JP2720318B2 - 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.
Such a steady rest generally has, at the bottom, a seat that sits on a grooved rail, a rising portion along the side of the cable rack from the end of the seat, and an upper flange of the cable rack at the upper end of the rising portion. The clamping part (clamp part) is bent and formed, and a bolt with a female screw located in the grooved rail by passing a bolt through the seat and turning it is attached to the entrance groove wall of the grooved rail. The seat was firmly attached and the seat was fastened and fixed to the grooved rail.

[0004] In this kind of electrical installation work, it is obligatory to provide grounding as a safety measure for electric lines, and therefore, generally, longitudinal ends of the cable racks are connected to each other by connecting fittings. However, the cable rack is provided with a coating such as melamine or epoxy resin or alumite processing for corrosion protection and improvement of appearance, and such a protective film has electric insulation. For this reason, when the connection is made with the connection fitting, there is a problem that the electric resistance value is increased due to the presence of the coating film, and the grounding cannot be reliably performed. As a countermeasure, conventionally, a method of making a hole at the end of each cable rack and connecting a bond wire to the hole has been adopted. However, this method has a problem that it is troublesome and extremely expensive.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a cable rack having a protective film on its surface as well as a cable rack fixing function. An object of the present invention is to provide a cable rack steady rest having a simple structure and a simple operation that can also exert a grounding function.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention has a seat at the lower end of a rising portion corresponding to a girder member of a cable rack, the seat being seated on the upper surface of a grooved rail. The upper end of the cable rack is formed with a bent portion in contact with the upper flange of the cable rack, and the seat portion is equipped with a tightening tool which is raised by the rotation of a screw and tightened and fixed to the groove-shaped rail. A grounding projection that can be cut into the upper surface of the cable rack is punched out.

The grounding projection may be a front V-shaped or similar claw piece stamped so as to cover the long side of the hole formed in the clamp portion, or may be formed by locally punching the clamp portion. It may be a projection that protrudes from the lower surface of the portion by a required height.

[0008] As a preferable tightening tool, a nut screwed into a screw penetrating a through hole provided in the seat portion, and a horizontal shaft mounted on a nut portion of a portion displaced from a screwing position of the screw, are pivotally supported. A pair of right and left tightening pieces that can be expanded and contracted by tilting with the horizontal axis as a fulcrum, and to hold the tightening pieces in the maximum expanded state under normal conditions, and to return to the expanded state even when the tightening pieces are shrunk. And an elastic body for urging in the axial direction for keeping the fastener at a predetermined distance from the seat in the normal state.

[0009]

According to the present invention, there is provided a steady rest which has a seat positioned on the upper surface of a grooved rail so that a clamp comes into contact with an upper flange of a cable rack, and a screw passing through the seat is rotated to tighten the fastener. Is raised to fix the cable rack to the grooved rail, and the clamp portion is integrally formed with a grounding projection by punching in the thickness direction thereof. For this reason, when the clamp is raised and clamped and fixed to the grooved rail, and the seat is strongly pulled downward, the clamp is strongly contacted with the upper flange of the cable rack. The grounding protrusion projecting below the thickness is in strong contact with the surface of the upper flange. For this reason, even if the protective film made of a coating film or an oxide film is applied to the cable rack, the protective film is locally broken or peeled off by the above-mentioned strong connection, and the projection is mechanically formed on the substrate.
Electrically connected. The cable rack is electrically connected to the channel rail via the steady rest, because the seat of the steady rest is closely attached to the grooved rail and the fastener is also firmly connected to the grooved rail. Are electrically connected to the grooved rail in addition to the electrical connection by the mutual connection, so that the electric resistance value for grounding can be significantly reduced. In addition, since the grounding mechanism is not exposed to the outside as with screws, it is well-formed, and the grounding is performed using the projections formed integrally with the clamp, so there is no need to use separate members such as screws. Thereby, the structure is simple and the cost can be reduced. In addition, since the operation of rotating the screw only for fixing the cable rack and forming another ground is not required, workability is improved and efficiency can be improved. Further, since the groove-shaped rail has a grounding electrode, an electric circuit can be freely configured even when members are welded to a cable rack or the like.

[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 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 directed upward, and is horizontally suspended by suspension bolts 101, 101 via suspension fittings 100. ing. The suspension bolts 101 are attached to a ceiling component 102 such as a shaped steel or a deck plate by a support fitting 10.
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 the shape steel or the 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 bar member 2b, and the left and right girder members 2a, 2a are respectively provided inside and below the side wall. An upper flange 22 and a lower flange 23 extending in the direction are formed. The cable rack 2 is not limited to a linear shape, and has various 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. The entire surface of the cable rack 2 has a protective film 2
01 is given. When the material is an iron-based metal, the protective film 201 is a film formed by painting or coating of melamine, epoxy, nylon, vinyl chloride, aged EVA resin (aged copolymer of ethylene and vinyl acetate), and the like. 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, and at least one position within the length is orthogonally received on the grooved rail 1 and the cable racks 2 are 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. Thus, in FIG. 1, the first way A ₁ , the second way A ₂ , and the third way A ₃
Is 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 spar members 2 at intersections with the grooved rails 1 and 1 '.
a, 2a. 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 beam member 2 a. A clamp portion 32 is formed to be bent from an end of the rising portion 31 so as to extend in parallel with the upper flange 22.
The fastening tool 4 for the groove-shaped rails 1 and 1 'is mounted via the. In FIG. 3, the fastener 4 on the left side of the drawing is shown in a temporarily fixed state, and the fastener 4 on the right side of the drawing is shown in a fixed state. In the case of the cable rack 2 used in the rising area, the clamp 32
May be finished with the free end horizontal, but in the case used for the cable rack 2 in the ceiling area, the clamp portion 32
Is a locking portion 32 which extends in the shape of an eave below the required length on the tip side.
0 is provided. The plate surface extending from the seat portion 30 to the clamp portion 32 is provided with parallel ribs 35 by press working.
Are provided, and the ribs 35, 35 are connected at the seat 30.

A feature of the present invention is that a grounding projection 3a which penetrates the surface of the upper flange 22 of the cable rack 2, ie, the protective film 201, and can be cut into the substrate 200 is integrally formed on the clamp portion 32 by local processing. It was done. 4 to 6 show the first embodiment,
In this embodiment, a horizontally long hole 360 is formed in the clamp portion 32 between the ribs 35, 35, 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 the front V is formed as shown in FIG. A claw 361 having a character shape or a similar shape is formed. The claw 361 has a tip projecting from the lower surface of the clamp portion 32 by a predetermined height, and a sharp edge is formed at a lower end edge. 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. As the claw piece 361, a notch such as a flat U-shape or a flat V-shape may be formed, and a portion in the cut line may be pushed down (cut-off piece). Are suitable.

FIGS. 7 and 8 show a second embodiment of the present invention.
As a, the clamp portion 32 between the ribs 35, 35 is locally punched with a bid or the like, and a projection 362 projecting from the lower surface of the clamp portion 32 by a required height is formed. The projection 362 may be single as shown by a solid line in FIG. 8 or may be plural as shown by a virtual line. Further, it may be a so-called bead or ridge having an appropriate length instead of a point shape. In some cases, the protrusion 362 may be a burring hole.
Bite into 00.

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 grooves of the grooved rails 1, 1 'to exert a tightening force. It is necessary. FIGS. 9 (a) and 9 (b) illustrate an example thereof, in which a nut having inclined portions on the left and right, a blade-shaped nut, or the like is used. The nut may have a spring on its lower surface that contacts the grooved rail bottom surface. In the blade-shaped nut shown in FIG. 9B, a guide surface is not provided at an end corner in the longitudinal direction, and the inner wall 1 of the grooved rails 1, 1 'is rotated by turning a screw.
b, 1b, until the longitudinal end faces thereof come into contact with each other, and then rise 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 groove-shaped cross-section and has a tightening portion at both ends and rises upward from the tightening portion. By rotating the bolt by 90 degrees, the stopper surface hits the inlet groove walls 1a, 1a, the rotation of which is restricted, and the stopper surface rises as a guide.

However, this preferable fastening tool 4 allows the temporary fixing and fixing work to be performed more easily.
FIGS. 10 to 13 show the details thereof,
The nut 4a is screwed into the screw 5 passing through the through hole 300 provided in the nut, and the horizontal shafts 40, 40 attached to the nut portions at positions equidistant from the screwing position of the screw 5 are pivotally supported.
A pair of right and left tightening pieces 4b, 4b which can be expanded and contracted by tilting about 0, 40 as a fulcrum, and hold the tightening pieces 4b, 4b in a maximum expanded state in a normal state.
an elastic body 4c for restoring so that even when b is pursed, it can be surely returned to the expanded state from this state;
An elastic body 4d for urging in the axial direction for keeping the fastener 4 at a predetermined distance from the seat 30 in a normal state is provided. 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 clamping pieces 4b, 4b have a groove-shaped cross-sectional shape formed 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 surfaces of the guide rails 2 and 42 have a substantially L shape with the tightening portion, and have guide surfaces 43 and 43 facing the inlet groove walls 1a and 1a of the grooved rails 1 and 1 '. The guide surfaces 43, 43
Above this may extend straight, but in this embodiment it is inclined backward at the required angle. In order to facilitate the narrowing of the fastening pieces 4b, 4b from the top of the projections 42, 42, there are downward slopes 44, 44 in the expanded state. As shown in FIG. 10, the fastening pieces 4 b, 4 b are respectively provided on the web below the front end of the fastening portion 41 so that the groove rails 1, 1 ′ are smoothly narrowed from the state of contact with the top wall 1 d. 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 fastening pieces 4b, 4b, and has a female screw hole 46 into which the screw 5 is screwed in the center. 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 is used.
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, the screw is pressed in the axial direction at the time of fixing 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, a guide piece 301 is provided on the seat portion 30 of the steady rest 3 so as to prevent the fastener 4 from being inadvertently rotated 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. Although the guide piece 301 may be lowered from the front end of the seat portion 30, in this embodiment, in order to have strength to withstand a tightening load, the plate material forming the seat portion 30 is reversely bent backward from the front end, thereby 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 cut is formed at the front end of b so as to leave the parallel portions 303, 303, and the cut region is bent to form a guide piece. The guide piece 301 may be a simple plate, but in this embodiment, guide grooves 302, 302 are formed in order to provide a more appropriate rise guide of the fastener 4, and as shown in FIGS. 15 and 16, the guide grooves 302 are formed. , 302 with horizontal axis 4
The 0, 40 tips are fitted together. The cable rack 2 may be formed by bending a punching plate into a wide groove in addition to a ladder-shaped cable, which is also an object of the present invention.

[0022]

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 2a of the cable rack 2 and the seat portion 3 is fixed.
0 is mounted on the grooved rail 1 and the screw 5 inserted in the seat 30 is turned to raise the fastener 4 in the grooved rails 1 and 1 ′, thereby forming the entrance groove walls 1 a and 1 a. Make a strong contact with the bottom,
The seat portion 30 is brought into close contact with the grooved rail, and the upper flange portion 22 is tightened by the clamp portion 32.

The conventional anti-vibration fitting only has such a fixing function. However, in the present invention, the fastening tool 4 comes into strong contact with the lower surfaces of the inlet groove walls 1a, 1a at the time of the fastening. The seat portion 30 is strongly pulled downward, and the rising portion 31 following the seat portion 30 and the clamp portion 32 at the upper end thereof are entirely lowered. Therefore, the grounding projection 3a protruding from the lower surface of the clamp portion 32 is pressed against the upper flange 22 of the spar member 2a. Therefore, the sharp tip breaks or peels off the protective film 201 and bites into the substrate 200. In the first embodiment, the nail piece 361
The edge of the upper flange 22 strongly contacts the upper flange 22, and the rising portion 31 of the steady rest 3 moves slightly rearward with the tightening, so that the claw piece 361 shifts from the above-mentioned state. Protective film 201 of flange 22
And bite into the substrate 200. In the second embodiment, as the clamp portion 32 comes into close contact with the upper flange 22 by the traction force accompanying the tightening, the tip of the embossed projection 362 locally comes into strong contact with the upper flange 22, and penetrates the protective film 201 to form the base 200. Bite into. Since the ground projection 3a is automatically cut by the tightening tool 4, no special operation is required.

As described above, the steady rest 3 is in close contact with the channel rails 1, 1 'with the seat 30, 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 grounding projection 3a is
The cable rack 2 and the steady rest 3 are electrically connected to each other by peeling off and biting into the base 200, and the cable rack 2 is electrically connected to the grooved rails 1, 1 ′ via the steady rest 3. Connecting. 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.

Further, as described above, since it is possible to ground the grooved rails 1 and 1 'via the swing stopper 3, electric components such as welding members and parts to a cable rack or the like during the construction of an electric circuit. 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.

When the fastening tool 4 shown in FIG. 9 is used, the work of temporarily fixing and fixing the anti-sway fitting 3 becomes considerably troublesome, but the structure shown in FIGS. In the case of using, the temporary fixing can be performed with one touch, so that the operation 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 3 is held vertically or inclined so that the clamp portion 32 is located above the upper flange 22 of the spar member 2 a. 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, and the anti-sway bracket 3 is set so that the clamp portion 32 is located above the upper flange portion 22.
May be held horizontally or inclined, and the steady rest 3 may be pushed down in this state.

In this way, the fastening pieces 4b, 4b of the fastening tool 4 hung below the seat portion 30 are provided on the slope 4 as a bottom.
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.
As shown in FIG. 13 (a), the horizontal axis 40, 40 serves as a fulcrum and tilts inward 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.
13A, the clamping pieces 4b, 4b are rotated outward by the force of the restoring elastic body 4c as shown in FIG. 13 (b), and the clamping portions 41, 41 are brought into contact with the inlet groove walls 1a, 1a. It passes under 1a and becomes horizontal. At that moment, the guide surfaces 43, 43 rising up 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 member 30 of the steady rest 3 comes into contact with the top wall 1c of the grooved rails 1 and 1 ', the clamp portion 32 covers the upper flange 22 of the cable rack 2, and is 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.

[0031]

According to the first to third aspects of the present invention described above, the clamp portion 32 which is in contact with the upper flange 22 of the cable rack 2 is bent at the upper end of the rising portion 31 corresponding to the girder member 2a of the cable rack. It has a seat 30 formed at the lower end and seated on the upper surface of the channel rail, and the seat 30 is equipped with a fastening tool 4 which is raised by the rotation of the screw 5 and is fastened and fixed to the channel rail 1. In addition, since the grounding projection 3a that can be cut into the surface of the upper flange of the cable rack 2 is stamped and formed on the clamp portion 32, the seat portion 30, the rising portion 31, and the clamp portion are tightened by the fastener 4. 32, the grounding projection 3a can be brought into firm contact with the upper flange 22 of the cable rack 2 and bite into the surface thereof. Click 2 and reduce the electric resistance value can be realized in the electrical connection the aim to paths with interposition rail 1, also, it is possible to take a welding ground freely.

In addition, the grounding projection 3a is
2 is formed by local processing, and no special member such as a grounding screw is used. Therefore, the structure is simple and can be implemented at low cost. No special operation is required,
The workability is very good, and excellent effects such as efficient work can be obtained.

According to the fourth aspect, the fastening tool 4 is provided with the seat 3
The nut 4a is screwed into the screw 5 passing through the through hole 300 provided in the nut 0, and the horizontal shafts 40, 40 attached to the nut portions of the portion displaced from the screwing position of the screw 5 are pivotally supported. , 40 as a fulcrum, a pair of right and left tightening pieces 4b, 4b, which can be expanded and contracted by tilting, and hold the tightening pieces 4b, 4b in a maximum expanded state in a normal state.
An elastic body 4c for restoring the expanded state even when the 4b is retracted, and an axial bias for maintaining the fastener 4 at a predetermined distance from the seat 30 in a normal state. Since the elastic member 4d is provided, the pair of right and left tightening pieces is pressed down from the state where the swing stopper 3 is positioned above and in the vicinity of the cable rack 2 until the seat portion 30 comes into contact with the upper surface of the grooved rail 1. 4b, 4b are inserted into the grooved rail 1 by being compressed and then automatically expanded in the grooved rail 1 by the elastic body 4c to temporarily fix the grooved rail and the cable rack of the projection 3a for grounding. The contact with the upper flange 22 can be easily and quickly performed by a one-touch operation.
Since the b and 4b rise to tighten the grooved rail 1, the cable rack can be reliably and firmly fixed and the grounding projection 3a can be reliably engaged with the cable rack upper flange 22 as described above. The effect is obtained.

[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 vertical sectional side view of FIG. 1;

FIG. 4 is a partial plan view of the first embodiment of the present invention.

FIG. 5 is a partially cutaway front view of the first embodiment of the present invention.

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

FIG. 7 is a partial longitudinal 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. 9A is a longitudinal sectional front view illustrating a fastener applied in the present invention, and FIG. 9B is a longitudinal sectional front view showing another example of the same fastener applied in the present invention.

FIG. 10 is a vertical sectional front view showing another example of the fastener used in the present invention.

FIG. 11 is a plan view of the same.

FIG. 12 is a sectional view of FIG. 11;

FIGS. 13 (a), (b) and (c) are cross-sectional views showing stepwise a temporary fixing process when the fastening tool of FIGS. 10 to 12 is used.

[Explanation of symbols]

 1, 1 'groove-shaped rail 2 cable rack 2a, 2a girder member 3 steady rest 3a grounding projection 4 fastening fitting 4a nut 4b, 4b fastening piece 4c elastic body 4d elastic body 5 screw 22 upper flange 30 seat part 31 rising part 32 Clamp part 200 Base 201 Protective film 361 Claw piece 362 Embossed projection

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yoshio Onishi 31-19, 2 Ageo-cho, Yao-shi, Osaka (72) Inventor Masakatsu Onishi 1881-45, Kanaoka-cho, Sakai-shi, Osaka (56) References Hirai 6 -52320 (JP, U) JP-A 4-61415 (JP, U) JP-A 5-80117 (JP, U) JP-A 58-53374 (JP, U) JP-A 57-75483 (JP, U) ) Actually open sho 59-52570 (JP, U) Actually open sho 55-162321 (JP, U) Actually open sho 59-135014 (JP, U) Actually open 1-71914 (JP, U) Actually open 63018 (JP, U) Jiko 51-6705 (JP, Y2)

Claims (4)

(57) [Claims] An upper portion of a rising portion corresponding to a girder member of a cable rack has a seat portion seated on an upper surface of a grooved rail. The clamp portion 32 to be contacted is formed in a bent shape, 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. 2. A cable rack anti-vibration metal fitting, wherein a groundable projection 3a is punched out on the surface of the upper flange. 2. A front V-shaped or similar claw piece 361 stamped out so that the grounding projection 3a extends over a long side of a hole 360 formed in the clamp portion 32.
The cable rack steady rest according to the above. 3. The cable rack anti-vibration fitting according to claim 2, wherein the grounding projection 3a is a projection 362 projecting a required height from the lower surface of the clamp portion 32 by locally projecting the clamp portion 32. 4. A through hole 30 provided in a seat portion 30 of a fastening tool 4.
The nut 4a is screwed through a screw 5 passing through the screw 5 and a horizontal shaft 40, 40 attached to a nut portion at a position displaced from the screwing position of the screw 5, and is tilted about the horizontal shaft 40, 40 as a fulcrum. A pair of left and right tightening pieces 4b, 4b that can be expanded and contracted by rolling, and hold the tightening pieces 4b, 4b in the maximum expanded state in a normal state, and return to the expanded state even when the tightening pieces 4b, 4b are narrowed. Elastic body 4 for restoring
c, an elastic body 4d for biasing in the axial direction for keeping the fastener 4 at a predetermined distance from the seat 30 in a normal state.
The cable rack steady rest according to claim 1, comprising: