CN109428295B

CN109428295B - Cable stuffing box

Info

Publication number: CN109428295B
Application number: CN201810955728.8A
Authority: CN
Inventors: 前迫义幸
Original assignee: Denka Electron Co ltd
Current assignee: Denka Electron Co ltd
Priority date: 2017-08-21
Filing date: 2018-08-21
Publication date: 2021-08-10
Anticipated expiration: 2038-08-21
Also published as: CN109428295A; WO2019037709A1; JP2019037094A; JP6886892B2

Abstract

The invention provides a cable stuffing box which can be installed in a one-touch manner and can obtain higher waterproofness. A cable stuffing box (1) is provided with: a substrate (11) that faces a first surface of an object to be mounted; a cable holding section (12, 20, 30) provided on one side of the substrate and capable of holding the inserted cable; a main body mounting part (13) which is provided on the other side of the substrate and has a plurality of engaging pieces (130) which can engage with a second surface on the opposite side of the first surface of the mounting object; and an annular packing (40) in which, with respect to the engagement piece (130) of the main body attachment portion (13), a plurality of stepped portions that can be engaged with the second surfaces of attachment objects having different thicknesses are provided in a stepped manner along the direction of penetration of the cable in the main body attachment portion (13), the packing (40) being formed so that the elastic modulus of a region on the attachment object side is lower than that of a region on the substrate (11) side.

Description

Cable stuffing box

Technical Field

The invention relates to a cable gland (ケーブルグランド).

Background

In industrial robots, vehicles, ships, aircrafts, plant facilities, and the like, cable stuffing boxes are attached to cable outlets of instruments (panels, etc.) and structures (walls, etc.). The cable stuffing box has the following functions: water, oil, dust, and the like are prevented from entering the cable insertion opening, and the cable is prevented from slackening due to vibration, being pulled, and being displaced. Conventionally, the following method has been used for fixing a stuffing box of a cable: after the stuffing box body is attached to the cable outlet, a locknut is fitted to a screw portion protruding on the opposite side of the cable outlet, and is screwed with a tool (see, for example, patent document 1).

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open No. 2000-151176

Disclosure of Invention

Problems to be solved by the invention

Since the conventional cable stuffing box has a structure in which the locknut is screwed and attached, an operator is required to attach the stuffing box body to the opposite side (for example, the opposite side to the iron plate of a ship or the like) so that the stuffing box body and the locknut do not rotate together. Therefore, the conventional cable stuffing box has a problem that installation takes time, labor cost, and the like.

The invention aims to provide a cable stuffing box which can be installed in a one-touch mode and can obtain higher waterproofness.

Means for solving the problems

The present invention relates to a cable stuffing box which is installed in an opening of an installation object and holds a cable inserted into the cable stuffing box, and the cable stuffing box comprises: a substrate facing a first surface of the mounting object; a cable holding portion provided on one side of the substrate and capable of holding an inserted cable; a main body mounting portion provided on the other side of the substrate and having a plurality of engaging pieces engageable with a second surface opposite to the first surface of the mounting object; and an annular packing (パッキン, packing) which is fitted between the substrate and the mounting object in the body mounting portion, wherein the engagement piece of the body mounting portion is provided in a stepped manner along a direction of penetration of the cable in the body mounting portion, and the packing is formed so that an elastic modulus of a region on the mounting object side is lower than that of a region on the substrate side.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the present invention, it is possible to provide a cable stuffing box which can be mounted in a one-touch manner and which can achieve higher waterproofness.

Drawings

Fig. 1 is an exploded perspective view of a cable stuffing box according to embodiment 1.

Fig. 2 is a partially enlarged view showing the structure of the engagement piece in the main body attachment portion.

Fig. 3 is a view of the stuffing box body viewed from the X2 side.

Fig. 4 is a sectional view showing the constitution of the packing.

Fig. 5 is a sectional view showing the constitution of the packing.

Fig. 6(a) to (C) are diagrams showing an example of a case where the cable stuffing box is attached to attachment objects having different thicknesses.

Fig. 7 is a perspective view showing one example of the installation tool.

Fig. 8(a) and (B) are views showing the installation direction of the cable stuffing box by the installation tool.

Fig. 9 is a view showing a manner of detaching the cable stuffing box.

Fig. 10 is a partially enlarged view showing the structure of the engagement piece in the main body attachment portion according to embodiment 2.

Fig. 11 is a diagram showing a cable stuffing box of embodiment 3.

Detailed Description

Hereinafter, embodiments of the present invention will be described. Note that all the drawings attached to the present specification are schematic diagrams, and the shapes, scales, aspect ratios, and the like of the respective portions are physically changed or exaggerated in view of easy understanding and the like. In the drawings, hatching that shows the cross section of the component is appropriately omitted.

In the present specification and the like, terms (for example, "parallel" and "direction") that specify shapes, geometrical conditions, and degrees of these shapes and geometrical conditions include a range of degrees that are regarded as being substantially parallel and a range of directions that are regarded as being approximate, in addition to strict meanings of the terms.

(embodiment 1)

Fig. 1 is an exploded perspective view of a cable stuffing box 1 according to embodiment 1. In this specification and the like, a direction parallel to the center line C of the wire stuffing box 1 will be described as an X (X1-X2) direction or a wire penetrating direction. In each part (described later) constituting the cable stuffing box 1, the center line C of the cable stuffing box 1 is a common center line.

In fig. 1, an attachment object 100 is a general illustration of a part of an instrument (a panel or the like) or a structure (a wall or the like) in an industrial robot, a vehicle, a ship, an aircraft, a plant, or the like. The object 100 to be attached is not limited to the above-described instrument or structure as long as the cable stuffing box 1 can be attached. The basic configuration of the wire stuffing box 1 according to embodiment 1 is the same as that of the wire stuffing box 1A according to embodiment 2 described later.

As shown in fig. 1, the cable stuffing box 1 according to embodiment 1 includes a stuffing box body 10, a sleeve 20, a cover 30, and a stuffing 40.

The stuffing box body 10 is a substantially cylindrical member through which a cable (not shown) can pass. The stuffing box body 10 includes a base plate 11, a cover attachment portion 12, and a body attachment portion 13, which will be described later.

In the stuffing box body 10 of the present embodiment, the base plate 11, the cover attachment portion 12, and the body attachment portion 13 are integrally formed. The stuffing box body 10 and the lid 30 (described later) are formed of a resin such as Polyamide (PA) or polyvinyl chloride (PVC), or a mixture of these resins and fibers.

The substrate 11 is a portion that is in contact with the mounting surface 100a of the mounting object 100 via the filler 40. The base plate 11 is provided in the stuffing box body 10 substantially at the center in the direction of penetration of the cable. The substrate 11 of the present embodiment is formed in a hexagonal shape. Since the base plate 11 has a hexagonal shape, the lid 30 can be screwed with an appropriate torque by fixing the base plate 11 with a tool such as a wrench. The substrate 11 is not limited to a hexagonal shape, and may be formed in a square shape, an octagonal shape, or the like.

The cap mounting portion 12 is a portion to which the sleeve 20 and the cap 30 are mounted. The cover attachment portion 12 is combined with the sleeve 20 and the cover 30 (described later), whereby a cable (not shown) inserted into the cable stuffing box 1 can be held. The cover attachment portion 12, the sleeve 20, and the cover 30 constitute a cable holding portion of the present embodiment.

A plurality of contact pieces 121 are provided at the end of the cover attachment portion 12 on the X1 side. These contact pieces have a substantially triangular sectional shape, and are arranged so as to partially overlap each other in the circumferential direction (this shape is also generally referred to as a sheet configuration). Further, the inner peripheral surfaces of the plurality of contact pieces 121 abut against the outer peripheral surface of the sleeve 20 provided in the cover attachment portion 12. On the other hand, the cover attachment portion 12 is provided with a male screw 122 on the X2 side (the portion where the contact piece 121 is not provided). The male thread 122 is a thread ridge that can be screwed into a female thread (not shown) provided in the cap 30.

The main body mounting portion 13 is a portion to be mounted on the mounting object 100 (cable outlet 100 b). In the main body mounting portion 13, a plurality of engaging pieces 130 are provided along the circumferential direction between the substrate 11 and the end portion on the X2 side. The engaging piece 130 is a portion including: when the cable packing 1 is inserted into the cable outlet 100b of the object 100, it engages with the rear surface (surface on the X2 side) 100c of the object 100. The engagement piece 130 engages with the back surface 100c of the object 100 to be attached, thereby restricting movement of the cable stuffing box 1 in the X direction. The structure of the engaging piece 130 in the main body mounting portion 13 will be explained later.

The sleeve 20 is a cylindrical member inserted into the inner peripheral side of the plurality of contact pieces 121 (cover attachment portions 12). The inner diameter of the sleeve 20 is set to be the same as or slightly larger than the outer diameter of the inserted cable. The sleeve 20 is formed of, for example, silicone rubber, fluororubber, or the like.

The cap 30 is attached to the cap attachment portion 12 (stuffing box body 10). Cable insertion port 30a is formed in cover 30. The cable insertion port 30a is a hole into which a cable is inserted. The inner peripheral surface of the cap 30 on the X2 side is provided with a female screw (not shown) that can be screwed into the male screw 122 of the cap mounting portion 12. In the lid 30, a tool such as a wrench is formed in a hexagonal shape as viewed from the X direction on the outer peripheral surface of the portion where the female screw is provided, and can be fitted.

The cover 30 is provided with a linear protrusion (not shown) on the inner peripheral surface on the X1 side (a portion where the female screw is not formed), and the protrusion is engageable with the contact piece 121 of the cover attachment portion 12. The projection is provided radially from the cable insertion port 30a of the cover 30 to a portion of the female screw. The projections are provided at a plurality of locations (for example, 4 locations) at equal intervals around the center line C of the cover 30. At the position where the cover 30 is screwed in, each protrusion engages with the gap between the adjacent contact pieces 121.

In the lid 30, a portion closer to the X1 side than the hexagonal portion is formed into a substantially spherical shape. That is, the X1 side of cover 30 is formed so that the inner diameter gradually decreases toward cable insertion port 30 a. Therefore, if the cover 30 is screwed, the outer peripheral surface of the cable inserted into the cable stuffing box 1 is held by the plurality of contact pieces 121 provided in the cover attachment portion 12 with substantially uniform pressing force. Further, if the cap 30 is screwed, the entire sleeve 20 is pressed toward the inner diameter side, and thus a gap between the inner circumferential surface of the sleeve 20 and the outer circumferential surface of the cable is closed. Thus, between the sleeve 20 and the cable, a higher waterproofness is obtained. For example, the cable stuffing box 1 of the present embodiment is effective for holding a cable having an outer diameter of about 3 to 25 mm.

The filler 40 is an annular member that is fitted between the substrate 11 and the object 100 to be mounted in the body mount 13. By sealing the space between the substrate 11 and the mounting surface 100a of the mounting object 100 with the filler 40, a higher waterproof property is obtained. The filler 40 is formed of, for example, silicone rubber (SI), Ethylene Propylene Diene Monomer (EPDM), or the like. The constitution of the filler 40 will be explained later.

Next, the structure of the engaging piece 130 provided in the main body mounting portion 13 will be described.

Fig. 2 is a partially enlarged view showing the structure of the engaging piece 130 in the main body mounting portion 13. Fig. 3(a) and (B) are views of the stuffing box body 10 viewed from the X2 side.

As shown in fig. 2, the engagement piece 130 is a portion protruding outward in the radial direction in the stuffing box body 10 (body attachment portion 13). The radially outer side is a direction away from the center line C of the stuffing box body 10 to the outside. The X2-side end portion (hereinafter also referred to as "fixed portion") of the engagement piece 130 is formed integrally with the stuffing box body 10 without protruding from the outer peripheral surface of the stuffing box body 10. On the other hand, a portion of the engagement piece 130 from the X1 side to the fixed portion (hereinafter, also referred to as "movable portion") protrudes from the outer peripheral surface of the stuffing box body 10.

A recessed groove 13a is formed around the engagement piece 130, and the groove 13a penetrates the inner peripheral surface of the stuffing box body 10. That is, the engaging piece 130 is separated from the stuffing box body 10 by the groove portion 13a except for the end portion (fixed portion) on the X2 side. Therefore, in the engaging piece 130, the movable portion can be elastically deformed toward the inside in the radial direction of the stuffing box body 10.

As shown in FIG. 2, the engaging piece 130 has a plurality of step portions 131 to 133 provided in a step shape. The step portions 131 to 133 are surfaces that can engage with the back surface 100c of the mounting object 100. The stepped portions 131 to 133 are different in distance L from the surface 40a on the X2 side of the filler 40 (hereinafter, also referred to as "filler surface") (L1 to L3). Each distance is set in accordance with the thickness of the mounting object 100 to which the cable stuffing box 1 is mounted. For example, when the distances L1, L2, and L3 are set to 1.3mm, 2.0mm, and 2.9mm, respectively, the cable stuffing box 1 can be attached to 3 types (1.6mm, 2.3mm, and 3.2mm) of attachment objects 100 having different thicknesses.

Here, the distances L1, L2, and L3 are values when the amount of elastic deformation of the stuffing 40 is set to about 20% (0.3mm) in a state where the cable stuffing box 1 is attached to the attachment object 100. That is, regardless of whether the thickness of the object 100 to be attached is 1.6mm, 2.3mm, or 3.2mm, the packing 40 is elastically deformed at the same rate when the cable stuffing box 1 is attached to the object 100 to be attached. Further, the amount of elastic deformation of the filler 40 is not limited to this example, but is a value appropriately set. The thickness of the object 100 is an example, and is not limited to this example.

As shown in fig. 3a, the engaging pieces 130 of the present embodiment are provided at 4 locations (one at every 90 ° with the center line C as the center) at equal intervals along the circumferential direction of the main body mounting portion 13. As shown in fig. 3B, the engaging pieces 130 may be provided at 6 locations (one at every 30 ° about the center line C) at equal intervals along the circumferential direction of the main body mounting portion 13. The function of the engagement piece 130 will be explained later.

Next, the structure of the filler 40 will be described.

Fig. 4 is a diagram showing the structure of the filler 40. Fig. 4(a) is a plan view of the packing 40. FIG. 4(B) is a sectional view taken along the line s1-s1 in FIG. 4 (A). FIG. 4(C) is a sectional view taken along the line s2-s2 in FIG. 4 (A).

As shown in fig. 4(a) and (B), the filler 40 includes: the 1 st region 41, which is on the X1 side (the substrate 11 side); and the 2 nd area 42, which is the X2 side (the mounting object 100 side). The 1 st region 41 and the 2 nd region 42 are integrally formed of the aforementioned rubber material.

As for the 1 st region 41, the rubber material is uniformly formed.

In the 2 nd region 42, a plurality of

elastic portions

42a and 42b having a hollow structure are alternately provided. The

elastic portions

42a and 42b are cylindrical holes having a substantially circular cross section. As shown in fig. 4 a, the

elastic portions

42a and 42b are provided at 16 locations (one at 22.5 ° around the center line C) at equal intervals along the circumferential direction of the packing 40. The number and arrangement of the

elastic portions

42a and 42b are not limited to this example. The number and arrangement of the

elastic portions

42a and 42b are appropriately selected according to the outer diameter, inner diameter, thickness, and the like of the packing 40.

As shown in fig. 4(a), the elastic portion 42a is formed from the outer peripheral surface of the packing 40 toward the inner peripheral surface side. As shown in fig. 4(B), the elastic portion 42a does not penetrate the inner peripheral surface of the packing 40. As shown in fig. 4(a), the elastic portion 42b is formed from the inner peripheral surface of the packing 40 toward the outer peripheral surface side. As shown in fig. 4(C), the elastic portion 42b does not penetrate the outer peripheral surface of the filler 40.

Since the 2 nd region 42 of the packing 40 includes the

elastic portions

42a and 42b, the modulus of elasticity is lower than that of the 1 st region 41.

When the body mounting portion 13 to which the packing 40 is attached is inserted into the cable outlet 100b of the mounting object 100 and pressed against the mounting object 100, the 2 nd region 42 (the

elastic portions

42a and 42b) of the packing 40 is elastically deformed in a state of being in close contact with the mounting surface 100a (see fig. 1) of the mounting object 110. Therefore, the filler 40 adheres to the mounting surface 100a of the mounting object 100 in a state where the contact area of the 2 nd region 42 is increased. In this way, the space between the substrate 11 provided in the stuffing box body 10 and the mounting surface 100a of the mounting object 100 is tightly sealed by the elastically deformed stuffing 40, and thus a higher waterproof property is obtained. According to the cable stuffing box 1 including the stuffing 40 of the present embodiment, a higher level of waterproofness can be obtained with respect to the protection level of waterproofness. The waterproof protection level varies depending on the specification of the cable stuffing box 1, and for example, the waterproof property at the IP68 level can be obtained.

Next, another embodiment of the filler 40 will be described.

In the following description and drawings, the same reference numerals are given to portions that achieve the same functions as those in the above-described embodiment shown in fig. 4, or the same reference numerals are given to the last (last two digits) as appropriate, and overlapping descriptions are omitted as appropriate.

Fig. 5 is a sectional view showing the configuration of the packing 140. Fig. 5(a) is a plan view of the packing 140. FIG. 5(B) is a sectional view taken along the line s3-s3 in FIG. 5 (A).

As shown in fig. 5(B), the filler 140 of the present embodiment includes: a 1 st region 141 on the X1 side (substrate 11 side); and the 2 nd region 142, which is on the X2 side (the mounting object 100 side). The 1 st and 2

nd regions

141 and 142 are integrally formed of the aforementioned rubber material. As for the 1 st region 141, the rubber material is uniformly formed. On the other hand, the 2 nd region 142 has a hollow structure inside. In the hollow portion of the 2 nd region 142, an air layer 142a is formed. As shown in fig. 5(a), air layer 142a is formed in an annular shape along the circumferential direction of filler 140. In this way, since the filler 140 of the present embodiment forms the air layer 142a in the 2 nd region 142, the modulus of elasticity of the 2 nd region 142 is lower than that of the 1 st region 141.

In the present embodiment, if the body mounting portion 13 to which the packing 40 is attached is inserted into the cable outlet 100b of the mounting object 100 and pressed against the mounting object 100, the 2 nd region 142 (air layer 142a) of the packing 140 is elastically deformed in a state of being in close contact with the mounting surface 100a of the mounting object 110. Therefore, the filler 140 adheres to the mounting surface 100a of the mounting object 100 in a state where the contact area of the 2 nd region 142 is increased. In this way, in the present embodiment, the space between the substrate 11 provided in the stuffing box body 10 and the mounting surface 100a of the mounting object 100 is also tightly sealed by the elastically deformed stuffing 140, and therefore, higher waterproofness is obtained.

Next, the function of the engagement piece 130 provided in the main body mounting portion 13 will be described.

Fig. 6(a) to (C) are diagrams showing an example of a case where the cable stuffing box 1 is attached to the attachment object 100 having different thicknesses. In fig. 6(a) to (C), the distances L1, L2, and L3 of the engaging piece 130 are 1.3mm, 2.0mm, and 2.9mm, respectively, and the thickness of the mounting object 100 is 1.6mm, 2.3mm, and 3.2mm in the same manner. These distances and thicknesses are examples, and are not limited to these. In addition, if the range is within the allowable range, a minute dimensional error is absorbed by the elastic force of the filler 40.

When the main body attachment portion 13 side of the cable stuffing box 1 is inserted into the cable outlet 100b (see fig. 2) of the attachment object 100 and strongly pressed toward the X2 side, the engaging piece 130 of the main body attachment portion 13 is elastically deformed inward in the radial direction by a pressing force generated between the engaging piece and the inner peripheral surface of the cable outlet 100b when passing through the cable outlet 100 b. When the engaging piece 130 (any stepped portion) of the body attachment portion 13 reaches the back surface 100c on the opposite side from the attachment surface 100a of the attachment object 100, the pressing force is released, and the engaging piece is returned to a position outside the outer peripheral surface of the stuffing box body 10 at that position.

As shown in fig. 6 a, when the thickness of the attachment object 100 is 1.6mm, the step portion 131 (distance L1) of the engaging piece 130 is released when it passes over the back surface 100c of the attachment object 100, and at this position, it is returned to a position outside the outer peripheral surface of the stuffing box body 10 and engages with the back surface 100c of the attachment object 100. Further, the stepped

portions

132 and 133 also go over the back surface 100c of the object 100 before the stepped portion 131 goes over the back surface 100c of the object 100, but at this time, the cable stuffing box 1 is further pushed toward the X2 side, and therefore the stepped

portions

132 and 133 are not engaged with the back surface 100c of the object 100. In fig. 6 a, the cable CA inserted into the cable stuffing box 1 is indicated by a phantom line (two-dot chain line).

As shown in fig. 6B, when the thickness of the attachment object 100 is 2.3mm, the step portion 132 (distance L2) of the engaging piece 130 is released when it passes over the back surface 100c of the attachment object 100, and at this position, it is returned to a position outside the outer peripheral surface of the stuffing box body 10 and engages with the back surface 100c of the attachment object 100. Further, the stepped portion 133 also passes over the rear surface 100c of the object 100 before the stepped portion 132 passes over the rear surface 100c of the object 100, but at this time, the cable stuffing box 1 is further pushed toward the X2 side, and thus the stepped portion 133 is not engaged with the rear surface 100c of the object 100. When the thickness of the object 100 is 2.3mm, the cable stuffing box 1 cannot be further pushed toward the X2 side when the stepped portion 132 goes over the back surface 100c of the object 100. Therefore, the cable stuffing box 1 engages with the rear surface 100c of the object 100 to be attached at the stepped portion 132.

As shown in fig. 6C, when the thickness of the attachment object 100 is 3.2mm, the step 133 (distance L3) of the engaging piece 130 is released when it goes over the back surface 100C of the attachment object 100, and at this position, it is returned to a position outside the outer peripheral surface of the stuffing box body 10 and engages with the back surface 100C of the attachment object 100. When the thickness of the object 100 is 3.2mm, the cable stuffing box 1 cannot be further pushed toward the X2 side when the stepped portion 133 goes over the back surface 100c of the object 100. Therefore, the cable stuffing box 1 engages with the rear surface 100c of the object 100 to be attached at the stepped portion 133.

In fig. 6(a) to (C), if the engagement piece 130 of the main body attachment portion 13 is engaged with the back surface 100C of the object 100, the space between the cable stuffing box 1 (substrate 11) and the attachment surface 100a of the object 100 is tightly sealed by the elastically deformed stuffing 40, and thus a higher waterproof property can be obtained.

After the cable stuffing box 1 is attached to the attachment object 100, the cable CA (see fig. 6 a) is inserted from the cable insertion port 30a (see fig. 1) of the cover 30, and after being fed to the opposite side by a predetermined length, the cover 30 is attached to the male screw 122 of the cover attachment portion 12 (stuffing box main body 10), and the male screw 122 is screwed to the female screw formed on the inner peripheral surface of the cover 30 on the X2 side. Then, the cap 30 is twisted in the X2 direction by screwing the cap 30 clockwise with a tool or the like, and a female screw (not shown) formed on the inner peripheral surface of the cap 30 on the X2 side is fastened to the male screw 122 of the cap attaching portion 12 (stuffing box main body 10).

Further, if the lid 30 is screwed, the inner circumferential surface of the portion formed in a substantially spherical shape on the X1 side of the lid 30 abuts against the plurality of contact pieces 121 (see fig. 1) provided on the X1 side of the lid attachment portion 12, and the plurality of contact pieces 121 are pressed inward in the radial direction. This pressing causes the plurality of contact pieces 121 to elastically deform inward in the radial direction. If the plurality of contact pieces 121 are elastically deformed inward in the radial direction, the sleeve 20 provided on the inner peripheral surface of the cover attachment portion 12 is pressed inward in the radial direction uniformly. As a result, the outer peripheral surface of the cable inserted into the sleeve 20 is firmly in close contact with the inner peripheral surface of the sleeve 20, and the cable is fixed inside the cable stuffing box 1. By fixing the cable, water, oil, dust, and the like are prevented from entering from the cable insertion port 30a of the cover 30, and slack of the cable due to vibration, positional displacement of the cable due to stretching, and the like are prevented.

As described above, the cable stuffing box 1 of the present embodiment can be attached to the attachment object 100 in one touch. Further, if the cable stuffing box 1 is attached to the object 100, the space between the cable stuffing box 1 (substrate 11) and the attachment surface 100a of the object 100 is tightly sealed by the elastically deformed stuffing 40. Therefore, after the mounting, the locking nut is not screwed further, and a higher waterproof property can be obtained.

The cable stuffing box 1 of the present embodiment can be attached to a plurality of (3 in this example) attachment objects 100 having different thicknesses. Accordingly, it is not necessary to prepare a plurality of types of cable stuffing boxes so as to be suitable for the mounting object 100, and the number of parts can be reduced. In addition, since the number of metal molds for manufacturing the cable stuffing box can be reduced, the cost can be reduced, and the productivity can be further improved.

In addition, conventionally, in order to improve waterproofness, a female screw is formed in the cable outlet 100b of the mounting object 100, and a male screw is formed in the cable stuffing box, and the female screw and the male screw are screwed together. However, in the cable stuffing box 1 according to the present embodiment, even if a screw thread is not formed on any of the attachment object 100 and the stuffing box main body 10, a higher waterproof property is obtained, and therefore, the structure can be simplified and the workability can be improved. Further, the cable stuffing box 1 according to the present embodiment can be attached to the conventional attachment object 100 in which the female screw is formed in the cable outlet 100b, and thus can be used in many places and applications.

Next, the mounting and dismounting of the cable stuffing box 1 will be described.

Fig. 7 is a perspective view showing one example of the installation tool 200. Fig. 8(a) and (B) are views showing an installation method of installing the cable stuffing box 1 by the installation tool 200.

As shown in fig. 7, the mounting tool 200 includes a pressing portion 210 and a grip portion 220. The pressing portion 210 is a portion as follows: the head (cover 30) of the stuffing box 1 is struck with a tool such as a hammer in a state of being in contact therewith. Cable holes 211, 213, and 215 (hereinafter, also simply referred to as "cable holes") are provided in the pressing portion 210 of the present embodiment. Cables with different diameters are respectively embedded into the cable holes. The cable hole 211 is a hole in which a cable of a minimum diameter is embedded. The cable hole 213 is a hole in which a medium-diameter cable is embedded. The cable hole 215 is a hole in which the maximum diameter cable is embedded. In fig. 7, an example in which 3 cable holes are provided in the pressing portion 210 is shown, but the size, number, and the like of the cable holes are not limited to the example of fig. 7, and are set as appropriate.

Each cable hole is provided with

grooves

212, 214, and 216 (hereinafter, also simply referred to as "grooves"). The groove portion penetrates from the side surface of the pressing portion 210 to the cable hole. As described later, since the pressing portion 210 is formed of hard rubber or the like, the fitting tool 200 can be fitted into the cable inserted into the cable stuffing box 1 by enlarging the gap between the groove portions. In addition, the installation tool 200 can be detached from the cable inserted into the cable stuffing box 1 by enlarging the interval of the groove portions in a state where the cable is inserted into the cable hole.

The grip portion 220 is a gripping portion of the installation tool 200. The operator can support the mounting tool 200 by gripping the grip portion 220 with a hand. The pressing portion 210 and the grip portion 220 are integrally formed of hard rubber or the like. The thickness of the mounting tool 200 is, for example, about 5 to 7 mm.

When the cable stuffing box 1 is attached to the object 100, as shown in fig. 8(a), the body attachment portion 13 of the cable stuffing box 1 is inserted into the cable extraction port 100b of the object 100. Thereby, the cable stuffing box 1 is temporarily fixed to the cable outlet 100 b. In this state, the installation tool 200 (e.g., the cable hole 215) is embedded in the cable CA into which the cable stuffing box 1 is inserted. Then, the pressing portion 210 of the attachment tool 200 is struck (pressed) in the X2 direction with a hammer (not shown). As a result, as shown in fig. 8(B), since the engagement piece 130 of the body mounting portion 13 driven into the mounting object 100 is engaged with the back surface 100c of the mounting object 100, the cable stuffing box 1 can be mounted to the mounting object 100. Subsequently, by enlarging the interval of the groove portions 216 of the mounting tool 200, the mounting tool 200 can be detached from the cable CA inserted into the cable stuffing box 1.

In fig. 8, an example of attaching the cable gland 1 into which the cable CA is inserted to the object 100 to be attached is described, but when the cable gland 1 into which the cable CA is not inserted (before insertion) is attached to the object 100 to be attached, the pressing portion 210 of the attachment tool 200 may be struck in the X2 direction with a hammer in a state of being brought into contact with the cover 30 of the cable gland 1.

Next, a case where the cable stuffing box 1 is detached from the attachment object 100 will be described. Fig. 9(a) and (B) are diagrams showing a method of detaching the cable stuffing box 1 by the detaching tool 300.

When the cable stuffing box 1 is detached from the object 100 to be attached, the removal tool 300 shown in fig. 9(a) is used, whereby the cable stuffing box 1 can be more easily and reliably detached. The removal tool 300 is a substantially cylindrical member, and an annular pressing plate 301 is provided at one end. The pressing plate 301 is a portion to be struck by a tool such as a hammer. An opening 301a is provided in the center of the pressing plate 301. As described later, the opening 301a is a portion into which a tool such as a screwdriver is inserted. The other end of the removal tool 300 is open. The removal tool 300 includes a pressing plate 301, and is integrally formed of metal, resin, or the like.

When the cable stuffing box 1 is detached from the object 100, as shown in fig. 9(a), the detaching tool 300 is put on the body attaching portion 13 of the cable stuffing box 1 attached to the object 100. Thereby, the removal tool 300 is temporarily fixed to the body attachment portion 13. In this state, the pressing plate 301 is struck in the X1 direction with a hammer (not shown) and the removal tool 300 is moved to the X1 side. When the X1-side end of the removal tool 300 reaches the back surface 100c of the object 100, the engagement piece 130 provided in the main body attachment portion 13 of the cable gland 1 is elastically deformed inward in the radial direction as shown in fig. 9 (B). Thereby, the engagement of the engagement piece 130 with the rear surface 100c of the mounting object 100 is released, and the cable stuffing box 1 can move in the X1 direction. Then, a tool (not shown) such as a screwdriver is inserted from the opening 301a (pressing plate 301) of the removal tool 300, and the body attachment portion 13 of the cable stuffing box 1 is pushed toward the X1 side, whereby the cable stuffing box 1 can be pushed out from the X1 side. In this case, since it is not necessary to dispose an operator for pulling out the cable stuffing box 1 on the mounting surface 100a side of the mounting object 100, the removal operation of the cable stuffing box 1 can be performed by one operator. In the state shown in fig. 9(B), the cable stuffing box 1 may be pulled out in the X1 direction from the attachment surface 100a side of the attachment object 100 without using a tool.

In fig. 9, an example in which the cable stuffing 1 into which the cable CA is not inserted is removed from the object 100 to be attached is described, but the cable stuffing 1 into which the cable CA is inserted can be removed from the object 100 to be attached in the same order.

The inner diameter L4 of the removal tool 300 is preferably the same or slightly larger diameter than the outer diameter L5 of the main body mount 13 of the cable gland 1. Fig. 9(a) illustrates L4 as L5. With such a configuration, when the removal tool 300 is struck with a hammer, the engagement piece 130 (the main body attachment portion 13) of the wire stuffing box 1 can be elastically deformed more reliably toward the inside in the radial direction.

(embodiment 2)

The cable stuffing box 1A according to embodiment 2 is different from embodiment 1 in that the engaging pieces are provided in 2 rows. The cable stuffing box 1A according to embodiment 2 has the same other configuration as that of embodiment 1. Therefore, in fig. 10, only the main body attachment portion 13A and its periphery are mainly illustrated, and the entire cable stuffing box 1A is not illustrated. In the description of embodiment 2 and the drawings, the same members and the like as those of embodiment 1 are denoted by the same reference numerals as those of embodiment 1, and redundant description thereof will be omitted.

Fig. 10 is a partially enlarged view showing the structure of the engagement piece 130 in the main body mounting portion 13A according to embodiment 2.

As shown in fig. 10, the cable stuffing box 1A of

embodiment

2, 2 engaging pieces 130 are provided in 2 rows along the circumferential direction of the body mounting portion 13A. Here, one engaging piece is referred to as "130A", and the other engaging piece is referred to as "130B". A groove portion 13B is provided between the engagement piece 130A and the engagement piece 130B. Therefore, the engaging piece 130A and the engaging piece 130B can be elastically deformed independently of each other.

The engaging piece 130A has a plurality of step portions 131 to 133 provided in a step shape. The stepped portions 131 to 133 are formed at distances L1 to L3 from the packing surface 40a, respectively, as in the stepped portions 131 to 133 shown in fig. 2 (embodiment 1).

The engaging piece 130B has a plurality of stepped portions 137-139 provided in a step shape. The step portions 137 to 139 are different from the packing surface 40a in distance L (L7 to L9). Each distance is set in accordance with the thickness of the mounting object 100 to which the cable stuffing box 1 is mounted. For example, when the distances L7, L8, and L9 are set to 4.2mm, 5.7mm, and 8.7mm, respectively, the cable stuffing box 1A can be attached to 3 types (4.5mm, 6.0mm, and 9.0mm) of attachment objects 100 having different thicknesses. That is, in the above 2

engaging pieces

130A and 130B, the positions of the stepped portions from the packing surface 40A are different from each other in the cable penetrating direction in the body mounting portion 13.

As described above, the cable stuffing box 1A according to embodiment 2 can be attached to the objects 100 to be attached having a thickness of 1.6mm, 2.3mm, or 3.2mm in the engaging piece 130A, and can be attached to the objects 100 to be attached having a thickness of 4.5mm, 6.0mm, or 9.0mm in the engaging piece 130B. Therefore, the cable stuffing box 1A according to embodiment 2 can be attached to 6 types of attachment objects 100 having different thicknesses.

In addition, when 6 kinds of stepped portions are provided in one engagement piece 130, the amount of elastic deformation of the engagement piece 130 increases, and the load on the engagement piece 130 increases. Therefore, the engaging piece 130 may be damaged. Further, since the amount of elastic deformation of the engagement piece 130 is increased, the outer diameter of the inserted cable may be restricted so that the elastically deformed engagement piece 130 does not interfere with the cable. However, in the cable stuffing box 1A according to embodiment 2, since the engaging pieces are provided in 2 rows (130A, 130B), the breakage of the engaging pieces 130 can be suppressed without increasing the load of the engaging

pieces

130A, 130B. In addition, according to the present embodiment, since the amount of elastic deformation of the engaging

pieces

130A and 130B is not increased, the restriction on the outer diameter of the inserted cable can be reduced.

(embodiment 3)

Fig. 11 is a diagram showing a cable stuffing box 1B of embodiment 3. Fig. 11 is a view of the cable stuffing box 1B viewed from the X2 side.

The cable stuffing box 1B according to embodiment 3 is different from embodiment 1 in that it includes 2 engaging pieces having different sizes. The cable stuffing box 1B according to embodiment 3 has the same other configuration as that of embodiment 1. Therefore, in fig. 11, only the main body attachment portion 13B and the periphery thereof are mainly illustrated, and the entire cable stuffing box 1B is not illustrated. In the description of embodiment 3 and the drawings, the same members and the like as those of embodiment 1 are denoted by the same reference numerals as those of embodiment 1, and redundant description thereof is omitted.

As shown in fig. 11, in the cable stuffing box 1B according to embodiment 3, the engaging

pieces

130 and 130C are provided at 6 locations along the circumferential direction of the main body attachment portion 13B. The engaging piece 130 is the same as the engaging piece 130 of embodiment 1. The engaging piece 130C is formed such that the height of the step portion (no reference numeral) is lower than that of the engaging piece 130. In the engaging piece 130C, the distance from the filler surface 40a (see fig. 2) is the same as that of the engaging piece 130. The engaging

pieces

130 and 130C are alternately provided at 6 locations (one at every 60 ° around the center line C) at equal intervals in the circumferential direction of the main body mounting portion 13.

As described above, in the cable stuffing box 1B according to embodiment 3, a plurality of 2 engaging pieces having different sizes are provided along the circumferential direction of the body attachment portion 13B. Therefore, when the cable stuffing box 1B is attached to the object 100, the engaging piece 130C having a height lower than the engaging piece 130 can be pushed into the object 100 with a pressing force smaller than the engaging piece 130. Therefore, the cable stuffing box 1B can be attached to the attachment object 100 with a smaller pressing force than the configuration in which the engaging piece 130 of embodiment 1 is provided at 6 locations. Further, since the engaging

pieces

130 and 130C are alternately provided at equal intervals along the circumferential direction of the main body mounting portion 13, the fixing force in the circumferential direction of the main body mounting portion 13 can be equalized.

While the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications and changes can be made as described in the modification modes described below, and they are also included in the technical scope of the present invention. The effects described in the examples are merely the most suitable effects according to the present invention, and are not limited to the effects described in the embodiments. The above-described embodiments and the modifications described below can also be used in combination as appropriate, but detailed description is omitted.

(modification mode)

The following configuration may be adopted: an annular groove is formed in the X2-side surface of the substrate 11 (stuffing box body 10), and the 1 st region 41 side of the stuffing 40(140) is embedded in the groove. With this configuration, the positional deviation of the filler 40(140) can be suppressed.

In the packing 40 shown in fig. 4, the cross-section of the

elastic portions

42a and 42b is not limited to a substantially circular shape, and may be polygonal (e.g., octagonal) or elliptical. The arrangement of the

elastic portions

42a and 42b is not limited to the example shown in fig. 4. For example, the positions of the

elastic portions

42a and 42b may be alternately different in the thickness direction (X direction) of the packing 40, or may be provided in 2 rows in the circumferential direction of the packing 40.

In the filler 140 shown in fig. 5, the 1 st region 141 and the 2 nd region 142 may be formed of other materials. In this case, the 1 st region 141 and the 2 nd region 142 can be configured as one filler 140 by bonding them with an adhesive or the like. In addition, the 2 nd region 142 of the filler 140 is not limited to the hollow structure, and may be formed of a material having a lower elastic modulus than the 1 st region 41, for example.

The plurality of engaging pieces 130 (see fig. 3) may be provided at least 2 positions at equal intervals along the circumferential direction of the stuffing box body 10. The plurality of engaging pieces 130 may be provided at 3 positions, preferably at equal intervals, along the circumferential direction of the stuffing box body 10.

In embodiment 2, an example in which 2 rows of engaging pieces 130 are provided is described, but the present invention is not limited thereto, and 3 rows may be provided. The number of the step portions in the 1 engaging piece 130 may be at least 2, or may be 4 or more.

[ description of reference numerals ]

1. 1A: cable stuffing box, 10: stuffing box body, 11: substrate, 12: cover mounting portion, 13: body mounting portion, 13a, 13 b: groove portion, 20: sleeve, 30: cover, 40, 140: filler, 41, 141:

zone

1, 42, 142:

region

2, 130A, 130B, 130C: engaging piece, 131 to 133, 137 to 139: step portion, 200: installation tool, 300: and (6) disassembling the tool.

Claims

1. A cable stuffing box which is installed on an opening of an installation object and holds a cable inserted into the cable stuffing box, the cable stuffing box comprises:

a substrate facing a first surface of the mounting object;

a cable holding portion provided on one side of the substrate and capable of holding an inserted cable;

a main body mounting portion provided on the other side of the substrate and having a plurality of engaging pieces engageable with a second surface opposite to the first surface of the mounting object; and

an annular filler which is fitted between the substrate and an object to be mounted in the body mounting portion,

in the engaging piece of the main body mounting portion, a plurality of stepped portions are provided in a step shape along a penetrating direction of the cable in the main body mounting portion, wherein the plurality of stepped portions are capable of engaging with the second surfaces of the mounting objects having different thicknesses,

the filler is formed so that the elastic modulus of a region on the mounting object side is lower than that of a region on the substrate side.

2. The cable stuffing box of claim 1, wherein:

the cable connector is characterized in that a plurality of types of the engaging pieces are arranged along the circumferential direction of the main body installation part, and the positions of the stepped parts on the various types of the engaging pieces are different from each other in the penetrating direction of the cable of the main body installation part.

3. The cable stuffing box of claim 2, wherein:

a groove portion is provided between the plurality of types of engaging pieces.

4. A cable stuffing box according to any of claims 1 to 3, characterized in that:

the plurality of engaging pieces are provided in plurality along a circumferential direction of the main body mounting portion, and the step portion of one of the engaging pieces is smaller than the step portion of the other of the engaging pieces in a pair of the engaging pieces facing each other with the center axis of the main body mounting portion interposed therebetween.

5. A cable stuffing box according to any of claims 1 to 3, characterized in that:

in the packing, a plurality of elastic portions having a hollow structure are provided at a portion on the side of the object to be attached.

6. The cable stuffing box of claim 4, wherein: