JP2001155837A - Plug cap device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a plug cap device that can firmly carry out an inserting of supporting pin into the supporting hole and enhance a mounting work. SOLUTION: The plug cap device includes a sleeve body 22, and one end of the sleeve body is removably connected to an ignition plug. A supporting pin 16 provided in an engine is inserted into a supporting hole 25 formed at an extending portion 24a of a supporting cap body 24 mounted on other end of the sleeve body. An inserting guide flange body 26 extends to one end from the extending portion 24a of the cap body 24, in outer periphery of the cap body 24. The inserting guide flange body 26 has an inserting guide flange portion 26a contacted slidably to a pin supporting wall 15a for guiding in the state matched with an axial center of the supporting hole 25 and the supporting pin 16, and an inserting restriction flange portion 26b extended from the inserting guide flange portion 26a, to the opposed side longer outward than the inserting guide flange portion 26a.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plug cap device used for connection to a spark plug mounted on an internal combustion engine of an automobile or the like.

[0002]

2. Description of the Related Art For example, as this kind of plug cap device, there is one having a structure as shown in FIG. 5, and a plug cap device 1 comprises an elongated tubular sleeve 2 and one end of the sleeve 2. A rubber bush 3 attached thereto, and a rain cover 4 attached to the other end of the sleeve body 2;
An ignition cable 10 is connected via a terminal fitting 9 to a spark plug 8 inserted into a plug hole 7 formed in a cylinder head 6 of the engine and mounted on the engine side. 7 was closed.

[0003] Further, in such an engine structure without the plug hole 7, a short cap type plug cap device having no sleeve body 2 is directly and detachably connected to the ignition plug 8. Was.

Further, engine structures of various shapes have appeared due to recent complicated engine structures and the like, and as shown in FIGS.
However, there is a case where the mounting position of the ignition plug 8 is in a recessed position and the structure is difficult to reach due to the presence of the intake pipe 11 and the exhaust pipe. Was adopted.

At the other end of the sleeve body 2 in the plug cap device 12, a support cap body 13 is provided in place of the rain cover 4, and an overhang portion formed on one side of the support cap body 13 is formed. A support hole 14 having an axis parallel to the axis of the sleeve body 2 is formed in 13a.

When the plug cap device 12 is connected to the spark plug 8 and mounted, for example, a support pin 16 protruding from a head cover 15 of the engine is inserted into a support hole 14 so that the plug cap device 12 is inserted. It was configured to support the other end of the.

[0007]

However, the conventional plug cap device 12 has a structure in which an overhang 13a is formed on one side of the support cap 13 as shown in FIG. When the plug cap device 12 is connected to the spark plug 8 and mounted in a state where the overhang portion 13a is erroneously positioned on the opposite side of the support pin 16 as shown by the phantom line, Although one end of the plug 12 is connected and supported by the ignition plug 8, the other end of the plug cap device 12 is not supported at all,
The plug cap device 12 is likely to shake due to the vibration of the engine, and the connection portion on the side of the spark plug 8 is worn by the influence of the shake, and there is a possibility that the plug cap device 12 may be accidentally detached.

Further, even when the plug cap device 12 is properly mounted, it is difficult to position the support pins 16 and the support holes 14, and there is a problem that the assembling workability is poor.

In view of the above, an object of the present invention is to provide a plug cap device in which a support pin can be more reliably inserted into a support hole and an assembling workability is improved.

[0010]

A technical means for solving the above-mentioned problem has an elongated tubular sleeve provided at one end of an ignition cable, and one end of the sleeve is provided with an engine. Side is detachably connected to a spark plug mounted on the side, and is parallel to an axis of a sleeve body provided in an overhang formed on a support cap body mounted on the other end of the sleeve body. In a plug cap device in which a support pin projecting from an engine is inserted into a support hole having an axis and is mounted and supported, a support cap body located closer to the one end than the overhang portion of the support cap body An insertion guide flange is formed on the outer peripheral surface of the sleeve, and the insertion guide flange is formed such that when one end of the sleeve is connected to the ignition plug, an axis of the support hole of the protrusion and the support pin is formed. Are inserted in such a manner that the support pins facing the sleeve body are slidably brought into contact with a pin support wall on the engine side, on the same side as the support hole, so as to guide them in a state where they are aligned with each other. The point is that a guide flange portion is provided.

Further, the insertion guide flange body may have a structure in which an insertion regulating flange portion is formed on the side opposite to the support hole so as to protrude outward beyond the insertion guide flange portion.

Further, a projecting end of the support pin is formed to have a gradually smaller diameter in the projecting direction, and a pin insertion guide is formed at an end of the support hole on the insertion side of the support pin, the diameter gradually increasing in the direction of the insertion end. It may be a structure made.

Further, the outer diameter of the support pin may be slightly larger than the inner diameter of the support hole.

Further, the insertion guide flange may have a structure in which a chamfer is formed on the underside of the protruding edge.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment according to the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 4, a plug cap device 21 is provided at one end of an ignition cable 10 as in the prior art. An elongated tubular sleeve body 22 made of insulating resin or the like, a bush body 23 made of an elastic material such as rubber, and a sleeve body 22 attached to one end of the sleeve body 22 so as to cover the terminal fitting 9 provided. And a support cap 24 made of an elastic material such as rubber and attached to the other end of the support cap 24.

An extension 24a is formed on one side of the other end of the support cap 24, as in the prior art, and the extension 24a is parallel to the axis of the sleeve 22. A support hole 25 having an appropriate axis is formed.

The projecting portion 24 of the support cap 24
a, the outer peripheral surface of the support cap body 24 located closer to the one end in the direction of the bush body 23, that is, the support cap body 2
An insertion guide flange body 26 is integrally formed on the outer peripheral surface of the intermediate portion in the axial direction of 4.

When the bush member 23 at one end of the sleeve member 22 is connected to the ignition plug 8, the insertion guide flange member 26 has an axial center of the support hole 25 and the support pin 16 of the overhang portion 24a. An insertion guide flange portion 26a slidably abutting against a pin support wall 15a on the head cover 15 side on which the support pin 16 on the side facing the sleeve body 22 protrudes so as to guide in a matched state. 2
5, the insertion guide flange portion 26a is provided on the same side as the overhang portion 2 as shown in FIG.
A pair is arranged on both sides of 4a in a distributed manner.

On the side of the insertion guide flange 26 opposite to the support hole 25, an insertion guide flange 2 is provided.
Each insertion guide flange 26 is provided with an insertion restricting flange 26b which is formed to protrude outward longer than 6a.
a and the insertion restricting flange portion 26b constitute a substantially triangular insertion guide flange body 26.

As shown in FIG. 4, the protruding end 16a of the support pin 16 is formed in a tapered shape with a gradually decreasing diameter in the protruding direction.
A pin insertion guide 25a whose diameter gradually increases in the direction of the insertion end is formed at the insertion-side end of 6.

Further, a chamfered portion 26 having an appropriate width and inclination is provided on the lower surface side of the protruding end edge of each insertion guide flange portion 26a.
c are respectively formed.

In this embodiment, the support pins 1
The outer diameter of the support pin 6 is slightly larger than the inner diameter of the support hole 25, and the support pin 1 is inserted into the support hole 25 by a pushing operation.
6 are inserted in a press-fit manner.

The present embodiment is configured as described above. When the plug cap device 21 is mounted on the spark plug 8, as shown in FIG. As the 16 side, the bush body 23 side of the plug cap device 21 is fitted to the terminal portion of the ignition plug 8.

At this time, the chamfered portion 26c of each insertion guide flange portion 26a comes into contact with the upper end of the pin support wall 15a to be slid and guided, and the outer end surface of each insertion guide flange portion 26a coincides with the pin support wall 15a. The pin support wall 15a and the outer end face of the insertion guide flange 26a are slidable, and the axis of the support pin 16 and the support hole 2 are moved.
A state in which the axes coincide with each other is obtained.

When the plug cap device 21 is pushed in the direction of the spark plug 8 in this state, the spark plug 8 is moved under relative sliding between the respective insertion guide flanges 26a and the pin support wall 15a as shown in FIG. To the terminal fitting 9, and the support pin 16 is inserted into the support hole 25 in a press-fit manner.

Here, a mounted state is obtained in which one end of the plug cap device 21 is mounted and supported on the spark plug 8 and the other end is mounted on the head cover 15 side.

As described above, when the plug cap device 21 is mounted on the spark plug 8, if the extension portion 24a is sequentially pushed into the support pin 16 side, the relative position between the insertion guide flange portion 26a and the pin support wall 15a can be improved. Under the guidance of sliding, the axis of the support pin 16 and the support hole 2 are automatically
Since the shaft 5 is inserted while being aligned with the axis 5, there is no need to perform positioning, the assembling work can be performed easily, and the assembling workability can be improved.

At this time, the projecting end 16a of the support pin 16
Is formed in a tapered shape with a gradually decreasing diameter in the protruding direction,
The insertion side end of the support pin 16 in the corresponding support hole 25 is a pin insertion guide 25 whose diameter gradually increases in the direction of the insertion end.
a, the support pin 16 is provided in the support hole 25.
In the initial stage of the insertion, the insertion guide is smoothly performed, and the assembling workability can be improved from this point as well.

Further, since the chamfered portions 26c are formed on the lower surface side of the protruding edge portion of each insertion guide flange portion 26a, the upper surface side at the upper end portion of the pin support wall 15a and the lower surface side of the insertion guide flange portion 26a are formed. The hooking can be effectively prevented, the insertion guide flange portion 26a can be smoothly guided at a predetermined position, and the assembling workability can be improved from this point as well.

Further, the outer diameter of the support pin 16 is
Is formed slightly larger than the inner diameter of the support hole 25, and the support pins 16 are inserted into the support holes 25 in a press-fit manner. Is more stable.

Further, since the insertion guide flanges 26a are arranged in a pair in a distributed manner, the axis of the support pin 16 and the axis of the support hole 25 can be more stably aligned.

Further, since the insertion restricting flange 26b is formed on the side opposite to the protrusion 24a, the plug restricting flange 26b is erroneously set to the support pin 16 side. When the device 21 is to be mounted, the lower surface of the insertion restricting flange portion 26b abuts against the upper surface of the head cover 15 at the upper end of the pin support wall 15a, and further pushing insertion is prevented. There is an advantage that the mounting of the support pin 16 in the support hole 25 can be performed more reliably because the mounting of the support pin 16 in the support hole 25 can be effectively prevented.

In the above embodiment, the support pins 1
6 shows a structure directly protruding from the head cover 15, but a structure in which a pin support is separately attached and the support pins 16 are protruded from the pin support may be used.

Further, the structure in which the insertion regulating flange 26b is provided only on the opposite side of the insertion guide flange 26a is shown, but the insertion regulating flange 26b is formed to protrude on three sides other than the insertion guide flange 26a. It may be a structure.

Further, in the present embodiment, the structure in which the long plug cap device 21 is required due to the presence of the intake pipe 11 and the like is shown, but the invention is not limited to this type of engine.

[0036]

As described above, according to the plug cap device of the present invention, the insertion guide flange is formed so as to protrude from the outer peripheral surface of the support cap located closer to one end than the protrusion of the support cap. When the one end of the sleeve body is connected to the spark plug, the insertion guide flange body is provided on the same side as the support hole so as to guide the support hole of the overhang portion and the support pin in a state where the axes thereof are aligned with each other. An insertion guide flange portion slidably in contact with a pin support wall on the engine side on which a support pin on the side facing the sleeve body protrudes, the insertion guide flange portion and the pin support wall being provided. Under the guidance of relative sliding, the axis of the support pin and the axis of the support hole are automatically aligned and inserted, so there is no need to perform positioning and assembly work can be performed easily. Workability can be improved There is a point.

Further, if the insertion guide flange body has a structure in which the insertion restriction flange portion is formed on the opposite side to the support hole and is formed so as to protrude outward beyond the insertion guide flange portion, the insertion restriction flange portion is provided. There is an advantage that the mounting of the plug cap device in the wrong direction can be effectively prevented, and the support pin can be more reliably inserted into the support hole.

Further, the protruding end of the support pin is formed to have a gradually smaller diameter in the protruding direction, and a pin insertion guide is formed at the end of the support hole on the insertion side of the support pin, the diameter gradually increasing in the direction of the insertion end. With such a structure, there is an advantage that the guide for inserting the support pin into the support hole can be smoothly performed, and from this point, the assembling workability can be improved.

Further, if the outer diameter of the support pin is formed slightly larger than the inner diameter of the support hole, careless detachment can be effectively prevented, and the mounted and supported mounting state becomes more stable. There are advantages.

Further, if the insertion guide flange portion is formed with a chamfered portion on the lower surface side of the protruding end edge portion, the insertion guide flange portion can be smoothly guided at a predetermined position,
From this point, there is an advantage that the assembling workability can be improved.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an embodiment according to the present invention.

FIG. 2 is an explanatory diagram of the assembly.

FIG. 3 is a view taken along line III-III in FIG. 1;

FIG. 4 is an enlarged sectional view of a main part in FIG.

FIG. 5 is a sectional view of a main part showing a conventional example.

FIG. 6 is a sectional view of a main part showing a conventional example.

FIG. 7 is an explanatory view of the assembly.

FIG. 8 is a view taken along line VIII-VIII of FIG. 1;

[Explanation of symbols]

 Reference Signs List 6 Cylinder head 8 Ignition plug 9 Terminal fitting 10 Ignition cable 15 Head cover 15a Pin support wall 16 Support pin 16a Projecting end 21 Plug cap device 22 Sleeve body 23 Bush body 24 Support cap body 24a Overhang 25 Support hole 25a Pin insertion guide 26 Insertion Guide Flange 26a Insertion Guide Flange 26b Insertion Restriction Flange 26c Chamfer

Claims (5)

[Claims] An ignition cable is provided at one end of the ignition cable and has an elongated tubular sleeve body. One end of the sleeve body is detachably connected to an ignition plug mounted on an engine side, A support pin protruding from the engine side to a support hole having an axis parallel to the axis of a sleeve provided in an overhang formed on an overhang formed on a support cap attached to the other end of the body. Wherein the insertion guide flange is formed so as to protrude from an outer peripheral surface of the support cap located closer to the one end than the protruding portion of the support cap. When one end of the sleeve body is connected to the spark plug, the flange body is provided on the same side as the support hole so as to guide the support hole of the overhang portion and the support pin so that the axes thereof are aligned with each other. , Plug cap apparatus characterized by comprising insertion guide flange is slidably contact is provided on the support pin projecting from the engine side of the pin support walls on the side facing the sleeve body. 2. The insertion guide flange body is provided with an insertion restricting flange portion that is formed on the opposite side to the support hole and protrudes outward longer than the insertion guide flange portion. 2. The plug cap device according to 1. 3. A protruding end of the support pin is formed with a gradually decreasing diameter in a protruding direction, and a pin insertion guide is formed on an end of the support hole on the insertion side of the support pin, the diameter gradually increasing in the direction of the insertion end. 3. The method according to claim 1, wherein
The plug cap device as described. 4. The plug cap device according to claim 1, wherein an outer diameter of the support pin is formed slightly larger than an inner diameter of the support hole. 5. The plug cap device according to claim 1, wherein a chamfered portion is formed on a lower surface side of the protruding edge of the insertion guide flange portion.