JP2005080408A - Connecting member for cable rack - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a connecting member for cable racks wherein electrically connecting work can be simultaneously conducted by untroublesome mechanically connecting work. <P>SOLUTION: The connecting member for cable racks comprises a coupling member 1 one end 11 of which is fixed at the connecting end of a cable rack 4, and the other end 12 of which is protruded from the connecting end; and a bolt 2 and a nut 3 for overlapping the protruded ends of the coupling members 1 respectively fixed on cable racks 4 to be coupled with each other, and rotatably connecting the coupling members 1. Projections 20 and 30 that bite into the outer surfaces of the coupling members 1 are formed at the head 21 of the bolt 2 and the portion of the nut 3 to be abutted against the coupling member 1. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a connecting member of a cable rack used for wiring a cable.

  Conventionally, cable racks are used to route cables. As shown in FIG. 6, the cable rack is formed by laying child beams 42 at a predetermined interval between a pair of opposed parent beams 41. For example, the cable rack is arranged below the ceiling with a hanging tool attached to the ceiling surface. Established. Then, the cable is placed on the child beam 42 of the cable rack 4 and wired.

  In such a cable rack 4, a plurality of cable racks 4 are connected in the longitudinal direction and arranged below the ceiling. However, when adjacent cable racks 4 are connected in a straight line, the adjacent cable racks 4 are arranged. The joint member is fixed and connected across the outer surface of the end portion of the main beam 41 that is butted against each other. When adjacent cable racks 4 are connected so as to form an angle (that is, the longitudinal direction is not straight) (see FIG. 6), a connecting member described below is attached to the connection end of the cable rack 4. Connect.

  As shown in FIG. 7, the connecting member includes a connecting member 1 'and bolts and nuts 3'. The connecting member 1 ′ has one end fixed to a connection end of one cable rack 4 with a bolt 51 ′ and a nut 52 ′ and the other end protruding from the connection end. 4 is attached to each. Then, the protruding ends of the connecting member 1 ′ attached to the connecting ends of both cable racks 4 are overlapped at an arbitrary angle, and this portion is fixed with bolts and nuts 3 ′ to complete the mechanical connection. To do.

  Incidentally, since the cable rack 4 to be connected needs to be electrically connected in addition to the mechanical connection, the conventional cable rack 4 has a conductive wire between the cable racks 4 as shown in FIG. 6 were electrically connected, but in this case, it was necessary to perform completely different operations of mechanical connection and electrical connection, and the workability was poor. Then, what considered performing mechanical connection and electrical connection by the same operation | work was considered (refer patent document 1).

In this Patent Document 1, a large diameter portion having a diameter larger than the shaft portion is formed on the outer surface of the base portion of the shaft portion of the bolt, and the shaft portion of the bolt is inserted into the bolt insertion hole of the connecting member. By inserting the insertion hole so as to expand at the large-diameter portion, the connecting member and the bolt are reliably brought into contact / conduction. However, in this case, since the work of enlarging the large-diameter portion of the bolt through the bolt insertion hole of the connecting member is performed, a very large force is required and the connecting member may be greatly deformed. There was a problem.
Japanese Patent Publication No. 4-4808

  The present invention has been invented in view of the above-described conventional problems, and the object of the present invention is to connect a cable rack capable of simultaneously performing an electrical connection operation with an easy mechanical connection operation. It is an object to provide a member.

  In order to solve the above-mentioned problem, in the invention according to claim 1, the connecting member 1 in which the one end portion 11 is fixed to the connecting end portion of the cable rack 4 and the other end portion 12 protrudes from the connecting end portion; In the connecting member of the cable rack comprising the bolt 2 and the nut 3 for connecting the projecting end portions of the connecting member 1 fixed to the two cable racks 4 to be connected to each other so as to be rotatable, the bolt 2 Protrusions 20 and 30 that bite into the outer surface of the connecting member 1 are provided at portions of the head 21 and the nut 3 that contact the connecting member 1. By adopting such a configuration, the insertion hole 14 of the connecting member 1 is enlarged at a portion such as a large diameter portion formed in the shaft portion 22 of the bolt 2 to conduct the connecting member 1 and the bolt 2. In addition, the connecting member 1 can be prevented from being deformed or requiring a large force at the time of fastening.

  According to a second aspect of the present invention, in the first aspect of the present invention, an insertion hole 14 through which the shaft portion 22 of the bolt 2 is inserted is formed at the projecting end portion of the two connecting members 1 that overlap each other. A non-circular portion 23 having a non-circular cross section is formed at the base of the portion 22, and the non-circular portion 23 of the bolt 2 is inserted into the insertion hole 14 of the connecting member 1 on the side where the head portion 21 of the bolt 2 abuts. The non-circular hole 14a is characterized in that it is characterized in that With such a configuration, when the connecting member 1 is fastened with the bolt 2 and the nut 3, the non-circular portion 23 of the bolt 2 is fitted into the non-circular hole 14 a of the connecting member 1 and the bolt 2 with respect to the connecting member 1 is inserted. It can be fastened with high torque by preventing rotation.

  The invention of claim 3 is characterized in that, in the invention of claim 2, the non-circular portion 23 of the bolt 2 is accommodated in the non-circular hole 14a of the connecting member 1. With such a configuration, the end surface of the non-circular portion 23 is prevented from coming into contact with the outer surface of the other connecting member 1 and the head portion 21 of the bolt 2 is in a floating state. That is, the non-circular portion 23 of the bolt 2 is accommodated in the non-circular hole 14 a of the connecting member 1.

  In the present invention, there is no deformation of various members by enlarging the insertion hole of the connecting member at a portion such as a large diameter portion formed in the shaft portion of the bolt, and a large force is not required at the time of fastening.

  Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. First, the cable rack 4 will be described. As shown in FIGS. 2 and 6, the cable rack 4 is mainly composed of a pair of parent beams 41 and a plurality of child beams 42 installed between the parent beams 41.

  The main girder 41 is made of a normal metal and is arranged substantially in parallel so as to face both side end portions of the cable rack 4, that is, both end portions in the width (short side) direction. The upper horizontal piece and the lower horizontal piece protrude from the upper and lower end portions to the other parent girder 41 that forms a pair. A plurality of child beams 42 are installed between the pair of parent beams 41. The sub-girder 42 is usually made of metal formed by bending a plate-like member to have a cross-sectional shape, a U-shape, a U-shape with a lip, etc., and the shape is not particularly limited. In the form, it is formed in a U-shape with a lip that opens upward, and this child girder 42 has its both ends fixed to the side vertical pieces of the parent girder 41 by welding or the like.

  Thus, the cable rack 4 which comprises a main body is arrange | positioned under a ceiling in the field via the hanging tool etc. which were attached to the ceiling surface. And the connection to the longitudinal direction of the cable rack 4 is performed by abutting the end portions in the longitudinal direction and fixing the connecting member to the outer surface across the both end portions. A case will be described in which the directions are angled (not straight).

  The connecting member 1 is made of a metal having a substantially plate shape as shown in FIGS. 1 and 2, and one end portion 11 of the connecting member 1 is fixed to a connection end portion of the cable rack 4 (hereinafter, referred to as a fixing portion 11). And the other end portion 12 protrudes from the connection end portion and becomes a overlapping portion (hereinafter referred to as overlapping portion 12) that is overlapped with the connecting member 1 fixed to the other cable rack 4. . The fixing part 11 has a substantially U-shaped cross section in which the upper piece and the lower piece protrude from the upper and lower end portions of the vertical piece portion as the main body, and the vertical piece portion, the upper piece, and the lower piece are respectively on the side of the parent beam 41. It is fitted and attached along the outer surface of the vertical piece, the upper horizontal piece, and the lower horizontal piece. As shown in FIG. 2, fixing tool insertion holes 13 and 43 communicating with overlapping portions of the vertical piece portion of the fixing portion 11 and the side vertical piece of the main girder 41 are formed, and are fixed members including bolts 51 and nuts 52. The connecting member 1 is fixed to the parent beam 41 by inserting and fastening the tool through the fixing tool insertion holes 13 and 43, and the connection between the parent beam 41 and the connecting member 1 is achieved.

  The overlapping portion 12 of the connecting member 1 is a plate-like one extending from the vertical piece portion of the fixed portion 11 in a flat shape, and in this embodiment, the edge 12a on the protruding tip side is formed in an arc shape. The corners are prevented from protruding. An insertion hole 14 is formed in the center portion of the fixed portion 11 (in this embodiment, the center portion of the end edge 12a formed in the arc shape). This insertion hole 14 is for inserting a shaft portion 22 of a bolt 2 of a fastener consisting of a metal bolt 2 and a nut 3 for fixing the connecting members 1 fixed to both cable racks 4. The insertion hole 14 of the connecting member 1 on the side to which the head 21 is fastened is a non-circular hole 14a described later.

Next, the bolt 2 and the nut 3 that fasten the connecting members 1 and the fastening thereof will be described. The bolt 2 is inserted into the insertion hole 14 in which the overlapping portions 12 of both the connecting members 1 are overlapped and communicated with each other, and the nut 3 is screwed into the shaft portion 22 to screw the overlapping portions 12 of the connecting member 1. The overlapping portions 12 of each other are at an arbitrary angle, that is, the direction from the insertion hole 14 formed at the center of the overlapping portion 12 toward the fixing portion 11 of each connecting member 1 is within a predetermined range. It can be fixed at an angle. The insertion hole 14 formed in the connecting member 1 has a shortest distance between the inner edges that is substantially the same as the diameter of the shaft portion 22 or slightly larger than the diameter of the shaft portion 22 so that the shaft portion 22 of the bolt 2 is inserted. The insertion hole 14 of the connecting member 1 on the side to which the nut 3 is fastened is formed in a substantially circular shape similar to the cross section of the shaft portion 22 and the head 21 of the bolt 2 is fastened. The insertion hole 14 of the connecting member 1 on the side is a non-circular hole 14a having a non-circular shape (in this embodiment, a square shape, but not particularly limited to a polygon or the like), and at the base of the shaft portion 22 of the bolt 2 A non-circular portion 23 is formed which has substantially the same shape as the non-circular hole 14a and is fitted into the non-circular hole 14a. Thereby, when the bolt 2 is inserted into the insertion hole 14 (non-circular hole 14 a) of the connecting member 1 and fastened with the nut 3, the rotation of the bolt 2 with respect to the connecting member 1 can be prevented. At this time, the thickness t ₁ of the non-circular portion 23 (that is, the length in the longitudinal direction of the shaft portion 22) is set as shown in FIG. 5 so that the back surface of the head portion 21 of the bolt 2 contacts the outer surface of the connecting member 1. The connecting member 1 is formed to be thinner than the thickness t _{2 of} the portion where the non-circular hole 14 a is provided, and the protruding end surface of the non-circular portion 23 comes into contact with the outer surface of the other connecting member 1 so that the head 21 of the bolt 2 is moved. Avoiding floating.

  If the non-circular portion 23 of the bolt 2 does not fit in the non-circular hole 14a of the connecting member 1 and protrudes toward the other connecting member 1, the non-circular portion 23 must be accommodated in the insertion hole 14 of the other connecting member 1. Since the head 21 of the bolt 2 is in a floating state, the insertion hole 14 of the other connecting member 1 needs to be enlarged to accommodate the non-circular portion 23. This is not preferable because the fastening area with 1 is reduced and the electrical conductivity is reduced. In this respect, the present application is preferable because the non-circular portion 23 is accommodated in the non-circular hole 14a as described above.

  Moreover, as shown in FIG. 4, the nut 3 in the present embodiment has a flange portion 31 formed on the contact surface to the outer surface of the connecting member 1. The bolt 2 and the nut 3 do not require conduction between the exposed surface of the head 21 of the bolt 2, the flange portion 31 of the nut 3, the fastening portion, and the like so as to be easily distinguished from other normal bolts and nuts. The outer surface may be colored.

  Further, as shown in FIG. 3, the bolt 2 of the present application has a circular outer shape of the head portion 21 and a curved outer surface so as to eliminate a rounded portion. By doing so, the angular portion is prevented from being exposed to the inside of the cable rack 4 and damaging the cable. Furthermore, it is preferable that the head 21 of the bolt 2 is made thinner and the protrusion degree is lowered, so that the cable can be further prevented from being damaged or caught.

  Such bolts 2 and nuts 3 are provided with protrusions 20 and 30 that dig into the outer surface of the connecting member 1 on the contact surface to the connecting member 1. The bolt 2 is provided with four protrusions 20 at substantially equal intervals on the back surface of the head 21, and the nut 3 is approximately evenly spaced on the flange surface that is a contact surface to the connecting member 1. Four protrusions 30 are provided.

  When the overlapping portions 12 of both the connecting members 1 are fastened and fixed by the bolts 2 and the nuts 3, the projections 20 and 30 provided on the bolts 2 and the nuts 3 on the outer surfaces of the connecting members 1 by the tightening force of the bolts 2 and the nuts 3. As a result, the protrusions 20 and 30 break the insulating coating on the outer surface of the connecting member 1 so that the base metal of the connecting member 1 and the bolt 2 and the nut 3 are electrically connected, and both the connecting member 1 and the both cable racks 4 are electrically connected. be able to.

  According to the configuration as described above, in the connection member having an angle adjusting function, the protrusion 20 is provided on the back surface of the head portion 21 of the bolt 2 so as to be electrically connected to the connection member 1. Since it is made to bite into the surface, various members are deformed by enlarging the insertion hole 14 of the connecting member 1 with a large diameter portion formed in the shaft portion 22 of the bolt 2 as in the conventional example, and large when fastening. There is no need for power.

  Further, as the bolt 51 and the nut 52 for fixing the connecting member 1 and the main beam 41, the same thing as the bolt 2 and the nut 3 of the present application may be used to ensure conduction.

It is a disassembled perspective view of one Embodiment of this invention. It is a perspective view explaining the attachment to a cable rack in embodiment same as the above. The bolt of the fastener of embodiment same as the above is shown, (a) is the perspective view seen from the surface side which provided the protrusion, (b) is the perspective view seen from the side opposite to (a). The nut of the fastener of embodiment same as the above is shown, (a) is the perspective view seen from the surface side which provided the protrusion, (b) is the perspective view seen from the side opposite to (a). It is a perspective view explaining fastening to a connecting member of a bolt in an embodiment same as the above. It is a perspective view which shows the connection state of a cable rack. It is a perspective view explaining the conduction | electrical_connection in the conventional cable rack.

Explanation of symbols

1 connecting member 11 one end (fixed part)
12 Other end (overlapping part)
2 Bolt 20 Projection 21 Head 3 Nut 30 Projection 4 Cable rack

Claims (3)

  One end is fixed to the connecting end of the cable rack and the other end protrudes from the connecting end, and the protruding end of the connecting member fixed to each of the connected cable racks is overlapped. And a cable rack connecting member comprising a bolt and a nut that are pivotably connected to each other, and a protrusion that bites into an outer surface of the connecting member is provided at a portion of the bolt head and a nut that contacts the connecting member. A cable rack connecting member.   An insertion hole through which the shaft portion of the bolt is inserted is formed at the projecting end portion of the two coupling members that are overlapped with each other, and a non-circular portion having a non-circular cross section is formed at the base portion of the shaft portion of the bolt. 2. The cable rack connection member according to claim 1, wherein the insertion hole of the connecting member on the side with which the head abuts is a non-circular hole into which the non-circular portion of the bolt is inserted.   3. The cable rack connecting member according to claim 2, wherein the non-circular portion of the bolt is received in the non-circular hole of the connecting member.

Images