JP2720319B2 - Cable rack steady rest - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steady rest for fixing a cable rack.

[0002]

[Prior art and its technical problems] Factories, stations, sales offices,
Concrete buildings such as stores, apartment houses, warehouses, gymnasiums, theaters, airports, etc., tunnels, underground shopping centers, elevated railways,
For various buildings such as elevated roads and bridges,
It is indispensable to carry out electrical wiring work to lay other communication cables (including wires, the same applies hereinafter) or pipes (conduit pipes) through which these cables are inserted in the space below the floor, vertical wall and ceiling. In general, the cables and pipes are branched or extended from a main line to a branch line, and are laid as a bundle of multiple strips to various places in a building or a building. Therefore, when such multiple cables and pipes are set up in a united state and run horizontally in the ceiling space area, a ladder-shaped or punched metal-shaped girder material called a cable rack is used. Have been.

[0003] As a method of laying such a cable rack, generally, groove-shaped rails (raceways, saddles) are fixed at regular intervals as a support material in an area of a vertical structure such as a wall, and a building is installed in a ceiling area. Bolts are lowered at regular intervals from building or building girders or deck plates to suspend the grooved rails horizontally, and cross the cable racks to such grooved rails and fix them. ing. As a means for fixing such a cable rack to the groove-shaped rail, a swing fitting is used.

[0004] By the way, in this kind of electrical installation work, a cover work for covering the upper opening of the cable rack with a cover is sometimes performed in order to improve the appearance and prevent foreign substances such as dust and water from entering the cable rack. Many. This cover has flanges on both side edges, and when such a cover is fixed to a cable rack, conventionally, the cover is mounted on the girder members on both sides of the cable rack, and the cover is extended over the cover in the width direction of the cover. Attach a strip member (strip or rail), hook the end of the hook bolt to the lower part of the girder member, pass the upper end of the L-shaped hook bolt through holes provided at both ends of the strip member, and nut The method of screwing into was taken. However, this method is uneconomical because a large amount of bolts and nuts need to be used only for fixing the cover, and the workability is poor and the work efficiency is low.
Furthermore, the hook bolts are exposed on the side surfaces of the cable rack at regular intervals, and both ends of the strip protrude considerably outside of the rack, resulting in poor appearance and poor appearance.

[0005] In addition, it is required to provide grounding as a safety measure of the electric line, and therefore, generally, ends of the cable racks are connected to each other by connecting fittings.
However, the cable rack is provided with a protective film by a coating film such as melamine or epoxy resin or an alumite process for corrosion prevention and improvement of appearance, and such a protective film has electric insulation. For this reason, there is a problem that the electric resistance value is increased due to the presence of the protective film, and the grounding cannot be reliably performed only by connecting with the connection fitting. Conventionally, as a countermeasure, a hole is formed at the end of each cable rack and a bond wire is connected to the hole, but this method has a problem that it is troublesome and the cost is extremely high.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to fix a cable rack to a grooved rail and to cover the upper surface of the cable rack. An object of the present invention is to provide a cable rack steady rest that can easily and efficiently fix a rack cover. Another object of the present invention is to
In addition to the above, another object of the present invention is to provide a cable rack anti-sway fitting which can also exhibit a grounding function of a cable rack having a protective film on the surface.

[0007]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a seat which is seated on the upper surface of a grooved rail at the lower end of a rising portion corresponding to a girder member of a cable rack whose upper surface is to be covered with a cover. A swing provided with a clamp at the upper end of the rising portion, which is in contact with the upper flange portion of the cable rack; A cover fixing mechanism provided with a female screw hole and a screw screwed into the female screw hole is provided at the rising portion of the stopper, and a flange of the cover or a leg of a cover retainer mounted on the cover is provided with a shaft of the screw. It has a configuration having intersecting grooves or slots. As the screw, a push screw or a set screw having a sharp portion at the tip which is firmly attached to the surface of the cable rack girder member is preferable. In addition, if necessary, a projection may be provided on the clamp portion for firmly contacting the upper flange of the girder member of the cable rack. As a fastening tool, in order to simplify the work, the nut is screwed into a screw penetrating a through hole provided in the seat portion, and the nut portion of the portion displaced from the screwing position of the screw is pivotally supported by a horizontal axis. A pair of right and left tightening pieces that can be expanded and contracted by tilting the horizontal axis as a fulcrum, and to hold the tightening pieces in the maximum expanded state in a normal state, and to return to the expanded state when the tightening pieces are shrunk. It is preferable to provide an elastic body for restoring the body and an elastic body for biasing in the axial direction for keeping the fastener at a predetermined distance from the seat in a normal state.

[0008]

According to the steady rest of the present invention, the seat to be seated on the grooved rail is tightened and fixed to the grooved rail by the fastener raised in the grooved rail, and the traction force through the seat is clamped by the clamp. The cable rack is fixed by acting on the upper flange of the cable rack.In the present invention, the rising portion between the seat portion and the clamp portion has a female screw hole penetrating in the thickness direction of the rising portion. Screw is screwed into. Therefore, when covering the cable rack with the rack cover, the rack cover is mounted on the left and right steady rests, and the cover retainer is mounted on the rack cover. The cover retainer has legs extending on both sides in the width direction in parallel with the rising portions of the steady rests, and these legs are provided with grooves corresponding to the female screw holes. Therefore, prior to the operation of fixing the cable rack to the grooved rail as described above, screws are screwed into the female screw holes in advance, and a cover retainer is attached to the rack cover in this state. When the screw is turned and the screw is turned, the screw shaft advances into the female screw hole, and the screw head comes into strong contact with the outer surface of the leg around the groove or hole. The cover is firmly fixed. Therefore, the rack cover can be fixed to the cable rack very simply and quickly at the same time as the fixing of the cable rack to the grooved rail. When holes corresponding to the female screw holes are provided in the legs, the cover retainer is attached to the rack cover, and then screws are screwed into the female screw holes through the holes to rotate, so that the cover retainer is rotated. Closely attached to the rack cover, and the rack cover can be firmly fixed. When a groove or a hole is provided in the flange portion of the cover, the cover retainer can be omitted, and the cover can be fixed to the cable rack by itself as described above.

When a sharp part is provided at the tip of the screw, the sharp part comes into firm contact with the web part of the cable rack girder member by the screwing. For this reason, even if the cable rack is provided with a protective film made of a coating film or an oxide film,
The protective film is locally broken or peeled off by the above-mentioned strong contact, and the projection is mechanically and electrically connected to the substrate. The cable rack is electrically connected to the channel rail via the steady rest because the seat of the steady rest is in close contact with the channel rail and the fixing device is also in strong contact with the channel rail, and therefore, The cable racks are electrically connected to the groove rails in addition to the electrical connection by the mutual connection, so that the electrical resistance for grounding can be significantly reduced.

[0010]

Embodiments of the present invention will be described below with reference to the accompanying drawings. 1 and 2 show examples of electric circuits to which the present invention is applied, and FIGS. 3 to 6 show basic embodiments of a cable rack steady rest according to the present invention. In FIGS. 1 and 2, reference numeral 1 denotes a groove-shaped rail which is disposed at predetermined intervals in a ceiling area and has an opening facing upward.
Are suspended horizontally by suspension bolts 101, 101. The suspension bolts 101 are attached to a support member 102 such as a shaped steel or a deck plate, for example.
3 and 103 are fixed. 1 'is a groove-shaped rail arranged in the wall surface region so that the opening faces sideways,
It is fixed to a supporting member such as a girder or beam or a wall or the like (not shown) made of shaped steel or the like with bolts or the like.

Reference numeral 2 denotes a cable rack, which has a ladder shape in which the left and right girder members 2a, 2a are connected by a bar member 2b, and each of the left and right girder members 2a, 2a has an inwardly recessed intermediate portion. Flanges 22 and 23 extending inward are formed at the upper and lower portions of the web 21. The cable rack 2 has not only a straight shape but also a flat shape as shown in FIG.
There are various types such as a shape, a T shape, an X shape, a vertical bend type, a horizontal bend type, and the present invention is applied to any of them. The entire surface of the cable rack 2 is used for anti-corrosion,
As partially shown in FIG. 4, a protective film 201 is applied to the substrate 200. When the material of the protective film 201 is an iron-based metal, melamine, epoxy, nylon, vinyl chloride,
It is a film formed by painting or coating such as an aging EVA resin (aging of a copolymer of ethylene and vinyl acetate).
When the material is aluminum, it is an anodic oxide film or a coating film of acrylic resin or the like applied on this film. The cable rack 2 has a predetermined length dimension, and at least two places within this length dimension are orthogonally received on the grooved rail 1, and each cable rack 2 is mutually connected by a girder fitting 2c. They are connected.
In the rising region, the cable rack 2 is in contact with the grooved rail 1 'orthogonally. These constitute a first way A ₁ , a second way A ₂ , and a third way A _{3 in} FIG. B is a cable bundle supported by the first way A ₁ , the second way A ₂ , and the third way A ₃ .

Reference numerals 3 and 3 denote steady rests according to the present invention, which are left and right spar members 2 at intersections with the grooved rails 1 and 1 '.
a, 2a. 6 is a cover mounted on the cable rack 2, and 7 is a cover retainer. As shown in FIGS. 3 to 5, the steady rest 3 includes a seat portion 30 seated on the upper surface of the grooved rail 1, a rising portion 31 extending upward from the base of the seat portion 30, and a rising portion 31. It has a clamp portion 32 extending from the end in parallel with the upper flange 22 of the spar member 2a.
The fastening tool 4 for the groove-shaped rails 1 and 1 'is mounted via the. In the cable rack 2 used in the rising area, the clamp portion 32 may have a free end that ends in a horizontal state. However, in the cable rack 2 used in the ceiling region, the clamp portion 32 is located at the distal end. Is provided with a locking portion 320 which extends downward in a required length.
Ribs 35, 35 are provided on the plate surface from the seat 30 to the clamp 32 by press working, and the ribs 35, 35 are connected at the seat 30.

A feature of the present invention resides in that a cover fixing mechanism is provided using the rising portion 31. A typical example of the cover fixing mechanism is a combination of a screw hole 37 and a female thread 8 screwed into the screw hole 37 to be provided also in the thickness direction of the rising portion 31. The female screw hole 37 is provided in a boss 370 formed by burring in the illustration. The boss 370 may project from the inner surface, or may project from the outer surface. The position where the female screw hole 37 is provided is shown in FIG.
As shown in (a), a portion relatively close to the clamp portion 32, that is, a portion corresponding to the straight portion of the web portion 21 may be used. Also, as shown in FIGS. 3 and 4 (b) (c), the beam members 2a
May be a portion corresponding to a web portion that is recessed inward. Further, the number of female screw holes 37 may be singular or plural, and in the latter case, it is preferable to provide the female screw holes 37 at intervals in the width direction of the rising portion 31. Screw 8 is the head when screwed
80 (including a case where a washer is attached below the cover) 80 has a length dimension capable of firmly contacting the surface of the cover retainer 7. The shape of the head is arbitrary, such as a polygonal shape shown on the left side of FIG. 3 and a thumb screw type shown on the right side. May be connected. When the screw 8 is screwed in a predetermined manner, the web portion 21 of the spar member 2a as shown in FIG.
May be less than the length. However, preferably, as shown in FIGS. 4 (a) and 4 (b), a member having a length that makes strong contact with the surface of the web portion 21 of the spar member 2a at the time of predetermined screwing and having a sharp portion 81 at the tip end. use. The sharp portion 81 may be a rod tip type having a protruding center or a hollow tip type having a peripheral edge formed as an annular edge.

The cover 6 has a web 60 supported by the clamp portions 32, 32 of the right and left swing stoppers 3, 3 and flanges 61, 61 circumscribing the rising portions 31, 31. The cover 6 has an arbitrary length. In this embodiment, the cover 6 has a length substantially equal to that of the cable rack 2 and is approximately 1/4 from both ends.
Are supported by the steady rests 3,3. Of course, the length may be about あ る い は or の of the cable rack 2. The cover retainer 7 is made of a strip material such as a band plate, and has flanges 61, 6 of the cover 6 on both sides in the width direction.
The legs 71, 71 are bent at both sides in the width direction so as to cover the outer surface of the cover 1. The free ends of the legs 71, 71 reach a position beyond the female screw hole 37 in a state of being attached to the cover 6. It has such a length. And each leg 7
3, 71, slit-shaped grooves 710, 710 having a width that allows the screw shaft 82 of the screw 8 to be inserted are provided as shown in FIGS. Instead of this, as shown in FIG.
However, in this case, it is undeniable that there is an inconvenience that the operation of screwing the female thread 8 into the female screw hole 37 through the long hole 711 after attaching the cover retainer 7 is required.

The present invention is not necessarily limited to the mode in which the cover retainer 7 is used, and the cover 6 itself may be fixed. FIGS. 7 and 8 show this example, in which the flanges 61 of the cover 6 are configured to reach a position beyond the female screw hole 36, and the flange 6
Slots 611 or slots 611 are provided in the slots 1 and 61 as shown virtually in FIG. 8, and the screws 8 are screwed through these slots. It is preferable to provide a plurality of grooves 610 or long holes 611 at intervals in the longitudinal direction of the cover in order to increase the degree of freedom of the fixing position of the cover 6 to the steady rest.

In addition, if necessary, the projections 3 that can penetrate the clamp portion 32 through the protective film 201 of the flange portion 22 of the cable rack girder members 2 a, 2 a and can bite into the substrate 200.
a may be provided. FIG. 9 shows an example thereof, in which (a)
(B), a slit-shaped hole 360 long in the width direction is formed in the clamp portion 32 between the ribs 35, 35, and a bit is driven into a part of the hole 360 so that the V-shaped claw piece 3 is formed.
The nail piece 361 has a sharp edge and a tip end having a predetermined height protruding from the lower surface of the clamp portion 32. The claw piece 361 may have the base end provided on the rising portion 31 side, that is, in the direction of the root of the upper flange, but preferably, the base end is provided on the free end side of the clamp portion, that is, in the direction of the upper flange free end as shown in the figure. In (c), a push screw 363 is screwed into the screw hole 321 to form the clamp portion 32. The push screw 363 may be any type as long as it has a turning portion 363a at the rear and a bar-shaped or recessed-pointed sharp portion 363b at the tip. In this embodiment, the projection height can be set arbitrarily. (d) shows an enlarged head 364a at the rear end and a pin-shaped object 364 having a conical or concave-pointed sharp portion 364b at the front end fixed to a through hole 322 formed in the clamp portion 32. is there. The fixing method is optional,
A method of caulking the enlarged head 364a to the clamp portion 32 or spot welding is used. In any case, the projection 3a is not limited to a single one, and a plurality of the projections 3a may be provided at intervals.

The fastener 4 is screwed into the screw 5, rises by turning the screw, and comes into strong contact with the walls 1a, 1a constituting the entrance groove of the grooved rails 1, 1 'to exert a tightening force. There is no particular limitation, and any nut such as a nut having inclined portions on the left and right and a blade-shaped nut as illustrated in FIGS. 10 (a) and 10 (b) may be used. The nut may have a spring on its lower surface that contacts the grooved rail bottom surface. The blade-shaped nut shown in FIG. 10 (b) has a guide surface which is not provided at a corner at the longitudinal end, until the longitudinal end surface comes into contact with the inner walls 1b, 1b of the grooved rails 1, 1 'by turning the screw. It is of a type that rotates and then moves up along the screw axis by the subsequent rotation of the screw 5. Further, although not shown, a stopper surface is formed at a pair of diagonal positions which has a cross-sectional groove shape, has a tightening portion at both ends and rises upward from the tightening portion, and now has a set of diagonal positions for guiding to the diagonal position. The stopper may be of a type having a surface and rotating the bolt by 90 degrees so that the stopper surface comes into contact with the inlet groove walls 1a, 1a so that the rotation is restricted and the stopper surface is used as a guide to ascend.

However, in this embodiment, a special fastener 4 is used in order to make the temporary fixing and fixing work easier. FIGS. 11 to 14 show the details thereof, in which a screw 5 passing through a through hole 300 provided in the seat portion 30 is provided.
And a horizontal shaft 40, 40 attached to a nut portion at a position displaced equidistantly from the screwing position of the screw 5.
And a pair of right and left fastening pieces 4b, 4b which can be expanded and contracted by tilting about the horizontal axes 40, 40 as fulcrums.
An elastic body 4c for restoring the tightening pieces 4b, 4b in the maximum expanded state in a normal state, and returning to the expanded state from this state even when the tightening pieces 4b, 4b are squeezed; Elastic body 4 for biasing in the axial direction for maintaining the tool 4 in a position at a predetermined distance from the seat 30 in a normal state.
d. The length of the fastening pieces 4b, 4b is made larger than the width of the entrance groove of the channel-shaped rails 1, 1 'in the maximum expanded state.

The pair of right and left tightening pieces 4b, 4b have a groove-shaped cross-sectional shape by a web and flanges rising from both sides of the web. Thereby, a fastening portion 41 to be firmly contacted with the lower surface of the entrance groove wall of the channel rail 1 is formed. A pair of projections 42, 42 extending upward from the fastening portion 41 by extending a flange are formed on the base end side of the fastening portion 41.
The end faces of the guide rails 2 and 42 have guide surfaces 43 and 43 which are substantially L-shaped with the tightening portions and which can face the inlet groove walls 1a and 1a of the groove rails 1 and 1 '. The guide surfaces 43, 4
Above 3 may extend straight, but in this embodiment it is inclined backward at the required angle. Projections 42, 42
In order to facilitate the narrowing of the fastening pieces 4b, 4b from the top, downward slopes 44, 44 in the expanded state. Also, as shown in FIG. 11, the fastening pieces 4b, 4b are respectively provided on the webs at the lower end of the fastening portion 41 so that the grooved rails 1, 1 'are smoothly narrowed from the state where they are in contact with the top wall 1c. Is a slope 45 descending at an angle parallel to or relatively close to the down slope 44.

The nut 4a has an outer width dimension substantially matching the inner width of the tightening pieces 4b, 4b, and has a female screw hole 46 in the center portion into which the screw 5 is screwed. And nut 4
a has a flat rectangular head 461 and a leg 462 connected to the head 461 and having a reduced width in the left-right direction. Head 4
The lower surface of 61 has a slope substantially corresponding to the slope 45 of the web. A lateral hole is provided in the head 461 at a position outside the female screw hole 46, and the fastening piece 4
The nut 4a and the fastening piece 4 are aligned with the holes provided in the flanges b and 4b and passed through the horizontal shafts 40 and 40.
b and 4b are connected. Horizontal axis 40, 40
Are two in this embodiment, one end of which is swaged and the other end is extended more appropriately through the fastening pieces 4b, 4b, and a land 400 is provided at the tip. The nut 4a may be solid, but in this embodiment, the head 461 and a pair of legs 4 descending from both sides thereof in a flange shape.
62, 462 has a downward groove-shaped cross section,
The female screw hole 46 is provided in a boss formed in a wall forming the head. The leg portions 462 and 462 are provided with the fastening pieces 4b,
When the fastening pieces 4b, 4b are fully opened, the lower end of the web abuts on the side face of the lower end of the leg to restrict the angle. Then, even when a strong tightening force acts on the tightening portions 41, 41 at that time, the load is stably received.

As the elastic body 4c for restoration, a spring or rubber is used. The spring is a linear spring, and the fastening piece 4b,
4b may be connected, but in this embodiment, a leaf spring is used, which is inserted from the lower surface side of the leg of the nut 4a in a state bent in a mountain shape, and the free end side of the right and left clamping pieces 4b, 4b. The web, in particular the inner surfaces of the slopes 45, 45, are brought into contact, thereby expanding the clamping pieces 4b, 4b. In this embodiment, the nut 4a has a groove-shaped cross section,
2,462 is a pair of front and rear sides with respect to the paper surface, so that it is a convenient wall for retaining. The leaf spring has a screw 5 at the center.
Has a hole 47 that allows the screw shaft to pass therethrough.

The elastic body 4d for urging in the axial direction may be interposed between the head of the screw 5 and the seat 30, but in this case, when the screw is fixed, the screw is pressed in the axial direction so that the fastener is formed in the groove. The operation is cumbersome because an operation of loading the rail is required.
Therefore, in this embodiment, the elastic body 4d is interposed between the lower surface of the seat portion 30 and the head of the nut 4a, and the nut 4
a is pressed in the direction opposite to the seat portion, thereby defining the set length of the screw 5 and functioning as a stopper for the screw 5 during tightening. The elastic body 4d may be a bellows-like cylinder made of rubber or plastic, but in this embodiment, a coil spring is used. The coil spring is tapered or drum-shaped so that the wires do not interfere when compressed. The elastic member 4d may be an independent part, but in this embodiment, a flange is provided at the upper end of a boss for forming a female screw hole of the nut 4a, and the elastic member rear end is provided for facilitating assembly. Is to be hooked.

On the other hand, the seat portion 30 of the steady rest 3 is provided with a guide piece 301 to prevent the fastener 4 from inadvertently rotating around the screw 5. This guide piece 3
Reference numeral 01 has a width smaller than the width of the entrance groove of the channel rails 1 and 1 ′, and is substantially parallel to the side of the fastening piece 4. The guide piece 301 may be lowered from the front end of the seat portion 30, but in order to have strength to withstand a tightening load, the plate material constituting the seat portion 30 is bent backward and backward from the front end, thereby raising the seat portion 30 upward. A guide plate 301 is bent downward from the lower plate portion 30b to have a double structure of a plate portion 30a and a lower plate portion 30b. Preferably, a cut is formed at the front end of the lower plate portion 30b so as to leave the parallel portions 303, 303, and the cut region is bent to form a guide piece. Guide piece 301
May be a simple plate, but in this embodiment, the guide grooves 3
12 and 13, the leading ends of the horizontal shafts 40, 40 are fitted into the guide grooves 302, 302 as shown in FIGS. The cable rack 2 is a web 2
There is also a flat one in which 1 is not depressed, and the present invention also applies to this. In addition to the ladder-shaped cable rack 2, there is also a cable rack 2 in which a punching plate is bent into a wide groove shape, which is also an object of the present invention. In addition, in FIG. 3, the fastener 4 on the left side with respect to the paper surface shows a temporary fixing state, and the fastener 4 on the right side with respect to the paper surface shows a fixed state.

[0024]

Next, the operation of the embodiment of the present invention will be described. In the ceiling area, the cable rack 2 is stretched over the grooved rails 1, 1 suspended in advance, and in the rising area, the cable rack 2 is grooved in a grooved rail 1 'which is fixed to a girder or a wall in advance. , 1 ', and are connected in the longitudinal direction by connection fittings 2c, 2c as appropriate. Then, the cable rack 2 is connected to the grooved rails 1, 1, 1 ',
1 ′, the clamp portion 32 is placed on the upper flange portion 22 of the beam member 2 a of the cable rack 2, and the seat portion 30 is fixed.
Is mounted on the grooved rail 1, and the screw 5 inserted in the seat portion 30 is turned to rotate the fastener 4 in the grooved rail 1, 1 ′.
Is raised to make strong contact with the lower surfaces of the inlet groove walls 1a, 1a, the seat portion 30 is brought into close contact with the groove-shaped rail, and the upper flange portion 22 is tightened by the clamp portion 32.

Although the conventional anti-vibration fitting only has such a cable rack fixing function, the present invention further has a cover fixing function. That is, in the embodiment shown in FIGS.
2 and 82 are screwed into the female screw holes 37 and 37, respectively, so that they protrude sufficiently outside the rising portions 31 and 31. In this state, the cover 6 is put on the cable rack 2 which has been fixed, and At the position of the steady rests 3, 3, the cover retainer 7 is put from above. In this way, as the legs 71, 71 descend along the flanges 61, 61 of the cover 6, the grooves 710, 710 advance so as to intersect the screw shafts 82, 82. Therefore, if the screws 8, 8 are rotated while the cover retainer 7 is in contact with the web 60 of the cover 6,
The head 80,
80 strongly contacts the outer surfaces of the legs 71, 71, and the legs 71, 71
Press inward. Therefore, it is possible to easily and quickly perform the cover construction. 7 and 8, if the cover 6 is put on the cable rack 2, the grooves 610, 610 provided in the flanges 61, 61 intersect the screw shafts 82, 82. Similarly, when the screws 8, 8 are turned, the screw heads 80, 80 come into firm contact with the flange, and the cover 6 is fixed. In this embodiment, since the cover retainer 7 is not required, the number of members is further reduced, and the cover installation can be facilitated. In the case of the long holes 711 and 611 as shown by phantom lines in FIGS.
Is screwed into the long holes 711 and 611 and screwed into the female screw hole 37.

When a screw having a sharp portion 81 at the tip is used as the screw 8, 8, the sharp portion 81 comes into strong contact with the web portion 21 of the beam members 2a, 2a by screwing, and breaks the protective film 201 to obtain a substrate. Dig into 200. The steady rest 3 has the seat 30 as described above, and the grooved rail 1,
1 'and the fastener 4 is also in close contact with the channel rails 1, 1'. Therefore, according to the present invention, as described above, the screws 8, 8 peel off the protective film 201 and bite into the substrate 200, so that the cable rack 2 and the steady rest 3 are electrically connected to each other. Numeral 2 is also electrically connected to the grooved rails 1 and 1 ′ via the steady rest 3. Therefore, by connecting the grooved rails 1 and 1 'to the grounding wire by an arbitrary route according to the situation of the construction site, in addition to or separately from the grounding by the mutual electrical connection of the cable racks 2, Grounding can be performed from the grooved rails 1 and 1 ′ via the metal fitting 3, whereby the electric resistance value in the electric circuit can be significantly reduced, and it is possible to appropriately deal with electric leakage, lightning strike, and the like. In addition, even if the mechanical connection between the cable racks becomes defective for some reason, or if the cable rack has to be partially separated from other parts, the grounding can be ensured. The safety of is increased.

To ground the channel rail 1, for example,
A member such as a shape steel or a deck plate for supporting the suspension bolts 101 may be connected to the grounding means, or a number of cable racks 2, 2 are arranged in parallel with the long grooved rail 1 as shown in FIG. In such a case, the longitudinal ends of the grooved rails 1 and 1 may be connected to a ground line circuit.
If the grooved rail 1 'is directly fixed to a girder or beam made of shaped steel or the like, the girder or beam may be connected to a ground wire circuit, and the grooved rail 1' may be fixed to a concrete wall or the like. In this case, a conductive member such as a strip may be attached to the end of the groove-shaped rail 1 'and connected to the ground line circuit.

Furthermore, since the rails 1 and 1 'can be grounded via the swing metal fittings 3 as described above, electric devices such as welding members and parts to a cable rack or the like during electric line construction can be used. Even when it becomes necessary to use it, there is no need to route a long ground wire,
This can be easily dealt with by bringing the ground terminal of an electric device such as an electric welding machine into contact with the groove-shaped rails 1 and 1 'and the suspension rod 101.

Further, since the screws 8, 8 bite into the beam members 2a, 2a, the anti-sway fitting 3 is also prevented from slipping, and the cable rack 2 can be more firmly fixed. In particular, when the cable rack 2 is used in the rising area, relative displacement between the cable rack 2 and the steady rest 3 is prevented, which is convenient for using the cable rack 2 as a ladder.

Further, when the projection 3a projecting from the lower surface of the clamp portion 32 is provided as in the embodiment, the projection 3a presses against the upper flange portion 22 of the beam member 2a when the cable rack is fixed. The sharp tip breaks or peels off the protective film 201 and cuts into the substrate 200. Therefore, in this case, the slip prevention effect is further increased, and the electrical connection between the cable rack 2 and the steady rest 3 can be further ensured.

When the fastener 4 shown in FIG. 10 is used, the work of temporarily fixing and fixing the steady rest 3 becomes considerably troublesome, but FIGS.
When such a structure is used, temporary fixing can be performed with one touch, so that the racking work can be simplified and speeded up. That is, when the cable rack 2 is temporarily fixed to the grooved rail 1, the steady rest 3 is held vertically or inclined so that the clamp portion 32 is located above the upper flange portion 22 of the spar member 2a. In this state, the steady rest 3 may be pushed down. The same applies to the case where the cable rack 2 is fixed in the vertical direction. In this state, the steady rest 3 is held horizontally or inclined so that the clamp portion 32 is located above the upper flange portion 22. What is necessary is just to push down the stopper 3.

In this way, the fastening pieces 4b, 4b of the fastening tool 4 hung below the seat portion 30 become inclined bottoms 4 as bottoms.
5 and 45 are ceiling walls 1c on both sides of the entrance groove of the grooved rails 1 and 1 '.
The guide piece 301 enters the entrance groove by the subsequent lowering of the steady rest 3, and the slopes 45, 45 are pressed from the left and right by the entrance groove walls 1 a, 1 a. As a result, the left and right fastening pieces 4b, 4b become elastic members 4c for restoration.
14 (a), it inclines inward with the abscissas 40 and 40 as fulcrums and contracts. Further, the pressing of the steady rest 3 continues, and the seat 30 approaches the top wall 1c of the grooved rails 1, 1 ', and the slopes 45, 45 of the fastening pieces 4b, 4b.
Reaches the lower ends of the inlet groove walls 1a, 1a.
14A, the clamping pieces 4b, 4b are rotated outward by the force of the restoring elastic body 4c as shown in FIG. 14B, and the clamping portions 41, 41 are moved into the inlet groove walls 1a, 1a. It passes under 1a and becomes horizontal. At that moment, the guide surfaces 43, 43 adjacent to the fastening portions 41, 41 become vertical again,
Opposite or under the inlet groove walls 1a, 1a.

In the steady rest 3, the seat portion 30 comes into contact with the top wall 1 c of the grooved rail 1, 1 ′, and the clamp portion 32 is provided on the upper flange 22 of the cable rack 2 and provided on the clamp portion 32. The grounding projection 3 a contacts the upper flange 22. At this time, the fastener 3 is in the maximum expanded state with the lower end surface of the web abutting against the side surface of the leg of the nut 4a, and the fasteners 41, 41 are located on the lower surfaces of the inlet groove walls 1a, 1a as shown in FIG. It is in a close position. Therefore,
The clamp part 32 is the upper flange 22 of the cable rack 2
The temporary fixing state can be set by simply pressing the steady rest 3 so as to be covered by the stud. In this state, even if the steady rest 3 is lifted, the fastening portions 41, 41 are in contact with the lower surfaces of the inlet groove walls 1a, 1a so that they do not come off from the grooved rails 1, 1 ', and move the steady rest 3 in the width direction. Even so, the side surface of the guide piece 301 abuts on the inlet groove walls 1a, 1a, so that it does not laterally shift. However, the steady rest 3 is free to move in the direction along the longitudinal direction of the inlet groove, and the guide piece 301 exerts a good guiding action. Therefore, the position of the cable rack 2 can be adjusted by freely moving the cable rack 2 to an arbitrary position on the groove-shaped rails 1 and 1 '.

When the fixed position of the cable rack 2 is determined, the screw 5 is turned. In this case, as the screw shaft enters the nut 4a, the fastening pieces 4b, 4b rise against the force of the elastic body 4d for urging in the axial direction. At this time, the guide piece 301 prevents the posture change due to the encircling of the fastening pieces 4b, 4b. In particular, when the guide piece 301 has the guide grooves 302, 302, the horizontal shafts 40, 40 are fitted therein, so that the fastener 4 stably rises vertically, and the fasteners 41, 41 are accurately positioned on the inlet groove wall 1a. , 1a and strongly tighten. At this time, the elastic body 4d for urging in the axial direction is compressed and presses the screw 5 downward through the nut 4a, so that it functions as a loosening prevention, and the lower ends of the webs of the fastening pieces 4b, 4b are connected to the legs of the nut 4a. Because it is received on the side surface, it can withstand strong torque. Further, since the seat portion 30 has a double thickness due to the bent portion 30 ', the guide piece 3 can be formed even by strong tightening.
01 does not tilt. Accordingly, the steady rest 3 is easily and firmly fixed to the grooved rails 1 and 1 '.
The cable rack 2 can be strongly fixed on the grooved rail by the clamp portion 32.

[0035]

According to the first aspect of the present invention described above, the upper surface of the grooved rail is seated on the lower end of the rising portion 31 corresponding to the girder member 2a of the cable rack 2 whose upper surface is to be covered with the cover 6. It has a seat portion 30 and a rising portion 31
The upper end of the cable rack 2 has a clamp portion 32 which comes into contact with the upper flange portion 22 of the cable rack 2, and the seat portion 30 is equipped with a tightening tool 4 which is raised by the rotation of the screw 5 and is tightened and fixed to the grooved rail 1. The rising portion 31 of the steady rest fitting
Is provided with a cover fixing mechanism having a female screw hole 37 and a screw 8 screwed into the screw hole 37. The screw 61 is attached to the flange 61 of the cover 6 or the leg 71 of the cover retainer 7 mounted on the cover 6. Since it has the grooves 610, 710 or the long holes 611, 711 intersecting with the axis, the cable rack 2
Not only can be fixed to the grooved rail 1, but also the cover 6 covering the upper part of the rack can be easily and efficiently installed with almost one-touch operation. Moreover, since the cover 6 or the cover retainer 7 is fixed by using the rising portion 31 of the steady rest 3, only the screw 8 is required as a component.
No special hardware is required for fixing the cover. Therefore, an excellent effect that construction cost can be greatly reduced in combination with workability and work efficiency can be obtained. According to the second and third aspects, in addition to the above-described effects, the electrical connection between the cable rack and the groove-shaped rail can be further achieved, whereby the reduction of the electric resistance value in the electric circuit can be realized. An excellent effect is obtained such that the welding ground can be freely taken. According to claim 4, a nut 4a through which the fastener 4 passes through the screw 5 passing through the through hole 300 provided in the seat portion 30,
It is pivotally supported by horizontal shafts 40, 40 attached to the nut portion at a position separated from the threading position of the screw 5, and the horizontal shafts 40, 40
And a pair of left and right tightening pieces 4b, 4b which can be expanded and contracted by tilting with
b is held in a maximum expanded state, and a resilient body 4c for restoring the tightened pieces 4b, 4b to the expanded state when the tightened pieces 4b are retracted, and a predetermined distance from the seat 30 in a normal state. And an elastic body 4d for urging in the axial direction for keeping the cable rack at a position separated therefrom, the temporary fixing to the grooved rail 1 can be easily and quickly performed by one-touch operation, and the cable rack is securely and firmly fixed. An excellent effect is obtained that it is possible to achieve a proper fixing.

[Brief description of the drawings]

FIG. 1 is a plan view showing an example of an electric circuit using a steady rest according to the present invention.

FIG. 2 is a partial perspective view of FIG.

FIG. 3 is a partially cut-away enlarged longitudinal side view of FIG. 2;

FIG. 4 is a partially enlarged cross-sectional view showing an example of a connection between a screw and a cable rack in the present invention.

FIG. 5 is a partially cutaway front view of FIG. 3;

FIG. 6 is a partially cutaway front view showing another example of the cover retainer in a use state.

FIG. 7 is a partially cutaway vertical sectional side view showing another embodiment of fixing the cover in the present invention.

FIG. 8 is a front view of the same.

FIG. 9 is an explanatory diagram showing an additional embodiment of the present invention.

FIG. 10 is a longitudinal sectional front view illustrating a fastener applied in the present invention.

FIG. 11 is a longitudinal sectional front view showing another example of the fastener used in the present invention.

FIG. 12 is a plan view of the same.

FIG. 13 is a sectional view taken along line XX of FIG. 11;

FIG. 14 is a sectional view showing stepwise a temporary fixing process when the fastening tool of FIG. 11 is used.

[Explanation of symbols]

 1, 1 'groove-shaped rail 2 cable rack 2a, 2a girder member 3 steady rest 3a projection 4 clamp 4a nut 4b, 4b clamping piece 4c elastic body 4d elastic body 5 screw 6 cover 7 cover retainer 8 screw 21 web part 22 Upper flange part 30 Seat part 31 Rise part 32 Clamp part 37 Female screw hole 81 Sharp part 200 Base material 201 Protective film

 ──────────────────────────────────────────────────続 き Continuation of the front page (72) Yoshio Onishi, Inventor Yoshio Onishi 31-19, 2 Ageo-cho, Yao-shi, Osaka (72) Masakatsu Onishi 1881-45, Kanaoka-cho, Sakai-shi, Osaka (56) References -21421 (JP, U) Japanese Utility Model 2-88414 (JP, U) Japanese Utility Model 3-74119 (JP, U) Japanese Utility Model 6-52320 (JP, U) Japanese Utility Model 4-61415 (JP, U) ) Japanese Utility Model Hei 3 74120 (JP, U) Japanese Utility Model 63-21422 (JP, U)

Claims (4)

(57) [Claims] An upper end of a rising portion 31 corresponding to a girder member 2a of a cable rack 2 whose upper surface is to be covered with a cover 6 is provided at a lower end of the rising portion 31 to be seated on an upper surface of a grooved rail. The upper flange part 22 of the cable rack 2
The rising portion 3 of the steady rest provided with a clamp 4 which is provided on the seat 30 with a clamp 4 which is raised by the rotation of the screw 5 and is clamped and fixed to the grooved rail 1.
1 is provided with a cover fixing mechanism having a female screw hole 37 and a screw 8 screwed into the female screw hole 37, and the flange 61 of the cover 6 or the leg 71 of the cover retainer 7 mounted on the cover 6
Has grooves 610, 710 or slots 611, 711 intersecting with the axis of the screw 8. 2. The cable rack anti-sway member according to claim 1, wherein the screw 8 includes a screw portion having a sharp portion 81 at the tip thereof which is firmly attached to the surface of the cable rack girder member. 3. The cable rack steady rest according to claim 1, wherein the clamp portion includes a protrusion provided on the upper flange of the girder member of the cable rack. 4. A through hole 300 provided in the seat portion 30 by the fastener 4.
A nut 4a threaded through a screw 5 penetrating the nut 5;
A pair of right and left tightening pieces 4 which are pivotally supported at 0, 40 and can be expanded and contracted by tilting about the horizontal axes 40, 40.
b, 4b and an elastic body 4c for restoring the tightening pieces 4b, 4b in the maximum expanded state in a normal state and returning to the expanded state when the tightening pieces 4b, 4b are narrowed.
2. The cable rack anti-vibration bracket according to claim 1, comprising: an elastic body 4d for urging the fastener 4 at a predetermined distance from the seat portion 30 in the normal state.