JP5650998B2 - Connected structure - Google Patents

Description

  The present invention relates to a connection structure for connecting a pair of members to be connected having a hollow portion opened at a connection side end.

  For example, Patent Documents 1 and 2 disclose a structure for connecting a pair of members to be connected having a hollow portion that opens to the connection side end. In the connection structure of Patent Documents 1 and 2, both ends of a connecting member (corner joint member or L-shaped joint core) formed in an L shape are connected to the end of a hollow extruded shape member that is a non-connecting member. Each of them is inserted and a stop screw or a tapping screw is screwed in from the outer surface of the hollow extruded shape member to fix the skin of the connecting member and the skin of the connected member.

Utility Model Registration No. 3010372 Japanese Patent Laid-Open No. 5-86772

  In the case of the above connecting structure, the skin of the connecting member and the skin of the connected member are fixed with screws, so the fixing strength is not so strong, for example, under the use conditions where vibration is applied, the fixing strength is insufficient. There was a case.

  From such a viewpoint, an object of the present invention is to provide a connection structure capable of improving the fixing strength.

The invention according to claim 1 for solving such a problem is a connection structure for connecting a pair of members to be connected having at least a hollow portion opened at a connection side end via a connection member, wherein the connection The member includes a pair of insertion portions respectively inserted into the hollow portions of the pair of coupled members, and an intermediate portion positioned between the pair of insertion portions, and each insertion direction of the pair of insertion portions. Are formed integrally with a hollow extruded shape having a direction orthogonal to both of the extrusion directions, and the hollow portion is defined by a skin having a pair of first opposed surfaces and a pair of second opposed surfaces. And the pair of first opposing surfaces are pressed inward from each other by a first fastening means comprising a bolt and a nut installed along the extrusion direction, and the pair of second opposing surfaces are in the extrusion direction Second tightening installed in a direction perpendicular to Are pressed inside each other by means, wherein the insertion portion is fixed by being sandwiched by the pair of the first opposing surface, is fixedly arranged between a pair of said second opposing surface, the insert, the with tubular guide portion has an inner peripheral surface of circular cross section which surrounds the shank of the bolt receiving the fastening shaft force of the biasing first clamping hand stage is provided to extend in the extrusion direction, the second fastening A rib is provided along the insertion position of the attaching means and receives a tightening axial force of the second fastening means, and the cylindrical guide portion protrudes forward in the insertion direction at the distal end portion of the insertion portion. It is formed, The said rib is formed in the base end side of the said insertion part rather than the said cylindrical guide part , It is a connection structure characterized by the above-mentioned.

According to such a configuration, the insertion portion is clamped and fixed by the two fastening means orthogonal to each other from the outer surface of the connected member, so that the connecting member and the connected member are firmly fixed. In addition, since it is fixed in two directions, the play between the members can be suppressed. Further, by providing the cylindrical guide portion and the rib, a strong tightening axial force can be received. Furthermore, since it is reinforced with the cylindrical guide part and the rib, the face material constituting the skin can be thinned, and the weight of each member can be reduced. Moreover, since the connecting member is constituted by the hollow extruded shape, a connecting member with high processing accuracy can be provided. Furthermore, if a formation angle of an insertion part and an intermediate part is changed, a to-be-connected member can be connected at various angles. Further, since the first tightening means is located at the distal end portion and the second tightening means is located on the proximal end side, the first tightening means and the second tightening means do not interfere with each other.

  Furthermore, in the present invention, it is preferable that the pair of members to be connected is constituted by a hollow extruded shape member made of aluminum or aluminum alloy having a rectangular cross section.

  According to such a structure, while being able to raise the dimensional accuracy of a to-be-connected member, the further weight reduction of a connection structure can be achieved.

  According to the connection structure according to the present invention, it is possible to obtain an excellent effect such that the fixing strength can be improved.

It is the perspective view which showed the frame body formed by employ | adopting the connection structure which concerns on embodiment of this invention. It is the disassembled perspective view which showed the connection structure which concerns on embodiment of this invention. It is the perspective view which showed the connection member. It is the figure which showed the to-be-connected member, Comprising: (a) is sectional drawing which showed the cutting process of a partition plate, (b) is the perspective view which saw through the inside. It is the perspective view which showed the modification of the connection member. It is the perspective view which showed the other modification of the connection member. It is the perspective view which showed the other modification of the connection member.

  EMBODIMENT OF THE INVENTION The form for implementing this invention is demonstrated in detail, referring an accompanying drawing. In the present embodiment, as illustrated in FIG. 1, a description will be given by taking as an example a frame body 2 that is formed by employing a coupling structure 1 and coupling long coupled members 10 to each other. In this frame body 2, the connected members 10 are connected at various connection angles. The shape of the frame body 2 is an example, and is not intended to be limited to the shape of FIG.

  As shown in FIG. 2, the connection structure 1 is a structure in which a pair of connected members 10 and 10 each having a hollow portion 11 that opens at least at a connection side end are connected via a connection member 20.

  In this embodiment, as shown in FIG. 2 and FIG. 4B, the hollow portion 11 of the coupled member 10 is partitioned by a skin 12 having a pair of first opposing surfaces and a pair of second opposing surfaces. ing. The to-be-connected member 10 is configured by a hollow extruded shape member made of aluminum or aluminum alloy having a rectangular cross section. This hollow extruded shape is formed with the longitudinal direction of the connected member 10 as the extrusion direction. The connected member 10 has a vertically long rectangular cross-sectional shape, and includes a top plate 12a, side plates 12b and 12c, and a bottom plate 12d. The aforementioned skin 12 is composed of a top plate 12a, side plates 12b and 12c, and a bottom plate 12d. The inner surfaces of the top plate 12a and the bottom plate 12d form a “pair of first opposing surfaces”, and the inner surfaces of the side plates 12b and 12c form a “pair of second opposing surfaces”.

  Inside the connected member 10, a partition plate 13 is provided at an intermediate portion in the height direction. The partition plate 13 reinforces the skin 12 and is formed so as to connect the side plates 12b and 12c, and divides the hollow portion 11 of the connected member 10 vertically. The connection side end of the member to be connected 10 is formed integrally with the partition plate 13 being cut off and the end of the hollow portion 11 extending from the top plate 12a to the bottom plate 12d. In addition, the partition plate 13 is not limited to one sheet, and there may be a plurality of partition plates. Furthermore, when sufficient strength can be obtained with only the skin 12, the partition plate need not be provided.

  The top plate 12a and the bottom plate 12d are formed with through holes 14 through which first tightening means 31 described later is inserted. Further, the side plates 12b and 12c are formed with through holes 15 through which second fastening means 32 described later is inserted.

  As shown in FIG. 2, the connecting member 20 includes a pair of insertion portions 21 and 21 that are respectively inserted into the hollow portions 11 and 11 of a pair of adjacent connected members 10 and 10, and a pair of insertion portions 21 and 21. And an intermediate portion 26 located therebetween. The connecting member 20 is configured by a hollow extruded shape in which a pair of insertion portions 21 and 21 and an intermediate portion 26 are integrally formed. This hollow extruded shape member is made of aluminum or an aluminum alloy, and is formed with the direction (vertical direction in FIG. 2) perpendicular to both the insertion directions of the pair of insertion portions 21 and 21 as the extrusion direction. The connecting member 20 has the same cross-sectional shape from the upper end to the lower end (except for a through-hole 25 portion described later). In addition, the insertion direction of the insertion part 21 is the same as the extrusion direction of the connected member 10 into which the insertion part 21 is inserted.

  The insertion portion 21 is inserted into the hollow portion 11 of the connected member 10 and is fixed to the connected member 10 via the first fastening means 31 and the second fastening means 32 (see FIG. 3). The first fastening means 31 is constituted by a bolt 31a and a nut 31b, and the second fastening means 32 is constituted by a bolt 32a and a nut 32b. The bolt 31a is a member arranged along the pushing direction of the connecting member 20 (vertical direction in FIG. 2), and has a length capable of penetrating the connected member 10 in the vertical direction. The bolt 32 a is a member arranged along a direction (lateral direction) orthogonal to the pushing direction of the connecting member 20, and has a length capable of penetrating the connected member 10 in the horizontal direction. The insertion portion 21 is sandwiched and fixed from both the upper and lower sides by the first opposing surfaces (inner surfaces of the top plate 12a and the bottom plate 12d) of the connected member 10 that are pressed inward by the first fastening means 31. At the same time, the insertion portion 21 is fixed by being sandwiched from both sides in the lateral direction by the second opposing surfaces (inner surfaces of the side plates 12b and 12c) of the connected member 10 that are pressed inward by the second fastening means 32. The

The second fastening means 32 is not limited to a bolt and nut. For example, it is good also as a structure which forms a female screw in the through-hole 15 of the to-be-connected member 10, and screws directly.

  The insertion portion 21 includes an outer shell portion 22, a cylindrical guide portion 23, and a rib 24. The outer shell portion 22 is a vertically long portion having a width and height equivalent to the width and height of the hollow portion 11 of the connected member 10, and is composed of a tip plate 22a and side plates 22b and 22c. . The outer shell portion 22 protrudes forward in the insertion direction from the intermediate portion 26, and the tip plate 22a and the side plates 22b and 22c have a U-shaped cross section. The upper and lower ends of the outer shell portion 22 are opened.

  The cylindrical guide portion 23 is provided on the front end plate 22 a of the outer shell portion 22 so as to protrude forward in the insertion direction. The cylindrical guide portion 23 is a portion that surrounds the shaft portion of the bolt 31 a and receives the tightening axial force of the first tightening means 31, and extends along the pushing direction of the insertion portion 21. The cylindrical guide part 23 is formed at the same height as the outer shell part 22. The cylindrical guide portion 23 has a substantially cylindrical shape and is integrally formed with the distal end plate 22 a of the outer shell portion 22. The cylindrical guide part 23 has an inner peripheral surface slightly larger in diameter than the outer peripheral surface of the bolt 31a.

  The rib 24 is a portion that receives the tightening axial force of the second tightening means 32. The rib 24 is provided on the inner side of the outer shell portion 22 on the proximal end side with respect to the cylindrical guide portion 23. The rib 24 is provided in a direction extending in the width direction of the hollow portion 11 in a state where the insertion portion 21 is inserted into the hollow portion 11 of the connected member 10. The rib 24 is provided close to the insertion position of the bolt 32a. The bolt 32 a is disposed on the distal end side inside the outer shell portion 22, and is disposed so as to extend in the horizontal direction between the distal end plate 22 a of the outer shell portion 22 and the rib 24. The distance between the tip plate 22a and the rib 24 is slightly longer than the outer diameter of the bolt 32a.

  Through holes 25 for bolts 32a are formed in the side plates 22b and 22c of the outer shell portion 22, respectively. The through-holes 25 are formed at two locations on the upper and lower sides, and two bolts 32a are provided on the upper and lower sides. The through hole 25 is formed by drilling after forming the hollow extruded profile.

  The intermediate portion 26 is a portion that connects the insertion portions 21 and 21 at a predetermined angle, and is connected at a right angle in the connecting member 20 shown in FIG. 2. The outer peripheral cross section of the intermediate portion 26 has a fan-shaped cylindrical shape with a central angle of 90 degrees, and includes a curved plate 26a that forms an arc portion and a pair of flat plates 26b and 26b that form a radius portion. A plate-like chamfered portion 26c is formed at a connection portion between the flat plates 26b and 26b and is connected obliquely. The side plates 22b and 22c of the outer shell portion 22 of the insertion portion 21 protrude from the flat plate 26b of the intermediate portion 26. That is, the flat plate 26b, the side plates 22b and 22c, and the tip plate 22a have a cylindrical shape whose outer cross section is rectangular. The side plates 22b and 22c of the outer shell portion 22 of the insertion portion 21 are formed to be offset inward from both ends in the width direction of the flat plate 26b of the intermediate portion 26. The offset dimension is equivalent to the thickness dimension of the side plates 12b and 12c of the connected member 10. When the insertion portion 21 is inserted into the connected member 10, the outer surface of the intermediate portion 26 (the surface of the chamfered portion 26c and the surface of the curved plate 26a) and the outer surfaces of the side plates 12b and 12c of the connected member 10 are respectively It is configured to be connected without a step.

  The cut-off of the connecting side end of the partition plate 13 is processed by a press machine 50 as shown in FIG. The press machine 50 includes a die 51 that supports the partition plate 13 from below, and a punch 52 that presses and cuts the partition plate 13 from above. The die 51 has a width dimension equivalent to the width of the hollow portion 11 and is disposed on the holder 53. On the holder 53, a stepped portion 53a is formed in which the bottom plate 12d is positioned during press working. The tip of the die 51 rises in an L shape, and the partition plate 13 is supported by its upper end surface. On the die 51, a support portion 54 that supports the punch 52 in a tiltable manner is provided. The punch 52 has a width dimension equivalent to the width of the hollow portion 11, cuts the partition plate 13 in the width direction at the tip, and cuts the partition plate 13 and the side plates 12b and 12c at the side ends. The punch 52 is inclined downward as the lower surface thereof approaches the tip, and the partition plate 13 is sequentially cut from the back side.

  2 and 3 is configured to connect the members to be connected 10 and 10 at a right angle, but the connection angle (the opening angle of the members 10 and 10 to be connected) is limited to a right angle. is not. For example, it is possible to connect the members 10 and 10 to be connected at various angles, such as a connecting member 20 ′ shown in FIG. 5 and a connecting member 20 ″ shown in FIG. 6. In this case, the insertion portions 21 and 21 can be connected. The intermediate portions 26 ′ and 26 ″ are changed without changing the shape of.

  The connecting member 20 ′ shown in FIG. 5 connects the members to be connected 10 and 10 with an opening angle of 150 degrees, and the central angle of the curved plate 26 a ′ of the intermediate part 26 ′ is 150 degrees. Furthermore, the chamfered portion 26c 'is also concentric with the curved plate 26a' and curved inward, and has a circular arc with the same central angle as the curved plate 26a '. That is, the intermediate portion 26 ′ has an arc shape with a constant width. In addition, since it is the same as that of the connection structure 1 of FIG. 2 about another structure, the same code | symbol is attached | subjected and description is abbreviate | omitted.

  The connecting member 20 ″ shown in FIG. 6 connects the members 10 and 10 to be connected at an opening angle of 120 degrees, and the central angle of the curved plate 26a ″ of the intermediate portion 26 ″ is 120 degrees. The chamfered portion 26c ″ is also concentric with the curved plate 26a ″ and curved inward, and has an arc with the same central angle as the curved plate 26a ″. That is, the intermediate portion 26 ″ has an arc shape with a constant width. Since the other configuration is the same as that of the connection structure 1 in FIG. 2, the same reference numerals are given and description thereof is omitted.

  In addition, although the structure which connects the to-be-connected members 10 and 10 with an obtuse angle was demonstrated in FIG.5 and FIG.6, it is also possible to connect with an acute angle.

  According to the connection structure 1 configured as described above, the insertion portions 21 and 21 are clamped and fixed by being sandwiched from the outer surface of the connected member 10 by the two fastening means 31 and 32 that are orthogonal to each other. The connecting member 20 and the connected member 10 can be firmly fixed. Further, the first tightening means 31 is supported by the cylindrical guide portion 23 for the tightening axial force, and the second tightening means 32 is supported by the distal end plate 22a and the rib 24 for the tightening axial force. In the tightening means 31 and 32, a strong tightening axial force can be generated. As a result, it is possible to tighten with an even stronger tightening force, so that the fixing strength can be significantly increased. Furthermore, since the site | part which receives the fastening axial force of the 1st fastening means 31 is formed in the cylinder shape which covers the outer peripheral surface of the volt | bolt 31a, intensity | strength is high and can receive a big fastening axial force.

  Furthermore, since the insertion portion 21 having substantially the same shape as the hollow portion 11 is inserted into the hollow portion 11 and tightened in two directions by the tightening means 31 and 32, between the members (between the connected member 10 and the connecting member 20). ) Can be suppressed.

  Further, by reinforcing with the cylindrical guide portion 23 and the rib 24, the surface material (the distal end plate 22a, the side plates 22b and 22c and the base end plate 22d) constituting the outer skin of the insertion portion 21 and the outer skin of the connected member 10 are configured. Since the face materials (top plate 12a, side plates 12b and 12c, and bottom plate 12d) to be made can be thinned, the weight of each member can be reduced and the cost can be reduced.

  Furthermore, since the connection member 20 is formed of a hollow extruded shape, the connection structure 1 with high processing accuracy can be provided. Since the connected member 10 is also made of a hollow extruded shape, the flatness of the frame body 2 can be increased. For example, when a frame body having a long side of 1600 mm and a short side of 800 mm is placed on a flat surface, the float from the placement surface can be suppressed to 1 to 2 mm or less.

  Moreover, since the extrusion direction of the connection member 20 is a direction orthogonal to the insertion direction of the insertion part 21, the design freedom of the horizontal cross section of the connection member 20 is high, and the to-be-connected members 10 and 10 can be freely angled. Can be linked. Moreover, the longitudinal insertion part 21 according to the height dimension of the to-be-connected member 10 can be easily formed only by changing the cutting length of the hollow extruded shape member.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to the said embodiment, In the range which does not deviate from the meaning of this invention, a design change is possible suitably. For example, in this embodiment, although the to-be-connected members 10 and 10 are connected so as to intersect, it is not limited to this. As shown in FIG. 7, the connected members 10, 10 arranged so as to be parallel to each other can also be connected. In this case, in the connecting member 60, the shapes of the insertion portions 21 and 21 are the same as those of the above embodiment, and the shape of the intermediate portion 66 is different. The intermediate portion 66 includes a pair of flat plates 66a and 66a to which the insertion portions 21 and 21 are connected, respectively, and a pair of side plates 66b and 66b that connect the flat plates 66a and 66a. The side plates 66b and 66b are connected to the end portions in the width direction of the flat plates 66a and 66a, respectively, and the intermediate portion 66 as a whole has a cylindrical shape. The flat plates 66a, 66a are formed at positions that are parallel to each other and offset. The side plate 66b connected to the end in the width direction of the one flat plate 66a on the side away from the other flat plate 66a is extended from the end of the extending portion 67 and the extending portion 67 along the insertion direction. And an inclined portion 68 extending to the flat plate 66a. By providing the extending portion 67, the intermediate portion 66 is formed to have a certain width or more, and the strength can be ensured. Since it is the same as the connection structure 1 of FIG. 2, it attaches | subjects the same code | symbol and abbreviate | omits description.

  According to such a configuration, it is possible to obtain the same effect as that of the above-described embodiment and to connect the members to be connected 10 and 10 in parallel and eccentric, so that the width of the frame body can be changed in the middle. It is.

  Moreover, in the said embodiment, the cylindrical guide part 23 which receives the clamping axial force of the 1st clamping means 31 is provided in the front end side, and the clamping axial force of the 2nd clamping means 32 is received in the base end side. Although the rib 24 is provided, the present invention is not limited to this, and a rib may be provided on the distal end side and a cylindrical guide member may be provided on the proximal end side. In this case, for example, a cylindrical guide portion may be formed on the base end side surface of the rib. With such a configuration, the second fastening means is located on the distal end side, and the first fastening means is located on the proximal end side.

  Furthermore, in the said embodiment, although the cylindrical guide part 23 is formed in the outer surface of the front-end | tip board 22a, you may make it form in an inner surface. In this case, for example, the rib is formed on the base end side with a clearance capable of installing the second tightening means between the outer peripheral surface of the cylindrical guide portion, or on the base end side, A plurality of tightening means are provided with a clearance that can be installed.

  Furthermore, in the said embodiment, although the cylindrical guide part 23 is a substantially cylindrical shape, it is not limited to this. For example, it may have a square cross section, or may be partitioned with ribs to cover the bolts. In the case of a square cross section, for example, it may be formed on the outer surface of the tip plate or on the inner surface. When the cylindrical guide part is formed on the inner side surface of the distal end plate, is the rib formed on the base end side with a clearance capable of installing the second tightening means between the outer side surface of the cylindrical guide part? Alternatively, a plurality of second tightening means are provided on the base end side with a clearance that allows the second tightening means to be installed. Furthermore, the cylindrical guide portion may be formed on the distal end side surface of the rib or on the proximal end side surface of the rib. On the other hand, when the bolt is covered with a rib, a rib is provided with a clearance that allows the first tightening means to be installed on the base end side of the tip plate, and a second tightening means is provided on the base end side. What is necessary is just to provide a separate rib with the clearance which can be installed. At this time, the cylindrical guide portion has an inner peripheral surface having a rectangular cross section, but the side plate portion corresponding to the cylindrical guide portion may be thickened so that the inner peripheral surface of the cylindrical guide portion has a square sectional shape. Moreover, the installation number of each fastening means 31 and 32 is not limited to the number of the said embodiment.

  Moreover, in the said embodiment, although the to-be-connected member 10 is comprised with the hollow extrusion shape material, it is not limited to this. If the hollow part into which the insertion part of a connection member is inserted is formed in the connection side edge part, another part may be solid.

DESCRIPTION OF SYMBOLS 1 Connection structure 10 Connected member 11 Hollow part 12 Skin 20 Connection member 21 Insertion part 23 Cylindrical guide part 24 Rib 26 Intermediate part 31 1st fastening means 32 2nd fastening means 20 'Connecting member 26' Intermediate part 20 " Connecting member 26 "intermediate part 60 connecting member 66 intermediate part

Claims (2)

A connection structure that connects a pair of connected members having a hollow portion that opens at least at a connection side end via a connection member,
The connection member includes a pair of insertion portions that are respectively inserted into the hollow portions of the pair of connected members, and an intermediate portion that is positioned between the pair of insertion portions, and each of the pair of insertion portions. It is integrally configured with a hollow extruded profile whose extrusion direction is the direction perpendicular to both the insertion directions,
The hollow portion is partitioned by a skin having a pair of first opposing surfaces and a pair of second opposing surfaces,
A pair of said 1st opposing surface is mutually pressed inside by the 1st fastening means which consists of a volt | bolt and nut which are installed along the said extrusion direction, and a pair of said 2nd opposing surface is orthogonal to the said extrusion direction Pressed inward by the second fastening means installed in the direction,
The insertion portion is sandwiched and fixed between the pair of first opposing surfaces, and is sandwiched and fixed between the pair of second opposing surfaces,
The insertion portion is provided cylindrical guide portion for receiving the fastening shaft force of the first tightening hand stage has an inner peripheral surface of circular cross section which surrounds the shaft portion of the bolt extends in the extrusion direction And a rib that is provided along the insertion position of the second fastening means and that receives the fastening axial force of the second fastening means,
The cylindrical guide portion is formed to protrude forward in the insertion direction at the distal end portion of the insertion portion,
The said rib is formed in the base end side of the said insertion part rather than the said cylindrical guide part. The connection structure characterized by the above-mentioned. 2. The connection structure according to claim 1, wherein the pair of members to be connected is configured by a hollow extruded shape member made of aluminum or an aluminum alloy having a rectangular cross section.

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