JPS642821Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to a fixing clamp for positioning and fixing a contact wire covered with an insulating cover.

An insulated trolley, which covers a contact wire with an insulating cover, is generally installed on the ceiling of a factory together with a rail for a moving hoist, and is used to supply power to the moving hoist. The contact wire is inserted into the cover so as to be movable in the length direction with respect to the insulating cover, taking thermal expansion and contraction into account. When such an insulated trolley is disposed on a ceiling or the like, it is necessary to position and fix an appropriate midway portion of the contact wire in the length direction for reasons such as providing a base point for thermal expansion and contraction.

(Prior art) As a conventional fixing structure, for example, as shown in FIG. 1, horizontal holes 3 and 4 for bolt insertion are formed in an insulating cover 1 and a contact wire 2, respectively, and a resin insulating bolt 5 is used to connect the cover 1 and the contact wire. Wire 2 is tightened to fix the contact wire in position in the length direction. However, in such a conventional structure, the horizontal holes 3 and 4 must be formed in the insulating cover 1 and the contact wire 2 at the installation site of the insulated trolley, which takes time and effort to fix. Furthermore, even if the insulating bolt 5 is used, there is a risk of electrical leakage from the bolt 5 due to the influence of moisture or the like. Furthermore, by providing the horizontal hole 4 in the contact wire 2 itself, the electrical resistance of the contact wire 2 at the fixed portion increases, resulting in poor power supply performance.

(Purpose of the invention) The present invention aims to solve the above-mentioned problems, and eliminates the need to drill holes in the insulating cover and contact wire at the fixed part, thereby making the fixing work easier. The purpose is to eliminate the risk of electrical leakage from fixed parts.

(Structure of the invention) As a means to achieve the above object, the present invention combines a pair of fixed clamp members to constitute a fixed clamp, which engages with a pair of grooves in an insulating cover and connects a contact wire through the cover. The protrusion that pinches the
At least one protrusion is formed on each of the clamp members, and the pressing direction of the protrusion is directed toward substantially the center of gravity of the cross-sectional shape of the contact wire.

(Embodiment) FIG. 2 shows an embodiment of a fixing clamp 10 used for fixing a small-sized contact wire 2. In this Figure 2, a small-sized contact wire 2
refers to a contact wire with a short vertical width, and the contact wire 2 has a downward cup-shaped cross section. That is, it has a pair of left and right protrusions 11, a recess 12, and the like. The inner peripheral surface of the upper half of the insulating cover 1 is formed in a shape corresponding to the outer peripheral shape of the contact wire 2, and the contact wire 2 is held within the insulating cover 1 so as to be movable in the length direction and not to fall off. There is.

A pair of left and right grooves 13 are formed on the outer circumferential surface of the upper half of the insulating cover 1, and the grooves 13 are formed at approximately the same height as the recess 12 of the contact wire 2. Extends the entire length. The protrusion 20 of the clamp 10 fixed in the groove 13
are engaged with each other to clamp the contact wire 2 through the cover 1 toward the center of gravity G of the cross-sectional shape of the contact wire, thereby fixing the contact wire 2 in position in the length direction.

The fixed clamp 10 consists of a pair of left and right aluminum alloy clamp members 21 and 22, both members 21 and 22 having bolt insertion holes 23, and bolts 24 and nuts 25 inserted into the insertion holes 23. Both members 21 and 22 are integrally fastened. Each clamp member 21, 22 has an arm portion 21a, 22a that extends downward, and each arm portion 21
a and 22a are opposed to each other at a distance in the left-right direction, and protrusions 20 are formed on opposing surfaces of each arm portion 21a and 22a, respectively. Each protrusion 20
The vertical end surfaces 20a of these contact wires are in contact with the vertical bottom of the groove 13, and the pressurizing direction P is directed approximately toward the center of gravity G of the contact wire 2. That is, in the one shown in FIG. 2, pressure is applied generally horizontally by the vertical surface 20a of the tip of the protrusion, and the contact wire 2 is fixed in position in the length direction at the pressurized portion.

In FIG. 3, which is a view taken in the direction of the arrows in FIG. 2, two protrusions 20 are provided on each member 21, 22 at intervals in the length direction. That is, one clamp 10 is provided with two pairs (four pieces) of the protrusions 20. By providing two pairs of protrusions 20 having such short lengths, the surface pressure of the clamping pressure portion is increased and the gripping force is improved. Note that 31 in Figure 3
A hanger 31 holds the insulating cover 1 movably in the longitudinal direction, and the insulating cover 1 is suspended from the ceiling by this hanger 31. The fixing clamps 10 are arranged, for example, on both sides of the hanger 31 as described above.

FIG. 4 shows an embodiment in which a large-sized contact wire 2' is fixed, and parts corresponding to those in FIG. 2 are given the same numbers as in FIG. 2. A large-sized contact wire 2' is a contact wire with a long vertical width. For example, a substantially rectangular foot portion 2'a (Fig. 4) is attached to the lower side of the small-sized contact wire 2 shown in Fig. 2. It has a shape that looks like it was formed in one piece. therefore its center of gravity
G' is at a lower position than the small size one in Figure 2. The lower surface 32 of the protrusion 20 is formed in an inclined shape, and the inclined lower surface 32 is in contact with the lower inclined surface 33 of the groove 13 . That is, the protrusion 20 makes the center of gravity of the insulating cover 1 by its inclined lower surface 32.
It is clamping towards G′. Arrow P' is the pressurizing direction. Further, a recess 35 and a claw 36 are formed at the upper end portions of each of the clamp members 21 and 22 in FIG. 4, and the engagement between the recess 35 and the claw 36 allows
This prevents the clamp members 21 and 22 from shifting in the vertical direction or in the length direction.

As shown in FIG. 5, each clamp member 21, 22 is provided with one claw portion 36, and each clamp member 21, 22 is also provided with one recess portion 35. That is, the clamp 10 as a whole is provided with two sets of the recessed part 35 and the claw part 36 at intervals in the length direction.

In each of the above embodiments, each clamp member 21,
Although two short protrusions 20 are formed on each of the clamp members 22, in the present invention, one long protrusion may be formed on each of the clamp members 21 and 22.

(Effects of the Invention) As explained above, in the present invention, the fixed clamp 10 is constructed by combining a pair of clamp members 21 and 22, which engages with a pair of grooves 13 of an insulating cover 1 and is connected to a fixed clamp 10 through the cover 1. A protrusion 20 for pinching the contact wires 2, 2' is attached to each member 21, 21.
Since the contact wires 2, 2' are formed one by one and the contact wires 2, 2' are fixed in position in the length direction from the outside of the cover 1 using the protrusion 20, the insulating cover 1, contact wires 2, 2' are There is no need to form a bolt insertion hole for position fixing in ', and the work of fixing the contact wires 2, 2' becomes easier. Furthermore, since there is no need to form bolt insertion holes in the contact wires 2, 2', electrical resistance does not increase rapidly at the fixed portions, and good power supply performance can be maintained. Further, the strength of the fixed portion does not decrease.

Since the contact wires 2, 2' are fixed from the outside of the insulating cover 1, there is no risk of electrical leakage from the fixed portions.

Since the pressing direction of the protrusion 20 is directed toward substantially the center of gravity G, G' of the cross-sectional shape of the contact wire, the contact wires 2, 2' can be securely fixed.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional view of a conventional example, Fig. 2 is a longitudinal sectional view showing an embodiment of a fixed clamp to which the present invention is applied, Fig. 3 is a view taken in the direction of the arrow in Fig. 2, and Fig. 4 is a longitudinal sectional view of another example. FIG. 5 is a longitudinal sectional view showing the embodiment, and FIG. 5 is an exploded view taken along the V arrow in FIG. 4. 1...Insulation cover, 2, 2'...Trolley wire, 1
0... Fixed clamp, 13... Groove, 20... Projection, 21, 22... Clamp member.

Claims (1)

[Scope of utility model registration request] In a fixed clamp for fixing the position of a contact wire covered with an insulating cover in the length direction, a pair of fixed clamp members are combined to form the fixed clamp, and the fixed clamp is engaged with a pair of grooves in the insulating cover and is inserted through the cover. forming at least one protrusion on each of the clamp members for clamping the contact wire;
A fixed clamp for an insulated trolley, characterized in that the pressing direction of the protrusion is directed toward substantially the center of gravity of the cross-sectional shape of the contact wire.