JPH0538819Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to an attachment/detachment device for removably attaching a cup-shaped bowl to a body having an air flow passage of a pneumatic equipment such as a filter or a lubricator.

Problems to be Solved by Conventional Technologies and Ideas For example, a lubricator has a cup-shaped bowl for storing oil on the lower surface of a body in which an air flow passage having an orifice is transparent in a substantially horizontal direction; A bowl guard is installed to prevent the oil from scattering in the event that the bowl ruptures due to high pressure being applied inside the bowl.The oil in the bowl is sucked up and supplied to the orifice due to the pressure difference between the bowl and the orifice. Conventionally, the bowl attaching/detaching device for such lubricators and filters has been equipped with a plurality of hooks on the edge side of the circular inner peripheral surface of a mounting tube formed in the body. protrude at regular intervals in the circumferential direction, a plurality of flanges protrude at regular intervals on the outer periphery of the mouth rim of the bowl and bowl guard, and the flanges of the bowl and bowl guard are aligned with each other. The bowl and bowl guard are formed with unevenness to position them at the desired angle, and the flanges of the bowl and bowl guard are inserted into the mounting cylinder from between the hooks on the body, and the bowl and bowl guard are rotated at a certain angle. The locking tongue provided on the outer circumferential surface of the bowl guard is engaged with the engaging portion provided on the body through elastic deformation, so that the bowl guard is attached to the body by being hooked to the latch portion. A device is used to prevent the guard from rotating.

However, since such a device is attached and detached by elastic deformation of the tongue, there is a risk that the elastically deformed portion may break if it is repeatedly attached and detached. Furthermore, since the tongue piece is aligned with the engaging portion of the body, stress tends to concentrate, which may cause damage to the flange.

Means for Solving the Problem The present invention provides a means for solving such problems by forming a cutout at one end of at least one of the brim of the bowl guard, and inserting the cutout into the bowl guard through the cutout. A structure in which a claw piece is formed slightly protruding to the lower surface of the guard's flange, and a stopper is formed below the flange on the outer periphery of the bowl guard, the distance between the claw piece and the stopper matching the width between the hooking parts of the body. And so.

Functions and Effects of the Invention The present invention has the above-mentioned configuration, and the bowl guard and the bowl are aligned with the unevenness formed respectively, and fitted together with their respective flanges aligned, and the flanges of the bowl and bowl guard are engaged with the body. When the bowl and bowl guard are inserted into the mounting cylinder between the parts and rotated with the bowl and bowl guard pressed against the body, the claws of the bowl only protrude slightly to the underside of the bowl guard flange. The stopper of the bowl guard passes above the latching part and stops when it comes into contact with the end of the latching part on the front side in the rotating direction. In this state, when pressurized air flows through the air flow passage of the body, the pressure acts on the bowl and pushes it down together with the bowl guard, so that the claw piece of the bowl hooks onto the end of the above-mentioned latching part. The bowl and the bowl guard are protruded to the stopping position, and the rotation of the bowl and the bowl guard relative to the body is prevented, and the catching of the collar and the hook prevents the bowl and the bowl guard from escaping from the body. When removing the bowl and bowl guard from the body, press the bowl and bowl guard against the body, and the claws on the bowl will come off the latches on the body and be able to rotate, so that the flanges of the bowl and bowl guard can be removed from the body. The bowl and bowl guard are separated by rotating them until they reach between the latching parts of the body and pulling them away from the body. It is extremely easy to operate, and since it does not use elastic deformation to attach and detach, there are no parts that are easy to break, and the hooking part of the body and the flange of the bowl and bowl guard are joined flatly. Since stress concentration does not occur, it has the effect of providing excellent durability.

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

As shown in FIG. 1, the air filter A of this embodiment has a transparent cup-shaped bowl made of a highly rigid synthetic resin for storing removed water on the lower surface of a body 1 having a flow path for pressurized air. 2, and a bowl guard 3 made of a relatively tough synthetic resin is attached to the bowl 2 to prevent it from scattering in the event that the bowl 2 ruptures due to high pressure being applied to the bowl 2. Inlet 5 on one side of
When pressurized air flows in from the louver 7 attached to the lower end of the cylindrical partition wall 6 provided inside the body 1,
By passing between the inner peripheries of the bowl 2, it becomes a swirling flow and flows into the space outside the filter element 9 above the shielding plate 8, and moisture mixed in the air is separated and removed by centrifugal force. The removed moisture is collected in the bowl 2, and the air from which the moisture has been removed passes through the inside of the filter element 9 and flows out from the outlet 10 on the other side of the body 1.

Next, a structure for attaching and detaching the body 1, the bowl 2, and the bowl guard 3 will be explained.

At the lower end of the body 1, as shown in FIG.
A mounting tube 11 having a circular inner circumferential surface and a substantially square outer circumferential surface is formed, and four hooking portions 12 are provided on the edge side of the inner circumferential surface of the mounting tube 11 on each side of the square. Shallow triangular fitting recesses 13 are formed on the inner surfaces of two of the hooking portions 12a, which are protruded at angular intervals of 90 degrees so as to correspond to the central portion, and which correspond to each other at 180 degree intervals. 4 hooks 1
2 is a fitting groove 14 for the flanges 18, 23 of the bowl 2 and bowl guard 3, which will be described later. 23 relief holes 15 are transparently provided.

On the other hand, as shown in FIG. 4, the bowl 2 has four thick-walled flanges 18 protruding at 90-degree intervals on the outer periphery of a circumferential protrusion 17 provided slightly below the mouth edge. In addition, the bowl guard 3 has a shape in which a cylindrical portion 22 is formed at the upper end of a main body cylindrical portion 20 having a substantially rectangular outer shape and having a viewing window 21 therethrough for viewing the amount of water in the bowl 2. The cylindrical part 2
Four thin flanges 23 are also formed on the outer periphery of the mouth rim of the bowl 2 at 90 degree intervals so as to overlap the flanges 18 of the bowl 2 described above. Insertion grooves 25 in the vertical direction are located at two positions corresponding to each other at intervals of 180 degrees between each collar 18.
A protrusion 26 for positioning is formed on both sides of the lower end of the insertion groove 25, and a retaining protrusion 27 having a slope at the lower end is formed in the center of the insertion groove 25. Fitting holes 29 are provided at two positions corresponding to each other at 180 degree intervals between the flanges 23 on the edge of the guard 3 to be inserted into the insertion grooves 25 and into which the retaining protrusions 27 are fitted. An elastic tongue piece 28 is formed, and recesses 30 are formed on both sides of the tongue piece 28 to fit with the above-mentioned positioning protrusion 26 .

Of the four collars 23 of the bowl guard 3, the collar 23a located in front of each elastic tongue piece 28 in the clockwise direction has its rear end clockwise cut off by a certain width to form a cutout portion 32. At the same time, each insertion portion 25 of the four collars 18a of the bowl 2
A claw piece 33 is formed on the lower surface of the rear end of the collar 18a located clockwise forward, and a bowl guard 3 is formed on the lower surface of the collar 18a of the bowl 2.
When the flange 23a of the bowl guard 3 is overlapped, as shown in FIG. , cylindrical part 2 of bowl guard 3
Tsuba 23 provided with the above-mentioned cutout 32 on the outer periphery of 2
The hook part 1 of the body 1 is placed below the clockwise tip of the adjacent collar 23 with the tongue piece 28 sandwiched in between.
A stopper 35 that corresponds to the end face of the bowl 2 is projected, and the distance between the claw piece 33 and this stopper 35 when the bowl 2 and the bowl guard 3 are assembled is as follows.
The width matches the width between the hooks 12 of the body 1.

Further, in the lower position of the collar 23a of the cylindrical portion 22 of the bowl guard 3, where the above-mentioned cutout portion 32 is provided,
The elastic fitting pieces 3 each have a chevron shape and fit into the fitting recesses 13 on the inner surface of the hooking part 12a of the body 1 described above.
7 is formed by punching out, and the hooking part 12a provided with the above-mentioned fitting recess 13 has both ends slightly inward than the other hooking parts 12, as shown in FIG. The collars 23a and 23 of the bowl guard 3 are provided with elastic tongue pieces 28 and protrude toward the circumference.
The outer periphery of both ends of the mouth edge between the bowl 2 and the bowl guard 3 is slightly shaved.
8, 23 into the fitting groove 14 of the body 1,
Flanges 18a and 23a provided with claw pieces 33 and cutout portions 32
is aligned with the fitting groove 14 on the clockwise rear side in FIG.
The bowl guard 3 can be inserted by passing through the edge cut on the outer periphery, and if the position is shifted by 90 degrees, the locking part 12a
The uncut edge of the bowl guard 3 comes into contact with the inward protrusion of the bowl guard 3, so that it cannot be inserted.

Next, the procedure for attaching the bowl 2 will be explained.

First, as shown in Figure 4, bowl guard 3
, align the elastic tongue piece 28 with the insertion groove 25 of the bowl 2 and fit it on the outside of the bowl 2, and while the elastic tongue piece 28 rides on the retaining protrusion 27, the collar 23 of the bowl guard 3 is inserted into the bowl 2. When the collar 18 is pushed in until it hits the lower surface of the collar 18, the retaining protrusion 27 is fitted into the fitting hole 29 of the elastic tongue piece 28, the elastic tongue piece 28 is fitted into the insertion groove 25, and the protrusion 26 for positioning the bowl 2 is inserted. is fitted into the recess 30 of the bowl guard 3, and as shown in FIG. , other tsuba 1
With 8 and 23 aligned, bowl guard 3
is attached to the bowl 2 in a non-rotatable and non-removable manner. Next, align the set of four flanges 18 and 23 of the integrated bowl 2 and bowl guard 3, and the set of the flanges 18a with the claw pieces 33 and the flanges 23a with the cutout 32, with the marks (not shown). As mentioned above, in FIG. 5, among the fitting grooves 14 between the hooking parts 12 of the body 1, the fitting grooves 14 are located clockwise rearward of the hooking parts 12a provided with the fitting recesses 13. After aligning, Figure 5a and Figure 7a
As shown in FIG.
When pressed against the rear end of the mounting tube 11 of the bowl 2 and rotated clockwise in FIG. 5 and in the direction of the arrow in FIG. Since it protrudes only slightly from the flange 23a, it passes above the hooking part 12a of the body 1, and each flange 18, 23 fits into the relief hole 15 of the body 1.
Also, the chevron-shaped elastic fitting piece 37 of the bowl guard 3 is elastically deformed and rotates while riding on the inner surface of the hooking part 12a, as shown in FIGS. 5b, 6, and 7b. So, stopper 35 of bowl guard 3
hits the end of the locking part 12 in the forward direction of rotation, and at the same time, the chevron-shaped elastic fitting piece 37 fits into the fitting recess 13 on the inner surface of the locking part 12a and stops, and at that time, Since the spacing between the claw piece 33 and the stopper 35 matches the width of the fitting groove 14 between the hook parts 12, the claw piece 33 passes through the catch part 12a of the catch part 35 that is in contact with the stopper 35. It is located above the end surface corresponding to 12. In this state, when pressurized air is flowed through the air filter A, the pressure acts on the inside of the bowl 2, and the bowl 2 is pushed down together with the bowl guard 3 in the direction of the arrow in FIG. Since the piece 33 protrudes slightly below the flange 23a of the bowl guard 3, when the flange 23 of the bowl guard 3 is pressed against the upper surface of the catch part 12, the tip of the claw piece 33 touches the catch part 12a.
This prevents the bowl 2 and the bowl guard 3 from rotating in both forward and reverse directions with respect to the body 1.
The catch 2 prevents the bowl 2 and bowl guard 3 from escaping from the body 1.

When removing the bowl 2 and bowl guard 3 from the body 1, push the bowl 2 and bowl guard 3 into the rear end of the mounting tube 11 of the body 1, as shown in Fig. 7b.
As shown in FIG. 2, the claw piece 33 of the bowl 2 escapes above the catch part 12a of the body 1 and becomes rotatable, and the collars 18 and 23 connect the bowl 2 and the bowl guard 3 between the catch part 12 of the body 1. The bowl 2 and the bowl guard 3 may be pulled out from the mounting tube 11 of the body 1 by rotating in the opposite direction to the above until reaching the insertion groove 14 of the body 1. In addition, when removing the bowl guard 3 from the bowl 2, the tip of the elastic tongue piece 28 of the bowl guard 3 is raised to remove the fitting hole 29 from the retaining protrusion 27, and the bowl guard 3 is pulled out.

Note that the present invention is not limited to the air filter A shown in the above embodiment, but also includes a cup-shaped bowl for storing oil and a cup-shaped bowl for protecting the bowl on the lower surface of the body in which an air flow passage having an orifice is transparent in a substantially horizontal direction. For lubricators fitted with bowl guards,
The same can be applied.

[Brief explanation of the drawing]

Fig. 1 is a sectional view of one embodiment of the present invention, Fig. 2 is a partial perspective view of the bowl and bowl guard fitted together, Fig. 3 is a perspective view of the body, and Fig. 4 is a sectional view of an embodiment of the present invention.
The figure is a perspective view illustrating the procedure for assembling the bowl and bowl guard, Figures 5a and b are sectional views taken along line XX of Figure 1, illustrating the procedure for attaching and detaching the bowl and bowl guard to the body. 6 is a partially enlarged view of FIG. 5b, and FIGS. 7a to 7c are developed views for explaining the procedure for attaching and detaching the bowl and bowl guard to the body. A... Air filter, 1... Body, 2... Bowl, 3... Bowl guard, 11... Mounting tube, 1
2, 12a... Latching portion, 14... Fitting groove, 18,
18a... tsuba, 23, 23a... tsuba, 26... convex part, 30... recessed part, 32... excised part, 33... claw piece, 35... stopper.

Claims (1)

[Scope of utility model registration request] A pneumatic device in which a cup-shaped bowl is removably attached to a body having an air flow passage, such as a filter or a lubricator, has a plurality of hooks on the mouth side of the circular inner peripheral surface of a mounting tube formed in the body. Stop portions are protruded at regular intervals in the circumferential direction, and a plurality of flanges are protruded at regular intervals on the outer periphery of the mouth edge of the bowl and a bowl guard made of synthetic resin that is fitted onto the bowl. , and the bowl and the bowl guard are formed with unevenness for positioning the bowl and the bowl guard at an angle where the flanges align with each other, and the flanges of the bowl and the bowl guard are connected to the hooking portion of the body. In the bowl attaching/detaching device, the bowl is attached to the body by fitting the bowl and the bowl guard into the mounting tube through a gap and rotating the bowl and the bowl guard by a certain angle, thereby hooking the brim to the hooking portion and attaching the bowl to the body. A cutout is formed in one end of at least one of the brim of the guard, and a claw piece is formed in the brim of the bowl that slightly projects through the cutout to the lower surface of the brim of the bowl guard, A bowl attaching/detaching device for pneumatic equipment, characterized in that a stopper is formed below the flange on the outer periphery of the bowl guard, and a stopper whose distance from the claw piece matches the width between the hooking parts of the body.