JPH055677Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a saddle unit, particularly its grounding structure.

[Conventional technology]

FIG. 4 is a sectional view showing a conventional saddle. In the figure, 1 is a rubber wheel, 2 is a pair of saddle bodies that rotatably support the rubber wheel 1 at both ends, and 3 is a sectional view of each saddle body 2. A pair of rotatably supported guide wheels 4 are rails made of grooved steel on which the rubber wheels 1 roll, and are configured to have a width slightly smaller than the distance between them and the pair of guide wheels 3.

Next, the operation will be explained. Rubber wheels 1 are rotated by an electric motor (not shown) via a chain or gears (not shown), and the saddle body 2 on the rails 4 travels. On the other hand, a pair of guide wheels 3
When the center position of the rail 4 and the saddle body 2 deviates, the guide wheel 3 comes into contact with the side surface of the rail 4,
The discrepancy will be corrected.

[Problem that the invention attempts to solve]

Since the conventional saddle unit is constructed as described above, static electricity is accumulated due to the rotation of the rubber wheel, and for example, in the case of polyurethane, several hundred volts of static electricity is generated in two to three rotations. However,
As the guide wheels repeatedly move in and out of contact with the rails while the main body is running, not only are they unable to sufficiently release the accumulated static electricity, but they are also insufficiently grounded in the event of an electrical leakage. This caused problems such as the risk of electric shock during crane operations.

This idea was made to solve the problems mentioned above, and it provides a saddle unit that not only can ground the main body reliably and prevent the accumulation of static electricity, but also can reliably prevent electric shock accidents caused by leakage current. The purpose is to

[Means for solving problems]

The saddle unit according to this invention includes: a metal saddle body to which an electric motor is attached; a rubber wheel rotatably supported by the saddle body and for causing the saddle body to travel on a metal rail; and a rubber wheel coupled to the saddle body. A vertically arranged cylinder, a cylindrical shaft supported vertically on the cylinder, a horizontal boss connected to the lower end of the cylindrical shaft, a rotating shaft rotatably supported on the horizontal boss, and a cylinder shaft supported on the cylinder for vertical movement. A detent member that is coupled to the horizontal boss and restricts rotation of the horizontal boss, a circular wire brush that is coupled to both ends of the rotating shaft, and a circular wire brush that elastically presses the cylindrical shaft downward. and a pressing means for pressing the circular wire brush against the rail.

[Effect]

In the saddle unit of this invention, the cylindrical shaft is supported by the cylindrical body so that it can move up and down, and the cylindrical body is connected to the saddle body. The circular wire brush is positioned with respect to the traveling direction by preventing its rotation with the rotation stopper member.

[Example of idea]

An embodiment of this invention will be described below with reference to the drawings. In FIGS. 1 to 3, reference numeral 5 denotes a mounting base supported by bolts 6 on the saddle body 2, 7 is a cylindrical guide connected to the mounting base 5 and arranged vertically, and 8 is a cylindrical guide inside the guide 7. A cylindrical sliding shaft is loosely fitted so as to be movable up and down, 9 is a cylindrical horizontal boss connected to the lower end of the sliding shaft 8, and 10 is a pair of horizontal bosses fitted on the inner periphery of both ends of the horizontal boss 9. A ball bearing, 11, is a rotating shaft rotatably supported by this horizontal boss 9, 12
13 is a pair of outer flanges facing the pair of inner flanges 12, and 14 is a pair of circular wires fitted to the pair of outer flanges 13. A brush 15 is screwed onto the rotating shaft 11, a pair of nuts connecting the circular wire brush 14 between the outer flange 13 and the inner flange 12, 16 a retaining ring coupled to the outer periphery of the sliding shaft 8, and 17 a retaining ring. A compression coil spring is disposed between the bottom of the guide 7 and the retaining ring 16, 18 is a retaining pin fitted to the upper end of the sliding shaft 8, 19 is coupled to the guide 7, and its lower end is connected to the horizontal boss 9. A rotation preventing member for the horizontal boss 9 is constituted by the plates facing each other in close proximity to the horizontal boss 9. 20 is an electric motor located on the side of the pair of saddle bodies 2.

Next, the operation will be described. The rubber wheel 1 is rotated by the electric motor 20 via a gear or the like (not shown), and the saddle body 2 runs on the rail 4. On the other hand, a wire brush 13 is mounted on the rotating shaft 1 on the rail 4.
1 and a bearing 10 so as to be rotatably connected to each other. Further, a compression coil spring 17 is disposed within the guide 7, and this compression coil spring 17 elastically presses the sliding shaft 8 downward via a retaining ring 16. For this reason, the horizontal boss 9, the rotation axis 1
1. The circular wire brush 14 is pressed downward, and the circular wire brush 14 rolls in secure contact with the upper surface of the rail 4. Incidentally, when the saddle body 2 moves, rocking of the saddle body 2 is unavoidable. However, since the wire brushes 14 are in contact with the rails 4 and are composed of a pair, even if the saddle body 2 swings, one of the wire brushes 14 will always come into contact with the rails 4. I will do it. Here, since the saddle body 2, the mounting base 5, the guide 7, the sliding shaft 8, the horizontal boss 9, the rotating shaft 11, and the wire brush 14 are each made of metal, they are securely grounded and prevent the accumulation of static electricity, etc. are doing. On the other hand, when the sliding shaft 8 is about to rotate relative to the guide 7, the plate 19 connected to the guide 7 approaches the horizontal boss 9 via the small A dimension, and the horizontal boss 9, i.e. sliding shaft 8
The rotation of the wire brush 14 is restricted, and the wire brush 14 is reliably positioned in the advancing direction.

In the above embodiment, the mounting base 5 and the support 6 are made of metal material, but the saddle 2 and the shaft 8 are
If electrically connected with electric wire etc., the above mounting base 5
Even if the support 6 is made of non-metallic material, the same effects as in the above embodiment can be achieved.

[Effect of idea]

As described above, according to this invention, there is provided a metal saddle body to which an electric motor is attached, a rubber wheel that is rotatably supported by the saddle body and allows the saddle body to run on a metal rail, and A cylindrical body that is connected and arranged vertically, a cylindrical shaft that is vertically movably supported on this cylindrical body, a horizontal boss that is connected to the lower end of this cylindrical shaft, a rotating shaft that is rotatably supported on this horizontal boss, the above-mentioned A detent member that is coupled to the cylindrical body and faces the horizontal boss and restricts the rotation of the horizontal boss, a circular wire brush that is coupled to both ends of the rotation shaft, and elastically presses the cylindrical shaft downward. By doing so, the circular wire brush is equipped with a pressing means that presses it against the rail, so the main body can be reliably grounded, and the accumulation of static electricity can be prevented.The wire brush has an extremely simple structure and can be positioned in the direction of movement. It has the effect of

[Brief explanation of drawings]

Fig. 1 is a sectional view of a main part showing an embodiment of this invention, Fig. 2 is a partial sectional view taken along the - line,
Figure 3 is a plan view showing the entire saddle unit, Figure 4 is a plan view showing the entire saddle unit.
The figure is a sectional view of a conventional saddle unit. In the figure, 1 is a rubber wheel, 2 is a saddle body, 4 is a rail, 5 is a mounting base, 7 is a guide, 8 is a sliding shaft, 9
14 is a horizontal boss, 14 is a wire brush, 17 is a compression coil spring, 19 is a plate, and 20 is an electric motor. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Scope of utility model registration request] a metal saddle body to which an electric motor is attached; a rubber wheel rotatably supported by the saddle body to allow the saddle body to run on a metal rail; a cylindrical body coupled to the saddle body and arranged vertically;
A cylindrical shaft supported by this cylindrical body for vertical movement, a horizontal boss connected to the lower end of this cylindrical shaft, a rotary shaft rotatably supported by this horizontal boss, a rotary shaft connected to the cylindrical body and connected to the horizontal boss. A rotation preventing member that faces the horizontal boss and restricts rotation of the horizontal boss, a circular wire brush coupled to both ends of the rotating shaft, and a circular wire brush that elastically presses the cylindrical shaft downward, rotates the circular wire brush as shown above. A saddle unit equipped with a pressing means that presses against the rail.