Embedded plate

Abstract

To provide an embedded plate that is easy to install.SOLUTION: An embedding plate has: a first plate that is attached to an existing embedding hole; a second plate that is arranged opposite the first plate; and an attachment spring that is attached to the second plate, and engaged in a notch part provided in the first plate. In a direction in which the first plate and the second plate face each other, a force with which the attachment spring lifts the second plate is smaller than a weight of the first plate minus a static friction force between the attachment spring and the notch part.SELECTED DRAWING: Figure 13

Description

[Technical Field]

[0001] The present disclosure relates to an embedding plate that is fixed to an embedding hole in a ceiling member. [Background technology]

[0002] Patent Document 1 discloses a recessed plate that is fixed to a recessed hole formed in a ceiling member. The recessed plate is designed to enable lighting fixtures of different sizes to be recessed in recessed holes formed in a mounting portion such as a ceiling. The recessed plate described in Patent Document 1 has an inner plate that is placed on the back side of the ceiling member and an outer plate that is placed on the decorative side of the ceiling member. The inner plate and the outer plate clamp the ceiling member using a mounting spring, thereby fixing the recessed plate to the ceiling member.

[0003] When installing the recessed plate, the inner plate is passed through the recessed hole with the mounting spring attached to the outer plate hooked. At this time, the inner plate is pulled up with a finger placed in the ceiling space, and the mounting spring is held at a length equal to or greater than the thickness of the ceiling material. Then, with the outer plate pushed up by a finger or the like and in contact with the ceiling material, the inner plate is pulled down so that it is drawn into the ceiling material. As a result, the ceiling material is sandwiched between the inner plate and the outer plate, and the inner plate and outer plate are fixed to the ceiling material, completing the installation of the recessed plate. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Japanese Patent Application Laid-Open No. 2010-073480 Summary of the Invention [Problem to be solved by the invention]

[0005] With the embedded plate of Patent Document 1, if there is no hole in the ceiling space for a finger to pass through during installation, it is difficult to pull up and down the inner plate using the spring. Also, when pulling the inner plate into the ceiling member, it is necessary to insert a finger into the opening in the embedded plate and install it without being able to see what is happening in the ceiling space, which makes installation difficult.

[0006] The present disclosure aims to provide an embedding plate that is easy to install. [Means for solving the problem]

[0007] The embedded plate of the present disclosure comprises a first plate that is attached to an existing embedded hole, a second plate that is arranged opposite the first plate, and an attachment spring that is attached to the second plate and engaged with a notch provided in the first plate, and in the direction in which the first plate and the second plate face each other, the force with which the attachment spring pulls up the second plate is smaller than the weight of the first plate minus the static friction force between the attachment spring and the notch. [Effects of the Invention]

[0008] According to the embedded plate of the present disclosure, the force with which the mounting spring engaged with the first plate pulls up the second plate is adjusted so that the mounting spring does not push up the first plate and cause it to float up from the ceiling member, making it easy to install the embedded plate. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view of an embodiment of the present disclosure with an embedding plate attached; [Figure 2] FIG. 2 is a top perspective view of an embedding plate according to an embodiment of the present disclosure. [Figure 3] FIG. 2 is a perspective view of an embedding plate according to an embodiment of the present disclosure, viewed from below. [Figure 4]4 is a perspective view of the underside of the embedding plate according to the embodiment of the present disclosure, seen from a different direction than that of FIG. 3. FIG. [Figure 5] FIG. 1 is an exploded perspective view of an embedding plate according to an embodiment of the present disclosure. [Figure 6] FIG. 2 is a schematic side view of an embedding plate according to an embodiment of the present disclosure. [Figure 7] FIG. 2 is a perspective view of a first plate according to an embodiment of the present disclosure. [Figure 8] FIG. 2 is a top view of a first plate according to an embodiment of the present disclosure. [Figure 9] FIG. 2 is a perspective view of a second plate according to an embodiment of the present disclosure. [Figure 10] 10A to 10C are perspective views illustrating a procedure for attaching an embedding plate according to an embodiment of the present disclosure. [Figure 11] FIG. 2 is a perspective view illustrating a state in which a second plate of the embedding plate according to the embodiment of the present disclosure is attached. [Figure 12] FIG. 10 is a perspective view illustrating a state in which the embedding plate according to the embodiment of the present disclosure has been completely attached. [Figure 13] 5A and 5B are schematic diagrams illustrating the force relationship in the embedding plate according to the embodiment of the present disclosure. [Figure 14] FIG. 1 is an exploded perspective view illustrating an application example of an embedding plate according to an embodiment of the present disclosure. [Figure 15] FIG. 10 is a perspective view of an embedding plate according to a modified example of the embodiment of the present disclosure, viewed from above. [Figure 16] FIG. 10 is a perspective view of an embedding plate according to a modified example of an embodiment of the present disclosure, as viewed from below. [Figure 17] 17 is a perspective view of the underside of an embedding plate according to a modified example of the embodiment of the present disclosure, seen from a direction different from that of FIG. 16. FIG. [Figure 18] FIG. 10 is an exploded perspective view showing an application example of an embedding plate according to a modified example of an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0010] The embodiments of the present disclosure will be described with reference to the accompanying drawings. In each drawing, identical or corresponding parts are designated by the same reference numerals, and redundant descriptions are appropriately simplified or omitted. In the following description, for convenience, the positional relationship of each structure may be expressed based on the illustrated state. Note that the present disclosure is not limited to the following embodiments, and any combination of the embodiments, any modification of any component of each embodiment, or any omission of any component of each embodiment are possible within the scope of the present disclosure. Furthermore, in each drawing, the dimensional relationships and shapes of each component may differ from the actual ones. Furthermore, the positional relationships between each component, such as the vertical relationship, are, in principle, those when installed in a usable state.

[0011] Embodiment 1 <Recessed plate 1> Fig. 1 is a perspective view of an attached embedding plate 1 according to an embodiment of the present disclosure. As shown in Fig. 1, the embedding plate 1 is used when embedding a lighting fixture 10 (see Fig. 14) for renovation into an existing embedding hole H. The embedding hole H is an opening formed in a ceiling member C that will be the mounting portion of the lighting fixture 10.

[0012] In the following description, the direction from the ceiling member C toward the back side of the ceiling member C is referred to as the upward direction, and the direction from the ceiling member C toward the room is referred to as the downward direction. The upward direction may be referred to as the +Z direction, and the downward direction may be referred to as the -Z direction. Furthermore, the direction along the longitudinal direction of the recessed hole H will be referred to as the X direction, and the direction along the lateral direction of the recessed hole H will be referred to as the Y direction.

[0013] When attached to the ceiling member C, the embedding plate 1 has a rectangular shape with a pair of sides extending along the X direction and a pair of sides extending along the Y direction. In the embedding plate 1, the distance Y1 (see FIG. 2) between the two sides extending along the X direction is greater than the width W of the embedding hole H in the Y direction. This allows the first plate 101 to be placed above the ceiling member C.

[0014] FIG. 2 is a perspective view of an embedding plate 1 according to an embodiment of the present disclosure, as seen from above. FIG. 3 is a perspective view of an embedding plate 1 according to an embodiment of the present disclosure, as seen from below. FIG. 4 is a perspective view of an embedding plate 1 according to an embodiment of the present disclosure, as seen from below, in a direction different from that of FIG. 3. FIG. 5 is an exploded perspective view of an embedding plate 1 according to an embodiment of the present disclosure. FIG. 6 is a schematic side view of an embedding plate 1 according to an embodiment of the present disclosure. FIG. 7 is a perspective view of a first plate 101 according to an embodiment of the present disclosure. FIG. 8 is a top view of the first plate 101 according to an embodiment of the present disclosure. FIG. 9 is a perspective view of a second plate 102 according to an embodiment of the present disclosure.

[0015] 2 to 9, the embedded plate 1 includes a first plate 101, a second plate 102, and an attachment spring 103. The first plate 101 is a portion that is disposed on the upper back side of the ceiling member C, and has, for example, a rectangular shape. The first plate 101 has a first main body portion 111 and a mounting portion 121.

[0016] The first main body 111 is a flat member. When the embedded plate 1 is attached to the attachment portion, the first main body 111 is arranged so that one surface faces the −Z direction, which is the interior of the room, and the other surface faces the +Z direction, which is the direction toward the back side of the ceiling member C on the opposite side of the room.

[0017] The mounting portion 121 is one step lower in the −Z direction when the embedded plate 1 is attached to the mounting portion, and is the portion that is placed on the ceiling member C. The mounting portion 121 extends in the −Z direction intersecting with one surface of the first main body portion 111 at two sides extending along the X direction, and is bent outward in the Y direction at the ends.

[0018] An anti-slip packing 15 is attached to the mounting portion 121. The anti-slip packing 15 restricts movement of the embedding plate 1 in a direction along the ceiling member C, and also closes the gap between the embedding plate 1 and the ceiling member C.

[0019] The first main body portion 111 is provided with a first opening 131 and a notch 141. The first opening 131 is, for example, circular and is formed in the center of the first main body portion 111. The first opening 131 is a portion through which the mounting spring 103 is inserted when the embedded plate 1 is attached. A lighting fixture 11 (see FIG. 14) different from the lighting fixture 10 for renewal may be attached to the first opening 131.

[0020] The notch 141 is a portion on which the mounting spring 103 inserted through the first opening 131 is hooked. The notch 141 is continuous with the peripheral edge of the first opening 131 and has a shape in which a portion of the peripheral edge of the first opening 131 is cut away. The notch 141 has a shape in which a rectangular shape extending tangentially to the first opening 131 is integrated with semicircular arc shapes provided at both ends. The dimension X1 of the notch 141 in the major axis direction is smaller than the distance R between the opposing peripheral edges of the first opening 131. The notch 141 is provided, for example, at two opposing locations on the peripheral edge of the first opening 131. The notch 141 is provided, for example, at a position closest to the mounting portion 121 on the peripheral edge of the first opening 131.

[0021] The portion of the cutout 141 that continues to the first opening 131 is a pair of hooking edges 141a. The distance X2 between the pair of hooking edges 141a is smaller than the dimension X1 of the cutout 141 in the longitudinal direction, and the pair of hooking edges 141a prevents the mounting spring 103 hooked on the cutout 141 from coming off toward the first opening 131.

[0022] It should be noted that notch 141 may not be continuous with first opening 131. In other words, notch 141 and first opening 131 may be provided separately. In this case, notch 141 may have the function of hooking mounting spring 103, and first opening 131 may have the function of attaching a lighting fixture 11 that is different from lighting fixture 10 for renewal. Also, first opening 131 may be formed of a plurality of first openings 131, and for example, only some of the plurality of first openings 131 may be continuous with notch 141.

[0023] The second plate 102 is a portion disposed on the design side of the ceiling component C, and is, for example, rectangular. The second plate 102 has, for example, roughly the same shape as the first plate 101. The second plate 102 has, for example, a larger area than the first plate 101, which prevents the space above the ceiling from being exposed.

[0024] The second plate 102 has a flat plate shape and has a second opening 112 in the center. The second opening 112 is an opening into which, for example, a lighting fixture 11 (see FIG. 14 ) different from the lighting fixture 10 for renovation is attached. The second plate 102 is positioned so that, when the embedded plate 1 is attached to the ceiling member C, one surface of the second plate 102 faces the interior of the room and the other surface faces toward the ceiling member C. One surface of the second plate 102 is a surface that becomes the design surface of the embedded plate 1. The other surface of the second plate 102 is a surface that faces one surface of the first main body portion 111 of the first plate 101.

[0025] The mounting spring 103 is attached to the other surface of the second plate 102. The mounting spring 103 is, for example, a V-spring. The mounting spring 103 is formed by bending an elastic member such as a spring steel plate. The mounting spring 103 has the function of pulling the second plate 102 toward the first plate 101. The mounting spring 103 is hooked into the notch 141 of the first plate 101 when the embedded plate 1 is attached to the ceiling member C. The mounting spring 103 is inserted into the first opening 131 of the first plate 101 and slides into the notch 141 along the periphery of the first opening 131 to be accommodated in the notch 141. The dimension X1 of the notch 141 in the major axis direction is smaller than the distance R between the opposing peripheries of the first opening 131, making it easy to hook the mounting spring 103 into the notch 141.

[0026] The mounting spring 103 has a ring portion 113 around which an elastic member is wound in a circular shape, and a pair of arms 123 extending in a V-shape from the ring portion 113. The ring portion 113 is a portion that connects the bases of the pair of arms 123 together. The ring portion 113 has an elastic force that acts in a direction that opens the pair of arms 123.

[0027] The pair of arms 123 extend continuously from both ends of the elastic member that constitutes the ring portion 113. The pair of arms 123 are shaped so that the ring portion 113 is disposed on the minor angle side of the V shape.

[0028] Each of the pair of arm portions 123 has a sliding portion 123a and a tip portion 123b. The sliding portion 123a is a portion that continues from both end portions of the ring portion 113. The sliding portion 123a is a portion that comes into contact with and slides along the periphery of the notch portion 141 when the pair of arm portions 123 of the mounting spring 103 housed in the notch portion 141 move in the opening direction.

[0029] The sliding portion 123a is bent, for example, by 30 degrees at the fulcrum P toward the reflex angle side of the V-shape of the pair of arms 123. Because the sliding portion 123a is bent at the fulcrum P, when the pair of arms 123 move in the opening direction, the force acting on the periphery of the notch portion 141 becomes more constant, and the sliding movement of the pair of arms 123 becomes smoother. Note that the sliding portion 123a may be configured not to have the fulcrum P and to extend linearly from the ring portion 113.

[0030] The tip portion 123b is a portion that is located at the tip of the sliding portion 123a and that extends outward, for example, by bending 90 degrees, toward the reflex angle side of the V-shape of the pair of arms 123. When the tip portions 123b of the pair of arms 123 approach each other, the mounting spring 103 is biased. With the tip portions 123b of the pair of arms 123 in a state where they are close to each other, the pair of arms 123 are inserted into the first opening 131 of the first plate 101 from the tip portions 123b.

[0031] Fig. 10 is a perspective view illustrating a procedure for attaching the embedding plate 1 according to the embodiment of the present disclosure. Fig. 11 is a perspective view illustrating a state in which the second plate 102 of the embedding plate 1 according to the embodiment of the present disclosure has been attached. Fig. 12 is a perspective view illustrating a state in which the attachment of the embedding plate 1 according to the embodiment of the present disclosure has been completed.

[0032] When attaching the embedded plate 1, first, the first plate 101 is inserted and positioned on the back side of the ceiling member C through the embedding hole H. At this time, the mounting portion 121 of the first plate 101 is placed on the upper part of the ceiling member C.

[0033] Next, the mounting spring 103 is inserted into the first opening 131 of the first plate 101, and the second plate 102 is attached to the first plate 101. The mounting spring 103 is inserted from the tip end 123b into the first opening 131 of the first plate 101 in a state in which the pair of arm portions 123 are rotated around the ring portion 113 in directions in which they approach each other and are closed.

[0034] The action of closing the pair of arms 123 is performed, for example, by an operator gripping the pair of arms 123, and a biasing force in the direction in which the pair of arms 123 open is accumulated in the mounting spring 103. When the mounting spring 103 is inserted into the first opening 131, the force acting in the direction in which the pair of arms 123 close is released, for example, by the operator releasing the pair of arms 123, and the mounting spring 103 attempts to move in the opening direction. As a result, the pair of arms 123 of the mounting spring 103 slide along the periphery of the first opening 131 until they reach the notch 141, and are housed inside the notch 141. The pair of arms 123 do not slide from the notch 141 toward the first opening 131 and fall off due to the hook edge 141a provided in the notch 141.

[0035] Next, the second plate 102 is pushed upward, that is, above the ceiling member C, in a direction approaching the first plate 101. The action of pushing up the second plate 102 is performed, for example, by an operator. The action of the operator pushing up the second plate 102 induces rotation of the mounting spring 103 due to the restoring force of the ring portion 113. Therefore, the action of pushing up the second plate 102 does not need to be performed with a force strong enough to press the second plate 102 into the ceiling member C, but only with a force strong enough to induce rotation of the mounting spring 103.

[0036] As the rotation of the mounting spring 103 is induced, the elastic restoration of the ring portion 113 progresses, and the pair of arms 123 rotate in the opening direction. As the pair of arms 123 rotate in the opening direction, the sliding portions 123a of the pair of arms 123 slide on the periphery of the notch 141, generating a force that presses the periphery of the notch 141 downward. As a result, the height position of the ring portion 113 moves closer to the height position of the tip portions 123b of the pair of arms 123, and the second plate 102 to which the ring portion 113 is connected is pulled up as if sucked upward toward the first plate 101. In other words, the mounting spring 103 generates a pulling force Fd (see FIG. 13).

[0037] Next, when the second plate 102 is pulled up by the mounting spring 103 until it abuts against the ceiling member C, the ceiling member C is sandwiched between the first plate 101 and the second plate 102, and the installation of the embedded plate 1 is completed. With the embedded plate 1 installed, the first plate 101 is placed on the ceiling member C. Furthermore, the second plate 102 is pulled up by the mounting spring 103 and pushed up toward the design side of the ceiling member C, and is positioned directly below the ceiling member C.

[0038] Fig. 13 is a schematic diagram illustrating the force relationship in the embedded plate 1 according to the embodiment of the present disclosure. As shown in Fig. 13, the embedded plate 1 is subjected to the weight Fa of the first plate 101, the weight Fb of the second plate 102, a tension force Fc of the mounting spring 103, a pulling force Fd of the mounting spring 103, and an external force Fe by an operator. In addition, a frictional force is applied to the contact portion between the mounting spring 103 and the notch 141 of the first plate 101.

[0039] The pulling force Fd by the mounting spring 103 is adjusted to a magnitude that prevents the first plate 101 from floating up from the ceiling member C. In addition, the pulling force Fd by the mounting spring 103 is adjusted to a magnitude that can pull up the second plate 102.

[0040] If the lifting force Fd of the mounting spring 103 is greater than the weight Fa of the first plate 101 minus the static friction force at the contact point between the mounting spring 103 and the first plate 101, the first plate 101 will float above the ceiling member C. In other words, in this state, the tension force of the mounting spring 103 is too strong, so even if the second plate 102 is pressed upward, the mounting spring 103 will lift the first plate 101, causing it to float above the ceiling member C.

[0041] Therefore, the pulling force Fd by the attachment spring 103 satisfies the following relational expression A as a first condition. Fa-Fd>2μFc×α+Fe Fd <Fa-2αμFc-Fe···A Here, α is the number of attachment springs 103, and μ is the static friction coefficient at the contact portion between attachment springs 103 and first plate 101.

[0042] For example, when two wire springs are used as the mounting spring 103, the relational expression A can be expressed as follows: Fd <Fa-4μFc-Fe By making an adjustment so that the relational expression A is satisfied, the first plate 101 can be prevented from floating up from the ceiling member C.

[0043] If the pulling force Fd of the mounting spring 103 is smaller than the weight Fb of the second plate 102 plus the dynamic friction force between the mounting spring 103 and the notch 141, the mounting spring 103 cannot pull up the second plate 102. Therefore, the pulling force Fd of the mounting spring 103 satisfies the following relational expression B as a second condition. αFd-Fb>2μ'Fc×α Fd>2μ'Fc+Fb / α···B Here, μ′ is the coefficient of dynamic friction at the contact portion between the attachment spring 103 and the first plate 101.

[0044] For example, when two wire springs are used as the mounting spring 103, the relational expression B can be expressed as follows: Fd>2μ'Fc+Fb / 2 By adjusting the relationship B so that it is satisfied, the second plate 102 can be pulled up.

[0045] The lifting force Fd of the mounting spring 103 can be adjusted, for example, by the opening angle of the pair of arms 123 of the mounting spring 103, the shape of the pair of arms 123, or the coefficient of friction with the notch 141, etc.

[0046] Fig. 14 is an exploded perspective view showing an application example of the embedding plate 1 according to the embodiment of the present disclosure. As shown in Fig. 14, the embedding plate 1 is fitted into gaps that are generated at both ends of the lighting fixture 10 when the lighting fixture 10 for renovation is embedded in an embedding hole H that opens in a ceiling member C. A lighting fixture 11 different from the lighting fixture 10 for renovation is attached to the second opening 112 of the second plate 102.

[0047] By using the recessed plate 1, if a gap occurs because the renewal lighting fixture 10 does not block the recessed hole H in the ceiling member C, the gap can be blocked. Also, by making it possible to attach a lighting fixture 11 different from the renewal lighting fixture 10 to the recessed plate 1, lighting designs suitable for a variety of uses can be realized.

[0048] <Modification> Fig. 15 is a perspective view of an embedding plate 1 according to a modified example of the embodiment of the present disclosure, as viewed from above. Fig. 16 is a perspective view of an embedding plate 1 according to a modified example of the embodiment of the present disclosure, as viewed from below. Fig. 17 is a perspective view of an embedding plate 1 according to a modified example of the embodiment of the present disclosure, as viewed from below, in a direction different from that of Fig. 16. Fig. 18 is an exploded perspective view showing an application example of an embedding plate 1 according to a modified example of the embodiment of the present disclosure.

[0049] 15 to 18, the embedding plate 1 according to the modified example does not have a second opening 112 in the second plate 102. When the embedding plate 1 according to the modified example is fitted into gaps that occur at both ends of the renovation lighting fixture 10 in the embedding hole H of the ceiling member C, the embedding plate 1 can completely close the gaps.

[0050] By using the recessed plate 1 according to the modified example, it is possible to prevent the ceiling space from being exposed through a gap when there is no need to install a lighting fixture 11 different from the renewal lighting fixture 10. Furthermore, by using the recessed plate 1 according to the modified example, it is possible to improve the design of the ceiling surface when there is no need to install a lighting fixture 11 different from the renewal lighting fixture 10.

[0051] According to the embedded plate 1 of this embodiment described above, the force with which the mounting spring 103 pulls up the second plate 102 is smaller than the weight of the first plate 101 minus the static friction force between the mounting spring 103 and the notch 141 of the first plate 101. By adjusting the force with which the mounting spring 103 pulls up the second plate 102 in this way, the ceiling member C is sandwiched between the first plate 101 and the second plate 102 without the first plate 101 being pressed down on the ceiling member C from above. Therefore, when the ceiling member C is sandwiched between the first plate 101 and the second plate 102, the first plate 101 is prevented from being pushed up by the mounting spring 103 and lifting up from the ceiling member C, making it easier to install the embedded plate 1.

[0052] Furthermore, the force of the mounting spring 103 to pull up the second plate 102 is greater than the weight of the second plate 102 plus the kinetic friction force between the mounting spring 103 and the notch 141. Therefore, the second plate 102 is pulled up by the restoring force of the mounting spring 103, and can be pulled up as if sucked up toward the first plate 101 without pressing down on the first plate 101 from above the ceiling member C.

[0053] In addition, the mounting spring 103 is a V-spring, and moves upward by pressing the cutout portion 141 of the first plate 101 outward, thereby pulling the second plate 102 to which the mounting spring 103 is attached upward, resulting in a simple structure.

[0054] Furthermore, first plate 101 is formed with first opening 131 so as to be continuous with notch 141, and mounting spring 103 is inserted through first opening 131 and slid toward notch 141. This makes it easy to attach mounting spring 103 to first plate 101 during construction.

[0055] In addition, the cutout portion 141 is provided with a pair of hook edges 141a formed by narrowing the edge portion continuing to the first opening 131, which prevents the mounting spring 103 from sliding along the peripheral edge of the cutout portion 141 and coming off from the cutout portion 141 toward the first opening 131.

[0056] Furthermore, the cutout portion 141 of the first plate 101 is covered by the first plate 101, and the position of the mounting spring 103 does not need to be visible from the first opening 131, so the mounting spring 103 can be attached outside the first opening 131, increasing the degree of freedom in design.

[0057] Various aspects of the present disclosure are summarized below as appendices.

[0058] (Appendix 1) A first plate that is attached to an existing embedding hole; a second plate disposed opposite the first plate; an attachment spring attached to the second plate and engaged with a notch provided in the first plate; and In the direction in which the first plate and the second plate face each other, the force with which the mounting spring pulls up the second plate is smaller than the weight of the first plate minus the static friction force between the mounting spring and the notch. Recessed plate. (Appendix 2) The force with which the mounting spring pulls up the second plate is greater than the weight of the second plate plus the dynamic friction force between the mounting spring and the notch. 10. The embedding plate according to claim 1. (Appendix 3) The mounting spring is A V-spring is held in the notch by pressing the notch outward. 3. The embedding plate according to claim 1 or 2. (Appendix 4) The first plate has an opening formed therein that is continuous with the notch. 4. The embedding plate according to any one of claims 1 to 3. (Appendix 5) The cutout portion is The edge portion continuing to the opening is a pair of hook edges extending in directions approaching each other. 10. The embedding plate according to claim 4. (Appendix 6) When the second plate is engaged with the first plate and the second plate is viewed from the back side of the surface facing the first plate, The notch of the first plate is covered by the first plate. 6. The embedding plate according to any one of appendices 1 to 5. [Explanation of symbols]

[0059] 1 embedded plate, 10 lighting fixture, 11 lighting fixture, 15 anti-slip gasket, 101 first plate, 102 second plate, 103 mounting spring, 111 first main body portion, 112 second opening, 113 ring portion, 121 mounting portion, 123 arm portion, 123a sliding portion, 123b tip portion, 131 first opening portion, 141 notch portion, 141a hook edge portion.

Claims

1. a first plate attached to an existing embedding hole; a second plate disposed opposite the first plate; an attachment spring attached to the second plate and engaged with a notch provided in the first plate; and In the direction in which the first plate and the second plate face each other, the force with which the mounting spring lifts the second plate is smaller than a value obtained by subtracting the static friction force between the mounting spring and the notch from the weight of the first plate. Recessed plate.

2. The force of the mounting spring to lift up the second plate is greater than the weight of the second plate plus the dynamic friction force between the mounting spring and the notch. The embedding plate of claim 1 .

3. The mounting spring is A V-spring is held in the notch by pressing the notch outward.

3. The embedding plate according to claim 1 or 2.

4. The first plate has an opening formed therein that is continuous with the notch.

3. The embedding plate according to claim 1 or 2.

5. The cutout portion is The edge portion continuing to the opening is a pair of hook edges extending in directions approaching each other.

5. The embedding plate of claim 4.

6. When the second plate is engaged with the first plate and the second plate is viewed from the back side of the surface facing the first plate, The notch of the first plate is covered by the first plate.

3. The embedding plate according to claim 1 or 2.

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