JPH0527300Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Technical Field] This invention relates to an insulated trolley wire hole machining jig used for machining a through hole for attaching an insulating piece for circuit division, etc. to an insulated trolley wire.

[Background technology]

Conventionally, as shown in FIGS. 5 and 6, as an insulated trolley wire 1, a plurality of rectangular conductors 2 are embedded in an insulator 3 with one side exposed, and a guide protrusion 4 for guiding a current collector is inserted into the conductor 2. There are parts that protrude integrally with the insulator 3 along both sides of the exposed surface of the insulator 3. Conductor 2 is 2
This is a stack of unit conductors 2A and 2B.

In such an insulated trolley wire 1, the conductor 2 serving as a signal line is cut by forming a through hole 5,
Circuit division is being carried out. This through hole 5
It was proposed to install an insulating piece device 8 consisting of an insulating piece body 6 and a guide insulator 7 as an insulating means. Insulating piece body 6 and guide insulator 7
This means that the insulated trolley wire 1 is sandwiched from both sides and fixed to each other with fixing screws 9. The guide insulator 7 has a cylindrical portion 7a that fits into the through hole 5 of the insulated trolley wire 1.
and a pair of guide pieces 7b that extend along the outside of the guide protrusion 4 of the insulated trolley wire 1 and fill in the notched portion of the guide protrusion 4 in the through hole 5. The insulating piece main body 6 has a plug blade 11 to which a signal wire 10 for power supply to the conductor 2 is connected, and the plug blade 11 has a coating removal hole 12 formed in the non-conductor exposed side surface of the insulated trolley wire 1 (Fig. ) to contact conductor 2. 13
is a plugged spring.

As shown in FIG. 6, the covering exposure hole 12 is bored with an end mill type tool 14, and the through hole 5 is bored with a hole saw type tool 15 from the guide protrusion 4 side.

As shown in FIG. 10, this hole saw type tool 15 has a cutting blade 16 whose tip opening edge is a cutting edge 16a.
and a drill bit 17 protruding from the tip at the axial center position of the blade cylinder 16, and is attached to a drill device. According to this, the drill bit 17 is inserted between the pair of guide protrusions 4 of the insulated trolley wire 1 to make a pilot hole in the conductor 2, and the cutting tool 16 is inserted into the insulator 3 and the conductor 2 to form a through hole 5 with a large diameter d. form. After drilling, the conductor 2 is cut to obtain the insulation dimension H, as shown in FIG.

However, the dimension b between the guide ridges 4 of the insulated trolley wire 1 varies widely due to molding, and when this dimension b is large, the drill bit 17 cannot be guided by the guide ridges 4. Therefore, as shown in Figure 12, the conductor 2
The center of the blade and the center of the blade barrel 16 are shifted by ΔX, and the first
As shown in FIG. 3, a through hole 5 is formed eccentrically in the conductor 2. Therefore, the insulation dimension h becomes smaller on one side of the through hole 5, and the electrical insulation becomes worse. Moreover, as shown in FIG. 12, the insulator 3 of the insulated trolley wire 1 is cut off between the width Z due to eccentricity, and insulation with the outside is no longer possible.

[Purpose of invention]

The object of this invention is to provide a hole-machining jig for an insulated trolley wire that can easily make holes in an insulated trolley wire without eccentricity with respect to the conductor.

[Disclosure of invention]

The insulated trolley wire hole machining jig of this invention has a conductor embedded in an insulator with one side exposed, and a pair of guide protrusions provided on the insulator along both sides of the exposed surface of the conductor. A processing jig for an insulated trolley wire used for hole drilling is provided with a jig main body through which a guide hole into which the cutting tool of the hole processing tool is rotatably inserted is provided, and the insulated trolley wire is attached to the bottom of the jig main body. The present invention is characterized in that a positioning notch is provided into which the pair of guide protrusions of the wire fit.

According to the configuration of this invention, the jig main body is provided with a positioning notch into which the pair of guide protrusions of the insulated trolley wire fit, so that the jig main body is positioned at the center of the conductor by the guide protrusions of the insulated trolley wire. Ru. Since the cutting tool of the hole-machining tool can be fitted into the guide hole provided in the jig body to perform hole machining, the hole-machining tool does not become eccentric, and the hole can be accurately drilled in the center of the conductor. In addition, this jig only needs to be placed on the insulated trolley wire by fitting its guide protrusion.
Since positioning work and fixing work are not required, jig installation work is simple and hole machining can be performed easily.

Embodiment An embodiment of this invention will be explained based on FIGS. 1 to 3. This insulated trolley wire hole machining jig 20 is a jig used for hole machining of the insulated trolley wire 1 having the above-described configuration, and has a guide hole 22 into which the blade tube 16 of the hole machining tool 15 is rotatably fitted. A thick cylindrical jig main body 21 is provided, and a positioning notch 23 is provided on the bottom surface of the jig main body 21, into which a pair of guide protrusions 4 of the insulated trolley wire 1 are fitted. The hole machining tool 15 is of the aforementioned hole saw type. The jig main body 21 may be made of resin or metal. Also,
The cross-sectional shape of the outer circumferential surface of the jig main body 21 is not particularly limited, and may be rectangular. If necessary, a center mark 2 is placed on the top surface of the jig main body 21 as shown in FIG.
Apply step 4.

Figure 3 shows the hole machining operation using this jig.
This figure shows the process of forming one through hole 5 and then drilling a hole next to it. Insulated trolley wire 1 is connected to wooden base 2
6, and this jig 20 is placed on the insulated trolley wire 1 by fitting the positioning notches 23 into the pair of guide protrusions 4 of the insulated trolley wire 1. In this state, the hole machining tool 15 is inserted into the guide hole 22 of the jig main body 21.
Insert and drill holes. FIG. 4 shows a state in which the two through holes 5 have been completed and a coating removal hole 12 has been provided.

According to the jig having this configuration, the jig main body 21 is provided with the positioning notches 23 into which the pair of guide protrusions 4 of the insulated trolley wire 1 fit, so that the jig main body 21 is insulated. The trolley wire 1 is positioned at the center of the conductor 2 by the guide protrusion 4 . Since the cutting tool 16 of the hole-machining tool 15 can be inserted into the guide hole 22 provided in the jig body 21 to perform hole-machining, the hole-machining tool 15 will not be eccentric and will be centered on the conductor 2. Accurate hole machining is possible. In addition, this jig 20 only needs to be placed on the insulated trolley wire 1 by fitting its guide protrusion 4, and no positioning or fixing work is required. Can be processed.

[Effect of idea]

The insulated trolley wire hole machining jig of this invention has a positioning notch in the jig body into which the pair of guide protrusions of the insulated trolley wire fit, so that the jig body can be easily connected to the conductor by the guide protrusions of the insulated trolley wire. is positioned at the center of Since the cutting tool of the hole-machining tool can be fitted into the guide hole provided in the jig body to perform hole machining, the hole-machining tool does not become eccentric, and the hole can be accurately drilled in the center of the conductor. In addition, this jig only needs to be placed on the insulated trolley wire by fitting its guide protrusion, and there is no need for positioning or fixing work, so the jig installation work is simple and holes can be easily drilled. effective.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of one embodiment of this invention in use, Fig. 2 is a perspective view thereof, Fig. 3 is a perspective view of the same in use, and Fig. 4 is hole drilling with the jig of the same embodiment. Fig. 5 is an exploded perspective view showing the conventional insulated trolley wire and the proposed insulating piece, Fig. 6 is an explanatory diagram of the hole drilling method, and Fig. 7 is an exploded perspective view of the insulated piece. 8 is a front view of the same insulating piece, FIG. 9 is a sectional view of the insulating piece in its unattached state, FIG. 10 is a sectional view showing the conventional hole drilling method, and FIG. 11 is a diagram of the conductor FIG. 12 is a partial sectional view showing the relationship between the through holes, FIG. 12 is a partial plan view showing the eccentric state of the tool, and FIG. 13 is a partial sectional view showing the conductor and the eccentric hole. DESCRIPTION OF SYMBOLS 1... Insulated trolley wire, 2... Conductor, 3... Insulator, 4... Guide protrusion, 15... Tool, 16...
...Blade barrel, 20...Jig, 21...Jig body, 22
... Guide hole, 22 ... Positioning notch.

Claims (1)

[Scope of utility model registration request] A hole machining jig for an insulated trolley wire used for machining holes in an insulated trolley wire, the conductor being embedded in an insulator with one side exposed, and a pair of guide protrusions provided in the insulator along both sides of the exposed surface of the conductor. In this method, a jig main body is provided through which a guide hole into which a cutting tool of a hole machining tool is rotatably inserted is provided, and the pair of guide protrusions of the insulated trolley wire are fitted into the bottom surface of the jig main body. A hole machining jig for an insulated trolley wire, characterized by having a positioning notch.