JP2014117097A - Cable supporting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To certainly seal the periphery of a cable with a packing, by simple work.SOLUTION: A cable supporting device includes: a first cylinder body 30 provided on a partition wall 10 and in which a cable 20 is inserted; an annular packing 40 installed in a packing storing hole 34 in the first cylinder body 30 and in which the cable 20 is inserted; and a second cylinder body 50 united on a base end side of the packing storing hole 34 by a screw. The first cylinder body 30 is formed with a female screw hole 35 ranging to the packing storing hole 34 and having an inner diameter larger than an inner diameter of the packing storing hole 34. The second cylinder body 50 is formed with a coupling cylinder portion 51 formed with a male screw portion capable of screwing with the female screw hole 35, a packing pressing cylinder portion 53 formed at a tip end portion of the coupling cylinder portion 51 and entering the packing storing hole 34, and a second stopper surface 54 abutting on a first stopper surface 36 in the first cylinder body 30 to regulate further screwing when the total length of the packing pressing cylinder portion 53 is immersed in the packing storing hole 34.

Description

  The present invention relates to a cable support device that supports a cable inserted through a partition wall.

  As an example of a cable support device that supports a cable inserted through a partition wall, for example, there is one disclosed in Patent Document 1 below.

  The cable support device includes a first cylinder that is attached to a partition wall and into which a cable can be inserted, an annular packing that is attached to a packing accommodation hole formed in the first cylinder and that can be inserted with a cable, and a packing accommodation hole. A second cylinder having a male screw threadably engageable with a female screw formed on the inner peripheral surface.

  In this cable support device, the male screw of the second cylinder is screwed into the female screw of the first cylinder, the male screw is inserted into the packing accommodation hole of the first cylinder, and the annular packing in the packing accommodation hole is pivoted. Compressed in the direction. When the axial packing is more than a certain level of compression in the axial direction, the bulge in the radial direction causes the inner periphery to be in close contact with the outer periphery of the cable and the outer periphery to be in close contact with the inner peripheral surface of the packing receiving hole. Seal around the.

Japanese Utility Model Publication No. 03-110725

  However, in the cable support device described in Patent Document 1, it is difficult to manage the screwing amount of the male screw of the second cylinder with respect to the female screw of the first cylinder. The expansion of the packing in the radial direction becomes too small, and the cable sealing function by the packing is lowered. Conversely, if the amount of screwing is large, the annular packing may be damaged.

  In particular, in the cable support device described in Patent Document 1, since the female screw is formed on the inner peripheral surface of the packing accommodation hole, the annular packing cannot move smoothly in the packing accommodation hole. For this reason, if the movement of the annular packing is restricted by the female screw in the process of screwing the male screw of the second cylindrical body into the female screw formed on the inner peripheral surface of the packing housing hole, Although the packing is not in contact with the bottom of the packing receiving hole, the operator may recognize that the male screw has been sufficiently screwed into the female screw.

  That is, in the prior art, there is a problem that it is difficult to reliably seal the periphery of the cable with packing.

  Then, an object of this invention is to provide the cable support apparatus which can seal the circumference | surroundings of a cable with packing reliably by simple operation | work.

A cable support device as one aspect of the invention for achieving the above object is as follows:
A first cylinder that is provided in a partition wall that divides the space into a first space and a second space, communicates the first space and the second space, and has a first through-hole portion through which a cable is inserted. When the screw is coupled to a part of the first through hole portion of the first cylindrical body and the first cylindrical body is screw coupled, the cable is inserted through the first through hole portion. A second cylinder in which a second through-hole portion is formed, and an annular packing formed of an elastic material and having a through-hole through which the cable is inserted,
The first through-hole portion of the first cylindrical body has a first hole whose tip is open into the first space and a cable can be inserted, and a base end of the first hole that is coaxial with the first hole. A packing housing hole having an inner diameter larger than that of the first hole, and a base end of the packing housing hole located on the opposite side of the first hole, are connected coaxially with the first hole and from the packing housing hole. A female screw hole that opens into the second space with a large inner diameter, and a first stopper surface that protrudes in a radial direction from the proximal end of the packing accommodation hole due to an inner diameter difference between the packing accommodation hole and the female screw hole. Formed,
The annular packing has an outer diameter larger than an inner diameter of the first hole and smaller than an inner diameter of the packing accommodation hole so that the outer diameter can be accommodated in the packing accommodation hole.
The second cylinder includes a coupling cylinder part formed on the outer periphery with a male thread part screwed into the female screw hole, and a first space side from a tip of the coupling cylinder part on the first space side. And is formed in a cylindrical shape that is coaxial with the coupling cylinder portion, and when the screwing amount of the male screw portion with respect to the female screw hole exceeds a certain value, it enters the packing accommodating hole and enters the packing accommodating hole. A packing pressing cylinder portion that compresses the annular packing in the axial direction, and projects radially from the proximal end portion of the packing pressing cylinder portion, and the first length when the entire length of the packing pressing cylinder portion is immersed in the packing accommodation hole. A second stopper surface abutting on the stopper surface is formed,
The amount of protrusion from the second stopper surface in the packing pressing cylinder portion is such that when the second stopper surface is in contact with the first stopper surface, the annular packing in the packing receiving hole is moved to the first space side. It is an amount that can be crushed by a predetermined amount.

  In the cable support device, when the screwing amount of the coupling cylinder part of the second cylinder with respect to the female screw hole of the first cylinder exceeds a certain value, the packing pressing cylinder part of the second cylinder enters the packing accommodation hole. Then, the annular packing in the packing accommodation hole is moved in the axial direction. When the annular packing comes into contact with the bottom of the packing accommodation hole, the annular packing is compressed in the axial direction by the packing pressing cylinder and swells in the radial direction.

  By the way, in the said cable support apparatus, the internal thread is not formed in the inner peripheral surface of a packing accommodation hole. For this reason, in the above process, the movement of the annular packing in the packing accommodation hole and the axial compression are smoothly performed.

  In the cable support device, the amount of screwing of the coupling cylinder portion of the second cylinder with respect to the female screw hole of the first cylinder is such that the second stopper surface formed on the second cylinder is formed on the first cylinder. The maximum value is when it comes into contact with the first stopper surface, and further screwing is restricted.

  In the cable support device, when the second stopper surface comes into contact with the first stopper surface, the entire length of the packing pressing cylinder portion is immersed in the packing accommodation hole, and the axial compression of the annular packing is maximized. In addition, the radial expansion of the annular packing is maximized. The annular packing at this time has an inner periphery that is in close contact with the outer periphery of the cable and an outer periphery that is in close contact with the inner peripheral surface of the packing receiving hole, and seals the periphery of the cable through which the annular packing is inserted. Secure to one cylinder.

  In other words, in the cable support device, when the second stopper surface comes into contact with the first stopper surface, the annular packing seals the periphery of the cable and is adequately swelled as necessary and sufficient for securing the cable. It becomes a state.

  Therefore, in the cable support device, an operator who assembles the second cylinder to the first cylinder simply turns the second cylinder into the first cylinder until the second stopper surface comes into contact with the first stopper surface. It is only necessary to screw it in, and the degree of adhesion of the annular packing to the cable inserted through the partition wall can be ensured to an appropriate value regardless of skill. As a result, it is possible to suppress the occurrence of inconvenience due to insufficient adhesion of the annular packing, such as a decrease in the supporting force for the cable and a decrease in the sealing performance.

  Here, the cable support device includes a lock nut that is screwed into a male screw portion of the second cylindrical body, and the male screw portion is screwed into the female screw hole by the screwing of the male screw portion. The lock nut can be moved between a standby position away from the base end of the first cylinder and a lock position abutting the base end of the first cylinder in a state where the lock nut is in contact with the first stopper surface. You may have a screwing allowance.

  In the cable support device, in a state where the lock nut that is screwed into the male thread portion of the second cylinder is moved to the standby position, the second cylinder is moved until the second stopper surface comes into contact with the first stopper surface. Screw into the first cylinder. After that, the lock nut located at the standby position is moved to the lock position where it abuts against the base end of the first cylinder, so that the second stopper surface is brought into contact with the second cylinder and the first cylinder. It can lock to the state which contact | abutted to the 1st stopper surface, and it can prevent that the screwing between a 2nd cylinder and a 1st cylinder is loosened by the vibration from the outside.

  In any of the cable support devices described above, a partition fixing portion that penetrates the partition and is fixed to the partition may be formed in the first cylindrical body. In this case, the partition fixing portion may be a male screw portion for connection formed on the outer peripheral side of the first hole in the first cylinder.

  In the case of the cable support device, the first cylindrical body is screwed into the female screw portion for connection on the partition wall with the male screw portion for connection on the peripheral wall of the first hole in a state where the cable is inserted, It can be easily fixed to the partition wall. For example, the annular packing supporting the cable can be made by assembling the annular packing and the second cylinder through which the cable is inserted into the first cylinder fixed to the partition wall.

  In any one of the cable support devices described above, the packing storage hole has a reduced-diameter hole portion whose inner diameter gradually decreases as the first hole approaches the first hole, and the annular packing includes the through-hole. You may have a diameter-reduced trunk | drum part which an outer diameter becomes small gradually as it approaches one side of the direction which has penetrated.

  In the said cable support apparatus, it becomes easy to put annular packing in a packing accommodation hole. Further, in the cable support device, the contact pressure between the outer peripheral surface of the annular packing and the inner peripheral surface of the packing storage hole is increased, and the sealing performance between the outer peripheral surface of the annular packing and the inner peripheral surface of the packing storage hole is improved. it can.

  In any of the cable support devices described above, the annular packing may have a cylindrical structure, and an axial length dimension may be 1.5 times or more a width dimension from the inner peripheral surface to the outer peripheral surface.

  In the cable support device, even when the annular packing is compressed in the axial direction, the axial length of the annular packing can be maintained relatively long, and the fixing force acting on the cable can be improved.

  According to the present invention, the periphery of the cable can be reliably sealed with the packing by a simple operation.

It is a schematic diagram which shows the arrangement | sequence state before the assembly of the cable support apparatus in 1st embodiment which concerns on this invention. It is A arrow directional view of FIG. It is a B arrow line view of FIG. It is C arrow line view of FIG. It is a D arrow line view of FIG. From the state shown in FIG. 1, the first cylinder is screwed to the partition wall, and an annular packing is attached to the packing accommodation hole of the first cylinder, and the second cylinder before being screwed to the first cylinder. It is a principal part notched side view of the cable support apparatus of the state which screwed the lock nut in the stand-by position of the male thread part. From the state shown in FIG. 6, a part of the state in which the coupling cylinder portion of the second cylinder is screwed into the female screw hole of the first cylinder and the second stopper surface is brought into contact with the first stopper surface is shown in cross section. It is a principal part notched side view of the cable support apparatus shown. From the state shown in FIG. 7, the lock nut on the second cylinder is moved to the lock position, and a part of the state where the screwed state of the second cylinder with respect to the first cylinder is locked is shown in cross section. It is a principal part notched side view of a cable support apparatus. It is a principal part notched side view before the cable support completion of the cable support apparatus in 2nd embodiment which concerns on this invention. It is a principal part notched side view after the cable support completion of the cable support apparatus in 2nd embodiment which concerns on this invention.

  First, a first embodiment of a cable support device according to the present invention will be described in detail with reference to FIGS.

  As shown in FIG. 8, the cable support device M of the present embodiment is provided in the partition wall 10 that partitions the inner space Ia and the outer space Oa, and supports the cable 20 inserted through the partition wall 10.

  The partition wall 10 is a wall plate that covers the periphery of devices and equipment disposed in the inner space Ia. As shown in FIG. 1, the partition wall 10 is inserted through the cable 20, and the first cylinder 30 of the cable support device M to be described later. A female screw hole 12 for connection to be screwed is formed. In the case of this embodiment, the female screw hole 12 for connection is a taper screw for pipes.

  The cable 20 is a circular cross-section electric wire cable connected to a device or facility installed in the inner space Ia.

  As shown in FIG. 1, the cable support device M of the present embodiment includes a first cylinder 30, an annular packing 40, a second cylinder 50, and a lock nut 60. In FIG. 1, the first cylindrical body 30, the second cylindrical body 50, and the lock nut 60 have an internal structure with one side of the central axis Cl being a longitudinal section. Further, the annular packing 40 is shown in a longitudinal sectional view on both sides of the central axis Cl.

  The first cylinder 30 is provided fixed to the partition wall 10. This 1st cylinder 30 is a cylinder structure which has the 1st through-hole part 31 which connects the inner side space Ia and the outer side space Oa.

  As shown in FIGS. 1 and 2, the first through-hole portion 31 has a first hole 33 and a packing in order from the distal end side (lower end side in FIG. 1) to the proximal end side of the first cylindrical body 30. The accommodation hole 34 and the female screw hole 35 are formed side by side. A first stopper surface 36 is provided between the packing accommodation hole 34 and the female screw hole 35.

  The first hole 33 is a hole through which the cable 20 can be inserted. On the outer peripheral surface of the peripheral wall of the first hole 33, a male screw portion 38 for connection is engraved. The male screw portion 38 is a partition fixing portion that penetrates the partition 10 and is fixed to the partition 10. More specifically, the male screw portion 38 is a pipe taper screw that is screwed into the female screw hole 12 for connection of the partition wall 10 and is fixed to the partition wall 10 by screwing. On the proximal end side of the male screw portion 38, a grip portion 39 having an outer periphery formed in a hexagonal shape is formed. The grip portion 39 is a portion that becomes a grip portion when the male screw portion 38 is screwed into the connecting female screw hole 12.

  As shown in FIG. 6, the first hole 33 has a tip at the inner space Ia when the first cylinder 30 is fixed to the partition wall 10 by screwing between the male screw portion 38 and the female screw hole 12 of the partition wall 10. Open to.

  The packing accommodation hole 34 is a hole that is coaxially connected to the first hole 33 at the base end (the upper end in FIG. 1) of the first hole 33 described above. Further, the packing accommodation hole 34 has an inner diameter D2 larger than an inner diameter D1 of the first hole 33.

  The female screw hole 35 is a screw hole formed at the base end (upper end in FIG. 1) of the packing housing hole 34 located on the opposite side of the first hole 33 so as to be coaxial with the first hole 33. As shown in FIG. 6, the female screw hole 35 is formed with an inner diameter D <b> 3 larger than the packing accommodation hole 34. As shown in FIG. 6, in the state where the first cylindrical body 30 is fixed to the partition wall 10, the first cylindrical body 30 opens to the outer space Oa.

  The first stopper surface 36 is a flat surface formed to protrude in the radial direction at the proximal end of the packing accommodation hole 34. The first stopper surface 36 is formed by a difference in inner diameter between the packing accommodation hole 34 and the female screw hole 35.

  The annular packing 40 is formed in a cylindrical structure by an elastic material made of synthetic rubber having oil resistance and heat resistance such as nitrile rubber and fluorine rubber. As shown in FIG. 1, the annular packing 40 has an outer diameter d <b> 4 larger than the inner diameter D <b> 1 of the first hole 33 and slightly smaller than the inner diameter D <b> 2 of the packing accommodation hole 34. In the annular packing 40, the inner diameter d5 of the through hole 41 in the cylindrical structure is set to be slightly larger than the outer diameter D4 of the cable 20. Therefore, the cable 20 can be inserted into the through hole 41.

  When the annular packing 40 is in a natural state where no load is applied, the axial length dimension L5 is set to be 1.5 times or more the width dimension t from the inner peripheral surface to the outer peripheral surface.

  As shown in FIG. 6, when the annular packing 40 is installed in the packing accommodation hole 34, the through hole 41 communicates with the first hole 33, and the cable 20 is inserted into the through hole 41 through the first hole 33. Is inserted.

  Further, the annular packing 40 has an axial length L5 in a natural state shorter than an axial length L6 of the packing accommodation hole 34. Therefore, as shown in FIG. 6, the entire length of the annular packing 40 attached to the packing accommodation hole 34 is accommodated in the packing accommodation hole 34, and further sinks into the packing accommodation hole 34 by an appropriate distance ΔL from the first stopper surface 36. It fits in the crowded state.

  When the annular packing 40 is appropriately placed in the packing housing hole 34 by a distance ΔL, the packing pressing cylinder portion 53 of the second cylinder 50 described later enters the packing housing hole 34. The occurrence of inconvenience such as the annular packing 40 being sandwiched between the opening edge of the packing receiving hole 34 and the packing pressing cylinder portion 53 can be prevented.

  Further, the annular packing 40 swells in the radial direction by axial compression by a packing pressing cylinder portion 53 described later. As shown in FIG. 7, when the second stopper surface 54 comes into contact with the first stopper surface 36, the annular packing 40 comes into close contact with the outer peripheral surface of the cable 20 and the outer peripheral surface accommodates the packing. The cable 20 is fixed to the first cylindrical body 30 while being in close contact with the inner peripheral surface of the hole 34 to seal the periphery of the cable 20.

  As shown in FIG. 1, the second cylinder 50 includes a coupling cylinder 51 that is screw-coupled to the female screw hole 35 of the first cylinder 30 and a coupling cylinder 51 that is located on the packing housing hole 34 side. A packing pressing cylinder portion 53 extending at the tip (the lower end in FIG. 1), a second stopper surface 54 provided between the packing pressing cylinder portion 53 and the coupling cylinder portion 51, and a grip for rotation operation. Part 58 is formed.

  The coupling cylinder portion 51 has a male screw portion 52 that is screwed into the female screw hole 35 on the outer periphery. Further, the inner hollow portion 55 in the coupling cylinder portion 51 is a through-hole through which the cable 20 can be inserted. Furthermore, an enlarged cylindrical portion 56 having an inner diameter larger than that of the hollow portion 55 is formed on the proximal end side (the upper end side in FIG. 1) of the hollow portion 55. A female screw 57 is formed on the inner periphery of the enlarged diameter cylindrical portion 56. The female screw 57 is a screw for screwing a tube connector joined to the end of the protective tube fitted and attached to the cable 20. The hollow portion 55 and the enlarged diameter cylindrical portion 56 both form a second through hole portion through which the cable 20 is inserted.

  Further, on the outer periphery of the diameter-expanded cylindrical portion 56, a grip portion 58 having a hexagonal outer periphery is formed. The grip portion 58 is a portion that becomes a grip portion when the male screw portion 52 of the second cylindrical body 50 is screwed into the female screw hole 35 of the first cylindrical body 30.

  The axial length L1 of the male screw portion 52 is greater than the axial length L2 (see FIG. 6) of the female screw hole 35 in the first cylinder 30 and the lock nut 60 described later. It is long as much as the screwing allowance.

  The packing pressing cylinder part 53 extends in a cylindrical structure coaxial with the coupling cylinder part 51 at the tip of the coupling cylinder part 51. When the screwing amount of the male screw portion 52 with respect to the female screw hole 35 exceeds a certain value, the packing pressing cylinder portion 53 enters the packing housing hole 34 and compresses the annular packing 40 in the packing housing hole 34 in the axial direction. To do. The packing pressing cylinder portion 53 may have a part or all of a cylindrical cylinder shape that is coaxial with the coupling cylinder portion 51 in addition to the cylindrical shape.

  The second stopper surface 54 is a flat surface formed to project in the radial direction at the proximal end portion of the packing pressing cylinder portion 53. As shown in FIG. 7, the second stopper surface 54 comes into contact with the first stopper surface 36 when the full length L3 (see FIG. 1) of the packing pressing cylinder portion 53 is immersed in the packing accommodation hole 34, and is thus internally threaded. Further screwing of the male screw portion 52 into the hole 35 is restricted.

  When the full length L3 (see FIG. 1) of the packing pressing cylinder portion 53 is immersed in the packing accommodation hole 34, the annular packing 40 is compressed in the axial direction by the pressing of the packing pressing cylinder portion 53, and in the radial direction, It becomes a bulging state. In this state, as described above, the annular packing 40 has its inner peripheral surface in close contact with the outer peripheral surface of the cable 20, and its outer peripheral surface is in close contact with the inner peripheral surface of the packing accommodation hole 34 to seal the periphery of the cable 20. At the same time, the cable 20 is fixed to the first cylinder 30.

  The gripping portion 58 for rotating operation has a hexagonal outer periphery, and is used for rotating operation when the male screw portion 52 is screwed into the female screw hole 35.

As shown in FIG. 6, the lock nut 60 is a nut that is screwed into the male screw portion 52 of the second cylinder 50. The male screw portion 52 is in a state where the second stopper surface 54 is in contact with the first stopper surface 36 by the screwing of the male screw portion 52 into the female screw hole 35 (see FIG. 7). The length in the axial direction is set so as to leave
Here, the screwing allowance L4 of the lock nut 60 is, as shown in FIG. 7, a standby position Pt where the lock nut 60 is separated from the base end of the first cylinder 30 by a distance L4, and the lock nut 60 is the first cylinder. This is the extra length of the male screw portion 52 to which the lock nut 60 can move between the lock position Pr contacting the base end of the body 30.

  Next, an operation procedure for assembling the cable support device M of the present embodiment to the partition wall 10 and supporting the partition wall 10 will be described with reference to the drawings.

  First, as shown in FIG. 6, the first cylindrical body 30 is fixed to the partition wall 10 by screwing the male thread portion 38 for connection of the first cylinder body 30 into the female screw hole 12 for connection of the partition wall 10. To do. Next, the annular packing 40 is put into the packing accommodation hole 34 of the first cylinder 30 fixed to the partition wall 10. Next, the cable 20 is inserted through the second cylinder 50 to which the lock nut 60 is attached. Next, the cable 20 is inserted into the annular packing 40 contained in the packing accommodation hole 34 of the first cylinder 30, and is inserted into the first hole 33 of the first cylinder 30. Is positioned on the inner space Ia side of the partition wall 10.

  Here, the annular packing 40 is inserted into the packing accommodation hole 34 of the first cylinder 30 fixed to the partition wall 10, and then the cable 20 is inserted into the annular packing 40. After inserting 20, the annular packing 40 through which the cable 20 is inserted may be inserted into the packing accommodation hole 34.

  Next, as shown in FIG. 7, the male threaded portion 52 of the second cylinder 50 in which the lock nut 60 is screwed to the standby position Pt is held until the second stopper surface 54 comes into contact with the first stopper surface 36. Screw into the screw hole 35. By screwing the second cylinder 50 at this time, the annular packing 40 is compressed in the axial direction by a certain length.

  Next, as shown in FIG. 8, when the lock nut 60 is moved from the standby position Pt to the lock position Pr and the screwed state between the female screw hole 35 and the male screw portion 52 is locked, all the operations are completed.

  In the cable support device M of this embodiment, when the screwing amount of the coupling cylinder portion 51 of the second cylinder 50 with respect to the female screw hole 35 of the first cylinder 30 exceeds a certain value, the packing pressing of the second cylinder 50 is performed. The cylindrical portion 53 enters the packing accommodating hole 34 and moves the annular packing 40 in the packing accommodating hole 34 in the axial direction. When the annular packing 40 comes into contact with the bottom of the packing accommodation hole 34, the annular packing 40 is compressed in the axial direction by the packing pressing cylinder portion 53 and expands in the radial direction.

  By the way, the internal thread is not formed in the inner peripheral surface of the packing accommodation hole 34 of this embodiment. For this reason, the movement of the annular packing 40 in the packing accommodation hole 34 and the axial compression are smoothly performed in the above process.

  In the present embodiment, the screw amount of the coupling cylinder portion 51 of the second cylinder 50 with respect to the female screw hole 35 of the first cylinder 30 is such that the second stopper surface 54 formed on the second cylinder 50 is the first. The maximum value is when the first stopper surface 36 formed on the cylindrical body 30 abuts, and further screwing is restricted.

  When the second stopper surface 54 comes into contact with the first stopper surface 36, the entire length of the packing pressing cylinder portion 53 is immersed in the packing accommodating hole 34, and the axial compression of the annular packing 40 is maximized. The expansion of the annular packing 40 in the radial direction is also maximized. At this time, the annular packing 40 has an inner periphery that is in close contact with the outer periphery of the cable 20 and an outer periphery that is in close contact with the inner peripheral surface of the packing receiving hole 34, thereby sealing the periphery of the cable 20 through which the annular packing 40 is inserted. At the same time, the cable 20 is fixed to the first cylinder 30.

  That is, when the second stopper surface 54 comes into contact with the first stopper surface 36, the annular packing 40 seals the periphery of the cable 20 and is in an adequately expanded state necessary and sufficient for the cable 20 to be fixed. become.

  Therefore, in the cable support device M according to the present embodiment, the operator who assembles the second cylinder 50 to the first cylinder 30 is simply the second until the second stopper surface 54 comes into contact with the first stopper surface 36. It is only necessary to screw the cylinder 50 into the first cylinder 30, and the degree of adhesion of the annular packing 40 to the cable 20 inserted through the partition wall 10 can be ensured to an appropriate value regardless of skill. As a result, it is possible to suppress the occurrence of inconvenience due to the insufficient degree of adhesion of the annular packing 40, such as a decrease in the supporting force for the cable 20 and a decrease in the sealing performance.

  In the cable support device M of the present embodiment, the second cylinder 50 is moved to the second stopper with the lock nut 60 screwed into the male threaded portion 52 of the second cylinder 50 moved to the standby position Pt. Screw into the first cylinder 30 until the surface 54 contacts the first stopper surface 36. Thereafter, the lock nut 60 located at the standby position Pt is moved to the lock position Pr that comes into contact with the proximal end of the first cylinder 30, so that the coupled state of the second cylinder 50 and the first cylinder 30 is changed. The second stopper surface 54 can be locked in contact with the first stopper surface 36, and the screwing between the second cylinder 50 and the first cylinder 30 is loosened due to external vibration or the like. Can be prevented.

  Further, in the cable support device M of the present embodiment, the first cylindrical body 30 is connected to the connection male screw portion 52 on the peripheral wall of the first hole 33 with the cable 20 inserted therethrough. By screwing on the female screw portion, it can be easily fixed to the partition wall 10. For example, the annular packing 40 and the second cylinder 50 inserted through the cable 20 are assembled to the first cylinder 30 fixed to the partition wall 10 so that the annular packing 40 supports the cable 20. can do.

  Further, in the cable support device M of the present embodiment, the annular packing 40 in the natural state has an axial length dimension L5 that is 1.5 times or more the width dimension t from the inner peripheral surface to the outer peripheral surface. Even when the second cylinder 50 is screwed into the first cylinder 30 and compressed in the axial direction, the axial length can be maintained relatively long. As a result, the axial length of the contact position between the cable 20 and the annular packing 40 can be maintained relatively long, and the fixing force acting on the cable 20 can be improved.

  Next, a second embodiment of the cable support device according to the present invention will be described in detail with reference to FIGS. 9 and 10.

  As shown in FIG. 9, the cable support device Ma of the present embodiment is similar to the cable support device M of the first embodiment, in which the first cylindrical body 30a, the annular packing 40a, the second cylindrical body 50, and the lock nut. 60. The first cylinder 30a, the annular packing 40a, the second cylinder 50, and the lock nut 60 are all basically the same as the corresponding products of the first embodiment. However, the shape of the packing accommodation hole 34a of the first cylinder 30a of the present embodiment and the outer shape of the annular packing 40a are different from those of the first embodiment.

  The packing storage hole 34a of the present embodiment includes a cylindrical hole portion 34s that is a cylindrical hole portion and a reduced diameter hole portion 34t that is a frustoconical hole portion. The reduced diameter hole portion 34t is located on the axis of the cylindrical hole portion 34s on the first hole 33 side of the cylindrical hole portion 34s. The diameter-reduced hole portion 34t gradually decreases in inner diameter as it approaches the first hole 33 side.

  The annular packing 40a of the present embodiment includes a columnar cylindrical body portion 40s and a truncated cone-shaped reduced diameter body portion 40t. The reduced diameter barrel portion 40t is formed on this axis on one side in the direction in which the axis of the cylindrical barrel portion 40s extends. The outer diameter of the reduced diameter barrel portion 40t gradually decreases as the distance from the cylindrical barrel portion 40s increases. The annular packing 40a is also formed with a through-hole 41 that penetrates the positions of the shafts of the cylindrical body 40s and the reduced diameter body 40t.

  The outer diameter of the cylindrical body 40s of the annular packing 40a is slightly smaller than the inner diameter of the cylindrical hole 34s of the packing storage hole 34a. Further, the minimum outer diameter of the reduced diameter barrel portion 40t of the annular packing 40a, that is, the outer diameter of the reduced diameter barrel portion 40t farthest from the cylindrical barrel portion 40s is the diameter of the reduced diameter hole portion 34t of the packing storage hole 34a. The smallest inner diameter, that is, slightly larger than the inner diameter at the position closest to the first hole in the reduced diameter hole portion 34t.

  In the cable support device Ma of the present embodiment, the work procedure until the cable 20 is supported is basically the same as that of the first embodiment. However, when the annular packing 40a is inserted into the packing accommodation hole 34a of the first cylinder 30a, the annular packing 40a is directed toward the packing accommodation hole 34a with the reduced diameter body 40t side of the annular packing 40a being placed in the first cylinder 30a. It inserts in the packing accommodation hole 34a of 30a.

  After the annular packing 40a is put into the packing accommodation hole 34a of the first cylinder 30a, the male screw portion 52 of the second cylinder 50 is screwed into the first cylinder portion 30a female screw hole 35 as in the first embodiment. By screwing in the second cylinder 50 at this time, as shown in FIG. 10, the packing pressing cylinder portion 53 enters the packing accommodation hole 34a, and moves the annular packing 40a in the axial direction. When the annular packing 40a comes into contact with the bottom of the packing accommodation hole 34a, the annular packing 40a is compressed in the axial direction by the packing pressing cylinder portion 53 and bulges in the radial direction. As a result, the end face of the annular packing 40a on the first hole 33 side is in close contact with the bottom of the packing accommodation hole 34a. Further, the outer peripheral surface of the reduced diameter barrel portion 40 t and the outer peripheral surface of the cylindrical barrel portion 40 s of the annular packing 40 a are in close contact with the inner peripheral surface of the packing storage hole 34 a, and the inner peripheral surface of the annular packing 40 a is the outer peripheral surface of the cable 20. In close contact.

  Thereafter, as in the first embodiment, when the lock nut 60 is moved from the standby position Pt to the lock position Pr and the screwed state between the female screw hole 35 and the male screw portion 52 is locked, all the operations are completed. .

  In the present embodiment, as described above, the diameter-reduced body 40t side whose outer diameter is reduced in the annular packing 40a is directed to the packing accommodation hole 34a, and this annular packing 40a is connected to the female screw hole of the first cylinder 30a. Since it is put into the packing accommodation hole 34a via 35, it becomes easy to put this annular packing 40a into the packing accommodation hole 34a.

  Moreover, in this embodiment, since the contact pressure between the outer peripheral surface of the annular packing 40a and the inner peripheral surface of the packing storage hole 34a increases, the sealing property between the outer peripheral surface of the annular packing 40a and the inner peripheral surface of the packing storage hole 34a. Can be increased. In the first embodiment, the contact pressure between the outer peripheral surface of the annular packing 40 and the inner peripheral surface of the packing storage hole 34 is determined by the radial elastic force generated by the axial compression of the annular packing 40. In the present embodiment, the inner peripheral surface of the reduced diameter hole portion 34t of the packing storage hole 34a is inclined with respect to the axial direction and spreads in a direction having a component perpendicular to the axial direction. A component of axial force by the packing pressing cylinder portion 53 of the second cylinder 50 is applied to the inner peripheral surface of the portion 34t via the annular packing 40a. Therefore, in the present embodiment, the contact pressure between the outer peripheral surface of the annular packing 40a and the inner peripheral surface of the packing storage hole 34a is the component force of the axial force generated by the packing pressing cylinder portion 53 on the elastic force of the annular packing 40a. It depends on the force applied. Therefore, in this embodiment, as mentioned above, the contact pressure between the outer peripheral surface of the annular packing 40a and the inner peripheral surface of the packing storage hole 34a increases.

  In addition, as the attachment method to the partition 10 of the cable support apparatus M and Ma of the above embodiment, you may perform as follows, for example. Before screwing the first cylinders 30 and 30a to the partition wall 10, the annular packings 40 and 40a are assembled to the first cylinders 30 and 30a through which the cable 20 is inserted, and the female screws of the first cylinders 30 and 30a are assembled. A temporary assembly state in which the second cylindrical body 50 is screwed into the hole 35 to such an extent that the annular packings 40, 40a are not compressed. Next, after the first cylindrical bodies 30 and 30a in the temporarily assembled state are screwed onto the connecting female screw portions on the partition wall 10, the second cylindrical body 50 is attached to the first cylindrical bodies 30 and 30a. You may make it a regular assembly state by screwing.

  The cable support device of the present invention is not limited to the above-described embodiment, and appropriate modifications and improvements can be made without departing from the gist of the present invention. For example, the first cylinders 30 and 30a may be fixed to the partition wall 10 by welding or the like instead of being screwed.

  10: partition wall, 12: female thread portion for connection, 20: cable, 30, 30a: first cylinder, 31: first through hole portion, 33: first hole, 34, 34a: packing accommodation hole, 34s: Cylindrical hole, 34t: reduced diameter hole, 35: female screw hole, 36: first stopper surface, 38: male screw part for connection, 40, 40a: annular packing, 40s: cylindrical body, 40t: reduced diameter Body: 41: Through hole, 50: Second cylinder, 51: Coupling cylinder, 52: Male thread part, 53: Packing pressing cylinder, 54: Second stopper surface, 60: Lock nut, Ia: Inside Space, Oa: Outer space, M, Ma: Cable support device, Pr: Lock position, Pt: Standby position

Claims (6)

A first cylinder that is provided in a partition wall that divides the space into a first space and a second space, communicates the first space and the second space, and has a first through-hole portion through which a cable is inserted. When,
A second screw through which the cable is inserted when the first through hole portion of the first cylinder is screwed to a part of the first cylindrical body and is screwed to the first cylinder. A second cylinder in which a through-hole portion is formed;
An annular packing formed of an elastic material and having a through hole through which the cable is inserted;
With
In the first through hole portion of the first cylindrical body,
A first hole whose tip is open to the first space and into which the cable can be inserted;
A packing receiving hole that is coaxially connected to the first hole at the base end of the first hole, and whose inner diameter is larger than the first hole;
A female screw hole that is concentrically connected to the first hole at the base end of the packing receiving hole located on the opposite side of the first hole and opens into the second space with an inner diameter larger than the packing receiving hole,
A first stopper surface projecting radially from the base end of the packing receiving hole due to an inner diameter difference between the packing receiving hole and the female screw hole;
Formed,
The annular packing has an outer diameter larger than an inner diameter of the first hole and smaller than an inner diameter of the packing accommodation hole so that the outer diameter can be accommodated in the packing accommodation hole.
In the second cylinder,
A coupling cylinder portion formed on the outer periphery of a male screw portion screwed into the female screw hole;
The coupling tube portion projects from the first space side tip to the first space side, has a cylindrical shape coaxial with the coupling tube portion, and the screwing amount of the male screw portion into the female screw hole is constant. A packing pressing cylinder portion that enters the packing housing hole when exceeding a value and compresses the annular packing in the packing housing hole in the axial direction;
A second stopper surface that projects in a radial direction from a base end portion of the packing pressing cylinder portion and abuts against the first stopper surface when the entire length of the packing pressing cylinder portion is immersed in the packing accommodation hole;
Formed,
The amount of protrusion from the second stopper surface in the packing pressing cylinder portion is such that when the second stopper surface is in contact with the first stopper surface, the annular packing in the packing receiving hole is moved to the first space side. An amount that can be crushed by a predetermined amount.
A cable support device. The cable support device according to claim 1,
A lock nut screwed into the male thread portion of the second cylinder,
The male screw portion separates the lock nut from the base end of the first cylindrical body in a state where the second stopper surface is in contact with the first stopper surface by screwing the male screw portion into the female screw hole. A screwing allowance that is movable between the standby position and a lock position that contacts the proximal end of the first cylinder,
A cable support device. The cable support device according to claim 1 or 2,
The first cylindrical body is formed with a partition fixing portion that penetrates the partition and is fixed to the partition.
A cable support device. The cable support device according to claim 3, wherein
The partition fixing portion is a male screw portion for connection formed on the outer peripheral side of the first hole in the first cylinder.
A cable support device. In the cable support device according to any one of claims 1 to 4,
The packing storage hole has a reduced diameter hole portion that gradually decreases in inner diameter as it approaches the first hole,
The annular packing has a reduced diameter body portion that gradually decreases in outer diameter as it approaches one side of the direction through which the through hole passes.
A cable support device. In the cable support apparatus as described in any one of Claim 1 to 5,
The annular packing has a cylindrical structure, and an axial length dimension is 1.5 times or more a width dimension from an inner peripheral surface to an outer peripheral surface.

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