JPH04363878A - Expansion/contraction absorbing jumper part - Google Patents

Abstract

PURPOSE:To prevent the fatigue of a cable by wind pressure and vibration while allowing the movement of the cable as absorbing the thermal expansion and contraction of a panel. CONSTITUTION:A cable 15 extending over panels is curvedly extended on surfaces nearly vertical to wall surfaces along which panels 10 are laid, so that the cable 15 can be moved in parallel while making contact with the surface within the long window 30b of a saddle 30.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention provides a method for connecting connecting elements of these panels using flexible cables when panels in which connected elements such as coils are buried are arranged along a predetermined wall surface. Regarding the connected elastic absorption jumper part.

0002

2. Description of the Related Art Linear motor cars have attracted attention as a means of high-speed mass transportation, and various developments are currently underway to put them into practical use. Incidentally, a linear motor car uses magnetic force to levitate the car body, and at the same time, is given propulsion by the well-known linear motor principle.

FIG. 6 shows a cross-sectional view of the track of such a conventional linear motor car. As shown in the figure, the track 1 has a floor portion 1a and a side wall portion 1b, and a levitation coil 2 is arranged on the upper surface of the floor portion 1a. Furthermore, on the inner surface of the side wall portion 1b, a panel 3 in which a propulsion coil is embedded is provided.
is located.

A predetermined number of loop-shaped propulsion coils 9 are buried inside the panel 3, as shown in FIG. A predetermined number of connection terminals 4 are provided on the lower surface of the panel 3. For example, the propulsion coil 9 is periodically moved along the track wall surface (the above-mentioned side wall portion 1b) in the traveling direction of the linear motor car, such as U phase, V phase, W phase, U phase, V phase, etc. Arranged. The propulsion coils of the same phase are electrically connected in series to each other in sequence. The cable 5 shown in FIG. 7 is for connecting the respective propulsion coils in series, has connector plugs 6 at both ends, and is configured to be attached to the connection terminal 4 of the panel 3.

[0005]

[Problems to be Solved by the Invention] In reality, this panel 3 is formed to have a length of, for example, about 10 meters (m) to 15 meters in the direction of travel of the linear motor car, and is designed to handle changes in outside temperature. The thermal expansion and contraction due to this cannot be ignored. Therefore, there is a gap of about 100 millimeters (mm) between adjacent panels 3. in fact,
Due to thermal expansion and contraction, this distance increases or decreases by several tens of millimeters. Therefore, in order to absorb such fluctuations in the mutual spacing between the connecting terminals 4 due to thermal expansion and contraction of the panel 3, the cable 5 should have a structure that is resistant to repeated bending, and should be vertically bent as shown in FIG. A predetermined slack is provided at the bottom.

[0006] Furthermore, in order to alleviate the bending stress applied to the cable 5, a method is adopted in which the cable 5 is made into a loop with one turn, as shown on the right side of FIG. In such a case, a pit 7 is formed in the floor portion 1a directly below the panel 3 shown in FIG. 6 to accommodate the slack portion of the cable 5. However, there are places where it is easy to form such pits 7 and places where it is extremely difficult to form them. Further, if there is a limit to the depth of the pit 7, the bending radius of the cable 5 must be made small, but in order to extend the fatigue life due to repeated bending, it is preferable that the bending radius be larger. In particular, in linear motor cars and the like, long-term reliability of cables is an important issue.

[0007] Furthermore, because trains run at high speeds, large wind pressure is applied to cables installed right beside the trains. Furthermore, when using magnetic levitation, the cable is subjected to forces in the vertical and horizontal directions due to the electromagnetic force that acts between the magnetic field of the powerful superconducting magnet mounted on the train and the current flowing through the cable. According to actual measurements, this force reaches tens of kilograms.

These forces impose bending stresses on the cable,
Furthermore, it becomes a major factor that shortens the life of the cable. The present invention has been made with attention to the above points, and it is possible to connect cables by bending them with a larger radius without forming pits, etc., and to have a stretchable absorbing jumper part with good durability against wind pressure and electromagnetic force. The purpose is to provide the following.

[0009]

[Means for Solving the Problems] The elastic absorbing jumper section of the present invention includes a plurality of panels in which connected elements are integrated and arranged along a predetermined wall surface, and a plurality of panels extending between the panels, A cable that electrically connects between connected elements and the cable that is curved on a plane substantially perpendicular to the predetermined wall surface form a long window that can be moved in parallel while being in contact with the plane, and The present invention is characterized in that it includes a saddle for fixing the cable.

0010

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained in detail below using examples shown in the drawings. FIG. 1 is a top view showing an embodiment of the elastic absorbing jumper section of the present invention, and FIG. 2 is a front view thereof.

In the figure, a panel 10 is made of concrete or the like, and a large number of coils 11 are buried therein. As shown in FIG. 2, connection terminals 13 are connected to each coil 11 via lead wires 12, and a pair of connection terminals 13 are implanted on the lower surface of the panel 10, respectively. The illustrated coil 11 is referred to as a connected element in the present invention. These coils 11 are provided, for example, for U-phase, V-phase, and W-phase, respectively, and in the case of the figure, the coils 11 of the same phase of two adjacent panels 10 are electrically connected to each other via cables 15. .

In the case of linear motor car propulsion coils, more coils are embedded in each panel 10, but here, three coils 11 are shown for convenience of illustration. Here, the cable 15 connected to the connection terminal 13
Connector plugs 20 each consisting of a substantially L-shaped member are attached to both ends of the connector. Therefore, each cable 1
5 is installed approximately horizontally when viewed from the front as shown in FIG. 2, and is approximately perpendicular to the wall surface on which the panels 10 are arranged when viewed from the top as shown in FIG. In this case, the wire is extended in an arcuate manner in the horizontal plane. The offset width of the cable 15 due to this curvature is
Appropriate selection is made depending on the environment in which it will be installed.

Furthermore, as shown in FIG.
The saddle 3 is located near the maximum bending point of the main cable 15.
0 is attached. FIG. 1 shows a top view of the saddle 30, and FIG. 3 shows a front view of the saddle 30 and how it is attached to the linear motor car track.

In FIG. 3, a pair of levitation coils 2 are arranged on the upper surface of the floor portion 1a of the track 1. and,
A panel 10 in which a propulsion coil is embedded is arranged along the longitudinal direction of the track on the inner surface of the side wall portion 1b. A cable 15 is laid in a curved manner from the bottom surface of this panel 10 onto a floor portion 1a perpendicular to the side wall portion 1b where the panels 10 are arranged.

A saddle 30 as shown in the enlarged view in the figure is attached to the maximum curved portion of the cable 15. The saddle 30 has a substantially U-shaped cross section, and the cable 15
is placed on a protective plate 31 sandwiched between the saddle 30 and the floor portion 1a, and is inserted through a long window 30b formed by the saddle 30. In addition, saddle 30
and the protection plate 31 are both fastened and fixed to the track floor portion 1a by bolts 32.

Returning to FIG. 1 again, the long window 3 of the saddle 30
0b has curved surfaces 30a formed on both sides thereof so as not to damage the cable 15. In the expansion/contraction absorbing jumper section of the present invention having the above configuration, when the panel 10 thermally expands and contracts due to temperature changes, the degree of curvature of the cable 15 increases or decreases accordingly. For example, in the case of a linear motor car, this panel 10 is about 30 mm to 100 mm.
It expands and contracts by about a millimeter. Along with this, the cable 15 has a length of about several millimeters to several tens of millimeters,
It reciprocates on the floor portion 1a in the direction shown by the arrow ■ in FIG. In this case, since the cable 15 is fitted into the long window 30b of the saddle 30, no undue stress is applied to the cable 15.

On the other hand, as shown in FIG. 3, the cable 15 is restrained on the saddle 30 and the protective plate 31 so that almost its entire length is in contact with the floor portion 1a, so that it is not supported by the protective plate 31 and the floor portion 1a. This prevents the cable 15 from being bent significantly due to vibration or wind pressure. Therefore,
It is possible to prevent cable breakage due to vibration fatigue.

When supporting the cable 15 so as to be movable in the direction of the arrow {circle around (2)} shown in FIG. It is preferable to protect FIG. 4 shows an embodiment in which such a protection member 33 is attached to the cable 15. This protection member 33 is shown in FIG. 5(a).
As shown in the figure, it is made of a cylindrical rubber-like elastic body with a body 33a at the center and flanges 33b at both ends. This protective member 33 is divided into two along a plane passing through its axis, and is shown in FIG.
It is attached to the cable in the form shown in (b). After installation, the two parts are integrated by adhesive or the like.

As shown in FIG. 3, a cable 15 is connected to the bottom surface of the panel 10 via a connector plug 20, and this cable 15 is connected just between the side wall portion 1b of the track 1 and the levitation coil 2. The wire extends horizontally into the space created between the wires and curves within the horizontal plane, so
There is no need to form pits as described in FIG. 6, and the cable 15 can be extended with a sufficiently large bending radius. Thereby, the durability against thermal expansion and contraction of the panel 3 due to repeated bending of the cable can be significantly improved.

The present invention is not limited to the above embodiments. In the above embodiment, the panel was explained as a rectangular panel attached to the inner surface of the track side wall portion, but any plate-shaped panel with individually molded propulsion coils may be used, whether disc-shaped or polygonal. There is no problem even if it has a shape like this. Furthermore, although the propulsion coil has been described as a connected element, it may be replaced with various other electric circuit elements.

[0021]

Effects of the Invention In the expandable/contractable absorbing jumper section of the present invention as described above, the cable is extended in a curved manner on a surface substantially perpendicular to the wall surface along which the panels are arranged, and within the long window of the saddle. Since the cable can be moved in parallel while in contact with the surface, it is possible to prevent fatigue of the cable due to wind pressure and vibration while allowing the cable to move due to thermal expansion and contraction of the panel.

[Brief explanation of drawings]

FIG. 1 is a plan view of an embodiment of a stretchable absorbent jumper section of the present invention.

FIG. 2 is a front view of FIG. 1.

FIG. 3 is a cross-sectional view of a linear motor car track employing the expandable absorbing jumper section of the present invention.

FIG. 4 is a plan view of a saddle and a cable protection member suitable for implementing the present invention.

FIG. 5(a) is a side view of the cable protection member, and FIG. 5(b) is a front view thereof.

FIG. 6 is a cross-sectional view of a track of a conventional linear motor car.

FIG. 7 is a front view showing an example of a conventional elastic absorbent jumper section.

[Explanation of symbols]

10 Panel 11 Coil (connected element) 15 Cable 20 Connector plug 30 Saddle 30b long window

Claims (1)

[Claims] 1. A plurality of panels in which connected elements are integrated and arranged along a predetermined wall surface, a cable that spans between the panels and electrically connects the connected elements, and the predetermined panel. The cable is curved on a plane substantially perpendicular to the wall of the building, and the cable is provided with a saddle that fixes the cable on the plane while forming a long window that can be moved in parallel while being in contact with the plane. Stretchable absorbent jumper section.