wall of a pillar made of a round pipe material. It is intended to provide a member connecting structure adapted to be able to cope with a support composed of:
[0005]
BEST MODE FOR CARRYING OUT THE INVENTION
That is, the member connecting structure of the present invention is a frame body having two surfaces that are substantially horizontal with respect to a support made of a metal round pipe material and arranged in an upright posture, and face each other at a predetermined angle to a corner portion. be those capable of connecting to form a pair of flat portions having a more planar corresponding to the predetermined angle to plastically deforming a portion of the peripheral wall of the strut, the two sides of the frame on the flat portion , Respectively, to connect the frame to the support.
[0006]
With such a configuration, the two surfaces at the corners of the frame can be attached to the flat portion formed on the pillar made of the round pipe material without any gap, so that the corner of the frame is attached to the peripheral wall of the pillar. It is possible to omit the necessity of performing a troublesome machining operation such as notching in a partial arc shape in accordance with the shape of. Then, when the frame is connected to the support, the round peripheral wall of the support can be seen from the outside, so that the appearance can be favorably maintained. Furthermore, since such a frame can be applied to and attached to a support made of a square pipe material or the like as it is, the frame can be used as a support made of a round pipe material and a support made of a square pipe material. It is possible to apply them in common, and it is not necessary to prepare two types of frames, and it is also possible to reduce the number of stocks and effectively reduce costs.
[0007]
In such a configuration, the frame body that can be appropriately connected to the column includes at least a plate-shaped bracket having a through hole for inserting a bolt on the inward side of the corner portion, Is used as a scaffold to engage the bolt with a nut provided on the support column side. As a specifically preferred embodiment of the frame body, there is one in which the corner portion of the frame body is constituted by a pair of horizontal members that are substantially perpendicular to each other.
[0008]
In order to improve the convenience of the work of attaching the frame to the support, it is desirable to form a positioning portion capable of positioning the frame between a pair of flat portions set at the upper end of the support.
In order to easily set such a positioning portion without applying special processing to the column, the positioning portion forms a flat portion by retroactively deforming the peripheral wall of the column to form a flat portion between the flat portions. It is preferable to use a surplus portion of the peripheral wall protruding from the peripheral wall. Such a surplus portion is easily formed by the difference between the length of the portion of the circumference of the round pipe that is crushed as a flat portion and the length of the flat portion after the retrograde deformation when the post is subjected to the retroactive deformation process. You. In this case, in order to appropriately form the surplus portion so as to have a preferable shape as the positioning portion, it is effective to form a cutout portion in which a part of the surplus portion is cut off at the upper end of the portion to be the surplus portion. is there.
[0009]
In addition, when the surplus portion protrudes toward the corner of the frame, there is a risk that the surplus portion may cut a finger, but in order to effectively avoid such a problem, It is preferable that a cap that is inserted into the inside of the support and conceal the upper end of the support from above is attached, and a cover portion that can surround only the surplus portion from above and from the side is formed on the cap.
[0010]
By effectively utilizing the configuration of such a cap, in order to save troublesome work such as welding a nut to the inner wall of the column, the nut is embedded in an insertion portion of the cap inserted into the column. It is desirable to provide a through-hole corresponding to the screw hole of the nut and to provide a through-hole in the support corresponding to the through-hole so that a bolt can pass therethrough. In this case, the cap is acted on by the bolts in the direction of being drawn to the corners of the frame, and the flat portions of the columns are acted on by the pressing forces from the two surfaces of the frame. in order to prevent deformation of the flat part of the time, the insertion portion, a pair of backing portion forms a flat supporting the inner surface of the flat portion in contact with the inner surface of the pair of flat portions from the inside The formation is effective.
[0011]
【Example】
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
This embodiment is applied to the sofa shown by the imaginary line in FIG. 1, and four pillars 3 which stand on the floor in a standing state and are attached to the seat 11 and the back 12 constituting the sofa body 1 shown by the imaginary line. This is for connecting the frame 2 that supports the load. The seat 11 and the back 12 include a cushioning material inside the upholstery.
[0012]
First, as shown in FIGS. 1 and 2, the frame body 2 is configured by disposing two pairs of horizontal members 21 and 22 made of metal square pipe members having different lengths so as to have a substantially rectangular shape in a plan view. In the corner portion 2X formed by the adjacent horizontal members 21 and 22, the side end surfaces 21a and 22a of the horizontal members 21 and 22 face each other at a substantially right angle. Then, a plate-like bracket 23 is arranged inside each corner 2X, and the side end 23b of the bracket 23 is attached to the inward surfaces 21b, 22b of the corresponding transverse members 21, 22 by welding. In this state, the frame 2 having sufficient rigidity is configured. A substantially central portion of the bracket 23 is provided with a through hole 23a for inserting a bolt 24 described later.
[0013]
As shown in FIGS. 1 to 3, the column 3 is made of a hollow metal round pipe material cut to a predetermined length, and has a ground member (not shown) attached to a lower end thereof. On the other hand, the upper end 3a of the column 3 is subjected to retro-deformation of the peripheral wall 31 so as to correspond to the two side end surfaces 21a, 22a of the pair of horizontal members 21, 22 at the corner 2X of the frame 2. A pair of flat portions 32 constituted by two planes are formed. This flat portion 32 is formed as follows. That is, the upper end 3a of the column 3 is sandwiched by an appropriate jig, and a predetermined pressure is applied so that two substantially orthogonal planes are formed. Then, when the flat portion 32 is viewed directly, the rectangular shape is substantially the same as the side end surfaces 21a and 22a of the horizontal members 21 and 22. Here, the substantially horizontal one side a of the flat portion 32 is shorter than a part b (shown by an imaginary line in FIG. 3) of the circumference of the round pipe before the retrogressive deformation corresponding to the portion, so that the retrograde At the time of the deformation processing, an extra portion 33 called so-called flesh is generated between the flat portions 32 between the flat portions 32, and the extra portion 33 projects toward the corner portion 2X of the frame 2 or Or, it will be immersed toward the inside of the column 3. In the present embodiment, in order to protrude the surplus portion 33 toward the corner portion 2X and further stabilize the shape, a portion corresponding to the tip portion 33a of the surplus portion 33 at the upper end portion 3a of the column 3 is A small cutout 33b is formed before the retroactive deformation process is performed. In this embodiment, the surplus portion 33 is used as a positioning portion 33X when the frame 2 is attached to the column 3. The support 3 has a transparent window 34 through which the bolt 24 passes, corresponding to the through hole 23 a of the bracket 23 provided in the frame 2. The transparent window 34 is also opened in the peripheral wall 31 of the column 3 before the retroactive deformation processing.
[0014]
Further, a cap 4 in which a nut 46 corresponding to the bolt 24 is embedded is attached to the upper end 3a of the column 3. As shown in FIGS. 1 to 4, the cap 4 includes a cap main body 41 formed by integral molding of a synthetic resin and a nut 46 previously embedded by insert molding at the time of molding. The cap body 41 has an insertion portion 43 for inserting the column 3 from above into the inside of the column 3, and a lid 42 for concealing the upper end of the column 3 with the insertion portion 43 inserted into the column 3. The lid 42 has a part protruding toward the tip 33a of the surplus part 33 so as to correspond to the surplus part 33 of the support column 3, and is further opened downward so as to cover the surplus part 33 from the side. Cover portion 42a is formed. The insertion portion 43 is formed with a through hole 44 penetrating in a substantially horizontal direction corresponding to the through hole 23a of the bracket 23 and the transparent window 34 of the column 3 so that the bolt 24 is inserted. The nut 47 is embedded in the cap main body 41 so that the screw hole 47a corresponds to the through hole 44. The side of the cap main body 41 to which the nut 47 is drawn by the tightening force when the bolt 24 is tightened to the nut 47. The inner side is set to a thickness sufficient to withstand the tightening force. On the other hand, the chamfered portion 47b of the nut 47 is directed to the outer side opposite to the side on which the tightening force acts, and the thickness of the cap body 41 is present only in the chamfered portion 47b. A thin portion 4X having a lower strength than its surroundings is set. This is because when the cap 4 is disposed of, a rod or the like is inserted from the side where the bolt 24 was inserted into the through hole 44 of the cap body 41 removed from the column 3 and hits against the nut 47, and the rod is impacted. The thin portion 4X is easily destroyed by transmitting the force to the thin portion 4X via the nut 47 by disposing the cap portion 41 as a resin portion and the nut 47 as a metal portion. It is designed to facilitate separation and disposal. Further, as the bolts 24 are tightened to the nuts 47 using the brackets 23 as scaffolds, the side end surfaces 21a and 22a of the horizontal members 21 and 22 are pressed against the corresponding flat portions 32 of the columns 3 and thus the flat portions are formed. A pressing force is applied to the support 32 in a direction of being pushed into the inside of the column 3. In order to receive the pressing force, the insertion portion 43 of the cap main body 41 has a flat surface so as to be in close contact with the inner surface of the flat portion 32. A pair of backing portions 45 are formed. Further, the insertion portion 43 is provided with a plurality of ribs 46 so as to be in contact with the inner peripheral surface 35 of a portion of the support 3 that forms a partial arc in plan view other than the flat portion 32 when inserted into the support 3. ing.
[0015]
When the frame 2 is connected to the column 3 to which the cap 4 is attached, first, as shown in FIGS. 2 to 4, first, the side end surfaces 21 a of the horizontal members 21 and 22 constituting the frame 2 22a is butted against the flat portion 32 of the support 3. At this time, the inward sides of the side end surfaces 21a and 22a of the lateral members 21 and 22 are made to extend along the positioning portion 33X using the surplus portion 33 of the column 3 so that the frame 2 does not shift. Then, the bolts 24 are inserted into the through holes 23a of the brackets 23, the through-holes 34 of the columns 3 and the through holes 44 of the caps 4 from the inside of the brackets 23 of the corners 2X of the frame 2, and the brackets 23 are used as scaffolds. Then, the bolt 24 is fastened to the nut 47. As a result, the side end surfaces 21a, 22a of the horizontal members 21, 22 are strongly pressed against the flat portions 32 of the columns 3, and the frame 2 can be firmly connected to the columns 3. Further, the seat 11 and the back 12 constituting the sofa body 1 are attached to the frame body 2 thus connected from above. At this time, the load of the sofa main body 1 is applied only to the frame 2 while avoiding the columns 3, and the load is not applied to the cap 4 from above.
[0016]
In the present embodiment having the above-described configuration, as described above, a pair of flat portions 32 that form a substantially right angle is formed on the peripheral wall 31 of the column 3, and the flat portions 32 form a substantially right angle with the corner portions 2 </ b> X. The frame 2 having the two flat surfaces 21a and 22a facing each other is abutted to connect the frame 2 to the column 3. Therefore, as shown in FIG. 3, the frame 2 of this embodiment can be attached to the round pipe-shaped support 3 with no gap therebetween, and the frame 2 can be formed from a square pipe material as shown in FIG. In the same manner, the frame 2 can be attached to the supporting column 130 without any gap, so that the frame 2 is common to both the case where the columns 3 and 130 are a round pipe material and the case where the columns 3 and 130 are a square pipe material. can do. As a result, it is not necessary to prepare two different types of frames, so that the number of frames 2 can be reduced and the cost can be effectively reduced. It is also possible to reduce the trouble such as cutting into a partial arc shape corresponding to the round pipe. Further, when the frame 2 is connected to the column 3 of the present embodiment, the flat portion 32 of the column 3 is not visible on the external appearance, and only the outer circumferential wall 31 is visible, so that the external appearance of the column 3 can be improved. Can be maintained.
[0017]
Further, a plate-shaped bracket 23 is provided on the inward side of the corner 2X of the frame 2 and the bolt 24 is fastened to a nut 47 provided on the column 3 using the bracket 23 as a foothold. Can be firmly and appropriately connected to the column 3. Further, the frame 2 is formed by connecting horizontal members 21 and 22 made of four square pipe members via a bracket 23 so as to form a rectangular shape in a plan view, and a pair of horizontal members which are substantially perpendicular to each other. Since the corners 2X of the frame 2 are constituted by the members 21 and 22, the frame 2 having an effective strength capable of sufficiently supporting the sofa body 1 with a simple structure can be constituted.
[0018]
Further, since the flat portions 32 are provided on the upper end portions 3a of the columns 3 and the positioning portions 33X are formed between the flat portions 32, the positioning operation when attaching the frame 2 to the columns 3 is simplified. be able to. In addition, since the positioning portion 33X utilizes the surplus portion 33 generated when the peripheral wall 31 of the column 3 is subjected to retroactive deformation processing in forming the flat portion 32, the positioning portion 33X having a simple configuration is used. Can be easily set by effectively utilizing the configuration. Furthermore, since the cut-out portion 33b, which has been cut out small in advance, is provided at the upper end of the portion that becomes the surplus portion 33 due to the retrograde deformation, the surplus portion 33 can be stably projected into a desired shape.
[0019]
In addition, the cap 4 that covers the upper end of the support 3 is attached to the support 3 by inserting it from above, and the cap 4 has the cover portion 42a that covers the excess portion 33 of the support 3 from above and from the side. In addition, it is possible to effectively prevent injuries such as cutting a finger by the surplus portion 33 while improving the appearance of the column 3 and to make the variation in the shape of the surplus portion 33 inconspicuous.
[0020]
In particular, a nut 47 is embedded in the insertion portion 43 of the cap 4 which is inserted into the support column 3 by insert molding or the like in advance, and the through hole 44 corresponding to the screw hole 47 a of the nut 47 and the transparent window 34. Is provided on the insertion portion 43 and the support 3, so that the time and effort of welding the nut 47 to the inner wall of the support 3 can be effectively saved, and the nut 47 corresponding to the bolt 24 can be easily kept on standby on the support 3 side. Can be.
[0021]
Further, since the backing portion 45 that supports the flat portion 32 of the support column 3 from the inside is formed in the insertion portion 43 of the cap 4, when the bolt 24 is tightened to the nut 47, The pressing force acting on the flat portion 32 is effectively received by the backing portion 45, and the deformation of the flat portion 32 can be prevented.
Note that the present invention is not limited to the above-described embodiment, and a surplus portion generated when the column is retrogradely deformed may be immersed toward the inside of the column although it cannot be used as a positioning portion, or may be gently projected. Good. Further, the present invention is not limited to the sofa as in the above-described embodiment, and can be applied to a case where a frame is attached to a support in a chaise lounge or a bench having a chair body made of a hard resin, or various other furniture. . In addition, the specific configuration of each part, such as the specific configuration of the frame, is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.
[0022]
【The invention's effect】
The present invention is implemented in the form described above, and has the following effects.
That is, when connecting a frame having two surfaces facing a corner portion at a predetermined angle to a support made of a metal round pipe material in a substantially horizontal posture, the member connecting structure of the present invention A pair of flat portions formed by planes having a predetermined angle corresponding to the two surfaces are formed by plastic deformation processing , and the two surfaces of the frame body are brought into contact with the flat portions. Therefore, two surfaces formed by cutting the corner portion of the frame substantially vertically can be abutted against the flat portion of the column without any gap, so that this frame is attached to a column made of a square pipe material. Therefore, the frame can be shared by both the case where the pillar is a round pipe material and the case where the column is a square pipe material. As a result, it is possible to eliminate the need to prepare two types of frames having different corner portions, and it is also possible to effectively reduce costs by reducing the number of stocks of these frames. Also, even if the frame is connected to a post made of a round pipe material, the flat portion of the post is not visible on the external appearance, and only the round peripheral wall facing outward can be seen, so that the appearance of the post can be maintained well. it can.
[0023]
Specifically, the above-described configuration is applied to a case where a plate-shaped bracket is provided on the inward side of the corner portion of the frame body, and the bracket is used as a scaffold and a bolt is tightened to a nut which is made to stand by on the column side. If so, the frame can be suitably connected to the support. More specifically, when the corners of the frame are formed by a pair of horizontal members that are substantially perpendicular to each other, it is possible to configure good furniture that supports the furniture body with the horizontal members. it can.
[0024]
In addition, when the flat portions are set at the upper end of the column and a positioning portion that can position the frame body between the flat portions is formed, the convenience of mounting the frame to the column can be effectively improved. .
Further, when the flat wall is formed by retroactively deforming the peripheral wall of the column, the surplus extruded due to the difference between the width dimension of the flat portion and the peripheral portion of the round pipe before the retrograde deformation corresponding to the flat portion. If a portion is used, the positioning section can be easily set. In this case, if a small cut-out portion is provided at the upper end of the portion that becomes the surplus portion before the retroactive deformation, the shape of the surplus portion to be extruded is stabilized, and the surplus portion is projected into a preferable shape as the positioning portion Can be done.
[0025]
Further, when a cap inserted into the inside of the support and covering the upper end of the support from above is attached, and the cover is formed on the cap so as to cover only the above-mentioned protruding surplus part, the surplus part allows the finger to be used. It is possible to effectively prevent injuries such as turning off the vehicle.
When such a cap is provided, a nut is previously buried by insert molding or the like in an insertion portion of the cap to be inserted into the inside of the column, and a through hole corresponding to the screw hole of the nut is formed, and the column corresponds to this through hole. By providing a transparent window through which the bolts can pass, the trouble of welding a nut to the inner wall of the column can be effectively saved. In such a configuration, the insertion portion, when forming the pair of backing portion forming a planar backing up the inner surface of the flat portion of the strut from the inside by contacting the inner surface of the pair of flat portions In addition, the flat portion can be effectively prevented from being deformed against a force acting in a direction in which the flat portion of the column is depressed from the frame body.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of the present invention.
FIG. 2 is an enlarged perspective view of a main part of the same part.
FIG. 3 is an enlarged plan view of the main part.
FIG. 4 is a sectional view taken along line AA in FIG. 3;
FIG. 5 is a schematic plan view showing a state where the frame body of the embodiment is connected to a square pipe-shaped support.
[Explanation of symbols]
2 Frame 2X Corner 3 Column 4 Caps 21 and 22 Horizontal members 21a and 22a Two surfaces (side end surfaces)
23 Bracket 24 Bolt 31 Peripheral wall 32 Flat portion 33 Excess portion 33b Cutout portion 34 Transparent window 42a Cover portion 43 Insertion portion 44 Through hole 45 Backing portion 47 Nut

Claims (10)

For a support made of a metal round pipe material and arranged in an upright posture, a frame having two surfaces facing each other at a predetermined angle in a substantially horizontal posture and at a corner portion can be connected,
Forming a pair of flat portions having a more planar corresponding to the predetermined angle a portion of the peripheral wall of the strut to plastic deformation, by butting each said second side of the frame on the flat portion, the frame A member connecting structure, wherein the member is connected to a support. The frame body is provided with at least a plate-shaped bracket having a through hole for inserting a bolt on the inward side of the corner portion. The member connecting structure according to claim 1, wherein the members are connected to each other. 3. The member connecting structure according to claim 2, wherein the corner portion of the frame is constituted by a pair of horizontal members that are substantially perpendicular to each other. The member connecting structure according to claim 2 or 3, wherein a positioning portion capable of positioning the frame is formed between a pair of flat portions set at an upper end portion of the support. 5. The positioning part according to claim 4, wherein, when the peripheral wall of the column is retroactively deformed to form a flat part, a surplus part of the peripheral wall protruding between the flat parts is used. Member connection structure. 6. The member connecting structure according to claim 5, wherein a cutout portion is formed by cutting off a part of the surplus portion at an upper end thereof. 6. A cap which is inserted into the support and covers the upper end of the support from above, and a cover is formed on the cap so as to surround only the surplus portion from above and from the side. 7. The member connecting structure according to 6. The nut is embedded and provided in an insertion portion of the cap inserted into the support, and a through-hole corresponding to a screw hole of the nut is formed, and a through-hole that allows a bolt to pass through the support corresponding to the through-hole. The member connecting structure according to claim 7, wherein the member is opened. The member connecting structure according to claim 8, wherein a backing portion that supports an inner surface of the flat portion from inside is formed in the insertion portion. For a support made of a metal round pipe material and arranged in an upright posture, a frame having two surfaces facing each other at a predetermined angle in a substantially horizontal posture and at a corner portion can be connected,
To form a pair of flat portions having a plane corresponding to the predetermined angle in a part of the peripheral wall of the pillar, between the ends of the pair flats to form a positioning unit that can position the frame, the pair A cap having a pair of backing portions and an insertion portion having a nut so as to be in contact with the inner surface side of the flat portion is inserted into the inside of the support and attached, and the two surfaces of the frame body are respectively attached to the flat portion. A member connecting structure wherein the frame is connected to the column by engaging a bolt inserted into the column and the cap from the frame side with the nut in the abutted state .

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