JPH0714685U - Fixed structure of parts - Google Patents

Abstract

(57) [Summary] [Purpose] To provide a component fixing structure that can reliably prevent loosening of a fixing screw even with a component mounting portion made of non-adhesive resin. [Structure] In a component fixing structure for attaching a component to a fixing member 3 using a fixing screw 1 penetrating a mounting hole 5 of a resin component mounting portion 2, the surface of the component mounting portion on which the fixing screw 1 is seated is mounted. A fixing structure for a component in which an adhesive groove 7 is formed, and the adhesive 6 is applied from the adhesive groove 7 to the head 1b of the fixing screw 1 to prevent the fixing screw 1 from loosening.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a fixing structure for electric parts and the like, and more particularly, to an improvement in a structure for fixing a resin component mounting portion to a fixing member using a fixing screw.

[0002]

[Prior art]

 As is well known, electric parts such as pulse motors and electromagnetic solenoids are fixed to a fixing member using a fixing screw, but when attaching electric parts that are subject to vibration or external force, adhesive is applied from the head of the fixing screw. It may be applied to part of the surface to prevent loosening of the fixing screws.

FIG. 3 shows a conventional fixing structure in which a resin component mounting portion 2A such as an electromagnetic solenoid is fixed to a fixing member 3A by using a fixing screw 1A showing a case of a tap screw. The fixing member 1A has a fixing screw 1A. A fixing hole 4A having a smaller diameter than the outer diameter of the screw portion 1a is formed. A mounting hole 5A having a diameter slightly larger than the outer diameter of the threaded portion 1a of the fixing screw 1A is formed on the surface of the component mounting portion 2A corresponding to the fixing hole 4A. After the fixing screw 1A to be inserted is tightened, the epoxy resin adhesive 6 is applied from the head portion 1b of the fixing screw 1A to the surface of the component mounting portion 2A.

Therefore, in such a conventional fixing structure, the fixing screw 1A is rotated by the adhesive force of the adhesive 6 adhered to the head 1b of the fixing screw 1A and the surface of the component mounting portion 2A, that is, the fixing screw 1A. Will be prevented from loosening.

[0005]

[Problems to be solved by the device]

 By the way, in this fixing structure using the adhesive 6, if the component mounting portion 2A is made of non-adhesive resin such as polyacetal resin, for example, even if the adhesive 6 is applied, the fixing screw by the adhesive 6 is fixed. Since the effect of preventing loosening of 1A cannot be expected, we have taken measures to prevent loosening of the fixing screw 1A by strengthening the tightening torque of the fixing screw 1A and managing the tightening torque sufficiently. However, such a tightening torque control measure not only complicates the inspection process of the tightened state of the fixing screw 1A, but also loosens the fixing screw 1A only by the frictional force between the fixing member 3A and the component mounting portion 2A. Since it is prevented, the current situation is that reliability as a loosening prevention measure is poor.

In view of the problem of the component mounting member made of the non-adhesive resin as described above, the object of the present invention is to secure the looseness of the fixing screw even in the component mounting portion of the non-adhesive resin. This is to obtain a fixed structure for parts that can be prevented.

[0007]

[Means for Solving the Problems]

 In order to achieve this object, the present invention provides a component fixing structure for mounting a component on a fixing member using a fixing screw penetrating a mounting hole of a resin component mounting portion, wherein the fixing screw is seated. We propose a structure for fixing parts that prevents loosening of the fixing screw by forming an adhesive groove on the surface of the mounting portion and applying the adhesive from the adhesive groove by hanging it on the head of the fixed screw. is there.

[0008]

【Example】

 Hereinafter, the embodiment of the present invention will be described in detail with reference to FIGS. FIG. 1 is a sectional view of a fixing structure according to the present invention, which corresponds to FIG. 3, and the corresponding parts in FIG. 3 are designated by the same reference numerals except the suffix “A”.

More specifically, in the illustrated embodiment, a resin component mounting portion 2 such as an electromagnetic solenoid is fixed to a fixing member 3 with a fixing screw 1 formed of a tap screw. The fixing member 3 has a fixing screw. A fixing hole 4 having a smaller diameter than the outer diameter of the threaded portion 1a is formed. Further, since a mounting hole 5 having a diameter slightly larger than the outer diameter of the screw portion 1a of the fixing screw 1 is formed on the surface of the component mounting portion 2 corresponding to the fixing hole 4, the mounting hole 5 As in the conventional case, the component mounting portion 2 is fixed to the fixing member 3 by screwing the screw portion 1a of the fixing screw 1 inserted from above into the fixing hole 4.

In the present invention, an adhesive groove 7 having a tip portion communicating with the mounting hole 5 is formed on a part of the surface of the component mounting portion 2 on which the head portion 1b of the fixing screw 1 is seated. The adhesive 6 can be applied from the head 1b of the fixing screw 1 to the portion of the fixing groove 1 that is hooked in the adhesive groove 7. The adhesive groove 7 does not necessarily need to be connected to the mounting hole 5, but in order to reliably release the internal air in the adhesive groove 7 when applying the adhesive, as shown in the figure, It is preferable that both ends are connected to the mounting hole 5 and the end surface of the component mounting portion 2. Further, the groove width of the adhesive groove 7 may be designed so that the shear strength after solidification filled in the adhesive groove 7 exceeds the loosening torque of the fixing screw 1.

Since the fixing structure according to the illustrated embodiment has the above-described structure, after the fixing screw 1 is inserted into the fixing hole 4 and the mounting hole 5 and tightened, the head 1b of the fixing screw 1 is applied with an adhesive. The adhesive 6 may be applied to the portion that extends inside the groove 7.

FIG. 1 shows a state after the adhesive 6 is applied, and the solidified adhesive 6 is adhered to the head portion 1 b of the fixing screw 1 and is filled in the adhesive groove 7. is there. Therefore, the fitting relationship between the filling portion 7a of the adhesive 6 and the adhesive groove 7 provides shear resistance against the loosening torque of the fixing screw 1, so that the component mounting portion 2 is made of non-adhesive resin. Regardless of whether or not it is possible to prevent the fixing screw 1 from loosening after tightening.

Therefore, the structure of the illustrated embodiment is an inexpensive fixing structure that does not require strengthening the tightening torque of the fixing screw or strict control of the tightening torque.

When the component mounting portion 2 is made of an adhesive resin, the adhesive force between the adhesive 6 and the component mounting portion 2 and the adhesive groove 7 are filled. The presence of the filled portion 6a of the adhesive 6 prevents the fixing screw 1 from loosening, resulting in a more firm structure for preventing loosening.

[0015]

[Effect of device]

 As is clear from the above description, according to the present invention, regardless of whether it is a non-adhesive resin or not, the adhesive groove is formed on the surface of the resin component mounting portion, Since the loosening can be surely prevented, it is possible to obtain an inexpensive fixing structure for parts that does not require tightening torque enhancement or strict control of the tightening torque.

[Brief description of drawings]

FIG. 1 is a sectional view of a fixing structure according to the present invention.

FIG. 2 is an exploded perspective view of the fixing structure.

FIG. 3 is a cross-sectional view of a conventional fixing structure.

[Explanation of symbols]

 1 Fixing screw 1b Head part 2 Component mounting part 3 Fixing member 5 Mounting hole 6 Adhesive 7 Adhesive groove

Claims (1)

[Scope of utility model registration request] 1. In a component fixing structure for mounting a component on a fixing member using a fixing screw penetrating a mounting hole of a resin component mounting portion, an adhesive is applied to a surface of the component mounting portion on which the fixing screw is seated. A fixing structure for a component, characterized in that a groove is formed, and the adhesive is applied from the same groove to the head of the fixing screw to prevent the fixing screw from loosening.