JP4342422B2 - Oil level gauge guide mold - Google Patents

Description

The present invention relates to an oil level gauge guide that is connected to an engine block below a cylinder block and accommodates an oil level gauge.

Conventionally, in such an oil level gauge guide, a pipe is bent into an appropriate shape, and a lower end portion is connected to an engine block, an upper end side is fixed, and an oil level gauge is inserted therein.
The lower end connected to the engine block uses an elastic O-ring and a sealing material from the viewpoint of oil leakage prevention and ease of connection, and the lower end of the oil level gauge guide is O
A ring is attached and a sealing material is provided on the upper end side of the O-ring so that the O-ring is brought into close contact with the inner peripheral surface of the mounting hole on the engine block side, and the upper opening is closed with the sealing material.
For example, as in conventional examples 1 and 2 shown in FIGS. 5 and 6, an O-ring c is accommodated in a portion between the first and second enlarged diameter portions b and b ′ provided at two locations on the lower end side of the guide pipe a. The seal material d, which is a vulcanized rubber lump, is integrated into the guide pipe a as in the conventional example 1 shown in FIG. 5, or the center of the disc-shaped seal material e is guided to the guide pipe as in the conventional example 2 shown in FIG. a is penetrated and a stopper f is provided above the sealing material e. Note that the first and second enlarged diameter portions b and b ′ are formed by compressing and buckling the guide pipe a in the longitudinal direction.

We do not conduct prior art searches at the research and development stage or application stage, and do not know the prior art documents to be described.

However, in the former case in the above prior art, the seal pipe d must be formed by pouring rubber after setting the guide pipe a in the mold, and in the latter case, the stopper f is used as a guide. The pipe a has to be integrated by welding or the like, and both of them have problems to be solved such as a complicated manufacturing process.

In view of the problem that the manufacturing process is complicated based on the above-described conventional technology, the present invention forms first and second enlarged diameter portions at two locations at the lower end portion of the guide pipe, and between the first and second enlarged diameter portions. An O-ring is fitted into the upper portion, and a third enlarged portion is formed at the upper end side portion from the second enlarged portion, and a portion between the second and third enlarged portions is passed through the center of the disc-shaped sealing material. By making the upper and lower portions of the groove provided on the outer peripheral surface bendable, it is possible to complete the work by simply fitting an O-ring and a seal material while forming an extra-diameter portion at one place. Solve the above problems.

In short, in the present invention , the second molding die 13 is slidably accommodated in the inner side of the accommodation recess 14 provided in the base 11 and the first molding die 12 is slidably accommodated in the opening side. Further, the pipe insertion portions 15, 15 a, 15 b of the same diameter extending through the base 11 are provided with chucking means for the pipe 1 a, and the second molding die 13 side of the first molding die 12 and the base 11 side of the second molding die 13 are provided. The recesses 16 and 17 are formed in the center of the recesses 16 and 17 so that the insertion portions 15a and 15b are positioned, and the insertion recess 22 is formed in the center of the end surface of the first mold 12 on the second mold 13 side. At the same time, the recess 16 is formed in the center of the bottom surface on the back side of the insertion recess 22, and the distal end portion 23 of the second mold 13 is narrowed through the step portion 24 so as to be slidably inserted into the insertion recess 22. An insertion recess 25 is formed on the end surface of the second mold 13 on the base 11 side, and the recess 17 is formed in the center of the bottom surface on the back side of the insertion recess 25, Since the insertion part 26 to the insertion recess 25 is integrally projected at the center of the bottom surface, even if the first and second molding dies 12, 13 are elongated in the slide direction to ensure a stable slide, the recess 16, Since 17 can be brought close to the tip surfaces of the first and second molds 12 and 13, the narrow guide pipe 1 between the first and second enlarged diameter portions 2 and 3 and between the second and third enlarged diameter portions 3 and 6 is provided. Can be formed.
The guide pipe molded by the molding die, thereby forming a first and second enlarged diameter portion at two positions of the lower end portion of that is fitted an O-ring between said first and second enlarged diameter portion, the A groove that is formed on the outer peripheral surface of the sealing material by forming a third enlarged diameter portion at the upper end side portion from the second enlarged diameter portion, passing the portion between the second and third enlarged diameter portions through the center of the disc-shaped sealing material Since the upper and lower portions are bendable parts, the third enlarged portion, that is, the stopper for the sealing material can be formed in the same way as the second enlarged portion, so the second and third enlarged portions are formed in a series of manufacturing processes. Therefore, the manufacturing process can be simplified.

The second molding die is slidably accommodated in the back side of the housing recess provided in the base, and the first molding die is slidably accommodated in the opening side. In the molding die, the pipe chucking means is provided, the concave portion is formed on the second molding die side of the first molding die and the base side of the second molding die, and the insertion portion is located at the center of the concave portion. After the pipe is inserted through the pipe insertion site and chucked and set, the first and second molds are sequentially slid to the back side of the receiving recess, and the pipe is expanded outward in the recesses in the first and second molds. 2nd bowl-shaped
Since the three enlarged diameter portions are formed, it is possible to chuck and process three portions of the pipe simultaneously by simply inserting the pipe into the pipe insertion portion. Since the second and third enlarged diameter portions can be formed in two places, the dimensional accuracy can be improved, and the working time and the processing cost can be reduced along with the reduction of the working process. The practical effect is great.

Hereinafter, an embodiment of an oil level gauge guide according to the present invention will be described with reference to the drawings.
In the oil level gauge guide according to the present invention, as shown in FIGS. 1 to 3, the lower end of the guide pipe 1 bent into an appropriate shape is a tapered enlarged diameter portion 2, and the intermediate portion of the guide pipe 1 is formed. The enlarged diameter portion 3 is formed by buckling the vicinity of the lower end portion like a bowl, and the portion between the enlarged diameter portions 2 and 3 is used as a fitting groove 5 of the O-ring 4.
An enlarged diameter portion 6 similar to the enlarged diameter portion 3 is formed on the upper end side portion of the enlarged diameter portion 3 in the guide pipe 1, and a disc-like and ring-shaped sealing material 7 is provided between the enlarged diameter portions 3 and 6. The seal member 7 is fitted on the guide pipe 1 and is slidable with respect to the guide pipe 1.
Further, the groove 8 is provided on the outer peripheral surface of the sealing material 7 and the upper and lower portions thereof are made into bendable portions 9 and 9a, and at least the lower bendable portion 9a is swung upward, The attachment hole H is closed by the sealing material 7 by being in close contact with the inner peripheral surface of the attachment hole H. In addition, the upper part of the attachment hole H is made into the upward expansion taper part, and the lower part is made into the reduced diameter part via a step part.

The mold 10 for manufacturing the guide pipe 1 is provided with a first slidable relative to the base 11.
2 having molds 12 and 13, forming a housing recess 14 in the center of one end surface of the base 11, sliding the second mold 13 on the back side of the housing recess 14, and sliding the first mold 12 on the opening side Contained as possible. The first
The pipe insertion parts 15, 15a, 15b of the same diameter penetrating the two molds 12, 13 and the base 11 are formed on the coaxial line. The other end side of the first mold 12, that is, the second mold 13 side, and the other end side of the second mold 13, that is, the base 11 side, are recessed portions 16, 17, and the insertion site in the center of the recessed portions 16, 17. It is formed so that 15a and 15b are located. Further, the opening on one end surface side of the pipe insertion portion 15 in the first mold 12 is expanded in a taper shape to form a locking portion 18 of the first diameter-expanded portion 2. The guide pipe 1 is chucked at the pipe insertion portions 15, 15a, 15b.

.. Are provided between the base 11 and the second mold 13 and a stopper 20 is provided inwardly on the peripheral surface of the receiving recess 14 so that the second mold 13 is formed by the compression springs 19, 19a. The second mold 13 is pressed against the stopper 20 in the contact state, and the base 11 and the second mold 13 are separated from each other.
Further, compression springs 21, 21 a... Are provided between the first mold 12 and the stopper 20.

The first and second molds 12, 13 are easier to secure a stable slide as the length is longer in the slide direction.
Since the space between the first and second enlarged diameter portions 2 and 3 and the second and third enlarged diameter portions 3 and 6 in the guide pipe 1 are narrow, it is necessary to form the concave portions 16 and 17 and the locking portion 18 in a close state. .
Therefore, the insertion recess 22 is formed at the center of the other end surface of the first mold 12, that is, the end surface of the second mold 13, and the recess 16 is formed at the center of the bottom surface of the insertion recess 22. The distal end portion 23 of the second mold 13 is narrowed through a step portion 24 and is slidably inserted into the insertion recess 22.
An insertion recess 25 is formed on the other end surface of the second mold 13, that is, an end surface on the base 11 side, and the recess 17 is formed in the center of the bottom surface on the back side of the insertion mold 25. In the center of the bottom of the rear side, an insertion site 26 to the insertion recess 25 is integrally projected.
Therefore, with the above configuration, even if the first and second molds 12 and 13 are elongated in the sliding direction, the recesses
16 and 17 approach the front end surfaces of the first and second molds 12 and 13.
In addition, it is preferable to form an oil groove on the sliding contact surface of the second mold 13 with the first mold 12 and the base 11 to ensure lubricity.

Then, as shown in FIG. 4, after the pipe 1a is inserted through the pipe insertion portions 15, 15a and 15b and chucked and set in the mold 10, the first and second molding dies 12 and 13 are sequentially accommodated in the receiving recesses 14. The pipe 1a bulges outside in the recesses 16 and 17 in the first and second molds 12 and 13 to reduce the length of the strokes of the first and second molds 12 and 13. The bowl-shaped second and third enlarged diameter portions 3
, 6 is manufactured.
Specifically, by sliding the first molding die 12 and contacting the second molding die 13, the second expanded diameter portion 3.
After that, the second mold 13 slides together with the first mold 12 and comes into contact with the base 11, thereby forming the third diameter-expanded portion 6.
After that, when the molding pressure at the time of molding is released, the stepped portion 24 of the second molding die 13 is brought into contact with the stopper 20 by the elastic restoring force of the compressed compression springs 19, 19a. The first mold 12 is automatically returned to the initial position by the elastic restoring force of the compression springs 21, 21 a, and the second and third diameter increases from the first and second molds 12, 13 in the mold 10. The parts 3 and 6 are configured to release automatically.
In other words, when the pipe 1a is set in the mold 10, the pipe 1a is chucked at the three pipe insertion portions 15, 15a, 15b. The second and third enlarged diameter portions 3 and 6 are formed in a continuous and continuous manner.

Next, the operation of the oil level gauge guide according to the present invention will be described.
When the lower end portion of the oil level gauge guide is inserted into the mounting hole H on the engine block P side, the O-ring 4 is first compressed and deformed to be in close contact with the intermediate portion of the mounting hole H, and then the sealing material 7 is attached to the mounting hole H. After contacting the lip, the bendable portion 9a is deformed so as to be raised so as to be accommodated in the mounting hole H, and the outer peripheral portion of the bendable portion 9a expands above the mounting hole H. Adhering to the inner peripheral surface of the taper part,
Finally, the lower end portion of the guide pipe 1 comes into contact with the step portion of the mounting hole H.

It is a front view of the oil level gauge guide which concerns on this invention. It is an enlarged view of the longitudinal cross-section of the front-end | tip part of the oil level gauge guide of FIG. It is sectional drawing which shows the attachment state of the oil level gauge guide of FIG. It is sectional drawing which shows the manufacturing process of the oil level gauge guide of FIG. It is an enlarged view of the longitudinal cross-section of the front-end | tip part of the oil level gauge guide of the prior art example 1. FIG. It is an enlarged view of the longitudinal section of the front-end | tip part of the oil level gauge guide of the prior art example 2. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Guide pipe 2 1st enlarged diameter part 3 2nd enlarged diameter part 4 O-ring 6 3rd enlarged diameter part 7 Seal material 9, 9a Bendable part
11 base
14 Housing recess
13 Second mold
12 First mold
15, 15a, 15b Pipe insertion part
16, 17 recess
22 Insertion recess
23 Tip
24 steps
25 Insertion recess
26 Insertion site

Claims (1)

The second molding die 13 is slidably accommodated in the inner side of the accommodation recess 14 provided in the base 11 and the first molding die 12 is slidably accommodated in the opening side. The first molding die 12 and 13 and the base 11 are penetrated. The pipe insertion portions 15, 15 a, 15 b having the same diameter are provided with chucking means for the pipe 1 a, and the concave portions 16, 17 are formed on the second molding die 13 side of the first molding die 12 and the base 11 side of the second molding die 13. Is formed so that the insertion portions 15a and 15b are positioned in the center of the recesses 16 and 17, and an insertion recess 22 is formed in the center of the end surface of the first molding die 12 on the second molding die 13 side. The concave portion 16 is formed at the center of the bottom surface of the concave portion 22, the tip portion 23 of the second mold 13 is thinned through the step portion 24, and is slidably inserted into the insertion concave portion 22. An insertion recess 25 is formed on the end surface of the mold 13 on the base 11 side, and the recess 17 is formed in the center of the back bottom surface of the insertion recess 25. Oil level gauge guide mold, characterized in that the inserted portion 26 into the insertion concave portion 25 is integrally projected.

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