JP2001234906A - Mounting part structure for molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a mounting structure for a molding without using a slide core mold for reducing costs. SOLUTION: A mounting part 10 has two through-holes 11 and 12 substantially perpendicular to each other. A portion ranging between each of the through- holes 11 and 12 is opened with a portion where the through-holes 11 and 12 cross in between. The through-holes 11 and 12 are mutually communicated along each of the through-holes 11 and 12. A portion where the through-holes 11 and 12 substantially face each other along their penetrating directions can be eliminated so that the mounting part can be integrally formed from a core mold and a cavity mold into the molding without needing the slide core mold. As a result, molding time is reduced and mold cost is suppressed for reducing manufacturing cost.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting structure for a molded product.

[0002]

2. Description of the Related Art Conventionally, a molded part which is attached to a mating member by screwing is integrally formed with an attaching portion having a screw insertion hole. For example, as shown in FIG. 10, substantially rectangular mounting portions 7 are provided at both ends in the longitudinal direction of a substantially rectangular molded product 70.
5 are integrally formed so as to be substantially flush with one surface along the longitudinal direction of the molded product 70, and each of the mounting portions 75 has a direction substantially perpendicular to the surface substantially flush with the molded product 70. Screw 90
, And a substantially circular screw insertion hole 76 is formed.

[0003] Such a molded article 70 is arranged so that a surface substantially flush with the mounting portion 75 is substantially opposed to the mating member 80, and a screw 90 is inserted into the screw insertion hole 76 to form the mating member 8.
It is fixed by screwing it to zero.

However, since the screw insertion holes 76 are formed in only one direction in each of the mounting portions 75, 75, the molded article 70 is inserted into the mating member 80 from a direction different from the screw insertion direction of the screw insertion holes 76. Could not be attached.

Therefore, as shown in FIG. 11, two mounting portions 75 ', 75' are arranged so as to be substantially flush with two adjacent surfaces along the longitudinal direction of the molded article 70, and the respective mounting portions 75 ', 75' In addition to the screw insertion hole 76, a screw 90 is inserted through the portion 75 ′ in a direction substantially perpendicular to the screw insertion direction of the screw insertion hole 76, and a substantially rectangular screw insertion hole 77 that intersects with the screw insertion hole 76 inside. Already exists.

In such a molded product 70, one of two surfaces substantially flush with the mounting portion 75 'is disposed so as to substantially face the mating member 80, and the screw 90 is inserted through the screw 90. By being inserted into the hole 76 or the screw insertion hole 77 and screwed to the mating member, it can be attached to the mating member 80 from either the screw insertion direction of the screw insertion hole 76 or the screw insertion direction of the screw insertion hole 77. it can.

[0007]

However, since the screw insertion direction of the screw insertion hole 77 of the above-described mounting portion 75 'is substantially orthogonal to the screw insertion direction of the screw insertion hole 76, the mounting portion 75' is formed. As shown in FIG. 12, a substantially rectangular column-shaped slide core mold 6 is provided at a portion corresponding to the screw insertion hole 77.
0 is required.

When the molded article 70 is formed integrally with the mounting portion 75 ', first, the slide core mold 60 is inserted into the screw insertion hole 7.
It is arranged at the site corresponding to 7. Next, the core mold and the cavity mold are combined so as to sandwich the slide core mold 60. At this time, a substantially cylindrical core cylindrical mold 6 formed integrally with the core mold in a portion corresponding to the screw insertion hole 76.
1 and a substantially cylindrical cavity mold 62 formed integrally with the cavity mold are arranged along a direction substantially perpendicular to the longitudinal direction of the slide core mold 60. Abut. Then, after filling and molding the resin between the cavity mold and the core mold, the slide core 60 is pulled out along the longitudinal direction, and the molded article 70 is taken out by removing the core mold and the cavity mold.

When molding the molded article 70 in this way,
The necessity of the slide core mold 60 increases the mold cost, complicates the molding operation, takes a long molding time, and increases the manufacturing cost.

An object of the present invention is to solve the above-mentioned problems, and to provide a structure for mounting a molded product at a reduced cost without using a slide core mold.

[0011]

In order to achieve the above-mentioned object, the invention according to claim 1 is characterized in that a mounting portion formed on a molded product includes:
A mounting part structure in which two through holes penetrating from different directions and intersecting inside are provided, and a screw is inserted into one of the through holes and a molded product is screwed to a mating member. It is characterized in that a portion straddling each through-hole is opened along the through-hole with a portion intersecting the two through-holes interposed therebetween. Substantially opposing parts can be eliminated, and the mounting part can be formed from the core mold and the cavity mold without the need for a slide core mold. As a result, molding work is simplified and molding time is reduced. The manufacturing cost can be reduced by reducing the die cost.

According to a second aspect of the present invention, in the first aspect of the present invention, the mounting portions are integrally formed at both ends of the molded product, and the openings formed along the through holes of the mounting portions are formed on the molded product side. It is characterized in that it is provided at substantially the same position of the mounting portion as viewed from above, and by opening the openings of each mounting portion in different directions, for example, a When the screw is inserted and screwed to the counterpart member, even if the screw is tilted toward the opening, they do not tilt in substantially the same direction, so that it is possible to prevent the molded product from being attached to the counterpart member while being tilted. .

According to a third aspect of the present invention, in the first or second aspect of the present invention, a through hole is formed from one end of the mounting portion opposite to the molded product along the arrangement direction of the mounting portion formed integrally with the molded product. The length from the other end of the mounting portion to the portion where the through hole is formed is longer than the length from the other end of the mounting portion, and the through hole is formed from one end of the mounting portion opposite to the molded product. By increasing the length to the formed portion, the strength around the through hole of the mounting portion can be increased.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the molded product and the mounting portion are each formed in a substantially rectangular shape, and two adjacent surfaces on which the opening of the mounting portion is formed. Is characterized by being substantially flush with two adjacent surfaces of the molded product,
When the molded product is attached to the mating member, the molded product and the mounting portion can be brought into contact with the mating member and screwed, and the molded product can be stably attached.

[0015]

(Embodiment 1) In this embodiment,
As shown in FIG. 1, substantially rectangular mounting portions 10, 10 are provided at both ends in the longitudinal direction of a substantially rectangular molded product 70 so as to be substantially flush with two adjacent surfaces along the longitudinal direction of the molded product 70. Are formed integrally.

The mounting portion 10 has a through hole 1 that is substantially orthogonal inside.
1 and 12 are penetrated, and two through holes 11 and
12 intersect with each other through holes 11, 12
Are opened along the through holes 11 and 12.

When a molded article 70 having such mounting portions 10 integrally formed on both ends is mounted on a mating member 80, a screw 90 is inserted through one of the through holes 11 and 12 of each mounting portion 10. The molded article 70 can be attached to the mating member 80 from either direction of the through-holes 11 and 12.

Moreover, since a portion straddling the respective through holes 11 and 12 is opened along the through holes 11 and 12 with a portion where the two through holes 11 and 12 intersect therebetween, the mounting portion 10 has a through hole. The portions substantially opposing each other along the respective penetrating directions of the holes 11 and 12 can be eliminated. For example, as shown in FIG. 2, substantially L-shaped L-shaped dies 21a and 22 are formed.
a are arranged at the portions corresponding to the openings 13, respectively, and as shown in FIG. 3, the L-shaped molds 21 a, 22 a are brought into contact with each other, whereby the above-described through holes 11, 12 communicating with each other are formed. Can be formed. For example, as shown in FIG. 4, an L-shaped mold 21a is integrally formed in a recess 21b corresponding to the mounting portion 10 of the cavity mold 21, and the L-shaped mold 22a is further integrated with the mounting portion 10 of the core mold 22. When integrally formed at a portion corresponding to the above, the core mold 22 and the cavity mold 21 are vertically combined in the figure, and a resin is poured between the core mold 22 and the cavity mold 21 to form a molded product. 70 is the mounting part 10
Can be integrally formed.

As described above, in the present embodiment, the core mold 22 is used without using the slide core mold 60 unlike the conventional example.
The mounting portion 10 can be formed from the two molds of the mold and the cavity mold 21. As a result, the molding operation can be facilitated, the molding time can be shortened, the mold cost can be reduced, and the manufacturing cost can be reduced. Reduction can be achieved. Further, two adjacent surfaces having an opening surface of the mounting portion 10 are formed into a molded product 70.
When the molded product 70 is attached to the mating member 80 by being formed substantially flush with two adjacent surfaces along the longitudinal direction of the
The molded article 70 can be stably mounted by abutting on the screw and screwing.

In this embodiment, as shown in FIG. 5, the openings 13, 13 opened along the through holes 11, 12 of the mounting portions 10, 10, respectively, are mounted as viewed from the molded product 70 side. The parts 10 are provided at substantially the same position.
That is, in FIG. 5, one of the openings 13 of the through holes 11 and 12 of the mounting portion 10 formed on the right side of the molded product 70 is
The opening 13 is located on the upper right side of the mounting part 10 when viewed from the side 0, and the other opening 13 is located on the lower left side of the mounting part 10 when viewed from the side of the molded article 70. Similarly, the opening 13 is formed on the left side of the molded article 70. Also in the attached portion 10, one opening 13 of the through holes 11 and 12 is located on the upper right side of the attaching portion 10 when viewed from the molded product 70 side, and the other opening 13 is viewed from the molded product 70 side. Mounting part 1
It is located at the lower left of 0.

On the other hand, as shown in FIG.
The openings 13 of the mounting portion 10 are viewed from the molded product 70 side.
When the mounting portions 10 are formed at both ends of the molded product 70 so as to be located at different positions, one of the openings of the through holes 11 and 12 of the mounting portion 10 formed on the right side of the molded product 70 in the drawing. The portion 13 is located on the upper right side of the mounting portion 10 when viewed from the molded product 70 side, and the other opening 13 is located on the lower left side of the mounting portion 10 when viewed from the molded product 70 side. However, in the mounting portion 10 formed on the left side of the molded product 70, one opening 13 is located on the upper left side of the mounting portion 10 when viewed from the molded product 70 side, and the other opening 13 is positioned from the molded product 70 side. When viewed from the lower right side of the mounting portion 10, the positions are different from the openings 13, 13 of the mounting portion 10 on the right side of the molded article 70.

In the molded article 70 shown in FIG. 6, when the screw 90 is inserted into the through hole 11 of each mounting portion 10 and screwed to the mating member 80, the opening 13 is opened in the same direction. Therefore, the screws 90 may be inclined in substantially the same direction, and the molded product 70 may be attached to the mating member 80 with inclination.

However, as shown in FIG. 5, by providing the openings 13 at substantially the same position on the mounting portion 10 as viewed from the molded product 70, the opening 13 is
10 are opened in different directions.
Are screwed into the mating member 80 by being inserted into the through holes 11 of the respective mounting portions 10, the screws 90, 90 are not inclined in substantially the same direction, and the molded product 70 is moved to the mating member 8.
It can be attached without tilting to zero. (Embodiment 2) Since the basic configuration in this embodiment is common to Embodiment 1, the same reference numerals are given to the common parts, and the description thereof will be omitted, and only the characteristic parts of this embodiment will be described in detail. I do.

In this embodiment, as shown in FIG. 7, through holes 11 and 12 are formed along the longitudinal direction from the surface of the mounting portion 10 opposite to the surface on which the molded product is formed in the longitudinal direction. The length W2 to the site is determined by changing the length of the through-holes 11 and 1 along the longitudinal direction from the surface of the mounting portion 10 where the molded product in the longitudinal direction is formed.
The length W1 is longer than the length W1 up to the portion where 2 is formed.

For example, as shown in FIG.
2 having substantially the same length, the strength of the periphery of the through holes 11 and 12 of the mounting portion 10 is reduced by the fact that the opening surfaces of the through holes 11 and 12 communicate with each other. The strength around the holes 76 and 77 becomes weaker.
Therefore, by making at least the length W2 longer than the length W1, the strength around the through holes 11, 12 of the mounting portion 10 can be kept equal to that of the mounting portion 75 'of the conventional example.

By the way, as shown in FIG. 9, for example, the mounting structure of the present invention can be applied to a housing of a photoelectric sensor 30 for transmitting and receiving infrared rays to detect a human body or the like.

The photoelectric sensor 30 includes a body 31 made of synthetic resin and formed in a substantially rectangular box shape with one surface opened.
A housing, which is a molded product, is constituted by a cover 32 attached so as to cover the opening surface of the first unit 1, and an infrared transmitting / receiving unit is housed inside the body 31 and the cover 32. On the front side of the cover 32, two through holes 34 for transmitting and receiving infrared rays are provided, and on the side of the body 31, an output section 33 for outputting a signal from the infrared transmitting and receiving section is formed. At both ends in the longitudinal direction of the body 31, the mounting portions 10, 10 are integrally formed.

As described above, the mounting portions 10, 10 are attached to the body 31.
Are formed integrally, so that the light transmission 34,
The photoelectric sensor 30 can be screwed to the counterpart member 80 such that the front surface having the front 34 is substantially parallel to or substantially vertical to the counterpart member 80, and the core mold can be used without using a slide core mold. The body 31 can be molded by using the cavity mold and the mold, thereby facilitating the molding operation, shortening the operation time, suppressing the mold cost, and reducing the production cost.

[0029]

According to the first aspect of the present invention, two through holes penetrating from different directions and intersecting with each other are provided in a mounting portion formed on a molded product, and a screw is inserted into one of the through holes. Then, a mounting part structure for screwing the molded product to the mating member is provided. Since a part of the mounting part which straddles each through hole with a part intersecting the two through holes interposed therebetween is opened along the through hole. By opening a portion that straddles the two through holes, it is possible to eliminate portions that are substantially opposed to each other in the through direction of the through hole, and to remove the mounting portion from the core mold and the cavity mold without the need for a slide core mold. As a result, there is an effect that the molding operation can be facilitated to shorten the molding time, the die cost can be suppressed, and the production cost can be reduced.

According to a second aspect of the present invention, in the first aspect of the present invention, the mounting portions are integrally formed at both ends of the molded product, and the openings formed along the through holes of the mounting portions are formed on the molded product side. Since the mounting portions are provided at substantially the same positions as viewed from above, the openings of the respective mounting portions are opened in different directions from each other, for example, a screw is inserted into a through hole penetrating in substantially the same direction of each of the mounting portions. When the screw is tilted toward the opening when screwed to the mating member, it does not tilt in substantially the same direction, so that it is possible to prevent the molded product from being tilted and attached to the mating member. is there.

According to a third aspect of the present invention, in the first or second aspect of the present invention, a through hole is formed from one end of the mounting portion opposite to the molded product along the arrangement direction of the mounting portion formed integrally with the molded product. The length from the other end of the mounting portion to the portion where the through-hole was formed was longer than the length from the other end of the mounting portion, so that the through-hole was formed from one end of the mounting portion opposite to the molded product. By increasing the length up to the portion, there is an effect that the strength around the through hole of the mounting portion can be increased.

According to a fourth aspect of the present invention, in any one of the first to third aspects of the present invention, the molded product and the mounting portion are each formed in a substantially rectangular shape, and two adjacent surfaces on which the opening portion of the mounting portion is formed. Is almost flush with the two adjacent surfaces of the molded product, so when the molded product is attached to the mating member, the molded product and the mounting portion can be brought into contact with the mating member and screwed, and the molded product can be stabilized. There is an effect that it can be attached.

[Brief description of the drawings]

FIGS. 1A and 1B show a first embodiment, in which FIG. 1A is a perspective view, and FIG. 1B is a sectional perspective view of a mounting portion.

FIG. 2 is a perspective view for explaining a molding method of the same.

FIG. 3 is a side sectional view of a mounting portion for explaining a molding method of the same.

FIG. 4 is a perspective view of a core mold and a cavity mold for explaining a molding method of the same.

FIG. 5 is a perspective view showing an example of screwing according to the first embodiment.

FIG. 6 is a perspective view for comparison showing an example of screwing same as above.

FIG. 7 is a perspective view showing a second embodiment.

FIG. 8 is a perspective view for comparison of the above.

FIG. 9 is a perspective view of a photoelectric sensor to which the mounting structure of the present invention is applied.

FIG. 10 is a perspective view showing a conventional example.

FIG. 11 is another perspective view of the above.

FIG. 12 is a perspective view of a mounting portion for explaining a molding method of the above.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Attachment part 11 Through hole 11a, 11b Open surface 12 Through hole 12a Open surface 12b Open surface

Claims (4)

[Claims] 1. A mounting part formed on a molded product is provided with two through holes penetrating from different directions and intersecting inside, and a screw is inserted into one of the through holes to form a molded product on a mating member. A mounting part structure for screwing the mounting part, wherein a part straddling each through hole is opened along a through hole with a part intersecting the two through holes of the mounting part interposed therebetween. Construction. 2. The mounting portion is integrally formed at both ends of the molded product, and the opening portion opened along the through hole of each mounting portion is provided at substantially the same position of the mounting portion as viewed from the molded product side. The mounting part structure for a molded product according to claim 1, wherein: 3. The length of one end of the mounting portion from the side opposite to the molded product to the portion where the through hole is formed, along the direction of arrangement of the mounting portion formed integrally with the molded product. 3. The mounting structure for a molded product according to claim 1, wherein the length is longer than a length from the other end to a portion where the through hole is formed. 4. A molded product and a mounting portion are each formed in a substantially rectangular shape, and two adjacent surfaces on which an opening of the mounting portion is formed are formed.
The mounting part structure for a molded product according to any one of claims 1 to 3, wherein the two adjacent surfaces of the molded product are substantially flush with each other.