JPH057415Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field] The present invention relates to a door hinge that is easy to manufacture.

[Conventional technology]

FIGS. 5 and 7 show two examples of conventional door hinges in exploded perspective views.

The door hinge 50 shown in FIG. 5 consists of a mail plate 51 attached to the body side, a mail plate 52 attached to the door side, and a support shaft 53 rotatably connecting the two. The male plate 51 integrally includes a pair of spaced apart bearing portions 54 and 55 formed by curling a portion thereof, and the male plate 52 also includes a bearing portion 56 formed by curling a portion thereof. . And the bearing part 54
A bearing part 56 is inserted between and 55 to align the shaft centers, and a support shaft 53 having an integral flange part 53a is inserted from one side and the tip is caulked on the other side to assemble.

On the other hand, the door hinge 70 shown in FIG. 7 is basically the same as the door hinge 50 shown in FIG. These bearing parts 73,
74 and 75 are fixed to the male plate 71 and the male plate 72 by welding or the like, respectively, and the plates 71 and 72 are connected by a support shaft 53 similar to the door hinge 50.

[Problem that the invention attempts to solve]

However, the conventional door hinge described above has the following problems.

First, since the door hinge 50 is curled to form the bearing portion 54...
As shown in the A-line cross section), the inner peripheral side of the bearing portions 56 undergoes plastic deformation that swells outward in the axial direction. Therefore, after curling, it is necessary to mill the end surfaces of the bearing portions 54 to form a surface perpendicular to the axial direction. Moreover, the bearing part 54 is curled.
Since the inner circumferential surface of the... is deformed into a fold shape, it is difficult to form a perfect circle, and furthermore, the support shaft 53 is bent by caulking during assembly, resulting in deterioration of the overall assembly precision and quality.

On the other hand, the latter door hinge 70 has a single bearing part 7
3... are individually fixed to the female plate 71 and the male plate 72, the axial center of each bearing part 73... is likely to be misaligned, and as described above, there is a problem in that assembly accuracy and quality deteriorate. Further, there is a problem that the number of parts increases, such as a total of three bearing parts 73 being required.

[Means for solving problems]

The object of the present invention is to provide a door hinge that solves the problems that exist in the conventional technology described above, and is achieved by the door hinge H shown below.

That is, the door hinge H according to the present invention has at least one intermediate pipe 4 rotatably inserted through the shaft body 1 of the support shaft 3 which integrally has a large-diameter head 2 at one end, and the shaft body 1. An assembly unit formed by inserting the tip pipe 5 into the tip of the
The present invention is characterized in that it is composed of a male plate 6 which is fixed to the head part 2 and the tip pipe 5 by welding or the like, and a male plate 7 which is similarly fixed to the intermediate pipe 4.

[Effect]

Next, the operation of the present invention will be explained.

In the door hinge H according to the present invention, an intermediate pipe 4 is inserted into the middle part of the support shaft 3, and a tip pipe 5 is further inserted into the tip of the support shaft 3, so that the intermediate pipe 4 can freely rotate with respect to the support shaft 3. assembly unit
As can be configured.

On the other hand, the assembly unit As can be fixed to each plate 6 and 7 by welding or the like in this state. That is, the head 2 and the tip pipe 5 of the support shaft 3 are fixed to the male plate 6, and the intermediate pipe 4 is fixed to the male plate 7, respectively.

Therefore, the mail plate 7 is rotatably connected to the female plate 6.

〔Example〕

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

1 to 3 are perspective views of the door hinge according to the present invention at an assembly stage, and FIG. 4 is a plan view of the door hinge.

First, each component constituting the door hinge H according to the present invention will be explained.

Reference numeral 3 denotes a support shaft, which is composed of a shaft body portion 1 and a head portion 2 integrally formed at one end of the shaft body portion 1. The head 2 is the shaft body 1
Form into a cylindrical shape with a larger diameter. In addition, the shaft body part 1
It is desirable that the axial length of the pipe is selected to be the sum of the intermediate pipe 4 and the tip pipe 5, which will be described later. Furthermore, a serration joint portion 12 having an uneven shape is formed on the outer circumferential surface of the tip portion of the shaft body portion 1 .

4 is an intermediate pipe, which is formed into a cylindrical shape. The outer diameter of the intermediate pipe 4 is formed to be approximately the same as or smaller than the outer diameter of the head 2, and the inner diameter is selected to allow it to be rotatably inserted into the shaft body 1.

Reference numeral 5 denotes a tip pipe, which is formed into a cylindrical shape having approximately the same shape as the intermediate pipe 4. The outer diameter of the tip pipe 5 is formed to be the same as the outer diameter of the head 2, and a serration joint 13 that can be press-fitted into the serration joint 12 of the shaft body 1 is formed on the inner peripheral surface.

6 is a Himale plate, which can be formed by punching out a single plate. On the plate surface, a plurality of mounting holes 14, which can be riveted, for example, are bored on the body side, and the head 2 and the tip pipe 5 are
A linear edge 15 is provided on each circumferential surface of which can be fixed by welding or the like.

7 is a mail plate attached to the door side,
It can be formed in the same shape as the female plate 6. Note that the circumferential surface of the intermediate pipe 4 has a linear end side 16 that can be fixed by welding or the like. The male plate 7 and the male plate 6 can be used as common parts.

Next, a method for assembling the door hinge H according to the present invention will be explained step by step.

First, as shown in FIG. 1, the intermediate pipe 4 is inserted into the support shaft 3, and then the tip pipe 5 is inserted. As a result, the assembly unit As shown in FIG. 2 can be constructed. In this assembly unit As, the intermediate pipe 4 is rotatable relative to the shaft body 1, and the tip pipe 5 is press-fitted into the tip of the shaft body 1 and fixed by serration connection.

Next, as shown in Figure 3, assemble the assembly unit.
The male plate 6 and the male plate 7 are brought into contact along the axial direction so as to be 180° opposed to the circumferential surface of As, and welded at the locations indicated by the x marks in the figure. In other words, head 2 for Himale plate 6.
and the tip pipe 5, and the intermediate pipe 4 to the mail plate 7, respectively. This welding is desirably performed on the front and back surfaces of each plate 6, 7, as indicated by reference numerals 40 in FIG. This completes the assembly.

In this way, the door hinge H of the embodiment can omit one bearing part compared to the conventional door hinge, and since it is fixed to the female plate or mail plate after the spindle and the pipe are assembled, the center of the spindle is fixed. There will be no misalignment in the center of the pipe.

Although the embodiments have been described in detail above, the present invention is not limited to these embodiments.
For example, although one intermediate pipe is illustrated, an odd number of intermediate pipes may be used. In this case, they may be fixed alternately to the female plate or the male plate. Further, although the tip of the shaft body portion and the tip pipe are connected by serration, they may be simply press-fitted. The door hinge according to the present invention is suitable for application to a door hinge for a special vehicle, etc., but it can also be applied to any door hinge in other applications, and even to any application other than doors. Other changes may be made in the detailed configuration, shape, quantity, etc., without departing from the gist of the present invention.

[Effect of idea]

In this way, the door hinge according to the present invention has at least one intermediate pipe rotatably inserted through the shaft main body of the support shaft integrally having a large-diameter head at one end, and the tip An assembly unit made by inserting a pipe, a Himale plate that is fixed to the head and tip pipe,
Since it is equipped with a mail plate that is fixed to the intermediate pipe, the following effects can be obtained.

Since the assembly unit is made up of the spindle and pipe in advance, and then the female plate and mail plate are fixed, the axes of the spindle and the pipe always align in a straight line, improving assembly accuracy and quality. It is possible to improve and equalize the

Since the head of the spindle and the tip pipe inserted into the shaft body are fixed to the Himale plate, one collar (bearing part) is not required compared to conventional products, and the tip of the spindle does not need to be caulked. becomes. Therefore, by facilitating processing and reducing the number of parts, a significant reduction in manufacturing man-hours and costs can be achieved. Further, since the head and the tip pipe do not protrude in the vertical direction from the female plate and the male plate, the appearance can be improved and the size can be reduced.

[Brief explanation of the drawing]

Figures 1 to 3: A perspective view of the door hinge according to the present invention at the assembly stage, Figure 4: A plan view of the door hinge, Figure 5: An exploded perspective view of the conventional door hinge, Figure 6: Figure 5 FIG. 7 is an exploded perspective view of another conventional door hinge. In the drawings, H...door hinge, As...assembly unit, 1...shaft body, 2...head,
3... Support shaft, 4... Middle pipe, 5... Tip pipe, 6... Himale plate, 7... Mail plate.

Claims (1)

[Scope of utility model registration request] At least one intermediate pipe 4 is rotatably inserted into the shaft main body part 1 of the support shaft 3 which integrally has a large diameter head 2 at one end, and the shaft main body part 1
an assembly unit As formed by inserting a tip pipe 5 into the tip of the head 2 and a female plate 6 fixed to at least the head 2 and the tip pipe 5;
and a mail plate 7 fixed to at least one of the intermediate pipes 4.