JPH0783217A - Control cable terminal structure - Google Patents

Abstract

(57) [Summary] [Purpose] To ensure a reliable seal even when the outer tube end is cut obliquely or has burrs. [Structure] As shown in (A), the center hole 2 is formed in the contact surface 22 of the rubber seal member 21 with the end surface of the outer tube 2.
A ridge 2 having a triangular cross section at a position slightly outside the rim of the mouth 3
4 is formed all over the circumference. When the end of the outer tube 2 is obliquely cut as shown in (B), when the metal cap 7 is fitted and the seal member 21 is pressed against the end surface of the outer tube 2, the protrusion 24 of the seal member 21 is pressed.
While being elastically deformed to a greater extent in a portion corresponding to the protruding portion of the end surface of the outer tube 2, the outer tube 2 is closely attached over the entire circumference of the end surface.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control cable terminal structure in which an inner cable is slidably inserted into an outer tube to transmit an operating force, and more particularly,
The present invention relates to a terminal structure in which the sealing portion of the terminal of the outer tube is improved.

[0002]

2. Description of the Related Art An example of a conventional control cable terminal structure will be described with reference to FIG. 1 showing an embodiment of the present invention. Reference numeral 1 is a control cable, which has a structure in which an inner cable 5 is slidably inserted into a flexible outer tube 2 in which a resin jacket 4 is coated on the outer circumference of a steel wire 3 spirally wound in a tubular shape. ing.

At the end of the outer tube 2, a tubular metal cap 7 for fixing the end of the outer tube 2 to the vehicle body is fixed. On the peripheral surface of the metal cap 7, there are formed a plurality of locking pieces 8 which are gradually opened toward the rear side by punching the peripheral surface at circumferentially spaced intervals. An abutting portion 9 is also formed by punching at a portion of the rear end of the portion 7 corresponding to the portion where the locking piece 8 is formed.

In addition, a rubber seal member x, which has an annular shape through which the inner cable 5 can be inserted and has a flange-shaped contact portion formed at the rear end, is provided inside the metal cap 7 inside the metal container 11. The stopper 12 having a center hole formed in front of the metal cap 7 is fitted to the front end of the metal cap 7 and is bent inward to prevent the metal cap 7 from coming off.

The metal cap 7 is externally fitted to the end of the outer tube 2 from the opening side of the rear end, and the contact portion of the seal member x is pressed against the end surface of the outer tube 2, and the outer periphery of the rear end of the metal cap 7 is kept. While being fixed by caulking, a washer 14 is fitted between the protruding end of the locking piece 8 of the metal cap 7 and the abutting portion 9 while elastically contracting the locking piece 8.

The metal cap 7 is shown in FIG.
As shown by the arrow in (A), the mounting plate 1 protruding from the vehicle body
When the locking piece 8 is pushed into the mounting hole 17 of 6 while elastically contracting from the tip side and the locking piece 8 passes through the mounting hole 17 and is restored and expanded, as shown in FIG. The metal cap 7, that is, the end of the outer tube 2 is attached to the attachment plate 16 of the vehicle body by sandwiching both sides of the rim of the attachment hole 17 with the washer 14 and the locking piece 8.

[0007]

By the way, the outer tube 2 is generally formed by cutting a long one into a predetermined length before use.
The cut end face of the is slanted as shown in FIG. 5 (A), or burrs y as shown in FIG. 5 (B).
May have come out.

In this case, even if the metal cap 7 is fitted to the end of the outer tube 2 and the seal member x is pressed against it, it is impossible to make close contact over the entire circumference of the end face and a gap is created, so that the sealing effect cannot be obtained. In particular, as in this example, in the structure in which the locking piece 8 is formed by punching on the outer peripheral surface of the metal cap 7 and the cap 7 is easily infiltrated with water, the sealing of the end of the outer tube 2 is insufficient as described above. In that case, it was remarkable that the outer tube 2 was adversely affected by water infiltration as shown by the arrow.

Needless to say, even if the terminal structure employs another mounting structure, a problem regarding the sealing effect of the terminal of the outer tube 2 will occur similarly.

[0010]

The terminal structure of the control cable of the present invention has been completed in view of the above points, and the entire surface of the elastic seal member is in contact with the end surface of the outer tube. It has a configuration in which a ridge is formed.

[0011]

Even if the end surface of the outer tube is cut obliquely or has burrs and the end surface has irregularities, the protrusion formed on the contact surface of the elastic seal member is The elastic deformation amount is changed corresponding to the unevenness, and the outer tube is pressed closely while conforming to the shape of the end surface of the outer tube.

That is, according to the present invention, there is an effect that the sealing performance of the end of the outer tube can be greatly improved.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. This embodiment is an improvement of the terminal structure described with reference to FIG. 1. As shown in FIG. 2A, in the rubber seal member 21, the outer tube 2 of the seal member 21 is made of rubber.
A ridge 24 having a triangular cross section is formed over the entire circumference at a position slightly outside the rim of the center hole 23 in the contact surface 22 with the end surface of the. Other structures are the same as described above.

Therefore, as shown in FIG. 1B, when the end of the outer tube 2 is obliquely cut, when the metal cap 7 is fitted and the seal member 21 is pressed against the end surface of the outer tube 2, The protrusion 24 of the seal member 21
Is elastically deformed to a greater extent in a portion corresponding to the projecting portion of the end surface of the outer tube 2, and is closely attached over the entire circumference of the end surface of the outer tube 2 without any gap. As a result, a reliable sealing effect is obtained.

Even when a burr is projected from the end surface of the outer tube 2, the portion of the ridge 24 corresponding to the burr is largely elastically deformed and closely adhered over the entire circumference without any gap.

Regarding the position where the ridge is formed on the contact surface of the seal member, depending on the conditions such as the wall thickness of the end surface of the outer tube 2, for example, the seal member 21 shown in FIG.
The protrusion 24a may be formed over the entire width from the rim of the central hole 23 to the outer peripheral edge, as shown in FIG.
Like the seal member 21b of FIG. 3, the protrusion 24b may be formed only around the edge of the center hole 23.

Further, according to the present invention, even if the mounting structure for a fixing member such as a vehicle body is different from the above embodiment, a cap attached to the fixing member is fixed to the end of the outer tube and the end surface of the outer tube is inserted therein. The present invention can be widely applied to all terminal structures in which a ring-shaped elastic seal member that is pressed against is fitted.

[Brief description of drawings]

FIG. 1 shows an overall structure of one embodiment of the present invention, (A) is a cross-sectional view of a state before attachment of a metal cap to an attachment plate,
(B) is a cross-sectional view of the state after attachment.

2A is a cross-sectional view of a seal member according to an embodiment of the present invention, and FIG. 2B is a cross-sectional view illustrating the operation thereof.

FIG. 3 is a sectional view of a seal member according to another embodiment of the present invention.

FIG. 4 is a sectional view of a seal member according to still another embodiment of the present invention.

FIG. 5 is an operation explanatory view of a conventional example.

[Explanation of symbols]

1: Control cable 2: Outer tube 5:
Inner cable 7: Metal cap 8: Locking piece 1
6: Mounting plate (fixing member) 21, 21a, 21b: Seal member 22: Contact surface 24, 24a, 24b: Protrusion

Claims (1)

[Claims] 1. A tubular cap in which a ring-shaped elastic seal member that is pressed against the end surface of the outer tube is fitted inside the end of the outer tube of a control cable in which an inner cable is slidably inserted in the outer tube. In the terminal structure of the control cable in which the cap is fixed and the cap is attached to the fixing member, a ridge is formed on the entire contact surface of the elastic seal member with the end surface of the outer tube. Control cable terminal structure.