JP2017006510A - Rack connection member mounting structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve a mounting structure of a connection member such as a horizontal connection member and a brace for connecting vertical frame structures arrayed in the frontage direction of a rack to each other.SOLUTION: There is used a bolt 17a, in which a region adjacent to a bolt head 18 and having a length substantially equal to the plate thickness of a connection member mounting plate 13, is made into a large-diameter inversely threaded helical shaft portion 19 of a large diameter screwed inversely to the positive screw shank 20. In the connection member mounting plate 13 attached to a strut 2b, there is formed a projecting plate part 14c for forming a space, in which the head 18 of the bolt is fitted, between the projecting plate part 14c and the outer side face of the strut. The projecting plate part 14c is formed with a counter screw through hole 16a, in which the large-diameter inversely threaded helical shaft portion 19 is screw-threaded. Connection members 10b and 11 are formed in their end portions with mounting holes 22a and 23a for fitting around the positive screw shank 20 protruding from the counter screw through hole. By a nut 21 screwed on the positive screw shank 20 of the bolt protruding from the mounting holes, the end part of the connection member is pushed and fixed on the surface of the connection member mounting plate 13.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a mounting structure for a connecting member such as a horizontal connecting member or a brace that connects vertical frame structures arranged in a rack front direction.

  As shown in Patent Document 1, a general rack having a frame structure is composed of a vertical frame structure having a lattice structure arranged on both sides of a load supporting space, such as a horizontal connecting member (horizontal beam member) and a brace. In addition to being connected and integrated by the connecting member, a load supporting member for supporting the load is attached to the vertical frame structure. The vertical frame structure is generally formed by connecting and integrating a pair of front and rear columns with a lattice material, and ends of the various connection members are bolted to the columns. Thus, in particular, for attachment of a connecting member such as a brace where a large force acts, it is necessary to attach with a thick bolt having a relatively large shaft diameter. The brace is also attached to the column with one bolt by overlapping the end of the diagonally upward brace and the end of the diagonally downward brace. In this case, in consideration of the safety of work at high places, the bolts are fixed in advance to the column side, and when installing the brace, the ends of the two braces are attached to the bolts fixed to the column side. It is configured so that it only needs to be fitted and fastened with a nut.

JP 2001-287815 A

  In the configuration described in Patent Document 1, a pair of left and right bolts are connected from the back side of the support column to the support column by using an inwardly bent plate portion formed at an intermediate position in the front and rear depth direction of the left and right side plate portions of the support column. At the same time that the mounting plate is inserted into the front surface side of the support column and screwed through a pair of left and right through screw holes provided on the mounting plate that contacts the surface side of the support column. A connecting member such as a brace can be fixed to the surface of the mounting plate by using a screw shaft portion of a protruding bolt and a nut screwed into the screw shaft portion. In this configuration, as described above, the bolt for attaching the connecting member can be fixed in advance to a predetermined portion of the support column, but at the middle position in the front-rear depth direction of the left and right side plate portions of the support column, It is necessary to secure a wide inwardly bent plate portion having a bolt insertion hole through which a bolt with a large shaft diameter can be inserted so as to be rotatable. For this reason, there has been a problem that the lateral width of the support becomes larger than necessary in terms of strength.

  The present invention proposes a rack connecting member mounting structure capable of solving the above-described conventional problems, and the rack connecting member mounting structure according to the present invention is the same as the embodiment described later. To facilitate understanding of the relationship, the reference numerals used in the description of the embodiment are shown in parentheses, and the connecting member mounting plate (13) is attached to the rack column (2b). In the rack connecting member mounting structure in which the ends of the connecting members (10b, 11) are fixed to the plate (13) with bolts, the bolts are adjacent to the bolt head (18) and connected to the connecting member mounting plate (13 Bolts (17a, 17b) having an area of the same length as the plate thickness of the bolts and having a large-diameter reverse screw threaded shaft part (19) that is a reverse screw with the screw threaded part (20) of this bolt And the head of the bolt (17a, 17b) between the connecting member mounting plate (13) and the outer surface of the column (2b) (1 8) A projecting plate portion (14c) that forms a space for fitting is formed, and the large-diameter reverse screw threaded shaft portion (19) of the bolt (17a, 17b) is screwed into the projecting plate portion (14c). The reverse screw through hole (16a, 16b) is provided, and the mounting hole (22a) that is externally fitted to the positive screw screw shaft portion (20) of the bolt (17a, 17b) protruding from the reverse screw through hole (16a, 16b) , 23a) is provided at the end of the connecting member (10b, 11), and is screwed onto the positive screw threaded shaft (20) of the bolt (17a, 17b) protruding from the mounting hole (22a, 23a). The nut (21) is configured to press and fix the end of the connecting member (10b, 11) to the surface of the connecting member mounting plate (13).

  According to the above configuration of the present invention, the connecting member mounting bolt is attached to the connecting member mounting plate separately from the fixture (rivet or the like) for mounting the connecting member mounting plate to the support column. Regardless of the required number of bolts for attaching the connecting members, the fixtures used to attach the plate to the column are connected with the required mounting strength using multiple fixtures with thin shaft diameters according to the cross-sectional structure of the column. The member mounting plate can be attached to the column. In addition, the connecting member mounting bolt has a large-diameter reverse screw screw shaft portion in the reverse screw through hole of the protruding plate portion so that its head is pressed against the back surface of the protruding plate portion of the connecting member mounting plate. By simply rotating and mounting in the screw unwinding direction opposite to the screw tightening direction, it can be firmly fixed at a predetermined position, and the bolts protruding from the connecting member mounting plate can be fixed even at the height of the rack. A connecting member such as a brace can be easily attached by using the screw screw shaft portion by a conventional rotational operation in the screw tightening direction of the nut.

  Moreover, since the bolt is slightly loosely attached to the connecting member mounting plate, even if the bolt rotates together in the screw tightening direction of the nut when fixing the connecting member, The co-rotating direction is the tightening direction of the large-diameter reverse screw screw shaft portion with respect to the reverse screw through-hole, so that the bolt is further tightened against the connecting member mounting plate, and the connecting member such as the brace is surely secured. It can be firmly attached to. Further, since the large-diameter reverse screw screw shaft portion of the bolt is screwed and fastened to the reverse screw through hole of the connecting member mounting plate, the connecting member such as a brace is connected to the connecting member mounting plate, which is very close to its elastic limit. Even when a load is applied via the bolt, there is no fear that the bolt tilts in the direction of the load with respect to the connecting member mounting plate. That is, in the case of a configuration in which the corner portion of the bolt is fitted into the corner hole of the connecting member mounting plate to prevent the bolt from rotating, the space between the corner portion of the bolt and the corner hole of the connecting member mounting plate As a result of this play, the bolt tilts in the direction of the load, and one part of the periphery of the head of the bolt bites into the back surface of the connecting member mounting plate, and the back surface of the connecting member mounting plate is recessed. Eventually, the nut will loosen, but such a problem does not occur in the configuration of the present invention.

  When the configuration of the present invention is implemented, the protruding plate portion (14c) of the connecting member mounting plate (13) is continuous over the entire horizontal width at the intermediate height of the connecting member mounting plate (13). Forming the above-mentioned reverse screw through holes (16a, 16b) at both ends in the length direction of the horizontally long projecting plate portion (14c), and each of the pair of left and right reverse screw through holes (16a, 16b) The bolts (17a, 17b) can be attached to the connecting member mounting plate (13), and the four corners of the connecting member attaching plate (13) can be attached to the support column by a fixing tool (rivet (15)). According to this configuration, it is possible to secure a pair of left and right connecting member mounting bolts necessary when mounting the connecting members arranged on the left and right sides of the support column to the support column, and at the same time, including the pair of left and right connecting member mounting bolts. The connecting member attachment plate can be firmly attached to the support column by the four fixtures.

FIG. 1 is a rear view of the main part of the rack. FIG. 2 is a plan view of the main part of the rack. FIG. 3 is a side view of the main part of the rack. FIG. 4 is a rear view of the main part showing the attachment structure of the connecting member to the support column. FIG. 5 is a longitudinal side view of the main part showing the attachment structure of the connecting member to the support column. FIG. 6 is a cross-sectional plan view of the main part showing the attachment structure of the connecting member to the support column. FIG. 7 is an exploded rear view of the main part for explaining the attachment structure of the connecting member to the support column. FIG. 8 is an exploded cross-sectional plan view of the main part for explaining the attachment structure of the connecting member to the support column. FIG. 9A is a transverse plan view for explaining a method of attaching a bolt to a connecting member mounting plate, and FIG. 9B is a perspective view of the connecting member mounting plate to which the bolt is attached.

  In FIG. 1 to FIG. 3, reference numeral 1 denotes a partition vertical frame structure, which is erected at a predetermined interval in a rack front direction. Each partition vertical frame structure 1 has a lattice structure composed of a pair of front and rear columns 2a and 2b and a lattice material 3 that connects and integrates the pair of front and rear columns 2a and 2b. Between the vertical frame structures 1 for partitions adjacent to each other in the frontage direction of the rack, there are formed a plurality of upper and lower load support sections 5 each having a pair of left and right load support members 4 supporting the left and right sides of the load W to be handled. Has been. The pair of front and rear struts 2a and 2b use a steel plate made of a front plate portion 6 and left and right side plate portions 7, and are arranged in a front-rear symmetrical orientation in which the front plate portion 6 is located outside. The front and rear ends of each load supporting member 4 are attached to a pair of front and rear columns 2a and 2b via arm members 8a and 8b and attachment members 9a and 9b parallel to the rack frontage direction.

  The front struts 2a and the rear struts 2b of the vertical frame structure 1 for partitioning on both the left and right sides of each load support section 5 are connected by horizontal connecting members 10a and 10b at a position directly below each load support member 4. The rear struts 2b are connected to each other by crossing vertical surface braces 11, and the pair of front and rear horizontal connecting members 10a and 10b located at the same height are alternately arranged in the direction of the front of the rack. By being connected by different horizontal plane lattice materials 12, the partition vertical frame structures 1 are connected and integrated to form a rack that can three-dimensionally store the load W.

  The connecting member mounting structure of the present invention in this embodiment is applied as a mounting structure of the horizontal connecting member 10b and the vertical surface brace 11 to the rear column 2b. The specific structure will be described below with reference to FIGS. A connecting member attachment plate 13 is attached to the rear column 2b outside the front plate portion 6 thereof. The connecting member mounting plate 13 is positioned on the upper and lower mounting plate portions 14a and 14b having the same width as the front plate portion 6 of the rear column 2b, and is continuously located outside in the horizontal direction. As shown in FIG. 8, rivet insertion holes 15a are provided in the vicinity of the left and right ends of the upper and lower mounting plate portions 14a and 14b. The left and right lateral width of the protruding plate portion 14c is wider than the width of the front plate portion 6 of the rear column 2b, and reverse screw through holes 16a and 16b are provided at positions near the left and right ends of the protruding plate portion 14c. Before attaching the connecting member attaching plate 13 to the front plate portion 6 of the rear column 2b, the horizontal connecting member 10b and the vertical surface brace 11 as connecting members are attached using the reverse screw through holes 16a and 16b. Bolts 17a and 17b are attached.

  The bolts 17 a and 17 b include a head 18, a large-diameter reverse screw screw shaft portion 19, and a positive screw screw shaft portion 20, and the head 18 is a protruding plate portion 14 c in the connecting member mounting plate 13. It is of a size that can be rotated in the inner space of the, and has a thickness that fits in the inner space of the protruding plate portion 14c. The large-diameter reverse screw threaded shaft portion 19 is adjacent to the head 18 and has a length approximately the same as the thickness of the protruding plate portion 14c (the length of the reverse screw through holes 16a and 16b). The holes 18a and 16b are screwed from the inside of the protruding plate portion 14c to the state in which the head 18 comes into contact with the inner back surface of the protruding plate portion 14c by the rotation operation in the screw unwinding direction opposite to the normal screw tightening direction. Can be fastened together. The normal screw screw shaft portion 20 has an outer diameter smaller than the inner diameter of the reverse screw through-holes 16a and 16b, and the nut 21 can be screwed from the tip of the nut 21 by a rotation operation in a normal screw tightening direction. . The bolts 17a, 17b are inserted into the reverse screw through holes 16a, 16b from the inside of the protruding plate portion 14c of the connecting member mounting plate 13 and the large-diameter reverse screw screw shaft portion 19 is inserted. The head 18 is screwed and fastened to the reverse screw through holes 16a and 16b so that the head 18 is pressed against the inner back surface of the protruding plate portion 14c by a rotation operation in the screw return direction with respect to the head 18. As a result, the positive screw threaded shaft portions 20 of the bolts 17a and 17b protrude in a fixed state from the positions near the left and right ends of the protruding plate portion 14c in the connecting member mounting plate 13, respectively.

  Rivet insertion holes are provided at predetermined heights in the front plate portion 6 of the rear column 2b so as to coincide with the rivet insertion holes 15a at the four corners of the connecting member mounting plate 13, respectively. As described above, the pair of left and right bolts 17a and 17b are attached by a rivet 15 (such as a rivet referred to as a blind fastener) inserted through the rivet insertion hole and the rivet insertion holes 15a at the four corners of the connecting member mounting plate 13. The connected connecting member mounting plate 13 is mounted at a predetermined height in the front plate portion 6 of the rear column 2b. At this time, the heads 18 of the bolts 17a and 17b are located between the front plate portion 6 of the rear column 2b and the protruding plate portion 14c of the connecting member mounting plate 13, and are in pressure contact with the front plate portion 6. Absent.

  As shown in FIG. 7, the horizontal connecting member 10b installed between the rear support columns 2b is provided with mounting plate portions 22 formed by pressing and deforming the round pipe material in a flat shape at both ends of the round pipe material. The attachment plate portions 22 at both ends are provided with bolt insertion holes 22a. The vertical surface brace 11 is a conventionally known turnbuckle-type length-adjustable, and is provided with attachment plate portions 23 provided with bolt insertion holes 23a at both ends.

  The horizontal connecting member 10b corresponds to the pair of left and right bolts 17a and 17b protruding from the connecting member mounting plate 13 attached to the rear column 2b through the bolt insertion holes 22a of the mounting plate portions 22 at both ends. It is fitted to the positive screw threaded shaft portion 20 of the bolt located on the side to be temporarily supported. Next, the mounting plate portion 23 of the vertical surface brace 11 to be attached to the mounting plate portion 22 of the horizontal connecting member 10b is attached to the positive screws of the bolts 17a and 17b protruding from the mounting plate portion 21 of the horizontal connecting member 10b. A bolt insertion hole 23a is fitted to the screw shaft portion 20 to be temporarily supported at a predetermined angle, and finally, to the positive screw screw shaft portion 20 of the bolts 17a and 17b protruding from the mounting plate portion 23 of the vertical surface brace 11. The nut 21 is rotationally operated in a normal screwing direction and screwed, and is fitted to the positive screw threaded shaft portion 20 of the bolts 17a and 17b. The mounting plate portion 22 of the member 10b is sandwiched and fixed between the protruding plate portion 14c of the connecting member mounting plate 13.

  In the illustrated embodiment, the two horizontal connecting members 10b and two of the horizontal connecting members 10b are disposed on both sides of the rear support column 2b at two vertical plane braces 11 that are inclined symmetrically with the horizontal connecting member 10b. The attachment structure of the vertical surface brace 11 is shown. Therefore, each of the pair of left and right bolts 17a and 17b of the connecting member mounting plate 13 of the rear column 2b includes the total of the mounting plate portion 22 of the horizontal connecting member 10b and the mounting plate portions 23 of the upper and lower vertical braces 11. The three attachment plate portions 22 and 23 are fastened together by the nut 21. However, although not shown in the drawing, the rear column 2b located at both ends in the front direction of the rack has the horizontal connecting member 10b and the vertical surface brace 11 on one side attached to the rear column 2b. Of the pair of left and right bolts 17a and 17b, only one of the necessary bolts may be attached to the connecting member attaching plate 13 attached to the side support 2b. Although not shown, the vertical brace 11 is attached to the connecting member mounting plate 13 at the upper and lower ends of the rack, so that the bolts 17a and 17b are connected to the horizontal connecting member 10b and one vertical member. A total of two mounting plate portions 22 and 23 of the face brace 11 are fastened together with the nut 21.

  Further, the mounting structure of the front horizontal connecting member 10a installed between the front columns 2a adjacent in the rack front direction to the front columns 2a may be any. For example, the mounting plate portions 22 at both ends of the horizontal connecting member 10a can be bolted directly to the front plate portion of the front column 2a using the bolt insertion holes 22a of the mounting plate 22 but the rear column 2b. The same member as the connecting member mounting plate 13 attached to the front plate 2a is attached to the front plate portion of the front support column 2a with a rivet 15 or the like, and the bolts 17a and 17b and the nut 21 of the connecting member mounting plate 13 are used to It is also possible to attach the attachment plate portions 22 at both ends to the front column 2a.

  The rack connecting member mounting structure of the present invention can be utilized as a mounting structure for connecting members such as horizontal connecting members and braces that connect the vertical frame structures arranged in the frontage direction of the rack.

DESCRIPTION OF SYMBOLS 1 Vertical frame structure for partitions 2a, 2b A pair of front and rear columns 4 Load support member 5 Load support section 6 Front plate portion of rear column 7 Left and right side plates 10a, 10b of horizontal column 11 Vertical connection brace 12 Horizontal plane lattice material 13 Connecting member mounting plate 14a, 14b Vertical mounting plate portion 14c Projecting plate portion 15 Rivet 15a Rivet insertion hole 16a, 16b Reverse screw through hole 17a, 17b Bolt 18 Bolt head 19 Bolt large diameter reverse screw screw shaft Part 20 Bolt screw threaded part 21 Nut 22, 23 Mounting plate part 22a, 23a Bolt insertion hole

Claims (2)

  In a rack connecting member mounting structure in which a connecting member mounting plate is attached to a rack column, and an end of the connecting member is fastened to the connecting member mounting plate with a bolt, the bolt is adjacent to the bolt head and the connecting member. Using a bolt having an area approximately the same as the plate thickness of the mounting plate as a reverse screw and a large diameter reverse screw screw shaft portion of this bolt, A reverse screw that forms a protruding plate portion that forms a space in which the head of the bolt is fitted between the outer surface of the column and the large-diameter reverse screw screw shaft portion of the bolt is screwed into the protruding plate portion. A through hole is provided, and a mounting hole that is externally fitted to the positive screw screw shaft portion of the bolt protruding from the reverse screw through hole is provided at an end portion of the connecting member, and the positive screw screw shaft of the bolt protruding from the attachment hole The connecting portion by a nut screwed into the portion Comprising the end presses fixed to the surface of the connecting member attachment plate, the connecting member attachment structure of the rack.   The projecting plate portion of the connecting member mounting plate is formed in a horizontally long continuous width across the entire horizontal width at the intermediate height of the connecting member mounting plate. A screw through hole is formed, and the bolt is attached to each of the pair of left and right reverse screw through holes via the large-diameter reverse screw screw shaft portion, and the four corners of the connecting member mounting plate are attached to a column by a fixture. The rack connecting member mounting structure according to claim 1.

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