JP4289255B2 - rack - Google Patents

Description

  The present invention relates to a rack used when wiring and piping such as cables and refrigerant pipes are performed in facilities such as buildings and factories.

  Conventionally, a rack constructed in a substantially ladder shape from a long main girder and a child girder installed at a predetermined interval on the main girder is suspended from a suspension bolt suspended from a concrete slab or the like. The rack girder can be installed by placing and fixing it on a substantially short bar-shaped hanger attached using metal fittings, or by hanging and supporting it directly by a main girder hanger connected to the suspension bolt. By placing a cable, a refrigerant pipe or the like on the cable, the cable or the like in the facility is arranged in an orderly manner. When wiring, etc., the size of each rack is naturally limited, so it is necessary to extend the rack according to the length of the cable, etc. A connection fitting is used in which the ends of the main beam are butted so as to cover the vicinity of each end from the outside.

  A bolt insertion hole is drilled in the connection fitting, and a bolt is passed through the insertion hole and a bolt insertion hole drilled in the vicinity of the end of the main girder, and a nut is screwed and tightened. Although the racks can be connected to each other, as described above, the racks are suspended from the suspension bolts suspended from the concrete slab, etc. It will be dangerous. Therefore, in order to ensure the safety of the operator, it is desired to make the work simpler by reducing the number of parts as much as possible when connecting the racks. Therefore, in order to solve such a problem, it is known that the rack has a function of a connection fitting (see, for example, Patent Document 1).

  As an example, the rack having the function of the connection fitting is as shown in a perspective view showing the ends of the main beams connected to each other in FIG. Each of the bent pieces 31, 32, 41, 42 has a substantially U-shape in cross-sectional view, and is provided with ridges 33, ridges 43 on the surfaces of the substrates 30, 40 inside the U-shape, against bending stress, etc. It has rigidity. Here, in order to provide the connection function, the rack is configured to be slightly larger in the vicinity of the one end 34 of the one parent beam 3b so as to hold the vicinity of the one end 44 of the other parent beam 4b. More specifically, in the vicinity of the one end 34, at least above the bent piece 31 and below the bent piece 32 via steps 315 and 325 corresponding to the thickness of the other bent pieces 41 and 42. The bent pieces 316 and 326 are connected to each other so as to be positioned at each other.

  Further, the substrate 30 of the parent beam 3b, the substrate 40 of the parent beam 4b connected to the parent beam 3b, and the upper end of the protrusion 33 and the lower surface of the recess 43 are substantially flush with each other. The board | substrate 305 and the protruding item | line 335 in the vicinity are outward (the insertion direction of the screw | thread 6 mentioned later) by the thickness of the board which forms at least the other board | substrate 40 and the protruding item | line 43 rather than the board | substrate 30 and the protruding item | line 33, respectively. Configured to be located. And the screw insertion holes 36 and 46 are drilled in the corresponding positions on the protrusions 335 and the recesses 43 of the main beams 3b and 4b, and one end 44 of the main beam 4b is connected to one end 34 of the main beam 3b. Inserting from the longitudinal direction A, holding the vicinity of one end 44 of the main beam 4b with the main beam 3b, inserting the screw 6 through the hole, and screwing the nut 7 together, It is assumed that the parent beams 3b and 4b can be connected to each other without using them.

  However, in this rack, only a strong connection is pursued, and the workability at the time of connection is not considered much. That is, even if the rack is long and has a considerable weight, if one of the main girders 3b and 4b is not made to be substantially horizontal, one end 44 of the main girder 4b is inserted from the longitudinal direction A into the main girder 3b. Can not do it. Therefore, a rack is known in which the connection strength between the racks is borne by the screw and the connectivity is improved instead (see, for example, Patent Document 2). As an example of the rack with improved connectivity, the upper folded piece 31 in the vicinity of one end 34 of the parent beam 3 is cut off as shown in the perspective view of the parent beam ends connected to each other in FIG. A main girder introduction part 310 is formed, and the main girder 4 can be not only inserted into the main girder 3 from the longitudinal direction A but also dropped from the short direction B (vertical direction) and attached to the main girder 3. It is like that.

On the other hand, since the upper folded piece 31 is cut off, for example, the folded pieces 31 and 32 cause the other end (the end opposite to the one end 44) of the parent beam 4 to be vertically higher than the height of the one end 44. It cannot regulate movement that moves. For this reason, the connection strength is weaker than that of the rack described above, but the connection strength between the racks is secured by increasing the screw insertion holes 36 and 46 instead.
JP 54-150695 A Japanese Utility Model Publication No. 53-93699

  By the way, in this technique, since it was possible to drop and connect one rack, the ridge 335 and the groove 43 described in the first technique are not formed (see FIG. 6). That is, if the main girder 3 has a ridge, the bent piece 42 at the lower end of the parent girder 4 comes into contact with the ridge, and the dropping operation is hindered. The uneven portion is not formed. However, in such a case, there is no part that restricts the vertical movement of the rack during temporary fixing before fixing with a screw, so that the rack is temporarily placed in an unstable state at a high place. . In particular, when the position of the other end of the main beam 4 (the end opposite to the one end 44) is increased, the one end 44 of the parent beam 4 is connected to the main beam 3 together with the weight of the parent beam 4. There is a problem that the bent pieces 31 and 32 may enter between the bent pieces 31 and 32 to cause biting or forcibly remove the bent pieces 31 and deform the bent pieces 31.

  On the other hand, in the technique described first (see FIG. 6), since the protrusion 335 and the recess 43 are formed, it can be temporarily placed in a stable state while having rigidity against bending stress and the like. As described above, one end 44 of the parent beam 4b cannot be inserted from the longitudinal direction A into the parent beam 3b unless both of the parent beams 3b and 4b are substantially horizontal. In particular, when the distance from the parent beam corresponding to the parent beam 3b, 4b is long, that is, in the case of a rack having a width, there is a problem that insertion is extremely difficult unless it is strictly leveled.

  The present invention has been made in view of the above-described various problems, and an object of the present invention is to provide a rack that can be connected even by dropping and can be stably fixed temporarily. is there.

In order to solve the above-mentioned problems, the inventors of the present application, as an invention according to claim 1, have an approximately U-shaped elastic member having a bent piece at the upper and lower end portions of a long plate-like substrate. A pair of parent girders that face each other in a symmetrical direction, and a plurality of child girders that are installed between the bent pieces at the lower ends of the parent girders, and folded at the lower end of one end of the parent girders In the rack in which the lower end of the other end in the longitudinal direction of the other rack is placed on one side and the other rack is connected between the other racks by holding the other end of the other rack between the main girders of the one end. The girder is provided with a ridge formed on the substrate surface in parallel with the longitudinal direction of the rack and a main girder introducing portion formed by cutting out a bent piece at the upper end in the vicinity of one end in the longitudinal direction, The other rack has a groove that fits into the protrusion. Said ridges and concave, when inserting the other rack from the parent digits introduction, with which is formed on the fittable height from the lateral direction of the parent digits, downward to the other rack By applying pressure, the space between the main girders is widened, and the projections and recesses are proposed to be fitted .
[The invention's effect]

  And in the invention which concerns on Claim 1, while the convex strip formed in parallel with the longitudinal direction of the said rack is provided in the board | substrate surface of the main girder, the concave strip which fits with the convex strip is provided also in the other rack. Therefore, these portions can restrict the vertical movement of the rack during temporary fixing, and the rack can be temporarily placed in a stable state even at a high place. Here, when the stability in such temporary fixing is selected, conventionally, connection by dropping has to be given up, and both have a trade-off relationship. However, the main girder in the present invention is an elastic member, and the ridges and concaves are formed at a height that can be fitted from the short direction of the main girder when another rack is inserted from the main girder introduction portion. Therefore, by applying a downward pressure to the other rack when dropped, the space between the parent girders can be expanded and the ridges and the ridges can be fitted.

  That is, in the invention according to claim 1, unless an excessive force exceeding the clamping force (elastic force) of the main beam is applied, the vertical movement of the rack can be regulated and temporarily placed in a stable state. At the same time, even if ridges and ridges are provided for the stability of temporary placement, it can be fitted together with the elastic force of the main beam when inserting another rack from the main beam introduction part. Since it is formed in a height, it has an effect that it can be connected even by dropping.

  Next, based on the above solution and the effects thereof, the best mode for carrying out the present invention will be described below. First, referring to FIG. 1 which is a perspective view showing the ends of the main girder connected to each other and FIG. 2 which is an enlarged view of the main part, the characteristic configuration of the present invention will be described. The main girder 3 (parent girder 3a, 3b) is formed by notching a protrusion 33 formed on the surface of the substrate 30 in parallel with the longitudinal direction of the rack 1 and a bent piece 31 at the upper end near one end in the longitudinal direction. And a parent girder introduction section 310 formed in the above manner. On the other hand, on the surface of the substrate 40 of the parent beam 4 (parent beam 4a, 4b) of the other rack 2, a concave line 43 that fits with the convex line 33 is provided. When the other rack 2 is inserted from the parent beam introducing portion 310 of the rack 1, the height is formed so that the parent beam 1 can be fitted from the short direction.

  When the racks 1 and 2 are connected, they can be connected by dropping or inserting from the longitudinal direction. In the former case, as shown in FIG. 3A, when the other end 44 of the rack 2 is inserted from the parent beam introducing portion 310 provided in the rack 1, the side end portion of the substrate 40 of the rack 2 is The upper end of the ridge 330 of the rack 1 is brought into contact with and locked. In this state, when the upper end portion of the other end 44 is pressed downward, that is, toward the rack 1, the side end portion of the substrate 40 slides along the inclined surface provided at the upper end portion of the ridge 330. The space between the parent beams 3 (parent beams 3a, 3b) of the rack 1 is gradually widened. Then, as shown in FIG. 3 (b), the ridge 33 and the ridge 43 are fitted, and the lower end of the other end 44 in the longitudinal direction of the rack 2 is on the bent piece 32 at the lower end of the rack 1. The other end 44 of the rack 2 is sandwiched between the main girders 3a and 3b at one end 34. At this time, if the other end 44 of the rack 2 is not in contact with the stopper 311, the rack 2 is inserted in the longitudinal direction until it comes into contact.

  On the other hand, in the latter case, the other end 44 of the rack 2 is connected to the stopper 311 with respect to the one end 34 of the rack 1 so that the protrusion 33 of the rack 1 and the recess 43 of the rack 2 are fitted. Similarly, the lower end portion of the other end 44 is placed on the bent piece 32 so that the rack 2 is sandwiched between the main girders 3 a and 3 b of the one end 34 of the rack 1 by inserting until the contact. . In any of the above cases, when the other end 44 of the rack 2 is connected so as to contact the stopper 311, the screw insertion hole 36 formed in the rack 1 and the screw insertion hole formed in the rack 2. Since 46 is concentric, the screw 6 is inserted into the screw insertion holes 36, 46, screwed into the nut 7 and tightened, whereby the connection between the racks 1 and 2 is firmly completed.

  Next, with reference to FIG. 4 which is a cross-sectional view of the main beam 3 including the above-described components, a more detailed configuration will be described as follows. As shown in FIGS. 1 to 4, the rack 1 according to the present invention has bent pieces 31 and 32 at the upper and lower ends of a substrate 30 having a long plate shape, and has a substantially U shape in cross section. On the surface of the substantially central portion of the substrate 30, a ridge 33 having a surface parallel to the surface of the substrate 30 is formed by bending toward the inside (the parent beam 3 facing each other). In the upper and lower ends, inclined portions connected to the substrate 30 are provided. Among these inclined portions, the inclination at the upper end particularly serves as a guide for dropping and connecting the rack 2 or removing it. Next, focusing on both ends of the main beam 3 in the longitudinal direction, the bent piece 31 at the upper end is cut out in the vicinity of the one end 34 of the main beam 3 by a length that can secure the connection strength of the racks 1 and 2. Thus, a parent girder introduction unit 310 is formed. Here, the length that can secure the above-described connection strength is, for example, that the movement of the rack 2 is restricted even if some stress is applied to the one end 45 of the rack 2 to move in the vertical direction. This means that the length is long enough to withstand bending stress.

  The notched end face of the bent piece 31 is in contact with the other end 44 of the rack 2 to form a stopper 311 that restricts the insertion of the rack 2. The stopper 311 may of course have the same length as the bent piece 31, but the bent piece 31 is connected to the bent piece 31 from the bent piece 31 via the inclined portion 312 so that it does not get caught during the rack connection operation. The width may be narrower than 31. Further, in the vicinity of the one end 34 of the main beam 3, a screw insertion hole 36 for inserting the screw 6 into the ridge 330 is formed close to two places, while in the vicinity of the other end 35 on the opposite side, A screw insertion hole 37 through which the screw is inserted into the ridge 33 is formed adjacent to two locations. Here, the ridge 330 has a surface parallel to the surface of the substrate 30 in the same manner as the ridge 33, is connected to the ridge 33 via the narrowed portion 331, and is wider than the ridge 33 in the width direction ( The length in the short direction is small and can be easily inserted into the recess 43 of the main beam 4.

  Next, paying attention to the lower end, child beams 5 are installed between the bent pieces 32 at the lower ends of the main beams 3a and 3b at predetermined intervals, and the main beam 3 and the child beams 5 are welded or caulked. It is fixed by etc. and has a substantially ladder shape. The child girder 5 is a short bar-like member, and the cross section in the longitudinal direction has a substantially U-shape with an opening upward. The upper end portion of the U-shape is bent vertically inward, and the bent pieces are formed only in the vicinity of both end portions of the child girder 5 so that an opening is formed in the central portion of the bar shape. Has been. A separator (not shown) or the like is attached to the sub beam (5), and the separator is used as a partition for wiring, a refrigerant pipe, and the like, and wiring paths and pipes are formed on the racks 1 and 2. .

  Next, the configuration of the rack 2 will be described. Similarly, the rack 2 has bent pieces 41 and 42 at the upper and lower end portions of the substrate 40 having a long plate shape, and has a substantially U shape in cross section. A recess 43 having a surface parallel to the surface of the substrate 40 is formed on the surface of the substantially central portion of the substrate 40 in an inward direction, and the upper and lower ends of the recess 43 are formed on the substrate 40. An inclining portion that is connected is provided. Next, focusing on both ends of the main beam 4 in the longitudinal direction, screw insertion holes 46 through which the screw 6 is inserted into the recess 43 are formed in the vicinity of the other end 44 of the main beam 4 in close proximity to two places. On the other hand, it is similarly drilled in the vicinity of one end 45 on the opposite side. Next, paying attention to the lower end, child beams 5 are installed between the bent pieces 42 at the lower ends of the parent beams 4a and 4b at predetermined intervals. The parent beam 4 and the child beams 5 are welded or caulked. It is fixed by etc. and has a substantially ladder shape. Since the configuration of the child digit 5 is the same as that of the parent digit 2, description thereof is omitted here.

  By the way, paying attention to the materials of the racks 1 and 2, the racks 1 and 2 are elastic members in which cables and refrigerant pipes are laid and have the strength to withstand the weights and can perform the above-described dropping operation. For example, a material such as a steel plate, aluminum, or stainless steel is used. In the case where a steel plate is used, epoxy powder coating, hot dip galvanization, or the like is performed in order to ensure corrosion resistance.

  By adopting the configuration described above, it is possible to provide a rack that can be connected even by dropping and that can be stably fixed temporarily. Of course, it is possible to change the embodiment without departing from the spirit of the invention. For example, the main beam introducing portion 310 may be formed not only at one end 34 of the rack 1 but also at the other end 35. Further, not only a linear rack but also a horizontal elbow, a horizontal cross, an angle rack, a bend rack and the like may be adopted. Furthermore, you may employ | adopt as an outer right angle horizontal elbow.

  More specifically, as shown in FIG. 5, the outer right-angled horizontal elbow 8 to which the present invention is applied includes a parent beam 9a composed of an L-shaped member in which members 9aa and 9ab are connected at a right angle, and a parent of an arc-shaped member. A girder 9b is provided, and in the same manner as the racks 1 and 2 described above, bent pieces 91 and 92 are provided at the upper and lower ends of the substrate 90 to form a substantially U-shape in cross section. On the surface of the substantially central portion of the substrate 90, a ridge 93 having a surface parallel to the surface of the substrate 90 is bent inward, and the upper and lower ends of the ridge 93 are formed on the substrate 90. An inclining portion that is connected is provided. In the vicinity of one end 94 of the main beam 9, the bent piece 91 at the upper end is cut out by a length that can secure the connection strength of the rack, thereby forming a main beam introducing portion 910. Further, the notched end surface of the bent piece 91 is in contact with the other end 44 of the rack 2 to form a stopper 911 that restricts the insertion of the rack 2.

  Similarly to the rack 1, the stopper 911 may have the same length as the bent piece 91 or may be configured to have a width narrower than that of the bent piece 91 via the inclined portion 912 from the bent piece 91. . Further, in the vicinity of the one end 94 of the main beam 9, screw insertion holes 96 through which the screws are inserted are formed in close proximity to two places, while also in the vicinity of the other end 95 on the opposite side. A screw insertion hole 97 through which the screw is inserted into the strip 93 is formed adjacent to two places. Here, the ridge 930 has a surface parallel to the surface of the substrate 90 in the same manner as the ridge 93, is connected to the ridge 93 through the narrowed portion 931, and is wider than the ridge 93 in the width direction ( The length in the short direction is small and can be easily inserted into the recess 43 of the main beam 4.

  Paying attention to the lower ends, the child beams 5 are installed at predetermined intervals between the bent pieces 92 at the lower ends of the parent beams 9a and 9b, and the parent beam 9 and the child beams 5 are fixed by welding, caulking or the like. It has a ladder shape. Here, since the outer right-angled horizontal elbow 8 includes the arc-shaped parent beam 9b, the distance between the parent beams 9 is not always constant. In order to compensate for this, for example, the child beam 5 may be fixed via the hanger 50. Since the configuration of the child beam 5 is the same as that of the parent beam 2, the description thereof is omitted here.

It is a figure which shows the rack which concerns on this invention, Comprising: It is the principal part enlarged view which expanded the connection part. It is a figure which shows the rack which concerns on this invention, Comprising: It is a perspective view which shows the main beam end part mutually connected. It is sectional drawing which shows the condition where a rack is mutually connected, Comprising: (a) is before drop connection, (b) is the figure which showed after drop connection. It is sectional drawing of the main beam shown in FIG. 2, Comprising: (a) is an AA arrow directional view of the said figure, (b) is an arrow directional view of the B direction of the said figure. It is a figure which shows an example at the time of applying to the outer vertical horizontal elbow about the connection structure of the rack which concerns on this invention. It is a figure which shows the rack of a 1st prior art example, Comprising: It is a perspective view which shows the main beam end part mutually connected. It is a figure which shows the rack of a 2nd prior art example, Comprising: It is a perspective view which shows the main beam end part mutually connected.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Rack 2 Racks 3 Master girder 31 Bending piece 310 Parent girder introduction part 32 Bending piece 33 Convex strip 34 One end 4 Parent girder 41 Folding piece 42 Bending piece 43 Concave strip 44 Other end 5 Child girder

Claims (1)

It consists of an elastic member that has bent plates at the upper and lower ends of the long plate-shaped substrate and is substantially U-shaped in cross-section, and a pair of parent beams facing each other in a symmetrical direction, and the parent beams A plurality of child beams installed between the bent pieces at the lower end portion, and the lower end portion at the other end in the longitudinal direction of the other rack is placed on the bent piece at the lower end portion at one end of the parent beam, and the one end In the rack that holds the other ends of the other racks between the main girders and connects the racks to each other, the main girders are formed on the surface of the substrate in parallel with the longitudinal direction of the racks, A main girder introduction portion formed by cutting out a bent piece at an upper end portion in the vicinity of one end portion in the direction, while the other rack includes a groove that fits into the protrusion, and the protrusion and the groove. When inserting another rack from the main beam introduction section, Together are formed in a fittable height from the direction by adding pressing downward to the other rack, and characterized in that spreads out between the parent digits, the ridges and concave stripes is fitted Rack to be.

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