JP2018034565A - Tightening device and power feeding system provided with the same - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a tightening device the width dimension of which can be reduced: and to provide a power feeding system provided with the device.SOLUTION: A tightening device 3 includes a body 31, a pair of first terminals 33, 34, a pair of second terminals 35, 36 and a tension generation part 37. The body 31 includes a front face 311 and a rear face 312 on both sides in a cross direction. The tension generation part 37 includes a fixation part 372 fixed to the body 31 at its one end part in a lateral direction. A storage recessed part 313 storing the pair of first terminals 33, 34 and the pair of second terminals 35, 36 is formed on the front face 311. A holding recessed part 317 storing the fixation part 372 is formed on the rear face 312.SELECTED DRAWING: Figure 8

Description

  The present invention generally relates to a tightening device and a power supply system including the same, and more particularly to a tightening device that applies tension to a power supply path and a power supply system including the same.

  Patent Document 1 discloses a current collector that transmits electric power from a feeding path to a mobile device such as a crane. This current collector includes a current collecting arm and a fixing member. The current collecting arm includes a current collecting arm and an arm. One end of the arm holds the current collector, and the end opposite to the current collector is held by the fixing member. The current collector is attached to the mobile device by fixing the fixing member to the mobile device.

  When the current collector moves together with the mobile device, the current collector moves while contacting the power supply path. As a result, current is collected from the power supply path to the current collector, and power in the power supply path is supplied to the mobile device via the current collector.

JP 2008-301577 A

  By the way, as a power supply path (insulated trolley wire) as described in Patent Document 1, a tension-type power supply path used in a state where tension is applied from both sides in the extension direction is known. The tension type power supply path is used in a state in which a tensioning device is disposed in at least one of the extension directions and a tension along the extension direction is applied to the power supply path from the tensioning device. In consideration of attaching this type of power supply path to a long attachment object such as a duct rail, it is desirable to suppress not only the width dimension of the power supply path itself but also the width dimension of the tightening device. .

  This invention is made | formed in view of the said reason, and it aims at providing the tensioning apparatus which can suppress a width dimension small, and an electric power feeding system provided with the same.

  A tightening device according to an aspect of the present invention is a tightening device that applies tension along the first direction to a power supply path having a pair of core wires extending in a first direction. The tightening device includes a main body, a pair of first terminals, a pair of second terminals, and a tension generator. The main body has electrical insulation. The pair of first terminals mechanically hold one end portion of the pair of core wires in the first direction and are electrically connected to the pair of core wires. The pair of second terminals are electrically connected to the pair of first terminals and are members for connecting electric wires. The tension generating portion projects from the main body in one of the first directions, and applies a tension in a direction to pull the main body to the opposite side of the pair of core wires along the first direction. The main body has a front surface and a back surface on both sides in a second direction orthogonal to the first direction. The tension generating part has a fixing part fixed to the main body at one end part in the first direction. An accommodation recess for accommodating the pair of first terminals and the pair of second terminals is formed on the surface. A holding recess for storing the fixed portion is formed on the back surface.

  A power supply system according to an aspect of the present invention includes the tightening device and the power supply path.

  Advantageous Effects of Invention According to the present invention, there is an advantage that a tightening device that can keep the width dimension small and a power supply system including the same can be provided.

FIG. 1 is a perspective view of a power feeding system according to an embodiment of the present invention. FIG. 2 is an exploded perspective view of the above power supply system. FIG. 3A is a cross-sectional view showing a state where the power supply path and the holding member of the power supply system are separated, and FIG. 3B is a cross-sectional view showing a state where the power supply path is attached to the holding member of the power supply system. . FIG. 4 is a partially broken perspective view of the power feeding system. FIG. 5 is a cross-sectional view of the power feeding path in the “coiled state” of the power feeding system of the above. FIG. 6 is an exploded perspective view of the tightening device of the power feeding system as seen from the upper left front. FIG. 7 is an exploded perspective view of the same tightening device as viewed from the upper left rear. FIG. 8A is a front view of the same tightening device with the lid removed, and FIG. 8B is a rear view of the same tightening device. FIG. 9 is a cross-sectional view of the same tightening device.

(1) Outline As shown in FIGS. 1 and 2, the power supply system 10 according to the present embodiment includes a power supply path 1, a holding member 2, and a tightening device 3. Moreover, in the example of FIG.1 and FIG.2, the electric power feeding system 10 is further provided with the duct rail 4 as an attachment target object. However, the electric power feeding system 10 does not need to include the attachment target object (duct rail 4) in a component. Furthermore, the power feeding system 10 only needs to include at least the power feeding path 1 as a component, and may not include the holding member 2 or the tightening device 3 as a component. That is, the power feeding system 10 may be configured by the power feeding path 1 and the holding member 2, or may be configured by the power feeding path 1 and the tightening device 3.

  The power supply system 10 is a so-called insulating trolley used for power supply to a mobile device moving in the facility, for example, in a facility such as an automatic warehouse or a factory. As an example of the mobile device, there is an electric cart that transports articles in a facility and puts articles in and out of shelves. The mobile device operates by receiving power supply from the power supply system 10. Specifically, the power feeding path 1 includes a conducting wire member 11 composed of at least one core wire 111 and 112 electrically connected to a power source. The mobile device includes a current collector 5 (see FIG. 1) having a current collector. The current collector 5 moves along the extending direction of the conductor member 11 in a state where the collector is in contact with the conductor member 11. Thereby, the mobile device can move (run) along the extending direction of the conducting wire member 11 while receiving power from the power feeding path 1 in the current collector 5. In FIG. 1, the schematic shape of the current collector 5 is indicated by an imaginary line (two-dot chain line).

  In the present embodiment, a DC power supply system 10 that supplies power to a mobile device that has a DC motor and operates by receiving supply of DC power will be described as an example. In order to supply DC power to the current collector 5, the power supply system 10 employs a conductive wire member 11 including a pair of (two) core wires 111 and 112 of a positive electrode and a negative electrode as the conductive wire member 11 of the power supply path 1. ing. Here, it is assumed that the mobile device is a so-called light load device with relatively small power consumption, and the allowable current of the power supply path 1 is relatively small.

  The power feeding path 1 is attached to an attachment object (here, the duct rail 4) via the holding member 2. In this embodiment, as an example, it is assumed that power is supplied to a moving device that moves in the horizontal direction, and the power supply path 1 is attached to a duct rail 4 that is installed along the horizontal direction. Hereinafter, in a state in which the power feeding path 1 is attached to the duct rail 4, a direction perpendicular (orthogonal) to the horizontal plane is referred to as “up / down direction”, and a lower direction (vertical direction) is referred to as “downward”. In addition, the direction orthogonal to the vertical direction, in which the feeding path 1 and the current collector 5 face each other, is referred to as “front-rear direction”, and the current collecting apparatus 5 side as viewed from the feeding path 1 is referred to as “front”. . Further, the longitudinal direction of the duct rail 4, that is, the moving direction of the moving device will be described as “left-right direction”, the right side when viewed from the front of the power feeding path 1 will be described as “right”, and the left side will be described as “left”. The arrows indicating “vertical direction”, “front / rear direction”, and “left / right direction” in the drawings are merely shown for the purpose of explanation, and are not accompanied by an entity. However, these directions are not intended to limit the use direction (mounting direction) of the power feeding path 1.

  By the way, there are two types of power supply path 1, a tension type and a connection type (non-tension type). The tension type power supply path 1 is used in a state where tension is applied to the conductor member 11 from both sides in the extending direction (left and right direction) of the conductor member 11. The tension on the conductor member 11 is generated by the tightening device 3. The tightening device 3 may be provided only on one side in the extending direction of the conducting wire member 11 with respect to the power supply path 1, or may be provided on both sides in the extending direction of the conducting wire member 11.

  In the case of the tension type power supply path 1, a necessary length is cut from the sufficiently long power supply path 1 and used. Therefore, in the tension type power supply path 1, the power supply path 1 having a sufficient length (for example, 50 [m]) is wound in an annular shape having a radius of about several tens [cm] (hereinafter referred to as “coiled state”). Is also carried to the construction site (facility). On the other hand, the connection type power supply path 1 is used in a state where a plurality of power supply paths 1 are connected in the extending direction (first direction) of the conductor member 11 without applying tension to the conductor member 11. In the case of the connection type power supply path 1, a necessary number of power supply paths 1 having a predetermined length (for example, 3 [m]) are connected and used when the power supply path 1 is installed in the facility. Therefore, in the connection type power supply path 1, it is carried into the construction site (facility) in a state where a plurality of power supply paths 1 are overlapped (hereinafter also referred to as “laminated state”).

  Comparing the tension type and the connection type, the tension type power supply path 1 can seamlessly realize a relatively long power supply path, and it is not necessary to connect a plurality of power supply paths 1 during construction. There is an advantage that labor can be saved. Further, with respect to the installation interval of the holding member 2 that holds the power supply path 1, the tension type power supply path 1 can be wider than the connection type power supply path 1. That is, since the tension type power supply path 1 is installed in a state where the bending of the power supply path 1 is suppressed by the tension, even if the installation interval of the holding members 2 is wide, the tension type power supply path 1 is bent similarly to the connection type power supply path 1. Can be realized. For example, when the installation interval of the holding members 2 in the connection type is 50 [cm], the installation interval of the holding members 2 in the tension type can be expanded to about 2 [m]. Therefore, the tension-type power supply path 1 can reduce the labor of construction for installing the holding member 2. On the other hand, if it is a connection type electric supply path 1, since it is not necessary to apply tension with respect to the conducting wire member 11, the tightening device 3 becomes unnecessary.

  In the present embodiment, a case where the feeding path 1 is a tension type will be described as an example.

(2) Details Hereinafter, details of each part of power feeding system 10 concerning this embodiment are explained.

(2.1) Attachment object In this embodiment, an attachment object consists of the elongate duct rail 4 extended in the left-right direction, as shown in FIG.1 and FIG.2. The duct rail 4 is made of metal, for example. For example, the duct rail 4 is installed between a pair of support columns installed at a predetermined interval in the left-right direction.

  The duct rail 4 includes a rear wall 41 arranged along a plane orthogonal to the front-rear direction, an upper wall 42 that protrudes forward from the upper edge of the rear wall 41, and a lower wall that protrudes forward from the lower edge of the rear wall 41. A wall 43 and a front wall 44 protruding downward from the front edge of the upper wall 42 are provided. Here, the rear wall 41, the upper wall 42, the lower wall 43, and the front wall 44 are integrally formed. In other words, the rear wall 41, the upper wall 42, the lower wall 43, and the front wall 44 are made of a single metal plate. Further, the duct rail 4 has an opening 45 between the lower end edge of the front wall 44 and the front end edge of the lower wall 43. The opening 45 is formed over the entire length of the duct rail 4 in the left-right direction. A screw hole 411 for fixing the holding member 2 is formed in the rear wall 41 of the duct rail 4.

  With respect to such a duct rail 4, the power feeding path 1 is attached to the front surface of the rear wall 41 by the holding member 2. In a state where the power feeding path 1 is attached to the duct rail 4, the power feeding path 1 is stored in a space surrounded by the rear wall 41, the upper wall 42, the lower wall 43, and the front wall 44 as shown in FIG. 1. The feeding path 1 is exposed forward through the opening 45. By using the duct rail 4, the holding member 2 can be installed at a desired interval even without a structure such as a wall or a ceiling, and the feeding path 1 can be installed. The duct rail 4 also has a function of protecting the power feeding path 1 by surrounding the power feeding path 1.

(2.2) Feeding path As shown in FIGS. 3A, 3B, and 4, the feeding path 1 includes a conductive wire member 11 and a covering member 12.

  The conducting wire member 11 includes at least one core wire 111,112. In the present embodiment, since the power feeding path 1 supplies DC power as described above, the conductive wire member 11 is configured by a pair (two) of core wires 111 and 112 of a positive electrode and a negative electrode.

  Each of the core wires 111 and 112 is a long member having electrical conductivity and extending in the first direction. That is, the extension direction of the cores 111 and 112 is set as the “first direction”. In the present embodiment, as an example, the core wires 111 and 112 are made of metal such as copper or copper alloy, and are rectangular wires whose cross-sectional shape orthogonal to the extending direction (first direction) is rectangular. Hereinafter, among the directions orthogonal to the first direction, the short direction of the cross section of each of the core wires 111 and 112 is referred to as a “second direction”, and the longitudinal direction of the cross section of each of the core wires 111 and 112 is “third direction”. And In other words, the second direction is the thickness direction of the cores 111 and 112, and the third direction is the width direction of the cores 111 and 112. In the present embodiment, the left-right direction is the “first direction”, the front-rear direction is the “second direction”, and the up-down direction is the “third direction”.

  The covering member 12 has an electrical insulation property and is a long member that covers the conductor member 11. That is, the covering member 12 is a long member that extends in the first direction (left-right direction) similarly to the conductor member 11. In the present embodiment, as an example, the covering member 12 is made of a synthetic resin such as hard vinyl chloride. The covering member 12 has a first surface 121 (front surface) and a second surface 122 (rear surface) on both sides in the front-rear direction orthogonal to the left-right direction. On the first surface 121 of the covering member 12, an opening portion 123 opened forward is formed along the left-right direction, and the conducting wire member 11 is accommodated in the opening portion 123. Here, the open part 123 is formed over the entire length of the covering member 12 in the left-right direction. Thereby, the conducting wire member 11 is exposed forward through the opening of the opening portion 123. In other words, the covering member 12 covers the conducting wire member 11 so that the conducting wire member 11 is exposed through the opening of the opening portion 123.

  In this embodiment, since the conducting wire member 11 is composed of a pair of core wires 111 and 112, the covering member 12 is also formed with a pair of open portions 123 so as to correspond to the pair of core wires 111 and 112. The pair of open portions 123 are formed side by side with a predetermined interval in the vertical direction perpendicular to both the left-right direction and the front-rear direction. That is, the pair of core wires 111 and 112 housed in the pair of open portions 123 are arranged side by side in the vertical direction. Thereby, by collecting the current collector 5 from the front with respect to the power supply path 1, the current collector of the current collector 5 can be brought into contact with the conductive wire member 11 in the open portion 123. 11) can supply power to the current collector 5.

  More specifically, the covering member 12 has side walls 124 that protrude forward from the first surface 121 on both sides of each open portion 123 in the vertical direction. The first surface 121 is formed such that a pair of (two) side walls 124 opposed in the vertical direction constitute one set, and two sets (a total of four) side walls 124 are arranged in the vertical direction. The side wall 124 is formed over the entire length of the covering member 12 in the left-right direction. Thereby, the open part 123 is formed between a pair of side walls 124 of each group. The width dimension (vertical dimension) of each open portion 123 is enlarged at the rear end of each open portion 123, that is, at the bottom. The width dimension of the rear end part of each open part 123 is substantially the same as the width dimension of each core wire 111, 112. The distance between the pair of side walls 124 is set smaller than the width dimension of each of the core wires 111 and 112. The pair of core wires 111 and 112 are housed in the rear end portions of the pair of open portions 123. As a result, the core wires 111 and 112 are exposed from between the pair of side walls 124, and the current collector of the current collector 5 comes into contact with the conductor member 11 through the pair of side walls 124. Furthermore, in the present embodiment, the surface on the open portion 123 side of each side wall 124 is formed in a tapered shape so that the distance between the pair of side walls 124 becomes wider toward the opening side (front) of the open portion 123.

  The covering member 12 has a pair of peripheral ribs 125 protruding rearward from both ends of the second surface 122 in the vertical direction. The peripheral rib 125 is formed over the entire length of the covering member 12 in the left-right direction. The protruding dimension of the peripheral rib 125 is sufficiently smaller than the protruding dimension of the side wall 124. The pair of peripheral ribs 125 has a function of preventing the winding deviation of the power feeding path 1 in the “coiled state” as described above. That is, when the power feeding path 1 is in the “coiled state”, as shown in FIG. 5, the side wall 124 of the power feeding path 1 on the inner side (rear) in the overlapping direction is positioned between the pair of peripheral ribs 125. The positional deviation (winding deviation) in the vertical direction of the wound power feeding path 1 is less likely to occur. In the case of the connection type power supply path 1, the pair of peripheral ribs 125 have a function of preventing the positional deviation in the vertical direction of the plurality of power supply paths 1 in the “laminated state” as described above.

  By the way, as shown to FIG. 3A, FIG. 3B, and FIG. 4, the electric power feeding path 1 which concerns on this embodiment is the surface (namely, 2nd surface 122) on the opposite side to the opening part 123 of the front-back direction in the coating | coated member 12. To a held portion 13 that protrudes in the second direction. That is, the held portion 13 protrudes rearward from the second surface 122 of the covering member 12. The power feeding path 1 is attached to the attachment object (duct rail 4) via the holding member 2 when the held portion 13 is held by the holding member 2.

  The held portion 13 is held by the holding member 2 from both sides in the up-down direction orthogonal to both the left-right direction and the front-rear direction. Here, the held portion 13 is held by the holding member 2 by being sandwiched between the pair of sandwiching pieces 21 and 22 in the holding member 2 from both sides in the vertical direction. The held portion 13 is formed over the entire length of the covering member 12 in the left-right direction. Thereby, the holding member 2 can hold the power feeding path 1 at an arbitrary position in the left-right direction of the covering member 12. Details of the holding member 2 will be described in the section “(2.3) Holding member”.

  The held portion 13 has a pair of protrusions 131 and 132 that face each other with a gap in the vertical direction. The upper protruding piece 131 of the pair of protruding pieces 131 and 132 includes a first piece 131a protruding rearward from the second surface 122, and a second protruding upward from the front end (rear end) of the first piece 131a. And a piece 131b. Similarly, the lower projecting piece 132 of the pair of projecting pieces 131 and 132 has a first piece 132a that protrudes rearward from the second surface 122 and a lower end from the front end (rear end) of the first piece 132a. And a protruding second piece 132b. The second pieces 131b and 132b protrude in directions away from the tip portions of the first pieces 131a and 132a. Here, the corners between the first pieces 131a and 132a and the second pieces 131b and 132b are curved with a predetermined radius of curvature. The held portion 13 is held by the holding member 2 such that the pair of protruding pieces 131 and 132 are held by the pair of sandwiching pieces 21 and 22 from both sides in the vertical direction. In this state, when the claws 21b and 22b (see FIG. 3A) of the sandwiching pieces 21 and 22 are caught by the second pieces 131b and 132b, the forward movement of the held portion 13 relative to the holding member 2 is restricted, and the holding member The dropout of the power supply path 1 from 2 is prevented.

  Here, both end surfaces in the vertical direction of the held portion 13 (tip surfaces of the second pieces 131b and 132b) are positioned inside the vertical end surfaces (the upper surface 126 and the lower surface 127) of the covering member 12 in the vertical direction. To do. In other words, the tip end surface (upper surface) of the second piece 131 b of the upper protruding piece 131 among the pair of protruding pieces 131 and 132 is positioned below the upper surface 126 of the covering member 12. The front end surface (lower surface) of the second piece 132 b of the lower protruding piece 132 of the pair of protruding pieces 131 and 132 is positioned above the lower surface 127 of the covering member 12. In the present embodiment, as shown in FIG. 3A, both end surfaces in the vertical direction of the held portion 13 (tip surfaces of the second pieces 131b and 132b) are both end surfaces in the vertical direction of the covering member 12 in the vertical direction. It is in a position retracted from the (upper surface 126 and lower surface 127) by a predetermined dimension L1. That is, the vertical dimension of the held portion 13 is smaller by “2 × L1” than the vertical dimension of the covering member 12.

  In the present embodiment, the held portion 13 is integrally formed of the same material as the covering member 12. Therefore, the held portion 13 also functions as a reinforcing rib that increases the rigidity of the covering member 12. However, the front-end | tip part (rear end part) of a pair of protrusion 131,132 in the to-be-held part 13 is mutually isolate | separated so that it may oppose through a predetermined clearance gap. Therefore, compared to a configuration in which the tip portions of the pair of protruding pieces 131 and 132 are connected to each other, the rigidity of the held portion 13 itself is lowered. Therefore, the held portion 13 can impart appropriate rigidity to the covering member 12, and the power supply path 1 as a whole achieves a certain degree of difficulty in bending, but the above-described “coiled state”. Can be easily transformed.

  Moreover, if the front end portions (rear end portions) of the pair of projecting pieces 131 and 132 in the held portion 13 are separated via a gap, the power supply path 1 is in the “coiled state”, and FIG. As shown, the pair of projecting pieces 131 and 132 are housed in the pair of open portions 123, respectively. Therefore, in the “coiling state”, the dimension of the feeding path 1 in the overlapping direction (radial direction) can be kept small. Similarly, if the connection type power supply path 1 is used, the dimension in the stacking direction (front-rear direction) of the plurality of power supply paths 1 in the “laminated state” as described above can be reduced.

  In addition, the covering member 12 has a support surface 128 that is abutted against a part of the holding member 2 in the front-rear direction on at least a part of the second surface 122 between the pair of protruding pieces 131 and 132. In the present embodiment, in a state where the feeding path 1 is held by the holding member 2, the support base 23 (see FIG. 3B) in the holding member 2 is abutted against the support surface 128. That is, a portion of the second surface 122 of the covering member 12 that is between the pair of protruding pieces 131 and 132 and faces the support base 23 in the front-rear direction functions as the support surface 128. Therefore, in a state where the power feeding path 1 is held by the holding member 2, the support base 23 supports the support surface 128 of the covering member 12 from the rear, so that the rearward bending of the power feeding path 1 is suppressed.

  Furthermore, a guide groove 129 extending in the left-right direction is formed on the support surface 128. In other words, the dimension of the guide groove 129 in the vertical direction is set smaller than the dimension of the support base 23 in the vertical direction. Therefore, on both sides of the guide groove 129 in the vertical direction, the support surfaces 128 for the support base 23 to contact are located. The guide groove 129 is inserted into the guide protrusion 24 (see FIG. 3B) that protrudes from the front end surface (front end surface) of the support base 23 of the holding member 2, so that Positioning is performed. That is, when an external force along the vertical direction is applied to the power supply path 1, the guide protrusion 24 comes into contact with the inner surface of the guide groove 129, so that the power supply path 1 moves relative to the holding member 2 in the vertical direction. Be regulated. Therefore, the bending to the up-down direction of the electric power feeding path 1 is suppressed. In addition, when a lateral tension is applied to the power supply path 1 during construction of the power supply path 1, the guide protrusions 24 are formed in the guide groove 129 along the extension direction (left-right direction) of the guide groove 129. To move. Therefore, the movement of the power feeding path 1 relative to the holding member 2 is restricted in the vertical direction while allowing the movement of the power feeding path 1 relative to the holding member 2 in the left / right direction. Here, the support surface 128 and the guide groove 129 are formed over the entire length of the covering member 12 in the left-right direction.

(2.3) Holding Member As shown in FIG. 4, the holding member 2 includes a base portion 25, a pair of sandwiching pieces 21 and 22, a support base 23, a guide protrusion 24, a pair of attachment pieces 26, and a pair. Hooking portions 27 and 28. The holding member 2 is a member for attaching the power feeding path 1 to an attachment object (duct rail 4). The holding member 2 has electrical insulation. Here, the holding member 2 is made of synthetic resin, and the base 25, the pair of sandwiching pieces 21 and 22, the support base 23, the guide protrusion 24, the pair of attachment pieces 26, and the pair of hooking portions 27 and 28 are integrally formed. Is formed.

  The base 25 is formed in a plate shape having a substantially square shape when viewed from the front. The pair of attachment pieces 26 protrudes from both left and right end surfaces of the base portion 25 to both sides in the left and right direction. Each attachment piece 26 is formed with a long hole 261 that penetrates each attachment piece 26 in the front-rear direction. The holding member 2 is fixed to the rear wall 41 of the duct rail 4 by tightening the mounting screw to the screw hole 411 of the duct rail 4 through the long hole 261.

  The pair of sandwiching pieces 21 and 22 protrude forward from both ends in the vertical direction on the front surface of the base portion 25. The upper clip piece 21 of the pair of clip pieces 21 and 22 includes a main piece 21a that protrudes forward from the front surface of the base portion 25, and a claw 21b that protrudes downward from the front end portion (front end portion) of the main piece 21a. Have. Similarly, the lower sandwiching piece 22 of the pair of sandwiching pieces 21 and 22 includes a main piece 22a projecting forward from the front surface of the base 25, and a claw projecting upward from the tip (front end) of the main piece 22a. 22b. The front end surfaces of the claws 21b and 22b are tapered so that the distance between the pair of claws 21b and 22b increases toward the front. Here, the projecting dimension of the pair of sandwiching pieces 21 and 22 from the base 25 is larger than the projecting dimension of at least the pair of projecting pieces 131 and 132 from the covering member 12.

  In addition, the vertical dimension (thickness dimension) of the main pieces 21a and 22a in each sandwich piece 21 and 22 is set to be smaller than the predetermined dimension L1 described above. In particular, in the present embodiment, the upper and lower end surfaces of the pair of sandwiching pieces 21 and 22 are positioned inside the upper and lower end surfaces (upper surface 126 and lower surface 127) of the covering member 12 in the vertical direction. The dimensions of each part are set. Therefore, the pair of sandwich pieces 21 and 22 are hidden by the covering member 12 without protruding from the covering member 12 in a front view. Accordingly, the dimension (width dimension) of the holding member 2 in the vertical direction can be reduced compared to a configuration in which the pair of sandwiching pieces 21 and 22 sandwich the covering member 12 itself rather than the held portion 13 from both sides in the vertical direction. .

  The support base 23 protrudes forward from the center in the vertical direction on the front surface of the base 25. That is, the support base 23 is disposed between the pair of protruding pieces 131 and 132. The projecting dimension from the base 25 of the support base 23 is slightly larger than the projecting dimension from the base 25 of the pair of sandwich pieces 21 and 22. The guide protrusion 24 protrudes from the front end surface (front end surface) of the support base 23. The guide protrusion 24 is inserted into the guide groove 129 of the covering member 12 as described above, thereby performing relative positioning between the holding member 2 and the power feeding path 1 in the vertical direction.

  The pair of hook portions 27 and 28 protrude from the pair of sandwiching pieces 21 and 22 to the opposite side to the held portion 13 in the vertical direction. At least a part of the pair of hook portions 27 and 28 is positioned outside the both end surfaces (upper surface 126 and lower surface 127) of the covering member 12 in the vertical direction. In the present embodiment, the upper hooking portion 27 of the pair of hooking portions 27, 28 is a first protrusion 27 a that protrudes upward from the upper surface of the sandwiching piece 21, and a front end from the tip (upper end) of the first protrusion 27 a. And a second protrusion 27b that protrudes toward the center. Similarly, the lower hooking portion 28 of the pair of hooking portions 27, 28 includes a first protrusion 28 a that protrudes downward from the lower surface of the clip piece 22, and a front end portion (lower end portion) of the first protrusion 28 a. And a protruding second protrusion 28b.

  Here, the lower surface of the second protrusion 27 b of the upper hook portion 27 of the pair of hook portions 27 and 28 is located above the upper surface 126 of the covering member 12. The upper surface of the second protrusion 28 b of the lower hooking portion 28 of the pair of hooking portions 27, 28 is positioned below the lower surface 127 of the covering member 12. In the present embodiment, as shown in FIG. 3B, the opposing surfaces in the vertical direction of the pair of second protrusions 27b and 28b are both end surfaces (upper surface 126 and lower surface 127) in the vertical direction of the covering member 12 in the vertical direction. It is in a position protruding by a predetermined dimension L2 from the outside. As a result, in the vertical direction, between the upper surface 126 of the covering member 12 and the second protrusion 27b of the hooking portion 27 and between the lower surface 127 of the covering member 12 and the second protrusion 28b of the hooking portion 28, both A gap of “L2” is generated.

  Next, a procedure for attaching / detaching the power feeding path 1 to / from the holding member 2 having the above-described configuration will be described with reference to FIGS. 3A and 3B.

  First, when attaching the power feeding path 1 to the holding member 2, the operator presses the power feeding path 1 from the front of the holding member 2. Thus, in the holding member 2, the claws 21b and 22b get over the second pieces 131b and 132b while the pair of sandwiching pieces 21 and 22 bend in a direction away from each other, and as shown in FIG. 3B, the pair of sandwiching pieces 21 , 22 sandwiches the held portion 13. In this state, the front end surfaces (front end surfaces) of the pair of sandwiching pieces 21 and 22 do not contact the second surface 122 of the covering member 12, and the front end surface (front end surface) of the support base 23 is the second surface of the covering member 12. 122 (support surface 128) is contacted. At this time, the holding member 2 brings the support base 23 into contact with the covering member 12 from the rear, and makes the claws 21b and 22b come into contact with the second pieces 131b and 132b from the front. Is restricted, and the power feeding path 1 is held by the holding member 2.

  On the other hand, when removing the power feeding path 1 from the holding member 2, the operator pulls the power feeding path 1 forward while releasing the hooks of the claws 21b and 22b from the second pieces 131b and 132b. At this time, since the pair of sandwich pieces 21 and 22 are hidden behind the covering member 12 in a front view, the operator bends the pair of sandwich pieces 21 and 22 using the pair of hook portions 27 and 28. Thus, the hooks of the claws 21b and 22b with respect to the second pieces 131b and 132b are released. Specifically, the operator inserts a jig such as a minus driver into the gap between the upper surface 126 of the covering member 12 and the second protrusion 27b of the hook portion 27, and uses the lever principle to The hook part 27 is moved upward. Thereby, the pinching piece 21 is bent upward together with the hooking portion 27, and the hook of the claw 21b with respect to the second piece 131b is released. Similarly, when the hooking portion 28 is used, the catching piece 22 and the hooking piece 28 bend downward so that the hook of the claw 22b with respect to the second piece 132b is released.

  Although only one holding member 2 is shown in FIGS. 1 and 2, etc., a plurality of holding members 2 are actually installed at a desired interval (for example, 2 [m] interval). The power feeding path 1 is attached to the duct rail 4 via the holding member 2 by being held by the plurality of holding members 2. In other words, the power supply path 1 is installed between the plurality of holding members 2 so as to be separated from the rear wall 41 of the duct rail 4. In this state, the bending of the power feeding path 1 in the front-rear direction is suppressed by the rigidity of the power feeding path 1 itself and the tension acting on the power feeding path 1.

(2.4) Tightening device As shown in FIGS. 6 and 7, the tightening device 3 includes a main body 31, a lid body 32, a pair of first terminals 33 and 34, and a pair of second terminals 35 and 36. , A tension generator 37. The tightening device 3 is a device that applies a lateral tension to the conductor member 11 of the power supply path 1. That is, the tightening device 3 applies a force (tension) in a direction of pulling from both sides in the extending direction (left-right direction) of the conductor member 11 to the conductor member 11.

  The pair of first terminals 33 and 34 mechanically hold one end in the left-right direction of the pair of core wires 111 and 112 and are electrically connected to the pair of core wires 111 and 112. In the present embodiment, each of the first terminals 33 and 34 is a screw-type terminal, and the fastening screws 331 and 341 are inserted in a state where the core wires 111 and 112 are inserted into a metal plate formed in a rectangular tube shape. By being tightened, the cores 111 and 112 are connected. Here, two tightening screws 331 and 341 are used for each of the first terminals 33 and 34, and the pair of first terminals 33 and 34 firmly hold the pair of core wires 111 and 112. To do. Further, each of the tightening screws 331 and 341 is a screw with an overload protection function (torque limiter), and is configured such that the head is bent when tightened with a torque equal to or higher than a specified torque.

  The pair of second terminals 35 and 36 are electrically connected to the pair of first terminals 33 and 34. The pair of second terminals 35 and 36 are terminals for connecting the electric wire 38. The electric wire 38 here is a two-wire (two-core type) electric wire corresponding to the pair of second terminals 35 and 36. In the present embodiment, the second terminals 35 and 36 are screw terminals, and are mechanically and electrically connected to the electric wire 38 by tightening the terminal screws 351 and 361. The electric wires 38 connected to the pair of second terminals 35 and 36 are connected to a power source. Accordingly, the pair of core wires 111 and 112 are electrically connected to the power source via the pair of first terminals 33 and 34, the pair of second terminals 35 and 36, and the electric wire 38. Here, one first terminal 33 and one second terminal 35 are integrally formed of a single metal plate. Similarly, the other first terminal 34 and the other second terminal 36 are integrally formed of a single metal plate.

  Both the main body 31 and the lid body 32 have electrical insulation. Here, both the main body 31 and the lid body 32 are made of synthetic resin. The main body 31 has a front surface 311 (front surface) and a back surface 312 (rear surface) on both sides in the front-rear direction orthogonal to the left-right direction. The lid body 32 is attached to the front surface 311 side of the main body 31, and the main body 31 and the lid body 32 are stored in the duct rail 4 with the back surface 312 of the main body 31 in contact with the front surface of the rear wall 41 of the duct rail 4. Is done. The main body 31 functions as an insulator for ensuring electrical insulation between the conductor member 11 and the electric wire 38, and the duct rail 4 and the tension generating portion 37.

  A housing recess 313 for housing the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 is formed on the surface 311 of the main body 31. The lid 32 is attached to the main body 31 so as to cover the storage recess 313. That is, on the front surface 311 side (front side) of the main body 31 in the front-rear direction, the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 are provided between the main body 31 and the lid body 32 by the storage recess 313. A space for storing the is formed.

  The main body 31 further includes a partition wall 314 that divides the internal space of the storage recess 313 into two in the vertical direction. The first terminal 33 and the second terminal 35 are stored in a space above the partition wall 314 in the internal space of the storage recess 313. The first terminal 34 and the second terminal 36 are housed in the space below the partition wall 314 in the internal space of the housing recess 313.

  A pair of terminal holes 315 penetrating the main body 31 in the left-right direction is formed on the right side surface of the housing recess 313. The pair of terminal holes 315 are holes through which the pair of core wires 111 and 112 as the conducting wire member 11 are passed. The pair of terminal holes 315 are provided separately above and below the partition wall 314. As a result, the one core wire 111 is introduced from the right side of the main body 31 through the one terminal hole 315 into the space above the partition wall 314 in the internal space of the storage recess 313. The other core wire 112 is introduced from the right side of the main body 31 into the space below the partition wall 314 in the internal space of the housing recess 313 through the other terminal hole 315. One core 111 is connected to one first terminal 33 in the housing recess 313, and the other core 112 is connected to the other first terminal 34 in the housing recess 313.

  Here, the pair of terminal holes 315 are formed in a size and shape that the pair of first terminals 33 and 34 cannot penetrate. Therefore, the pair of first terminals 33 and 34 are held by the main body 31 in a state of being housed in the housing recess 313, and a rightward force acts on the pair of first terminals 33 and 34 from the pair of core wires 111 and 112. Even so, the pair of first terminals 33 and 34 stops in the housing recess 313.

  Further, a groove 316 is formed on the surface 311 of the main body 31 for passing the electric wire 38 connected to the pair of second terminals 35 and 36. The groove 316 is connected to the storage recess 313 and extends leftward from the storage recess 313.

  In addition, a holding recess 317 that houses the fixing portion 372 of the tension generating portion 37 is formed on the back surface 312 of the main body 31. Although the fixing part 372 will be described in detail later, in this embodiment, the fixing part 372 has a first nut 372a. That is, on the back surface 312 side (rear side) of the main body 31 in the front-rear direction, a space for accommodating the fixing portion 372 including the first nut 372a is formed by the holding recess 317.

  A through hole 318 that penetrates the main body 31 in the left-right direction is formed on the left side surface of the holding recess 317. The through hole 318 is a hole through which the main shaft 371 of the tension generator 37 passes. Although details of the main shaft 371 will be described later, in the present embodiment, the main shaft 371 is a full screw (dimension bolt). Thereby, the main shaft 371 is introduced into the holding recess 317 from the left side of the main body 31 through the through hole 318. The right end portion of the main shaft 371 is coupled to the fixing portion 372 (first nut 372a) in the holding recess 317.

  Here, the through hole 318 is formed in a size and shape that the fixing portion 372 cannot penetrate. Therefore, the fixing portion 372 is held in the main body 31 in a state of being accommodated in the holding recess 317, and even if a leftward force acts on the fixing portion 372 from the main shaft 371, the fixing portion 372 stops in the holding recess 317. become.

  The lid body 32 has a main plate 321 that covers the storage recess 313 and a hook piece 322 that protrudes from the right end edge of the main plate 321. In a state where the hooking piece 322 is hooked on the hooking frame 319 provided at the right end of the surface 311 of the main body 31, the left end of the main plate 321 is attached to the main body 31 using a pair of assembly screws 391 and a pair of assembly nuts 392. Screwed. Thereby, the lid body 32 is attached to the main body 31. A pair of through holes 323 for passing a pair of assembly screws 391 are formed at the left end of the main plate 321.

  In addition, a pair of partition walls 324 (see FIG. 7) facing in the vertical direction and a through groove 325 for passing the electric wires 38 are formed on the surface (rear surface) of the lid 32 facing the main body 31. Yes. In the state where the lid 32 is attached to the main body 31, the partition wall 314 is inserted between the pair of partition walls 324 (see FIG. 9). Thereby, the internal space of the storage recess 313 is reliably isolated in the vertical direction by the pair of partition walls 324 and the partition wall 314. The through groove 325 is formed between the pair of through holes 323 at the left end portion of the main plate 321 and at a position corresponding to the groove 316 formed on the surface 311 of the main body 31.

  Here, at least one of the main body 31 and the lid 32 has a restriction piece 326 that restricts the movement of the electric wire 38 in the left-right direction by sandwiching the electric wire 38 connected to the pair of second terminals 35 and 36 (see FIG. 7). ). In the present embodiment, the restricting piece 326 is formed of a rib formed on the inner peripheral surface of the through groove 325 of the lid 32. In a state where the lid 32 is attached to the main body 31, the electric wire 38 passes through a space (hole) formed by the groove 316 and the communication groove 325 between the surface 311 of the main body 31 and the rear surface of the lid 32. It is pulled out from the storage recess 313. Therefore, when the regulating piece 326 formed on the inner peripheral surface of the through-groove 325 contacts the electric wire 38, the electric wire 38 is sandwiched between the regulating piece 326 and the surface 311 of the main body 31 (the bottom surface of the groove 316). As a result, the movement of the electric wire 38 in the left-right direction is restricted. That is, the restricting piece 326 functions as a tension stopper for the electric wire 38. In addition, in this embodiment, the lid body 32 is screwed to the main body 31 with a pair of assembly screws 391 through a pair of through holes 323 located on both sides of the through-groove 325 in the vertical direction. Therefore, by tightening the assembly screw 391, the restriction piece 326 can be bitten into the electric wire 38, and the electric wire 38 can be tightened more firmly.

  The tension generating unit 37 includes a main shaft 371, a fixing unit 372, a tightening unit 373, an adjusting unit 374 (see FIGS. 1 and 2), and a compression coil spring 375. In the present embodiment, the constituent elements of the tension generator 37 are all made of metal.

  The main shaft 371 is a male screw having a cylindrical shape and having a thread formed on the peripheral surface thereof. Here, the main shaft 371 is a full screw (dimension bolt) in which a thread is formed over the entire length in the longitudinal direction (left-right direction). The main shaft 371 is supported by the receiving bracket 6 (see FIGS. 1 and 2). The receiving metal fitting 6 consists of general-purpose metal fittings, such as L angle. The receiving metal 6 is fixed to the rear wall 41 of the duct rail 4, and the main shaft 371 is supported by the receiving metal 6 in a state of penetrating the receiving metal 6 in the left-right direction.

  The fixing portion 372 includes a first nut 372a and a flat washer 372b. The fixing portion 372 is housed in the holding recess 317 of the main body 31 and is attached to one end portion (right end portion) of the main shaft 371 in the longitudinal direction (left-right direction). In other words, the first nut 372 a functions as a stopper for removing the main shaft 371 from the main body 31. The tightening portion 373 includes a second nut 373a, a spring washer 373b, and a flat washer 373c. The tightening portion 373 is attached to the main shaft 371 at a position slightly inside (left side) of the fixing portion 372. The fastening portion 373 fixes the main shaft 371 to the main body 31 without rattling by sandwiching a part of the main body 31 (the left side wall of the holding recess 317) between the fastening portion 372 and the fastening portion 372.

  As shown in FIGS. 1 and 2, the adjustment unit 374 includes a double nut 374a and a flat washer 374b. The adjusting portion 374 is attached to an end portion (left end portion) opposite to the fixed portion 372 of both end portions of the main shaft 371 in the left-right direction. The compression coil spring 375 is combined with the main shaft 371 so that the main shaft 371 passes through the inside of the compression coil spring 375. The compression coil spring 375 is disposed between the receiving metal fitting 6 and the adjustment portion 374 in the left-right direction. A flat washer 376 is disposed between the compression coil spring 375 and the metal fitting 6.

  According to this configuration, by operating the adjusting unit 374 (double nut 374a) and moving the adjusting unit 374 in the left-right direction, the tension generating unit 37 acts on the pair of core wires 111 and 112 via the main body 31. The magnitude of the tension can be adjusted. That is, for example, when the adjusting unit 374 moves in a direction approaching the receiving metal fitting 6, the compression coil spring 375 is compressed between the adjusting unit 374 and the receiving metal fitting 6, and the adjusting unit 374 is caused to be elastic by the compression coil spring 375. A force in a direction away from the metal fitting 6 is received. At this time, the adjusting portion 374 receives a leftward force from the compression coil spring 375, and the main shaft 371 is pulled leftward together with the adjusting portion 374. Therefore, the tension (force that pulls the main body 31 leftward) acting on the main body 31 from the tension generating portion 37 increases. On the contrary, if the adjustment part 374 moves in the direction away from the metal fitting 6, the elastic force of the compression coil spring 375 is reduced, and the leftward force acting on the adjustment part 374 from the compression coil spring 371 is reduced. Therefore, the tension acting on the main body 31 from the tension generating portion 37 (force that pulls the main body 31 leftward) is reduced.

  8A and 8B, the storage recess 313 and the holding recess 317 are provided separately on the front surface 311 side (front) of the main body 31 and the back surface 312 side (rear) of the main body. The storage recess 313 formed on the front surface 311 of the main body 31 and the holding recess 317 formed on the back surface 312 of the main body 31 are not connected to each other by a hole or the like, and are physically connected to a part of the main body 31. It is isolated. Therefore, electrical insulation is ensured between the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 stored in the storage recess 313 and the fixing portion 372 stored in the holding recess 317. .

  Further, the tension generating unit 37 has a male screw and a female screw that are coupled to each other. In the present embodiment, the “male screw” is the main shaft 371, and the “female screw” is the fixing portion 372 (first nut 372a). Therefore, the fixed portion 372 is coupled to the main shaft 371 by rotating relative to the main shaft 371 around the central axis C1 (see FIG. 9) along the axial direction (left-right direction) of the main shaft 371. become. Here, as shown in FIG. 9, the inner surface of the holding recess 317 contacts the fixing portion 372 (first nut 372a), thereby rotating the fixing portion 372 (first nut 372a) around the central axis C1. A rotation restricting portion 317a to be restricted is configured. Specifically, the holding recess 317 is formed so that a cross section perpendicular to the left-right direction has a hexagonal shape opened rearward in accordance with the outer shape (hexagonal shape) of the first nut 372a. Thereby, in a state where the first nut 372a is housed in the holding recess 317, the inner surface of the holding recess 317 is in surface contact with the first nut 372a and functions as a rotation restricting portion 317a that restricts the rotation of the first nut 372a. To do.

  Therefore, when attaching the fixing portion 372 (first nut 372a) to the main shaft 371, the main shaft 371 may be rotated so as to be screwed into the fixing portion 372 in a state where the fixing portion 372 is housed in the holding recess 317. It is not necessary to stop the rotation of the fixing portion 372 using a jig.

  Further, the central axis C1 along the axial direction (left-right direction) of the main shaft 371 is substantially the same position as the center of the pair of core wires 111, 112 in the front-rear direction, and the pair of core wires 111, 112 in the vertical direction. Located in the middle. As a result, the tension acting on the main body 31 from the main shaft 371 acts on the pair of core wires 111 and 112 in a direction to be pulled straight to the left, and an unnecessary moment acts on the main body 31. Can be prevented.

  According to the tightening device 3 described above, the storage recess 313 for storing the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 is provided on the front surface 311 of the main body 31. A holding recess 317 for receiving the fixing portion 372 of the tension generating portion 37 is provided. In short, the storage recess 313 that stores the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 and the holding recess 317 that stores the fixing portion 372 of the tension generator 37 are arranged in the front-rear direction of the main body 31. It is provided separately on both sides. Therefore, in the tightening device 3, the tension generating unit 37, the sufficient amount of insulation distance between the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 are secured, The pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 can be arranged side by side in the front-rear direction. Therefore, in the tightening device 3, the width dimension (vertical dimension) of the main body 31 can be kept small.

  In addition, the tightening device 3 according to the present embodiment has only one tension generating portion 37 (the main shaft 371, the fixing portion 372, the tightening portion 373, the adjusting portion 374, and the compression coil spring 375). The dimensions of the device 3 can be kept small. That is, in a tightening device having a pair of tension generation units, a configuration in which a pair of tension generation units are connected to both ends in the vertical direction of the main body is common. Therefore, the vertical dimension of the main body 31 can be kept small.

  Further, in the tightening device 3 according to the present embodiment, the holding recess 317 that accommodates the fixing portion 372 of the tension generating portion 37 is provided on the back surface 312 of the main body 31, so that the lid is attached to the front surface 311 side of the main body 31. The body 32 can be screwed to the main body 31. That is, when the fixing portion 372 is housed on the back surface 312 side of the main body 31, the lid body 32 attached to the front surface 311 side of the main body 31 can be connected to the main body by a pair of assembly screws 391 without interfering with the fixing portion 372. 31 can be fixed.

(3) Modification The power feeding system 10 according to the above embodiment is merely an example of the present invention, and the present invention is not limited to the above embodiment, and the present invention is not limited to the above embodiment. Various modifications can be made according to the design or the like as long as the technical idea does not depart from the scope. Below, the modification of the said embodiment is enumerated.

  The mobile device that operates by receiving power supply from the power supply system 10 is not limited to an electric carriage, and may be, for example, a crane, a vehicle for carrying a person, or the like. In addition, the facility to which the power supply system is applied is not limited to an automatic warehouse or a factory, but may be, for example, an amusement facility or a store. Furthermore, the power feeding system 10 is not limited to being used indoors but may be used outdoors used outside the building.

  The power supply system 10 is not limited to supply of DC power, but may be used for supply of AC power such as a single-phase two-wire system, for example. Furthermore, the power feeding system 10 may be used for communication for transmitting a signal such as a control signal with a load (here, a mobile device), for example.

  Moreover, although the said embodiment demonstrated the case where the feed path 1 was extended in linear form, the feed path 1 may be extended along the curve. For example, when the moving path of a mobile device that receives power supply from the power feeding system 10 is a curved path, the power feeding path 1 is curved along the moving path. Even in such a case, the extension direction of the power supply path 1 is defined as a linear first direction by subdividing the power supply path 1 in the extension direction of the power supply path 1. That is, in the curved feeding path 1, the tangential direction at each part of the segmented feeding path 1 is the first direction.

  In addition, the cross-sectional shape orthogonal to the extending direction (first direction) of each core wire 111, 112 is not limited to a rectangular shape, and for example, a V-shaped or U-shaped groove is formed on the front surface of each core wire 111, 112. May be.

  Regarding the holding member 2, it is essential that both end surfaces in the vertical direction of the pair of sandwiching pieces 21, 22 are positioned inside the both end surfaces (upper surface 126 and lower surface 127) in the vertical direction of the covering member 12 in the vertical direction. It is not a configuration of. That is, at least one of the upper and lower end surfaces of the pair of sandwiching pieces 21 and 22 may be positioned outside the upper and lower end surfaces (upper surface 126 and lower surface 127) of the covering member 12 in the vertical direction. In this case, at least one of the pair of sandwiching pieces 21 and 22 protrudes from the covering member 12 in a front view. Even in this case, the dimension (width dimension) of the holding member 2 in the vertical direction is greater than the configuration in which the pair of sandwiching pieces 21 and 22 sandwich the covering member 12 itself from both sides in the vertical direction instead of the held portion 13. Can be kept small.

  In the above embodiment, the guide groove 129 is formed on the support surface 128 of the power supply path 1 and the guide protrusion 24 is formed on the holding member 2. However, the concave-convex relationship between the guide groove 129 and the guide protrusion 24 is reversed. There may be. That is, a guide groove may be formed in the holding member 2, and a guide protrusion inserted into the guide groove may be formed on the support surface 128 of the power feeding path 1.

  Further, the tightening device 3 is not limited to the configuration described in the above embodiment, and can be changed as appropriate. For example, in the tension generator 37, the plain washer and the spring washer are not essential components, and the plain washer and the spring washer can be omitted as appropriate. Further, the adjustment unit 374 may be a single nut instead of a double nut. Furthermore, the tension generator 37 is not limited to the configuration in which the tension is applied to the conductor member 11 by the elastic force of the compression coil spring 375, and the tension may be applied to the conductor member 11 by other methods. For example, the tightening device 3 may have a plurality of tension generating units 37. Furthermore, the pair of second terminals 35 and 36 may be electrically connected to the pair of first terminals 33 and 34, for example, the pair of second terminals 35 and 36 and the pair of first terminals 33 and 34. And may be formed of separate metal plates.

  Further, the restriction piece 326 that functions as a tension stopper for the electric wire 38 may be provided on at least one of the main body 31 and the lid body 32. For example, the restriction piece 326 is provided on the surface 311 of the main body 31 (the bottom surface of the groove 316). It may be provided. Alternatively, the restriction piece 326 may be provided on both the main body 31 and the lid body 32. Further, the lid body 32 is not limited to the configuration that is screwed to the main body 31, and the lid body 32 may be attached to the main body 31 by snap fit.

  Further, the attachment object is not limited to the duct rail 4 and may be a structure such as a wall or a ceiling. That is, the feeding path 1 may be directly attached to a structure such as a wall or a ceiling by the holding member 2 without using the duct rail 4.

(4) Summary As described above, the tightening device 3 according to the first aspect is arranged in the first direction with respect to the power supply path 1 having the pair of core wires 111 and 112 extending in the first direction (left-right direction). It is a tightening device that acts along the tension. The tightening device 3 includes a main body 31, a pair of first terminals 33 and 34, a pair of second terminals 35 and 36, and a tension generator 37. The main body 31 has electrical insulation. The pair of first terminals 33 and 34 mechanically hold one end portions of the pair of core wires 111 and 112 in the first direction and are electrically connected to the pair of core wires 111 and 112. The pair of second terminals 35 and 36 are members that are electrically connected to the pair of first terminals 33 and 34 and connect the electric wire 38. The tension generating unit 37 projects from the main body 31 in one direction in the first direction, and acts on the main body 31 in a direction that pulls the main body 31 in the first direction to the side opposite to the pair of core wires 111 and 112. The main body 31 has a front surface 311 and a back surface 312 on both sides in a second direction (front-rear direction) orthogonal to the first direction. The tension generating part 37 has a fixing part 372 that is fixed to the main body 31 at one end in the first direction. The surface 311 is formed with a housing recess 313 for housing the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36. A holding recess 317 for receiving the fixing portion 372 is formed on the back surface 312.

  According to this configuration, the storage recess 313 that stores the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 is provided on the front surface 311 of the main body 31, and tension is generated on the back surface 312 of the main body 31. A holding recess 317 for receiving the fixing portion 372 of the portion 37 is provided. In short, the storage recess 313 that stores the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 and the holding recess 317 that stores the fixing portion 372 of the tension generation unit 37 are in the second direction of the main body 31. It is provided separately on both sides in the (front-rear direction). Therefore, in the tightening device 3, the tension generating unit 37, the sufficient amount of insulation distance between the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 are secured, The pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 can be arranged side by side in the second direction. Therefore, according to the tightening apparatus 3, there exists an advantage that a width dimension (up-down direction dimension) can be restrained small. Therefore, even when the power supply path 1 is attached to a long attachment object such as the duct rail 4, for example, the degree of freedom of arrangement of the tightening device 3 in the duct rail 4 is increased. That is, if the dimension of the duct rail 4 in the vertical direction is constant, the smaller the dimension of the tensioning device 3 in the vertical direction, the more the arrangement of the tensioning device 3 in the vertical direction in a limited space as in the duct rail 4. The degree of freedom increases. As a result, the degree of freedom of the mounting position in the vertical direction of the power supply path 1 to which tension is applied by the tightening device 3 is also increased.

  In the first aspect, the tightening device 3 according to the second aspect preferably further includes a lid 32 attached to the main body 31 so as to cover the storage recess 313. In this case, at least one of the main body 31 and the lid body 32 is a restriction piece that restricts the movement of the electric wire 38 in the first direction (left-right direction) by sandwiching the electric wire 38 connected to the pair of second terminals 35 and 36. Preferably it has 326. According to this configuration, the restriction piece 326 functions as a tension stopper for the electric wire 38, and when the tension acts on the electric wire 38, the connection between the pair of second terminals 35, 36 and the electric wire 38 is eliminated. Can be prevented. However, this configuration is not an essential configuration for the tightening device 3, and the lid 32 or the restriction piece 326 may be omitted as appropriate.

  In the tightening device 3 according to the third aspect, in the first or second aspect, the tension generating portion 37 has a male screw (main shaft 371) and a female screw (fixing portion 372) coupled to each other, and one of the male screw and the female screw. Is preferably the fixed portion 372. In this case, the inner surface of the holding recess 317 constitutes a rotation restricting portion 317a that restricts the rotation of the fixing portion 372 around the central axis C1 along the first direction (left-right direction) by contacting the fixing portion 372. It is preferable to do. According to this configuration, when the male screw (main shaft 371) and the female screw (fixing portion 372) are coupled to each other, it is not necessary to stop the rotation of the fixing portion 372 using a jig, and thus the male screw and the female screw are coupled to each other. Work becomes easy. However, this configuration is not essential for the tightening device 3, and the rotation restricting portion 317a may be omitted as appropriate.

  The power supply system 10 according to the fourth aspect preferably includes the tightening device 3 according to any one of the first to third aspects and the power supply path 1. According to this configuration, the housing recess 313 that houses the pair of first terminals 33, 34 and the pair of second terminals 35, 36 and the holding recess 317 that houses the fixing portion 372 of the tension generator 37 include the main body 31. Are provided separately on both sides in the second direction (front-rear direction). Therefore, in the tightening device 3, the tension generating unit 37, the sufficient amount of insulation distance between the pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 are secured, The pair of first terminals 33 and 34 and the pair of second terminals 35 and 36 can be arranged side by side in the second direction. Therefore, according to the electric power feeding system 10, there exists an advantage that the width dimension (dimension of an up-down direction) of the tightening apparatus 3 can be restrained small.

1 Power supply path 3 Tightening device 4 Duct rail (object to be mounted)
DESCRIPTION OF SYMBOLS 10 Power supply system 31 Main body 32 Cover body 33, 34 1st terminal 35, 36 2nd terminal 37 Tension generation part 38 Electric wire 111,112 Core wire 311 Front surface 312 Back surface 313 Storage recessed part 317 Holding recessed part 317a Rotation restriction part 326 Restriction piece 371 Main shaft (Male thread)
372 fixed part (female thread)

Claims (4)

A tensioning device that applies a tension along the first direction to a power supply path having a pair of core wires extending in a first direction,
A body having electrical insulation;
A pair of first terminals that mechanically hold one end of the pair of core wires in the first direction and electrically connected to the pair of core wires;
A pair of second terminals that are electrically connected to the pair of first terminals and for connecting wires;
A tension generating portion that protrudes from the main body in one of the first directions, and that exerts tension on the main body in a direction that pulls the main body to the opposite side of the pair of core wires along the first direction;
The main body has a front surface and a back surface on both sides in a second direction orthogonal to the first direction,
The tension generating part has a fixing part fixed to the main body at one end in the first direction,
A storage recess for storing the pair of first terminals and the pair of second terminals is formed on the surface,
A holding recess for accommodating the fixing portion is formed on the back surface. A lid that is attached to the main body so as to cover the storage recess;
The at least one of the said main body and the said cover body has a control piece which controls the movement of the said electric wire to the said 1st direction by pinching | interposing the said electric wire connected to the said pair of 2nd terminal. Tightening device. The tension generating unit has a male screw and a female screw coupled to each other,
One of the male screw and the female screw is the fixing portion,
The tightening device according to claim 1, wherein an inner side surface of the holding recess constitutes a rotation restricting portion that restricts rotation of the fixing portion around a central axis along the first direction by contacting the fixing portion. . The tightening device according to any one of claims 1 to 3,
A power feeding system comprising the power feeding path.

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