JPS5848295Y2 - Tank truck grounding cord reel - Google Patents

Description

[Detailed Description of the Invention] This invention relates to an improvement of a grounding cord reel for a tank lorry.

Conventionally, tank trucks that transport 1 and 2 petroleum products over land have a grounding cord reel attached to the vehicle chassis, and the cord is wrapped around the cord reel during cargo handling at refineries (or oil depots) and gas stations. The equipment is equipped so that the grounding cord can be pulled out and connected to the nearest existing grounding equipment using a clip, allowing static electricity generated by vibration, shock, friction, etc. during cargo handling to escape to the ground.

However, tank trucks, which have been widely used in the past,
The grounding cord reel has one end of a coil spring inserted through the center shaft fixed to the center of one stationary side board that has the center shaft of the reel attached to the chassis with a bracket, and the other end of the reel with a handle rotates. A winding drum with an integrated side plate is inserted into the center shaft so as to hide the coil spring, and the other end, which is the free end of the coil spring, is always engaged with the rotating side plate by spring action. The structure is such that the earth cord is fixed with a nut at the tip, the starting end is fixed to the winding drum, and the earth cord with a clip attached to the tip is wound around the winding drum by rotating the handle. is constructed so that it flows from the stationary side plate of the reel, through the coil spring, to the rotating side plate, and then from the winding drum, through the ground cord, and from the clip to the earth through the ground equipment. In a cord reel, the free end spring seat of the coil spring integrated into the fixed side plate on the fixed side of the chassis and the rotating side plate on the rotating side constitute a rotating contact conduction part for the earth current, which is in constant contact with the rotating side plate on the rotating side. The conduction part lacks safety because it is a line contact between the free end spring seat of the coil spring and the rotating side plate, and contact failure is very likely to occur due to the rotation of the rotating side plate, so the grounding function of the tank lorry is There was a major drawback in that it was severely hindered.

In addition, since the conventional grounding cord reel that was cut is an exposed type, each conductive part, especially the rotating contact conductive part mentioned above, is easily exposed to wind and rain and rusts or corrodes, and this rusting and corrosion can also cause poor contact. There were drawbacks such as bringing about

This invention has been made in view of the above, and is intended to solve the above-mentioned conventional drawbacks by providing a grounding cord reel for a tank lorry as described below.

The tank lorry-grounding cord reel of this invention will be described in detail with reference to the drawings. 1 is a conductive material such as an iron plate having a bracket 4 for winding around the chassis and having a central shaft 3 integrally protruding from the center. It is a cylindrical body made of material, and an axial conduction hole 2 is provided on the outer periphery.

Na-hla is the front opening, and 1b is the bottom of the rear end.

Reference numeral 5 denotes a spring cover 5 in which an annular contactor 7 made of steel plate or the like is added concentrically to the outer surface of a front cover part 5a having a central hole 5b using mounting screws 8, so that the majority is hidden by the spring cover 5. A coil spring 6 is inserted into the inside of the coil spring 6, and one end of the coil spring 6 is fixed to the front cover plate @5a.

- The coil spring 6, the majority of which is hidden by the spring cover 5, has the coil spring 6 and the center hole 5b as the central axis 3.
The other end of the coil spring 6 is integrally fixed to the rear end bottom (bottom surface) lb of the cylindrical body 1.

It goes without saying that the spring cover 5 is also made of a conductive material such as an iron plate.

9, an iron plate or the like, on which an annular contact 11 corresponding to the annular contact 7 is attached concentrically to the center of the inner surface of a drawing board 9a having a handle 10 near the outer periphery of the outer surface and a center hole 9c; The reel is made of a conductive material, and 9b is a rear collar portion, and 9d is a winding body portion.

An earth cord 13 is wound around the winding drum @9d of the reel 9, and the starting end of the wire is fixed with a mounting screw 14.

Therefore, in the reel 9, the winding drum @9d is connected to the spring cover 5,
The central shaft 3 is inserted through the central hole 9c of the housing, and is loosely fitted into the cylindrical body 1, so that the inner annular contacts 7 and 11 can rotate freely while always being in surface contact by the action of the coil spring 60. It is fixed with a thumbscrew 17 screwed into the threaded part 3a at the tip of the central shaft 3.

N>16 is a washer.

The earth cord 13 wound around the winding body 9d of the reel 9 is pulled out through the conduction hole 2 of the cylindrical body 1, and a clip 15 for connecting to the existing earth equipment is attached at the tip of the earth cord 13. installed.

The grounding cord reel of this invention has the above structure and is integrally attached to the chassis 18 of a tank truck by the bracket 4 of the cylindrical body 1.

Therefore, when the tank lorry is not grounded, such as during transport, the handle 10 is turned in advance and the ground cord 13 is wound and stored on the winding drum @9d of the reel 9.

Now, when handling cargo at an oil refinery (or oil depot) or gas station, hold the clip 15 at the tip and pull out the ground cord 13 wound around the reel 9.
5 is clamped to the nearest existing grounding equipment and connected and grounded.

Therefore, when static electricity is generated during loading and unloading of tankers, the generated current flows from the chassis 18, through the bracket 4, through the cylindrical body 1, to the coil spring 6, and then to the spring cover 5, and then to the inner annular contact which is in surface contact. It flows to the reel 9 via the wires 7 and 11, further flows through the strands of the earth cord 13, and flows from the tip clip 15 to the earth via the earth equipment.

The grounding cord reel for a tank lorry according to this invention is as described above, and one end is fixed to the front cover part 5a, which has an annular contact 7 concentrically added to the outer surface, and the majority is hidden by the spring cover 5. A coil spring 6 is inserted through the central shaft 3 and housed in the cylindrical body 1, the other end is fixed to the bottom surface of the cylindrical body 1, and the coil spring 6 is inserted into the center of the inner surface of the drawing board 9a having the handle 10 on the outer surface. An annular contact 11 corresponding to the annular contact 7 is attached concentrically with a ring 9 which is inserted through the spring cover 5 and the central shaft 3 and loosely fitted into the cylindrical body 1, and the coil spring 60
The inner annular contacts 7 and 11 are fixed with thumbscrews 17 screwed into the center shaft 3 so that they can rotate freely while always being in surface contact. The structure of the rotating contact conduction part that is likely to cause defects is the fixed side annular contact 7 attached to the spring cover 5 that encloses and protects the fixed side coil spring 6, and the rotating side annular contact attached to the panel 9aK of the reel 9. In surface contact with 11, the coil spring 6
Because it has a structure where surface contact is always stable due to the action of
Even after long-term use, the tank lorry does not cause poor contact, and the tank lorry always maintains a stable and reliable grounding function, which has an outstanding effect of contributing to safe cargo handling.

In addition, since the end spring seat of the coil spring 6 does not directly act on the inner annular contacts I and 11 in surface contact, but acts through the spring cover 5, the repulsive force of the coil spring 60 is an unbalanced load. Instead, it always acts uniformly on the annular contacts 7 and 11 in surface contact, making it possible to rotate the reel 90 smoothly and easily, and the spring cover 5 suppresses distortion of the coil spring 6. It has excellent effects such as increasing stability.

Also, due to long-term use, the surface contact ring contact 711
When the thumbscrew 17 is worn out, adjust it by screwing it in and screwing it back.
The surface contact pressure can always be properly adjusted and maintained.

Furthermore, in the grounding cord reel of this invention, the coil spring 6, the spring cover 5, and the surface-contact annular contact 7. Since it is hidden and stored inside the cylindrical body 1, it may rust due to exposure to wind and rain.
It has great effects such as there is no risk of corrosion and the grounding function will not deteriorate due to poor contact caused by it.

In addition, this invention has the advantage that the reel 90 can be easily assembled and disassembled by screwing and unscrewing the wing screw 17, so that when the annular contacts 7 and 11 become extremely worn out, they can be easily replaced and repaired. be.

[Brief explanation of drawings]

The drawings show an embodiment of the tank lorry grounding cord reel of this invention, with FIG. 1 being a perspective view and FIG. 2 being an enlarged longitudinal sectional side view of the main parts. 1... Cylindrical vessel body, 1a... Front end opening, 1b...
Rear end bottom, 2... Conduction hole, 3... Central axis, 3a...
・Screw shaft, 4...bracket, 5...spring cover,
5a...Anterior cover plate anatomy, 5b...Central hole, 6...Coil spring, 7...Annular contactor, 8...Mounting screw, 9...
...Reel, 9a...Panel, 9b...Rear flange, 9c
... Center hole, 9d... Winding trunk, 10... Handle, 1
1... Annular contactor, 12... Mounting screw, 13...
Earth cord, 14...Mounting screw, 15...Clip, 16...Washer, 17...Thumb screw, 18...
chassis.

Claims (1)

[Scope of utility model registration request] A coil spring 6 whose one end is fixed to a front cover plate 5a with an annular contact 7 concentrically added to the outer case and whose majority is hidden by the spring cover 5 is inserted through the central shaft 3 and fixed to the chassis. It is housed in a cylindrical body 1 having a bracket 4 for use, and its other end is fixed to the bottom surface of the cylindrical body 1, and corresponds to the annular contact 7 at the center of the inner surface of a drawing board 9a having a handle 10 on the outer case. An annular contact 11 is attached concentrically with a ring 9 inserted through the spring cover 5 and the center shaft 3 and loosely fitted into the cylindrical body 1. The earth cord 13 is fixed with a thumbscrew 17 screwed onto the tip of the central shaft 3 so that the wires 7 and 11 can rotate freely while always being in surface contact, and the wire at the starting end is fixed and wound around the reel 9. This cord reel is for grounding a tank lorry, and is made of a cord reel for grounding a tank lorry, in which a clip 15 is attached to the tip of the cord which is brought out through a conduction hole 2 of a cylindrical body 1 to the outside.