Wiring insertion tool

Abstract

To regulate the position of wiring in the circumferential direction of an insertion body.SOLUTION: In an electric wire insertion tool 10, an electric wire 14 is inserted into a body 16, a seal member 30, and a holder 34, the seal member 30 seals between the body 16 and the electric wire 14, and the holder 34 holds the seal member 30. Here, the seal member 30 and the holder 34 restrict the rotation of the electric wire 14 in the circumferential direction of the main body 16. Therefore, the position of the electric wire 14 in the circumferential direction of the main body 16 can be defined.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a wire insertion tool in which a wire is inserted into an inserting body. [Background technology]

[0002] In the cable gland described in Patent Document 1 below, a cable is inserted through a gland body, a sleeve, a cap, and a washer, and the sleeve seals between the gland body and the cable, while the cap and washer are attached to the gland body to hold the sleeve.

[0003] In this cable gland, the sleeve is rotatable in the circumferential direction of the gland body, and the cable is rotatable in the circumferential direction of the gland body relative to the cap and the washer. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-239530 Summary of the Invention [Problem to be solved by the invention]

[0005] SUMMARY OF THE INVENTION In consideration of the above, an object of the present invention is to provide a wire insertion tool that can define the position of a wire in the circumferential direction of an insertion body. [Means for solving the problem]

[0006] A first aspect of the wire insertion device of the present invention comprises an insertion body through which a wire is inserted, a sealing member through which the wire is inserted and which seals the gap between the insertion body and the wire, and a holding member through which the wire is inserted and which is attached to the insertion body to hold the sealing member, and at least one of the sealing member and the holding member restricts rotation of the wire in the circumferential direction of the insertion body.

[0007] A second aspect of the present invention is a wiring insertion device in which, in the first aspect of the present invention, at least one of the sealing member and the retaining member restricts the rotation of the insertion body in the circumferential direction at the peripheral surface, thereby restricting the rotation of the wiring in the circumferential direction of the insertion body.

[0008] A third aspect of the present invention is the wire insertion tool of the first or second aspect of the present invention, wherein the holding member is attached to the inserting body by elastic engagement.

[0009] A fourth aspect of the present invention is a wiring insertion device which is any one of the first to third aspects of the present invention, and which is provided with a plurality of insertion holes provided in at least one of the sealing member and the holding member, through which the wiring is inserted and whose rotation in the circumferential direction of the insertion body is restricted relative to at least one of the sealing member and the holding member. [Effects of the Invention]

[0010] In the first aspect of the wire insertion device of the present invention, a wire is inserted through an insert, a seal member, and a retaining member, the seal member seals between the insert and the wire, and the retaining member is attached to the insert to hold the seal member.

[0011] Here, at least one of the seal member and the holding member restricts rotation of the wire in the circumferential direction of the inserting body, thereby defining the position of the wire in the circumferential direction of the inserting body.

[0012] In the wire insertion device of the second aspect of the present invention, the peripheral surface of at least one of the seal member and the holding member is restricted from rotating in the circumferential direction of the inserter, thereby restricting rotation of the wire in the circumferential direction of the inserter. Therefore, rotation of at least one of the seal member and the holding member in the circumferential direction of the inserter can be effectively restricted, and rotation of the wire in the circumferential direction of the inserter can be effectively restricted.

[0013] In the wire insert of the third aspect of the present invention, the holding member is attached to the inserter by elastic engagement, so that the holding member can be attached to the inserter without rotating it.

[0014] In the fourth aspect of the wire insertion tool of the present invention, a wire is inserted into an insertion hole in at least one of the sealing member and the holding member, and rotation of the wire in the circumferential direction of the inserter relative to at least one of the sealing member and the holding member is restricted.

[0015] Here, a plurality of insertion holes are provided, so that the positions of the plurality of wires in the circumferential direction of the insertion body can be defined. [Brief explanation of the drawings]

[0016] [Figure 1] 1 is a front perspective view showing an assembled state of a wire insertion tool according to an embodiment of the present invention. [Figure 2] 1 is a front perspective view showing a wire insertion tool according to an embodiment of the present invention. [Figure 3] 1 is an exploded perspective view of a wire insertion tool according to an embodiment of the present invention, as viewed from the front. [Figure 4] 1A is a cross-sectional view showing a state in which an electric wire is inserted through an electric wire insertion tool according to an embodiment of the present invention, and FIG. 1B is a cross-sectional view showing the electric wire insertion tool according to an embodiment of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0017] Fig. 1 shows a front perspective view of an assembled wire insertion tool 10 as a wire insertion tool according to an embodiment of the present invention. Furthermore, Fig. 2 shows a front perspective view of the wire insertion tool 10, and Fig. 3 shows a front perspective view of the wire insertion tool 10. In the drawings, the front of the wire insertion tool 10 is indicated by an arrow FR.

[0018] As shown in Fig. 1, the wire insertion tool 10 according to this embodiment is attached to a peripheral wall 12A of a housing 12, which is the object of attachment, and an electrical device (not shown) is housed inside the housing 12. A substantially cylindrical assembly tube (not shown) is integrally provided with the peripheral wall 12A of the housing 12, and the interior of the assembly tube connects the interior of the housing 12 to the outside of the housing 12. The assembly tube protrudes into the housing 12, and a female thread is formed on the inner peripheral surface of the assembly tube. A predetermined number (four in this embodiment) of electric wires 14 (cables) serving as wiring are electrically connected to the electrical device, and the electric wires 14 extend outside the housing 12 through the interior of the assembly tube.

[0019] 1 to 3, the wire insertion device 10 is provided with a generally cylindrical main body 16 as an insertion body, and a male thread 16A is formed on the outer peripheral surface of the rear portion of the main body 16. The male thread 16A is threadedly engaged with a female thread of the housing 12 (an assembly cylinder of the peripheral wall 12A), thereby assembling the wire insertion device 10 to the peripheral wall 12A of the housing 12.

[0020] A generally annular plate-shaped flange 16B is integrally provided at the middle portion of the main body 16 in the front-rear direction (axial direction), and the flange 16B protrudes coaxially radially outward from the main body 16. The rear portion of the main body 16 is penetrated by an annular O-ring 18 serving as an assembly seal member. The O-ring 18 is made of, for example, rubber and has sealing properties. The O-ring 18 is sandwiched between the flange 16B and the peripheral wall 12A of the housing 12 and elastically contracts, thereby providing a seal between the main body 16 and the peripheral wall 12A of the housing 12.

[0021] The front portion of the main body 16 (the portion forward of the flange 16B) is a rectangular inner cylinder 16C. A substantially hexagonal outer cylinder 16D is integrally provided on the front side of the flange 16B, radially outward of the inner cylinder 16C, as a mounting portion. The outer cylinder 16D is disposed coaxially with the flange 16B and the inner cylinder 16C and protrudes forward from the inner cylinder 16C. A pair of substantially rectangular engagement holes 20 are formed through the front portion of the outer cylinder 16D as engaged portions, and the pair of engagement holes 20 are located on opposite sides of the outer cylinder 16D in the radial direction. Rectangular openings 22 are formed through the outer cylinder 16D on the rear side of each engagement hole 20, and the rear surface of the openings 22 forms the front surface of the flange 16B. A pair of substantially rectangular insert pillars 16E serving as engaged portions are integrally provided on the inner peripheral surface of the outer cylinder 16D, and the pair of insert pillars 16E are disposed at positions opposite each other in the radial direction of the outer cylinder 16D.

[0022] A rectangular plate-shaped partition wall 16F (see FIGS. 4A and 4B) serving as a retaining portion is integrally provided within the inner tube 16C of the main body 16 near the front side of the flange 16B. The partition wall 16F is disposed coaxially with the inner tube 16C and divides the interior of the main body 16 in the front-to-rear direction. A predetermined number (four in this embodiment) of circular through holes 24 are formed through the partition wall 16F, and the predetermined number of through holes 24 are disposed at equal intervals in the circumferential direction of the partition wall 16F. A predetermined number of electric wires 14 are inserted (substantially fitted) within the main body 16, and the electric wires 14 pass through the partition wall 16F via the through holes 24.

[0023] A substantially rectangular column-shaped arrangement column 16G is integrally provided on the rear side of the partition wall 16F. The arrangement column 16G is arranged coaxially with the partition wall 16F and extends rearward. A predetermined number of arrangement recesses 26 (four in this embodiment) are formed on the circumferential surface of the arrangement column 16G. The predetermined number of arrangement recesses 26 extend in the front-rear direction and are arranged at equal intervals around the circumferential direction of the arrangement column 16G. The circumferential surface of the arrangement recess 26 is curved in an arc-shaped cross section and is flush with the circumferential surface of the through-hole 24 of the partition wall 16F. The rear portion of the arrangement column 16G has a reduced diameter, and the entire periphery of the circumferential surface near the rear portion of the arrangement column 16G (including the arrangement recess 26) is formed as an inner inclined surface 16H that is inclined radially inward of the arrangement column 16G as it extends rearward.

[0024] A predetermined number (four in this embodiment) of triangular prism-shaped locking protrusions 16I are integrally provided on the inner peripheral surface of the main body 16, rearward of the inner inclined surface 16H of the arrangement pillar 16G, and the predetermined number of locking protrusions 16I are arranged at equal intervals in the circumferential direction of the main body 16. The positions of the locking protrusions 16I in the circumferential direction of the main body 16 are circumferential positions between the arrangement recesses 26 of the arrangement pillar 16G, and the rear surfaces of the locking protrusions 16I are inclined inward in the radial direction of the main body 16 as they extend forward, and the front surfaces of the locking protrusions 16I are arranged perpendicular to the front-to-rear direction.

[0025] A substantially cylindrical holding component 28 serving as a locking member is inserted into the main body 16 from the rear side. A predetermined number (four in this embodiment) of substantially triangular prism-shaped locking claws 28A are formed on the front portion of the holding component 28, and the predetermined number of locking claws 28A are arranged at equal intervals around the circumferential direction of the main body 16 and protrude radially outward from the holding component 28. The front surfaces of the locking claws 28A are inclined in a direction toward the radially outward side of the holding component 28 as they extend rearward, and the rear surfaces of the locking claws 28A are arranged vertically in the front-to-rear direction. When retaining component 28 is inserted into main body 16 from the rear side, the front surface of locking claw 28A slides against the rear surface of locking projection 16I of main body 16, and locking claw 28A is temporarily elastically tilted radially inward of retaining component 28, whereby the rear surface of locking claw 28A engages with the front surface of locking projection 16I and retains retaining component 28 against rearward movement relative to main body 16 (retaining component 28 is attached to main body 16). An outer inclined surface 28B is formed on the inner peripheral surface of retaining component 28 around the entire rear side of locking claw 28A, and outer inclined surface 28B is inclined radially inward of retaining component 28 as it extends rearward.

[0026] A predetermined number of electric wires 14 are inserted into the holding component 28, and the electric wires 14 pass between the locking claws 28A of the holding component 28 and are arranged in the arrangement recess 26 of the main body 16 (arrangement column 16G). The electric wires 14 are extended in a direction toward the inside in the radial direction of the main body 16 and the holding component 28 as they move rearward by the inner inclined surface 16H of the arrangement column 16G and the outer inclined surface 28B of the holding component 28, and the electric wires 14 are bent in front of the inner inclined surface 16H and at the rear of the outer inclined surface 28B, and are thereby held to the main body 16 by the holding component 28, with their movement in the front-to-rear direction being restricted.

[0027] A sealing member 30 having a generally rectangular columnar shape is inserted (press-fitted) into the inner tube 16C of the main body 16 from the front side. The sealing member 30 is made of, for example, rubber and has sealing properties. A pair of outer protrusions 30A with a triangular cross section is formed on the circumferential surface of the sealing member 30. The pair of outer protrusions 30A extend around the entire circumference of the sealing member 30 and are aligned in the front-to-rear direction. The outer protrusions 30A are in elastic contact with the inner circumferential surface of the inner tube 16C, which restricts rotation of the sealing member 30 around the main body 16 while the sealing member 30 is elastically contracted radially inward by the inner tube 16C.

[0028] The seal member 30 has a predetermined number (four in this embodiment) of circular seal holes 32 formed therethrough as insertion holes, and the predetermined number of seal holes 32 are arranged at equal intervals in the circumferential direction of the seal member 30. A pair of inner protrusions 32A with a triangular cross section is formed on the circumferential surface of the seal hole 32, and the pair of inner protrusions 32A extend around the entire circumference of the seal hole 32 and are aligned in the front-to-rear direction. The seal hole 32 is arranged coaxially with the through hole 24 of the inner cylinder 16C (partition wall 16F), and the electric wire 14 is inserted (press-fitted) into the seal hole 32. The inner protrusions 32A are in elastic contact with the electric wire 14, so that the seal member 30 seals between the main body 16 and the electric wire 14 when elastically contracted in the radial direction by the electric wire 14.

[0029] A substantially hexagonal plate-shaped holder 34 serving as a holding member is inserted (fitted) from the front side into the outer tube 16D of the main body 16. A pair of substantially rectangular insertion holes 36 are formed through the outer periphery of the holder 34, and the pair of insertion holes 36 are positioned on opposite sides in the radial direction of the holder 34. Insertion posts 16E of the outer tube 16D are inserted into the insertion holes 36, thereby defining the circumferential position of the holder 34 relative to the outer tube 16D.

[0030] A pair of substantially rectangular forming holes 38 are formed through the holder 34, and the pair of forming holes 38 are arranged at positions opposite each other in the radial direction of the holder 34, and are communicated with the opening 22 of the outer tube 16D through the gap between the inner tube 16C and the outer tube 16D of the main body 16. The forming holes 38 extend along the side surface of the holder 34, and the holder 34 is formed with an engagement plate 34A having a substantially U-shaped cross section and serving as an elastic part, radially outward from the forming holes 38. A triangular prism-shaped engagement claw 34B serving as an engagement part is integrally formed at the longitudinal center of the engagement plate 34A, and the engagement claw 34B protrudes radially outward from the holder 34. The rear surface of locking claw 28A is inclined toward the radially outward side of holder 34 as it moves forward, and the front surface of locking claw 28A is positioned vertically in the front-to-back direction.When holder 34 is inserted into outer tube 16D, the rear surface of locking claw 34B slides against the inner surface of outer tube 16D, and locking plate 34A is temporarily elastically deformed radially inward of holder 34, causing the front surface of locking claw 34B to engage with the front surface of locking hole 20 of outer tube 16D, preventing forward movement of holder 34 relative to outer tube 16D (holder 34 is attached to outer tube 16D).

[0031] A central portion of the holder 34 (a portion radially inward from the forming hole 38) covers the seal member 30 and the inner tube 16C from the front side, and the holder 34 restricts the movement of the seal member 30 toward the front side in the central portion, thereby holding the seal member 30 to the main body 16. A predetermined number (four in this embodiment) of circular fitting holes 40 serving as insertion holes are formed penetrating the central portion of the holder 34, and the predetermined number of fitting holes 40 are arranged at equal intervals in the circumferential direction of the holder 34. The fitting holes 40 are arranged coaxially with the seal hole 32 of the seal member 30, and the electric wires 14 are approximately fitted into (inserted through) the fitting holes 40.

[0032] Next, the operation of this embodiment will be described.

[0033] When assembling the wire insertion tool 10 configured as described above, for example, with the rear portion of the main body 16 inserted into the O-ring 18, the outer tube 16D of the main body 16 is rotated with a tool (e.g., a wrench) so that the male threads 16A of the main body 16 are threaded into the female threads of the assembly tube of the housing 12. A predetermined number of electric wires 14 are inserted from inside the housing 12 into the retaining part 28 and the main body 16 (including the inner tube 16C) and extended to the outside of the housing 12. At this time, inside the main body 16, the electric wires 14 are inserted into the through-holes 24 of the partition wall 16F in the inner tube 16C. Furthermore, with the electric wire 14 inserted into the seal hole 32 of the seal member 30, the seal member 30 is inserted into the inner tube 16C of the main body 16, and with the electric wire 14 inserted into the fitting hole 40 of the holder 34, the engagement claws 34B of the holder 34 engage with the engagement holes 20 of the main body 16 (outer tube 16D), and the holder 34 is attached to the outer tube 16D of the main body 16.

[0034] Then, with the wire 14 disposed between the locking claws 28A of the holding part 28, the locking claws 28A are engaged with the locking projections 16I of the main body 16, and the holding part 28 is attached to the main body 16.

[0035] Here, the seal member 30 is restricted from rotating in the circumferential direction of the main body 16, and the electric wire 14 is restricted from rotating in the circumferential direction of the main body 16 relative to the seal member 30 (seal hole 32), so that the seal member 30 restricts the rotation of the electric wire 14 in the circumferential direction of the main body 16. Furthermore, the holder 34 is restricted from rotating in the circumferential direction of the main body 16, and the electric wire 14 is restricted from rotating in the circumferential direction of the main body 16 relative to the holder 34 (fitting hole 40), so that the holder 34 restricts the rotation of the electric wire 14 in the circumferential direction of the main body 16. Therefore, the position of the electric wire 14 in the circumferential direction of the main body 16 can be defined, and the electric wire 14 can be easily routed outside the housing 12.

[0036] Furthermore, the seal member 30 is restricted from rotating in the circumferential direction of the main body 16 at its peripheral surface (external protrusion 30A), thereby restricting rotation of the wires 14 in the circumferential direction of the main body 16. Furthermore, the holder 34 is restricted from rotating in the circumferential direction of the main body 16 at its peripheral surface (side surface), thereby restricting rotation of the wires 14 in the circumferential direction of the main body 16. Therefore, rotation of the seal member 30 and the holder 34 in the circumferential direction of the main body 16 can be effectively restricted, and the seal member 30 and the holder 34 can effectively restrict rotation of the wires 14 in the circumferential direction of the main body 16.

[0037] Furthermore, a plurality of seal holes 32 are provided in the seal member 30, and a plurality of fitting holes 40 are provided in the holder 34. Therefore, the positions of the plurality of electric wires 14 in the circumferential direction of the main body 16 can be defined.

[0038] Furthermore, the engaging claws 34B of the holder 34 (engaging plate 34A) are engaged with the engaging holes 20 of the main body 16 (outer cylinder 16D) due to elastic deformation of the engaging plate 34A, and the holder 34 is attached to the main body 16. Therefore, the holder 34 can be easily attached to the main body 16 without rotating (screwing) it, and the attachment of the holder 34 to the main body 16 can be prevented from being hindered by the electric wire 14 in the fitting hole 40.

[0039] Furthermore, the holder 34 covers the front side of the seal member 30. Therefore, when the wire insertion tool 10 is subjected to high-pressure water from the front side, the seal member 30 is prevented from being subjected to water pressure, and deformation and damage to the seal member 30 can be prevented.

[0040] Furthermore, the forming hole 38 of the holder 34 is connected to the opening 22 of the outer cylinder 16D via the gap between the inner cylinder 16C and the outer cylinder 16D of the main body 16. Therefore, if water seeps into the gap between the inner cylinder 16C and the outer cylinder 16D of the main body 16 from the forming hole 38 of the holder 34, the water can be discharged outside the main body 16 from the opening 22 of the outer cylinder 16D.

[0041] Furthermore, outer protrusions 30A on the circumferential surface of seal member 30 are in elastic contact with main body 16 (inner cylinder 16C), and inner protrusions 32A on the circumferential surface of seal hole 32 of seal member 30 are in elastic contact with electric wire 14, causing seal member 30 to elastically contract in the radial direction. Therefore, seal member 30 can effectively seal between main body 16 and electric wire 14, and effectively restrict water from entering housing 12 through main body 16.

[0042] In this embodiment, the male thread 16A of the main body 16 is threaded into the female thread of the assembly tube of the housing 12. However, the assembly tube may not be provided on the housing 12, and the male thread 16A of the main body 16 may be threaded into the female thread on the inner circumferential surface of the nut.

[0043] In addition, in this embodiment, a holding component 28 is provided. However, the holding component 28 does not necessarily have to be provided.

[0044] Furthermore, in this embodiment, the seal member 30 and the holder 34 restrict rotation of the wire 14 in the circumferential direction of the main body 16. However, it is sufficient that at least one of the seal member 30 and the holder 34 restricts rotation of the wire 14 in the circumferential direction of the main body 16. [Explanation of symbols]

[0045] 10 wire insertion tool (wiring insertion tool), 14 wire (dashed line), 16 main body (insertion body), 30 seal member, 32 seal hole (insertion hole), 34 holder (holding member), 40 fitting hole (insertion hole)

Claims

1. an inserting body through which a wiring is inserted; a seal member through which the wiring is inserted and which seals between the insert and the wiring; a holding member through which the wiring is inserted and attached to the inserting body to hold the seal member; wherein at least one of the seal member and the holding member restricts rotation of the wire in the circumferential direction of the inserting body.

2. 2. The wire insertion tool according to claim 1, wherein at least one of the seal member and the holding member restricts the rotation of the inserter in the circumferential direction thereof at a peripheral surface thereof, thereby restricting the rotation of the wire in the circumferential direction of the inserter.

3. 2. The wire insert according to claim 1, wherein the holding member is attached to the insert by elastic engagement.

4. A wiring insertion device as described in claim 1, which has a plurality of insertion holes provided in at least one of the sealing member and the holding member, through which the wiring is inserted and whose rotation in the circumferential direction of the insertion body is restricted relative to at least one of the sealing member and the holding member.

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