JP2010194441A - Coating method, jig for coating and ultrasonic sensor - Google Patents

Abstract

An object of the present invention is to coat the front end surface of a body part without increasing the number of members of the body and preventing the paint from adhering to a rubber part in the assembled state of the body.
An ultrasonic sensor 1 serving as a cylinder includes a sensor unit 2 including a rubber part 21 and an ultrasonic microphone 22 serving as a body part (hereinafter referred to as a microphone 22). The rubber part 21 is made of an elastic material and is formed in a cylindrical shape whose front end is open, and the microphone 22 has a wave transmitting / receiving surface 22a on the front end face. Sensor part 2
The transmission / reception surface 22a and the peripheral surface 21b are substantially flush with each other, and the rubber portion 21 is extrapolated to the microphone 22. The painting jig 7 includes a main body portion 7a and a locking piece 7b. An insertion hole 8 having a shape equal to the outer shape of the microphone 22 is provided through the main body portion 7a. The painting jig 7 is detachably attached to the ultrasonic sensor 1 by the locking piece 7b by inserting the microphone 22 through the insertion hole 8 against the elastic restoring force of the rubber portion 21. The wave transmitting / receiving surface 22a is maintained while the peripheral surface 21b and the wave transmitting / receiving surface 22a are not substantially flush with each other.
Paint.
[Selection] Figure 1

Description

The present invention relates to a method for coating an object to be coated, a jig for coating used in the coating method, and an ultrasonic sensor coated by the coating method.

Conventionally, various ultrasonic waves that are installed in a vehicle bumper and the like, intermittently transmit ultrasonic waves at a predetermined frequency, and detect obstacles around the vehicle by receiving reflected waves from the obstacles. A sensor is provided.

An example of this type of ultrasonic sensor is shown in FIG. The ultrasonic sensor 1 includes a sensor unit 2 that transmits / receives ultrasonic waves, a controller unit 3 that controls the operation of the sensor unit 2, a housing unit 4, and a cover unit 11. The sensor unit 2 has both front and rear end portions (left and right end portions in FIG. 5) opened by an elastic material, and a flange 21a is formed at the opening peripheral portion of the front end portion.
The rubber part 21 is formed in a cylindrical shape having a cylindrical shape, and the ultrasonic microphone 22 is formed in a cylindrical shape and has a transmission / reception surface 22a for transmitting and receiving ultrasonic waves on the front end surface (left end surface in FIG. 5). . The sensor unit 2 includes a transmission / reception surface 22 a of the ultrasonic microphone 22 and a rubber unit 2.
The rubber part 21 is extrapolated to the ultrasonic microphone 22 so as to be substantially flush with the peripheral edge surface 21b of the one opening. On the inner bottom surface of the ultrasonic microphone 22,
A piezoelectric vibration element (not shown) is attached. By applying an AC voltage to the piezoelectric vibration element to vibrate the bottom of the vibration case 22b that surrounds the ultrasonic microphone 22, ultrasonic waves are radiated forward from the wave transmitting / receiving surface 22a.

The controller unit 3 is composed of various electronic circuits and is housed in the housing unit 4. The above-mentioned various electronic circuits are, for example, a drive circuit that generates an electrical signal for generating ultrasonic waves and transmits it to a piezoelectric vibrating element through a connection line (not shown), or a piezoelectric vibration when receiving a reflected wave. It is an amplifier circuit that amplifies an electric signal transmitted from a device through a connection line.

The housing portion 4 is formed of a synthetic resin material in a cylindrical shape, and a cylindrical portion 4a that is open at both front and rear ends, and a body portion 4b that is formed in a hollow rectangular parallelepiped shape in the front-rear direction (left-right direction in FIG. 5)
Are formed in a substantially rectangular parallelepiped shape as a whole. And the sensor part 2 is supported so that the transmission / reception surface 22a may face forward, and it may protrude from the cylindrical part 4a front end part, and the controller part 3 is accommodated in the trunk | drum 4b. Further, an insertion portion (not shown) penetrating in the front-rear direction is provided at the front end portion of the body portion 4b. The insertion portion includes the piezoelectric vibrator of the ultrasonic microphone 22 and the controller portion 3 described above. A connection line (not shown) for electrically connecting the drive circuit and the amplifier circuit is inserted.

The cover part 11 is formed in a cylindrical shape whose rear end part (right end part in FIG. 5) is opened by a synthetic resin material, and further, an insertion hole penetrating in the front-rear direction is provided in the front end part. However, the insertion hole has a dimension substantially equal to the outer diameter of the rubber portion 21, and the peripheral edge of the insertion hole is formed in a tapered shape that expands rearward.

And the ultrasonic sensor 1 is attached as follows with respect to the hole 5a penetrated in the front-back direction (front and back direction) of the bumper 5 of a vehicle. At this time, the sensor part 2 and the housing part 4 have already been obtained.
Are integrated, and only the cover portion 11 is not fixed to them. First, the cover part 11 has a hole 5a from the front of the bumper 5 with the rear end of the opening facing backward.
Is inserted. Next, the sensor unit 2 and the housing unit 4 are inserted from the back side of the bumper 5 toward the opening of the cover unit 11 with the wave transmitting / receiving surface 22a facing forward. And the peripheral part 11b of the cover part 11 is the clearance gap 1 between the cylindrical part 4a of the housing part 4, and the trunk | drum 4b.
2 and is fixed at a position where the wave transmitting / receiving surface 22a, the peripheral surface 21b of the rubber portion 21 open, and the front end surface of the cover portion 11 are flush with each other. At this time, the surface of the flange 21 a of the rubber portion 21 is in contact with the peripheral edge portion of the insertion hole of the cover portion 11.

In addition, the ultrasonic sensor 1 is the cover part 11 until it attaches to the bumper 5 as mentioned above.
Is not fixed to the sensor unit 2 and the housing unit 4, for example, Patent Document 1
Like the ultrasonic sensor described in the above, the casing formed of a synthetic resin material is already integrated with the sensor body before the casing is attached to the bumper, and the sensor body integrated with the casing is placed in front of the bumper. Some can be inserted and installed.

Incidentally, the transmission / reception surface 22 a of the ultrasonic sensor 1 as described above is exposed from the surface of the bumper 5. Therefore, the wave transmitting / receiving surface 22a is painted with the same color as the surface of the bumper 5 in order to improve the appearance. However, when the sensor unit 2, the controller unit 3 and the housing unit 4 are assembled together and then sprayed with, for example, air spray toward the wave transmitting / receiving surface 22a, the paint is applied to the exposed peripheral surface 21b of the rubber unit 21. Will stick.
Since the rubber part 21 is formed of an elastic material that is not easily associated with the paint, if the paint adheres to the peripheral surface 21b of the rubber part 21, it adheres to the peripheral surface 21b when the rubber part 21 is elastically deformed by vibration. There was a risk that the paint would peel off and damage the beauty.

Therefore, conventionally, the ultrasonic microphone 22 is applied alone before the ultrasonic sensor 1 is assembled in the manufacturing process at the factory.

JP 2002-199482 A

However, since the conventional method of painting the ultrasonic sensor 1 is applied during the manufacturing process at the factory, it can only be attached to a bumper of the same color that has been determined in advance. There was a problem that after-coating was not possible.

Further, although different from the ultrasonic sensor 1 in that the casing is integrated with the sensor main body before being attached to the bumper, the ultrasonic sensor of Patent Document 1 has two problems with respect to the problem that the above-described post-coating cannot be performed. A rubber part having a structure that can be divided into two parts is provided. However, when this rubber part structure is employed in the rubber part 21 of the ultrasonic sensor 1, the cover part 11 is not fixed to the sensor part 2 and the housing part 4 until the cover part 11 is attached to the bumper 5. There was a risk that part of 21 would fall out. Further, there is a problem that the number of members of the ultrasonic sensor 1 is increased by dividing the rubber portion 21 into two.

The present invention has been made in view of the above reasons, and its purpose is to increase the number of members of the cylinder and prevent the adhesion of the paint to the rubber part while the cylinder is assembled. An object of the present invention is to provide a coating method, a coating jig, and an ultrasonic sensor capable of coating the front end surface.

In order to achieve the above object, the invention according to claim 1 is a coating method in which a cylindrical body, which is an object to be coated, is coated using a coating jig, and the cylindrical body is a cylinder whose front end is opened by an elastic material. The body portion is formed of a rubber portion formed in a shape and a body portion formed in a cylindrical shape, and the front end surface of the body portion and the peripheral edge surface of the rubber portion are substantially flush with the body portion. The rubber part is extrapolated and integrally assembled, and the painting jig is formed in a rectangular plate shape, and a main body part having an insertion hole having a shape equal to the outer shape of the body part is provided in the front-rear direction, An attachment means that is detachably attached to the cylinder when the barrel is inserted through the insertion hole, and the coating jig is attached to the cylinder, a rear surface of the main body, and a front end surface of the barrel Facing the elastic restoring force and pressing the peripheral surface of the rubber part backward against the insertion The body portion is inserted and attached to a hole, and the front end surface of the body portion is painted while maintaining a state where the peripheral surface of the rubber portion and the front end surface of the body portion are not substantially flush with each other. To do.

According to this invention, the peripheral surface of the rubber part is pressed backward against the elastic restoring force by making the painting jig face the cylindrical body with the rear surface of the main body part and the front end surface of the body part facing each other. The body portion is inserted through the insertion hole and attached, and the front end surface of the body portion is painted while the peripheral surface of the rubber portion and the front end surface of the body portion are not substantially flush with each other. . Therefore, it is possible to paint the front end surface of the barrel part without increasing the number of members of the cylinder body and preventing the paint from adhering to the rubber part in the assembled state of the cylinder body.

The invention of claim 2 is a coating jig used in the coating method of claim 1, wherein the main body is formed in a rectangular plate shape and has an insertion hole having a shape equal to the outer shape of the body portion extending in the front-rear direction. And an attachment means that is detachably attached to the cylindrical body when the body portion is inserted through the insertion hole.

According to the present invention, the insertion hole is configured such that the rear surface of the main body portion and the front end surface of the body portion are opposed to the cylindrical body and the peripheral surface of the rubber portion is pressed backward against the elastic restoring force. By attaching the body part through the body, it is possible to keep the peripheral surface of the rubber part and the front end surface of the body part not substantially flush with each other.

According to a third aspect of the present invention, in the second aspect of the present invention, the rear surface of the main body is provided with a groove that is recessed inward along the peripheral edge of the insertion hole, and the inner peripheral surface of the groove is It is characterized by being formed in a tapered shape that expands outward.

According to this invention, since the inner peripheral surface of the groove portion is formed in a tapered shape that expands outward, the rear surface of the main body portion and the front end surface of the trunk portion are opposed to each other, and the insertion hole When the body portion is inserted into the body portion, it is possible to prevent the insertion hole and the body portion from being displaced from each other in the axial center, thereby facilitating the attachment work to the cylindrical body.

According to a fourth aspect of the present invention, in the second or third aspect of the present invention, the front surface of the main body is provided with a recess that is recessed inward along the peripheral edge of the insertion hole, and the inner bottom surface of the recess. Is characterized by being formed in a tapered shape that expands inward.

According to this invention, since the inner bottom surface of the recess is formed in a tapered shape that expands inward, the paint is sprayed from the front surface side of the main body portion to the front end surface of the body portion. When this occurs, it is possible to prevent excess paint adhering to the recess from dripping toward the barrel.

The invention of claim 5 is an ultrasonic sensor which is a cylindrical body to be coated by the coating method of claim 1,
The rubber portion is formed in a cylindrical shape whose front end portion is opened by an elastic material, and the ultrasonic microphone as the trunk portion is formed in a cylindrical shape and has a transmission / reception surface for transmitting and receiving ultrasonic waves on the front end surface. A sensor unit is provided.

According to the present invention, since the ultrasonic sensor is coated by the coating method of claim 1, the coating material adheres to the rubber part without increasing the number of members of the ultrasonic sensor and in the assembled state of the ultrasonic sensor. The wave transmitting / receiving surface can be painted while preventing, for example, after-coating according to the color of the bumper at a dealer.

In the present invention, there is an effect that the front end surface of the body portion can be painted without increasing the number of members of the tube body and preventing the paint from adhering to the rubber portion in the assembled state of the tube body.

It is sectional drawing when the jig for coating of embodiment of this invention is attached to an ultrasonic sensor. It is a perspective view before attaching the jig for a coating in the same to an ultrasonic sensor. It is a top view of the ultrasonic sensor in the same as the above. It is principal part sectional drawing of the jig for coating in the same as the above. It is sectional drawing when the ultrasonic sensor in the same as the above is attached to the bumper of a vehicle.

Hereinafter, regarding the coating method of the embodiment of the present invention, the object to be coated is an ultrasonic sensor 1 as shown in FIGS.
This will be described with reference to FIG. However, the object to be coated by the coating method of the present embodiment is not limited to the ultrasonic sensor 1.

The basic configuration of the ultrasonic sensor 1 of the present embodiment is the same as that of the ultrasonic sensor 1 described in the related art, and thus the same components are denoted by the same reference numerals and description thereof is omitted. Further, since the cover portion 11 of the ultrasonic sensor 1 described in the prior art is not necessary until the wave transmitting / receiving surface 22a is painted and attached to the bumper 5, the cover portion 11 is omitted from the following description. In the following description, the vertical and horizontal directions are defined in FIG.

As shown in FIG. 1, the ultrasonic sensor 1 includes a sensor unit 2, a controller unit 3, and a housing unit 4. As shown in FIGS. 1 to 3, protrusions 4 c and 4 d that protrude in the shape of a flat rectangular plate toward the outside are disposed on the upper and lower ends of the body portion 4 b of the housing portion 4. A pair of long grooves 4e and 4e that are recessed inward in a long and narrow rectangular shape extending in the front-rear direction are formed on the left and right ends of the upper end surface of the convex portion 4c and the lower end surface of the convex portion 4d. Further, as shown in FIGS. 2 and 3, a connector portion 6 formed in a cylindrical shape with both left and right ends opened is provided at the right end portion of the body portion 4 b of the housing portion 4. The space inside the connector part 6 communicates with the space inside the body part 4b in which the controller part 3 is accommodated. And the output terminal of the above-mentioned processing circuit of the controller unit 3 is an electronic control unit (ECU) that performs a notification process provided in, for example, the passenger compartment through a connection line (not shown) wired in the connector unit 6. When an obstacle is detected by the ultrasonic sensor 1, a buzzer sounds or a recorded voice is output to notify the presence of the obstacle.

As shown in FIGS. 1 and 2, the painting jig 7 used in the painting method of this embodiment includes a main body portion 7 a and a pair of latches as attachment means for detachably attaching the main body portion 7 a to the ultrasonic sensor 1. Pieces 7b, 7b. The main body portion 7a is formed in a rectangular plate shape, and an insertion hole 8 having a shape equal to the outer shape of the vibration case 22b that surrounds the ultrasonic microphone 22 is provided through the center of the rear surface thereof. The locking pieces 7b, 7b are each formed in a rectangular plate shape from a synthetic resin material, and project from the vicinity of the upper and lower portions of the peripheral edge portion through which the insertion hole 8 on the rear surface of the main body portion 7a penetrates toward the rear. Convex pieces 7c and 7c projecting inward are disposed at the rear left and right ends of the opposing surfaces of the locking pieces 7b and 7b, respectively. At the rear end portions of the locking pieces 7b and 7b, holding pieces 7d and 7d that extend so as to be separated from each other are extended. The interval between the locking pieces 7b and 7b is equal to the dimension between the upper and lower ends including the convex portions 4c and 4d of the ultrasonic sensor 1.

As shown in FIG. 4, a groove 9 that is recessed inward along the peripheral edge of the insertion hole 8 is provided on the rear surface of the main body 7 a. The inner peripheral surface 9a of the groove 9 is formed in a tapered shape that expands outward. The inner diameter dimension of the groove portion 9 is substantially equal to the outer diameter dimension of the rubber portion 21 including the flange 21a. On the other hand, as shown in FIG.
A recess 10 is provided which is recessed inward along the peripheral edge. Inner bottom surface 10a of the recess 10
Is formed in a tapered shape that expands inward.

Hereinafter, a coating method in which the coating jig 7 as described above is attached to the ultrasonic sensor 1 for coating will be described. First, the locking pieces 7b and 7b and the convex portions 4c and 4d are opposed to each other while the rear surface of the main body portion 7a and the wave transmitting / receiving surface 22a of the ultrasonic microphone 22 are opposed to each other (see FIG. 2). Next, the peripheral surface 21b of the rubber part 21 is pressed backward against the elastic restoring force, and the ultrasonic microphone 22 is inserted into the insertion hole 8 while the rubber part 21 is bent by elastic deformation. At this time, since the groove portion 9 described above is provided in the peripheral portion of the insertion hole 8, the front end portion of the rubber portion 21 is fitted into the groove portion 9, so that the insertion hole 8 and the ultrasonic microphone 22 are mutually axially centered. It is possible to prevent the occurrence of misalignment and facilitate the insertion operation. At the same time, the locking pieces 7b and 7b slide on the upper and lower end surfaces of the ultrasonic sensor 1 while being bent outward by elastic deformation, and the convex pieces 7c are locked in the long grooves 4e. Since the elastic restoring force of the rubber part 21 is in the forward direction, the locking is not released by the backward movement of the coating jig 7.

By attaching the coating jig 7 to the ultrasonic sensor 1 in this way, the peripheral surface 21b of the rubber part 21 and the wave transmitting / receiving surface 22a of the ultrasonic microphone 22 are not substantially flush with each other as shown in FIG. Be drunk. In this state, if the paint is sprayed from the front of the coating jig 7 toward the transmission / reception surface 22a, for example, with air spray, even when the ultrasonic sensor 1 is assembled, the rubber part 21 is shielded by the main body 7a. The wave transmitting / receiving surface 22a can be painted while preventing adhesion of paint. Moreover, it is not necessary to increase the number of members unlike the rubber part described in Patent Document 1. Furthermore,
Since the concave portion 10 is provided on the front surface of the main body portion 7a, when the coating material is sprayed from the front of the coating jig 7, excess paint adhered to the concave portion 10 is ultrasonic microphone 22.
It is possible to prevent the liquid from dripping toward.

In addition, after the coating material sprayed on the transmission / reception surface 22a dries, the holding piece 7d of the coating jig 7 is used.
, 7d and are spread outward to disengage the projecting pieces 7c, 7c from the long grooves 4e, 4e, whereby the coating jig 7 can be easily detached from the ultrasonic sensor 1. Further, when the painting jig 7 is removed, the ultrasonic microphone 2 is used so far by the elastic restoring force of the rubber portion 21.
Since the peripheral surface 21b of the rubber portion 21 that has been maintained in a state that is not substantially flush with the second transmission / reception surface 22a returns to the original substantially flush state, the aesthetic appearance of the ultrasonic sensor 1 can be maintained.

Incidentally, an object to be coated by the coating method of the present embodiment is an ultrasonic sensor. However, the present invention is not limited to this. For example, the object to be coated may be a millimeter wave sensor that detects an obstacle by transmitting and receiving millimeter waves, a laser sensor that detects an obstacle by transmitting and receiving laser beams, and the like.

DESCRIPTION OF SYMBOLS 1 Ultrasonic sensor 2 Sensor part 7 Coating jig 7a Main body part 7b Locking piece 8 Insertion hole 21 Rubber part 21b Peripheral surface 22 Ultrasonic microphone 22a Transmission / reception surface 22a

Claims (5)

It is a painting method for painting a cylindrical body to be coated using a painting jig,
The cylindrical body includes a rubber portion formed in a cylindrical shape whose front end portion is opened by an elastic material, and a body portion formed in a cylindrical shape, and a front end surface of the body portion and a peripheral edge where the rubber portion opens. The rubber part is extrapolated to the trunk part so as to be substantially flush with the surface, and is integrally assembled,
The coating jig is formed in a rectangular plate shape and has a body portion in which an insertion hole having a shape equal to the outer shape of the body portion is provided in the front-rear direction, and the cylindrical body when the body portion is inserted through the insertion hole. Mounting means that can be detachably attached to,
The coating jig is placed in the insertion hole while the peripheral surface of the rubber portion is pressed backward against the elastic restoring force by opposing the rear surface of the main body portion and the front end surface of the body portion to the cylindrical body. The body portion is inserted and attached, and the front end surface of the body portion is painted while the peripheral surface of the rubber portion and the front end surface of the body portion are not substantially flush with each other. Method. 2. A coating jig used in the coating method according to claim 1, wherein the insertion hole is formed in a rectangular plate shape and has an insertion hole having a shape equal to the outer shape of the body portion in the front-rear direction. And a mounting tool that is detachably attached to the cylindrical body when the body portion is inserted through the coating jig. The rear surface of the main body is provided with a groove that is recessed inward along the peripheral edge of the insertion hole, and the inner peripheral surface of the groove is formed in a tapered shape that expands outward. The coating jig according to claim 2, wherein the jig is a coating jig. The front surface of the main body is provided with a recess that is recessed inward along the peripheral edge of the insertion hole, and the inner bottom surface of the recess is formed in a tapered shape that expands inward. The coating jig according to claim 2 or 3, wherein It is an ultrasonic sensor which is a cylinder coated with the coating method according to claim 1, wherein the rubber part is formed in a cylindrical shape whose front end portion is opened by an elastic material, and is formed in a cylindrical shape and is superposed on the front end surface. An ultrasonic sensor comprising a sensor unit including the ultrasonic microphone serving as the body having a transmission / reception surface for transmitting and receiving a sound wave.

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