JPH047350Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention relates to a hinge that rotates by a shaft provided in the vertical direction and has a structure that prevents the shaft from falling off. be.

<Prior Art> In the past, there has been a hinge with a structure to prevent the shaft from falling off, such as the one shown in FIG. 1, for example.

That is, this hinge 1 includes an upper blade 3 integrally formed with a shaft insertion hole 2, a lower blade 5 having substantially the same shape as the upper blade 3 and having a shaft insertion hole 4, and both shaft insertion holes 2, 3. and a shaft 6 into which the upper half and lower half are rotatably inserted,
By press-fitting a ring-shaped collar 7 into the center portion of the shaft 6, the collar 7 is latched onto the upper peripheral surface 4a of the shaft insertion hole 4 in the lower blade 5, thereby preventing the shaft 6 from falling off. .

A plurality of mounting holes 3a and 5a for hinge mounting screws (not shown) are formed in the side surfaces of each of the blades 3 and 5, respectively.

However, in the case of the conventional hinge 1 as described above, it is time-consuming to press-fit the collar 7 to the center of the shaft 6 to prevent the shaft 6 from falling off, and it is difficult to press the collar 7 into the center of the shaft 6 without deforming the collar 7. There were problems such as the need to control the dimensional accuracy of the collar 7 in order to firmly press fit it.

〈Purpose of the invention〉 This invention was made to solve the problems of the conventional methods as described above.It is a hinge that can prevent the shaft from falling off without having to provide a collar on the shaft as in the past. is intended to provide.

<Structure of the invention> The structure of the hinge according to this invention is that in a hinge formed by fitting a shaft communicating with a shaft insertion hole provided in an upper blade and a shaft insertion hole provided in a lower blade, A protrusion is formed in the shaft insertion hole over the entire length of the shaft insertion hole, and an engagement groove that engages with the protrusion is provided in the longitudinal direction from the middle to the lower end of the shaft. It is a feature.

<Example> This invention will be explained below based on the drawings.

FIGS. 2 and 3 are diagrams illustrating an embodiment of this invention.

That is, the hinge 11 has a cylindrical shaft insertion hole 12 formed integrally with the upper blade 1 as shown in FIG.
3, a lower blade 15 having substantially the same shape as the upper blade 13 and having a shaft insertion hole 14, and a shaft 16 that fits vertically into the shaft insertion holes 12 and 14.

The upper blade 13 and the lower blade 15 are manufactured by extrusion molding and cutting them into appropriate lengths, and the shaft insertion hole 1 of the lower blade 15 is
On the inner surface of the shaft insertion hole 14, a protruding portion 14b integrally formed during extrusion molding is provided over the entire length of the shaft insertion hole 14.

The shaft 16 is formed by die casting or the like, which is suitable for mass production, and has a tapered upper end 16a, and the lower half has a lower part, as shown in FIG. When the blade 15 is inserted into the shaft insertion hole 14, an engagement groove 16b is formed in the longitudinal direction of the shaft, which engages with the protrusion 14b and has approximately the same length as the insertion length into the shaft insertion hole 14. It has been done.

Note that the shaft 16 has flat sides 16c, 16c corresponding to the dividing surfaces of the mold used for die-casting, and even if some burrs occur at the position of the dividing surfaces during molding, these burrs will reduce the shaft diameter. It is set so that it does not exceed the limit.

Further, a plurality of mounting holes 13a and 15a for hinge mounting screws (not shown) are formed in the side surfaces of the upper blade 13 and the lower blade 15, respectively.

When assembling the hinge 11 configured as described above, the shaft 16 is inserted from above the shaft insertion hole 14 of the lower blade 15 while engaging the protrusion 14b and the engagement groove 16b. Engagement groove 1
Since the upper end portion 16d of the shaft 6b is engaged with the upper end surface 14a of the protruding portion 14b, the shaft 16 will not fall off.

Further, after a resin washer 17 is interposed on the shaft 16, the shaft insertion hole 12 of the upper blade 13 is rotatably inserted into the upper half of the shaft 16. Since the upper end 16a of the shaft 16 is tapered, for example, if the upper blade 13 is fixed in advance to a rotating body such as a gate, the work of attaching a large or heavy rotating body to the shaft 16 is easy. It can be done easily.

In addition, in the above embodiment, the locking groove portion 16b
Although the length of the engagement groove 16b is set to the lower half of the shaft 16, the length of the engagement groove 16b varies depending on the insertion depth of the lower blade 15 into the shaft insertion hole 14 and the length of the shaft. It is formed over a direction, and may not be exactly half of the whole.

Furthermore, in the above embodiment, the protruding portion 14b
Although the configuration includes a pair of engagement groove portions 16b,
A plurality of these combinations or the engaging groove portion 16b
It is also possible to form only one at a plurality of locations.

Further, as explained in the above embodiment, the upper blade 13 and the lower blade 15 are formed by extrusion molding, and the shaft 16 is die-cast molded, and a component that prevents the shaft 16 from falling off during molding is provided. Because they are formed in one piece, there is no need to perform additional processing to prevent them from falling out, and each blade formed by extrusion is particularly sturdy compared to blades in which the shaft insertion hole is formed by winding, etc. It has other advantages such as stable quality.

<Effects of the invention> As explained above, according to the hinge of this invention, the hinge is formed by fitting a shaft that communicates with the shaft insertion hole provided in the upper blade and the shaft insertion hole provided in the lower blade. In this case, a protrusion is formed in the shaft insertion hole of the lower blade over the entire length of the shaft insertion hole, and a protrusion that engages with the protrusion in the longitudinal direction from the middle to the lower end of the shaft is formed. Because it has a structure with a matching groove, there is no need for the conventional collar to prevent it from falling off.
The structure can be simplified by reducing the number of parts, and it is extremely easy to assemble. Moreover, it is easy to manufacture because it allows integral extrusion molding of the ridges and blades to prevent them from falling off. It has the advantage of being able to obtain inexpensive hinges.

[Brief explanation of drawings]

Fig. 1 is an exploded perspective view illustrating a conventional hinge with a structure to prevent the shaft from falling off, Fig. 2 is an exploded perspective view illustrating an embodiment of the hinge of this invention, and Fig. 3 is the same as Fig. 2. It is a horizontal cross-sectional view of the lower blade explaining the state after assembly of the shown hinge. Code, 11...Hinge, 12...Shaft insertion hole, 13
...Upper blade, 14...Shaft insertion hole, 14b...Protrusion, 15...Lower blade, 16...Shaft, 16b...
...Engagement groove.

Claims (1)

[Scope of utility model registration request] In a hinge formed by fitting a shaft that communicates with a shaft insertion hole provided in an upper blade and a shaft insertion hole provided in a lower blade, a shaft is inserted into the shaft insertion hole of the lower blade over the entire length of the shaft insertion hole. What is claimed is: 1. A hinge, characterized in that a protrusion is formed, and an engagement groove is provided that extends in the longitudinal direction from the middle of the shaft to the lower end and engages with the protrusion.