JPH08163752A - Swinging-proof hardware for cable rack - Google Patents

Abstract

PURPOSE: To provide a swinging-proof hardware for a cable rack which has not only the function of fixing a cable rack but also the function of grounding the cable rack having a protective film on its surface. CONSTITUTION: In the hardware which fixes a cable rack to a trench-shaped rail, protruding mechanisms 3a which can bite into the surface of the cable rack 2 are provided on clamping parts 32 or rising parts 31 to ground the cable rack 2 through the trench-shaped rail.

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]

[Conventional technology and its technical problems] Factories, stations, sales offices,
Concrete buildings such as stores, apartments, warehouses, gymnasiums, theaters, airports, tunnels, underground malls, elevated railways,
For various structures such as elevated roads and bridges,
It is indispensable to construct electric circuits by laying other cables for communication (including wires) in the following, or piping (conduit) that inserts these cables in the space below the floor, vertical wall and ceiling. In general, the cables and pipes are branched or extended from trunk lines to branch lines, and are laid as a bundle of multiple lines to various parts of a building or building. Therefore, a ladder-shaped or punching metal-shaped girder material called a cable rack is used as a support means when such multi-strand cables and pipes are started up in a bundle and run horizontally in the ceiling space area. Has been done.

As a method of laying such a cable rack, generally, in a vertical structure area such as a wall surface, groove-shaped rails (raceways, saddles) are fixed as a supporting material at regular intervals, and in a ceiling area, a building is constructed. The method is to hang hanging bolts at fixed intervals from the girders, deck plates, etc. of buildings and suspend the grooved rails horizontally, and then fix the cable racks by crossing them over the grooved rails. ing. A swing stop fitting is used as a means for fixing such a cable rack to the grooved rail.
Such a steady rest generally has a seat portion on a grooved rail at the bottom, a rising portion along the side of the cable rack from the end of the seat portion, and an upper flange of the cable rack at the upper end of the rising portion. The retaining part (clamping part) for the is formed in a bent shape, and by inserting a bolt into the seat part and rotating it, the tightening tool with a female screw located inside the grooved rail is attached to the inlet groove wall of the grooved rail. It was designed to be in strong contact with each other, and the seat portion was then tightened and fixed to the grooved rail.

By the way, in this kind of electric installation work, it is obliged to provide grounding as a safety measure for the electric line, and for this reason, the end portions of the cable rack are generally connected by connecting metal fittings. However, the cable rack is coated with a coating such as melamine or epoxy resin or anodized to improve corrosion resistance and appearance, and such a protective film has electrical insulation. For this reason, in the case of connecting with a connecting fitting, there is a problem that the electric resistance value becomes large due to the existence of the coating film, and it is not possible to surely ground. As a countermeasure against this, conventionally, a method has been adopted in which a hole is formed at the end of each cable rack and a bond wire is connected to it, but this method has a problem that it is troublesome and the cost becomes very high.

The present invention was devised to solve the above problems, and its purpose is to provide a cable rack having not only a fixing function for the cable rack but also a protective film on its surface. It is to provide a cable rack steadying metal fitting that can also exhibit a grounding function.

[0006]

In order to achieve the above object, the present invention has a seat portion for a grooved rail at a base end of a rising portion, and a clamp portion for a cable rack at an upper end of the rising portion. Is clamped and fixed to the grooved rail by a clamp, and a grounding projection mechanism that can be digged into the surface of the cable rack is provided at the clamp portion or the rising portion.

The earthing protrusion mechanism may be a single piece or a plurality of pieces, and may be a dot shape or a certain length. The protrusion mechanism for grounding may have a fixed or variable protrusion length. Further, the earthing protrusion mechanism may be formed integrally with the clamp portion or the rising portion, or may be formed as a separate member and attached to the clamp portion or the rising portion.

[0008]

The steady rest of the present invention is integrated with the cable rack by the clamp portion and fixed to the grooved rail by the tightening tool. The clamp portion or the rising portion is provided with the earth projection mechanism. The projecting mechanism makes strong contact with the surface of the flange portion or the web portion of the cable rack during or after fastening with a fastener. Therefore, even if the cable rack is provided with a protective film consisting of a coating film or an oxide film, the protective film is locally broken or peeled off due to the above-mentioned strong contact, and the protrusion is mechanically and electrically connected to the substrate. It The cable rack is electrically connected to the grooved rail via the brace because the seat of the brace is in close contact with the grooved rail and the fastener is also in strong contact with the grooved rail, thus In addition to the electrical connection of the cable racks to each other, the cable rack is also electrically connected to the grooved rails, whereby the electrical resistance value for grounding can be significantly reduced.
Moreover, the grounding mechanism is not exposed to the outside, so the appearance is good. Also, since the groove-shaped rail will have a grounding electrode,
The electric circuit can be freely configured even when members are welded to a cable rack or the like. Further, since the earthing protrusion mechanism is in strong contact with the cable rack, a slip-preventing or slip-preventing effect can be obtained, and the integration with the steady rest can be improved.

[0009]

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIGS. 1 and 2 show an example of an electric circuit to which the present invention is applied, and FIGS. 3 to 6 show a first embodiment 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 arranged at predetermined intervals in a ceiling region and has an opening portion directed upward, and is horizontally hung by hanging bolts 101, 101 via a hanging metal fitting 100. ing. The suspension bolts 101, 101 are mounted on the ceiling component 102 such as a shaped steel or deck plate by using the support metal fittings 10.
It is fixed via 3, 103. Reference numeral 1'denotes a groove-shaped rail which is arranged in the wall surface area so that the opening faces horizontally.
It is fixed to the shaped steel or wall with bolts.

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 crosspiece member 2b, and the left and right girder members 2a, 2a face inward at the upper and lower portions, respectively. Flanges 22 and 23 are formed to extend. The cable rack 2 is not limited to a linear shape, but has various plane shapes such as an L shape, a T shape, an X shape, a vertical bend shape, and a horizontal bend shape, and the present invention is applicable to any of them. A protective film 201 is applied to the base material 200 on the entire surface of the cable rack 2 in order to prevent corrosion and improve appearance. When the material is an iron-based metal, the protective film 201 is a film formed by coating or coating with melamine, epoxy, nylon, vinyl chloride, aging EVA resin (aging product of a copolymer of ethylene and vinyl acetate), or the like. Further, when the material is an aluminum-based material, it is a coating film made of an anodized film or an acrylic resin applied on the film.
The cable rack 2 has a predetermined length dimension, and at least one position within this length dimension is received orthogonally to the groove-shaped rail 1, and each cable rack 2 has a girder connection fitting 2
Connected to each other by c. In the rising region, the cable rack 2 is in contact with the groove-shaped rail 1 ′ at right angles. As a result, in FIG. 1, the first way A ₁ , the second way A 2
A way A ₂ and a third way A ₃ are configured. 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 girder members 2 at intersections with the grooved rails 1 and 1 '.
It is used by attaching to a and 2a. As shown in FIGS. 3 to 5, the steady rest 3 includes a seat portion 30 seated on the upper surface of the groove-shaped rail 1, a rising portion 31 extending upward from the root of the seat portion 30, and a rising portion 31. It has a clamp portion 32 extending from its end portion in parallel with the upper flange 22 of the girder member 2a, and the seat portion 30 is provided with a fastening tool 4 for the grooved rails 1, 1'via a screw 5. There is. Note that in FIG. 3, the tightening tool 4 on the left side of the paper surface is shown in a temporarily fixed state, and the tightening tool 4 on the right side of the paper surface is shown in a fixed state. In the case of the cable rack 2 in the rising area, the clamp portion 32 may end with the free end left horizontal, but the cable rack 2 in the ceiling area
In the first embodiment, the clamp portion 32 is provided with a locking portion 320 that extends like a canopy downward on the tip side for a required length. Parallel ribs 35, 35 are provided on the plate surface from the seat portion 30 to the clamp portion 32 by press working,
The ribs 35, 35 are connected at the seat portion 30.

A feature of the present invention is that at least one of the clamp portion 32 and the rising portion 31 (preferably the clamp portion).
The grounding protrusion mechanism 3a that penetrates the surfaces of the girder members 2a, 2a of the cable rack 2, that is, the protective film 201 and can dig into the base material 200 is provided. In the first embodiment, the earth projection mechanism 3a is formed integrally with the clamp portion 32. That is, in detail, a horizontally long hole 360 is formed in the clamp portion 32 between the ribs 35.
Is formed, and the clamp portion 32 is punched out with a bit or the like so as to cover the long side of the hole 360, and a claw piece 361 having a V-shaped front face or a similar shape is formed as shown in FIG. The tip projects from the lower surface of the clamp portion 32 by a predetermined height, and a sharp edge is formed at the lower edge. Although the base end of the claw piece 361 may be provided on the rising portion 31 side, that is, on the root side of the upper flange, the base end is preferably provided on the clamp portion free end side, that is, on the upper flange free end direction as shown in the drawing. As the claw piece 361, a notch such as a plane U-shape or a plane V-shape may be formed, and a portion inside the notch line may be pushed downward (cutting piece), but in terms of strength, the above-mentioned embodiment is used. Is suitable.

7 and 8 show a second embodiment of the present invention, in which the clamp portion 32 between the ribs 35, 35 is used as the earth projection mechanism 3a integrally formed with the clamp portion 32. As shown in FIG.
Is locally punched out with a bid or the like, and the clamp portion 32
The projections 362 are formed so as to project from the lower surface of the above to the required height. The protrusion 362 may be single as shown by the solid line in FIG. 8 or plural as shown by the phantom line. Further, it may be a so-called bead or ridge having an appropriate length instead of a dot shape. In some cases, the protrusion 362 may be a burring hole, and in this case, the jagged lower end surface of the burring cuts into the base material 200.

FIGS. 9 and 10 show a third embodiment of the present invention, in which the push screw 363 is screwed into the screw hole 321 to form the clamp portion 32, thereby forming the earth projection mechanism 3a. The push screw 363 has a rotation portion 363 on the rear portion.
Any material may be used as long as it has a and has a sharp portion 363b at the tip. In FIG. 9, the rotating portion 363
A plus or minus hole is a sharp portion 363.
As b, the tip of the depression is provided in which the central portion is depressed and the periphery is a ring-shaped edge. In FIG. 10A, a positive or negative hole is provided as the rotating portion 363a, and a conical rod tip is provided as the sharpened portion 363b. FIG.
At 0 (b), the push screw 363 has a head portion 363c, and positive and negative rotating portions 363a are provided therein. In this mode, the maximum protrusion height is set by the head 363c contacting the burring end forming the female screw hole 321. 9 and 10 (a), the maximum protrusion height can be set arbitrarily.

FIG. 11 shows a fourth embodiment of the present invention, which has an enlarged head 364a at the rear end and a conical shape at the front end or FIG.
Through-hole 32 in which a screwless pin-shaped object 364 having a sharp pointed portion 364b like a recess is formed in the clamp portion 32.
The grounding protrusion mechanism 3a is configured by being fixed to 2. The fixing method is arbitrary, and press fitting or expansion head 364
Examples of the method include crimping a onto the clamp portion 32 or spot welding. The number of the protrusions 3a in the first, third, and fourth embodiments is not limited to one, and a plurality of protrusions 3a may be provided at intervals.

FIG. 12 shows a fifth embodiment of the present invention, in which the rising portion 31 is provided with a grounding projection mechanism 3a. As the grounding projection mechanism 3a, the same mode as in the first to fourth embodiments can be adopted. That is, in FIG. 12A, a burring portion is provided on the outer surface or the inner surface of the rising portion 31 to form a female screw hole 311, and a push screw 363 is screwed into the female screw hole 311. The push screw may be any of those exemplarily shown in FIGS. 9 and 10 (a) and 10 (b). Earth protrusion mechanism 3
In this example, the position of a is provided in a region recessed inward of the girder member 2a, but a straight portion protruding outward, that is, a position close to the upper flange 22 and a lower flange 23.
It may be provided at a position close to. In these cases, the burring portion is provided on the outer surface. FIG. 12 (b) shows the ejection protrusion 362.
12C is shown in FIG. 12C.
Similarly to the above, the claw pieces 361 are projected through the holes 360, and it is preferable that these are provided not on the recessed region of the girder member 2a but on the straight portion protruding outward, and in the illustrated one, the upper flange. Although it is close to 22,
Of course, it may be provided at a position close to the lower flange 23.
In any case, the grounding protrusion mechanism 3a of the rising portion 31 may be a single or a plurality. Of course, as shown virtually in FIGS. 12 (a) and 12 (b), both the clamp portion 32 and the rising portion 31 may be provided with the grounding projection mechanisms 3a, 3a, which is also included in the present invention.

The tightening tool 4 engages with the screw 5 and rises when the screw rotates, and the tightening tool 4 is brought into close contact with the walls 1a and 1a forming the inlet grooves of the groove-shaped rails 1 and 1'to exert a tightening force. There is no particular limitation, and a nut having inclined portions on the left and right or a blade-plate nut as illustrated in FIGS. 13A and 13B is optional. The nut may have a spring on the lower surface that contacts the bottom surface of the grooved rail. The vane plate nut of FIG. 13 (b) has a guide surface at the end corners in the longitudinal direction, and the rotation of the screw causes the inner walls 1b, 1b of the groove-shaped rails 1, 1'to come into contact with the longitudinal end surface. It is of a type that rotates and then rises along the screw shaft by the subsequent rotation of the screw 5. Further, although not shown in the drawing, there is a pair of diagonally-positioned stopper surfaces that have a grooved cross section and have tightening parts at both ends, and stand upright from the tightening parts. Alternatively, the stopper surface may be brought into contact with the inlet groove walls 1a, 1a by rotating the bolt 90 degrees and rotation thereof is restricted, and the stopper surface may be used as a guide to ascend.

However, in this embodiment, in order to make temporary fixing and fixing work easier, a special tightening tool 4 is used.
Is used. FIGS. 14 to 16 show the details thereof. The nut 4a screwed into the screw 5 penetrating the through hole 300 provided in the seat portion 30 and the nut portion at a position equidistant from the screw 5 screwing position. A pair of left and right tightening pieces 4b, 4b which are pivotally supported by the attached horizontal axes 40, 40 and can be expanded and contracted by tilting with the horizontal axes 40, 40 as fulcrums, and the maximum expansion of the tightening pieces 4b, 4b in a normal state. Keep in the state,
When the tightening pieces 4b, 4b are squeezed, the restoring elastic body 4c is provided for surely returning from this state to the expanded state, and the tightening tool 4 in the normal state is provided with a predetermined distance from the seat portion 30. And an elastic body 4d for urging in the axial direction for maintaining the separated positions. The length of the fastening pieces 4b, 4b is made larger than the inlet groove width of the grooved rails 1, 1'in the maximum expanded state.

The pair of left and right tightening pieces 4b, 4b have a groove-shaped cross section by a web and flanges rising from both sides of the web, and the web and the flange are formed at the upper outer end positions of the respective tightening pieces 4b, 4b. A tightening portion 41 to be in strong contact is formed on the lower surface of the inlet groove wall of the groove-shaped rail 1. A pair of protrusions 42, 42 extending upward from the tightening portion 41 are formed on the base end side of the tightening portion 41 by extending the flange.
The end faces of 2, 42 have guide surfaces 43, 43 which are substantially L-shaped with the tightening portion and which face the inlet groove walls 1a, 1a of the groove-shaped rails 1, 1 '. The guide surfaces 43, 43
The upper portion may extend straight, but in this embodiment, it is inclined rearward at a required angle. In order to facilitate the constriction of the fastening pieces 4b, 4b from the top of the protrusions 42, 42, there are downward slopes 44, 44 in the expanded state. Further, as shown in FIG. 14, the tightening pieces 4b and 4b are respectively provided on the webs below the tips of the tightening portions 41 so that smooth constriction is performed from the state where the groove-shaped rails 1 and 1'are in contact with the top wall 1d. Is a slope 45 which is parallel to the descending slope 44 or descends at an angle relatively close thereto.

The nut 4a has an outer width dimension that substantially matches the inner width of the tightening pieces 4b, 4b, and has a female screw hole 46 into which the screw 5 is to be screwed, in the central portion. And nut 4
A has a flat rectangular head portion 461 and leg portions 462 which are continuous with the head portion 461 and whose width in the left-right direction is reduced. Head 4
The lower surface of 61 has a slope substantially corresponding to the slope 45 of the web. The head 461 is provided with a lateral hole on the outer side of the female screw hole 46, and the tightening piece 4 is previously formed.
nuts 4a and tightening pieces 4 by matching the holes provided in the flanges of b and 4b and inserting the horizontal shafts 40 and 40 through them.
b and 4b are connected. Horizontal axis 40, 40
Is two in this embodiment, one end of each of which is crimped and the other end of which extends through the fastening pieces 4b, 4b more appropriately, and a land 400 is provided at the tip. The nut 4a may be solid, but in this embodiment, the head 461 and the pair of leg portions 4 descending like a flange from both sides thereof.
62, 462 has a downward groove section,
The female screw hole 46 is provided in a boss formed in the wall forming the head. The legs 462 and 462 are tightening pieces 4b,
4b is extended to a level lower than the lower end of the fastening piece in the assembled state, so that when the fastening pieces 4b, 4b are expanded to the maximum, the lower end of the web comes into contact with the side surface of the lower end of the leg to regulate the angle. Then, even when a strong tightening force is applied to the tightening portions 41, 41 at that time, the load is stably received.

A spring or rubber is used for the elastic body 4c for restoration. The spring is a linear spring and the tightening piece 4b,
4b may be tied together, but in this embodiment a leaf spring is used, which is inserted from the lower surface side of the leg portion of the nut 4a in a state of being bent in a mountain shape, and the free end side of the left and right tightening pieces 4b, 4b. The webs, especially the inner surfaces of the slopes 45, 45, are brought into contact with each other, thereby expanding the fastening pieces 4b, 4b. In this embodiment, the nut 4a has a groove-shaped cross section and the leg portion 46 is
Since the pair of front and rear 2,462 is a front and a back with respect to the paper surface, it serves as a wall for preventing coming off conveniently. Leaf spring has 5 screws in the center
Has a hole 47 that allows passage of the screw shaft.

The elastic body 4d for urging in the axial direction may be interposed between the head of the screw 5 and the seat portion 30, but in this case, the screw is pressed in the axial direction at the time of fixing and the fastener is grooved. The operation is troublesome because it is necessary to insert it into the rail.
Therefore, in this embodiment, the elastic body 4d is interposed between the lower surface of the seat portion 30 and the head portion of the nut 4a, and the nut 4a is repulsed by the repulsive force.
By pressing a in the direction opposite to the seat portion, the set length of the screw 5 is regulated, and at the same time, it functions as a locking stopper for the screw 5. The elastic body 4d may be a bellows-shaped tube made of rubber or plastic, but a coil spring is used in this embodiment. The coil spring is tapered or drum-shaped so that the wires do not interfere with each other during compression. The elastic body 4d may be an independent part, but in order to facilitate the assembly, in this embodiment, a boss is provided on the upper end of the boss for forming the female screw hole of the nut 4a, and the elastic body rear end is attached to this. I am trying to hook.

On the other hand, the seat portion 30 of the steady rest 3 is provided with a guide piece 301 in order to prevent the tightening tool 4 from inadvertently rotating around the screw 5. This guide piece 3
01 has a width narrower than the inlet groove width of the groove-shaped rails 1, 1 ′, and is substantially parallel to the side surface of the tightening piece of the tightening tool 4. The guide piece 301 may be lowered from the front end of the seat portion 30, but in this embodiment, the plate material forming the seat portion 30 is inverted and bent backward from the front end in order to have strength to withstand a tightening load. The seat portion 30 has a double structure of an upper plate portion 30a and a lower plate portion 30b, and a guide piece 301 is bent downward from the lower plate portion 30b. Preferably the lower plate portion 30
A notch is formed so as to leave the parallel portions 303, 303 at the front end of b, and the notch region is bent to form a guide piece. The guide piece 301 may be a simple plate shape, but in order to provide a more appropriate guide for raising the fastening tool 4, guide grooves 302, 302 are formed in this embodiment, and the guide grooves 302 are formed as shown in FIGS. 15 and 16. , 302 with horizontal axis 4
The tips of 0 and 40 are fitted together. The cable rack 2 may be a ladder-shaped one or a punching plate bent into a wide groove shape, which is also an object of the present invention.

[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 groove rails 1, 1 that are suspended in advance, and in the rising area, the cable rack 2 is fixed in advance to the girders and walls. , 1 ', and appropriately connected in the longitudinal direction by connecting fittings 2c, 2c. Then, the cable rack 2 is attached to the grooved rails 1, 1, 1 ',
1 ', the clamp part 32 is put on the upper flange part 22 of the girder member 2a of the cable rack 2, and the seat part 3
0 is mounted on the groove-shaped rail 1 and the screw 5 inserted through the seat portion 30 is rotated to raise the tightening tool 4 in the groove-shaped rails 1 and 1'to move the inlet groove walls 1a and 1a. Make a tight contact with the bottom surface,
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 swing-stop fitting has only such a fixing function, in the present invention, the projection 3 mechanism a projecting from the lower surface of the clamp portion 32 at the time of the tightening has the girder member 2a. Is pressed against the upper flange portion 22 of. Therefore, the sharp tip breaks or peels off the protective film 201 and bites into the base material 200. In the first embodiment, the edge of the claw piece 361 is in strong contact with the upper flange portion 22, and the rising portion 31 of the steady rest metal fitting 3 exhibits a behavior of moving slightly backward with the tightening. The protective film 201 of the upper flange portion 22 is bitten and bites into the base material 200 by shifting from the state. In the second to fourth embodiments, as the clamp portion 32 comes into close contact with the upper flange portion 22 due to the pulling force associated with tightening, the projection 362, the push screw 363, and the pin-shaped object 3 are formed.
The tip of 64 is locally in strong contact with the upper flange 22,
It penetrates the protective film 201 and bites into the base material 200. In the third embodiment, since the protrusion degree and the biting force of the earth projection mechanism 3a can be adjusted at any time, the ground film 200 can be surely bitten even when the protective film 201 is hard. Even when the grounding protrusion mechanism 3a is provided on the rising portion 31, the girder member 2a is tightened by the clamp portion 32.
The tip is in strong contact with the main part (web) of the substrate, and the protective film 201 can be broken to penetrate into the base material 200. In the case of FIG. 12 (a), the push screw 363 can be retracted in advance, and after being clamped and fixed by the clamp portion 32, it can be protruded and bited into the base material 200.

The steady rest 3 is in close contact with the grooved rails 1, 1'with the seat portion 30 as described above, and the fastener 4 is also in close contact with the grooved rails 1, 1 '. Therefore, according to the present invention, as described above, the grounding protrusion mechanism 3a has the protective film 2
By removing 01 and biting it into the base material 200, the cable rack 2 and the steady rest 3 are electrically connected, and the cable rack 2 is also electrically connected to the groove-shaped rails 1, 1 ′ via the steady rest 3. Connect to. 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, a steady rest is provided. It is possible to ground from the groove-shaped rails 1 and 1'through the metal fitting 3, whereby the electric resistance value in the electric path can be significantly reduced, and it is possible to appropriately deal with electric leakage and lightning strike. In addition, even if the mechanical connection between the cable racks becomes defective for some reason, or even if the cable racks have to be partially separated from each other, the grounding can be surely taken, so that the electric circuit can be provided. Will be safer.

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

Further, as described above, since it is possible to ground the groove-shaped rails 1, 1'through the swing-stop fittings 3, electrical equipment such as welding of members and parts to a cable rack or the like during the construction of the electric line is possible. Even when it becomes necessary to use it, there is no need to run a long ground wire,
This can be easily dealt with by bringing the ground-side terminal of an electric device such as an electric welding machine into contact with the groove-shaped rails 1, 1 ′ or the suspension rod 101.

Further, the grounding projection mechanism 3a has the girder member 2a.
Since the anti-sway fitting 3 is prevented from slipping, the cable rack 2 can be more firmly fixed. Particularly when the cable rack 2 is used in the rising area, the cable rack 2 and the swing stop fitting 3 are prevented from being displaced relative to each other, which is convenient for using the cable rack 2 as a ladder.

When the fastening tool 4 as shown in FIG. 13 is used, the temporary fixing and fixing work of the steadying fitting 3 is considerably troublesome, but FIGS.
When such a structure is used, temporary fixing can be performed with one touch, so that the work can be simplified and speeded up. That is, when the cable rack 2 is temporarily fixed to the groove-shaped rail 1, the steady rest metal fitting 3 is so positioned that the clamp portion 32 is located above the upper flange portion 22 of the girder member 2a.
Is held vertically or inclined, and the steady rest metal fitting 3 may be pushed down in this state. The same applies to the case where the cable rack 2 is fixed in the vertical direction, in which the steadying metal fitting 3 is held horizontally or inclined so that the clamp portion 32 is located above the upper flange portion 22, and the swinging is performed in this state. It suffices to push down the stopper 3.

In this way, the tightening pieces 4b, 4b of the tightening tool 4 suspended under the seat portion 30 have the slope 4 as the bottom.
5 and 45 are top walls 1c on both sides of the entrance groove of the groove-shaped rails 1 and 1 '.
The guide piece 301 enters the inlet groove by the downward movement of the steady rest 3, and the slopes 45, 45 are pressed from the left and right by the inlet groove walls 1a, 1a. As a result, the left and right tightening pieces 4b and 4b are restored to the elastic body 4c.
As shown in FIG. 17 (a), the horizontal axis 40, 40 tilts inward and collapses against the force of. Further, the pressing of the steady rest 3 continues, the seat portion 30 approaches the top wall 1c of the groove-shaped rails 1, 1 ', and the slopes 45, 45 of the fastening pieces 4b, 4b.
Reaches the lower end of the inlet groove wall 1a, 1a, the inlet groove wall 1
Since the pinching pressure by a and 1a is released, the tightening pieces 4b and 4b are abducted by the force of the elastic body 4c for restoration as shown in FIG. 17 (b), and the tightening portions 41 and 41 become the inlet groove walls 1a, It passes through the bottom of 1a and becomes horizontal. At that moment, the guide surfaces 43, 43 rising adjacent to the fastening portions 41, 41 face the inlet groove walls 1a, 1a or reach a level lower than the inlet groove walls 1a, 1a.

The seat portion 30 of the steady rest 3 comes into contact with the ceiling wall 1c of the groove-shaped rails 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 mechanism 3 a that is in contact with the upper flange 22. At this time, the lower end surface of the web of the tightening tool 3 comes into contact with the side surface of the leg portion of the nut 4a to be in the maximum expanded state, and the tightening parts 41 and 41 are attached to the lower surfaces of the inlet groove walls 1a and 1a as shown in FIG. 17 (c). Close to each other. Therefore, the clamp portion 32 can be brought into the temporarily fixed state by merely pressing the steadying metal fitting 3 so as to cover the upper flange 22 of the cable rack 2. In this state, even if the steady rest 3 is lifted, the fastening portions 41, 41 come into contact with the lower surfaces of the inlet groove walls 1a, 1a, so that the groove-shaped rail 1,
Even if an attempt is made to move the steadying metal fitting 3 in the width direction without deviating from 1 ', the side surface of the guide piece 301 comes into contact with the inlet groove walls 1a, 1a, so that the lateral movement does not occur. 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 guide action. Therefore, the cable rack 2 can be freely moved to any position of the groove-shaped rails 1, 1'and adjusted in position.

After the fixing position of the cable rack 2 is determined, the screw 5 is rotated. In this way, the tightening pieces 4b, 4b rise as the screw shaft enters the nut 4a against the force of the elastic body 4d for axially urging. At the time of this rising, the guide piece 301 prevents the posture change due to the accompanying rotation of the tightening pieces 4b, 4b. In particular, when the guide piece 301 has the guide grooves 302, 302, since the horizontal shafts 40, 40 are fitted therein, the tightening tool 4 stably rises vertically, and the tightening portions 41, 41 are accurately positioned in the inlet groove wall 1a. , 1a approach the bottom surface and tighten firmly. At this time, the elastic body 4d for axially urging is compressed and presses the screw 5 downward through the nut 4a, so that it functions as a loosening stopper, and the lower ends of the webs of the fastening pieces 4b, 4b are the legs of the nut 4a. Since it is received on the side of the part, it can withstand a strong torque. In addition, since the seat portion 30 has a double thickness due to the bent portion 30 ', the guide piece 3 can be easily tightened.
01 does not tilt. Therefore, the steady rest 3 is easily and firmly fixed to the grooved rails 1, 1 ',
The cable rack 2 can be strongly fixed on the grooved rail by the clamp portion 32.

[0034]

According to the first aspect of the present invention described above, in addition to the function of fixing the cable rack, the cable rack and the grooved rail can be electrically connected by a simple structure. It is possible to realize the reduction of the electric resistance value in the electric path, and it is possible to obtain the excellent effect that the ground for welding can be freely set. According to the second to fourth aspects, since the earthing protrusion is integrally formed with the swing stop fitting, it can be manufactured at low cost. According to the fifth aspect, since the protrusion degree of the grounding protrusion can be adjusted and the biting can be increased, it is possible to achieve the condition of biting the base material according to the thickness and hardness of the protective film of the cable rack, and to ensure a reliable mechanical property. The excellent effect that electrical connection can be achieved is obtained. According to the sixth aspect, it is possible to obtain an excellent effect that the temporary fixing to the grooved rail can be easily and quickly performed by one-touch operation, and the cable rack can be surely and firmly fixed.

[Brief description of drawings]

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

FIG. 2 is a partial perspective view of FIG.

3 is a partially cutaway enlarged vertical side view of FIG.

FIG. 4 is a partial plan view of FIG.

5 is a partially cutaway front view of FIG.

FIG. 6 is a partial vertical sectional side view of the first embodiment of the present invention.

FIG. 7 is a partial vertical sectional side view showing a second embodiment of the present invention.

FIG. 8 is a partial plan view showing a second embodiment of the present invention.

FIG. 9 is a partial vertical sectional side view showing a third embodiment of the present invention.

FIG. 10 is a partial cross-sectional view showing another aspect of the third embodiment.

FIG. 11 is a partial vertical sectional side view showing a fourth embodiment of the present invention.

FIG. 12 is a partial vertical cross-sectional side view showing a fifth embodiment of the present invention.

FIG. 13 is a vertical cross-sectional front view illustrating a tightening tool applied in the present invention.

FIG. 14 is a vertical sectional front view showing another example of the fastening tool used in the present invention.

FIG. 15 is a plan view of the same.

16 is a cross-sectional view taken along the line XX of FIG.

FIG. 17 is a cross-sectional view showing, step by step, a temporary fastening process when the fastener of FIG. 13 is used.

[Explanation of symbols]

 1,1 'Groove-shaped rail 2 Cable rack 2a, 2a Girder member 3 Steady stop fitting 3a Earth protrusion mechanism 4 Tightening fitting 4a Nuts 4b, 4b Tightening piece 4c Elastic body 4d Elastic body 5 Screw 22 Upper flange portion 30 Seat portion 31 Rising part 32 Clamp part 200 Base material 201 Protective film 361 Claw piece 362 Ejecting protrusion 363 Push screw 364 Pin-shaped object

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Onishi, 31-31, 2 Ageo-cho, Yao-shi, Osaka (72) Inventor Masakatsu Onishi 1881-45, Kanaoka-machi, Sakai-shi, Osaka

Claims (7)

[Claims] 1. A seat portion 30 for a grooved rail is provided at a base end of a rising portion 31, a clamp portion 32 for a cable rack 2 is provided at a rising portion, and the seat portion 30 is fastened to the grooved rail by a fastening tool 4. In the fixed one, the cable rack steady rest fitting is characterized in that the clamp portion 32 and / or the rising portion 31 is provided with an earth protrusion mechanism 3a capable of being embedded in the surface of the cable rack 2. 2. The cable rack steady rest according to claim 1, wherein the grounding projection mechanism 3a is integrally formed with the clamp portion 32 and / or the rising portion 31. 3. The cable rack steady rest fitting according to claim 2, wherein the grounding projection mechanism 3a is a claw piece 361. 4. A grounding protrusion mechanism 3a is a projection 36
The cable rack steady rest according to claim 2, which is 2. 5. Screw holes 321 and 311 for mounting the earth protrusion mechanism 3a on the clamp portion 32 and / or the rising portion 31.
The cable rack steady rest according to claim 1, further comprising: and a push screw 363 screwed thereto. 6. The cable rack steady rest fitting according to claim 1, wherein the grounding projection mechanism 3a is a pin-shaped member 364 fixed so as to project from the surface of the clamp portion 32 and / or the rising portion 31. 7. A nut 4a in which a fixing member 4 is screwed into a screw 5 penetrating a through hole 300 provided in a seat portion 30, and a horizontal shaft 4 attached to a nut portion displaced from a screwing position of the screw 5.
A pair of left and right tightening pieces 4 which are pivotally supported by 0, 40 and can be expanded and contracted by tilting with the horizontal axes 40, 40 as fulcrums.
b, 4b and the elastic body 4c for restoration for holding the tightening pieces 4b, 4b in the maximum expanded state in the normal state and restoring the expanded state even when the tightening pieces 4b, 4b are squeezed.
The cable rack steady rest fitting according to claim 1, further comprising: an elastic body 4d for axially biasing the fastening tool 4 in a state in which the fastening tool 4 is normally spaced apart from the seat portion 30 by a predetermined distance.