JPH078331Y2 - Setting rubber and its mounting groove structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention relates to a setting rubber for mounting a frame main body to which a member such as a wiper motor is attached to a body side, and a mounting groove structure thereof.

[Problems to be Solved by Prior Art and Invention] Generally, when attaching a frame body of this kind to the body side using a setting rubber, a bolt shaft center set on the body side and an axis center of the frame body are May have to be installed in a tilted relationship. In this case, the axis of the arcuate cylindrical mounting groove for fitting the setting rubber formed at the tip of the mounting leg protruding from the frame body is formed to be inclined with respect to the axis of the frame body. By the way, when the frame body is formed by using a mating die that is butted in the axial direction, there is a groove surface hidden with respect to the axis of the frame body, and there is no choice but to stop there, as shown in FIG. With respect to the above-mentioned hidden portion, the mold is formed by projecting the mold-taking portions 3b and 4b from the both molds 3 and 4 so as to mesh with each other. Kasaruni Molding Department
When the 3b and 4b are meshed with each other, a draft taper must be provided between them, so a step is inevitably formed on the inner surface of the mounting groove, and smoothness is impaired.
Due to this step, it is difficult to mount the setting rubber in the mounting groove with the core accurately aligned, and the core becomes misaligned, which is one of the factors that hinder the mounting of the frame body. ing. Then, in order to avoid this, it is the actual situation that the stepped portion is cut, and there is a problem such as poor workability.

[Means for Solving the Problems] In view of the above circumstances, the present invention was devised with the object of providing a setting rubber and its mounting groove structure capable of eliminating these drawbacks. The mounting rubber is fitted in the arcuate cylindrical mounting groove formed at the tip of the mounting leg extending from the frame body and mounted on the body side, and the axis direction is inclined with respect to the axis center of the frame body. The mounting groove is formed in a frusto-conical shape around the tilt axis so that the inner circumferential surface of the groove does not hide the surface concealed from the frame main body side when viewed from one direction, while mounting the setting rubber. The fitting part to the groove is characterized by being frustoconical in conformity with the inner peripheral surface of the groove.

Further, according to the present invention, even if the mounting groove is inclined, the present invention prevents a step portion from being formed on the inner peripheral surface of the groove due to the draft taper.

[Embodiment] Next, an embodiment of the present invention will be described with reference to the drawings. In the drawings, reference numeral 1 denotes a frame main body to which a wiper motor is assembled, and a plurality of (for convenience, three in the embodiment) mounting legs 2 are respectively extended from the frame main body 1 toward the centrifugal direction. A mounting groove 2a in the shape of a circular arc is formed at the tip of the leg 2 in a state of being inclined with respect to the frame body 1.

The frame main body 1 is integrally formed by using upper and lower mating dies 3 and 4, and the mounting groove 2a has a tapered shape in which a mounting surface side with a skeleton (vehicle body) is expanded into a truncated cone shape. The inner cylindrical surface is formed by an arcuate inner cylindrical surface, and the inner cylindrical surface of the groove is set so that there is no surface hidden with respect to the axis of the frame body 1 when viewed from the body side. A mold surface portion 4a corresponding to the inner cylindrical surface of the mounting groove 2a is formed in the lower mold 4 which is the body side.

Reference numeral 5 denotes a setting rubber. The collar 6 and the washer 7 are assembled to the setting rubber 5, but the washer 7 is so set that the claw portion 7a is immersed in the setting rubber 5 so as not to fall off from the setting rubber 5. Is configured to. The mounting groove fitting portion 5a of the setting rubber 5 also has a truncated cone shape corresponding to the tapered inner cylindrical surface of the mounting groove 2a.

In the embodiment of the present invention constructed as described above, when the frame body 1 is mounted on the body side, the setting rubber 5 is fitted into the mounting groove 2a of the mounting leg 2 so as to be elastically mounted. However, even if this mounting groove 2a is inclined with respect to the frame body 1, its inner cylindrical surface is
The mold surface portion 4a of the lower mold 4 is used to mold the entire mold.

That is, the mounting groove 2a has a frusto-conical shape centered on the inclined axis so that there is no part hidden with respect to the axial center of the frame body 1 when viewed from the body side.
It is possible to form all the mold surface portions 4a for molding the 2a. Therefore, although the mounting groove 2a inclined with respect to the frame body 1 is formed by a mold, a step on the inner peripheral surface of the groove caused by considering the draft taper as in the case where molds are fitted in the mounting groove portion as in the conventional case. Since there is no occurrence of a part, the cutting process of that part is not necessary at all,
Mounting groove with excellent smoothness in the as-cut state
You will be able to do 2a. Moreover, the setting rubber 5 also has a frustoconical shape corresponding to the frustoconical mounting groove 2a, so that there is no play.

The present invention is not limited to the above embodiment, and the mounting groove may be a frustoconical shape that is widened on the opposite side of the embodiment.

[Effects] In summary, since the present invention is configured as described above, the mounting groove has a truncated cone centered on the inclined axis so that there is no part hidden with respect to the axis of the frame body when viewed from one direction. As a result, it is possible to form all mold surface parts for molding the mounting groove in the mold on the side. Therefore, although a mounting groove having an axis inclined with respect to the axis of the frame body is formed as a mold, there is no stepped portion caused by considering the draft taper on the inner peripheral surface of the groove as in the conventional case. In other words, the step of cutting the stepped portion is not absolutely necessary, and the mounting groove having excellent smoothness can be formed in the state where the die is cut. Moreover, the setting rubber also has a frustoconical shape corresponding to the frustoconical mounting groove, so that no looseness occurs.

[Brief description of drawings]

The drawings show an embodiment of a setting rubber and its mounting groove structure according to the present invention. Fig. 1 is a front view of a frame body, Fig. 2 is a side view of the same, and Fig. 3 is a mounting groove portion. 4A and 4B are a plan view of the setting rubber, a front view of a half section thereof, and FIG. 5 is a sectional view of a conventional mounting groove portion. In the figure, 1 is a frame body, 2 is a mounting leg, 2a is a mounting groove, 3 and 4 are molds, and 5 is a setting rubber.

Claims (1)

[Scope of utility model registration request] Claim: What is claimed is: 1. A mounting rubber is fitted in a circular arc-shaped mounting groove formed at the tip of a mounting leg extending from the frame body, and the mounting rubber is mounted on the body side. The mounting groove that is inclined with respect to is formed in a frusto-conical shape around the tilt axis so that the inner circumferential surface of the groove does not have a surface hidden with respect to the axis of the frame body when viewed from one direction. A fitting rubber and a fitting groove structure thereof, wherein a fitting portion of the setting rubber into the fitting groove has a frustoconical shape in conformity with the inner peripheral surface of the groove.