JPH0725488Y2 - Seal cap - Google Patents

Description

[Detailed description of the device] << Industrial application field >> The present invention prevents the leakage of liquid such as oil of the equipment by masking the screw holes provided on the outer surface of the equipment when cleaning or painting the equipment. The present invention relates to a seal cap, and more particularly, to an integrally molded seal cap.

<< Prior Art >> As shown in FIG. 5, in the conventional seal cap, a detachable knob portion a and a male screw portion b are integrally formed of metal, and the inner end surface of the detachable knob portion a is sealed. And a sealing material c is interposed between the outer end surface of the object to be mounted and the sealing material c.
It is usual that the seal is pressed against the article to be sealed.
O-rings or packings made of rubber or synthetic resin are used for the sealing material c, and these sealing caps are used, for example, for cleaning the equipment with water, cleaning the pretreatment liquid for coating, or masking seals for screw holes during coating, Or used to prevent oil leakage.

<< Problems to be Solved by the Invention >> However, in the above-described conventional seal cap, the O-ring, the packing, and the like, which are the seal materials c, are expensive, and the metal seal cap is relatively expensive. When used many times, the cost for sealing the screw holes increases, which in turn increases the manufacturing cost of the device.

Therefore, in order to solve these problems, when the seal cap is used for cleaning the equipment or preventing oil leakage, it is considered to reuse the seal cap for cost reduction.

However, since the sealing material c such as an O-ring or packing is used by being compressed and deformed and used under many severe conditions, the sealing material c is likely to be damaged, cracked, or settled. However, there is a problem that the reliability of the seal is extremely poor when the seal material c of the seal cap is reused. On the other hand, when the seal cap is used for coating the equipment, the coating film is laminated and adheres to the entire seal cap.Therefore, if this seal cap is reused, the adhered coating film fragments and debris will fall off. However, there is a problem that the seal cannot be sufficiently secured because it is mixed or adhered to the seal portion. For this reason, since the used seal cap is usually discarded or repaired, the cost of the seal cap increases and the manufacturing cost of the device increases. Furthermore, when mounting these seal caps, it takes time to insert the sealing material, and since it is necessary to handle the sealing material c so as not to damage it, there is a problem that a lot of time is required for mounting.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art and to provide an inexpensive and easily removable seal cap that does not require an expensive seal material such as an O-ring or packing.

<Means for Solving the Problems> In order to achieve the above object, the present invention provides a seal cap in which a detachable knob portion and a male screw portion screwed into a hole formed in an object are coaxially integrally formed. , A substantially disk-shaped collar portion between the attaching / detaching knob portion and the male screw portion, with the outer edge of the inner end surface inclined to the male screw portion side with respect to the base end portion,
It is configured so as to be coaxially molded, and when the seal cap is mounted, the outer edge of the inner end surface of the collar portion is brought into contact with the outer end surface of the mounted object for sealing.

<Operation> When the male screw portion of the seal cap is screwed into the screw hole of the mounted object, the outer edge of the inner end surface of the collar portion is formed so as to be inclined toward the male screw portion with respect to the base end portion. At the outer edge of the end face, the object to be attached surely abuts the outer end face before the vicinity of the base end portion of the end face, so that the seal inside and outside the screw hole is secured.

<< Embodiment >> An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 shows a seal cap 1 in which a detachable knob portion and a male screw portion are coaxially integrally formed, and an object to be attached (not shown) is arranged on the right side of the figure. In the figure, reference numeral 2 indicates a detachable knob portion, and reference numeral 3 indicates a male screw portion.

A substantially disk-shaped collar portion 4 is coaxially integrally formed between the detachable knob portion 2 and the male screw portion 3. As shown in FIG. 2, the attaching / detaching knob portion 2 has a substantially cylindrical base material 2a, and a slit 2b for attaching / detaching tool provided on the outer end portion of the base material 2a and having a cross-shaped cross section. And, for example, six projecting pieces 2c integrally formed on the outer peripheral portion of the base material 2a.

The collar portion 4 is substantially flange-shaped, and includes a flange-shaped base material 4a, as shown in FIG. 3, and an inner end surface 4b,
It has an outer edge 4c of the inner end surface 4b and a base end portion 4d of the inner end surface 4b.

The outer edge 4c of the inner end surface 4b of the collar portion 4 is the base end portion 4d.
On the other hand, the outer edge 4c of the inner end surface 4b is formed to be inclined toward the male screw portion 3 side, and protrudes toward the male screw portion 3 side from the base end portion 4d of the inner end surface 4b.

The inclination angle of the inner end surface 4b of the collar portion 4 toward the male screw portion 3 side is considered to be approximately 0.5 to 10 degrees, although it depends on the application.

On the other hand, as shown in FIG. 3, the male screw portion 3 is axially formed so that its end is in contact with the base end portion 4d of the inner end surface 4b of the collar portion 4, and the screw thread 3a is attached. Is formed to have the minimum number of thread threads, for example, 1 to 3 threads.

The material cost of the integrally formed seal cap 1 with a collar is low, and if it is made of synthetic resin that is easy to mold, the cost can be significantly reduced.

The integrally formed seal cap 1 with a collar as described above is the fourth
As shown in the figure, in a predetermined device (power steering pump for an automobile), a mounting end portion 5 having a screw hole formed therein is provided with a detachable knob portion 2 by a manual operation or a tool operation. It is designed so that it can be rotated and screwed on for sealing.

Next, the operation will be described based on the configuration described above.

The male screw portion 3 of the seal cap 1 is screwed into the screw hole of the mounting end portion 5 of the device, which is the object to be mounted, by rotating the detachable knob portion 2. Then, the inner end surface 4b of the collar portion 4 is
Since the outer edge 4c is formed so as to be inclined toward the male screw portion 3, the outer edge 4c of the inner end surface 4b is located outside the object to be attached before the base end portion 4d of the inner end surface 4b during the screwing operation. When the screw comes into contact with the end face and the screw is tightened, the collar portion 4 elastically deforms and further comes into close contact with the end face.

Therefore, the outer edge 4c comes into liquid-tight contact with the outer end surface of the object to be mounted, so that the inside and outside of the screw hole are sealed.

In addition, since the attachment / detachment knob portion 2 of the seal cap 1 has the attachment / detachment tool slit 2b formed in a substantially cross shape,
It can be easily attached / detached with a type driver or a-type driver, and since the protrusion 2c is formed, it can be attached / detached with a manual tool or other tools.

Further, since the male screw portion 3 has the screw thread 3a as the minimum necessary number of threads, the attaching / detaching operation becomes easier.

Furthermore, if the seal cap 1 is integrally formed of, for example, synthetic resin, an inexpensive seal cap can be easily manufactured.

<Effects of the Invention> As described above, the seal cap according to the present invention has a substantially disk-shaped collar portion between the attaching / detaching knob portion and the male screw portion, and the outer edge of the inner end surface of the male cap portion with respect to the base end portion. Since the outer edge of the inner end surface of the collar portion is brought into contact with the outer end surface of the object to be sealed to form an O-ring or packing which is an expensive sealing material As a result, it is possible to perform a reliable seal without using a seal cap, and it is possible to reduce the manufacturing cost of the seal cap and thus the manufacturing cost of the device. Further, since the seal cap can be mass-produced by integral molding using an inexpensive material such as synthetic resin, the cost can be further reduced.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment of the present invention, and FIG.
The left side view of the figure, FIG. 3 is a detailed view of part B of FIG. 1, and FIG.
FIG. 5 is a view showing how the seal cap is attached to a device, and FIG. 5 is a side view showing a conventional seal cap. 1 ... Seal cap, 2 ... Detachable knob, 3 ...
Male screw part, 4 ... Collar part, 4b ... Inner end face of collar part, 4c
The outer edge of the inner edge of the collar.

Claims (1)

[Scope of utility model registration request] 1. A seal cap in which a detachable knob portion and a male screw portion screwed into a hole formed in an object to be mounted are coaxially integrally formed, and a disk is substantially provided between the detachable knob portion and the male screw portion. -Shaped collar part is coaxially integrally molded by inclining the outer edge of this inner end face to the male screw part side with respect to the base end part, and when attaching the seal cap, the outer edge of the inner end face of the collar part contacts the outer end face of the object to be attached A seal cap characterized by being brought into contact with and sealing.