JPH0229285Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an attachment/detachment device for freely attaching a synthetic resin or glass cup-shaped bowl to the body of a pneumatic device such as a lubricator or filter.

Problems to be Solved by Conventional Technologies and Ideas For example, a lubricator is a cup-shaped cup made of synthetic resin or glass that stores oil on the lower surface of a body in which an air flow passage with an orifice is transparent in a substantially horizontal direction. A bowl guard is attached to the body and the bowl to prevent the oil from scattering if the bowl ruptures.The oil in the bowl is sucked up by the pressure difference between the bowl and the orifice and supplied to the orifice. Conventionally, the bowl attaching/detaching device for such a lubricator has included a plurality of flanges protruding from the outer periphery of the bowl and bowl guard at regular intervals. , a butt that protrudes into the mounting hole by fitting into the mounting hole from between a plurality of hooks that project at regular intervals in the circumferential direction on the inner peripheral surface of a circular mounting hole formed in the body. A device is used in which the bowl and bowl guard are rotated at a certain angle so that the two flanges are sandwiched between the hooking part and the abutting part.
If the bowl guard is made of metal, when the flanges of the bowl and bowl guard are stacked together and sandwiched between the hooking part and the abutting part to attach to the body,
Since the metal flange is pressed against the flange of the synthetic resin or glass bowl, excessive stress may be generated locally and the flange of the bowl may be damaged, such as cracking.

Note that this situation is not limited to lubricators, but also applies to other pneumatic equipment, such as filters, in which bowls can be removed and freely attached.

Means for Solving the Problems The bowl attaching/detaching device for pneumatic equipment of the present invention was developed against the background of the above-mentioned circumstances, and includes a bowl guard made of metal and an inner periphery of the mouth edge of the bowl guard. In addition, the flange, which is sandwiched between the flange of the bowl and the bowl guard, has a structure in which a synthetic resin intermediate ring protruding from the outer periphery of the mouth rim is fitted.

Functions and Effects The present invention has the above-mentioned structure, and since the bowl guard is made of metal, sufficient strength can be obtained even if the bowl guard is made thin, so it can be made lightweight and manufactured at low cost. Moreover, by fitting a synthetic resin intermediate ring protruding from the outer periphery of the rim of the bowl guard onto the inner periphery of the rim of the bowl guard, the collar is sandwiched between the bowl and the rim of the bowl guard. , the flange of the synthetic resin interpolation ring is pressed against the flange of the synthetic resin or glass bowl.
The contact surface has good conformability, and local stress concentration is avoided, which has the effect of preventing damage to the bowl.

Embodiment Hereinafter, an embodiment in which the present invention is applied to a lubricator A will be described based on the accompanying drawings.

The lubricator A of this embodiment has a transparent cup-shaped bowl 3 made of a synthetic resin such as polycarbonate for storing oil, and a transparent cup-shaped bowl 3 made of a synthetic resin such as polycarbonate for storing oil on the lower surface of a body 1 with an air flow passage 2 horizontally transparent therethrough. A bowl guard 4 press-molded from a thin metal plate such as aluminum is attached to the bowl 3 to protect the bowl 3, and the pressure difference between the orifice 5 in the bowl 3 and the air flow passage 2 causes the pressure inside the bowl 3 to increase. Oil is sucked up above the dripping tube 6 and drips into the dripping tube 6 from the dripping hole 7 on the top surface of the dripping tube 6,
It is supplied from the supply hole 8 to the orifice 5 and mixed into the air.

Next, the structure of the portion where the bowl 3 and bowl guard 4 are attached to and removed from the body 1 will be explained.

The lower end of the body 1 has a circular inner peripheral surface,
A mounting cylinder 11 whose outer circumferential surface is a regular octagon and whose lower end is shaved to form a circular shape is formed, and four hooking parts 12 are arranged at angular intervals of 90 degrees on the edge side of the inner circumferential surface of this mounting cylinder 11. A step part 13 is provided above the catch part 12 at a constant distance from the catch part 12, and a step part 13 is provided at a position slightly below the mouth edge of the bowl 3. Four flanges 15 are protruded at 90 degree intervals on the outer circumference of the raised protrusion 14, and four flanges 16 are protruded at 90 degree intervals on the outer circumference of the mouth edge of the bowl guard 4. An interposed ring 18 is fitted onto the inner periphery of the mouth edge of the bowl guard 4.
The interposed ring 18 is made of synthetic resin such as polyamide, and is formed into an annular shape that tightly fits the inner periphery of the bowl guard 4 in a free state. Ring insertion 18
Four flanges 20 are protruded at 90 degree intervals on the outer periphery of the upper edge, and each of the flanges 20 of the interposed ring 18
A protrusion 21 having a slope on the lower surface side is formed at a lower position of the bowl guard 4 to fit into a fitting hole 22 provided in a lower position of each collar 16 of the bowl guard 4. A stepped fitting protrusion 24, which is larger in height than the outer circumferential surface and narrower in width at the upper end, is provided on the outer circumferential surface at a position between adjacent flanges 20, 20 corresponding to each other on both sides of the flange. is formed by protruding below the lower edge of the intervening ring 18, and this fitting protrusion 24
A claw piece 25 whose tip end is spaced outward from the fitting protrusion 24 by pressing the rear end toward the center of the intervening ring 18 is integrally formed on the lower end of the ring 18 with an elastic bending piece 26 interposed therebetween. , Step portions 24a of the fitting protrusion 24 are provided on both edges of the opening side so that the above-mentioned fitting protrusion 24 is tightly fitted into the position between the adjacent flanges 16, 16 on the outer peripheral surface of the bowl guard 4. Latching part 2 to be hooked to
A window hole 27 formed by connecting a fitting hole 28 with holes 8a and 28a and a relief hole 29 for a claw piece 25 below the fitting hole 28.
is formed.

Further, a recess 30 for positioning is formed on the upper edge of the fitting projection 24 of the interposed ring 18, and the recess 30 is located between the flanges 15 on the lower surface of the protrusion 14 of the bowl 3. A protrusion 31 that fits into the fitting protrusion 24 is formed at a position that makes a 90 degree angle with the fitting protrusion 24 out of the four positions located between the collar 20 on the upper edge of the intervening ring 18. , connecting pieces 32, 32 each having a fitting hole 33 are formed in a protruding manner.
A slit 34 is formed continuously on the ridge 14 of the bowl 3, and forms a 90 degree angle with the positioning protrusion 31 of the four locations located between the flanges 15, 15 of the protrusion 14 of the bowl 3. Grooves 35 that fit into the connecting pieces 32 are formed at the two positions, respectively, and protrusions 36 having slopes on the lower surface side that fit into the fitting holes 33 of the connecting pieces 32 are formed in each groove 35. In addition, two engaging grooves 38, 38, into which the tips of the protruding claws 25 of the intervening ring 18 are fitted, are formed on the lip of the mounting tube 11 of the body 1. , 12, with an interval of 180 degrees between them.

Next, the procedure for attaching the bowl 3 will be explained.

First, as shown in FIG.
7 from the inside to the outside, insert the fitting protrusion 2.
4 to the position of the fitting hole 28 of the window hole 27, and then push the interposed ring 18 into the rim of the bowl guard 4, the lower surface of the protrusion 21 of the interposed ring 18 will fit into the rim of the bowl guard 4. When the interposed ring 18 is pushed in while contracting in diameter against the elastic force, and the flange 20 of the interposed ring 18 touches the flange 16 of the bowl guard 4, the protrusion 21 engages the fitting of the bowl guard 4. Fitted into the hole 22, the interposed ring 18 expands due to its restoring elasticity and comes into close contact with the inner circumference of the mouth edge of the bowl guard 4, and the fitting protrusion 24 is tightly fitted into the fitting hole 28 of the window hole 27. Interpolation ring 18
The interposed ring 18 is fitted to the inner periphery of the mouth edge of the bowl guard 4 with the collar 20 overlapping the upper surface of the collar 16 of the bowl guard 4.

Next, place the bowl 3 inside the bowl guard 4.
When the positioning protrusion 31 is fitted into the recess 30 of the fitting protrusion 24 of the intervening ring 18,
When the fitting is completed, the tip of the connecting piece 32 protruding from the intervening ring 18 hits the lower surface of the protrusion 36 of the bowl 3, as shown by the chain line in FIG. 35, and when the flange 15 of the bowl 3 touches the flange 20 of the intervening ring 18, the protrusion 36 fits into the fitting hole 33 of the connecting piece 32, as shown by the solid line in the figure. At the same time, the positioning recess 30 and the protrusion 31 are fitted into each other, and the bowl 3 and bowl guard 4 are aligned with their respective flanges 15.
and 16, and are integrally coupled with the collar 20 of the interposed ring 18 being sandwiched between them.

Then, the integrated bowl 3, interposed ring 18, and flanges 15, 20, and 16 of the bowl guard 4 are fitted into the mounting cylinder 11 from between the hooking parts 12 of the body 1 until they hit the abutment step part 13. Then, the claw piece 25
While bending the elastic bending piece 26, the tip of the
When the bowl 3 and bowl guard 4 are rotated by a certain angle, the flanges 15, 20, and 16 are caught between the abutment step 13 and the hook 12, and the bowl 3 and bowl guard 4 are held together. The guard 4 is attached to the body 1, and the tips of the claw pieces 25 are fitted into the engagement grooves 38 of the body 1, so that the bowl 3 and the bowl guard 4 are connected to each other.
rotation is prevented and held in the attached state.

On the other hand, when removing the bowl 3, push the rear end of the claw piece 25 to remove its tip from the engagement groove 38, and then remove the bowl 3 and bowl guard 4 from the collars 15, 20, and 16.
When the bowl guard 4 is rotated until it is positioned between the hooks 12 and then pulled, the flange 1
5, 20, and 16 pass between the hooks 12, and the bowl 3, interposer ring 18, and bowl guard 4 are removed together.

Then, bend the connecting piece 32 of the intervening ring 18 outward, and insert the protrusion 36 of the bowl 3 into the fitting hole 3 of the connecting piece 32.
3 and pull the bowl 3, the bowl 3 can be separated from the bowl guard 4. When removing the interposed ring 18, the diameter of the interposed ring 18 is reduced and the protrusion 21 is removed from the bowl guard 4. Remove the guard 4 from the fitting hole 22, tilt the intervening ring 18, and insert the fitting protrusion 24 into the window hole 2.
The intermediate ring 18 can be removed from the bowl guard 4 by removing it from the fitting hole 28 of 7 and passing the claw piece 25 from the outside to the inside of the window hole 27.

In this embodiment, when fitting the intervening ring 18 to the inner periphery of the mouth edge of the bowl guard 4, in addition to fitting the protrusion 21 into the fitting hole 22, a stepped fitting protrusion is inserted into the fitting hole 22. Since the part 24 is tightly fitted into the fitting hole 28 of the window hole 27, not only can alignment be performed accurately, but also the bowl guard 4 can be easily pulled or turned when removed. When you want to
Force is applied to the stepped portion 24a of the fitting protrusion 24 from the hooking portion 28a, and the fitting hole 2 is applied to the side surface of the fitting protrusion 24.
The force applied to the protrusion 21 from the side surface of the protrusion 8 is reduced, and the protrusion 21 is prevented from being damaged such as being torn off.

Further, in this embodiment, a locking claw piece 25 is formed on the interposed ring 18, and when the bowl 3 and bowl guard 4 are rotated to the mounting position, the claw piece 25
The tip fits into the engagement groove 38 of the body 1 and is automatically locked in the mounting position, and when removed, the lock can be easily released by simply pressing the rear end of the claw piece 25. Can be done.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of an embodiment of the present invention, Fig. 2 is an exploded perspective view thereof, Fig. 3 is a sectional view showing the procedure for fitting the interfering ring to the bowl guard, and Fig. 4 is the bowl guard. FIG. 3 is a cross-sectional view showing the procedure for externally fitting the bowl guard to the container. A... Lubricator, 1... Body, 3... Bowl, 4... Bowl guard, 11... Mounting tube, 1
2...Latching part, 13...Abutting step part, 15...Tsuba,
16... Tsuba, 18... Interpolated ring, 20... Tsuba, 25
...Claw piece, 26...Elastic bending piece, 27...Window hole,
38...Engagement groove.

Claims (1)

[Claims for Utility Model Registration] 1. A cup-shaped bowl made of synthetic resin or glass, and a bowl guard fitted onto the outside of the bowl, in the body of a pneumatic device such as a lubricator or a filter, the bowl and the bowl. There are multiple tsuba protruding at regular intervals on the outer periphery of each mouth edge of the guard.
A circular mounting hole formed in the body is fitted into the mounting hole from between a plurality of hooks protruding at regular intervals on the inner circumferential surface of the mounting hole at regular intervals in the circumferential direction, and protrudes into the mounting hole. In the bowl attaching/detaching device, the bowl guard is attached by sandwiching both the flanges between the hooking part and the abutting part by abutting against the abutting part and rotating the bowl and the bowl guard by a certain angle. is made of metal, and a flange sandwiched between the bowl and the flange of the bowl guard is fitted onto the inner periphery of the mouth rim of the bowl guard, and a synthetic resin intermediate ring protruding from the outer periphery of the mouth rim. A bowl attaching/detaching device for pneumatic equipment. 2. The interposed ring protrudes from a window hole formed in the bowl guard toward its outer circumferential surface, and is elastically deformed at a position where the bowl and bowl guard are attached to the body to engage an engaging portion provided on the body. A bowl attaching/detaching device for pneumatic equipment according to claim 1, further comprising a claw piece that engages with the bowl and prevents rotation of the bowl and the bowl guard.