JP2020045936A - Cable seal structure - Google Patents

Abstract

To provide a cable seal structure capable of sealing a portion that multiple cables penetrate, at a high sealing degree.SOLUTION: A cable seal structure comprises: a ground packing 1; an accommodation part 2 including an accommodation space 23 capable of accommodating the ground packing 1 therein; a plug part 3 including a projection 33 to be fitted into the accommodation space 23; and fastening structures 25, 35 and 36 capable of fastening and fixing the accommodation part 2 and the plug part 3 in an axial direction of the accommodation space 23 in a state where the ground packing 1 and the projection 33 of the plug part 3 are accommodated in the accommodation space 23 successively from the depth. The ground packing 1 includes multiple first cable insertion holes 11. The accommodation part 2 includes multiple second cable insertion holes 24 corresponding to the multiple first cable insertion holes 11 on an inner surface 22a closing one end of the accommodation space 23. The plug part 3 includes multiple third cable insertion holes corresponding to the multiple first cable insertion holes 11 on a tip end face 33a of the projection 33.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cable seal structure.

  Conventionally, as a sealing structure for a single cable, for example, a cable clamp device disclosed in Patent Document 1 is known.

  This cable clamp device includes a control box having a hole provided with one cable insertion hole at one end, a rubber packing having one cable insertion hole inserted into the hole, and a rubber packing inserted into the hole. And a clamp body provided with a cylindrical portion having two cable insertion holes. Then, with one cable inserted into each one cable insertion hole, the rubber packing and the cylindrical portion of the clamp body are sequentially inserted into the holes of the control box, and the control box and the clamp body are fastened. . Thereby, the portion of the cable clamp device through which the cable passes is sealed by the rubber packing.

  As a seal structure for a plurality of cables, a commercially available multi-connector as shown in FIGS. 7 and 8 is known. FIG. 7 is an exploded view showing an example of the structure of a commercially available multi-connector. FIG. 8 is an external view showing a state where the multi-connector of FIG. 7 is assembled. In FIG. 8, only three of the six cables are shown for easy viewing. In addition, hereinafter, for convenience, the left direction and the right direction in FIGS. 7 and 8 are described as a front direction and a rear direction, respectively.

  Referring to FIG. 7, this multi-connector 200 includes a gland packing 201, a main body 202, a cap nut 203, a sleeve 204, an O-ring 205, and a lock nut 206. In the gland packing 201, for example, six cable insertion holes 201a are formed. The main body 202, the cap nut 203, the sleeve 204, the O-ring 205, and the lock nut 206 are formed in an annular shape.

  Referring to FIG. 8, in the multi-connector 200, for example, six cables are sequentially inserted through the cap nut, the sleeve 204, the gland packing 201, the main body 202, the O-ring 205, and the lock nut 206. Then, the sleeve 204 is accommodated in the inner space of the cap nut 203. The outer peripheral surface of the rear part of the gland packing 201 is inclined rearward, and the inner peripheral surface of the sleeve 204 is also inclined rearward. Then, the rear part of the gland packing 201 is accommodated in the sleeve 204. Thereafter, the cap nut 203 is screwed into a male screw portion 202c formed on the outer peripheral surface of the rear portion of the main body 202. Thereby, the front part of the gland packing 201 is accommodated in the internal space 202a on the rear side of the main body 202. In the rear inner space 202a, a step surface 202b perpendicular to the inner peripheral surface of the internal space 202a is formed, and the outer peripheral portion of the front end surface of the gland packing 201 comes into contact with the step surface 202b. When the cap nut 203 is screwed into the main body 2, the gland packing 201 is fixed to the inner peripheral surface of the sleeve 204 with the front portion restrained by the inner peripheral surface of the internal space 202 a of the main body 202. The pressing member 202 is pressed in the axial direction by the step surface 202b. As a result, the gland packing 201 tightens the cable, thereby sealing the portion of the multi-connector 200 through which the cable passes.

  Thereafter, the O-ring 205 is fitted into a male screw portion 202d formed on the outer peripheral surface of the front portion of the main body 202, and then the lock nut 206 is screwed to the male screw portion 202d of the main body 202.

Japanese Patent Application Laid-Open No. 2002-145595

  By the way, some cables are used for explosion proof. When sealing an explosion-proof cable, a higher degree of sealing (Degree of sealing) is required as compared with a normal sealing structure. From the viewpoint of explosion proof, the conventional multi-connector 200 has the following problems.

  In the multi-connector 200, with the front part of the gland packing 201 restrained by the inner circumference of the inner space 202 a of the main body 202, the outer circumference of the gland packing 201 is formed by the inner circumference of the sleeve 204 and the stepped surface 202 b of the main body 202. The portion 201b of the gland packing 201 between the (six) cable insertion holes 201a is not pressed at all. Therefore, the central portion of the gland packing 201 escapes in the axial direction and expands. As a result, the gland packing 201 cannot strongly tighten the individual cables, and a portion of the multi-connector 200 through which a plurality of cables penetrate cannot be sealed with a high degree of sealing.

  The present invention has been made to solve the above-described problem, and has as its object to provide a cable seal structure that can seal a portion through which a plurality of cables penetrate with a high degree of sealing.

  In order to achieve the above object, a cable seal structure according to an aspect of the present invention has a columnar gland packing and a columnar gland closed at one end and opened at the other end, and capable of accommodating the gland packing. An accommodating portion having an accommodating space, a plug portion having a columnar projection fitted into the accommodating space, and the accommodating portion accommodating the gland packing and the protruding portion of the stopper portion in the accommodating space in order from the back. And a fastening structure capable of fastening and fixing the plug and the plug portion in the axial direction of the housing space, wherein the gland packing penetrates the gland packing in the axial direction and inserts a plurality of cables. A plurality of first cable insertion holes are provided, and the housing portion corresponds to the plurality of first cable insertion holes on an inner surface closing the one end of the housing space, and Has a plurality of second cable insertion holes through which the plurality of cables can be inserted respectively in the axial direction of the housing space, and the plug portion has a plurality of the second There are a plurality of third cable insertion holes respectively corresponding to one cable insertion hole, penetrating the plug portion in the axial direction of the projection, and capable of inserting the plurality of cables respectively.

  According to this configuration, the gland packing has the plurality of first cable insertion holes, and the housing portion has, on the inner surface closing one end of the housing space, the plurality of second cables respectively corresponding to the plurality of first cable insertion holes. Since the plug portion has an insertion hole and the plug portion has a plurality of third cable insertion holes respectively corresponding to the plurality of first cable insertion holes on the distal end surface of the projection, the ground is sequentially placed in the accommodation space of the accommodation portion from the back. The housing and the plug are fastened in the axial direction of the housing space by the fastening structure in a state where the packing and the protrusion of the plug are housed, and a plurality of cables are respectively inserted through the plurality of first to third cable insertion holes. When the gland packing is confined to the inner peripheral surface of the housing space of the housing portion in the radial direction, the gland packing is axially closed by the inner surface closing one end of the housing space of the housing portion and the tip end surface of the projection of the plug portion. Compressed into That. At this time, a portion located between the plurality of first cable insertion holes on both end surfaces of the gland packing is also a portion located between the plurality of second cable insertion holes on the inner surface closing one end of the housing portion, and a plug portion. And a portion located between the plurality of third cable insertion holes on the distal end surface of the projection. Therefore, the gland packing is compressed as a whole without any escape, so that each (individual) cable is strongly tightened as compared with the conventional example in which the central portion of the gland packing escapes in the axial direction. As a result, a portion through which each cable penetrates in the cable seal structure can be sealed with a high degree of sealing.

  Both end surfaces of the gland packing are planes perpendicular to the axial direction of the gland packing, and the inner surface closing one end of the accommodation space of the accommodation part is a plane perpendicular to the axial direction of the accommodation space, The tip surface of the projection of the plug may be a plane perpendicular to the axial direction of the projection.

  According to this configuration, since the gland packing can be uniformly compressed, a portion of the cable sealing structure through which each cable passes can be sealed with a higher degree of sealing.

  The accommodating portion is formed in a tubular shape having an internal space that constitutes the accommodating space, and the plug portion has an annular shape corresponding to an annular distal end surface of a peripheral wall of the tubular accommodating portion around the protrusion. May be provided.

  According to this configuration, the housing portion and the plug portion can be tightened until the annular distal end surface of the peripheral wall of the housing portion and the annular flat surface of the flange portion of the plug portion come into contact with each other. The portion through which the cable passes can be sealed with a higher degree of sealing.

  The housing part and the plug part may be a single housing member and a plug member, respectively.

  According to this configuration, the cable seal structure is simplified.

  ADVANTAGE OF THE INVENTION This invention produces the effect that the part which several cables penetrate can be provided with the cable sealing structure which can seal with high sealing degree.

FIG. 1 is an exploded sectional view showing an example of the configuration of the cable seal structure according to Embodiment 1 of the present invention. 2A and 2B are diagrams illustrating the configuration of the gland packing of FIG. 1, wherein FIG. 2A is a diagram viewed from a direction perpendicular to the axis, and FIG. 2B is a diagram viewed from the direction in which the axis extends. . FIG. 3 is a sectional view showing a state where the cable seal structure of FIG. 1 is assembled. FIG. 4 is a perspective view showing an appearance during the assembly of the cable seal structure of FIG. FIG. 5 is a cross-sectional view showing a state where the cable is clamped in the cable seal structure of FIG. FIG. 6 is a cross-sectional view illustrating an example of a configuration of the cable seal structure according to the second embodiment of the present invention. FIG. 7 is an exploded view showing an example of the structure of a commercially available multi-connector. FIG. 8 is an external view showing a state where the multi-connector of FIG. 7 is assembled.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the following, the same or corresponding elements are denoted by the same reference symbols throughout the drawings, and redundant description will be omitted. In addition, the following drawings are diagrams for explaining the present invention, and when elements unrelated to the present invention are omitted, when dimensions are inaccurate due to exaggeration, etc., in order to make the drawings easy to see. When simplification is performed by omitting elements, there are cases where a plurality of figures do not match each other.

  Further, the present invention is not limited to the following embodiments.

(Embodiment 1)
[Constitution]
FIG. 1 is an exploded sectional view showing an example of the configuration of the cable seal structure according to Embodiment 1 of the present invention. 2A and 2B are diagrams illustrating a configuration of the gland packing of FIG. 1, wherein FIG. 2A is a diagram viewed from a direction perpendicular to an axis, and FIG. 2B is a diagram viewed from a direction in which the axis extends. . FIG. 3 is a sectional view showing a state where the cable seal structure of FIG. 1 is assembled. FIG. 4 is a perspective view showing an appearance during the assembly of the cable seal structure of FIG. In FIGS. 1 and 3 and FIGS. 5 and 6, which will be described later, a line defining the inner peripheral surface of the chamfered portion of the housing portion 2 is omitted for easy viewing. FIGS. 1 and 3 and FIGS. 5 and 6, which will be described later, show that the cable 41 includes the gland packing 1, the housing 2, and the plug 3 (in FIG. The first holding plate 71 and the second holding plate 81) are drawn so as to pass through the central portions thereof.

  Referring to FIG. 1, the cable seal structure 100 of the present embodiment includes a gland packing 1, a housing 2, and a plug 3. Hereinafter, these elements will be described in detail.

<Gland packing 1>
Referring to FIGS. 1 and 2, the gland packing 1 is formed in a column shape. In other words, the gland packing 1 may have a shape extending in the axial direction. A plurality (two in this case) of first cable insertion holes 11 are formed on both end surfaces 1a and 1b of the gland packing 1 so as to penetrate the gland packing 1 in the axial direction. Each of the plurality of first cable insertion holes 11 is formed so that a plurality of cables 41 can be inserted. Here, both end surfaces 1 a and 1 b of the gland packing 1 are planes perpendicular to the axial direction of the gland packing 1.

  Here, the gland packing 1 is formed in a short columnar shape. The gland packing 1 is made of an elastic material, for example, rubber. An annular groove is formed in the center of the gland packing 1 in the circumferential direction. This groove is for facilitating uniform compression of the gland packing, and may be omitted.

<Housing part 2>
Referring to FIGS. 1, 3 and 4, the housing portion 2 is closed at one end (here, the rear end), is open at the other end (here, the front end), and has a columnar housing capable of housing the gland packing 1. It has a space 23. A plurality of second cable insertion holes 24 that penetrate the housing portion 2 in the axial direction of the housing space 23 are formed in the inner surface 22 a that closes the one end of the housing space 23. When the gland packing 1 is accommodated in the accommodating space 23 of the accommodating portion 2, the plurality of second cable insertion holes 24 are portions of the accommodating portion 2 corresponding to the plurality of first cable insertion holes 11 of the gland packing 1 ( In other words, a plurality of cables 41 are formed so as to be able to be inserted into the accommodation space 23 at positions on the inner surface 22a that close the one end (the rear end). The inner surface 22a is a plane perpendicular to the axial direction of the housing space 23 here.

  Here, the housing portion 2 is configured by a short bottomed cylindrical housing member having one end (rear end) closed and the other end (front end) opened. The internal space of the housing member forms the housing space 23. The plurality of cable insertion holes 24 are formed on the inner surface (bottom surface) 22 a of the bottom wall (rear end wall) 22 of the housing member, respectively, so as to penetrate the bottom wall 22.

  Further, a plurality of fastening screw holes 25 extending in the axial direction of the housing space 23 are formed in the outer peripheral portion of the housing portion 2 (peripheral wall portion of the housing member).

  The material of the storage section 2 is not particularly limited. The housing 2 is made of a plastic resin, metal or the like.

  As shown in FIG. 4, the accommodation portion 2 is formed in a short quadrangular prism shape at a rear end portion, and holes are formed at four corners, respectively. It is intended to be fixed to a fixed object with a screw.

<Plug part 3>
Referring to FIGS. 1, 3, and 4, the plug 3 has a columnar protrusion 33 that fits into the storage space 23 of the storage 2. A plurality of third cable insertion holes 34 that penetrate the plug 3 in the axial direction of the projection 33 are formed in the distal end surface 33 a of the projection 33. The plurality of third cable insertion holes 34 correspond to the plurality of first cable insertion holes 11 of the gland packing 1 when the gland packing 1 and the protrusion 33 are sequentially housed in the housing space 23 of the housing 2 from the back. The plurality of cables 41 are formed so as to be able to be inserted into portions of the plug portion 3 (in other words, positions on the distal end surface 33a of the protruding portion 33). Here, a flange portion 31 having an annular flat surface 31 a corresponding to the annular distal end surface of the peripheral wall of the cylindrical housing portion 2 is formed around the protrusion 33. Here, the tip surface 33a of the projection 33 is a plane perpendicular to the axial direction of the projection 33.

  Here, the plug portion 3 is configured by a short-bottomed cylindrical plug member having one end (rear end) closed and the other end (front end) opened. The short columnar projection 33 is formed at the center of the outer surface of the bottom wall 32 of the plug member, and the portion of the outer surface of the bottom wall 32 around the projection 33 constitutes the above-mentioned annular flat surface 31a. Each of the plurality of cable insertion holes 24 is formed to penetrate the bottom wall 32 of the plug member.

  A plurality of fastening screw insertion holes 35 extending in the axial direction of the projection 33 are formed in the outer peripheral portion of the plug portion 3 (the peripheral wall portion of the plug member). When the gland packing 1 and the protrusion 33 are sequentially housed in the housing space 23 of the housing 2 from the back, the plurality of fastening screw insertion holes 35 are formed by the plurality of fastenings formed in the housing 2 in the plug 3. The hole is formed in a portion corresponding to the screw hole 25 for use.

  The material of the plug 3 is not particularly limited. The plug 3 is made of a plastic resin, metal, or the like.

<Fastening structure>
The fastening structure is such that the housing 2 and the plug 3 are fastened in the axial direction of the housing space 23 in a state where the gland packing 1 and the protrusion 33 of the plug 3 are housed in the housing space 23 of the housing 2 in order from the back. It is configured to be able to be fixed.

  Here, the fastening structure includes a plurality of fastening screw holes 25 provided on the outer peripheral portion of the housing portion 2, a plurality of fastening screw insertion holes 35 provided on the outer peripheral portion of the plug portion 3, and a plurality of fastening screws. And a screw 36.

[how to use]
Next, a method of using the cable seal structure 100 configured as described above will be described.

<Assembly>
First, the assembly of the cable seal structure 100 will be described.

  As shown in FIGS. 3 and 4, first, a plurality of (two in this case) cables 41 are inserted through the housing 2, the gland packing 1, and the plug 3 in this order.

  Next, the gland packing 1 is inserted into the accommodation space 23 of the accommodation part 2. As a result, the gland packing 1 is accommodated in the accommodation space 23 such that the rear end surface 1a is in contact with the inner surface 22a of the accommodation space 23.

  Next, the protrusion 3 of the stopper 3 is inserted into the housing space 23 of the housing 2. As a result, the projection 33 of the plug 3 is accommodated in the accommodation space 23 such that the front end surface 33a contacts the front end surface 1b of the gland packing 1.

  Next, the plurality of fastening screws 36 are respectively inserted into the plurality of fastening screw insertion holes 35 of the plug portion 3 and screwed into the plurality of fastening screw holes 25 of the housing portion 2. Thereby, the housing part 2 and the stopper part 3 are tightened in the axial direction of the housing space 23.

  Then, in a state where the gland packing 1 is restrained in the radial direction by the inner peripheral surface of the housing space 23 of the housing portion 2, the inner surface 22 a for closing one end (rear end) of the housing space 23 of the housing portion 2 and the plug portion 3. And the distal end surface 33a of the projection 33 is compressed in the axial direction. At this time, the portions 12 (see FIG. 2) of the both end surfaces 1 a and 1 b of the gland packing 1 located between the plurality of first cable insertion holes 11 also include the plurality of second surfaces 22 a of the inner surface 22 a closing one end of the housing portion 2. It is pressed by a portion located between the cable insertion holes 24 and a portion 33b (see FIG. 4) located between the plurality of third cable insertion holes 34 on the distal end surface 33a of the projection 33 of the plug portion 3. Therefore, the gland packing 1 is entirely compressed without any escape. Therefore, each cable 41 is strongly tightened. As a result, a portion of the cable seal structure 100 through which each cable 41 penetrates can be sealed with a high degree of sealing.

  Next, as shown in FIG. 3, the plurality of fastening screws 35 are respectively screwed into the fastening screw holes 25 of the housing portion 2.

  As described above, according to the cable seal structure 100 of the present embodiment, a portion of the cable seal structure 100 through which each cable 41 passes can be sealed with a high degree of sealing.

  Further, both end surfaces 1 a and 1 b of the gland packing 1 are planes perpendicular to the axial direction of the gland packing 1, and an inner surface 22 a that closes one end of the housing space 23 of the housing 2 is formed in the axial direction of the housing space 23. And the tip surface 33a of the projection 33 of the plug 3 is a plane perpendicular to the axial direction of the projection 33, so that the gland packing can be uniformly compressed, The portion through which the cable 41 passes can be sealed with a higher degree of sealing.

  Further, the housing portion 2 is formed in a cylindrical shape having an internal space forming the housing space 23, and the stopper portion 3 is provided around the protrusion 33 at a position corresponding to the annular distal end surface of the peripheral wall of the cylindrical housing portion 2. Since the flange portion 31 having the annular flat surface 31a is formed, the housing portion 2 and the plug portion 3 are brought into contact with the annular distal end surface of the peripheral wall of the housing portion 2 and the flange portion 31 annular surface 31a of the plug portion 3. The portion through which each cable 41 in the cable seal structure 100 penetrates can be sealed with a higher degree of sealing.

  Moreover, since the housing part 2 and the stopper part 3 are a single housing member and a stopper member, respectively, the cable seal structure 100 is simplified.

  Such a cable seal structure of the present embodiment can be applied to, for example, explosion-proof.

<Cable clamp>
Next, the clamp means of the cable 41 in the cable seal structure 100 assembled as described above will be described.

  FIG. 5 is a sectional view showing a state where the cable 41 is clamped in the cable seal structure 100 of FIG. In FIG. 5, reference numerals of elements mainly related to the clamp of the cable 41 are shown for easy viewing, and reference numerals of other elements are shown except for reference numerals 1 to 3. Absent.

  Referring to FIG. 5, a clamp unit for the cable 41 is provided, for example, for each cable 41. Each clamping means includes a clamping member 51, a first clamping screw 61, and a second clamping screw 62.

  The clamp member 51 is formed in a substantially C-shape. A first clamp screw insertion hole 54 is formed at one end, and a first clamp screw hole 53 is formed at the other end. The first clamp screw insertion hole 54 and the first clamp screw hole 53 are provided to face each other with a gap between the C-shaped clamp members interposed therebetween. Before the cable seal structure 100 is assembled, the cable 41 is inserted into the clamp member 51 in advance. Then, after the cable seal structure 100 is assembled, the first clamping screw 61 is inserted into the first clamping screw insertion hole 54 and screwed into the first clamping screw hole 53. Thereby, the clamp member 51 is fastened to the cable 41. On the other hand, a second clamp screw insertion hole 55 is formed on the rear side (right side in the drawing) of the clamp member 51. Further, a second clamp screw hole 56 corresponding to the second clamp screw insertion hole 55 of the clamp member 51 is formed at an appropriate position on the bottom wall 22 of the housing portion 2.

  The second clamp screw insertion hole 55 of the clamp member 51 fastened to the cable 41 as described above is aligned with the second clamp screw hole 56 of the housing portion 2, and then the second clamp screw 62 is It is inserted into the screw hole 55 for clamping and screwed into the screw hole 56 for second clamping. As a result, the cable 41 is clamped to the housing 2.

(Embodiment 2)
Embodiment 2 of the present invention shows an example of a mode in which the accommodation section 2 and the plug section 3 are each composed of a plurality of (here, two) members. The second embodiment differs from the first embodiment in the following points, and the other points are the same as the first embodiment. Hereinafter, this difference will be described.

  FIG. 6 is a cross-sectional view illustrating an example of a configuration of the cable seal structure according to the second embodiment of the present invention.

  Referring to FIG. 6, in the cable seal structure 101 of the present embodiment, the housing portion 2 includes the housing member 20 and the first holding plate 71, and the plug portion 3 includes the plug member 30 and the second holding plate 81. And

  The housing member 20 is formed in a short bottomed cylindrical shape. A sixth cable insertion hole 28 through which all the cables 41 can be inserted collectively is formed in the bottom wall 26 of the housing member 20.

  The first holding plate 71 is formed in a disk shape having a diameter that fits into the cylindrical housing space 23 of the housing member 20. The thickness and material of the first holding plate 71 are selected so as to have a strength capable of compressing the gland packing 1 in a state where the cable seal structure 101 is assembled.

  The first holding plate 71 is provided with a plurality of fourth cable insertion holes 72 through which the plurality of cables 41 can be inserted. The plurality of fourth cable insertion holes 72 correspond to the plurality of first cable insertion holes 11 of the gland packing 1 in the first holding plate 71 in a state where the first holding plate 71 is fitted to the rear end surface 1a of the gland packing 1. It is provided in the part which does. The first holding plate 71 is made of, for example, a plastic resin, metal, or the like.

  The plug member 30 is formed in a short bottomed cylindrical shape. The bottom wall 37 of the plug member 30 has a seventh cable insertion hole 38 through which all the cables 41 can be inserted collectively.

  The second holding plate 81 is formed in a disk shape having a diameter that fits into the cylindrical housing space 23 of the housing member 20. The thickness and material of the second holding plate 81 are selected so as to have a strength capable of compressing the gland packing 1 in a state where the cable seal structure 101 is assembled.

  The second holding plate 81 is provided with a plurality of fifth cable insertion holes 82 through which the plurality of cables 41 can be inserted. The plurality of fifth cable insertion holes 82 respectively correspond to the plurality of first cable insertion holes 11 of the ground packing 1 in the second holding plate 81 in a state where the second holding plate 81 is fitted to the front end face 1b of the gland packing 1. It is provided in the part which does. The second holding plate 81 is made of, for example, plastic resin, metal, or the like.

  The cable seal structure 101 thus configured is assembled as follows.

  Referring to FIG. 6, first, a plurality of (two in this case) cables 41 are sequentially inserted through the housing portion 2, the first holding plate 71, the gland packing 1, the second holding plate 81, and the plug portion 3. .

  Next, the first holding plate 71 is inserted into the storage space 23 of the storage member 20. Thereby, the first holding plate 71 is accommodated in the accommodation space 23 such that the rear main surface is in contact with the inner surface of the bottom wall 26 of the accommodation member 20.

  Next, the gland packing 1 is inserted into the accommodation space 23 of the accommodation member 20. As a result, the gland packing 1 is accommodated in the accommodation space 23 such that the rear end surface 1a contacts the front main surface of the first holding plate 71.

  Next, the second holding plate 81 is fitted into the storage space 23 of the storage member 20. As a result, the second holding plate 81 is accommodated in the accommodation space 23 such that the rear main surface is in contact with the front end surface 1b of the gland packing 1.

  Next, the outer surface of the bottom wall 37 of the plug member 30 contacts the front main surface of the second holding plate 81.

  Next, the plurality of fastening screws 36 are respectively inserted into the plurality of fastening screw insertion holes 35 of the plug portion 3 and screwed into the plurality of fastening screw holes 25 of the housing portion 2. Thereby, the housing member 20 and the plug member 30 are fastened in the axial direction of the housing space 23.

  According to the second embodiment, the same effects as those of the first embodiment can be obtained.

  Note that, in the cable seal structure 101 of the present embodiment, a plurality of cables 41 are clamped similarly to the cable seal structure 100 of the first embodiment. Referring to FIGS. 5 and 6, in this case, the shape of each clamp member 51 is appropriately modified so that it can be fixed to the rear end surface of the housing member 20.

(Other embodiments)
In Embodiments 1 and 2, instead of the fastening structure using screws, an appropriate screwing structure that is screwed to the housing portion 2 and the plug portion 3 may be provided as the fastening structure. A well-known screwing structure can be used.

  In the first and second embodiments, the housing member 2 includes the protrusion 33 and the flange 31 as essential parts, and other parts may be omitted.

  From the above description, many modifications and other embodiments are apparent to one skilled in the art. Therefore, the above description should be construed as illustrative only.

  INDUSTRIAL APPLICABILITY The cable seal structure of the present invention is useful as a cable seal structure capable of sealing a portion through which a plurality of cables penetrate with a high degree of sealing.

REFERENCE SIGNS LIST 1 gland packing 1 a rear end face 1 b front end face 2 housing part 3 stopper part 11 first cable insertion hole 12 part between first cable insertion holes 20 housing member 22 bottom wall 22 a inner surface 23 housing space 24 second cable insertion hole 25 fastening Screw hole 26 Bottom wall 28 Sixth cable insertion hole 30 Plug member 31 Flange portion 31a Annular plane 32 Bottom wall 33 Projection 33a Tip surface 34 Third cable insertion hole 35 Fastening screw insertion hole 36 Fastening screw 37 Bottom wall 38 Seventh cable insertion hole 41 Cable 51 Clamp member 53 First clamping screw hole 54 First clamping screw insertion hole 55 Second clamping screw insertion hole 56 Second clamping screw hole 61 First clamping screw 62 Second Clamping screw 71 First holding plate 72 Fourth cable insertion hole 81 Second holding plate 82 Fifth cable insertion hole 100 Cable seal structure 01 cable seal structure

Claims (4)

With columnar gland packing,
One end is closed, the other end is open, and a housing portion having a columnar housing space capable of housing the gland packing,
A plug having a columnar protrusion fitted into the housing space,
A fastening structure capable of fastening and fixing the housing portion and the plug portion in the housing space in the axial direction with the gland packing and the protrusion of the plug portion housed in the housing space in order from the back. ,
The gland packing has a plurality of first cable insertion holes that respectively penetrate the gland packing in the axial direction and can insert a plurality of cables,
The accommodating portion corresponds to the plurality of first cable insertion holes on an inner surface closing the one end of the accommodating space, respectively, penetrates the accommodating portion in the axial direction of the accommodating space, and Has a plurality of second cable insertion holes, each of which can be inserted,
The plug portion corresponds to the plurality of first cable insertion holes, respectively, at the distal end surface of the protrusion, penetrates the plug portion in the axial direction of the protrusion, and can insert the plurality of cables respectively. A cable seal structure having a plurality of third cable insertion holes. Both end surfaces of the gland packing are planes perpendicular to the axial direction of the gland packing,
An inner surface closing the one end of the accommodation space of the accommodation part is a plane perpendicular to the axial direction of the accommodation space,
The cable seal structure according to claim 1, wherein a tip end surface of the projection of the plug portion is a plane perpendicular to an axial direction of the projection. The housing portion is formed in a tubular shape having an internal space that configures the housing space,
3. The cable seal structure according to claim 1, wherein the plug portion has a flange portion around the protrusion having an annular flat surface corresponding to an annular distal end surface of a peripheral wall of the cylindrical housing portion. 4.   The cable sealing structure according to any one of claims 1 to 3, wherein the housing portion and the plug portion are a single housing member and a plug member, respectively.

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