Manufacturing method

Abstract

To provide a manufacturing method that enables the proper production of reflective devices. [Solution] A method for manufacturing a reflector 2 that reflects emitted light from a sensor back to the sensor, comprising an attachment step of attaching a reflector 22 that forms the front and side sides of the reflector 2 to a flat plate-shaped base member 21 that forms the back side of the reflector 2, the reflector 22 having a reflecting mechanism 224 for reflecting emitted light, wherein the reflector 22 has a front portion 221 that surrounds the internal space 23 of the reflector 2 from the front side and a side portion 222 that surrounds the internal space 23 of the reflector 2 from the side side, the base member 21 surrounds the internal space 23 of the reflector 2 from the back side, the base member 21 is provided with an exhaust hole 211 for exhausting air from the internal space 23, and in the attachment step, the air in the internal space 23 is exhausted through the exhaust hole 211.

Description

Technical Field

[0001] The present invention relates to a manufacturing method.

Background Art

[0002] Conventionally, a reflection device that reflects the light emitted by a light reduction type sensor to the light reduction type sensor has been known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] By the way, there has been a demand for a technique for appropriately manufacturing a reflection device.

[0005] The present invention has been made in view of the above problems, and an object thereof is to provide a manufacturing method capable of appropriately manufacturing a reflection device.

Means for Solving the Problems

[0006] To solve the above-mentioned problems and achieve the objective, the manufacturing method described in claim 1 is a method for manufacturing a reflecting device that reflects emitted light emitted from a sensor back to the sensor, comprising a mounting step of attaching a reflective member that forms the front and side sides of the reflecting device and has a reflective mechanism for reflecting the emitted light to a flat plate-shaped base member that forms the back side of the reflecting device, wherein the reflective member has a front portion that surrounds the internal space of the reflecting device from the front side and a side portion that surrounds the internal space of the reflecting device from the side side, the base member surrounds the internal space of the reflecting device from the back side, the base member is provided with an exhaust hole for exhausting air from the internal space, and in the mounting step, the air in the internal space is exhausted through the exhaust hole.

[0007] Furthermore, the manufacturing method described in claim 2 is the manufacturing method described in claim 1, wherein a fixing material is provided between the side portion of the reflective member and the base member, and in the mounting step, the reflective member is attached to the base member by melting the fixing material, and when the fixing material is melted, the volume of the internal space of the reflective device decreases, and an amount of air corresponding to the decreased volume of the internal space of the reflective device is exhausted through the exhaust hole.

[0008] Furthermore, the manufacturing method described in claim 3 is the manufacturing method described in claim 1, wherein the reflective device comprises a partition member that divides the internal space into a plurality of parts while reinforcing the reflective device, the partition member having a communication hole that connects the plurality of partitioned internal spaces to each other, and by performing the mounting step, the internal space of the reflective device is divided into a plurality of parts by the partition member.

[0009] Furthermore, in the manufacturing method described in claim 4, in the manufacturing method described in claim 3, only one exhaust hole is provided at a predetermined position on the base member.

[0010] Furthermore, the manufacturing method described in claim 5 further includes, in the manufacturing method described in claim 1, a blocking step of closing the exhaust hole after the mounting step. [Effects of the Invention]

[0011] The manufacturing method described in claim 1 includes a mounting step of attaching a reflective member having a reflective mechanism to a flat base member that forms the back side of the reflective device, and in the mounting step, the air in the internal space is exhausted through the exhaust hole, so that the pressure of the air inside the internal space during the mounting of the reflective member can be kept constant, for example, so that deformation of the reflective mechanism can be prevented and the reflective device can be manufactured properly.

[0012] According to the manufacturing method described in claim 2, since an amount of air corresponding to the reduced volume of the internal space of the reflector is exhausted through the exhaust port, for example, the pressure of the air inside the internal space can be kept constant when the reflective member is installed, so deformation of the reflective mechanism and the like can be prevented, and the reflector can be manufactured properly.

[0013] According to the manufacturing method described in claim 3, the device is equipped with a partition member that divides the internal space into multiple sections while reinforcing the reflective device, and the partition member has communication holes that connect the multiple internal spaces to each other. As a result, for example, the pressure of the air inside the multiple internal spaces can be kept constant when the reflective member is installed, and the reflective device can be reinforced, thereby preventing deformation of the reflective mechanism and making it possible to manufacture the reflective device appropriately.

[0014] According to the manufacturing method described in claim 4, since only one exhaust hole is provided at a predetermined position on the base member, the structure of the base member can be made relatively simple, for example, and thus the manufacturing cost of the reflector can be reduced.

[0015] According to the manufacturing method described in claim 5, by including a blocking step of blocking the exhaust holes, for example, it becomes possible to prevent foreign matters such as dust and insects from entering the internal space from the outside through the exhaust holes.

Brief Description of the Drawings

[0016] [Figure 1] It is a diagram showing an installation example of a sensor and a reflection device according to the present embodiment. [Figure 2] It is a diagram showing the reflection device in an assembled state. [Figure 3] It is a diagram showing the reflection device in an assembled state. [Figure 4] It is a diagram showing the reflection device in an assembled state. [Figure 5] It is a diagram showing the reflection device in an assembled state. [Figure 6] It is a diagram showing the base member and the reflection member in a mutually separated state before assembly. [Figure 7] It is a diagram showing the base member and the reflection member in a mutually positioned state. [Figure 8] It is an explanatory diagram of the assembly method. [Figure 9] It is an explanatory diagram of the assembly method. [Figure 10] It is a diagram showing the reflection device in an assembled state. [Figure 11] It is a diagram showing the reflection device in an assembled state.

Embodiments for Carrying Out the Invention

[0017] Hereinafter, embodiments of the manufacturing method according to the present invention will be described in detail based on the drawings. Note that the present invention is not limited by this embodiment.

[0018] 〔Basic Concepts of the Embodiment〕 First, the basic concepts of the present embodiment will be explained. The present embodiment is generally related to a manufacturing method.

[0019] "Manufacturing method" refers to the method of manufacturing the reflective device.

[0020] A "reflecting device" is a device that reflects the emitted light from a sensor back onto the sensor.

[0021] A "detector" is a system that detects abnormalities in a target area, such as a device that detects fires.

[0022] The "target area" is the area in which anomalies are detected, and is a concept that includes, for example, a predetermined area indoors or outdoors, and is a concept that includes any area such as a room in a building or a parking space in a parking lot.

[0023] [Specific details of the embodiment] Next, the specific details of the embodiment will be described.

[0024] (composition) First, the configuration of the sensor and reflector according to this embodiment will be described. Figure 1 shows an example of the installation of the sensor and reflector according to this embodiment, and Figures 2 to 5 show the reflector in its assembled state. Note that components that are not actually visible in each figure are shown with dashed lines for the sake of explanation.

[0025] Furthermore, Figure 2 is a front view of the reflector 2 (viewed from left to right in Figure 1), Figure 3 is a rear view (viewed from right to left in Figure 1), Figure 4 is a side view (viewed from bottom to top in Figure 2), and Figure 5 is a cross-sectional view taken from the direction of arrow AA in Figure 2. Note that, for the sake of explanation, shapes visible behind the line of sight have been omitted in each cross-sectional view.

[0026] Furthermore, in each figure, the X, Y, and Z axes are assumed to be mutually orthogonal, and with the reflector 2 as the reference, the -X side is also referred to as the front side, the +X side as the back side, and the Y-axis and Z-axis directions as the side sides.

[0027] Furthermore, in this embodiment, we will describe the case in which the sensor 1 and the reflector 2 are installed on the wall surface of the room that is the target area.

[0028] (Configuration-sensor) Detector 1 in Figure 1 is a dimming reflective type detector that monitors the generation of smoke in a target area and detects a fire. Detector 1 is installed, for example, opposite a reflector 2, and emits light (outgoing light) to the reflector 2. Detector 1 receives the light (reflected light) reflected by the reflector 2 and monitors the generation of smoke based on the decrease in the amount of light from the outgoing light to the amount of light from the received light, thereby detecting a fire.

[0029] (Configuration-Reflector) The reflector 2 in Figure 1 is a device that reflects the light output from the sensor 1 and reaching the reflector 2 back towards the sensor 1.

[0030] The reflective device 2 comprises, for example, a base member 21, a reflective member 22, and an internal space 23 as shown in Figures 2 to 5.

[0031] (Configuration - Reflector - Base Member) Figure 6 shows the base member and reflective member in their separate state before assembly, and Figure 7 shows the base member and reflective member in their positioned state. Figures 6 and 7 are cross-sectional views of the cross-section corresponding to Figure 5 (the same applies to the other cross-sectional views).

[0032] The base member 21 in Figures 2 to 7 is a flat plate-shaped member that forms the back side (+X) of the reflector 2, and is a member for attaching the reflector 2 to a mounting surface such as a wall in Figure 1. The base member 21 is a rectangular member formed from any material such as resin.

[0033] The base member 21 has, for example, an exhaust port 211 (Figures 6 and 7).

[0034] The exhaust port 211 is a hole for exhausting air from the internal space 23 (Figure 7) during the assembly of the reflector 2, and is a through-hole provided at a predetermined position in the base member 21. This exhaust port 211 is eventually sealed by blocking material 211A, for example, as shown in Figure 5.

[0035] (Configuration - Reflector - Reflective component) The reflective members 22 shown in Figures 2 to 7 are members that form the front side (-X) and the side sides (Y-axis direction, Z-axis direction) of the reflective device 2.

[0036] The reflective member 22 has, for example, a front portion 221, a side portion 222, a welded rib 223, and a reflective mechanism 224.

[0037] (Configuration - Reflecting device - Reflecting member - Front view) The front portion 221 in Figures 2 and 5 is the part that surrounds the internal space 23 of the reflector 2 from the front side (-X), and is a part that allows light to pass through to the interior (i.e., is transmissive), and is formed of any material such as resin. The front portion 221 is a rectangular part in a front view, as shown in Figure 2, for example.

[0038] (Configuration - Reflecting device - Reflecting member - Side section) The side sections 222 in Figures 2 and 5 surround the internal space 23 of the reflector 2 from the sides (Y-axis direction, Z-axis direction) and consist of four parts (the +Y, -Y, +Z, and -Z sections in Figure 2) that are continuous and integral with the four sides of the front section 221, and are formed from the same material as the front section 221. The shape of the four front sections 222 is the same rectangular shape as the rectangular side sections 222 shown in Figure 4. As a variation, the side sections 222 and the front section 221 may be formed from separate materials and connected to each other.

[0039] (Configuration - Reflector - Reflective material - Welded rib) The welded ribs 223 in Figures 6 and 7 are fixing members for securing the side portions 222 of the reflective member 22 to the base member 21. Before assembly of the reflective device 2, these ribs are provided so as to protrude from the ends (+X) of the four side portions 222. The welded ribs 223 are provided continuously across the entire ends (+X) of the four side portions 222. As shown in Figure 7, the welded ribs 223 are provided between the side portions 222 and the base member 21.

[0040] The material of the welded rib 223 is arbitrary, but for example, any material can be used that melts to fix the side portion 222 and the base member 21 to each other. In this embodiment, for example, assuming that it will be fixed by ultrasonic welding, it is formed from the same material as the side portion 222 (for example, resin) so that it can be fixed by melting with the heat generated by ultrasonic vibrations and load transmitted from the front side (-X) in Figure 7 toward the back side (+X direction) by an ultrasonic welding machine (not shown). As a variation, the side portion 222 and the welded rib 223 may be formed from different materials.

[0041] (Configuration - Reflecting device - Reflecting member - Reflecting mechanism) The reflective mechanism 224 in Figure 5 is an element for reflecting the emitted light from the sensor 1 in Figure 1 back toward the sensor 1, and is provided, for example, on the rear side (+X) of the front portion 221. The reflective mechanism 224 is, for example, an element that functions as a reflective mirror having a so-called corner cube structure. As a variation, any structure other than a corner cube structure may be adopted as long as it can reflect light in a predetermined direction.

[0042] (Configuration - Reflector - Reflective component) The internal space 23 in Figure 5 is a roughly rectangular column-shaped space surrounded by the base member 21, four side sections 222, and the front section 221. More specifically, since the welded ribs 223 shown in Figure 7 exist before the assembly of the reflector 2 is completed, the internal space 23 can be said to be a roughly rectangular column-shaped space surrounded by the base member 21, four side sections 222, welded ribs 223, and the front section 221.

[0043] (Assembly Instructions) Next, the assembly method (i.e., manufacturing method) of the reflector 2 will be explained. Figures 8 to 10 are explanatory diagrams of the assembly method. Figures 8 to 9 are cross-sectional views corresponding to Figure 5, etc.

[0044] Here, for example, the base member 21 and reflective member 22 shown in Figure 6 are pre-installed in a mutually separated state, and the assembly process will be explained using these as an example.

[0045] In this assembly method, the installation process and the closure process are performed sequentially.

[0046] (Assembly Method - Installation Process) The mounting process is the process of attaching the reflective member 22 to the base member 21, and for example, has the following first and second steps.

[0047] ===Step 1=== First, in the first step, the reflective member 22 is positioned relative to the base member 21 in Figure 6. Here, for example, as shown in Figure 7, the exhaust hole 211 is positioned inside the side portion 222 of the reflective member 22.

[0048] In this case, as mentioned above, the welded rib 223 in Figure 7 is provided continuously over the entire end (+X) of the four side portions 222, and since the welded rib 223 is in contact with the base member 21, the internal space 23 in Figure 7 (a roughly rectangular column-shaped space surrounded by the base member 21, the four side portions 222, the welded rib 223, and the front portion 221) is sealed except for the exhaust hole 211. In other words, the air inside the internal space 23 can be exhausted only through the exhaust hole 211.

[0049] ===Step 2=== Next, in the second step, the reflective member 22 is fixed and attached to the base member 21 by melting the welding rib shown in Figure 7.

[0050] Here, for example, using an ultrasonic welding machine (not shown), ultrasonic vibrations and load are transmitted to the reflective member 22 from the front side (-X) to the back side (+X direction), as indicated by the white arrow in Figure 8, thereby melting the welding rib 223 with heat and fixing it with the melted welding rib 223.

[0051] In this case, as shown in Figure 9, the reflective member 22 moves to the back side (+X) by an amount corresponding to the size of the welded rib 223 in Figure 8, and the reflective member 22 is fixed and attached to the base member 21. In reality, some of the melted welded rib 223 remains and hardens between the end (+X) of the side portion 222 and the base member 21, or remains and hardens around the connection part (the fixed and connected part) between the end of the side portion 222 and the base member 21. However, for the sake of explanation, the elements corresponding to these melted and hardened welded ribs (i.e., the elements corresponding to the welded ribs that mutually fix the end (+X) of the side portion 222 and the base member 21) are not shown in each figure.

[0052] Furthermore, when the reflective member 22 moves to the rear side (+X) by an amount corresponding to the size of the welded rib 223 in Figure 8, the volume of the internal space 23 decreases by an amount corresponding to the size of the welded rib 223 (i.e., an amount corresponding to, for example, a part 230 of the internal space 23 in Figure 8). However, since the air inside the internal space 23 is exhausted through the exhaust hole 211, it is possible to maintain a constant pressure due to the air inside the internal space 23 before and after the movement of the reflective member 22.

[0053] Therefore, changes in air pressure inside the internal space 23 during the installation process (for example, an increase in pressure) prevent unintended external forces from being applied to the reflective mechanism 224 and the front portion 221, etc., and prevent deformation of the reflective mechanism 224, etc., thereby enabling the reflective device 2 to be manufactured appropriately and to reflect the emitted light (Figure 1) in the intended direction.

[0054] (Assembly method - closure process) The blocking process is the process of blocking the exhaust port 211 shown in Figure 9, which takes place after the installation process.

[0055] Here, for example, a welding rib is provided in the exhaust hole 211 that does not completely block the exhaust hole 211, and the welding rib is melted by heat welding to block the exhaust hole 211. This seals the internal space 23. It is desirable that the welding rib be integrally molded from the same material as the base member 21 in order to simplify the process. Alternatively, the exhaust hole 211 may be blocked by providing a sealing material 211A (Figure 5) made of a predetermined resin material (for example, a thermoflexible resin material or an ultraviolet curable resin material) or a predetermined adhesive in the exhaust hole 211.

[0056] (Reflection of emitted light) Next, we will explain the reflection of light by the reflector 2.

[0057] The emitted light from the sensor 1 in Figure 1 is irradiated onto the front portion 221, passes through the front portion 221, and is reflected back to the front side (-X side) by the reflection mechanism 224, reaching the sensor 1 in Figure 1 as reflected light.

[0058] (Effects of the embodiment) As described above, according to this embodiment, the mounting process includes attaching a reflective member 22 having a reflective mechanism 224 to a flat base member 21 that forms the back side (+X) of the reflective device 2. In the mounting process, the air in the internal space 23 is exhausted through the exhaust hole 211. For example, the pressure of the air inside the internal space 23 during the mounting of the reflective member 22 can be kept constant, thereby preventing deformation of the reflective mechanism 224 and other components, and enabling the proper manufacture of the reflective device 2.

[0059] Furthermore, because an amount of air corresponding to the reduced volume of the internal space of the reflector 2 is exhausted through the exhaust port 211, the pressure of the air inside the internal space 23 can be kept constant, for example, when the reflector member 22 is installed. This prevents deformation of the reflector mechanism 224, etc., and makes it possible to manufacture the reflector 2 properly.

[0060] Furthermore, since only one exhaust port 211 is provided at a predetermined position on the base member 21, the structure of the base member 21 can be made relatively simpler, for example, which makes it possible to reduce the manufacturing cost of the reflector 2.

[0061] Furthermore, by including a blocking process to close the exhaust port 211, it becomes possible to prevent foreign matter such as dust and insects from entering the internal space 23 from the outside through the exhaust port 211.

[0062] [Modifications of the embodiment] While embodiments of the present invention have been described above, the specific configurations and means of the present invention can be arbitrarily modified and improved within the scope of the technical idea of ​​each invention described in the claims. Such modifications will be described below.

[0063] (Regarding the problems to be solved and the effects of the invention) First, the problems that the invention aims to solve and the effects of the invention are not limited to those described above, and may vary depending on the implementation environment and details of the invention's configuration. In some cases, only a portion of the problems described above may be solved, or only a portion of the effects described above may be achieved.

[0064] (Regarding decentralization and integration) Furthermore, the above-described configuration is a functional concept and does not necessarily require that the physical structure be as shown in the diagram. In other words, the specific forms of distribution and integration of each part are not limited to those shown in the diagram, and all or part of them can be functionally or physically distributed or integrated in any unit.

[0065] (Regarding the occlusion process) Furthermore, in the assembly method described in the above embodiment, the blocking step may be omitted. That is, the reflector 2 may be constructed using the base member 21 in a state where the exhaust port 211 is not blocked. Alternatively, the exhaust port 211 may be blocked by attaching a material that does not allow insects, dust, or water droplets to pass through but does allow water vapor to pass through, such as a porous membrane.

[0066] (Regarding the exhaust vent) Furthermore, although the above embodiment described the case in which only one exhaust port 211 is provided in the base member 21 of Figure 2, it is not limited to this. For example, two or more exhaust ports 211 may be provided, or the position of the exhaust port 211 may be changed as desired.

[0067] (Regarding welded ribs) Furthermore, although the above embodiment describes a case in which the reflective member 22 is attached to the base member 21 by ultrasonic welding using welding ribs 223 that are pre-provided on the reflective member 22, the invention is not limited to this. For example, the welding ribs 223 may be omitted, and the member may be attached using known attachment means (such as adhesive).

[0068] (Regarding partition members) Figures 10 and 11 show the assembled reflective device. Figures 10 and 11 correspond to Figures 2 and 5. Figure 11 is a cross-sectional view taken from the direction of arrow BB in Figure 10.

[0069] The reflective device 3 shown in Figures 10 and 11 may be constructed by adding a partition member to the reflective device 2 shown in Figures 2 and 5 of the above embodiment. The reflective device 3 is the reflective device 2 described in the embodiment with the addition of a partition member 41.

[0070] ===Structure=== The partition member 41 is a member that separates multiple internal spaces (first internal space 33A and second internal space 33B) from one another, and is also a rectangular flat plate member that supports the front portion 321 (Figure 11) of the reflective member 32 with respect to the base member 21, thereby reinforcing the reflective device 3.

[0071] The partition member 41 has, for example, one end (-X) that is pre-fixed to the front portion 321 of the reflective member 32. In other words, the partition member 41 is, for example, an element that is pre-integrated with other elements of the reflective member 32.

[0072] Before assembly, the partition member 41 has a welding rib on the other end (+X) that has a configuration similar to the welding rib 223 in Figures 6 and 7, and is configured to be fixed and attached to the base member 21 by this welding rib.

[0073] The partition member 41 has a communication hole 411 (Figure 11). The communication hole 411 is a through hole that connects the first internal space 33A and the second internal space 33B to each other.

[0074] ===Assembly Instructions=== Next, we will explain how to assemble the reflector 3.

[0075] In this assembly method, the mounting process and the blocking process are performed sequentially. The assembly method for the reflector 3 is basically the same as that for the reflector 2, and the main differences will be explained.

[0076] In the installation process, the reflective member 32 is attached to the base member 21, and in this case, the partition member 41, which is a component of the reflective member 32, is also attached.

[0077] Specifically, the reflective member 32 is positioned relative to the base member 21, and the reflective member 32 is fixed and attached to the base member 21 by melting each welding rib.

[0078] The blocking process is the same as the process described in the embodiment.

[0079] ===Prevention of deformation of the reflection mechanism=== Similar to the case described in the "second step" of the mounting process for the assembly method of the reflector 2 of the embodiment, when the welding rib is melted and fixed in the above mounting process, the reflector 32 moves to the rear side (+X) by an amount corresponding to the size of the welding rib, so the volume of the first internal space 33A and the second internal space 33B decreases by the amount of this movement. In this case, the air inside the first internal space 33A is exhausted through the exhaust hole 211, and the air inside the second internal space 33B is exhausted through the communication hole 411, the first internal space 33A, and the exhaust hole 211, so that the pressure of the air inside the first internal space 33A and the second internal space 33B can be kept constant before and after the movement of the reflector 32.

[0080] Therefore, changes in air pressure inside the first internal space 33A and the second internal space 33B during the installation process (for example, an increase in pressure) prevent unintended external forces from being applied to the reflective mechanism 324 and the front portion 321, etc., and prevent deformation of the reflective mechanism 324, etc., thereby enabling the reflective device 3 to be manufactured appropriately and to reflect the emitted light (Figure 1) in the intended direction.

[0081] Furthermore, the front portion 321 on which the reflective mechanism 324 is provided is supported by the partition member 41 against the base member 21, reinforcing the reflective device 3. This suppresses deflection of the front portion 321, preventing deformation of the reflective mechanism 324, etc., and thus enabling the emitted light (Figure 1) to be reflected in the intended direction.

[0082] ===As variations=== Furthermore, while Figures 10 and 11 illustrate the case where only one partition member 41 is provided, the design is not limited to this. In a plan view, two partition members may be provided so as to be mutually orthogonal to each other to divide the four internal spaces, or three or more partition members may be provided. In the above case, it is preferable that each internal space communicates with one or more other internal spaces via communication holes, and that any internal space that does not have a waste hole 211 communicates with the exhaust hole 211 via one or more communication holes and one or more other internal spaces.

[0083] (Regarding the features) Furthermore, the features of the above embodiments and the features of the modified embodiments may be combined in any way.

[0084] (Note) The manufacturing method described in Appendix 1 is a method for manufacturing a reflector that reflects emitted light from a sensor back to the sensor, and includes a mounting step of attaching a reflective member that forms the front and side sides of the reflector, which has a reflective mechanism for reflecting the emitted light, to a flat base member that forms the back side of the reflector, wherein the reflective member has a front portion that surrounds the internal space of the reflector from the front side and a side portion that surrounds the internal space of the reflector from the side side, the base member surrounds the internal space of the reflector from the back side, the base member has an exhaust hole for exhausting air from the internal space, and in the mounting step, the air in the internal space is exhausted through the exhaust hole.

[0085] The manufacturing method described in Appendix 2 is the manufacturing method described in Appendix 1, wherein a fixing material is provided between the side portion of the reflective member and the base member, and in the mounting step, the reflective member is attached to the base member by melting the fixing material, and when the fixing material is melted, the volume of the internal space of the reflective device decreases, and an amount of air corresponding to the decreased volume of the internal space of the reflective device is exhausted through the exhaust hole.

[0086] The manufacturing method described in Appendix 3 is the manufacturing method described in Appendix 1, wherein the reflective device includes a partition member that divides the internal space into a plurality of parts while reinforcing the reflective device, the partition member has a communication hole that connects the plurality of partitioned internal spaces to each other, and by performing the mounting step, the internal space of the reflective device is divided into a plurality of parts by the partition member.

[0087] The manufacturing method described in Appendix 4 is the manufacturing method described in Appendix 3, wherein only one exhaust hole is provided at a predetermined position on the base member.

[0088] The manufacturing method described in Appendix 5 further includes, in the manufacturing method described in Appendix 1, a blocking step of closing the exhaust hole after the mounting step.

[0089] (Effect of the note) The manufacturing method described in Appendix 1 includes a mounting step of attaching a reflective member having a reflective mechanism to a flat base member that forms the back side of the reflective device. In the mounting step, the air in the internal space is exhausted through the exhaust hole. For example, the pressure of the air inside the internal space during the mounting of the reflective member can be kept constant, thereby preventing deformation of the reflective mechanism and enabling the proper manufacture of the reflective device.

[0090] According to the manufacturing method described in Appendix 2, an amount of air corresponding to the reduced volume of the internal space of the reflector is exhausted through the exhaust port. For example, the pressure of the air inside the internal space can be kept constant when the reflective member is installed, thus preventing deformation of the reflective mechanism and enabling the proper manufacture of the reflector.

[0091] According to the manufacturing method described in Appendix 3, the device is equipped with a partition member that divides the internal space into multiple sections while reinforcing the reflective device, and the partition member has communication holes that connect the multiple internal spaces to each other. As a result, for example, the pressure of the air inside the multiple internal spaces can be kept constant when the reflective member is installed, and the reflective device can be reinforced, thereby preventing deformation of the reflective mechanism and making it possible to manufacture the reflective device appropriately.

[0092] According to the manufacturing method described in Appendix 4, since only one exhaust port is provided at a predetermined position on the base member, the structure of the base member can be made relatively simple, for example, and thus the manufacturing cost of the reflector can be reduced.

[0093] According to the manufacturing method described in Appendix 5, by including a blocking step to close the exhaust port, it becomes possible to prevent foreign matter such as dust and insects from entering the internal space from the outside through the exhaust port. [Explanation of Symbols]

[0094] 1 sensor 2 Reflector 3 Reflector 21 Base member 22 Reflective material 23 Interior space 32 Reflective material 33A 1st internal space 33B 2nd internal space 41 Partition Member 211 Exhaust port 211A Occlusion material 221 Front view 222 Side part 223 Welded Ribs 224 Reflection mechanism 230 part 324 Reflection mechanism 411 Communication hole

Claims

1. A method for manufacturing a reflecting device that reflects emitted light from a sensor back to the sensor, The process includes attaching a reflective member, which forms the front and side sides of the reflector, to a flat base member that forms the back side of the reflector, and which has a reflective mechanism for reflecting the emitted light, The reflective member is The front portion surrounds the internal space of the reflective device from the front side, The reflective device has a side portion that surrounds the internal space from the side, The base member surrounds the internal space of the reflector from the rear side. The base member is provided with an exhaust port for exhausting the air from the internal space. In the installation process, the air in the internal space is exhausted through the exhaust port. Manufacturing method.

2. A fixing member is provided between the side surface of the reflective member and the base member. In the aforementioned mounting process, the reflective member is attached to the base member by melting the fixing material. When the fixing material is melted, the volume of the internal space of the reflector decreases. An amount of air corresponding to the reduced volume of the internal space of the reflector is exhausted through the exhaust port. The manufacturing method according to claim 1.

3. The reflective device includes a partition member that divides the internal space into multiple sections while reinforcing the reflective device, The partition member has communication holes that connect the internal spaces, which are divided into multiple sections, By performing the above installation step, the internal space of the reflector is divided into multiple sections by the partition members. The manufacturing method according to claim 1.

4. The exhaust port is provided at a predetermined position on the base member, The manufacturing method according to claim 3.

5. A blocking step of closing the exhaust hole, following the aforementioned mounting step, further including, The manufacturing method according to claim 1.

Images