JP6134564B2 - Fixed structure of molded product - Google Patents

Description

  The present invention relates to a structure for fixing a molded product in which a boss portion is formed integrally with a molded product and a member to be attached is fixed by a screw member screwed into a tip of the boss portion.

  In general, when two molded products are assembled, a female screw hole is formed in one molded product, a screw insertion hole is formed in the other molded product, and a female screw hole of one molded product is formed from the screw insertion hole of the other molded product. Two molded products are integrally assembled by screwing a screw member into a screw hole.

  In this case, when there is a wide internal space between the two molded products to be assembled, a fixing structure (a screw structure such as a bolt and a nut) is provided at a portion (for example, a peripheral portion) where the two molded products are joined. When it is not preferable for reasons such as appearance and strength, it is necessary to provide a fixing structure such as screw fixing so as to straddle a wide internal space.

  Specifically, as shown in FIG. 12, in the molded product 210 on the female screw hole side, a long cylindrical boss 213 is erected on the rear surface 212 of the molded product, and is coaxial with the upper surface of the boss 213. A female screw hole 214 is formed in a shape.

  On the other hand, in the molded product 220 on the screw insertion hole side through which the screw member 230 is inserted, a cylindrical concave portion 223 through which the screw member 230 is inserted is formed from the surface 222 side of the molded product as necessary, and the screw is formed on the bottom surface of the concave portion 223. An insertion hole 224 is formed.

  When the two molded products 210 and 220 are joined, the female screw hole 214 of the boss portion 213 and the screw insertion hole 224 on the bottom surface of the concave portion 223 are arranged so as to face each other in the vertical direction, and in this state, the concave portion 223 is arranged. By screwing the screw member 230 into the female screw hole 214 from the side, the two molded products 210 and 220 are assembled together.

  In this case, when the boss portion 213 erected on the back surface 212 of the molded product is long, the boss portion 213 may be deformed by a load when the screw member 230 is screwed. As shown in FIG. 13B, a plurality of reinforcing ribs 215 (four in this example) are generally formed on the outer peripheral surface of the boss portion 213 (see, for example, Patent Documents 1 and 2).

  In this case, in order to form the reinforcing rib 215 on the outer peripheral surface of the boss portion 213, a sufficient space is required in the peripheral portion of the boss portion 213. However, there is a problem in that the reinforcing rib 215 cannot be provided when this space cannot be secured due to the shape of the molded product.

  Further, when forming a long boss portion 213 as shown in FIGS. 13A and 13B, a pin for forming a female screw hole 214 in the boss portion 213 needs to be provided on the mold side. When a long pin is provided, the pin is deformed by the filling pressure of the resin, which causes a problem that the mold structure becomes complicated. Further, if the pin is shortened to form the boss portion 213 having a solid lower end, the strength of the portion can be ensured, but the wall thickness is increased, and there is a problem that the periphery of the boss portion 213 is drawn. In addition, there is a problem that the boss portion 213 is slightly tilted due to this shrinkage.

  Therefore, in such a case, as shown in FIGS. 14A and 14B, first, column parts 240A and 240B that become pedestals are first erected on the back surface of the molded product, and the upper surfaces (the pedestal upper surfaces) of these column parts 240A and 240B. A structure in which a boss portion 250 is provided on the surface is performed (see, for example, Patent Document 3).

JP 2009-166782 A JP-A-7-276445 Japanese Utility Model Publication No. 63-41141

  14A includes a pair of leg pieces 240a and a base piece 240b that connects the upper ends of the leg pieces 240a. In the case of this structure, if the leg piece 240a is made too long, the leg piece 240a is deformed so as to be twisted by a load when the screw member is screwed in, so that the leg piece 240a cannot be made too long.

  Moreover, the support | pillar part 240B shown to FIG. 14B is formed in the planar view substantially semicircular arc shaped box-shaped body by which only one side surface was opened 240e. In the case of this structure, since the opening is only on one side surface, the strength is improved as compared with the support column 240A shown in FIG. 14A. However, if the column portion 240B is lengthened, the opening 240e also has a vertically long shape, and there is a possibility that the opening portion having a low strength is twisted with respect to the load when the screw member is screwed. There was a problem that the support post 240A could not be made too long.

  The present invention has been devised to solve such problems. The purpose of the present invention is to fix a molded product by integrally forming a boss portion on a molded product and fixing a member to be attached by a screw member screwed into the tip of the boss portion. An object of the present invention is to provide a structure for fixing a molded product that can increase the strength of a support portion that supports a boss portion.

  In order to solve the above-described problems, the molded product fixing structure according to the present invention is a molded product fixing structure in which a boss portion is formed integrally with the molded product, and a member to be attached is fixed by a screw member screwed into the tip of the boss portion. The boss portion is integrally formed with the molded product via a box-shaped support portion, and the support portion has an opening on one surface along the standing direction, and the inside of the support portion. In this configuration, reinforcing ribs that are inclined with respect to the standing direction when viewed from the opening side are integrally formed.

  According to this configuration, since the reinforcing rib that is inclined with respect to the standing direction when viewed from the opening side is integrally formed in the inside of the column portion, the column portion when the screw member is screwed into the tip of the boss portion. Even when a large load (such as compression and torsional load) is applied to the metal, sufficient strength can be obtained by receiving the load with the reinforcing rib and dispersing the stress.

Moreover, according to the fixing structure of the molded product according to the present invention, the reinforcing rib is inclined in the screwing direction of the screw member (a direction along the inclination of the ridge line of the screw thread) when viewed from the opening side. The configuration is provided.

  Reinforcing the rib against the load even if the load (compression, torsional load, etc.) applied to the tip of the boss is applied to the support by inclining the reinforcing rib in the screwing direction of the screw member. The ribs will act just as struts. As a result, the torsional load can be directly received by the reinforcing rib.

  Moreover, according to the fixed structure of the molded product which concerns on this invention, the height dimension of the said support | pillar part is taken as the structure larger than the height dimension of the said boss | hub part. In the case where the height dimension of the support portion is equal to or smaller than the height dimension of the boss portion, a certain degree of strength can be obtained even with the support structure of the conventional structure. In particular, the invention is effective when the height of the support column is larger than the height of the boss.

  Moreover, according to the fixing structure of the molded product which concerns on this invention, it is good also as a structure by which the partition rib extended in the said standing direction was integrally formed with the said reinforcement rib inside the said support | pillar part.

  According to this configuration, since the internal space is further divided into a plurality of small spaces, the stress with respect to the load can be more finely distributed, and the number of reinforcing ribs is increased, so that the strength of the support column is further increased. . Moreover, the intensity | strength increases more by forming a partition rib and a reinforcement rib integrally with a support | pillar part.

  Moreover, according to the fixed structure of the molded product which concerns on this invention, the said reinforcement rib is good also as a structure respectively formed in the same position in the said standing direction on both sides of the said partition rib.

  By providing the reinforcing rib for each small space partitioned by the partition rib, the strength of the column portion is further increased. In this case, by forming the reinforcing ribs at the same position in the standing direction, the load (compression, torsional load, etc.) when the screw member is screwed into the tip of the boss part is distributed and received almost uniformly by each reinforcing rib. be able to.

  Moreover, according to the fixing structure of the molded product which concerns on this invention, you may form two or more said reinforcement ribs by making the inclination direction the same direction or different.

  According to this structure, when a support | pillar part is long, intensity | strength can be increased by providing a some rib piece in one space part.

  According to the present invention, since the reinforcing rib that is inclined with respect to the standing direction when viewed from the opening side is integrally formed in the support column, the support column is screwed when the screw member is screwed into the tip of the boss. Even if a large load (compression and torsional load) is applied to the part, this load (particularly torsional load) is received by the reinforcing ribs, and sufficient strength can be obtained by dispersing the stress. That is, even when a large load is applied to the support column, the support column is not twisted and deformed, or cracks are not generated. In addition, according to the present invention, since the internal space of the support column is reinforced, there is no need to provide reinforcing ribs on the outer peripheral surface of the support column, and space can be saved correspondingly.

FIG. 3 is a partially broken perspective view illustrating the case where the fixed structure of a molded product according to the present invention is applied to the fixed structure of two molded products having the most basic shape. It is a longitudinal cross-sectional view of two molded products shown in FIG. It is AA sectional view taken on the line of FIG. 2A. It is the partially broken side view which shows the application example 1 of a support | pillar part. It is the partially broken side view which shows the application example 2 of a support | pillar part. It is the partially broken side view which shows the application example 3 of a support | pillar part. It is the partially broken side view which shows the application example 4 of a support | pillar part. It is an external view which shows the specific example of the product manufactured using the molded article to which the fixing structure of this invention is applied. It is a perspective view which shows the holding | maintenance part to which the fixing structure of this invention was applied. It is a disassembled perspective view of a holding | maintenance part. It is a front view of a rear side holding part. It is an end view which shows the fixing structure of a front side holding part and a rear side holding part. It is sectional drawing which shows an example of the conventional fixing structure. Plan view of conventional fixing structure It is the BB sectional view taken on the line of FIG. 13A. It is a perspective view which shows the other example of the conventional fixing structure. It is a perspective view which shows the other example of the conventional fixing structure.

  Embodiments of the present invention will be described below with reference to the drawings.

  The molded product fixing structure according to the present invention is a molded product fixing structure in which a boss portion is formed integrally with the molded product, and a member to be attached is fixed by a screw member screwed into the tip of the boss portion.

  1, 2A and 2B exemplify the case where the structure for fixing a molded product according to the present invention is applied to the structure for fixing two molded products having the most basic shapes. FIG. FIG. 2A is a longitudinal sectional view of the two molded products shown in FIG. 1, and FIG. 2B is a sectional view taken along line AA of FIG. 2A.

  The molded product 1 includes an upper molded product 1a and a lower molded product 1b formed in a cylindrical box shape. The lower end opening edge 1a1 of the upper molded product 1a and the upper end opening edge of the lower molded product 1b. By making 1b1 into a concavo-convex fitting structure, the structure is fitted together.

  In this structure, as a structure for firmly fixing both the molded products 1a and 1b after fitting, the lower molded product 1b includes a column portion 1b3 which is erected on the molded product main body back surface 1b2 and integrally formed, and the column. A boss portion 1b4 formed integrally with the upper surface of the portion 1b3 is provided, and an upper molded product 1a corresponding to the boss portion 1b4 includes a cylindrical recess 1a3 formed integrally with the molded product main body upper surface 1a2. A screw insertion hole 1a4 is formed in the bottom surface of the recess 1a3, and a screw insertion hole 1b8 opened in the standing direction X of the support column 1b3 is formed in the corresponding boss 1b4 of the lower molded product 1b. Is formed. That is, in this basic shape, the lower molded product 1b corresponds to the molded product according to the present invention, and the upper molded product 1a corresponds to the mounted member according to the present invention.

  On the other hand, the support column 1b3 is formed in a vertically long box-like body having an opening 1b31 on one surface along the standing direction X, and an opening is provided between the inner side surfaces 1b5 and 1b5 opposed to the box-like body. As viewed from the portion 1b31, the reinforcing rib 1b6 is integrally formed so as to be inclined with respect to the standing direction X of the column portion 1b3.

  More specifically, the reinforcing rib 1b6 is provided so as to be inclined in the screwing direction R of the screw member 2 when viewed from the opening 1b31 side. By providing the reinforcing rib 1b6 so as to be inclined in the screwing direction R of the screw member 2, even when a load (such as compression and torsion load) when the screw member 2 is screwed into the tip of the boss portion 1b4 is applied to the support column 1b3, The reinforcing rib 1b6 just acts as a tension rod against the load. Thereby, in particular, a torsional load (load applied in the screwing direction R) can be effectively received by the reinforcing rib 1b6. Therefore, even if a large load is applied to the column part 1b3, the column part 1b3 is twisted and deformed or cracked. There is no cracking.

In this case, the height dimension H2 of the column part 1b3 is configured to be larger than the height dimension H1 of the boss part 1b4. When the height dimension of the column portion 1b3 is equal to or smaller than the height dimension of the boss portion 1b4, a certain degree of strength can be obtained even with a column structure having a conventional structure. Therefore, the structure for fixing a molded product according to the present invention is particularly effective when the height of the support column 1b3 is larger than the height of the boss 1b4.

  In this case, it is preferable that the position where the reinforcing rib 1b6 is formed is the upper part of the column part 1b3 close to the boss part 1b4. Specifically, it is preferable to provide a height higher than ½ of the column portion 1b3, more preferably 2/3 of the column portion. By providing the reinforcing rib 1b6 near the boss portion 1b4, a load (particularly a torsional load) directly applied to the boss portion 1b4 can be received in the vicinity of the boss portion 1b4 and dispersed on the upper side of the column portion 1b3. Therefore, even when the support column 1b3 is long, the influence of the torsional load on the lower side can be reduced.

  The inclination angle of the reinforcing rib 1b6 may be any inclination angle as long as it is not horizontal, but more preferably an arbitrary inclination within a range of approximately 30 degrees to 60 degrees with respect to the horizontal direction. The angle is considered to be excellent in strength in relation to the screwing direction R. However, this inclination angle is not limited to these ranges because it depends on the shape (length, width, etc.) of the column portion 1b3. It also depends on how much strength is required.

  According to this configuration, when a screw member 2 such as a tapping screw is screwed into the screw insertion hole 1b8 of the boss portion 1b4, this load is applied even if a large load (compression load, torsion load, etc.) is applied to the column portion 1b3. Sufficient strength can be obtained by receiving the reinforcing rib 1b6 and dispersing the stress. That is, even if a large load is applied to the support column 1b3, the support column 1b3 is not twisted and deformed, or cracks are not generated. In addition, according to this configuration, since the internal space of the column portion 1b3 is reinforced by the reinforcing rib 1b6, the space can be saved as compared with the conventional reinforcing structure in which the reinforcing rib is provided on the outer peripheral surface of the column portion 1b3. Can also be planned.

  The structure of the support column 1b3 shown in FIGS. 1, 2A, and 2B illustrates the most basic structure. Hereinafter, some application examples derived from the basic structure will be described.

  FIG. 3 is a partially broken side view showing an application example 1 of the support column 1b3.

  In the application example 1, the partition rib 1b7 that partitions the internal space in the direction Y orthogonal to the standing direction X is formed inside the support column 1b3, and the reinforcing rib 1b6 includes the inner side surface 1b5 of the support column 1b3 and the partition rib 1b7. It is set as the structure each provided between. That is, the partition rib 1b7 extending in the standing direction X is integrally formed with the reinforcing rib 1b6 inside the column portion 1b3. In the application example 1, the reinforcing ribs 1b6 are provided in the same inclination direction and at the same position in the standing direction X.

  According to this configuration, the internal space of the support column 1b3 is further divided into a plurality of small spaces, and the number of reinforcing ribs 1b6 is increased by the amount of the small spaces, so that the strength of the support column 1b3 is further increased. Further, by forming the reinforcing ribs 1b6 in the same inclination direction and at the same position in the standing direction X, the load when the screw member 2 is screwed into the tip of the boss portion 1b4 is almost evenly applied to each reinforcing rib 1b6. Can be distributed and received.

  FIG. 4 is a partially broken side view showing an application example 2 of the support column 1b3.

  In the application example 1, the reinforcing rib 1b6 is inclined in the same direction, but in the application example 2, the opposing reinforcing rib 1b6 is inclined in the opposite direction. That is, the reinforcing rib 1b6 on the left side in the drawing is inclined in the direction opposite to the screwing direction R when viewed from the opening 1b31 side. In this case, the left reinforcing rib 1b6 mainly reinforces the partition rib 1b7. In this way, by providing the plurality of reinforcing ribs 1b6 in an inclined direction in the opposite direction, the load applied to each reinforcing rib 1b6 can be dispersed in different directions.

  FIG. 5 is a partially cutaway side view showing an application example 3 of the column portion 1b3.

  The application example 3 is a further application example from the application example 1, and has a configuration in which a plurality of reinforcing ribs 1b6 (two in the upper and lower sides in this example) are provided along the standing direction X. When the column portion 1b3 is long, the strength can be increased by providing a plurality of reinforcing ribs along the standing direction X in one small space in this way. In the application example 3, each reinforcing rib 1b6 in one small space is provided in the same inclination direction. Further, the reinforcing ribs 1b6 of the small spaces are provided at the same position in the standing direction X. Thus, the strength of the column portion 1b3 can be further increased by providing a plurality of reinforcing ribs 1b6 in the same inclination direction in each small space.

  FIG. 6 is a partially broken side view showing an application example 4 of the support column 1b3.

  The application example 4 is a modification of the application example 3, and a plurality of (two in this example) reinforcing ribs 1b6 provided along the standing direction X are arranged so that the inclination directions are different from each other in each small space. The configuration is provided. That is, it is set as the structure which provided the two reinforcement ribs 1b6 in the shape of a square in one small space. Thus, by making the inclination directions different from each other, it is possible to disperse and receive the load applied to the reinforcing rib 1b6 in various directions.

  Of course, the application examples 3 and 4 can also be applied to the basic structure shown in FIGS. In the basic structure and application examples 1 to 4, the reinforcing rib 1b6 is described as a flat plate, but the reinforcing rib 1b6 may be formed in a curved shape, for example. This is because, depending on how the stress is applied, there may be a case where the curved shape is more effective in dispersing the stress than the flat plate shape. In the first to fourth application examples, only one partition rib 1b7 is provided, but a plurality of partition ribs 1b7 may be arranged with a predetermined interval. In this case, the reinforcing rib 1b6 is similarly arranged between the opposing partition ribs 1b7 and 1b7.

  FIG. 7 is an external view showing a specific example of a product manufactured using a molded product to which the fixing structure having the above configuration is applied. In this specific example, a fan is illustrated as an example of a product.

  The electric fan 10 includes a base 11 installed on the floor surface, a support rod 12 erected on the base 11, a sliding rod 13 provided so as to be vertically slidable with respect to the support rod 12, A holding portion 14 that is rotatably attached to the upper end portion of the sliding rod 13 in a horizontal direction, a motor storage portion 15 that is held by the holding portion 14 and is rotatably attached to an elevation angle direction, and a motor storage portion 15. The fan 16 attached to the rotating shaft (illustration omitted) of the accommodated motor, and the front guard 17a and the back guard 17b which guard the fan 16 are provided. The fixing structure of the present invention described later is applied to the holding portion 14.

  The base 11 is formed in a disk shape, for example, and has a built-in control unit on which an operation panel (not shown) for driving the motor, a microcomputer, and the like are mounted.

  The column rod 12 is formed in a cylindrical shape having an open top, and a sliding rod 13 is inserted therein so as to be slidable in the vertical direction.

  Although details are omitted, the sliding rod 13 has a structure that cannot be completely removed from the column rod 12 and can be fixed at an arbitrary position drawn upward from the column rod 12. Such a structure is a conventionally well-known structure, and a similar well-known structure may be applied to this specific example.

  FIG. 8 is a perspective view showing the holding portion 14 to which the fixing structure of the present invention is applied. However, in FIG. 8, the motor storage unit 15 is indicated by an imaginary line.

  The holding portion 14 includes a base portion 141 connected to the upper end portion of the sliding rod 13 and a pair of arm portions 142 and 142 extending upward from the left and right end portions of the base portion 141, and stores the motor. The part 15 is held between both arm parts 142 and 142 of the holding part 14 formed in a substantially U shape in a front view. Further, the holding portion 14 is formed so as to spread forward and backward from the upper side of the arm portion 142 toward the lower side of the base portion 141 in order to hold the motor storage portion 15 stably. As shown in FIG. 7, it is formed in a substantially semi-elliptical shape that is inclined so as to protrude slightly forward when viewed from the side. Note that reference numeral 143 in FIG. 8 is a holding opening hole for inserting and holding a support shaft (not shown) protruding from the left and right sides of the motor housing portion 15. In FIG. 8, only the left holding opening hole 143 is provided. It is shown in the figure.

  FIG. 9 is an exploded perspective view of the holding portion 14, and FIG. 10 is a front view of a rear holding portion 14b described later.

  The holding part 14 has a hollow interior for weight reduction. Therefore, as shown in FIG. 9, the holding portion 14 includes a substantially semi-dome-shaped front holding portion 14 a that is opened to the rear side including the front base portion 141 a and the front arm portion 142 a, a rear base portion 141 b, and a rear portion. It is configured by combining two molded products of a substantially semi-dome-shaped rear holding portion 14b opened to the front side consisting of the side arm portion 142b. That is, the holding part 14 has a structure in which the divided peripheral end faces of the molded product divided into two parts in front and rear are fitted in an uneven shape, and the whole is fixed by a screw member 30 such as a tapping screw.

  Therefore, in the holding part 14 shown in FIG.9 and FIG.10, the support | pillar part 1b3 and the boss | hub part 1b4 are each integrally formed in the right and left two places of the rear side base part 141b of the rear side holding part 14b, and the front side holding part 14a Concave portions 1a3 each having screw insertion holes 1a4 are integrally formed at two opposing positions of the front base portion 141a. Here, in this example, the support column 1b3 is illustrated as the structure of the application example 1, but the basic structure and the structures of the application examples 2 to 4 may be used.

  In this specific example, the same fixing structure is adopted for the upper end portion of the arm portion 142 in addition to the above two locations. However, only the reference numerals are added as necessary, and the fixing structure for the arm portion 142 is used. Description of is omitted.

  In such a structure, as shown in FIG. 11, the concave and convex portions 18a and 18b on the divided peripheral end surfaces of the front holding portion 14a and the rear holding portion 14b are fitted together, and a tapping screw or the like is inserted into the concave portion 1a3 from the front holding portion 14a side. The screw member 30 is inserted into the screw insertion hole 1b8 of the boss 1b4 through the screw insertion hole 1a4 on the bottom surface of the recess 1a3, so that the front holding part 14a and the rear holding part 14b are integrated. It is fixed to.

  At this time, even if the screw member 30 is tightened strongly, the column portion 1b3 formed in a long shape is reinforced by the reinforcing rib 1b6 and the partition rib 1b7, so that the column portion 1b3 is deformed against the tightening load of the screw. Neither cracks nor cracks occur.

  In the above embodiment, the fixing structure of the present invention is applied to the portion of the screw tightening structure. However, the present invention is not limited to such a tightening structure, and it is necessary to form a long column portion on the molded product. And when sufficient intensity | strength is required for the support | pillar part, it is possible to apply the fixing structure of this invention, especially the structure of the support | pillar part which concerns on this invention.

  As described above, due to the shape of the holding portion 14, a wide space is required between the front base portion 141a and the rear base portion 141b. Therefore, considering the strength, the fixing structure of the present invention is used. Is preferred.

  In addition, the molded product of the said embodiment can be shape | molded by injection molding using resin materials, such as ABS (acrylonitrile butadiene styrene copolymer) resin and PP (polypropylene) resin, for example. In this case, the lower molded product 1b of the basic structure and the rear holding portion 14b of the specific example cannot be molded only by the upper mold and the lower mold, but the lateral direction of the support column 1b3 is opened and the reinforcing ribs are formed inside. It is necessary to incorporate an undercut slide core or inclined core for forming the 1b6 and the partition rib 1b7 into the mold, and molding a molded product using such a mold structure is a well-known injection. Since this is a molding method, a specific description of a method for molding the lower molded product 1b of the basic structure and the rear holding portion 14b of the specific example is omitted here.

  2A and 2B, the reinforcing rib 1b6 is formed on the inner surface (1b5, 1b5) facing the box-shaped body and the surface facing the opening 1b31. When three sides are coupled to each surface (formed integrally), and the reinforcing rib 1b6 is coupled only between the opposing inner side surfaces 1b5, 1b5 (two sides) of the box-shaped body, Although it is easy to bend by screwing, compared to this, the three sides are bonded (integrally formed) to each surface, the strength of the reinforcing rib 1b6 itself is improved, and the above-described slide core and the like are incorporated in the mold. Using a conventional injection molding method, a molded product can be molded relatively easily.

-Summary of composition and effect of the present invention-
The molded product fixing structure according to the present invention is a molded product fixing structure in which a boss portion 1b4 is formed integrally with a molded product 1b, and the member to be attached 1a is fixed by a screw member 2 screwed into the tip of the boss portion 1b4. The boss 1b4 is integrally formed with the molded product 1b via a box-shaped column 1b3, and the column 1b3 has an opening 1b31 on one surface along the standing direction X. A reinforcing rib 1b6 that is inclined with respect to the standing direction X when viewed from the opening 1b31 side is integrally formed in the support column 1b3.

  According to this configuration, since the reinforcing rib that is inclined with respect to the standing direction when viewed from the opening side is integrally formed in the inside of the column portion, the column portion when the screw member is screwed into the tip of the boss portion. Even when a large load (such as compression and torsional load) is applied to the metal, sufficient strength can be obtained by receiving the load with the reinforcing rib and dispersing the stress. That is, even when a large load is applied to the support column, the support column is not twisted and deformed, or cracks are not generated. In addition, according to the present invention, since the internal space of the support column is reinforced, there is no need to provide reinforcing ribs on the outer peripheral surface of the support column, and space can be saved correspondingly.

  Moreover, according to the fixing structure of the molded product according to the present invention, the reinforcing rib 1b6 is provided so as to be inclined in the screwing direction R of the screw member 2 when viewed from the opening 1b31 side.

  By providing the reinforcing rib 1b6 so as to be inclined in the screwing direction R of the screw member, even if a load (compression, torsional load, etc.) when screwing the screw member into the tip of the boss portion 1b4 is applied to the support column 1b3, the load On the other hand, the reinforcing rib 1b6 just serves as a tension rod. Thereby, in particular, the torsional load can be directly received by the reinforcing rib 1b6, so that even if a large load is applied to the support column portion 1b3, the support column portion 1b3 is not twisted and deformed or cracked.

  Moreover, according to the fixed structure of the molded product which concerns on this invention, the height dimension of the said support | pillar part 1b3 is taken as the structure larger than the height dimension of the said boss | hub part 1b4. The molded article fixing structure according to the present invention is particularly effective when the height of the support column is larger than the height of the boss.

  Further, according to the molded product fixing structure of the present invention, the partition rib 1b7 extending in the standing direction X is integrally formed with the reinforcing rib 1b6 inside the support column 1b3.

According to this configuration, since the internal space is further divided into a plurality of small spaces, the stress with respect to the load can be more finely distributed, and the number of reinforcing ribs 1b6 is increased, so that the strength of the column portion 1b3 is further increased. become. Moreover, the intensity | strength increases more by forming the partition rib 1b7 and the reinforcement rib 1b6 integrally with the support | pillar part 1b3.

  Moreover, according to the fixing structure of the molded product which concerns on this invention, the said reinforcement rib 1b6 is each formed in the same position in the said standing direction X on both sides of the said partition rib 1b7.

  By providing the reinforcing rib 1b6 for each small space partitioned by the partition rib 1b7, the strength of the column portion 1b3 is further increased. In this case, by forming the reinforcing ribs 1b6 at the same position in the standing direction X, the load (such as compression and torsional load) when the screw member is screwed into the tip of the boss portion 1b4 is almost evenly distributed between the reinforcing ribs 1b6. Can be distributed and received.

  Moreover, according to the fixing structure of the molded product which concerns on this invention, you may form two or more said reinforcement rib 1b6 by making the inclination direction into the same direction or different.

  According to this structure, when the support | pillar part 1b3 is long, intensity | strength can be increased by providing the some reinforcement rib 1b6 in one space part. In this case, by setting the inclination direction to the same direction, the load (such as compression and torsional load) when the screw member is screwed into the tip of the boss portion 1b4 can be distributed and received almost uniformly by the reinforcing ribs 1b6. Further, by making the inclination directions different, the load applied to each reinforcing rib 1b6 can be distributed and received in various directions.

  In addition, the said embodiment disclosed this time is an illustration in all the points, Comprising: It does not become a basis of limited interpretation. Therefore, the technical scope of the present invention is not interpreted only by the above-described embodiments, but is defined based on the description of the scope of claims. Moreover, all the changes within the meaning and range equivalent to a claim are included.

  The fixing structure of the molded product according to the present invention can be suitably used particularly in general fixing structures in the case of fixing molded products having a structure that requires a longer support portion.

1 Molded product 1a Upper molded product (attachment member)
1a1 Lower end opening edge 1a2 Molded product upper surface 1a3 Recessed portion 1a4 Screw insertion hole 1b Lower molded product (molded product)
1b1 Upper end opening edge 1b2 Molded product main body back surface 1b3 Supporting part 1b31 Opening part 1b4 Boss part 1b5 Inner side 1b6 Reinforcement rib 1b7 Partitioning rib 1b8 Screw insertion hole 11 Base 12 Supporting pillar 13 Sliding rod 14 Holding part 14a Front holding part 14a Rear side holding part 15 Motor housing part 16 Fan 17a Front guard 17b Rear guard 18a, 18b Uneven part 30 Screw member 141 base part 141a Front base part (molded product main body)
141b Rear base (molded product body)
142 Arm part 142a Front arm part 142b Rear arm part X Standing direction Y Direction perpendicular to standing direction R Torsion direction

Claims (6)

A molded product fixing structure in which a boss portion is formed integrally with a molded product, and a member to be attached is fixed by a screw member screwed into the tip of the boss portion,
The boss part is integrally formed with the molded product via a box-shaped support part,
The supporting column has an opening on one surface along the standing direction,
A fixing structure for a molded product, wherein a reinforcing rib that is inclined with respect to the standing direction as viewed from the opening side is integrally formed inside the support column. The structure for fixing a molded product according to claim 1,
The structure for fixing a molded product, wherein a height dimension of the support portion is larger than a height dimension of the boss portion. A structure for fixing a molded product according to claim 1 or 2,
A plurality of the reinforcing ribs are formed in the same direction or different in inclination direction. It is the fixed structure of the molded product according to any one of claims 1 to 3,
A fixing structure for a molded product, wherein partition ribs extending in the standing direction are integrally formed with the reinforcing ribs in the support column. The structure for fixing a molded product according to claim 4,
The structure for fixing a molded product, wherein the reinforcing ribs are formed on both sides of the partition rib and at the same position in the standing direction. A molded product fixing structure in which a boss portion is formed integrally with a molded product, and a member to be attached is fixed by a screw member screwed into the tip of the boss portion,
The boss part is integrally formed with the molded product via a box-shaped support part,
The supporting column has an opening on one surface along the standing direction,
The molding is characterized in that a reinforcing rib is formed integrally with the inside of the support column, which is inclined in a direction along the inclination of the ridgeline of the thread of the screw member when viewed from the opening side. Product fixing structure.