JPS5841377Y2 - Rotating body shaft stopper - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a plastic shaft stopper used as a rotating shaft for two members that rotate or swing relative to each other and for connecting the two members.

For example, the case shown in Fig. 1 is a plastic case that can be placed on a dining table, kitchen, tea room, etc. to store foodstuffs, seasonings, household medicines, baby supplies, etc. is attached to the side wall of the case 2 so as to be rotatable around a fulcrum 3.

Conventionally, in order to attach this door 1 to the case 2, as shown in FIG. The shaft 5 was inserted into a shaft hole (not shown) drilled in the side wall while being pressed toward the side.

With this method of fixing the shaft, if the product was dropped or otherwise subjected to impact during transportation, the door arm would bend inward, causing the door shaft 5 to fall out of the shaft hole, sometimes resulting in damage to the door. .

As a countermeasure, you can widen the width of your arms to reduce bending,
In order to increase the bending strength of the arms, it was considered to provide a lip or insert a cardboard patch between both arms, but the materials and auxiliary material costs would be high, and depending on the position of the lip, it would be difficult to release the mold. Due to the above problems, it was not a definitive solution.

Also, as shown in Fig. 4, there is a case where a boss 6 for a tapping screw is provided on the inner wall of the main body 2, and the door arm 4 is fastened with a tapping screw 7 from the inside, but if the case main body is small in size, it is difficult to operate the screwdriver. It is difficult and there are problems with the work.

The one shown in FIG. 5 has a shaft 8 protruding from the inner wall of the main body 2.
This is a shaft stopper with a protrusion 9 glued to the tip of the door to prevent it from falling off, but since the protrusion 9 is glued after the door is inserted into the shaft, the adhesive may flow and stain the door or the case of the main body. The disadvantage is that the cost is high due to the adhesive work.

The one shown in FIG. 6 uses a male screw 10 and a female screw 11 made of plastic as the shaft of the door 1, and the door 1 is attached by tightening the male screw to the female screw, but it has the disadvantage of being expensive.

Figure 7 shows the snap ring 1 after installing the door 1 on the shaft 12.
3 prevents the door from falling off, but the snap ring is cumbersome to work with.

This invention aims to solve the problem of the conventional shaft stopper for rotating bodies, and uses plastic male and female members that have a head and legs. The leg of the female member is cylindrical and has an engagement portion on its inner diameter surface, and the leg of the male member is inserted into the leg of the female member, and the engagement protrusion is inserted into the leg of the female member. This invention relates to a plastic shaft stopper that is adapted to be engaged with the parts.

Here, the term cylindrical is a general term for those that have a cylindrical or rectangular shape, those that have slits in the axial direction, those that have a drum-shaped outer diameter, and generally those that have a hollow hole inside. It is something to do.

Embodiments of this invention will be described below with reference to the drawings.

In the embodiment shown in FIG. 8, the 12-port female member 21 is composed of a head 22 and a leg 23 projecting vertically from the head.

The head is circular, but you can choose any other shape such as a square or a chrysanthemum.

The leg portion 23 has a cylindrical shape and may be cylindrical or rectangular, and a plurality of axial cuts 24, that is, slits are provided at the tip thereof.

Although four incisions 24 are provided, two incisions may be provided.

The outer periphery of the part where this notch is provided is bulged into a spherical shape, and the inner diameter surface of this part has an engaging part 25 that is recessed in a spherical shape.
is provided.

FIG. 8C shows a male member 26 with a head 27 similar to the head 22 of the female member, and legs 28 projecting vertically from the head 27.
The tip of the leg 28 is spherical, and the axis X-
Engagement protrusion 2 protruding in the outer radial direction, that is, in the radial direction with respect to X
9 is formed.

Note that the radius of the engagement protrusion 290 is approximately equal to the radius of the engagement portion 25 of the female member.

As shown in FIG. 82, the legs 23 of the female member 21 are inserted through the shaft hole of the case body 2 into the shaft hole of the arm 4 of the door, and then the legs 28 of the male member 26 are inserted into the cylindrical shape of the female member. When the male member is pressed into the leg portion 23 with a fingertip, the retaining protrusion 29 of the male member engages with the engaging portion 25 of the female member, and the male member 26 and the female member 21 are connected.

The male and female members are molded from appropriate plastics such as polyacetal resin, polycarbonate resin, nylon, etc., taking into consideration strength, durability, elasticity, dimensional accuracy, ease of attachment and removal, etc., or made from a general-purpose resin that satisfies the above physical properties. Good too.

The distance between the two heads 22° and 27 when the male and female members are engaged should be determined by considering the total thickness of the wall of the case and the arm of the door, or the combined dimension of the case wall and door arm when using Perakin. The dimensions are such that it has a moderate amount of friction and no play.

The embodiment shown in FIG. 9 is a modification of the one shown in FIG. 8, in which a protrusion 30 having an outer diameter slightly smaller than the shaft hole of the arm 4 of the door is provided on the outer surface of the tip of the leg 23 of the female member 21. However, when the leg part 28 of the male member is inserted into the leg part 23 of the female member, the engaging protrusion 29 of the male member pushes and spreads the female member in the outer diameter direction, so that the protrusion 30 of the door arm 4 is inserted into the leg part 23 of the female member. Engages with the shaft hole.

In the case of the embodiment shown in FIG. 8, the head 27 of the male member receives the thrust force when the door moves due to impact and prevents the door from coming off, but if an excessive thrust force is applied, the male member and the female There is also a risk that a force exceeding the engagement force of the members may act on the head 27 of the male member, causing the male member to fall out of the female member.

However, in the embodiment shown in FIG. 9, the male member 27 is attached to the female member 21.
When the door is inserted, the diameter of the shaft hole of the arm is smaller than the diameter of the protrusion 30 of the female member, so the load in the thrust direction by the door arm 4 is applied to the protrusion 30 of the female member. The load of the door is not applied to the head, and the male member is prevented from falling off.

In the embodiment shown in FIG. 10, the cylindrical leg portion 32 of the female member 31
An engaging portion 33 that protrudes inward is provided on the inner surface of the tip of the male member 34, and the tip portion 36 of the leg portion 35 of the male member 34 has a truncated conical shape, unlike the spherical shape shown in FIGS. 8 and 9. As a result, insertion into the female member is made easier, and a step portion 38 having an engaging protrusion 37 formed at the rear engages with the engaging portion 33 of the female member to generate a larger engaging force.

The predetermined positioning of the male member 34 is performed such that the tip of the engaging portion 33 of the female member is in contact with the inner wall of the head of the male member 34, as shown in FIG.

By extending the outer diameter surface of the leg portion 32 of the female member 31 as shown in the figure, it is possible to prevent the female member from expanding outward when the mold is released.

The embodiment shown in FIG. 11 is used where a large load is applied to the shaft, and in this case it is necessary to increase the diameter of the shaft of the leg.

However, if the leg of the male member is made of solid material as shown in Figures 8, 9, and 10, the diameter of the engaging protrusion increases, causing sink marks and warpage, resulting in poor dimensions. There is a risk of causing defects.

Therefore, the leg portion 43 of the male member 42 is made cylindrical, and the engaging protrusion 44 is made thin so that it can be sufficiently cooled during molding.

The rest is the same as the embodiment shown in FIG.

In the embodiment shown in FIG. 12, the legs 52 of the female member 51 are cylindrical, as in the previously described embodiments, but the cylindrical portions of the legs extend into the head 53. An engaging portion 54 of the female member 51 is provided in a protruding manner on the inner diameter surface of that portion.

Also, instead of providing a notch in the leg portion of the female member 51, a notch 57 is made in the leg portion 56 of the male member 55, as shown in FIG.
An engaging protrusion 5 protruding from the outer diameter surface of the distal end of the leg portion 56 is provided.
8 is inserted through the engaging portion 54 of the female member 54 to facilitate engagement.

If the engaging portion of the female member is protruded from the inner diameter surface of the tip of the leg as in the embodiment shown in FIGS. 10 and 11, when the female member is actually molded and released from the mold, Due to the inwardly protruding engaging part, the legs may expand outward, causing defects, or the peaks of the engaging part may collapse, resulting in a decrease in dimensional accuracy and a decrease in the engagement force. However, if the female member is shaped as shown in FIG. 12, it has the advantage that it can be molded using a mold with only a core and a cavity.

The embodiment shown in FIG. 13 is substantially similar to that of FIG. 12, but the legs 62 of the female member 61 are shortened, and the male member 63
In this example, only the tip of the leg 64 is inserted into and engaged with the leg 62 as shown in C.

However, since the heads 65 and 66 of both the female and male members have a recess 67 on the inner surface of the periphery and a bendable flange 68 with a curved periphery, it is difficult to insert and fit the female and male members. Even if the distance between the two heads after assembly is a little narrower than the wall thickness of the case body and the door arm, the elasticity of the flange can absorb variations in the dimensions of the molded product, preventing play in the axial direction of the door. It can be prevented.

It is also possible to provide an appropriate amount of frictional resistance between the door and the case body.

The collar portion 68 that produces this elasticity is not limited to the embodiment shown in FIG. 13, but can be applied to all embodiments.

As shown in the above embodiments, the shaft stopper of this invention consists of a female member and a male member each having a head and legs, and the legs of the male member are elastically deformed into the legs of a cylindrical female member. As it is assembled by inserting the male member using the holder and engaging the engaging protrusion of the male member with the engaging part of the female member, it can be assembled by simply pressing with light pressure with your fingertips, and it can be used even in narrow spaces such as the inside of a case. Easy to work anywhere.

Furthermore, since it is molded from plastic, the manufacturing cost is low, and the color can be selected arbitrarily, so even if the head is exposed outside the case body, the appearance will not be affected.

In the embodiment shown in FIG. 14, an axial cut or a groove 73 on the inner diameter surface is provided from the open end side in the cylindrical leg part 72 of the female member 71, and the end part 74 on the head side is provided in the circumferential direction. The bent end is used as the engagement part of the female member, and the male member 75 is bent.
An engaging protrusion 77 that can be engaged with the notch 73 or groove is provided on the leg portion 76 of the holder.

In this case, align the retaining protrusion 77 with the notch 73, insert the leg part 76 of the male member into the leg part 72 of the female member, push it in with your fingertips, and insert the engaging protrusion 77 into the bent or inclined end γ4 at the back of the notch. When the male member approaches the bent or inclined cut, the male member rotates only by the pushing force of the fingertip and engages with the predetermined engaging portion of the end portion 74.

In this case, it would be more effective if the predetermined engagement portion of the end portion 74 is provided with a return prevention notch to prevent the male member from easily coming off from the female member, and an elastic collar portion 78 is provided on the head. A strong engagement force is generated.

This embodiment is slightly different from the above-mentioned embodiments in which it is simply pushed in in the axial direction, but it is the same in that it can be easily operated with a fingertip.

As in the embodiment shown in FIG. 15, the head 8 of the female member 81
2 may be adhered to or integrally formed with a rotating member, for example, the case body 2 or the door, and the leg portions 85 of the male member 84 may be inserted into the leg portions 83 of the female member to engage the two.

The above explanation was given using an example of a shaft stopper used for the rotating part of a plastic organizer case, but the rotating support for a flower pot is generally a thin-walled member that rotates or swings relative to each other, such as the rotating shaft of a dish. It can be widely used as a shaft stopper for rotating parts.

[Brief explanation of the drawing]

Figure 1 is a perspective view of an organizing case in which the shaft stopper of this invention is used, Figure 2 is a perspective view of the door of the case in Figure 1, and Figure 3 is a cross section of the door in Figure 2 passing through the rotation axis. Figure, Figure 4, Figure 5,
Figures 6 and 7 are both cross-sectional views showing the rotating shaft of a conventional rotating body, and Figure 8 is an embodiment of this invention, in which A is a vertical side view of the female member, and the opening is a view of A from the right side. 9 is a sectional view corresponding to FIG. 8 2 of another embodiment, FIG. 10 is a front view of the male member; 11 shows other embodiments, A is a side view of the female member, the mouth is a side view of the male member, C is a cross-sectional view showing the engaged state, and FIG. 12 shows still another embodiment. is a side view of the female member, mouth is a front view of the male member, C is a side view of the male member,
2 is a cross-sectional view showing the engaged state, FIG. The figures show still another embodiment, A is a side view of the female member, the mouth is a front view of the same, C is a front view of the male member, 2 is a side view of the male member, and FIG. 15 is a side view of the male member. FIG. 21.31.41.51.61.7L81... Female member, 22, 53, 65, 82... Head of female member,
23.32, 52, 62, 72, 83... Leg portion of female member, 25, 33, 54, 74... Engagement portion of female member, 2
6.34, 42, 55, 63, 75, 84... Male member, 27... Head of male member, 28, 35, 43° 56.
64,76.85...Male member leg, X-X...Axis, 29 37.44. 58 7γ... Engagement protrusion of male member.

Claims (1)

[Scope of utility model registration request] It consists of a male member and a female member made of plastic each having a head and a leg extending perpendicularly from the head, and the leg of the male member has an engagement member that protrudes in the outer radial direction with respect to the axis of the leg. The legs of the female member are provided with projections, the legs of the female member are cylindrical, the engagement portions are provided on the inner diameter surface of the female member, the legs of the male member are inserted into the legs of the female member, and the engagement protrusions of the male member are inserted into the legs of the female member. A shaft stopper for a rotating body that can be engaged with the engaging part of the rotating body.