JP6292411B2 - Crush prevention tool for grooved steel joints - Google Patents

Description

  The present invention relates to a grooved steel connecting part in a frame structure rack or the like, i.e., a grooved steel connecting part for connecting the grooved steel and other articles to each other by bolts penetrating both side plate parts of the grooved steel. The present invention relates to a crush prevention tool to be used.

  For example, in a lattice structure side frame structure that supports the rack structure of a rack with a frame structure, grooved steel (including grooved steel with a lip) is used as a lattice material installed between a pair of front and rear columns. Has been. This channel steel is extremely light compared to a square steel tube with the same size and can greatly reduce the cost. However, for example, between channel steel When the bolts are connected, if the bolts are tightened too much, the channel steel will be deformed in a direction in which both side plate portions approach each other. Accordingly, even if the weight is somewhat increased and the cost is somewhat increased, a square steel pipe is used as a lattice material as described in Patent Document 1. In the configuration described in Patent Document 1, a square steel pipe is used as a lattice material. However, the end of the square steel pipe is inserted into the inside of a column having a groove-shaped cross section and penetrates between left and right side plates of the column. Unlike the case where the ends of two square steel pipes are stacked and attached to the column, when the end of one square steel tube is attached to the column, the bolts are tightened to tighten the left and right sides of the column. The plate portion is deformed inward. In order to avoid this inconvenience, in Patent Document 1, a distance piece is interposed between the end portion of one square steel pipe and the side plate portion on one side of the support column. In other words, if the strut having a cross section is viewed as a channel steel, and the distance piece has a width equal to the width between the left and right side plate portions of the channel steel, It is considered that the distance piece functions as a crush prevention tool that prevents deformation of the left and right side plates of the steel.

JP 2002-58545 A

  However, for example, when two groove steels are connected to each other with bolts and nuts to form a cross lattice or a horizontal connection body, or in a state where one surface of the groove steel is in contact with the side surface of another member, When connecting with bolts and nuts, when trying to use a distance piece as shown in Patent Document 1 as a tool to prevent crushing of the grooved steel, the width equal to the width between the left and right side plate portions of the grooved steel In addition to the need for a large distance piece, there is no member used for positioning the distance piece as disclosed in Patent Document 1 inside the grooved steel, so that it is difficult to position the distance piece with respect to the bolt. In particular, when the channel steel is a channel steel with a lip, a large distance piece that fits exactly between the left and right side plate parts of the channel steel is fitted to the bolt with the right and left It is very difficult to set between both side plate portions, and the practicality is poor.

  The present invention proposes a collapsible preventing tool for the grooved steel connecting part capable of solving the conventional problems as described above, and the collapsible preventing tool for the grooved steel connecting part according to the present invention includes: In order to make it easier to understand the relationship with the examples described later, the reference numerals used in the description of the examples are shown with parentheses, and bolts that penetrate the both side plates (15) of the channel steel ( 24) is a crush prevention tool (18) used in a grooved steel connecting portion for connecting the grooved steel and other articles to each other, and abuts against the outer side of the side plate portion (15) on one side of the grooved steel. A side wall (20) and a bottom wall having a length that is continuous from the side wall (20) to the side between the side plates (15) of the channel steel and not longer than the width of the channel steel ( 19) provided with an L-shaped member, the side wall portion (20) is provided with a mounting through hole (22) through which the bolt (24) is inserted, and the bottom wall portion (19) The channel steel Side plates (15) fitted between the fitting portion for preventing the deformation in the direction in which the side plates (15) approach each other (23) has a configuration provided.

  When the collapsible prevention tool having the above-described configuration is incorporated into the grooved steel, first, the corners between the side wall portion and the bottom wall portion of the L-shaped member are arranged on the open side between the side plate portions of the grooved steel. The fitting portion is fitted between the both side plate portions of the grooved steel so that the member connected to the grooved steel is abutted against the corner of the both corners, and the side wall The portion is brought into contact with the outside of the side plate portion on one side of the channel steel. Then, in a state where the mounting through hole in the side wall portion is aligned with the bolt hole on the channel steel side, the bolt is passed through the mounting through hole and the bolt hole on the channel steel side. In this state, as long as the bolt does not fall out, the position and posture of the crush prevention tool (L-shaped member) are fixed with respect to the grooved steel, and the crush prevention tool may swing around or fall off around the bolt. After that, the channel steel can be connected and fixed to another member by using the bolt.

  As described above, according to the crush prevention device of the present invention, when the grooved steels are connected with bolts, or when the grooved steel is connected to other members with bolts, the bolts are attached to the side wall portions. As long as it is inserted through the through-hole for use, it is not necessary to position the crush prevention tool with the fingertip during the bolt tightening operation, and even if the bolt is loose, the crush prevention tool may fall off unexpectedly. And the crush prevention tool can be assembled at a predetermined position of the channel steel very easily. Finally, when the bolts are tightened to complete the connection between the channel steels or the connection of the channel steels to other members, even if the bolts are overtightened, the channel steels The deformation of the plate portions so as to approach each other can be reliably prevented by the fitting portion of the crush prevention tool. Of course, as compared with the case of using a distance piece that fits into a bolt in a grooved steel as described in Patent Document 1, the crush prevention device of the present invention can only be configured to be small and light. In addition, the crush prevention tool can be assembled lightly and surely at a predetermined position of the grooved steel even with respect to the grooved steel with a lip in which the release portion between both side plate portions is narrowed.

  The fitting portion (23) is bent continuously from the side of the bottom wall portion (19) in the longitudinal direction of the grooved steel, and is fitted between both side plate portions (15) of the grooved steel. It can be composed of mating protruding pieces (21). According to this structure, the action direction of the force when the both side plate portions of the channel steel move in the direction approaching each other matches the length direction of the L-shaped corner portion between the bottom wall portion and the protruding piece. Therefore, the L-shaped corner portion between the bottom wall portion and the protruding piece having a very high buckling strength can strongly prevent the both side plate portions of the channel steel from being deformed so as to approach each other. I can do it. In this case, it is effective for maximizing the crushing prevention effect that the protruding pieces (21) are continuously bent from both sides of the bottom wall portion (19) in the channel steel length direction. is there. Further, when the channel steel is a channel steel with a lip having a lip portion (16) continuously provided on the inner side from both side plate portions (15), the bottom wall portion (19) includes both lip portions. It is preferable to have a length that contacts the outer surface of (16) in order to enable stable assembly of the crush prevention device.

FIG. 1 is a schematic perspective view showing the entire rack. FIG. 2 is a partially cutaway front view showing the side frame structure. FIG. 3 is a partially longitudinal front view showing an upper end horizontal coupling body of the side frame structure. FIG. 4 is a partial cross-sectional plan view showing the upper end horizontal coupling body. FIG. 5A is an enlarged view of the central portion of FIG. 4, FIG. 5B is a longitudinal side view of a main part of the upper end horizontal coupling body, and FIG. 5C is a perspective view of a crush prevention tool. FIG. 6 is a partially longitudinal front view of an intermediate portion of the side frame structure. FIG. 7 is a partial cross-sectional plan view of an intermediate portion of the side frame structure.

  Hereinafter, a rack having a frame structure incorporating the crush prevention device of the present invention will be described. The rack shown in FIG. 1 is used for a shelf between two side frame structures 1 arranged at a required interval in the rack front direction. A plurality of horizontal structures 2 are installed at appropriate intervals in the vertical direction. As the horizontal structure 2 for shelves, those having various structures are known, and are not particularly limited. The side frame structure 1 includes a pair of front and rear columns 3a and 3b in the depth direction of the rack, a plurality of upper and lower cross lattices 4a to 4f laid between the pair of front and rear columns 3a and 3b, and an upper end of the uppermost cross lattice 4a. The upper end horizontal connection body 5a laid between the support pillars 3a and 3b, and the lower end horizontal connection body 5b laid between the pair of front and rear support pillars 3a and 3b at the lower end of the lowermost cross lattice 4f. The side frame structure 1 is not limited to the illustrated configuration, and the number of cross lattices to be used is an arbitrary number from a minimum of one according to the scale of the rack. Further, in the case of a rack having a large depth, the side frame structure 1 having the above configuration is arranged in the front and rear of the rack in the depth direction so that the columns 3a and 3b are adjacent to each other back to back, and if necessary, adjacent to each other back to back. It is also possible to configure the supporting columns 3a and 3b to be combined and integrated. Furthermore, depending on the case, one of the horizontal coupling bodies 5a and 5b at the upper and lower ends can be omitted.

  Hereinafter, the detailed structure of the illustrated side frame structure 1 will be described with reference to FIGS. 2 to 7. The pair of front and rear columns 3 a and 3 b have a cross-sectional groove structure composed of a front plate 6 and left and right side plates 7. In the left and right side plates 7, the inner space in the rear half is narrower than the inner space in the front half adjacent to the front plate 6, and the latter half serves as the member mounting plate 8. Further, on the rear side of the left and right side plates 7, a reinforcing bent plate portion 9 bent outward is formed. The pair of front and rear columns 3 a and 3 b are arranged symmetrically in the front-rear direction so that the front plate 6 forms the front and rear end surfaces of the side frame structure 1.

  In the cross lattices 4a to 4f, two lattice materials 10a and 10b are overlapped with each other at the center position in the longitudinal direction and intersect in an X shape, and the intersecting portions are coupled to each other by a bolt nut 11 as a fastener. The upper and lower horizontal coupling bodies 5a and 5b are composed of two horizontal bar bodies 12a and 12b, and a horizontal region is horizontally and laterally extended from the inner end thereof. They are overlapped with each other in the direction, and the center of the overlapping portion and the three locations near both ends are joined and integrated by a bolt and nut 13 as a connector. The lattice materials 10a and 10b constituting the cross lattices 4a to 4f and the horizontal rod-like bodies 12a and 12b constituting the upper and lower horizontal coupling bodies 5a and 5b are composed of a back plate portion 14, left and right side plate portions 15, and a pair of left and right lips. A lip-shaped grooved steel having the same cross-sectional shape and size is used in such a direction that the pair of left and right lip portions 16 are on the lower side, and the lateral width is the left and right of the columns 3a and 3b. The distance between the inner side surfaces of the member mounting plate portions 8 of the side plates 7 is substantially half.

  In the illustrated configuration, when the cross lattices 4a to 4f are arranged in the same direction in the vertical direction, the lattice that inclines in a direction in which the side with the rear column 3b is higher among the lattice materials 10a and 10b of the cross lattices 4a to 4f. The material 10a is all adjacent to the outside with respect to the lattice material 10b which is inclined in the direction in which the side on which the opposite front support column 3a is located becomes higher. Therefore, when the cross lattices 4a to 4f are arranged in the same direction in the vertical direction, the upper ends of the lattice materials 10a and 10b of the lower cross lattices 4b, 4d and 4f and the cross lattices 4a, 4c and 4e on the upper side are arranged. The lower end portions of the lattice materials 10a and 10b can be overlapped with each other in the lateral direction. And the overlap part of the edge part of this upper and lower lattice material 10a, 10b is the width | variety which can just be fitted between the inner surface of the member attachment board part 8 of the right-and-left both-sides board 7 in support | pillar 3a, 3b. Therefore, in a state where the overlapping portion of the ends of the upper and lower lattice materials 10a, 10b is sandwiched between the inner side surfaces of the member mounting plate portion 8, it is fastened by a bolt nut 17 as a fastener that penetrates them horizontally and horizontally. It is fixed.

  The length between both end portions of each horizontal coupling body 5a, 5b (the outer end portions of the horizontal rod-like bodies 12a, 12b) is the lattice material in the cross lattices 4a-4f constructed between the pair of front and rear columns 3a, 3b as described above. The distance between the upper end portions and the lower end portions of 10a and 10b is substantially equal. Since both ends of the horizontal connecting bodies 5a and 5b, that is, the outer end portions of the horizontal rod-like bodies 12a and 12b are shifted in the horizontal direction by the width, the horizontal connecting body 5a at the upper end and the horizontal ends at the lower end are horizontal. By arranging the connecting body 5b in the reverse direction, the outer end portion of the horizontal rod-like body 12b positioned inside the upper end horizontal connecting body 5a is arranged inside the upper end portion of the lattice material 10a positioned outside the upper cross lattice 4a. And the outer end portion of the horizontal rod-like body 12a positioned outside the upper horizontal coupling body 5a can be superimposed on the outer side of the upper end portion of the lattice material 10b positioned inside the cross lattice 4a at the upper end. Similarly, the outer ends of the horizontal rod-like bodies 12b and 12a of the horizontal connecting body 5b at the lower end can be overlapped with the lower ends of the lattice members 10a and 10b of the cross lattice 4f at the lower end in the horizontal horizontal direction. And the overlap part of the edge part of this lattice material 10a, 10b and the both ends of horizontal connection body 5a, 5b is just fitted between the inner surface of the member attachment board part 8 of the right-and-left both-sides board 7 in support | pillar 3a, 3b. Therefore, the overlapping portion is clamped and fixed by a bolt and nut 17 penetrating horizontally in a state of being sandwiched between the inner side surfaces of the member mounting plate portion 8.

  A collapsible prevention tool 18 according to the present invention is incorporated in a connecting portion of the horizontal connecting bodies 5a and 5b by the bolts and nuts 13 between the horizontal rod-like bodies 12a and 12b. The crush prevention tool 18 is manufactured from a steel plate having the same thickness as the plate material (the left and right side plates 7) constituting the support columns 3a and 3b, and as shown in FIG. A side wall portion 20 that rises perpendicular to the wall portion 19, a pair of left and right projecting pieces 21 that are bent upward from the left and right sides of the bottom wall portion 19, and a mounting through hole 22 provided in the side wall portion 20. It has. The bottom wall portion 19 is not longer than the width of the grooved steel forming the horizontal rod-like bodies 12a and 12b, but has a length that can contact the outer surfaces of the left and right lip portions 16, The pair of left and right protruding pieces 21 has a width that can be fitted between the lip portions 16 of the grooved steel forming the horizontal rod-like bodies 12a and 12b. In order to prevent the left and right side plate portions 15 of the grooved steel from being deformed in the direction of approaching each other, the fitting portion 23 to be fitted between the left and right side plate portions 15 (between the left and right lip portions 16) is provided. Is formed.

  Said crush prevention tool 18 is integrated in each connection part by the bolt nut 13 of the two horizontal rod-shaped bodies 12a and 12b as follows. That is, the fitting portion 23 (a pair of left and right projecting pieces 21) is fitted between the lip portions 16 of the grooved steel constituting the horizontal rod-like bodies 12a and 12b, and the bottom wall portion 19 is attached to both the lip portions 16. While abutting on the outside, the side wall portion 20 is abutted on the outside of the side plate portion 15 on the side where the other horizontal rod-like bodies 12a or 12b do not overlap among the left and right side plate portions 15 of the channel steel, Horizontal bar-like bodies 12a and 12b arranged in parallel with each other using the bolt holes provided in the side plate portion 15 of the channel steel and the mounting through-holes 22 of the side wall portion 20 matched with the bolt holes, The bolt 24 of the bolt nut 13 is inserted through the side wall portions 20 of the two crush prevention tools 18 positioned so as to sandwich them, and the nut 25 is screwed and fastened to the bolt 24.

  Even if the fastening force by the bolt nut 13 is excessive due to the incorporation of the crush prevention tool 18 into the bolt nut 13 that connects the two horizontal rod bodies 12a, 12b to each other as described above, these horizontal rod bodies The fitting part 23 (a pair of left and right protruding pieces 21) of the crush prevention tool 18 prevents the left and right side plate parts 15 of the grooved steel constituting 12a and 12b from being deformed so as to approach each other. become. Further, the entire width of the connecting portion to which the bolt and nut 13 are connected, that is, the distance D1 between the outer side surfaces of the side wall 20 of the collapsible prevention device 18 on both the left and right sides sandwiching the two parallel horizontal rods 12a and 12b (FIG. 5). Since the side wall portion 20 has the same thickness as the plate material (the left and right side plates 7) constituting the support columns 3a and 3b, the member mounting plate portion on the left and right side plates 7 of the support columns 3a and 3b. 8 is substantially equal to the distance D2 between the outer surfaces (see FIG. 4).

  Further, as described above, the upper and lower lattice materials 10a and 10b in the cross lattices 4a to 4f are also made of groove steel having the same structure and the same size as the groove steel constituting the horizontal rod bodies 12a and 12b. Therefore, the overlap between the both ends of the horizontal coupling bodies 5a and 5b (the outer ends of the horizontal rod-like bodies 12a and 12b) and the free ends of the lattice members 10a and 10b in the cross lattices 4a and 4f immediately below or directly above the horizontal coupling bodies 5a and 5b. The connecting portion for connecting the portions by the bolt nut 17 between the member mounting plate portions 8 on the left and right side plates 7 of the columns 3a and 3b, and the overlapping end portions of the upper and lower lattice materials 10a and 10b in the cross lattices 4a to 4f are used as the column 3a. , 3b are connected to each other by bolts and nuts 17 between the member mounting plate portions 8, and each bolt nut incorporating the collapsible prevention tool 18 of the horizontal connecting bodies 5a, 5b is also used. A coupling portion by preparative 13 becomes the same conditions. Furthermore, also in the connection part which connects the cross | intersection part of the lattice materials 10a and 10b in the cross lattices 4a and 4f with the bolt nut 11, as shown in FIG.6 and FIG.7, as shown in FIG.6 and FIG.7, the said collapse prevention tool 18 of each lattice material 10a, 10b. It can be incorporated in the penetration part of the bolt 24.

  By configuring as described above, the tightening conditions by the bolt nuts 11, 13, and 17 are the same for each connecting portion using the bolt nuts 11, 13, and 17 in the side frame structure 1. As the nuts 11, 13 and 17, bolts and nuts having the same structure and the same size can be used. Therefore, each bolt nut 11, 13, 17 uses a bolt 24 and a nut 25 having a screw shaft portion 24 a having a required minimum length and a required minimum length at the tip, and thus, the Even if the projecting length of the bolt 24 is minimized and the bolt 24 / nut 25 is tightened with an excessive tightening force by an impact driver without adjusting the fastening torque, the lattice members 10a and 10b and the horizontal rod-like body The deformation of 12a and 12b can be minimized. Of course, since it is not necessary to prepare a plurality of types of bolts and nuts having different sizes, the overall cost can be reduced and workability can be improved.

  It should be noted that both ends of the lattice materials 10a and 10b constituting the cross lattices 4a to 4f and outer ends attached to the columns 3a and 3b of the horizontal rod-like bodies 12a and 12b constituting the horizontal coupling bodies 5a and 5b at the upper and lower ends. Can attach a plug-type crush prevention tool 26 of the type inserted into the inside from the end of the grooved steel constituting the lattice members 10a, 10b and the horizontal coupling bodies 5a, 5b.

  The collapsible preventing tool for the grooved steel connecting part according to the present invention is, for example, a grooved steel bolt constituting the side frame structure of the rack of the frame structure, and the deformation of the grooved steel due to overtightening of the bolt is performed. It can be used as a means to prevent.

DESCRIPTION OF SYMBOLS 1 Side frame structure 2 Shelf horizontal structure 3a, 3b Support | pillar 4a-4f Cross lattice 5a, 5b Horizontal connection body 6 Front plate of support | pillar 7 Both right-and-left board of support | pillar 8 13, 17 Bolt nut 12a, 12b Horizontal rod 14 Back plate part of channel steel 15 Left and right side plate part of channel steel 16 Lip part of channel steel 18 Crush prevention tool 19 Bottom wall part of crush prevention tool 20 Crush prevention Side wall 21 of the tool 21 A pair of left and right projecting pieces 22 of the collapsible preventive tool 22 A mounting through hole 23 A fitting part 24 for preventing the collapsing 24 Bolt 24a Screw screw shaft 25 Nut 26 Insertion-type collapsible preventing tool

Claims (4)

  A crush prevention tool used for a grooved steel connecting part for connecting the grooved steel and other articles to each other by bolts penetrating both side plate parts of the grooved steel, the outer side of the side plate part on one side of the grooved steel And an L-shaped member provided with a side wall portion that is in contact with the side wall portion and a bottom wall portion that is continuous from the side wall portion to the side between the side plate portions of the grooved steel and has a length not longer than the width of the grooved steel. The side wall portion is provided with a mounting through-hole through which the bolt is inserted, and the bottom wall portion is fitted between both side plate portions of the channel steel, and the both side plate portions are mutually connected. A tool for preventing crushing of a grooved steel connecting portion, which is provided with a fitting portion that prevents deformation in the approaching direction.   The fitting portion is formed of a protruding piece that is bent from the side of the bottom wall portion in the longitudinal direction of the channel steel and is fitted between both side plate portions of the channel steel. Item 2. An apparatus for preventing crushing of a grooved steel joint according to Item 1.   The said protrusion piece is a crush prevention tool of the channel steel connection part of Claim 2 each bent and provided from the both sides of the channel steel length direction of the said bottom wall part. The grooved steel is a grooved steel with a lip having a lip portion provided inward from both side plate portions , and the bottom wall portion has a length that abuts against the outer surfaces of both lip portions. The collapsible prevention tool of the channel steel connection part of Claim 2 or 3.

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