JPS5930242Y2 - Sight glass device in liquid tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a viewing window device for viewing and confirming the liquid level inside an oil tank of a mask cylinder or other liquid tank from the outside.

In order to maintain the level mark displayed on the transparent body at the specified position, the transparent body can be easily attached to the viewing window opened in the side wall of the liquid tank without leaking liquid. It is required to prevent the transparent body from rotating and to prevent the transparent body from being removed from the outside of the tank due to mischief and causing liquid leakage.

An object of the present invention is to provide a device with a simple structure that can satisfy all such requirements.

Hereinafter, one embodiment of the present invention will be described with reference to the drawings. In Fig. 1, M is a brake mask cylinder attached to the steering handle of a motorcycle, and the cylinder body 1 and the liquid tank of the present invention connected to the upper part thereof are The oil tank 2 is integrally cast from a light alloy such as A1 alloy.

A brake lever L is provided in the cylinder hole 3 of the cylinder body 1.
The pistons 4 operated by the pistons 4 slide together to define a hydraulic chamber 5 in front thereof, and hydraulic oil F to be supplied to the hydraulic chamber 5 is stored in the oil tank 2.

A cover plate 2a is removably fixed to the upper open end of the oil tank 2 with a diaphragm 6 in between by bolts γ.

As clearly shown in FIGS. 1 and 2, a circular viewing window 8 is opened on the side wall of the oil tank 2 facing the motorcycle operator, and a cup-shaped transparent body 9 made of chemically resistant synthetic resin is opened in the side wall of the oil tank 2 facing the motorcycle operator. is fitted with its closed end 9a facing outward, and its closed end 9a
A raised lower limit level mark 9m extending horizontally is displayed on the inner surface of a.

A stopper flange 10 is integrally provided on the outer peripheral surface of the transparent body 9, and correspondingly, a recess 11 surrounding the viewing window 8 is formed on the outer surface of the oil tank 2. The flange 10 contacts the outer surface of the oil tank 2 via the annular seal member 12.

Thereby, the seal member 12 is held within the recess 11 to prevent oil leakage from the viewing window 8.

Furthermore, the open end 9b of the transparent body 9 protrudes into the oil tank 2, and a pair of vertical locking grooves 13, 13 are provided on both left and right side surfaces of the protruding end 9b. The pieces 14 are engaged as follows to prevent the transparent body 9 from coming off the viewing window 8.

That is, the locking piece 14 is made of a material rich in elasticity, such as a spring steel plate, and in particular, as shown in FIG.
, 14a, and these clamping legs 14a, 14a are curved in the front-rear direction and have locking claws 15, 15 protruding from their lower end facing surfaces.

If both the clamping legs 14a, 14a are inserted into the locking grooves 13, 13 of the transparent body 9 from above along the inner surface of the oil tank-2, the clamping legs 14a, 14a will hold the transparent body due to their elasticity. 9 is held and pulled toward the inside of the oil tank 2 to apply a pressing force to the stopper flange 10 against the seal member 12.

Further, the locking claw 15 of each clamping leg 14a is connected to the corresponding locking groove 1.
3, the clamping legs 14a are displaced inward by the elasticity of each clamping leg 14a and engage with the lower surface of the transparent body 9.

In this way, the locking piece 14 is locked to the transparent body 9 and prevents the transparent body 9 from coming off from the viewing window 8.

Both clamping legs 14a of the locking piece 14 are provided on the inner surface of the oil tank 2.
, 14a, the horizontal positioning step portion 16,1 comes into contact with the lower end surface of
These stepped portions 16, 16 hold the transparent body 9 in the normal rotational position via the locking pieces 14 that come into contact with the stepped portions 16, 16, and keep the level mark 9m in the normal horizontal position.

When the brake lever L is operated to move the piston 4 forward, hydraulic pressure is generated in the hydraulic chamber 5, and this is transmitted to the wheel cylinder of the front brake through a hydraulic conduit (not shown) to operate it. .

By repeating this operation, the amount of hydraulic oil F stored in the oil tank 2 decreases, and if the oil level drops in the hollow part 1 of the transparent body 9,
This can be seen from the outside of the closed end 9a of the transparent body 9, and when it is recognized that the oil level has reached the level mark 9m, the oil tank 2 is immediately opened to replenish the hydraulic oil F. It is.

As described above, according to the present invention, the cup-shaped transparent body 9 is fitted into the viewing window 8 opened in the side wall of the oil tank 2, that is, the liquid tank, with its closed end 9a facing outward. A stopper flange 10 protruding from the outer periphery of the liquid tank 2 is brought into contact with the outer surface of the liquid tank 2 via a sealing member 12, and is provided on the left and right outer surfaces of the end portion of the transparent body 9 protruding into the liquid tank 2 in the vertical direction. Since the locking piece 14 that comes into contact with the inner surface of the liquid tank 2 and clamps the transparent body 9 is engaged with the locking groove 13.13 of By inserting the transparent body 9, it is possible to easily and reliably attach the transparent body 9, and the sealing member 12 can be held securely, and liquid leakage from the viewing window 8 can be prevented.

Furthermore, since the locking piece 14 cannot be removed when the liquid tank 2 is in the closed state, removal of the transparent body 9 due to mischief can be prevented, and liquid leakage can be avoided.

Furthermore, a positioning step 16 is formed on the inner surface of the liquid tank 2 to abut against the lower end surface of the locking piece 14 to prevent rotation of the transparent body 9. It is also possible to hold the transparent body 9 in a proper position without providing a rotation prevention protrusion, and in particular, not forming a rotation prevention protrusion on the outer periphery of the transparent body 9 is effective in ensuring liquid tightness of the viewing window 8. This is extremely effective in simplifying the structure of the locking piece 14 and preventing damage to the diaphragm 6 that closes the opening of the liquid tank 2 by not forming a locking protrusion on the broken locking piece 14.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention, and Fig. 1 is a rear view of the main part taken longitudinally, Fig. 2 is an enlarged cross-sectional view of Fig. 1 along the ■-■ Longitudinal cross-sectional view, FIG. 4 is a perspective view of the locking piece. 2... Oil tank as a liquid tank, 8... Peephole, 9
... Transparent body, 9a... Closed end, 9b... Open end, 10... Stopper flange, 12... Seal member, 13... Locking groove, 14... Locking Piece, 16...
Positioning step.

Claims (1)

[Scope of utility model registration request] A cup-shaped transparent body 9 is fitted into a viewing window 8 opened in the side wall of the liquid tank 2 with its closed end 9a facing outward, and a stopper flange 10 protruding from the outer circumferential surface of the transparent body 9 is fitted as described above. Vertical locking grooves 13.1 are provided on the left and right outer surfaces of the open end 9b of the transparent body 99, which is brought into contact with the outer surface of the liquid tank 2 via the seal member 12 and protrudes into the liquid tank 2.
3, engage the locking piece 14 that comes into contact with the inner surface of the liquid tank 2 and clamps the transparent body 9, and engages with the lower end surface of this locking piece 14 to prevent the rotation of the transparent body 9. A viewing window device that can be turned on to a liquid tank, which has a positioning step 16 protruding from the inner surface of the liquid tank 2 to prevent the liquid tank from moving.