JPH08236247A - Method for inserting / withdrawing waterproof plug of waterproof connector and waterproof plug and jig used in the method - Google Patents

Abstract

(57) Abstract: [PROBLEMS] To provide a waterproof plug insertion / withdrawal method for a waterproof connector capable of surely inserting a waterproof plug at a predetermined position, and a waterproof plug and a jig used for the method. SOLUTION: The waterproof plug 11 is held by a tip portion of an insertion jig 21, and the tip portion 23 of a terminal insertion jig 21 is held together with the waterproof plug 11.
Is inserted into the terminal insertion hole 3, and the step portion 27 provided on the side surface of the tip end portion 23 is brought into contact with the housing 29a, whereby the waterproof plug 11 is positioned at a predetermined depth of the terminal insertion hole 3.
1 is attached to the terminal insertion hole 3. Further, the waterproof plug 11 has a protrusion 17 protruding from the center of the end face of the main body 13. Insertion jig 21
Forms a front end portion 23 that fits into the terminal insertion hole 3, forms a holding hole 25 into which the protrusion 17 is inserted, in the front end portion 23, and the waterproof plug 11 is pushed to a predetermined depth of the terminal insertion hole 3. At the time of contacting the housing 29a with the stepped portion 27,
Formed on the side surface of.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inserting / withdrawing a blind plug (waterproof plug) into / from a terminal insertion hole of a waterproof connector, a waterproof plug used in the method, and for inserting / withdrawing the waterproof plug. Regarding jigs.

[0002]

2. Description of the Related Art In a waterproof connector, in order to prevent water from entering from the outside, a ring-shaped rubber plug is attached to an electric wire which is inserted into the terminal insertion hole, and the rubber plug is closely attached to the terminal insertion hole. Was used to seal between the wire and the terminal insertion hole. However, due to the wiring specifications, the terminal inserted into the terminal insertion hole may be omitted, and the above waterproof structure may not be configured. In such a case, the terminal insertion hole is equipped with a waterproof plug that closes the opening and prevents water from entering. The waterproof plug is made of an elastic material and is formed into a columnar shape or a prismatic shape depending on the sectional shape of the terminal insertion hole. Conventionally, the attachment of the waterproof plug has been generally performed by an operator directly inserting the waterproof plug into the terminal insertion hole with his / her finger.

[0003]

However, in the conventional method of inserting the waterproof plug, the operator pushes the waterproof plug with his / her finger or a simple push rod.
As shown in, the predetermined position (depth) where the waterproof function is exerted
It has been difficult to surely insert the waterproof plug 1 into the terminal insertion hole 3, and the waterproof function may not be sufficiently ensured. In the insertion method as described above, it is also difficult to specify the insertion direction of the waterproof plug. For example, in the prismatic waterproof plug 5 shown in FIG. 29, the waterproof plug 5 is inserted in a state where it is rotated about the insertion axis. Then, a gap s is formed between the inner wall of the terminal insertion hole and
Was formed, and the waterproof function deteriorated. Further, also in the cylindrical waterproof plug 7 shown in FIG. 30, when the waterproof plug 7 is inserted at an insertion angle inclined with respect to the regular insertion shaft 9, similarly, a gap s is formed between the waterproof plug 7 and the inner wall of the terminal insertion hole. There is a problem that the waterproof function is lowered due to the formation. Further, when the position shift occurs under the above-mentioned difficult positioning condition and the worker performs a repair work such as twisting the waterproof plug, a secondary accident such as scratching the sealing surface of the waterproof plug may occur. there were.

FIG. 31 shows the case where the terminal insertion hole 3 in which the waterproof plug 1 is mounted is to be used at a later date, or when the waterproof plug 1 is accidentally inserted into another terminal insertion hole 3. Since the terminal insertion hole 3 is not so large that a finger can be inserted, it becomes extremely difficult to grasp and pull out the waterproof plug 1. In such a case, for example, as shown in FIG. 32, if the waterproof plug 1 is pulled out from the terminal insertion hole 3 using a pointed terminal removal jig 10 or the like, As a result, the seal surface 3a will be scratched and the waterproofness will be significantly reduced.

The present invention has been made in view of the above circumstances, and it is possible to insert a waterproof plug into a predetermined position without fail and to easily pull out the waterproof plug. The purpose of the present invention is to provide a waterproof plug and a jig for improving the reliability of the waterproof function.

[0006]

In order to achieve the above object, a method of inserting a waterproof plug of a waterproof connector according to the present invention is such that a waterproof plug made of an elastic material is held at the tip of an insertion jig, and a terminal is provided together with the waterproof plug. Insert the tip of the insertion jig into the terminal insertion hole and position the waterproof plug at the predetermined depth of the terminal insertion hole by abutting the step provided on the side surface of the tip against the housing. By pulling out the waterproof plug from the insertion hole, the waterproof plug is attached to the terminal insertion hole while leaving it at a predetermined position. The structure of the waterproof plug used in the method for inserting the waterproof plug is a waterproof plug integrally formed of an elastic material, and the main body is formed in the shape of a pillar whose outer periphery is in close contact with the terminal insertion hole, and the main axis is in the direction of the central axis of the main body It is characterized in that a protruding protrusion is provided at the center of the end face of the main body. The jig used in the waterproof plug insertion method has a rod-shaped tip that fits into the terminal insertion hole formed at the base, and a holding hole into which a projection protruding from the end face center of the waterproof plug is inserted. It is characterized in that a step is formed on the side surface of the tip end portion, which is formed in the center of the surface and contacts the housing when the waterproof plug held at the tip end through this holding hole is pushed into the terminal insertion hole to a predetermined depth. It is what

Further, the waterproof plug is a waterproof plug integrally formed of an elastic material, and the main body is formed in the shape of a column whose outer periphery is in close contact with the terminal insertion hole, and a hole is formed at the center of the end face of the main body. The engaging recess may be formed inside the main body, the engaging recess being connected to the hole and having an inner diameter larger than that of the hole. The pull-out jig is a pull-out jig used when pulling out the waterproof plug according to claim 6, wherein the center portions of the pair of handle portions are connected by a rotating shaft, and the base ends of the handle portions are connected to each other. It is preferable that the tip portions of the handle portion can be opened by gripping, and the tip portion of the handle portion is provided with a convex portion that engages with the engaging concave portion. The pull-out method using such a waterproof plug and pull-out jig is such that the tip of the pull-out jig is inserted into the pull-out hole of the waterproof plug mounted in the terminal insertion hole and the base end of the handle of the pull-out jig is grasped. The projection provided at the tip is engaged with the engagement recess, and the withdrawal jig is pulled to engage the projection with the engagement recess, and the waterproof plug is inserted into the terminal insertion hole. It is characterized by being pulled out from. Further, the waterproof plug is made of an elastic material in which the punched hole and the engaging recess are continuously provided at both ends of a reinforcing portion made of a hard material, and which is in close contact with the terminal insertion hole in a state where the punched hole is exposed at both ends. The outer peripheral portion may be externally provided on the outer periphery of the reinforcing portion.

In the waterproof plug insertion method, the waterproof plug is inserted into the terminal insertion hole together with the tip of the insertion jig, and when the waterproof plug reaches the predetermined position of the terminal insertion hole, the stepped portion of the insertion jig is inserted into the housing. When they come into contact with each other, the insertion of the insertion jig becomes impossible. At this point, the insertion jig is pulled out from the terminal insertion hole, so that only the waterproof plug is mounted in the terminal insertion hole while being positioned at a predetermined position. In the waterproof plug, a projection or a recess is formed at the center of the end face, and the projection or the recess is fitted into a holding hole or a holding rod of the insertion jig and can be held by the insertion jig. Further, the protrusion or the recess is exposed after the waterproof plug is attached, and the protrusion or the recess enables the waterproof plug type to be recognized. In the waterproof plug insertion jig, when the tip end holding the waterproof plug is inserted into the terminal insertion hole, the central axis of the insertion jig is positionally regulated on the central axis of the terminal insertion hole, and the waterproof plug moves into the terminal insertion hole. Coincides with the central axis. When the waterproof plug reaches a predetermined depth, the step portion abuts the housing to prevent the waterproof plug from being inserted, and the waterproof plug is positioned at the predetermined depth.

Further, in the waterproof plug having the hole and the engaging recess having a larger inner diameter than the hole at the center of the end face of the main body, the engaging recess facilitates the engagement of the drawing jig, and the concentration of the drawing force is eliminated. The waterproof plug is less likely to break. Further, in the extraction jig, the convex portion that engages with the engaging concave portion is provided, and the tip end portion is opened in the engaging concave portion, so that the engaging with the engaging concave portion can be ensured. In the pulling method using such a waterproof plug and the pulling jig,
The tip of the extraction jig is inserted into the extraction hole of the waterproof plug, and the base end of the handle of the extraction jig is gripped, so that the convex part engages with the engaging recess in a pressed state, and the waterproof plug is securely attached. The waterproof plug can be pulled out while it is held. Furthermore, a waterproof plug with a reinforcing part made of a hard material has a large proof stress when the pull-out jig is engaged with the engaging recess, so that the pull-out can be reliably performed and the waterproof plug is damaged. Disappears.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION Preferred embodiments of a waterproof plug insertion / withdrawal method for a waterproof connector and a waterproof plug and a jig used in the method according to the present invention will be described below with reference to the drawings. FIG. 1 is an explanatory view showing a procedure of a waterproof plug insertion method according to the present invention, and FIG. 2 is a side view of a waterproof plug having a protrusion formed on one surface,
FIG. 3 is a side view of a waterproof plug having protrusions formed on both sides, and FIG. 4 is a perspective view of a square waterproof plug. As shown in FIG. 2, a main body 13 of the waterproof plug 11 is formed in a cylindrical shape, and a plurality of annular lips 15 are provided on the outer periphery of the main body 13. Lip 15
When the waterproof plug 11 is inserted into the terminal insertion hole 3 (see FIG. 1), it elastically deforms and comes into close contact with the inner wall of the terminal insertion hole 3. A rod-shaped projection 17 is provided on the end surface of the main body 13, and the projection 17 is projected with the same central axis as the central axis of the main body 13. Protrusion 17
Is formed to have a length protruding from the terminal insertion hole 3 when the waterproof plug 11 is mounted at a predetermined position of the terminal insertion hole 3. In the present embodiment, the length of the protrusion 17 is half or more of the length L of the main body 13. The waterproof plug 11 is integrally formed of an elastic material such as rubber.

The waterproof plug 11 is, as shown in FIG.
The protrusions 17 may be provided on both end surfaces of the protrusion 3. The waterproof plug 11 having such a configuration has no front-back directionality, which is convenient when, for example, the waterproof plug 11 is held by an automatic device. Also, the waterproof plug 11 is
An outer shape is formed according to the cross-sectional shape of the terminal insertion hole 3. Therefore, when the terminal insertion hole 3 has a quadrangular shape other than a circular shape, the waterproof plug 11 has the main body 13 formed in a quadrangular prism shape as shown in FIG. At this time, it is preferable that the protrusion 17 protruding from the end face corresponds to the outer shape of the main body 13. For example, when the main body 13 has a cylindrical shape, the protrusions 17 also have a cylindrical shape, and when the main body 13 has a square pillar shape, the protrusions 17 also have a square pillar shape. By matching the shapes of the main body 13 and the protrusions 17 in this manner, it becomes possible to identify the type of the waterproof plug 11 mounted in the terminal insertion hole 3 based on the shape of the protrusions 17.

The waterproof plug 11 thus constructed is
It is inserted into the terminal insertion hole 3 by an insertion jig. FIG. 5 is a sectional view of the insertion jig. A rod-shaped tip portion 23 is provided at the tip of the insertion jig 21, and the outer diameter of the tip portion 23 matches the inner diameter of the terminal insertion hole 3. A holding hole 25 is formed in the center of the tip surface of the tip portion 23, and the projection 1 of the waterproof plug 11 is inserted into the holding hole 25.
7 is inserted. The insertion jig 21 has a projection 1 in the holding hole 25.
By inserting 7, the waterproof plug 11 is held at the tip.
A step portion 27 is formed on a side surface of the tip portion 23 (a boundary with the base portion 21a), and when the waterproof plug 11 held at the tip reaches a predetermined depth of the terminal insertion hole 3, the step portion 27 has a waterproof connector. Abut the housing. That is, when the waterproof plug is inserted, the waterproof plug 11 is positioned at a predetermined position by bringing the step portion 27 into contact with the housing.

The procedure for mounting the waterproof plug 11 is as follows.
As shown in FIG. 1A, the holding hole 25 of the insertion jig 21
Then, the projection 17 of the waterproof plug 11 is inserted and the waterproof plug 11 is held at the tip of the insertion jig 21. Then, as shown in FIG. 1 (B), the insertion jig 21 is inserted into the terminal insertion hole 3, and the step 2
The waterproof plug 11 is pushed into the terminal insertion hole 3 until 7 contacts the housing 29a of the waterproof connector 29. On this occasion,
The tip portion 23 of the insertion jig 21 is fitted into the terminal insertion hole 3 without a gap, and the central axis of the insertion jig 21 is positionally regulated on the central axis of the terminal insertion hole 3. As a result, the waterproof plug 11 is inserted so as to coincide with the central axis of the terminal insertion hole 3.

When the waterproof plug 11 reaches the predetermined depth of the terminal insertion hole 3, the step portion 27 of the insertion jig 21 comes into contact with the rear end surface of the housing 29a, so that the insertion jig 21 cannot be inserted. At this point, when the insertion jig 21 is pulled out from the terminal insertion hole 3, the protrusion 17 is detached from the holding hole 25 of the insertion jig 21, and only the waterproof plug 11 has a predetermined position as shown in FIG. It is mounted in the terminal insertion hole 3 in the state left behind. As described above, the mounting of the waterproof plug 11 is completed.

As shown in FIG. 1C, the projection 17 of the waterproof plug 11 after mounting is projected from the rear portion of the housing 29a. As a result, the type of the waterproof plug 11 attached to the terminal insertion hole 3 can be identified. In the waterproof connector, as shown in FIG. 6, after the rubber plug 31 is mounted in the terminal insertion hole 3, the rear holder 33 may be mounted further behind it. When the waterproof plug 11 is used for such a waterproof connector, the electric wire 35 is inserted from the insertion opening 33a of the rear holder 33.
Similarly to the above, the protrusion 17 can be inserted to ensure the identification function.

As shown in FIG. 7, the waterproof plug 11 can be removed by the projection 1 protruding from the rear part of the housing 29a.
It is carried out by grasping and pulling 7. At this time, since it is not necessary to twist the main body 13 of the waterproof plug 11 as in the conventional case, the sealing surface (lip 15) is not scratched and the waterproof plug 11 can be reused after the removal.

According to the above-described embodiment, the insertion jig 21 capable of holding the waterproof plug 11 is used, and the step portion 2 is provided on the insertion jig 21.
Since 7 is provided, the waterproof plug 11 can be reliably mounted at a predetermined position (depth). Then, the central axis of the insertion jig 21 is regulated on the central axis of the terminal insertion hole 3, so that the waterproof plug 11 can be surely inserted in alignment with the central axis of the terminal insertion hole 3. In addition, the protrusion 17 is attached to the housing 29.
Since it projects from a, the waterproof plug 11 can be easily identified. Furthermore, at the time of insertion, position correction, and removal,
Since the main body 13 is not scratched, waterproof reliability is not reduced.

In the above embodiment, the protrusion 17
By making the shape of the same as the shape of the main body 13, the waterproof plug 1
Although the type 1 is identified, if the identification range extends to other areas (for example, the outer diameter of the main body 13, the overall length of the main body 13, the material, etc.), the tip of the protrusion 17 should be color-coded. The identification function can be further expanded by.

Next, another embodiment of the present invention will be described. 8 is an explanatory view showing a procedure of a waterproof plug inserting method according to another embodiment of the present invention, FIG. 9 is a side view of a waterproof plug having a recess formed on one side, and FIG. 10 is a waterproof plug having a recess formed on both sides. A side view and FIG. 11 are perspective views of a rectangular waterproof plug. As shown in FIG. 9, the waterproof plug 41 according to the present embodiment has a main body 1
A plurality of lips 15 similar to the waterproof plug 11 are provided on the outer periphery of 3. On the other hand, a cylindrical space-shaped recess 43 is formed in the center of the end surface of the main body 13, and the recess 43 is arranged with the same central axis as the central axis of the main body 13.

As shown in FIG. 10, the waterproof plug 41 may have recesses 43 formed on both end surfaces of the main body 13, respectively. The waterproof plug 41 has an outer shape according to the cross-sectional shape of the terminal insertion hole 3. Therefore, when the terminal insertion hole 3 has a quadrangular shape other than a circular shape, the waterproof plug 41 has the main body 13 formed in a quadrangular prism shape as shown in FIG. At this time, the recess 43 preferably corresponds to the outer shape of the main body 13. That is, when the main body 13 has a cylindrical shape, the concave portion 43 also has a cylindrical space shape, and when the main body 13 has a square pillar shape, the concave portion 43 also has a square pillar space shape. Thus the main body 1
By matching the shapes of 3 and the recess 43, it is possible to identify the type of the waterproof plug 41 inserted in the terminal insertion hole 3 (see FIG. 8) based on the shape of the recess 41.

The waterproof plug 41 thus constructed is
It is inserted into the terminal insertion hole 3 by an insertion jig. FIG. 12 is a sectional view of the insertion jig. A rod-shaped tip portion 23 is projected from the tip of the insertion jig 45, and the outer diameter of the tip portion 23 matches the inner diameter of the terminal insertion hole 3. A holding rod 49 is projectingly provided at the center of the tip surface of the tip portion 23, and the holding rod 49 is a recess 4 of the waterproof plug 41.
Inserted in 3. The insertion jig 45 has a holding rod 49 and a recess 4
By inserting 3, the waterproof plug 41 is held at the tip. A step portion 27 is formed on the side surface of the tip portion 23 (a boundary with the base portion 45a), and when the waterproof plug 41 held at the tip reaches a predetermined depth of the terminal insertion hole 3, the step portion 27 has a waterproof connector. Abut the housing. That is, when the waterproof plug is inserted, the waterproof plug 41 is positioned at a predetermined position by bringing the step portion 27 into contact with the housing.

The procedure for mounting the waterproof plug 41 is as follows.
As shown in FIG. 8A, the holding rod 49 of the insertion jig 45 is
Then, the recess 43 of the waterproof plug 41 is inserted, and the waterproof plug 41 is held at the tip of the insertion jig 45. Next, as shown in FIG. 8 (B), the insertion jig 45 is inserted into the terminal insertion hole 3, and the step 2
The waterproof plug 41 is pushed into the terminal insertion hole 3 until 7 contacts the housing 29a of the waterproof connector 29. On this occasion,
The tip end portion 23 of the insertion jig 45 is fitted into the terminal insertion hole 3 without a gap, and the central axis of the insertion jig 45 is regulated on the central axis of the terminal insertion hole 3. Thereby, the waterproof plug 41 is inserted so as to coincide with the central axis of the terminal insertion hole 3.

When the waterproof plug 41 is inserted to the predetermined depth of the terminal insertion hole 3, the step portion 27 of the insertion jig 45 moves into the housing 2.
9a and the insertion jig 45 cannot be inserted. At this point, if the insertion jig 45 is pulled out from the terminal insertion hole 3,
The recess 43 is removed from the holding rod 49 of the insertion jig 45.
As shown in (C), only the waterproof plug 41 is attached to the terminal insertion hole 3 with the waterproof plug 41 left at a predetermined position. From the above,
The mounting of the waterproof plug 41 is completed.

As shown in FIG. 8C, the waterproof plug 41 after mounting has the recess 43 exposed at the rear part of the housing 29a. As a result, the type of the waterproof plug 41 attached to the terminal insertion hole 3 can be identified. To remove the waterproof plug 41, as shown in FIG. 13, a pull-out jig 53 having a hook-shaped hooking claw formed at its tip is inserted from the rear part of the housing 29a, and the inside of the recess 43 is hooked. This is done by pulling out. At this time, the main body 13 of the waterproof plug 41 as in the conventional case
Since it is not necessary to pry, the sealing surface 3a (see FIG. 32) and the lip 15 are not scratched, and the waterproof plug 41 can be reused even after the removal.

According to this embodiment, the insertion jig 45 capable of holding the waterproof plug 41 is used, and the step 27 is formed on the insertion jig 45.
Since the above is provided, the waterproof plug 41 can be reliably mounted at a predetermined position (depth). Further, since the central axis of the insertion jig 45 is regulated on the central axis of the terminal insertion hole 3, the waterproof plug 41 can be surely inserted into the central axis of the terminal insertion hole 3 and inserted. In addition, the concave portion 43 has the housing 29a.
Since the rear end face is exposed, the waterproof plug 41 can be easily identified. Further, since the main body 13 is not scratched at the time of insertion, position correction and removal, the waterproof reliability is not deteriorated.

The above description has been mainly about the method of inserting the waterproof plug and the waterproof plug and the jig used in the method. Next, the method of pulling out the waterproof plug and the waterproof plug and the jig used in the method will be described. Will be explained. 14 is a cross-sectional view of a waterproof plug having a structure particularly suitable for pulling out, FIG. 15 is a side view of a pulling jig used for the waterproof plug of FIG. 14, and FIG. 16 is waterproof with the waterproof plug of FIG. FIG. 17 is a sectional view of the connector, and FIG. 17 is an explanatory diagram showing a method for pulling out the waterproof plug shown in FIG. The waterproof plug 51 has an outer shape substantially similar to that of the waterproof plug 11 described above, and has an annular lip 1 on the outer periphery of the main body 13.
5 are provided in multiple stages. When the waterproof plug 51 is inserted into the terminal insertion hole 3 (see FIG. 1), the lip 15 elastically deforms and comes into close contact with the inner wall of the terminal insertion hole 3. A hole 55 for inserting a drawing jig is formed in the end surface of the main body 13, and the hole 55 is continuously provided with an engagement recess 57 having an enlarged diameter inside. Therefore,
The edge portion of the punched hole 55 becomes a collar portion 59 that projects toward the center of the punched hole 55.

On the other hand, as shown in FIG. 15, the pull-out jig 61 has a pair of handle portions 63 whose central portions are connected by a rotating shaft 65, and a base portion of the handle portion 63 serves as a grip portion 67. The pull-out jig 61 is such that the grip portions 67 are gripped and moved in the approaching direction, whereby the tip ends of the handle portions 63 open in the separating direction. A protrusion 69 protruding in the opening direction is formed at the tip of the handle 63, and the outer diameter D of the protrusion 69 is smaller than the inner diameter d of the hole 55 when the handle 63 is closed. Further, a spring 71 is provided between the gripping portions 67 of the extraction jig 61, and the spring 71 biases the gripping portions 67 in the separating direction. Therefore, the pull-out jig 61 is normally in a state in which the front end side is closed.

A method of pulling out the waterproof plug 51 using such a pulling jig 61 will be described. By mounting the waterproof plug 51 at a predetermined depth of the terminal insertion hole 3, as shown in FIG.
Is exposed. The operator holds the extraction jig 61, and in this state, attaches the tip of the extraction jig 61 to the waterproof plug 5.
1 into the hole 55. When the extraction jig 61 is gripped with the tip inserted into the extraction hole 55, the tip of the extraction jig 61 opens in the waterproof plug 51, and the protrusion 69 of the tip is removed, as shown in FIG. Engagement recess 57 of waterproof plug 51
Will be engaged.

In this state, the operator pulls out the extraction jig 61.
While grasping, pull out the waterproof plug 51. The waterproof plug 51 can be easily pulled out from the terminal insertion hole 3 in a state where the convex portion 69 of the pull-out jig 61 is engaged with the engaging concave portion 57. The pull-out jig 61 has a conceptual shape, as shown in FIG.
6 and 17, the waterproof plug 51 is drawn to have a size almost equal to that of the waterproof plug 51, but in reality, the waterproof plug 51 is larger than the waterproof plug 51 to facilitate operation (see FIGS.
Also in).

The waterproof plug 51 and the pull-out jig 61 as described above.
According to the method for pulling out the waterproof plug using, the convex portion 69 of the pulling jig 61 opens in the engaging concave portion 57 of the waterproof plug 51,
Since the convex portion 69 is securely engaged with the engaging concave portion 57, the waterproof plug 51 can be securely held and pulled out from the terminal insertion hole 3. Further, since the pull-out jig 61 is inserted into the engaging concave portion 57 formed on the central axis of the waterproof plug 51, it does not come into contact with the seal surface 3a of the terminal insertion hole 3 and the seal surface 3a is not scratched. There is no risk of deterioration of the sealing property. Further, since the waterproof plug 51 is provided with the engaging concave portion 57 and the convex portion 69 which engages with the flange portion 59 of the engaging concave portion 57 is formed in the pull-out jig 61, the flange portion 59 and the convex portion 69 are fitted to each other. It can be locked in the state, and it is possible to prevent the waterproof plug 51 from being scratched and the brim portion 59 from being damaged when a pointed jig or the like is used. As a result, the waterproof plug 51 after being pulled out
Can be reused.

The waterproof plug to be pulled out by using such a pulling jig 61 preferably has the following structure. 18 is a sectional view of a waterproof plug having a reinforcing portion, FIG. 19 is a sectional view of a waterproof connector equipped with the waterproof plug of FIG. 18, FIG. 20 is an explanatory view showing a method of pulling out the waterproof plug of FIG. 18, and FIG. It is sectional drawing which shows the modification of 18 waterproof plugs. As shown in FIG. 18, the waterproof plug 81 is made of an elastic material,
For example, an outer peripheral portion 83 made of rubber and a reinforcing portion 85 made of a hard material, for example, a resin material provided inside the outer peripheral portion 83 are integrally formed. The outer peripheral portion 83 has the waterproof plug 5 described above.
As in the case of No. 1, a plurality of annular lips 15 are provided on the outer circumference.

Reinforcing portions 85 are exposed on both end surfaces of the waterproof plug 81, and the above-mentioned hole 55 and engaging recess 57 are formed on both end surfaces of the exposed reinforcing portion 85, respectively. In the reinforcing portion 85, for example, a small diameter portion 87 is formed in the central portion, so that in the integrated structure with the outer peripheral portion 83, the adhesion with the outer peripheral portion 83 is enhanced.

In such a waterproof plug 81, the pull-out jig 61 shown in FIG. 15 is used in the same manner as the above-mentioned waterproof plug 51 to pull out from the terminal insertion hole 3. That is, the worker holds the extraction jig 61, and in this state, inserts the tip of the extraction jig 61 into the extraction hole 55 of the waterproof plug 81 as shown in FIG. When the extraction jig 61 is gripped with the tip inserted in the extraction hole 55, as shown in FIG. 20, the tip of the extraction jig 61 opens in the waterproof plug 81, and the protrusion 69 of the tip is removed. It will engage with the engagement recess 57 of the waterproof plug 81. In this state, the worker
While holding the pull-out jig 61, the waterproof plug 81 is pulled out.
The waterproof plug 81 can be easily pulled out from the terminal insertion hole 3 in a state where the projection 69 of the extraction jig 61 is engaged with the engagement recess 57.

According to this waterproof plug 81, since the vent hole 55 and the engaging recess 57 are formed by the hard reinforcing portion 85 made of a resin material or the like, the collar portion 59a (see FIG. 18) around the vent hole 55 is formed. It will have high strength. Therefore, an excessive pulling force is exerted on the collar 59a via the pulling jig 61.
Even if it is added, the engaging recess 57, that is, the flange 59a does not break like a rubber material, and the waterproof plug 81 can be reliably pulled out. As a result, it becomes unnecessary to adjust the pulling force when the pulling jig 61 is used, and the pulling out can be further facilitated without worrying about damage to the collar portion 59a.

Further, in the waterproof plug 81, the reinforcing portion 85 has an integral structure, but as shown in FIG. 21, the waterproof plug 91 is a separate member in which the reinforcing portions 85a and 85b are divided into two. May be According to such a waterproof plug 91, the reinforcing portions 85a, 8a in which the hole 55 and the engaging recess 57 are formed.
The rubber material portion 93 is interposed between the 5b, and for example, even when the waterproof plug 91 is inserted at an inclination to the central axis of the terminal insertion hole 3, the rubber material portion 93 absorbs the deviation due to the inclination ( It can be deformed in the shearing direction) and the deterioration of the waterproof function can be prevented.

Next, a modified example of the waterproof plug 11 having improved withdrawal property will be described. 22 is a perspective view of a waterproof plug having a knob portion, FIG. 23 is an explanatory view showing a pulled-out state of the waterproof plug of FIG. 22, and FIG. 24 is a method of pulling out the waterproof plug shown in FIG. 22 mounted in a deep portion of a terminal insertion hole. FIG. 25 is an enlarged view of a main part of FIG. 24, FIG. 26 is an enlarged view of a main part of a modification of the waterproof plug of FIG. 22, and FIG. 27 is a view of another modification of the waterproof plug of FIG. FIG. The above waterproof plug 11
In the above, the rod-shaped projections 17 are provided so as to project from both end surfaces of the main body 13, but in the waterproof plug, the rod-shaped projections 17 may be bulged projections (knobs) 101 in order to ensure the withdrawal property. . That is, in the grip portion 101, the tip portion 105 has a larger diameter portion than the continuous portion 103 with the main body 13 and has a shape capable of preventing the grip portion 101 from coming off from the finger when gripped by the finger.

In the waterproof plug 107 thus formed,
When inserted into the deep portion of the terminal insertion hole 3, a normal tweezers-shaped extraction jig 109 whose tip side is bent inward is inserted into the terminal insertion hole 3 without using a special extraction jig, and as shown in FIG. As shown in FIG. 25, it is possible to pull out by sandwiching the knob 101.

The shape of the knob 101 is shown in FIG.
2 and the flange portion 111 shown in FIG.
May be formed at the tip. If the knob 101 has such a shape, slipping by the extraction jig 109 is eliminated, and extraction can be performed more reliably.

Further, as shown in FIG. 27, the knob portion 101 may be one in which a plurality of hump-shaped bulging portions 113 are arranged side by side in the longitudinal direction of the protrusion on the outer periphery of the rod-shaped protrusion. Picking part 1
If 01 has such a shape, the first bulge 113
Even if a slip occurs in the gripping, the gripping can be gripped by the second and third bulging portions 113, which also makes it possible to more reliably pull out.

[0040]

As described above in detail, according to the method of inserting the waterproof plug of the waterproof connector of the present invention, the waterproof plug is held by the insertion jig and the step portion of the insertion jig is brought into contact with the housing. Since the waterproof plug is positioned by doing so, the waterproof plug can be reliably inserted into the predetermined position, and the reliability of the waterproof function can be improved. According to the waterproof plug, since the protrusion or the recess is formed at the center of the end face of the main body, the protrusion or the recess can be fitted in the holding hole or the holding rod of the insertion jig to be held by the insertion jig. Further, since the protrusion or the recess is exposed after mounting the waterproof plug, the type of the waterproof plug can be recognized by the protrusion or the recess. According to the waterproof plug insertion jig, since the tip part that fits into the terminal insertion hole is formed, the waterproof plug can be aligned with the central axis of the terminal insertion hole by inserting the tip part into the terminal insertion hole. . Further, since the step portion is formed at the tip portion, when the waterproof plug reaches a predetermined depth, the insertion of the insertion jig is blocked, and the waterproof plug can be positioned. Further, according to the waterproof plug for pulling out, since the pulling hole and the engaging concave portion are formed in the main body and the pulling jig is engaged with the engaging concave portion, the pulling out can be easily performed and the pulling force can be increased. You will not concentrate and the waterproof plug will not break easily. Further, since the pull-out jig is provided with the convex portion that engages with the engaging concave portion, the engagement with the waterproof plug can be ensured. Further, according to the pulling method using such a waterproof plug and the pulling jig, the convex portion is pressed against the engaging concave portion by grasping the base end of the handle portion of the pulling jig. Can be pulled out. Further, with the waterproof plug having the reinforcing portion made of a hard material provided therein, it is possible to increase the proof stress when the pull-out jig is engaged with the engaging concave portion, and it is possible to reliably perform the pull-out. Moreover, it is possible to prevent damage to the waterproof plug.

[Brief description of drawings]

FIG. 1 is an explanatory view showing a procedure of a waterproof plug insertion method according to the present invention.

FIG. 2 is a side view of a waterproof plug having a protrusion formed on one surface.

FIG. 3 is a side view of a waterproof plug having protrusions formed on both sides.

FIG. 4 is a perspective view of a square waterproof plug.

FIG. 5 is a sectional view of an insertion jig.

FIG. 6 is an explanatory diagram when a waterproof plug is used together with a rear holder.

FIG. 7 is a diagram illustrating a method for removing a waterproof plug.

FIG. 8 is an explanatory diagram showing a procedure of a waterproof plug inserting method according to another embodiment.

FIG. 9 is a side view of a waterproof plug according to another embodiment in which a recess is formed on one surface.

FIG. 10 is a side view of a waterproof plug according to another embodiment in which recesses are formed on both sides.

FIG. 11 is a perspective view of a rectangular waterproof plug according to another embodiment.

FIG. 12 is a cross-sectional view of an insertion jig according to another embodiment.

FIG. 13 is a diagram illustrating a method for removing a waterproof plug according to another embodiment.

FIG. 14 is a cross-sectional view of a waterproof plug having a structure particularly suitable for pulling out.

FIG. 15 is a side view of the extraction jig used for the waterproof plug of FIG.

16 is a cross-sectional view of a waterproof connector equipped with the waterproof plug of FIG.

FIG. 17 is an explanatory diagram showing a method of pulling out the waterproof plug shown in FIG. 14.

FIG. 18 is a sectional view of a waterproof plug having a reinforcing portion.

19 is a sectional view of a waterproof connector equipped with the waterproof plug of FIG.

FIG. 20 is an explanatory view showing a method for pulling out the waterproof plug of FIG. 18.

21 is a sectional view showing a modified example of the waterproof plug of FIG.

FIG. 22 is a perspective view of a waterproof plug having a knob.

FIG. 23 is an explanatory diagram showing a pulled-out state of the waterproof plug of FIG. 22.

FIG. 24 is an explanatory view showing a method for pulling out the waterproof plug shown in FIG. 22 mounted in the deep part of the terminal insertion hole.

FIG. 25 is an enlarged view of a main part of FIG. 24.

FIG. 26 is an enlarged view of an essential part showing a modified example of the waterproof plug of FIG. 22.

FIG. 27 is an enlarged view of an essential part showing another modification of the waterproof plug of FIG. 22.

FIG. 28 is an explanatory diagram showing a position (depth) deviation state of a conventional waterproof plug.

FIG. 29 is an explanatory diagram showing a shift state of a conventional waterproof plug in a rotation direction.

FIG. 30 is an explanatory view showing an axial deviation state of a conventional waterproof plug.

FIG. 31 is an explanatory diagram showing a conventional waterproof plug withdrawn.

FIG. 32 is an explanatory diagram showing a conventional waterproof plug pulled out by a jig.

[Explanation of symbols]

 3 Terminal insertion hole 11, 41, 51, 81, 91, 107 Waterproof plug 13 Main body 17 Protrusions 21, 45 Insertion jigs 21a, 45a Base portion 23 Tip portion 25 Holding hole 27 Step portion 29a Housing 43 Recess 49 Holding rod 55 Removal hole Reference numeral 57 Engagement concave portion 61 Extraction jig 63 Handle portion 65 Rotating shaft 69 Convex portion 83 Outer peripheral portion 85 Reinforcement portion 101 Picking portion 113 Bump-shaped bulging portion

Claims (11)

[Claims] 1. A waterproof plug made of an elastic material is held by a tip portion of an insertion jig, and the tip portion of a terminal insertion jig is inserted into a terminal insertion hole together with the waterproof plug, and is provided on a side surface of the tip portion. Position the waterproof plug at the specified depth of the terminal insertion hole by abutting the step on the housing, and pull out the insertion jig from the terminal insertion hole to leave the waterproof plug only at the specified position. A method for inserting a waterproof plug into a waterproof connector, characterized in that 2. A waterproof plug integrally formed of an elastic material, wherein a main body is formed in the shape of a column whose outer periphery is in close contact with a terminal insertion hole, and a projection protruding in the central axis direction of the main body is formed on an end surface of the main body. A waterproof plug for a waterproof connector, which is characterized by being installed in the center. 3. A rod-like tip end portion that fits into a terminal insertion hole is formed in the base portion, and a holding hole into which a projection protruding from the end face center of the waterproof plug is inserted is formed in the tip end face center of the tip end portion, Insertion of a waterproof plug, characterized in that a step portion is formed on a side surface of the tip portion, the step portion being in contact with the housing when the waterproof plug held at the tip through the holding hole is pushed to a predetermined depth of the terminal insertion hole. jig. 4. A waterproof plug integrally formed of an elastic material, wherein a main body is formed in the shape of a column whose outer periphery is in close contact with the terminal insertion hole, and a column-shaped recess is formed in the center of the end face of the main body. A waterproof plug of a waterproof connector, which is characterized in that 5. A rod-like tip end portion that fits into a terminal insertion hole is formed at the base portion, and a holding rod inserted into a recess formed at the center of the end face of the waterproof plug is provided at the center of the tip end face of the tip portion. A waterproof plug held at the tip through the holding rod is formed on a side surface of the tip end with a step portion that comes into contact with the housing when the waterproof plug is pushed to a predetermined depth of the terminal insertion hole. Insertion jig. 6. A waterproof plug integrally formed of an elastic material, wherein a main body is formed in the shape of a column whose outer periphery is in close contact with the terminal insertion hole, and a hole is formed at the center of the end face of the main body. A waterproof plug for a waterproof connector, characterized in that an engaging recess having a larger inner diameter than the hole is formed inside the main body. 7. A pull-out jig used when pulling out the waterproof plug according to claim 6, wherein the center portions of the pair of handle portions are connected by a rotating shaft, and the base ends of the handle portions are held together. The pull-out jig is characterized in that the tip ends of the handle portion can be opened, and a convex portion that engages with the engaging recessed portion is provided at the tip end of the handle portion. 8. A method for pulling out the waterproof plug according to claim 6 by using the pull-out jig according to claim 7, wherein a tip of the pull-out jig is inserted into the hole of the waterproof plug attached to the terminal insertion hole. The protrusion provided at the tip is engaged with the engaging recess by gripping the base end of the handle of the extracting jig, and the protrusion is pulled into the engaging recess by pulling the extracting jig. A method of pulling out the waterproof plug, wherein the waterproof plug is pulled out from the terminal insertion hole while being engaged with. 9. An outer periphery made of an elastic material in which the punched hole and the engaging recess are continuously provided at both ends of a reinforcing portion made of a hard material, and the punched hole is exposed at both ends and is in close contact with the terminal insertion hole. 7. The waterproof plug for a waterproof connector according to claim 6, wherein the portion is provided outside the reinforcing portion. 10. The waterproof plug according to claim 2, wherein the protrusion is a picked portion having a bulged tip. 11. A plurality of hump-shaped bulging portions are arranged side by side in the longitudinal direction of the protrusion on the outer periphery of the protrusion.
The described waterproof plug.