JPS6234576Y2 - - Google Patents

Description

[Detailed explanation of the invention] This invention allows for easier attachment and detachment of the case compared to the screw-type mechanism commonly used in the past, and is also less likely to accidentally separate compared to the usual one-touch mechanism. This relates to a case mounting mechanism with a small number of cases.

With the usual one-touch attachment/detachment mechanism, the lock to keep the case and case guard connected to the main body is not always perfect, so the lock may come off during use, causing the case to detach from the main body. There is also a risk that the case guard may fall off, and this is a point that must be especially taken care of in case of one-touch attachment/detachment type. This idea proposes a mechanism that has an extremely simple structure and can firmly maintain a locked state.

Next, an embodiment of this invention shown in the drawings will be described.

In FIGS. 1 to 3, reference numeral 1 denotes a cylindrical case with a bottom, and a mouth edge 2 of this case 1 is intermittently formed with protrusions 3 in the circumferential direction. As shown in the cross section on the right side of Figure 1,
The mouth edge portion 2 is provided with protrusions at several locations (four locations in the illustrated embodiment) at its largest diameter portion, and some of these protrusions 3 extend downward to form protrusions 3'. The case 1 is generally made of transparent synthetic resin or glass.

Next, the case guard 4 shown in Figures 4 to 6
is generally made of metal or synthetic resin, has a cylindrical shape with a bottom into which the case 1 can be fitted, and has a protrusion 6 on its mouth edge 5 that protrudes outward.
are intermittently protruded in the circumferential direction, and their positions are aligned with the protrusions 3 of the case 1. In addition, a notch 6' is provided in a part of the end edge portion of these projecting edges 6 so as to be able to engage with the projection 3'. The case guard 4 is provided with several elongated windows 7 in its axial direction, and a strip 10 is formed between two notches 8 and 9 cut out from the mouth edge 5 parallel to the axis, A stopper 11 is engaged with this strip 10. The mode is as follows.
That is, as shown in FIG. 6, the stopper 11 is provided with a receiving groove 12 into which the strip 10 is inserted, and an S-shaped spring 13 is compressed between the bottom of the receiving groove 12 and the edge of the strip 10. It is assumed that the stopper 11 is inserted into the receiving groove 12, so that the stopper 11 can be displaced downward in FIG. 6 while compressing the S-shaped spring 13.

7 and 8 show the main body 14, and inside thereof there are formed a mounting part 15 for the equipment housed in the case 1 and a fluid passage 16, but these are not directly related to this invention. Explanation will be omitted. However, it must be noted that the fact that the fluid passage 16 is formed within the main body 14 means that internal pressure may remain in the main body 14 and the case 1 coupled to the main body 14. be. At the downward opening edge 17 of the main body 14, engaging edges 19 of appropriate width and length are provided intermittently protruding in the circumferential direction on the inner circumferential wall 18, and these engaging edges 19
A recess 20 is formed between them. Also, a part of each engaging edge 19 has a protrusion 3' of the case 1.
A notch 19' is provided into which the holder is inserted.

In the above structure, the case 1 and the mouth edges 2 and 5 of the case guard 4 placed over the case 1 are pushed into the opening edge 17 of the main body 14. In this case, the case guard 4 is inserted into the protrusion 3 of the case 1.
When the projecting edge 6 is aligned, the protrusion 3' is engaged with the notch 6'.

The protrusion 3 and the protrusion 6 are aligned with the recess 20 of the main body 14, the mouth edges 2 and 5 of the case 1 and the case guard 4 are fitted into the main body 14, and the case 1 is pushed in until it touches the main body 14. At this time, the stopper 11 is pushed down by the engagement edge 19 of the main body 14, and the S-shaped spring 13 inserted therein is compressed and a pushing force is applied. When the case 1 and the case guard 4 are rotated to the left or right together, and the stopper 11 reaches the recess 20 of the main body 14, it is pushed up into the recess 20 by the action of the S-shaped spring, and relative displacement in the circumferential direction is prevented. In the above state, the projecting edge 6 of the case guard 4 and the projecting strip 3 of the case 1 fit into the engaging edge 19 of the main body 14 and are connected to each other.

In a situation where fluid flows through the fluid passage 16 in the main body 14, the main body 14 and the case 1
When internal pressure exists in the case 1, the case body 14
The projection 3' of the case 1 is completely fitted into the notch 19' of the main body 14, and in this state, the stopper 11 is pushed against the S-shaped spring 13. Even if the case 1 and the case guard 4 are pushed down, the case 1 and the case guard 4 cannot be rotated relative to the main body 14. Furthermore, as mentioned above, the main body 1
Even if displacement occurs in the axial direction between the main body 14 and the case 1, the side seal type O-ring 21 fitted in the outer circumferential groove 2' of the mouth edge 2 of the case 1 will keep the body 14 and the case 1 connected. The sealing property between them is not impaired.

In the above situation, from the main body 14 to the case 1
When it becomes necessary to remove the case guard 4, first push down the stopper 11 against the force of the S-shaped spring 13 to remove the case 1 and the case guard 4 from the main body 1.
4 in the circumferential direction, but if pressure remains inside the main body 14 and the case 1, the protrusion 3' will enter the notch 19' as described above. , the case 1 and the case guard 4 cannot be rotated in the circumferential direction with respect to the main body 14. That is, only when the case 1 and the case guard 4 are pushed into the main body 14 against the internal pressure, the protrusion 3' escapes from the notch 19'.
Furthermore, by pushing down the stopper 11 against the S-shaped spring 13, it is possible to displace the main body 14, the case 1, and the case guard 4 in the circumferential direction, and the protrusion 3 of the case 1 and the case guard 4 can be moved. When the projecting edge 6 is disengaged from the engaging edge 19 of the main body 14, mutual separation becomes possible. In this way, when the case 1 and the main body 14 are separated from each other when internal pressure remains, the separation work is performed while applying a force that counteracts the internal pressure, so the safety of the work is ensured. .

The case 1 is generally a filter or a lubricator and is made of a non-metallic material. In this case, the case guard 4 serves as a major factor as a protective cover, but when the case 1 is made of metal, However, it is desirable to adopt the mechanism of this invention in consideration of the usability effect of allowing safe and simple attachment and detachment.

[Brief explanation of the drawing]

Figure 1 is an elevational view of the case, half of which is shown in cross section, Figure 2 is a plan view of the case, Figure 3 is a sectional view taken along the - line in Figure 2, and Figure 4 is a case guard. Figure 5 is an elevation view of the main part of the
The figure is a sectional view taken along the - line of Fig. 4, Fig. 7 is a sectional view of the main body, Fig. 8 is a bottom view thereof, Fig. 9 is an elevational view of the assembled state, and Fig. 10 is a - of Fig. 9. It is a sectional view along a line. In addition, in the figure, 1... Case, 2... Mouth edge, 3... Projection, 3'... Protrusion, 4... Case guard, 5... Mouth edge, 6... Projection, 8, 9. ... cut, 10 ... strip, 11 ... stopper, 12
...Reception groove, 13...S-shaped spring, 14...Body, 1
9... Engaging edge, 19'... Notch.

Claims (1)

[Scope of utility model registration request] A case guard having a circumferentially discontinuous protrusion formed on the mouth edge is covered with a case guard having a protrusion discontinuously discontinuous in the circumferential direction on the mouth edge, and these cases and case guards are discontinuously discontinued in the circumferential direction on the inner circumferential wall. By fitting the body with an engaging edge formed thereon and rotating it in the circumferential direction, these protrusions and edges are fitted into and engaged with the engaging edge, and at this time, the mouth edge of the case guard A strip is formed between two notches parallel to the axis of the case guard, and a stopper having a receiving groove that is fitted into the strip and a spring inserted into the receiving groove is placed on the lower end of the case guard. The spring is compressed and displaceably engaged toward the main body, and the stopper is pushed up by the action of the spring into the recess on the side surface of the engaging edge of the main body. A case attachment mechanism configured to prevent displacement of the case.