JP5797107B2 - Cable tray - Google Patents

Description

  The present invention relates to a cable tray for laying and storing a power cable, a control cable, and the like to an electrical instrumentation device.

  A general cable tray has a U-shaped cross section and has a predetermined length. The cable tray is suspended and supported by a support member at a predetermined interval in the length direction. A large number of power cables and control cables are laid and stored. An example of such a cable tray is described in Patent Document 1 below.

Japanese Utility Model Publication No. 61-138316

  In the conventional cable tray described above, the support member is as rigid as possible to ensure earthquake resistance. However, increasing the rigidity of the support member increases the mass and increases the product cost. There is a problem that workability at the time of additional installation to an existing plant is deteriorated. Therefore, it can be considered that the support member is supported by the damper, but there is a problem that not only the cost is increased, but the arrangement space is increased. In particular, when the number of trays is plural, the size of the apparatus is further increased.

  This invention solves the subject mentioned above, and it aims at providing the cable tray which aims at the improvement of earthquake resistance while suppressing the enlargement and cost increase of an apparatus.

  In order to achieve the above object, a cable tray of the present invention includes a first cable tray main body capable of storing a plurality of cables, and a width direction with respect to the plurality of cables stored in the first cable tray main body. And a weight embedded movably.

  Accordingly, the first cable tray main body accommodates a plurality of cables therein, and the weight is embedded in the plurality of cables so as to be movable in the width direction. Therefore, the first cable tray main body includes the first cable tray main body and the plurality of cables. The dynamic vibration absorber in which the weight becomes the sub vibration system is configured with respect to the main vibration system, and the vibration of the first cable tray body and the plurality of cables and the vibration of the weight resonate to reduce the overall vibration. As a result, the seismic resistance can be improved while suppressing the increase in size and cost of the apparatus.

  In the cable tray of the present invention, the weight has a second cable tray main body that can store a plurality of cables.

  Therefore, by using the second cable tray main body capable of storing a plurality of cables as a weight, it is possible to increase the amount of cables stored while eliminating useless arrangement of heavy objects.

  In the cable tray of the present invention, the second cable tray main body includes a tray that opens upward and a lid that closes the opening of the tray.

  Therefore, the second cable tray main body can prevent the cable from jumping out due to vibration by closing the opening with the lid in a state where a plurality of cables are stored in the tray.

  The cable tray of the present invention is characterized in that a guide member is provided between the plurality of cables in the first cable tray body and the weight so as to support the weight so as to be movable in the width direction.

  Accordingly, the weight moves along the guide member and vibrates with respect to the vibration of the first cable tray main body and the plurality of cables, so that the movement amount of the weight is appropriately secured and the overall vibration reduction effect is improved. be able to.

  In the cable tray of the present invention, an urging member that urges and supports the weight at an intermediate position in the width direction of the guide member is interposed between the weight and the guide member.

  Therefore, by providing the urging member between the weight and the guide member, the movement (vibration) of the weight can be amplified by the urging member, and the overall vibration reduction effect can be improved. Can be reduced in size and weight.

  According to the cable tray of the present invention, the first cable tray main body that can store a plurality of cables, and the weight embedded in the plurality of cables stored in the first cable tray main body so as to be movable in the width direction. Therefore, the vibration of the first cable tray main body and the plurality of cables and the vibration of the weight are resonated to reduce the overall vibration. Can be improved.

FIG. 1 is a schematic diagram illustrating a cable tray unit according to Embodiment 1 of the present invention. FIG. 2 is a schematic diagram illustrating a cable tray support structure according to the first embodiment. FIG. 3 is a cross-sectional view of the cable tray according to the first embodiment. FIG. 4 is a schematic diagram illustrating a dynamic vibration absorber in the cable tray of the first embodiment. FIG. 5 is a cross-sectional view illustrating a cable tray according to the second embodiment of the present invention. FIG. 6 is a cross-sectional view illustrating a cable tray according to a third embodiment of the present invention. FIG. 7 is a cross-sectional view illustrating a cable tray according to a fourth embodiment of the present invention.

  Exemplary embodiments of a cable tray according to the present invention will be described below in detail with reference to the accompanying drawings. In addition, this invention is not limited by this Example, Moreover, when there exists multiple Example, what comprises combining each Example is also included.

  1 is a schematic diagram illustrating a cable tray unit according to a first embodiment of the present invention, FIG. 2 is a schematic diagram illustrating a support structure of the cable tray according to the first embodiment, and FIG. 3 is a cross-sectional view of the cable tray according to the first embodiment. FIG. 4 and FIG. 4 are schematic views showing a dynamic vibration absorber in the cable tray of the first embodiment.

  In the first embodiment, as shown in FIGS. 1 and 2, the cable tray unit 11 includes two cable trays 12 and 13 arranged vertically and supports the two cable trays 12 and 13 vertically at a predetermined interval. And a support member 14. Each cable tray 12, 13 has a predetermined length and can accommodate a plurality of cables 21. The support member 14 has upper and lower horizontal support portions 14a and 14b, which are arranged at predetermined intervals in the longitudinal direction of the cable trays 12 and 13, and the support portions 14a and 14b support the cable trays 12 and 13. It is possible. Each support member 14 is fixed to a gantry (ceiling) 16 with fixing bolts 15 at the top. In this case, the cable trays 12 and 13 have substantially the same configuration.

  That is, as shown in FIG. 3, the cable tray 12 is wider than the first cable tray main body 31 that can store a plurality of cables 21 and the plurality of cables 21 that are stored in the first cable tray main body 31. The second cable tray main body 32 is a weight that is embedded so as to be freely movable in the direction. The second cable tray main body 32 can store a plurality of cables 21. The cable 21 has a structure in which a steel wire is covered with a covering material such as rubber (insulating member) having elasticity.

  The first cable tray main body 31 is composed of a horizontal bottom portion 31a and left and right side portions 31b that rise in the vertical direction from both sides in the width direction of the bottom portion 31a. The second cable tray main body 32 has substantially the same length as the first cable tray main body 31, and includes a tray 33 that opens upward and a lid 34 that closes the opening of the tray 33. The width is narrower than the cable tray body 31 and the height is low. And this tray 33 is comprised from the horizontal bottom part 33a similarly to the 1st cable tray main body 31, and the right-and-left side part 33b which stands | starts up from the both sides of the width direction in this bottom part 33a. Moreover, the lid | cover 34 is comprised from the horizontal ceiling part 34a and the right-and-left side part 34b which stands | starts up in the perpendicular direction from the both sides of the width direction in this ceiling part 34a.

  In this case, the cable tray 12 can ensure a vibration damping effect by forming a dynamic vibration absorber by the first cable tray main body 31, the second cable tray main body 32, and the cable 21. In this dynamic vibration absorber, as shown in FIG. 4, the main vibration system A is configured by the first cable tray body 31 and the cable 21, and the secondary vibration system B is configured by the second cable tray body 32 and the cable 21. . That is, the main vibration system A is set with the mass M1 of the first cable tray main body 31 and the cable 21, the spring constant K1, and the damping coefficient C1, and the secondary vibration system B is set with the mass M2 of the second cable tray main body 32 and the cable 21. A spring constant K2 and a damping coefficient C2 are set.

  Here, the spring constant K1 of the main vibration system A is set by the support rigidity (such as the support member 14) of the first cable tray body 31, and the spring constant K2 of the sub vibration system B is accommodated in the first cable tray body 31. Then, it is set by the covering material of each cable 21 with which the second cable tray main body 32 comes into contact. The second cable tray main body 32 and the cable 21 are sub-vibration systems B with respect to the main vibration system A so that the second cable tray main body 32 and the cables 21 have a mass M1 of the first cable tray main body 31 and the cable 21. It is necessary to adjust the mass M2.

  Therefore, when the cable tray 12 vibrates due to an earthquake or the like, the first cable tray main body 31 and the cable 21 vibrate, and the second cable tray main body 32 and the cable 21 vibrate. At this time, the second cable tray main body 32 moves relative to the first cable tray main body 31 by the gap between the cables 21 and the elastic deformation of the cables 21, and the cables 21 and the cables 21 and Due to energy dissipation due to friction and collision with the cable tray body 32, a vibration damping effect on the first cable tray body 31 can be obtained. That is, the vibration of the first cable tray body 31 and the cable 21 and the second cable tray body 32 and the cable 21 resonate to attenuate the vibration of the cable tray 12.

  Although the cable tray 12 has been described here, the cable tray 13 has the same configuration.

  As described above, in the cable tray of the first embodiment, the first cable tray main body 31 capable of storing the plurality of cables 21 and the width of the plurality of cables 21 stored in the first cable tray main body 31 are wide. A second cable tray main body 32 is provided which is embedded so as to be movable in the direction and can store a plurality of cables 21.

  Therefore, a dynamic vibration absorber in which the second cable tray body 32 and the plurality of cables 21 serve as a secondary vibration system is configured for the main vibration system configured by the first cable tray body 31 and the plurality of cables 21. The vibration of the first cable tray main body 31 and the plurality of cables 21 and the vibration of the second cable tray main body 32 and the plurality of cables 21 resonate to reduce the vibration of the cable tray 12, thereby increasing the size of the apparatus. In addition, it is possible to improve the earthquake resistance while suppressing the increase in cost.

  Further, in the cable tray of the first embodiment, the first and second cable tray bodies 31 and 32 form a dynamic vibration absorber, so that a large number of cables 21 can be stored while eliminating useless heavy objects. Thus, an increase in the amount of cable storage can suppress an increase in the size of the apparatus.

  In the cable tray according to the first embodiment, the second cable tray main body 32 includes a tray 33 that opens upward and a lid 34 that closes the opening of the tray 33. Therefore, the opening of the second cable tray main body 32 is closed by the lid 34 in a state where the plurality of cables 21 are stored in the tray 33, and the jumping of the cable due to vibration can be prevented.

  FIG. 5 is a cross-sectional view illustrating a cable tray according to the second embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the second embodiment, as shown in FIG. 5, the cable tray 41 includes a first cable tray main body 31 that can store a plurality of cables 21 and a plurality of cables 21 that are stored in the first cable tray main body 31. On the other hand, the second cable tray main body 32 that is embedded so as to be movable in the width direction and can store the plurality of cables 21, and between the plurality of cables 21 in the first cable tray main body 31 and the second cable tray main body 32. The second cable tray main body 32 includes a guide member 42 that supports the second cable tray main body 32 so as to be movable in the width direction.

  The first cable tray body 31 can accommodate a plurality of cables 21 therein. The guide member 42 has substantially the same length as the first cable tray main body 31, and is composed of a horizontal bottom portion 42a and left and right side portions 42b that rise in the vertical direction from both sides in the width direction of the bottom portion 42a. . The guide member 42 is narrower and lower in height than the first cable tray main body 31, and wider than the second cable tray main body 32 and lower in height. ing. The second cable tray main body 32 has substantially the same length as the first cable tray main body 31 and includes a tray 33 and a lid 34, and a plurality of cables 21 can be accommodated therein.

  The second cable tray main body 32 is placed inside the guide member 42, and the bottom 33a is in contact with the bottom 42a, while a gap is secured between the left and right side portions 33b and the left and right side portions 42b. Yes. Further, the elastic member 43 is fixed to the guide member 42 so as to face the left and right side portions 33b of the second cable tray main body 32 inside the left and right side portions 42b.

  In this case, since the inner width of the guide member 42 is larger than the outer width of the second cable tray main body 32, the second cable tray main body 32 can move in the width direction within the guide member 42. By increasing the vibration of the secondary vibration system (second cable tray main body 32 and cable 21) with respect to the main vibration system (first cable tray main body 31 and cable 21) with a dynamic vibration absorber, a greater vibration damping effect is obtained. be able to.

  In addition, it is preferable to interpose a material capable of controlling the friction coefficient such as a resin lining on the contact surface between the bottom 33b of the second cable tray main body 32 and the bottom 42a of the guide member 42. This friction coefficient may be set according to the mass of the main vibration system or the sub vibration system.

  Therefore, when the cable tray 41 vibrates due to an earthquake or the like, the first cable tray main body 31 and the cable 21 vibrate, and the second cable tray main body 32 and the cable 21 vibrate along the guide member 42. At this time, the second cable tray main body 32 moves relative to the first cable tray main body 31 by the gap between the guide member 42 and the elastic deformation of the cable 21, and the cables 21 and the cables 21 and Due to energy dissipation due to friction and collision with the two cable tray main bodies 32, a vibration damping effect on the first cable tray main body 31 can be obtained. That is, the vibrations of the first cable tray main body 31 and the cable 21 and the second cable tray main body 32 and the cable 21 resonate and the vibration of the cable tray 41 is attenuated.

  As described above, in the cable tray according to the second embodiment, the first cable tray main body 31 capable of storing the plurality of cables 21 and the width of the plurality of cables 21 stored in the first cable tray main body 31 are wide. The second cable tray main body 32 that is embedded in the direction of movement and can store the plurality of cables 21, and the second cable tray main body 32 between the plurality of cables 21 in the first cable tray main body 31 and the second cable tray main body 32. A guide member 42 that supports the cable tray main body 32 so as to be movable in the width direction is provided.

  Accordingly, the secondary vibration system constituted by the second cable tray main body 32 and the plurality of cables 21 vibrates along the guide member 42 with respect to the main vibration system constituted by the first cable tray main body 31 and the plurality of cables 21. Thus, the vibration of the first cable tray main body 31 and the plurality of cables 21 and the vibration of the second cable tray main body 32 and the plurality of cables 21 resonate to cause vibration of the cable tray 41. Therefore, the seismic resistance can be improved while suppressing the increase in size and cost of the apparatus.

  In the cable tray of the second embodiment, the guide member 42 fixes the elastic member 43 to the left and right side portions 33b of the second cable tray main body 32 inside the left and right side portions 42b. Therefore, the impact caused by the contact between the second cable tray main body 32 and the guide member 42 can be reduced, and damage to the second cable tray main body 32 and the cable 21 can be prevented.

  FIG. 6 is a cross-sectional view illustrating a cable tray according to a third embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the third embodiment, as illustrated in FIG. 6, the cable tray 51 includes a first cable tray main body 31 that can store a plurality of cables 21 and a plurality of cables 21 that are stored in the first cable tray main body 31. On the other hand, the second cable tray main body 32 that is embedded so as to be movable in the width direction and can store the plurality of cables 21, and between the plurality of cables 21 in the first cable tray main body 31 and the second cable tray main body 32. The second cable tray main body 32 includes a guide member 42 that supports the second cable tray main body 32 movably in the width direction, and the second cable tray main body 32 is interposed between the second cable tray main body 32 and the guide member 42 in the width of the guide member 42. Compression springs (biasing members) 52 and 53 for biasing and supporting are provided at intermediate positions in the direction.

  The first cable tray body 31 can accommodate a plurality of cables 21 therein. The guide member 42 has substantially the same length as the first cable tray main body 31, and is composed of a horizontal bottom portion 42a and left and right side portions 42b that rise in the vertical direction from both sides in the width direction of the bottom portion 42a. . The guide member 42 is narrower and lower in height than the first cable tray main body 31, and wider than the second cable tray main body 32 and lower in height. ing. The second cable tray main body 32 has substantially the same length as the first cable tray main body 31 and includes a tray 33 and a lid 34, and a plurality of cables 21 can be accommodated therein.

  The second cable tray body 32 is placed on the inner side of the guide member 42, and the bottom 33a contacts the bottom 42a, while a gap is secured between the left and right side portions 33b and the left and right side portions 42b. Yes. In this case, since the inner width of the guide member 42 is larger than the outer width of the second cable tray main body 32, the second cable tray main body 32 can move in the width direction within the guide member 42. A plurality of compression springs 52 are interposed between the bottom 33a of the second cable tray main body 32 and the bottom 42a of the guide member 42, and the side 33b of the second cable tray main body 32 and the guide member 42 side. A plurality of compression springs 53 are interposed between the portion 42b.

  By increasing the vibration of the secondary vibration system (second cable tray main body 32 and cable 21) with respect to the main vibration system (first cable tray main body 31 and cable 21) by the compression springs 52 and 53 in the dynamic vibration absorber, A great vibration control effect can be obtained.

  Therefore, when the cable tray 51 vibrates due to an earthquake or the like, the first cable tray main body 31 and the cable 21 vibrate, and the second cable tray main body 32 and the cable 21 vibrate along the guide member 42. At this time, the second cable tray main body 32 moves relative to the first cable tray main body 31 by the gap between the guide member 42 and the elastic deformation of the cable 21, and the cables 21 and the cables 21 and Due to energy dissipation due to friction and collision with the two cable tray main bodies 32, a vibration damping effect on the first cable tray main body 31 can be obtained. In this case, since the moving force of the second cable tray main body 32 is amplified by the compression springs 52 and 53, the mass of the secondary vibration system can be reduced, and a greater vibration damping effect can be obtained. That is, the vibration of the first cable tray main body 31 and the cable 21 and the second cable tray main body 32 and the cable 21 resonate to attenuate the vibration of the cable tray 51.

  As described above, in the cable tray of the third embodiment, the first cable tray main body 31 that can store the plurality of cables 21 and the width of the plurality of cables 21 stored in the first cable tray main body 31 are wide. The second cable tray main body 32 that is embedded in the direction of movement and can store the plurality of cables 21, and the second cable tray main body 32 between the plurality of cables 21 in the first cable tray main body 31 and the second cable tray main body 32. It comprises a guide member 42 that supports the cable tray body 32 so as to be movable in the width direction, and compression springs 52 and 53 are interposed between the second cable tray body 32 and the guide member 42.

  Accordingly, the secondary vibration system constituted by the second cable tray main body 32 and the plurality of cables 21 vibrates along the guide member 42 with respect to the main vibration system constituted by the first cable tray main body 31 and the plurality of cables 21. At the same time, a dynamic vibration absorber whose vibration is amplified by the compression springs 52 and 53 is configured, and the vibration of the first cable tray main body 31 and the plurality of cables 21 and the second cable tray main body 32 and the plurality of cables 21 are The vibration resonates and the vibration of the cable tray 51 is reduced, and the seismic resistance can be improved while suppressing the increase in size and cost of the apparatus.

  FIG. 7 is a cross-sectional view illustrating a cable tray according to a fourth embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the member which has the function similar to the Example mentioned above, and detailed description is abbreviate | omitted.

  In the fourth embodiment, as shown in FIG. 7, the cable tray 61 includes a first cable tray main body 31 that can store a plurality of cables 21 and a plurality of cables 21 that are stored in the first cable tray main body 31. On the other hand, it is comprised from the 2nd cable tray main body 32 which was embed | buried movably in the width direction and can accommodate the some cable 21. FIG.

  The first cable tray body 31 can accommodate a plurality of cables 21 therein. The second cable tray main body 32 has substantially the same length as the first cable tray main body 31 and includes a tray 33 and a lid 34, and a plurality of cables 21 can be accommodated therein. The second cable tray main body 32 is placed inside the first cable tray main body 31, and the bottom 33a contacts the bottom 31a, while there is a gap between the left and right side portions 33a and the left and right side portions 31b. It is secured. The plurality of cables 21 are arranged so as to fill the second cable tray main body 32 in the first cable tray main body 31.

  Therefore, when the cable tray 51 vibrates due to an earthquake or the like, the first cable tray main body 31 and the cable 21 vibrate, and the second cable tray main body 32 and the cable 21 vibrate. At this time, the second cable tray main body 32 moves relative to the first cable tray main body 31 by the clearance and the elastic deformation of the cable 21, and the cables 21, and further, the cable 21 and the second cable tray main body. Due to the energy dissipation due to the friction and collision with 32, a vibration damping effect on the first cable tray body 31 can be obtained. That is, the vibration of the first cable tray body 31 and the cable 21 and the second cable tray body 32 and the cable 21 resonate to attenuate the vibration of the cable tray 12.

  As described above, in the cable tray of the fourth embodiment, the first cable tray main body 31 capable of storing the plurality of cables 21 and the width of the plurality of cables 21 stored in the first cable tray main body 31 are wide. A second cable tray main body 32 is provided which is embedded in a movable manner in the direction and can store a plurality of cables 21.

  Accordingly, a dynamic vibration absorber is configured in which the secondary vibration system composed of the second cable tray body 32 and the plurality of cables 21 vibrates with respect to the main vibration system composed of the first cable tray body 31 and the plurality of cables 21. As a result, the vibration of the first cable tray main body 31 and the plurality of cables 21 and the vibration of the second cable tray main body 32 and the plurality of cables 21 resonate to reduce the vibration of the cable tray 61. The seismic resistance can be improved while suppressing the increase in size and cost of the apparatus.

  In each of the above-described embodiments, the first cable tray main body 31, the second cable tray main body 32, and the guide member 42 have substantially the same length in the longitudinal direction. The tray body 32 may be shortened, or a plurality of guide members 42 may be provided in series with the first and second cable tray bodies 31 and 32. Moreover, although the weight of the present invention is the second cable tray main body 32, it may be a heavy object.

  Moreover, although the shape of each cable tray main body 31 and 32 was made into the rectangular cross-sectional shape which opened upwards, it is good also as a semicircle shape.

12, 13, 41, 51, 61 Cable tray 21 Cable 31 First cable tray main body 32 Second cable tray main body 33 Tray 34 Lid 42 Guide member 43 Elastic member 52, 53 Compression spring

Claims (5)

A first cable tray body capable of storing a plurality of cables;
A weight embedded movably in the width direction with respect to the plurality of cables housed in the first cable tray body;
A cable tray comprising:   The cable tray according to claim 1, wherein the weight has a second cable tray main body capable of storing a plurality of cables.   The cable tray according to claim 2, wherein the second cable tray body includes a tray that opens upward and a lid that closes the opening of the tray.   4. The guide member according to claim 1, wherein a guide member is provided between the plurality of cables in the first cable tray main body and the weight so as to support the weight so as to be movable in a width direction. 5. Cable tray as described in   The cable tray according to claim 4, wherein a biasing member that biases and supports the weight at an intermediate position in the width direction of the guide member is interposed between the weight and the guide member.

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