Resin molded product and method of determining deterioration thereof

Abstract

To enable easy determination of deterioration of resin molded products without having to break the resin molded products.SOLUTION: A resin molded product is made of a given resin material and is provided with a test piece 20 designed to allow determination of deterioration of the resin molded product 10 and a holding piece 11 having the test piece 20 removably attached thereto. A degree of deterioration of the resin molded product 10 is determined using the test piece 20 removed from the holding piece 11.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a resin molded product made of a predetermined resin material, such as a component constituting an apparatus, and a method for determining deterioration thereof. [Background technology]

[0002] 2. Description of the Related Art Conventionally, resin molded products (resin parts) made of a predetermined resin material have been used as components in various devices (industrial products) (see, for example, Patent Document 1). Once such resin molded products have completed their useful life in the market and are collected from the market, their degree of deterioration is assessed at recycling plants, etc., and a decision is made as to whether or not they can be reused depending on the degree of deterioration.

[0003] On the other hand, Patent Document 1 discloses a technique for measuring the breaking force when a hole is made in a semiconductor component storage tray using a measuring device, and determining whether or not the tray can be reused based on the measurement results. Summary of the Invention [Problem to be solved by the invention]

[0004] Conventional resin molded products had to be broken into parts to determine whether they could be reused or not, making it difficult to use them for parts where appearance is important, such as exterior covers.

[0005] The present invention has been made to solve the above-mentioned problems, and aims to provide a resin molded product and a method for determining deterioration of a resin molded product, which can easily determine deterioration without breaking the product. [Means for solving the problem]

[0006] The resin molded product of this invention is a resin molded product made of a predetermined resin material, and is provided with a test piece that can determine the deterioration of the resin molded product, and a holding portion to which the test piece is removably mounted, and the degree of deterioration of the resin molded product is determined using the test piece removed from the holding portion. Effect of the Invention

[0007] According to the present invention, it is possible to provide a resin molded product and a method for determining deterioration of a resin molded product, which can easily determine deterioration without breaking the resin molded product. [Brief description of the drawings]

[0008] [Figure 1] 1 is a perspective view showing an apparatus according to an embodiment of the present invention; [Diagram 2] 1A is a perspective view showing a resin molding with a test piece attached thereto, and FIG. 1B is a perspective view showing the resin molding with the test piece removed therefrom. [Diagram 3] FIG. 11 is a side cross-sectional view showing a state in which the test piece is deformed. [Figure 4] 1 is a graph showing the relationship between strain and stress of a test piece. [Diagram 5] FIG. 13 is a perspective view showing a resin molded product as a first modified example. [Figure 6] FIG. 11 is a perspective view showing a resin molded product as a second modified example. [Figure 7] 13A is a perspective view showing a resin molded product as a modified example 3, and FIG. 13B is a side view of the resin molded product as seen from the direction A. FIG. [Figure 8] FIG. 13 is a perspective view showing a resin molded product as a fourth modified example. [Figure 9] FIG. 13 is a perspective view showing a resin molded product as a fifth modified example. [Figure 10] FIG. 13 is a perspective view showing a resin molded product as a sixth modified example. [Figure 11] FIG. 13 is a perspective view showing a device as a seventh modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Hereinafter, the embodiments of the present invention will be described in detail with reference to the drawings. In each drawing, the same or corresponding parts are denoted by the same reference numerals, and the duplicated description will be appropriately simplified or omitted.

[0010] As shown in FIG. 1, a device 1 is provided with a reusable resin molded product 10. The resin molded product 10 is made of a predetermined resin material (for example, PC resin, PET resin, ABS resin, etc.). Then, when the device 1 reaches the end of its useful life in the market, the device 1 is collected from the market, and the degree of deterioration of the resin molded product 10 disassembled from the device 1 at a recycling plant or the like is judged. Then, depending on the degree of deterioration, it is determined whether or not the resin molded product 10 can be reused.

[0011] In this embodiment, an image forming device such as a printer is used as the device 1, but the device 1 is not limited to this and may be any industrial product. In addition, in this embodiment, an exterior cover is used as the reusable resin molded product 10, but the reusable resin molded product 10 is not limited to this, and any resin molded product may be used. Furthermore, in this embodiment, the resin molded product 10 is a component part of the device 1 that is distributed on the market, but the resin molded product 10 may also be a product that is distributed on the market by itself. Industrial products include home appliances, electronic products, communication devices, and other electronics products, transportation equipment such as automobiles, vehicles, and elevators, unit products for kitchens and bathrooms, structures such as houses and buildings, civil engineering parts such as road signs, exterior casing parts for daily necessities, various storage containers, toys, audio equipment, beauty equipment, etc. More specifically, examples of such components include electric kettles, humidifiers, rice cookers, rice cake makers, coffee makers, and dishwashers and dryers, as well as air conditioner components, connector housings for electrical connections in automotive wire harnesses, and storage trays for semiconductor components.

[0012] Here, referring to Figure 2 etc., the resin molded product 10 in this embodiment is provided with a test piece 20 capable of determining deterioration of the resin molded product 10, and a holding portion 11 in which the test piece 20 is removably mounted. The test piece 20 is a thin, approximately rectangular parallelepiped member made of a resin material having approximately the same strength degradation characteristics as the resin molded product 10. Specifically, in this embodiment, the test piece 20 is made of the same resin material as the resin molded product 10, has approximately the same thickness, and is formed under approximately the same molding conditions. On the other hand, the holding part 11 is a concave protruding part (with the inside recessed into a rectangular parallelepiped shape) formed so as to be able to lightly hold the test piece 20. The holding part 11 is made of the same resin material as the resin molded product 10, and is formed as part of the resin molded product 10 in the same molding process. The holding part 11 is formed so as to rise from a non-exterior surface of the resin molded product 10 (an inner wall surface that is not exposed when the product is attached to the device 1 as shown in FIG. 1).

[0013] Then, referring to FIG. 2(B), the degree of deterioration of the resin molded product 10 is judged using the test piece 20 removed from the holding portion 11. More specifically, as shown in Fig. 2(A), when the resin molded product 10 is attached to the device 1, the test piece 20 is attached to the holding portion 11. The resin molded product 10 is collected from the market to a recycling factory or the like with the test piece 20 attached (as shown in Fig. 2(A)), and the test piece 20 is removed from the resin molded product 10 as shown in Fig. 2(B). The removed test piece 20 is used to determine deterioration and to judge whether the resin molded product 10 can be reused.

[0014] The test piece 20 removed from the resin molded product 10 is supported in a cantilever manner by a jig 100, as shown in Fig. 3. In this state, a force F is applied to the test piece 20 by a person's finger or the like to deform the free end side of the test piece 20, and the presence or absence of deterioration (strength deterioration) is judged based on the presence or absence of plastic deformation or breakage. Specifically, when a predetermined external force F is applied to the test piece 20 removed from the holding portion 11, or when it is deformed by a certain amount δ, the presence or absence of deterioration of the resin molded product 10 is determined based on the presence or absence of fracture or plastic deformation. In other words, as a method for determining deterioration of the resin molded product 10, a deformation step is first performed in which the test piece 20 removed from the holding part 11 is deformed. Then, when the deformation step causes breakage or plastic deformation in the test piece 20, a determination step is performed in which it is determined that deterioration has occurred in the resin molded product 10. Specifically, the resin molded product 10 determined to have deteriorated is not reused, and only the resin molded product 10 determined to have not deteriorated is reused. In addition, when the resin molded product 10 is reused, the test piece 20 used to determine deterioration (which has not undergone any breakage or plastic deformation) will be set again in the holding portion 11 of the resin molded product 10.

[0015] In this manner, the resin molded product 10 in this embodiment is not subjected to a deterioration judgment by breaking or plastically deforming a part of it to judge whether it can be reused, but rather, a deterioration judgment is performed for possible deterioration due to breakage or plastic deformation using a test piece 20 for deterioration judgment removed from the resin molded product 10 to judge whether the resin molded product 10 can be reused. Therefore, even if the resin molded product 10 is a part for which appearance is important, deterioration can be easily judged without breaking or plastically deforming it, and it can be reused as is.

[0016] In this embodiment, the deterioration of the resin molded product 10 is judged by deforming the test piece 20, but the deterioration of the resin molded product 10 can also be judged by breaking or plastically deforming the test piece 20. Specifically, when an external force is applied to the test piece 20 removed from the holding portion 11 until it breaks or plastically deforms, the presence or absence of deterioration of the resin molded product 10 can be determined based on the magnitude of the external force. In such a case, a breaking step is first performed in which an external force F is applied to the test piece 20 removed from the holding part 11 to break it. Then, a determination step is performed in which it is determined whether or not deterioration has occurred in the resin molded product 10, based on the magnitude of the external force F when the test piece 20 breaks in the breaking step. Specifically, if the magnitude of the external force F when the test piece 20 breaks does not reach the threshold value Fx, the resin molded product 10 is not reused, and if the magnitude of the external force F when the test piece 20 breaks exceeds the threshold value Fx, the resin molded product 10 is reused.

[0017] Note that Figure 4 is a graph showing the relationship between strain ? and stress σ in test piece 20, where Figure 4(A) shows the test piece 20 (resin molded product 10) when no deterioration has occurred, and Figure 4(B) shows the test piece 20 (resin molded product 10) when deterioration has occurred. 4(A), there is no strength degradation in the initial state of the test piece 20 (resin molded product 10), and when force is applied to the test piece 20 (resin molded product 10), it undergoes elastic deformation up to a certain stress (see range X1), and when that stress is exceeded, it undergoes plastic deformation, and when the deformation becomes even larger, it finally breaks (see range X2). The stress at the time of plastic deformation or breakage at this time can be roughly regarded as the strength of the material (test piece 20, resin molded product 10). In contrast, as shown in Figure 4(B), when the strength of the test piece 20 (resin molded product 10) deteriorates over time due to the effects of heat, ultraviolet rays, chemicals, etc., for example, a decrease in the molecular weight of the resin material, its Young's modulus (the slope of the graph within the elastic region) remains almost unchanged, but deterioration that causes sudden destruction with almost no plastic deformation occurs at a smaller stress than in a state without deterioration is likely to occur. The strength of the material (test piece 20, resin molded product 10) at this time is smaller than in a state without deterioration (the state in Figure 4(A)).

[0018] Here, the resin molded product 10 in this embodiment is an exterior cover, and as described above, has a hidden surface that is not exposed when attached to the device 1. In the resin molded product 10, the holding portion 11 and the test piece 20 are placed on the non-appearance surface thereof. With this configuration, the appearance of the device 1 is not marred by the resin molded product 10 on which the holding portion 11 and the test piece 20 are provided.

[0019] In addition, in this embodiment, the test piece 20 removed from the holding portion 11 can also be used to determine the degree of deterioration of another resin molded product 14 (see Figure 1) installed in the equipment in which the resin molded product 10 is installed. In this embodiment, the other resin molded product 14 is an exterior cover installed on the front side of the device 1, and is formed from the same resin material under the same molding conditions as the resin molded product 10 (exterior cover) installed on the side of the device 1. Such a configuration improves efficiency in determining whether or not the components of the device 1 can be reused overall.

[0020] <Variation 1> As shown in FIG. 5, the resin molded product 10 in the first variant has one test piece 20 and a number of holding portions (in the example of FIG. 5, there are two holding portions, a first holding portion 11A and a second holding portion 11B). 5(A), the test piece 20 is held in the first holding part 11A of the brand new resin molded product 10. After completing its role as a device 1 in the market, the resin molded product 10 is collected in a recycling plant or the like, and the deterioration of the test piece 20 (resin molded product 10) is judged using the test piece 20 removed from the first holding part 11A. Then, if it is determined that the test piece 20 (resin molded product 10) has not deteriorated and can be reused, the test piece 20 is set in the second holding portion 11B of the resin molded product 10 to be reused, as shown in Figure 5 (B). In this way, by changing the position of the holding portion that holds the test piece 20 depending on whether the resin molded product 10 is new or a reused product, the usage history of the resin molded product 10 can be ascertained. If a larger number of holders are provided, it will be possible to grasp the number of times the container is reused.

[0021] <Variation 2> As shown in FIG. 6, the resin molded product 10 in variant example 2 is provided with a plurality of test pieces (in the example of FIG. 6, there are two test pieces, a first test piece 20A and a second test piece 20B) and a plurality of holding portions in the same number as the number of test pieces 20A, 20B (in the example of FIG. 6, there are two holding portions, a first holding portion 11A and a second holding portion 11B). 6(A), in a brand new resin molded product 10, a first test piece 20A is held in the first holding portion 11A, and a second test piece 20B is held in the second holding portion 11B. After the use of the device 1 in the market is completed, the resin molded product 10 is collected in a recycling plant or the like, and the deterioration of the first test piece 20A (resin molded product 10) is judged using the first test piece 20A removed from the first holding portion 11A. Then, when it is determined that the first test piece 20A (resin molded product 10) is not deteriorated and can be reused, the first test piece 20A is not returned to the first holding part 11A of the resin molded product 10 to be reused, and the second test piece 20B is held only by the second holding part 11B, as shown in Fig. 6(B). When determining whether the reused resin molded product 10 can be reused again, the second test piece 20B removed from the second holding part 11B is used. In this way, the number of test pieces 20A, 20B is changed depending on whether the resin molded product 10 is a new product or a reused product, so that the usage history of the resin molded product 10 can be known.

[0022] <Variation 3> As shown in FIG. 7, in the resin molded product 10 of the third modified example, the test piece 20 attached to the holding portion 11 functions as a rib that reduces deformation of the resin molded product 10. Specifically, the test piece 20 is held by the holding part 11 so that its longitudinal direction (the left-right direction in FIG. 7) is the same as the longitudinal direction of the resin molded product 10 (so that their longitudinal directions are parallel to each other). Also, the test piece 20 (and the holding part 11) is arranged so as to stand upright in a substantially vertical direction from the non-appearance surface of the resin molded product 10. With this configuration, the test piece 20 functions as a reinforcing rib, reducing the problem of the resin molded product 10 warping (deforming) in the longitudinal direction.

[0023] <Modification 4> As shown in Figure 8, the resin molded product 10 in variant example 4 has markings on at least one of the holding portions 11A, 11B and the test piece 20 (in the example of Figure 8, only the holding portions 11A, 11B) to identify the number of times the resin molded product 10 can be reused. Specifically, the first holding portion 11A has a mark 11Aa indicating "0," and the second holding portion 11Ba has a mark 11b indicating "1." These marks 11Aa and 11Ba are formed by engraving, decals, screen printing, laser printing, or the like, and are formed at positions that can be seen even when the test piece 20 is held. The test piece 20 is held in the first holding part 11A of the brand new resin molded product 10. After the device 1 has completed its role in the market, the resin molded product 10 is collected at a recycling plant or the like, and a deterioration judgment is made on the test piece 20 (resin molded product 10) using the test piece 20 removed from the first holding part 11A. At this time, the worker can tell from the display 11Aa of "0" on the first holding part 11A that this is the first time that a deterioration judgment is being made on the test piece 20 (resin molded product 10). Then, when it is determined that the test piece 20 (resin molded product 10) has not deteriorated and can be reused, the test piece 20 is set in the second holding portion 11B of the resin molded product 10 to be reused. When determining whether the reused resin molded product 10 can be reused again, the second test piece 20B removed from the second holding portion 11B is used, and the worker can understand from the "1" display 11Ba on the second holding portion 11B that the deterioration judgment of this test piece 20 (resin molded product 10) has been made once and that this is the second time. In this way, by changing the position of the holding portion that holds the test piece 20 depending on whether the resin molded product 10 is new or a reused product, the usage history of the resin molded product 10 can be ascertained. If a larger number of holders are provided, it will be possible to ascertain the number of times the item has been reused, more than twice.

[0024] <Variation 5> As shown in Figure 9, the resin molded product 10 in variant example 5 has markings on at least one of the holding portion 11 and the test piece 20 (in the example of Figure 9, both the holding portion 11 and the test piece 20) to identify the number of times the resin molded product 10 can be reused. Specifically, the holding part 11 has a marking 11a of "0" on one end in the longitudinal direction, and a marking 11b of "1" on the other end in the longitudinal direction. The test piece 20 has a marking 20a (arrow marking) of "→" on the end in the longitudinal direction. These marks 11a, 11b, and 20a are formed by engraving, decals, screen printing, laser printing, or the like. 9(A), for a brand new resin molded product 10, the test piece 20 is held in the holder 11 so that the arrow 20a of the test piece 20 points to the "0" 11a of the holder 11. After the device 1 has completed its role in the market, the test piece 20 (resin molded product 10) is removed from the holder 11 and used to determine deterioration of the test piece 20 (resin molded product 10) when the resin molded product 10 is collected at a recycling plant or the like. At this time, the worker can understand that this is the first time that deterioration of the test piece 20 (resin molded product 10) is being determined, since the arrow 20a points to the "0" 11a of the holder 11. Then, when the test piece 20 (resin molded product 10) is judged to be reusable without deterioration, the test piece 20 is set in the holder 11 of the resin molded product 10 to be reused so that the arrow 20a points to the mark "1" 11b of the holder 11, as shown in Fig. 9(B). When judging whether the reused resin molded product 10 can be reused again, the test piece 20 taken out from the holder 11 is used, and the worker can understand that the deterioration judgment of the test piece 20 (resin molded product 10) has been made once and that this is the second time, because the arrow 20a points to the mark "1" 11b of the holder 11. In this way, by changing the indicators 11a, 11b that the arrow indicator 20a of the test piece 20 points to depending on whether the resin molded product 10 is new or a reused product, the usage history of the resin molded product 10 can be ascertained.

[0025] <Variation 6> As shown in FIG. 10, a resin molded product 10 in the sixth modification is a duct body on which a partition wall and a straightening plate are formed, and constitutes a duct 9 by being covered with a duct cover 15 as a mating member. This duct 9 is installed inside the device 1 and serves to draw air from the outside of the device 1 and flow it into the inside, thereby cooling the inside. Here, in the sixth modification, the resin molded product 10 is also provided with a retaining portion 11 and a test piece 20. The retaining portion 11 and the test piece 20 are provided in a space (internal space) formed by the duct cover 15 (a mating part to be attached to the resin molded product 10 in the device 1 in which the resin molded product 10 is installed) and the resin molded product 10. Specifically, in the example of Fig. 10, the test piece 20 and the retaining portion 11 are formed as part of a partition wall that forms a duct flow path, and the test piece 20 is detachably installed on the partition wall. Furthermore, even with the resin molded product 10 configured in this manner, deterioration of the resin molded product 10 can be easily determined without breaking the resin molded product 10.

[0026] <Variation 7> As shown in FIG. 11, the device 1 in the seventh modification has a holder 11 and a test piece 20 provided on the exterior surface of a resin molded product 10 (the surface that is exposed when attached to the device 1). Information about the device 1 is displayed on at least one of the holder 11 and the test piece 20 (only the test piece 20 in the example of FIG. 11). Specifically, a logo mark 20x reading "RICOH" is formed on the surface of the test piece 20 by engraving, decal, screen printing, laser printing, etc. In the sixth modified example, the logo mark 20 is formed on the surface of the test piece 20, but a model number or the like can also be formed.

[0027] As described above, the resin molded product 10 in this embodiment is a resin molded product made of a predetermined resin material, and is provided with the test piece 20 that can determine the deterioration of the resin molded product 10, and the holding part 11 to which the test piece 20 is detachably installed. Then, the degree of deterioration of the resin molded product 10 is determined using the test piece 20 removed from the holding part 11. This makes it possible to easily determine the deterioration of the resin molded product 10 without breaking the resin molded product 10.

[0028] It is clear that the present invention is not limited to the present embodiment, and that the present embodiment may be modified as appropriate within the scope of the technical concept of the present invention in addition to the modifications suggested in the present embodiment. Furthermore, the number, position, shape, etc. of the components are not limited to the present embodiment, and may be any number, position, shape, etc. suitable for implementing the present invention. [Explanation of symbols]

[0029] 1 equipment (image forming device), 9 ducts, 10 Resin molded products (exterior covers), 11 holding part; 11A first holding part, 11B second holding part, 11Aa, 11Ba, 11a, 11b display, 14 Another resin molding, 15 Duct cover (mating member), 20 test pieces, 20A first test piece, 20B second test piece, 20a display, 20x logo mark.

[0030] The present invention can also be embodied in the following combinations of Supplementary Notes 1 to 14. (Appendix 1) A resin molded product made of a predetermined resin material, A test piece capable of determining deterioration of the resin molded product; a holder in which the test piece is removably mounted; Equipped with A resin molded product, characterized in that the degree of deterioration of the resin molded product is judged using the test piece removed from the holding portion. (Appendix 2) 2. The resin molded product according to claim 1, wherein the test piece is made of a resin material having strength degradation characteristics substantially equivalent to those of the resin molded product. (Appendix 3) The resin molding has a non-exterior surface that is not exposed when the resin molding is attached to the device, The resin molded product according to claim 1 or 2, wherein the holding portion and the test piece are disposed on the non-appearance surface. (Appendix 4) The resin molded product has an exterior surface that is exposed when the resin molded product is attached to the device, The resin molded product described in Appendix 1 or Appendix 2, characterized in that the holding portion and the test piece are installed on the exterior surface, and information about the device is displayed on at least one of them. (Appendix 5) 5. The resin molded product according to any one of claims 1 to 4, comprising one of the test pieces and a plurality of the holding portions. (Appendix 6) 5. The resin molded product according to any one of claims 1 to 4, comprising a plurality of the test pieces and a plurality of the holding portions, the number of which is the same as the number of the test pieces. (Appendix 7) The resin molded product described in any one of Appendix 1 to Appendix 6, characterized in that the holding portion and the test piece are provided in a space formed by the resin molded product and a mating part to be assembled to the resin molded product in an apparatus in which the resin molded product is installed. (Appendix 8) 8. The resin molded product according to any one of claims 1 to 7, wherein the test piece attached to the holding part functions as a rib for reducing deformation of the resin molded product. (Appendix 9) The resin molded product according to any one of claims 1 to 8, characterized in that the test piece removed from the holding portion is also used to determine the degree of deterioration of another resin molded product installed in a device in which the resin molded product is installed. (Appendix 10) 10. The resin molded product according to any one of claims 1 to 9, characterized in that at least one of the holding portion and the test piece is marked to specify the number of times the resin molded product can be reused. (Appendix 11) The resin molded product according to any one of claims 1 to 10, characterized in that the presence or absence of deterioration of the resin molded product is determined by the presence or absence of fracture or plastic deformation when a predetermined amount of external force is applied to the test piece removed from the holding portion or when the test piece is deformed by a certain amount. (Appendix 12) The resin molded product according to any one of claims 1 to 10, characterized in that when an external force is applied to the test piece removed from the holding portion until breakage or plastic deformation occurs, the presence or absence of deterioration of the resin molded product is determined based on the magnitude of the external force. (Appendix 13) A method for determining deterioration of a resin molded product made of a predetermined resin material, comprising: The resin molded product includes a test piece capable of determining deterioration of the resin molded product, and a holding portion to which the test piece is detachably attached, a deformation step of deforming the test piece removed from the holding portion; a determination step of determining that deterioration has occurred in the resin molded product when breakage or plastic deformation has occurred in the test piece as a result of the deformation step; A deterioration determination method for a resin molded product, comprising: (Appendix 14) A method for determining deterioration of a resin molded product made of a predetermined resin material, comprising: The resin molded product includes a test piece capable of determining deterioration of the resin molded product, and a holding portion to which the test piece is detachably attached, a breaking step of applying an external force to the test piece removed from the holding part to break the test piece; a determination step of determining whether or not the resin molding has deteriorated based on the magnitude of the external force when the test piece is broken in the breaking step; A deterioration determination method for a resin molded product, comprising: [Prior art documents] [Patent documents]

[0031] [Patent Document 1] Patent No. 3998383

Claims

1. A resin molded product made of a predetermined resin material, A test piece capable of determining deterioration of the resin molded product; a holder in which the test piece is removably mounted; Equipped with A resin molded product, characterized in that the degree of deterioration of the resin molded product is judged using the test piece removed from the holding portion.

2. 2. The resin molded product according to claim 1, wherein the test piece is made of a resin material having strength degradation characteristics substantially equivalent to those of the resin molded product.

3. The resin molding has a non-exterior surface that is not exposed when the resin molding is attached to the device, 3. The resin molded product according to claim 1, wherein the holding portion and the test piece are disposed on the non-appearance surface.

4. The resin molded product has an exterior surface that is exposed when the resin molded product is attached to the device, 3. The resin molded product according to claim 1, wherein the holding portion and the test piece are disposed on the exterior surface, and information about the device is displayed on at least one of them.

5. 3. The resin molded product according to claim 1, further comprising one test piece and a plurality of the holding portions.

6. 3. The resin molded product according to claim 1, further comprising a plurality of the test pieces and a plurality of the holding portions, the number of which is equal to the number of the test pieces.

7. The resin molded product according to claim 1 or claim 2, characterized in that the holding portion and the test piece are provided in a space formed by the resin molded product and a mating part to be assembled to the resin molded product in an equipment in which the resin molded product is installed.

8. 3. The resin molded product according to claim 1, wherein the test piece attached to the holding portion functions as a rib for reducing deformation of the resin molded product.

9. The resin molded product according to claim 1 or claim 2, characterized in that the test piece removed from the holding portion is also used to determine the degree of deterioration of another resin molded product installed in equipment in which the resin molded product is installed.

10. 3. The resin molded product according to claim 1, wherein at least one of the holding portion and the test piece is marked to specify the number of times the resin molded product can be reused.

11. The resin molded product according to claim 1 or claim 2, characterized in that the presence or absence of deterioration of the resin molded product is determined by the presence or absence of fracture or plastic deformation when a predetermined amount of external force is applied to the test piece removed from the holding portion or when it is deformed by a certain amount.

12. A resin molded product as described in claim 1 or claim 2, characterized in that when an external force is applied to the test piece removed from the holding portion until breakage or plastic deformation occurs, the presence or absence of deterioration of the resin molded product is determined based on the magnitude of the external force.

13. A method for determining deterioration of a resin molded product made of a predetermined resin material, comprising: The resin molded product includes a test piece capable of determining deterioration of the resin molded product, and a holding portion to which the test piece is detachably attached, a deformation step of deforming the test piece removed from the holding portion; a determination step of determining that deterioration has occurred in the resin molded product when breakage or plastic deformation has occurred in the test piece as a result of the deformation step; A deterioration determination method for a resin molded product, comprising:

14. A method for determining deterioration of a resin molded product made of a predetermined resin material, comprising: The resin molded product includes a test piece capable of determining deterioration of the resin molded product, and a holding portion to which the test piece is detachably attached, a breaking step of applying an external force to the test piece removed from the holding part to break the test piece; a determination step of determining whether or not the resin molding has deteriorated based on the magnitude of the external force when the test piece is broken in the breaking step; A deterioration determination method for a resin molded product, comprising:

Images