WO2019037709A1

WO2019037709A1 - Cable gland

Info

Publication number: WO2019037709A1
Application number: PCT/CN2018/101498
Authority: WO
Inventors: 前迫义幸
Original assignee: 电化江玲久斗论株式会社; 电化有限公司
Priority date: 2017-08-21
Filing date: 2018-08-21
Publication date: 2019-02-28
Also published as: JP2019037094A; CN109428295B; CN109428295A; JP6886892B2

Abstract

A cable gland (1). The cable gland (1) can be mounted in a one-touch manner and is highly waterproof. The cable gland (1) comprises: a base plate (11), opposite to a first surface (100a) of an object to be mounted (100); a cable holding portion (12, 20, 30), disposed on one side of the base plate (11) to hold an inserted cable; a main mounting portion (13), disposed on the other side of the base plate (11), and comprising multiple snap fit pieces (130) that can be snap fit to a second surface (100c) of the object to be mounted (100) on the opposite side of the first surface (100a); and an annular packing (40). For the snap fit pieces (130) of the main mounting portion (13), multiple step portions (131-133) adapted to be respectively snap fit to the second surfaces (100c) of objects to be mounted (100) having different thicknesses are disposed in a stepped manner in a running through direction of a cable in the main mounting portion (13). The packing (40) is formed in such a manner that the elastic modulus of the area at the object to be mounted (100) side is lower than that of the area at the base plate (11) side.

Description

Cable stuffing box

Technical field

The invention relates to a cable stuffing box (cable gland).

Background technique

In an industrial robot, a vehicle, a ship, an aircraft, a factory equipment, or the like, a cable stuffing box is attached to a cable take-out port of an instrument (a panel or the like) or a structure (a wall or the like). The cable stuffing box has a function of preventing water, oil, dust, and the like from intruding from the cable insertion opening, and preventing the cable from being slack due to vibration, and the position of the cable being deviated due to stretching. For the fixing of the cable stuffing box, the following method is adopted: after the stuffing box main body is assembled to the cable take-out port, the lock nut is embedded in the threaded portion protruding on the opposite side of the cable take-out opening, with the tool Screw in (for example, refer to Patent Document 1).

Prior art literature

Patent literature

Patent Document 1: Japanese Laid-Open Patent Publication No. 2000-151176.

technical problem

Since the existing cable stuffing box is a structure in which the lock nut is screwed in, in order to prevent the stuffing box main body and the lock nut from rotating together, on the side and the opposite side on which the stuffing box main body is mounted (for example, The opposite side of the iron plate of the ship, etc., requires the operator separately. Therefore, the existing cable stuffing box has the problem of installation time, labor, and personnel expenses.

It is an object of the present invention to provide a cable stuffing box that can be installed in a one-touch manner and that is more waterproof.

Technical solution

The present invention relates to a cable stuffing box that is attached to an opening of an object to be mounted and that holds a cable inserted therein, the cable stuffing box having a substrate facing the first surface of the object to be mounted; The cable holding portion is provided on one side of the substrate to hold the inserted cable, and the main body mounting portion is provided on the other side of the substrate and has a surface opposite to the first surface of the mounting object a plurality of engaging pieces that are engaged with the second surface of the side; and an annular packing that is attached between the substrate and the mounting object in the main body mounting portion, the main body mounting portion The plurality of step portions that are engageable with the second surface of the mounting object having different thicknesses are arranged in a stepped manner along a through direction of the cable in the main body mounting portion, The filler is formed such that the elastic modulus of the region on the side of the object to be mounted is lower than the region on the side of the substrate.

Beneficial effect

According to the present invention, it is possible to provide a cable stuffing box which can be installed in a one-touch manner and which is more waterproof.

DRAWINGS

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

FIG. 2 is a partially enlarged view showing a configuration of the engaging piece 130 in the main body mounting portion 13.

Fig. 3 is a view when the stuffer body 10 is viewed from the X2 side.

FIG. 4 is a cross-sectional view showing the configuration of the filler 40.

FIG. 5 is a cross-sectional view showing the configuration of the filler 140.

(A) to (C) of FIG. 6 are views showing an example of a case where the cable stuffing box 1 is attached to the mounting object 100 having a different thickness.

FIG. 7 is a perspective view showing one example of the installation tool 200.

8(A) and 8(B) are views showing a mounting direction in which the cable stuffing box 1 is mounted by the mounting tool 200.

Fig. 9 is a view showing a manner of disassembly of the cable stuffing box 1.

FIG. 10 is a partially enlarged view showing a configuration of the engagement piece 130 in the main body attachment portion 13A of the second embodiment.

Fig. 11 is a view showing a cable stuffing box 1B according to a third embodiment.

Embodiments of the invention

Hereinafter, embodiments of the present invention will be described. In addition, the drawings attached to the present specification are all schematic views, and the shapes, scales, and aspect ratios of the respective portions are changed or exaggerated from the actual object in consideration of easy understanding. In addition, in the drawings, the hatching showing the cross section of the member is omitted as appropriate.

In the present specification and the like, terms (for example, "parallel", "direction", and the like) for the degree of shape, geometrical conditions, and particularly the conditions of these shapes and geometrical conditions, in addition to the strict meaning of the terms thereof. It also includes a range that is considered to be approximately parallel, and a range that is considered to be approximately the direction.

First embodiment)

Fig. 1 is an exploded perspective view of a cable stuffing box 1 according to a first embodiment. Further, in the present specification and the like, a direction parallel to the center line C of the cable stuffing box 1 will be described as the X (X1-X2) direction or the through direction of the cable. Further, in each portion (described later) constituting the cable stuffing box 1, the center line C of the cable stuffing box 1 serves as a common center line.

In FIG. 1, the object to be mounted 100 generally shows a part of a device (a panel or the like) and a structure (wall or the like) in the above-described industrial robot, vehicle, ship, aircraft, factory equipment, and the like. Further, as long as the cable object 1 can be attached to the object 100, it is not limited to the above-described instruments and structures. The basic configuration of the cable stuffing box 1 of the first embodiment is the same as that of the cable stuffing box 1A of the second embodiment to be described later.

As shown in FIG. 1, the cable stuffing box 1 of the first embodiment includes a stuffing box main body 10, a sleeve 20, a lid 30, and a filler 40.

The stuffing box main body 10 is a substantially cylindrical member through which a cable (not shown) can pass. The stuffing box main body 10 includes a substrate 11 , a lid mounting portion 12 , and a main body mounting portion 13 which will be described later.

In the stuffing box main body 10 of the present embodiment, the substrate 11, the lid attaching portion 12, and the main body attaching portion 13 are integrally formed. Further, the stuffing box main body 10 and the lid 30 (described later) are formed of a resin such as polyamide (PA) or polyvinyl chloride resin (PVC) or a mixture of these resins and fibers.

The substrate 11 is a portion that comes into contact with the mounting surface 100 a of the mounting object 100 via the filler 40 . The substrate 11 is provided in the stuffing box main body 10 at substantially the center in the through direction of the cable. The substrate 11 of the present embodiment is formed in a hexagonal shape. Since the substrate 11 has a hexagonal shape, the cover plate 30 can be screwed in with an appropriate torque by fixing the substrate 11 with a tool such as a wrench. Further, 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 cover mounting portion 12 is a portion to which the sleeve 20 and the cover 30 are attached. By combining the cover attaching portion 12 with the sleeve 20 and the cover 30 (described later), the cable (not shown) into which the cable stuffing box 1 is inserted can be held. The lid attachment portion 12, the sleeve 20, and the lid 30 constitute the cable holding portion of the present embodiment.

A plurality of contact pieces 121 are provided at the end of the cover mounting portion 12 on the X1 side. These contact pieces have a substantially triangular cross-sectional shape, and are arranged such that a part of each other overlaps each other in the circumferential direction (this shape is also generally referred to as a sheet structure). Further, the inner circumferential surfaces of the plurality of contact pieces 121 abut against the outer circumferential surface of the sleeve 20 provided in the lid attachment portion 12 . On the other hand, on the X2 side of the cover mounting portion 12 (the portion where the contact piece 121 is not provided), a male screw 122 is provided. The male thread 122 is a thread that can be threadedly engaged with a female thread (not shown) provided on the cover 30.

The main body mounting portion 13 is a portion to be mounted on the mounting object 100 (the cable take-out port 100b). In the main body mounting portion 13, a plurality of engaging pieces 130 are provided along the circumferential direction between the end portions of the substrate 11 and the X2 side. The engaging piece 130 is a portion that engages with the back surface (surface on the X2 side) 100c of the mounting object 100 when the cable stuffing box 1 is inserted into the cable take-out port 100b of the mounting object 100. The engagement piece 130 is engaged with the back surface 100c of the attachment object 100, thereby restricting the movement of the cable stuffing box 1 in the X direction. The configuration of the engaging piece 130 in the main body mounting portion 13 will be described later.

The sleeve 20 is a cylindrical member that is inserted into the inner peripheral side of the plurality of contact pieces 121 (the cover attaching portion 12). The inner diameter of the sleeve 20 is set to be the same 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 cover 30 is a member to be mounted on the cover mounting portion 12 (the stuffing box main body 10). In the cover 30, a cable insertion opening 30a is formed. The cable insertion port 30a is a hole into which the cable is inserted. The cover 30 is provided with a female screw (not shown) on the inner peripheral surface of the X2 side, and the female screw can be screwed into the male screw 122 of the cover attaching portion 12. In the cover 30, the outer peripheral surface of the portion where the female screw is provided is formed in a hexagonal shape when viewed from the X direction, and the tool can be fitted.

The cover 30 is provided with a linear projection (not shown) on the inner peripheral surface of the X1 side (portion where the female screw is not formed), and the projection can be engaged with the contact piece 121 of the cover attaching portion 12. This projection is radially provided from the cable insertion opening 30a of the cover 30 to the portion of the female screw. The protrusions are provided at a plurality of locations (for example, four locations) at equal intervals around the center line C of the cover 30. At a position where the cover 30 is screwed in, the respective projections are engaged with the gap between the adjacent contact pieces 121.

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

The filler 40 is an annular member that is mounted between the substrate 11 and the object to be mounted 100 in the main body mounting portion 13. By sealing the substrate 11 and the mounting surface 100a of the mounting object 100 by the filler 40, higher water repellency is obtained. The filler 40 is formed of, for example, silicone rubber (SI), ethylene propylene diene monomer (EPDM), or the like. The composition of the filler 40 will be described later.

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

FIG. 2 is a partially enlarged view showing a configuration of the engaging piece 130 in the main body mounting portion 13. 3(A) and 3(B) are views when the stuffer body 10 is viewed from the X2 side.

As shown in FIG. 2, the engaging piece 130 is a portion that protrudes outward in the radial direction in the stuffing box main body 10 (main body mounting portion 13). The outer side in the radial direction is a direction away from the center line C of the stuffing box main body 10 to the outside. The end portion on the X2 side of the engaging piece 130 (hereinafter also referred to as "fixed portion") does not protrude from the outer peripheral surface of the stuffing box main body 10, but is formed integrally with the stuffing box main body 10. On the other hand, a portion of the engaging piece 130 from the X1 side to the fixed portion (hereinafter also referred to as a "movable portion") protrudes from the outer peripheral surface of the stuffing box main body 10.

A groove portion 13a having a concave shape is formed around the engagement piece 130, and the groove portion 13a penetrates the inner circumferential surface of the stuffing box body 10. In other words, the engaging piece 130 is separated from the stuffing box main 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 inner side in the radial direction of the stuffing box main body 10.

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

Here, the distances L1, L2, and L3 are numerical values when the amount of elastic deformation of the filler 40 is about 20% (0.3 mm) in a state where the cable stuffing box 1 is attached to the object 100 to be mounted. In other words, regardless of the thickness of the mounting object 100 of 1.6 mm, 2.3 mm, and 3.2 mm, when the cable stuffing box 1 is attached to the mounting object 100, the filler 40 is elastically deformed in the same ratio. Further, the amount of elastic deformation of the filler 40 is not limited to this example, but is a value set appropriately. In addition, the thickness of the above-described mounting object 100 is an example, and is not limited to this example.

As shown in FIG. 3(A), the engagement piece 130 of the present embodiment is provided at four intervals at equal intervals along the circumferential direction of the main body attachment portion 13 (one at every 90° centering on the center line C) . Further, as shown in FIG. 3(B), the engagement pieces 130 may be provided at six intervals at equal intervals along the circumferential direction of the main body attachment portion 13 (one centered on the center line C and provided at every 30 degrees) . The function of the engaging piece 130 will be described later.

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

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

As shown in FIG. 4 (A) and (B), the filler 40 is provided with the first region 41 and the X1 side (the substrate 11 side), and the second region 42 is the X2 side (the mounting object 100 side). The first region 41 and the second region 42 are integrally formed of the aforementioned rubber material.

Regarding the first region 41, the rubber material is uniformly formed.

In the second 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 intervals of 16 in the circumferential direction of the filler 40 (one centered at the center line C and provided at every 22.5°). Further, the number and arrangement of the elastic portions 42a and 42b are not limited to the present example. The number and arrangement of the elastic portions 42a and 42b are appropriately selected depending on the outer diameter, inner diameter, thickness, and the like of the filler 40.

As shown in FIG. 4(A), the elastic portion 42a is formed from the outer circumferential surface of the filler 40 toward the inner circumferential surface side. As shown in FIG. 4(B), the elastic portion 42a does not penetrate the inner circumferential surface of the filler 40. As shown in FIG. 4(A), the elastic portion 42b is formed from the inner circumferential surface of the filler 40 toward the outer circumferential 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 second region 42 of the filler 40 includes the above-described elastic portions 42a and 42b, the elastic modulus is lower than that of the first region 41.

When the main body attachment portion 13 to which the filler 40 is attached is inserted into the cable take-out port 100b of the object 100 to be attached, the second region 42 (elastic portions 42a and 42b) of the filler 40 is attached to the object to be mounted. The mounting surface 100a (see FIG. 1) of the object 110 is elastically deformed in a state of being in close contact with each other. Therefore, the filler 40 is in close contact with the mounting surface 100a of the object 100 to be attached in a state where the contact area of the second region 42 is increased. As described above, the substrate 11 provided in the stuffing box main body 10 and the mounting surface 100a of the mounting object 100 are firmly sealed by the elastically deformed filler 40, so that higher water repellency is obtained. According to the cable stuffing box 1 having the filler 40 of the present embodiment, a higher level of water repellency can be obtained with respect to the degree of protection of waterproofing. Further, the degree of protection of the waterproof differs depending on the specifications of the cable stuffing box 1, and for example, the waterproofness of the IP68 level can also be obtained.

Next, other embodiments of the filler 40 will be described.

In the following description and the drawings, the same reference numerals are used to appropriately implement the same functions as those in the above-described embodiment of FIG. 4, or the same reference numerals are appropriately labeled at the end (the last two digits), and are appropriately omitted. Repeated instructions.

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

As shown in FIG. 5(B), the filler 140 of the present embodiment includes a first region 141 which is on the X1 side (the substrate 11 side), and a second region 142 which is on the X2 side (on the object 100 side). The first region 141 and the second region 142 are integrally formed of the aforementioned rubber material. Regarding the first region 141, the rubber material is uniformly formed. On the other hand, regarding the second region 142, the inside has a hollow structure. An air layer 142a is formed in the hollow portion of the second region 142. As shown in FIG. 5(A), the air layer 142a is formed in an annular shape along the circumferential direction of the filler 140. As described above, since the filler 140 of the present embodiment has the air layer 142a formed in the second region 142, the elastic modulus of the second region 142 is lower than that of the first region 141.

In the present embodiment, when the main body mounting portion 13 to which the filler 40 is attached is inserted into the cable take-out port 100b of the mounting object 100, and on the side of the mounting object 100, the second region 142 of the filler 140 (air layer 142a) It 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 is in close contact with the mounting surface 100a of the object 100 to be attached in a state where the contact area of the second region 142 is increased. As described above, in the present embodiment, the substrate 11 provided in the stuffing box main body 10 and the mounting surface 100a of the mounting object 100 are also firmly sealed by the elastically deformed filler 140, so that higher water repellency is obtained.

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

(A) to (C) of FIG. 6 are views showing an example of a case where the cable stuffing box 1 is attached to the mounting object 100 having a different thickness. In FIGS. 6(A) to 6(C), the distances L1, L2, and L3 of the engagement piece 130 are set to 1.3 mm, 2.0 mm, and 2.9 mm, respectively, and the thickness of the attachment object 100 is also set to 1.6 mm and 2.3 mm. 3.2mm. Further, these distances and thicknesses are an example and are not limited thereto. Further, as long as it is within the allowable range, a slight dimensional error is absorbed by the elastic force of the filler 40.

When the main body mounting portion 13 side of the cable stuffing box 1 is inserted into the cable take-out port 100b of the mounting object 100 (see FIG. 2) and strongly pressed toward the X2 side, the engaging piece 130 of the main body mounting portion 13 is When the inside of the outlet 100b is taken out by the cable, it is elastically deformed toward the inner side in the radial direction by the pressing force generated between the inner peripheral surface of the cable take-out port 100b. When the engagement piece 130 (any one step portion) of the main 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 at this position, the reset is restored to the specific filler. The outer peripheral surface of the body 10 is closer to the outer side.

As shown in FIG. 6(A), when the thickness of the object to be mounted 100 is 1.6 mm, the step portion 131 (distance L1) of the engagement piece 130 is pressed against the back surface 100c of the object 100. When it is released, it is reset to a portion outside the outer peripheral surface of the stuffing box main body 10 at this position, and is engaged with the back surface 100c of the mounting object 100. Further, before the step portion 131 passes over the back surface 100c of the object 100, the step portions 132 and 133 also pass over the back surface 100c of the object 100, but at this time, the cable stuffing box 1 is further pressed toward the X2 side, and thus the step portion 132 and 133 are not engaged with the back surface 100c of the object 100 to be mounted. Further, in FIG. 6(A), the cable CA inserted into the cable stuffing box 1 is indicated by an imaginary line (two-dot chain line).

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

As shown in FIG. 6(C), when the thickness of the object to be mounted 100 is 3.2 mm, the step portion 133 (distance L3) of the engaging piece 130 is pressed against the back surface 100c of the object 100. When it is released, it is reset to a portion outside the outer peripheral surface of the stuffing box main body 10 at this position, and is engaged with the back surface 100c of the mounting object 100. Further, when the thickness of the object 100 to be mounted is 3.2 mm, when the step portion 133 passes over the back surface 100c of the object 100, the cable stuffing box 1 cannot be pushed further toward the X2 side. Therefore, the cable stuffing box 1 is engaged with the back surface 100c of the mounting object 100 in the step portion 133.

In the above-described FIGS. 6(A) to 6(C), when the engaging piece 130 of the main body mounting portion 13 is engaged with the back surface 100c of the mounting object 100, the cable stuffing box 1 (substrate 11) and the mounting object are attached. The mounting surface 100a of 100 is firmly sealed by the elastically deformed filler 40, so that higher water repellency can be obtained.

In addition, after the cable stuffing box 1 is attached to the object 100 to be mounted, the cable CA (see FIG. 6(A)) is inserted from the cable insertion opening 30a (see FIG. 1) of the cover 30, and has a predetermined length. After the amount is sent to the opposite side, the cap 30 is placed on the male screw 122 of the cap mounting portion 12 (the stuffing box main body 10), and the male screw 122 is screwed into the female screw formed on the inner peripheral surface of the cover 30 on the X2 side. Then, the cover 30 is screwed in clockwise by a tool or the like, and the cover 30 is twisted into the X2 side, and a female screw (not shown) and a cover mounting portion formed on the inner circumferential surface of the cover 30 on the X2 side are formed. The male thread 122 of 12 (filler body 10) is fastened.

When the cover 30 is screwed in, the inner peripheral surface of the portion formed substantially in the spherical shape on the X1 side of the cover 30 is in contact with the plurality of contact pieces 121 (see FIG. 1) provided on the X1 side of the cover attaching portion 12. The plurality of contact pieces 121 are pressed toward the inner side in the radial direction. This pressing causes the plurality of contact pieces 121 to be elastically deformed toward the inner side in the radial direction. When the plurality of contact pieces 121 are elastically deformed toward the inner side in the radial direction, the sleeve 20 provided on the inner circumferential surface of the lid attachment portion 12 is uniformly pressed toward the inner side in the radial direction. Thereby, the outer circumferential surface of the cable into which the sleeve 20 is inserted is firmly adhered to the inner circumferential surface of the sleeve 20, and thus the cable is fixed inside the cable stuffing box 1. By fixing the cable, water, oil, dust, and the like are prevented from intruding from the cable insertion opening 30a of the cover 30, and the cable is prevented from being slack due to vibration, and the position of the cable is deviated due to stretching.

As described above, the cable stuffing box 1 of the present embodiment can be attached to the mounting object 100 in a one-touch manner. In addition, when the cable stuffing box 1 is attached to the object 100 to be mounted, the cable stuffing box 1 (substrate 11) and the mounting surface 100a of the object 100 are firmly sealed by the elastically deformed filler 40. Therefore, after the mounting, it is possible to obtain higher water repellency without further screwing in by the locknut.

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

Further, in order to improve the water repellency, a female screw thread is formed in the cable take-out port 100b of the object 100, and a male thread is formed in the cable stuffing box to thread the female thread with the male thread. . However, in the cable stuffing box 1 of the present embodiment, even if neither the mounting object 100 nor the stuffing box main body 10 is formed with a thread, a higher waterproof property is obtained, so that the structure can be simplified, and Can improve operability. Further, since the cable stuffing box 1 of the present embodiment can be attached to the conventional mounting object 100 in which the female screw thread is formed in the cable take-out port 100b, it can be used in more places and applications.

Next, the installation and disassembly of the cable stuffing box 1 will be described.

FIG. 7 is a perspective view showing one example of the installation tool 200. 8(A) and 8(B) are views showing a mounting method of mounting the cable stuffing box 1 by the mounting 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 that is struck by a tool such as a hammer in a state of abutting against the head (cover 30) of the cable stuffing box 1. In the pressing portion 210 of the present embodiment, cable holes 211, 213, and 215 (hereinafter also simply referred to as "cable holes") are provided. Cables with different diameters are embedded in each cable hole. The cable hole 211 is a hole in which the smallest diameter cable 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 largest diameter cable is embedded. In addition, in FIG. 7, although the example which provided three types of cable-holes in the press part 210 is shown, the magnitude|

Groove portions 212, 214, and 216 (hereinafter also simply referred to as "groove portions") are provided in the respective cable holes. The groove portion penetrates from the side surface of the pressing portion 210 to the cable hole. As will be described later, since the pressing portion 210 is formed of hard rubber or the like, the mounting tool 200 can be fitted into the cable into which the cable stuffing box 1 is inserted by enlarging the interval between the groove portions. Further, in a state where the cable is embedded in the cable hole, the mounting tool 200 can be detached from the cable inserted into the cable stuffing box 1 by enlarging the interval between the groove portions.

The grip 220 is the grip portion of the mounting tool 200. The operator grips the grip portion 220 by hand, whereby the mounting tool 200 can be supported. The pressing portion 210 and the grip portion 220 are integrally formed of hard rubber or the like. As the thickness of the mounting tool 200, as an example, about 5 to 7 mm is cited.

When the cable stuffing box 1 is attached to the mounting object 100, as shown in FIG. 8(A), the main body mounting portion 13 of the cable stuffing box 1 is inserted into the cable take-out port 100b of the mounting object 100. Thereby, the cable stuffing box 1 is temporarily fixed to the cable take-out port 100b. In this state, the mounting tool 200 (for example, the cable hole 215) is embedded in the cable CA into which the cable stuffing box 1 is inserted. Further, the pressing portion 210 of the mounting tool 200 is tapped (pressed) in the X2 direction by a hammer (not shown). As a result, as shown in FIG. 8B, the engaging piece 130 of the main body mounting portion 13 of the mounting object 100 is engaged with the back surface 100c of the mounting object 100, so that the cable stuffing box 1 can be attached to the mounting. Object 100. Subsequently, by expanding 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 addition, in FIG. 8, an example in which the cable stuffing box 1 in which the cable CA is inserted is attached to the mounting object 100 is explained, but the cable stuffing box 1 in which the cable CA is not inserted (before insertion) is explained. When the object to be attached 100 is attached, the pressing portion 210 of the mounting tool 200 is brought into contact with the lid 30 of the cable stuffing box 1, and the hammer may be tapped in the X2 direction.

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

When the cable stuffing box 1 is detached from the mounting object 100, by using the detaching tool 300 as shown in FIG. 9(A), the cable stuffing box 1 can be detached more easily and reliably. The detaching tool 300 is a substantially cylindrical member, and an annular pressing plate 301 is provided at one end portion. The pressing plate 301 is a portion that is struck by a tool such as a hammer. An opening 301a is provided in a central portion of the pressing plate 301. As will be 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 detaching tool 300 includes a pressing plate 301 integrally formed of metal, resin, or the like.

When the cable stuffing box 1 is detached from the mounting object 100, as shown in FIG. 9(A), the detaching tool 300 is placed on the main body mounting portion 13 of the cable stuffing box 1 attached to the mounting object 100. Thereby, the removal tool 300 is in a state of being temporarily fixed to the main body attachment portion 13. In this state, the pressing plate 301 is tapped in the X1 direction by a hammer (not shown), and the detaching tool 300 is moved to the X1 side. When the end portion on the X1 side of the detaching tool 300 reaches the back surface 100c of the mounting object 100, as shown in FIG. 9(B), the engaging piece 130 provided in the main body mounting portion 13 of the cable stuffing box 1 faces in the radial direction. The inner side is elastically deformed. Thereby, the engagement of the engagement piece 130 with the back surface 100c of the attachment object 100 is released, and the cable stuffing box 1 can move in the X1 direction. Further, by inserting a tool (not shown) such as a screwdriver from the opening 301a (pressing plate 301) of the detaching tool 300, the main body mounting portion 13 of the cable stuffing box 1 is press-fitted toward the X1 side, thereby enabling the cable packing. Letter 1 is launched from the X1 side. In this case, it is not necessary to arrange an operator for pulling out the cable stuffing box 1 on the mounting surface 100a side of the mounting object 100, and thus the detaching operation of the cable stuffing box 1 can be performed by one operator. Further, in the state shown in FIG. 9(B), the cable stuffing box 1 may be pulled out from the mounting surface 100a side of the mounting object 100 in the X1 direction without using a tool.

Further, in FIG. 9, an example in which the cable stuffing box 1 in which the cable CA is not inserted is detached from the mounting object 100 has been described, but the cable packing in which the cable CA is inserted can also be inserted in the same order. The letter 1 is detached from the object 100 to be mounted.

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 mounting portion 13 of the cable stuffing box 1. In FIG. 9(A), it is shown as L4=L5. With such a configuration, when the detaching tool 300 is hit with a hammer, the engaging piece 130 (the main body mounting portion 13) of the cable stuffing box 1 can be elastically deformed more reliably toward the inner side in the radial direction.

(Second embodiment)

In the cable stuffing box 1A of the second embodiment, the points at which the engagement pieces are arranged in two rows are different from those of the first embodiment. In the cable stuffing box 1A of the second embodiment, the other configuration is the same as that of the first embodiment. Therefore, in FIG. 10, only the main body mounting portion 13A and its periphery are mainly illustrated, and the entire illustration of the cable stuffing box 1A is omitted. In the description of the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and the overlapping description will be omitted.

As shown in FIG. 10, in the cable stuffing box 1A of the second embodiment, the two types of engagement pieces 130 are provided in two rows along the circumferential direction of the main body attachment portion 13A. Here, one of the engaging pieces 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.

In the engagement piece 130A, the plurality of step portions 131 to 133 are provided in a stepped shape. The step portions 131 to 133 are the same as the step portions 131 to 133 shown in FIG. 2 (the first embodiment), and the distance from the filler surface 40a is formed to be L1 to L3, respectively.

In the engaging piece 130B, the plurality of step portions 137 to 139 are provided in a stepped shape. The distances L between the step portions 137 to 139 and the filler surface 40a are different (L7 to L9). Each distance is set in accordance with the thickness of the object to be mounted 100 to which the cable stuffing box 1 is attached. For example, when the distances L7, L8, and L9 are 4.2 mm, 5.7 mm, and 8.7 mm, respectively, the cable stuffing box 1A can be attached to three types (4.5 mm, 6.0 mm, 9.0 mm) having different thicknesses. The object 100 is mounted. In other words, in the above-described two types of engagement pieces 130A and 130B, the position of each step portion from the filler face 40a is different in the penetration direction of the cable in the body attachment portion 13.

As described above, the cable stuffing box 1A of the second embodiment can be attached to the mounting object 100 having a thickness of 1.6 mm, 2.3 mm, and 3.2 mm in the engaging piece 130A, and can be attached to the thickness of the engaging piece 130B. The object to be mounted 100 is 4.5 mm, 6.0 mm, and 9.0 mm. Therefore, the cable stuffing box 1A of the second embodiment can be attached to the six types of mounting objects 100 having different thicknesses.

Further, when six kinds of step portions are provided on one of the engagement pieces 130, the amount of elastic deformation of the engagement piece 130 is increased, and the load of the engagement piece 130 is increased. Therefore, breakage of the engaging piece 130 may also be caused. Further, since the amount of elastic deformation of the engaging piece 130 is increased, it is also possible to restrict the outer diameter of the inserted cable so that the elastically deformed engaging piece 130 does not interfere with the cable. However, in the cable stuffing box 1A of the second embodiment, since the engagement pieces are provided in two rows (130A, 130B), the load of the engagement pieces 130A and 130B is not increased, and the damage of the engagement piece 130 can be suppressed. . Further, according to the present embodiment, since the amount of elastic deformation of the engagement pieces 130A and 130B does not become large, the restriction of the outer diameter of the inserted cable can be made small.

(Third embodiment)

Fig. 11 is a view showing a cable stuffing box 1B according to a third embodiment. Fig. 11 is a view when the cable stuffing box 1B is viewed from the X2 side.

The cable stuffing box 1B of the third embodiment differs from the first embodiment in that the two types of engaging pieces having different sizes are provided. In the cable stuffing box 1B of the third embodiment, the other configuration is the same as that of the first embodiment. Therefore, in FIG. 11, only the main body mounting portion 13B and its periphery are mainly illustrated, and the entire illustration of the cable stuffing box 1B is omitted. In the description of the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals as in the first embodiment, and the overlapping description will be omitted.

As shown in FIG. 11, in the cable stuffing box 1B of the third embodiment, the engagement pieces 130 and 130C are provided at six locations along the circumferential direction of the main body attachment portion 13B. Among them, the engagement piece 130 is the same as the engagement piece 130 of the first embodiment. The engaging piece 130C is formed such that the height of the step portion (omitted from the reference numeral) is lower than that of the engaging piece 130. In the engagement piece 130C, the distance from the filler surface 40a (see FIG. 2) is the same as that of the engagement piece 130. The engagement pieces 130 and 130C are alternately arranged at six intervals at equal intervals along the circumferential direction of the main body attachment portion 13 (one centered on the center line C and provided at every 60 degrees).

As described above, in the cable stuffing box 1B of the third embodiment, a plurality of types of engaging pieces having different sizes are provided along the circumferential direction of the main body mounting portion 13B. Therefore, when the cable stuffing box 1B is attached to the mounting object 100, the engaging piece 130C having a lower height than the engaging piece 130 can be pressed into the mounting object 100 with a smaller pressing force than the engaging piece 130. Therefore, the cable stuffing box 1B can be attached to the mounting object 100 with a smaller pressing force than the configuration in which the engaging piece 130 of the first embodiment is provided in six places. Further, since the engagement pieces 130 and 130C are alternately arranged at equal intervals along the circumferential direction of the main body attachment portion 13, the fixing force in the circumferential direction of the main body attachment portion 13 can be equalized.

The embodiment of the present invention has been described above, but the present invention is not limited to the above-described embodiment, and various modifications and changes can be made as in the above-described modifications, and they are also included in the technical scope of the present invention. In addition, the effects described in the examples are merely the most suitable effects produced by the present invention, and are not limited to the effects described in the embodiments. Further, the above-described embodiments and the modifications described later can be used in combination as appropriate, but detailed descriptions thereof will be omitted.

(deformation method)

The configuration may be such that an annular groove is formed on the surface of the substrate 11 (filler body 10) on the X2 side, and the first region 41 side of the filler 40 (140) is buried in the groove. With such a configuration, the positional deviation of the filler 40 (140) can be suppressed.

In the filler 40 shown in FIG. 4, the cross sections of the elastic portions 42a and 42b are not limited to a substantially circular shape, and may be polygonal (for example, octagonal or the like), or elliptical or the like. In addition, the arrangement of the elastic portions 42a and 42b is not limited to the example shown in FIG. For example, the positions of the elastic portions 42a and 42b may be alternately different in the thickness direction (X direction) of the filler 40, or may be provided in two rows in the circumferential direction of the filler 40.

Further, in the filler 140 shown in FIG. 5, the first region 141 and the second region 142 may be formed of other materials. In this case, the first region 141 and the second region 142 are bonded by an adhesive or the like, and can be configured as one filler 140. Further, the second region 142 of the filler 140 is not limited to the hollow structure, and may be made of, for example, a material having a lower modulus of elasticity than the first region 41.

The plurality of engagement pieces 130 (see FIG. 3 ) may be provided at least two locations at equal intervals along the circumferential direction of the stuffing box body 10 . Further, the plurality of engagement pieces 130 may be provided at three positions at equal intervals along the circumferential direction of the stuffing box main body 10.

Further, in the second embodiment, an example in which two rows of the engagement pieces 130 are provided has been described. However, the present invention is not limited thereto, and three columns may be provided. Further, the number of step portions in one of the engagement pieces 130 may be at least two, and may be four or more.

[Label Description]

1, 1A: cable stuffing box, 10: stuffing box body, 11: substrate, 12: cover mounting part, 13: main body mounting part, 13a, 13b: groove part, 20: sleeve, 30: cover, 40, 140 : filler, 41, 141: first area, 42, 142: second area, 130, 130A, 130B, 130C: engaging piece, 131~133, 137~139: step, 200: installation tool, 300: disassembly tool

Claims

A cable stuffing box, installed in an opening of an object to be mounted, and holding a cable inserted therein, the cable stuffing box having:

The substrate faces the first surface of the object to be mounted;

a cable holding portion disposed on one side of the substrate to hold the inserted cable;

The main body mounting portion is provided on the other side of the substrate, and has a plurality of engaging pieces that can be engaged with the second surface on the opposite side of the first surface of the mounting object;

a ring-shaped filler is mounted between the substrate and the object to be mounted in the body mounting portion,

In the engagement piece of the main body mounting portion, a plurality of step portions that can be engaged with the second surface of the mounting object having different thicknesses are along a through direction of the cable in the main body mounting portion. Stepped setting,

The filler is formed such that the elastic modulus of the region on the side of the object to be mounted is lower than the region on the side of the substrate. .
The cable stuffing box of claim 1 wherein:

A plurality of the engaging pieces are disposed along a circumferential direction of the main body mounting portion, and positions of the step portions on the plurality of engaging pieces are respectively in a passing direction of the cable of the main body mounting portion Not the same.
The cable stuffing box according to claim 2, wherein:

A groove portion is provided between the plurality of the engaging pieces.
A cable stuffing box according to any one of claims 1 to 3, characterized in that:

a plurality of the engagement pieces are provided along a circumferential direction of the main body attachment portion, and one of the pair of the engagement pieces that face the central axis of the main body attachment portion The step portion of the spliced piece is smaller than the step portion of the other of the engaging pieces.
A cable stuffing box according to any one of claims 1 to 4, characterized in that:

In the filler, a part of the object side is provided with a plurality of elastic portions having a hollow structure.