Pressure sensitive washer, and terminal block

Abstract

To provide a pressure sensitive washer that allows visual confirmation of completion of fastening of a screw to be easily performed, and a terminal block.SOLUTION: A pressure sensitive washer 1 according to the present disclosure comprises a pressure sensitive washer body 10, and a pressure sensitive member 20 attached to a first surface 10b of the pressure sensitive washer body 10. In the pressure sensitive member 20, the color of the pressure sensitive member 20 is changed when a predetermined pressure is applied to the pressure sensitive member 20.SELECTED DRAWING: Figure 5

Description

[Technical Field]

[0001] The present disclosure relates to a pressure sensitive washer and a terminal block. [Background technology]

[0002] Conventionally, in order to prevent forgetting to tighten a screw or tightening it insufficiently, a washer has been known in which, when sufficient tightening force is applied, protruding claws provided on the periphery of the washer bend, allowing the user to confirm that the screw has been tightened completely (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2006-105382 Summary of the Invention [Problem to be solved by the invention]

[0004] With conventional washers, complete screw tightening is confirmed by the deformation of the washer, but with small washers, the deformation is small and it is difficult to visually confirm.

[0005] In order to solve the above problem, the present disclosure aims to provide a pressure-sensitive washer and a terminal block that allow easy visual confirmation of completion of screw tightening. [Means for solving the problem]

[0006] The pressure-sensitive washer according to the present disclosure comprises a pressure-sensitive washer body and a pressure-sensitive member attached to a first surface of the pressure-sensitive washer body, wherein the color of the pressure-sensitive member changes when a predetermined pressure is applied to the pressure-sensitive member.

[0007] The terminal block according to the present disclosure comprises a terminal block body, and at least a pair of corresponding connection portions are formed on the terminal block body, and each connection portion has a pressure-sensitive washer according to the present disclosure and a screw, and electrical wiring can be connected to each connection portion by tightening the screw, and when the screw is tightened, pressure is applied to the pressure-sensitive member. [Effects of the Invention]

[0008] The pressure-sensitive washer and terminal block of the present disclosure make it easy to visually confirm whether the screw has been tightened. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a schematic diagram showing a terminal block according to a first embodiment. [Figure 2] FIG. 2 is a schematic diagram showing the connection portion of FIG. 1. [Figure 3] FIG. 3 is a cross-sectional view taken along line III-III in FIG. 2. [Figure 4] FIG. 3 is a schematic view showing the upper washer of FIG. 2. [Figure 5] FIG. 4 is a schematic diagram showing the pressure-sensitive washer of FIG. 3. [Figure 6] FIG. 10 is a schematic diagram showing a connection portion according to a second embodiment. [Figure 7] FIG. 7 is a cross-sectional view taken along line VII-VII in FIG. 6. [Figure 8] FIG. 7 is a schematic diagram showing the pressure-sensitive washer of FIG. 6. [Figure 9] FIG. 8 is a schematic view showing the lower washer of FIG. 7. [Figure 10] FIG. 10 is a schematic diagram showing a pressure-sensitive washer according to a third embodiment. [Figure 11] FIG. 10 is a schematic view showing a lower washer according to a fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, embodiments of the present disclosure will be described with reference to the drawings. Embodiment 1 1 is a schematic diagram showing a terminal block 100 according to embodiment 1. The terminal block 100 electrically connects a pair of electrical wires to each other.

[0011] The terminal block 100 has a terminal block body 101. The terminal block body 101 is formed with at least one first connection portion 110A as the connection portion 110 and one second connection portion 110B as the connection portion 110 corresponding to the first connection portion 110A. The terminal block 100 in the first embodiment is formed with four pairs of the first connection portion 110A and the second connection portion 110B.

[0012] The first connection portions 110A are formed side by side on the upper edge portion of the terminal block body 101. The second connection portions 110B are formed side by side on the upper edge portion of the terminal block body 101 opposite to the upper edge portion of the terminal block body 101 on which the first connection portions 110A are formed.

[0013] The corresponding first connection portion 110A and second connection portion 110B are electrically connected to each other. The corresponding first connection portion 110A and second connection portion 110B are formed at positions facing each other.

[0014] A plurality of walls 101a are formed on the terminal block body 101. A single connection portion 110 is formed in a space defined by the walls 101a on three sides. That is, the walls 101a separate each of the connection portions 110.

[0015] Specifically, the wall portions 101a are formed between two adjacent first connection portions 110A, between two adjacent second connection portions 110B, and between opposing first connection portions 110A and second connection portions 110B.

[0016] A first electrical wiring 200A is connected to each of the first connection portions 110A, and a second electrical wiring 200B is connected to each of the second connection portions 110B.

[0017] Fig. 2 is a schematic diagram showing the connection portion 110 of Fig. 1. Fig. 3 is a cross-sectional view showing a cross section taken along line III-III of Fig. 2. Because each first connection portion 110A and each second connection portion 110B has the same configuration, the configuration of each first connection portion 110A and each second connection portion 110B will be described here as connection portion 110. Furthermore, because each first electrical wiring 200A and each second electrical wiring 200B has the same configuration, the configuration of each first electrical wiring 200A and each second electrical wiring 200B will be described here as electrical wiring 200.

[0018] When referring to the configuration of the first connecting portion 110A, the prefix "first" will be added to the name of each component of the connecting portion 110, and the reference number will end with "A." Similarly, when referring to the configuration of the second connecting portion 110B, the prefix "second" will be added to the name of each component of the connecting portion 110, and the reference number will end with "B."

[0019] Each space defined by the wall 101a is a box-shaped space. The surface of the terminal block body 101, which is the bottom of the box-shaped space, is a connection portion forming surface 101b. A screw hole 101c is formed in the connection portion forming surface 101b.

[0020] The distance between the opposing walls 101a is defined as the connection width W, and the direction in which the connection width W extends is defined as the width direction.

[0021] The connection part 110 has a pressure-sensitive washer 1, an upper washer 3, and a screw 5. The pressure-sensitive washer 1, the upper washer 3, and the screw 5 are conductive. The upper washer 3 is formed with an upper washer through-hole 3a through which the screw 5 passes, and a downward confirmation part 31. The downward confirmation part 31 will be described later.

[0022] The pressure-sensitive washer 1 is formed with a pressure-sensitive washer through-hole 1a through which the screw 5 passes and a confirmation portion 11. The pressure-sensitive washer 1 has a pressure-sensitive washer body 10 and a pressure-sensitive member 20.

[0023] A washer body through-hole 10a that constitutes the pressure-sensitive washer through-hole 1a is formed in the pressure-sensitive washer body 10. The confirmation portion 11 will be described later.

[0024] The pressure-sensitive member 20 is attached to the first surface 10b, which is the underside of the pressure-sensitive washer body 10. A pressure-sensitive portion through-hole 20a, which constitutes the pressure-sensitive washer through-hole 1a, is formed in the pressure-sensitive member 20. The pressure-sensitive member 20 will be described later.

[0025] A pressure-sensitive washer 1 is placed on the connection portion forming surface 101b, and an upper washer 3 is placed on top of the pressure-sensitive washer 1. The pressure-sensitive washer 1 is placed so that the first surface 10b faces the connection portion forming surface 101b, i.e., so that the pressure-sensitive member 20 faces the connection portion forming surface 101b.

[0026] With the pressure-sensitive washer 1 and the upper washer 3 stacked on top of each other, the screws 5 passed through the pressure-sensitive washer through-holes 1a and 3a are tightened into the corresponding screw holes 101c, thereby fixing the upper washer 3 and the pressure-sensitive washer 1 in their corresponding spaces.

[0027] An electric wiring 200 is connected to the connection part 110. A terminal 200a, which is an end of the electric wiring 200, is connected to the connection part 110 after being subjected to terminal processing.

[0028] In the first embodiment, the terminal 200a is terminated by stripping the insulation from the terminal 200a to expose the conductor. However, the present invention is not limited to this, and the terminal 200a may be terminated by any other known method. For example, a connection terminal for a wiring terminal may be connected to the terminal 200a.

[0029] The terminal 200a is inserted between the upper washer 3 and the pressure-sensitive washer 1 in a direction perpendicular to the width direction of the connecting portion 110. That is, the insertion direction of the terminal 200a is a direction perpendicular to the width direction.

[0030] The terminal 200a is inserted between the upper washer 3 and the pressure-sensitive washer 1, avoiding the screw 5. In other words, the terminal 200a is inserted between the upper washer 3 and the pressure-sensitive washer 1 at a position offset in the width direction of the connection part 110.

[0031] With the terminal 200a inserted between the upper washer 3 and the pressure-sensitive washer 1, the screw 5 is tightened, whereby the terminal 200a is sandwiched and fixed between the upper washer 3 and the pressure-sensitive washer 1. This connects the electrical wiring 200 and the connection part 110 mechanically and electrically.

[0032] When the screws 5 are fastened into the corresponding screw holes 101c and the electrical wiring 200 is connected to the connection portion 110, the lower surface of the pressure-sensitive washer 1 is pressed against the connection portion forming surface 101b.

[0033] A pair of pressure-sensitive washers 1 arranged on the corresponding first connection portion 110A and second connection portion 110B are electrically connected to each other by an internal mechanism (not shown) of the terminal block main body 101. Therefore, the first electrical wiring 200A and second electrical wiring 200B connected to the corresponding first connection portion 110A and second connection portion 110B, respectively, are electrically connected to each other.

[0034] The electrical wiring 200 connected to the connection portions 110 that are not electrically connected to each other, for example, the electrical wiring 200 connected to adjacent connection portions 110, is not electrically connected unless it crosses the wall portion 101a and makes electrical contact.

[0035] Fig. 4 is a schematic diagram showing the upper washer 3 of Fig. 2. The upper washers 3 having the same configuration are used for each of the first connecting portions 110A and each of the second connecting portions 110B.

[0036] The upper washer 3 includes an upper washer body 30 and an upper washer sealing member 33 made of a transparent material.

[0037] The upper washer body 30 is a plate material having a substantially rectangular shape. The length of the diagonal of the upper washer body 30 is defined as the upper washer length L3.

[0038] The upper washer body 30 has a gently uneven shape, giving it a wavy appearance. However, the shape of the upper washer body 30 is not limited to this, and it may be, for example, a flat plate shape.

[0039] An upper body through-hole 30a and a downward confirmation through-hole 30g are formed in the upper washer body 30. The upper body through-hole 30a is formed in the center of the upper washer body 30. The upper body through-hole 30a constitutes the upper washer through-hole 3a.

[0040] The lower confirmation portion 31 is formed by inserting an upper washer sealing member 33 into a lower confirmation through-hole 30g formed in the upper washer body 30.

[0041] Fig. 5 is a schematic diagram showing the pressure-sensitive washer 1 of Fig. 3. Each of the first connecting portions 110A and each of the second connecting portions 110B uses a pressure-sensitive washer 1 having the same configuration.

[0042] The pressure-sensitive washer body 10 is a plate material having a substantially rectangular shape. The length of the diagonal of the pressure-sensitive washer body 10 is defined as the pressure-sensitive washer length L1.

[0043] A washer body through-hole 10a and a confirmation through-hole 10g are formed in the pressure-sensitive washer body 10. The washer body through-hole 10a constitutes the pressure-sensitive washer through-hole 1a.

[0044] The pressure-sensitive washer 1 further includes a sealing member 13. The confirmation portion 11 is formed by inserting the sealing member 13 into the confirmation through-hole 10g. The sealing member 13 is made of a transparent material.

[0045] The upper surface of the pressure-sensitive washer body 10 is referred to as the second surface 10c. The lower surface of the pressure-sensitive washer body 10, which is the surface opposite to the second surface 10c, is referred to as the first surface 10b. A pressure-sensitive member 20 is attached to the first surface 10b of the pressure-sensitive washer body 10.

[0046] The pressure-sensitive member 20 has a pressure-sensitive member body 21 and a film 23 that covers the entire pressure-sensitive member body 21. In Figure 5, a portion of the pressure-sensitive member 20 is shown in cross section, and part of the outline of the pressure-sensitive member 20 is shown by a dashed line.

[0047] The pressure-sensitive member body 21 has the property that its color changes depending on the pressure applied to the pressure-sensitive member body 21. The pressure-sensitive member body 21 can be made to change color at any pressure by adjusting the components in advance. That is, when a predetermined pressure is applied to the pressure-sensitive member body 21, the color of the pressure-sensitive member body 21 changes. Therefore, when a predetermined pressure is applied to the pressure-sensitive member 20, the color of the pressure-sensitive member 20 changes. For example, the pressure-sensitive member body 21 is in a gel state.

[0048] The film 23 is transparent. The color of the pressure-sensitive member main body 21, which is entirely covered by the film 23, can be seen through the film 23. The film 23 is stretchable and flexible. When pressure is applied to the pressure-sensitive member 20, the pressure-sensitive member main body 21 and the film 23 covering it are deformed. The film 23 can deform and stretch in response to the deformation of the pressure-sensitive member main body 21 itself.

[0049] When the pressure-sensitive member body 21 is covered with the film 23, a gap may exist between the pressure-sensitive member body 21 and the film 23. The film 23 has stretchability and flexibility, or a gap exists between the pressure-sensitive member body 21 and the film 23, so that the film 23 does not hinder the deformation of the pressure-sensitive member body 21. Therefore, only the pressure of the tightening by the screw 5 is applied to the pressure-sensitive member body 21. Therefore, the pressure generated by tightening by the screw 5 can be applied more accurately to the pressure-sensitive member body 21.

[0050] The pressure-sensitive member 20 is attached to the first surface 10b by adhesive. The pressure-sensitive member 20 attached to the first surface 10b covers at least a part of the confirmation portion 11. The color of the pressure-sensitive member 20 can be visually confirmed through the confirmation portion 11 from the second surface 10c of the pressure-sensitive washer body 10.

[0051] 2 and 3, the explanation will be continued. When the upper washer 3 is attached to the connection portion 110, the downward confirmation portion 31 does not face the head of the screw 5 when viewed vertically. In other words, the downward confirmation portion 31 is formed at a position on the upper washer body 30 that avoids the head of the screw 5.

[0052] Similarly, when the pressure-sensitive washer 1 is attached to the connection part 110, the confirmation part 11 does not face the head of the screw 5 when viewed vertically. In other words, the confirmation part 11 is formed at a position on the pressure-sensitive washer body 10 that avoids the head of the screw 5.

[0053] In other words, when the upper washer 3 and the pressure-sensitive washer 1 are attached to the connection portion 110, the color of the pressure-sensitive member 20 can be confirmed through the downward confirmation portion 31 and the confirmation portion 11 when viewed from above in the vertical direction.

[0054] When each connection portion 110 is viewed vertically, the lower confirmation portion 31 and the confirmation portion 11 are each located closer to the edge of the terminal block body 101 than a line that is parallel to the width direction and passes through the center of the screw 5. The lower confirmation portion 31 and the confirmation portion 11 are each located in one area on either side of a line that is perpendicular to the width direction and passes through the center of the screw 5.

[0055] The terminal 200a of the electrical wiring 200 connected to the connection portion 110 is inserted into the area where the lower confirmation portion 31 and the confirmation portion 11 are not located, with the boundary being a line that is perpendicular to the width direction and passes through the center of the screw 5.

[0056] The upper washer length L3 and the pressure-sensitive washer length L1 are longer than the connection width W. Therefore, the upper washer 3 and the pressure-sensitive washer 1 are prevented from rotating around the axis of the screw 5 by the wall 101a. When the upper washer 3 and the pressure-sensitive washer 1 are attached to the connection 110, the upper washer 3 and the pressure-sensitive washer 1 do not rotate one full turn around the axis of the screw 5.

[0057] Next, confirmation of the tightening of the screw 5 in the terminal block 100 of the first embodiment will be described with reference to FIGS. 2 and 3. FIG.

[0058] The upper washer 3 and the pressure-sensitive washer 1 are attached to the connection part 110, and the terminal 200a of the electrical wiring 200 is inserted between the upper washer 3 and the pressure-sensitive washer 1. The screw 5 is tightened to a predetermined tightness, completing the connection of the electrical wiring 200 to the connection part 110.

[0059] In this state, the pressure-sensitive member 20 is sandwiched between the connection portion forming surface 101b of the terminal block main body 101 and the pressure-sensitive washer main body 10, and is subjected to pressure. The pressure-sensitive member 20 is adjusted in advance so that its color changes depending on the pressure it receives when the connection between the electrical wiring 200 and the connection portion 110 is completed.

[0060] Therefore, when the connection of the electrical wiring 200 to the connection portion 110 is completed, the color of the pressure-sensitive member 20 has changed. The worker can check the color of the pressure-sensitive member 20 via the lower confirmation portion 31 and the confirmation portion 11.

[0061] When the screw 5 is loosened from this state, the pressure that the pressure-sensitive member 20 has been receiving decreases, and the color of the pressure-sensitive member 20 changes to the color it has when no pressure is being applied. Even when the screw 5 is loosened, the worker can check the color of the pressure-sensitive member 20 via the downward checking unit 31 and the checking unit 11.

[0062] The pressure-sensitive washer 1 in the first embodiment is formed with a confirmation portion 11. However, this is not limited to this. The pressure-sensitive washer 1 does not have to be formed with a confirmation portion 11. That is, the worker may check the color of the pressure-sensitive member 20 by looking at the pressure-sensitive member 20 from the side. Also, the lower confirmation portion 31 does not have to be formed on the upper washer 3.

[0063] Furthermore, in the first embodiment, the confirmation section 11 is formed by inserting a sealing member 13 into a confirmation through-hole 10g formed in the pressure-sensitive washer body 10. However, this is not limited to this. The confirmation section 11 may be formed only with the confirmation through-hole 10g without the sealing member 13. In this case, the pressure-sensitive member 20 covering the confirmation through-hole 10g is not subjected to pressure. However, as described above, the pressure-sensitive member 20 surrounding the confirmation through-hole 10g is subjected to pressure and changes color. Therefore, the color change of the pressure-sensitive member 20 surrounding the confirmation through-hole 10g can be confirmed through the confirmation through-hole 10g. Alternatively, instead of the confirmation through-hole 10g, a notch may be formed by removing a portion of the pressure-sensitive washer body 10 from the outer periphery toward the washer body through-hole 10a. Furthermore, the sealing member 13 may or may not be placed in the notch.

[0064] The pressure-sensitive washer 1 according to the first embodiment includes a pressure-sensitive washer body 10 and a pressure-sensitive member 20 attached to the first surface 10b of the pressure-sensitive washer body 10. The pressure-sensitive member 20 changes color when a predetermined pressure is applied to the pressure-sensitive member 20. This allows an operator to confirm the completion of tightening of the screw 5 based on the color of the pressure-sensitive member 20. Therefore, visual confirmation of the completion of tightening of the screw 5 can be easily performed. Furthermore, visual inspection can also be easily performed when checking the tightening of the screw 5. Furthermore, this causes the color of the pressure-sensitive member 20 to change depending on the pressure applied when tightening the screw 5. Therefore, the time and effort required to mark the head of the screw 5 after tightening the screw 5 is eliminated, improving the efficiency of the tightening operation of the screw 5. Furthermore, this causes the color of the pressure-sensitive member 20 to change depending on the applied pressure. Therefore, the pressure-sensitive washer 1 allows the operator to confirm the completion of tightening of the screw 5 each time it is tightened multiple times. Therefore, there is no need to prepare a new pressure-sensitive washer 1 every time the screw 5 is loosened and then retightened.

[0065] According to the pressure-sensitive washer 1 of the first embodiment, the pressure-sensitive member 20 includes a pressure-sensitive member body 21 that changes color when a predetermined pressure is applied, and a film 23 that covers the pressure-sensitive member body 21. Furthermore, the film 23 is transparent. This allows pressure to be applied over a wide area of the pressure-sensitive member body 21 even when pressure is applied only partially to the pressure-sensitive member 20, and the color of the pressure-sensitive member body 21 can be confirmed through the transparent film 23. Therefore, the color change in the pressure-sensitive member 20 occurs over a wide area, making it easy to confirm that the color change has occurred. This allows easy visual confirmation of whether the screw 5 has been tightened.

[0066] According to the pressure-sensitive washer 1 of the first embodiment, a confirmation portion 11 is formed on at least a portion of the pressure-sensitive washer body 10. Furthermore, the color of the pressure-sensitive member 20 can be confirmed through the confirmation portion 11 from the second surface 10c, which is the surface opposite to the first surface 10b of the pressure-sensitive washer body 10. This allows the color of the pressure-sensitive member 20 to be confirmed by looking at the confirmation portion 11. Therefore, visual confirmation of completion of tightening of the screw 5 can be easily performed.

[0067] According to the pressure-sensitive washer 1 of the first embodiment, the confirmation portion 11 is a notch or a confirmation through-hole 10g formed in the pressure-sensitive washer body 10. This allows the color of the pressure-sensitive member 20 to be confirmed from directly above the pressure-sensitive washer 1 through the confirmation portion 11. This makes it easy to visually confirm whether the screw 5 has been tightened.

[0068] According to the pressure-sensitive washer 1 of the first embodiment, a sealing member 13 made of a transparent material is attached to the notch or confirmation through-hole 10g. This allows the sealing member 13 to apply pressure to the pressure-sensitive member 20 in contact with the sealing member 13, causing the color of the pressure-sensitive member 20 in contact with the sealing member 13 to change. Therefore, by checking the color of the pressure-sensitive member 20 located directly below the notch or confirmation through-hole 10g, it is easy to visually confirm whether the screw 5 has been tightened.

[0069] The terminal block 100 according to the first embodiment includes a terminal block main body 101, and at least a pair of corresponding connection portions 110 are formed on the terminal block main body 101. Each connection portion 110 includes a pressure-sensitive washer 1 according to the present disclosure and a screw 5. An electrical wiring 200 can be connected to each connection portion 110 by fastening the screw 5, and when the screw 5 is fastened, pressure is applied to the pressure-sensitive member 20. This allows the operator to confirm that the color of the pressure-sensitive member 20 changes due to the pressure applied when the screw 5 is completely fastened. Therefore, the operator can confirm that the screw 5 has been completely fastened based on the color of the pressure-sensitive member 20. This makes it easy to visually confirm that the screw 5 has been completely fastened.

[0070] The terminal block 100 according to the first embodiment includes a terminal block main body 101, which has at least a pair of corresponding connection portions 110 formed therein. Each connection portion 110 includes a pressure-sensitive washer 1 according to the present disclosure, an upper washer 3 disposed above the pressure-sensitive washer 1, and a screw 5. The terminal block main body 101 corresponding to each connection portion 110 has a screw hole 101c corresponding to the screw 5. The pressure-sensitive washer 1 is disposed such that its first surface 10b faces the terminal block main body 101, allowing electrical wiring 200 to be inserted between the upper washer 3 and the pressure-sensitive washer 1. By fastening the screws 5, which are respectively threaded through the upper washer 3 and the pressure-sensitive washer 1, into the screw hole 101c, the pressure-sensitive member 20 is sandwiched between the pressure-sensitive washer main body 10 and the terminal block main body 101, and pressure is applied to the pressure-sensitive member 20. This allows the operator to confirm whether the screw 5 has been fully tightened based on the color of the pressure-sensitive member 20. Therefore, visual confirmation of completion of screw 5 tightening can be easily performed. Furthermore, this causes the color of the pressure-sensitive member 20 to change depending on the pressure applied when tightening the screw 5. Therefore, the time and effort of marking the head of the screw 5 after tightening the screw 5 is eliminated, making the screw 5 tightening work more efficient. Furthermore, this causes the color of the pressure-sensitive member 20 to change depending on the applied pressure. Therefore, the pressure-sensitive washer 1 can confirm completion of tightening each time the screw 5 is tightened multiple times. Therefore, it is not necessary to prepare a new pressure-sensitive washer 1 every time the screw 5 is loosened and retightened during electrical wiring work. Furthermore, this also allows the pressure-sensitive washer 1 to be formed in a shape and size that matches the terminal block 100, making it possible to appropriately apply it to existing terminal blocks 100. Therefore, visual confirmation of completion of screw 5 tightening can be easily performed even with existing terminal blocks 100.

[0071] The terminal block 100 according to the first embodiment includes a terminal block main body 101, and at least a pair of corresponding connection portions 110 are formed on the terminal block main body 101. Each connection portion 110 includes a pressure-sensitive washer 1 according to the present disclosure, in which a confirmation portion 11 is formed on at least a portion of the pressure-sensitive washer main body 10, an upper washer 3 disposed above the pressure-sensitive washer 1, and a screw 5. The terminal block main body 101 corresponding to each connection portion 110 has a screw hole 101c corresponding to the screw 5. The pressure-sensitive washer 1 is disposed such that its first surface 10b faces the terminal block main body 101, and electrical wiring 200 can be inserted between the upper washer 3 and the pressure-sensitive washer 1. By fastening the screws 5, which are passed through the upper washer 3 and the pressure-sensitive washer 1, respectively, into the screw hole 101c, the pressure-sensitive member 20 is sandwiched between the pressure-sensitive washer main body 10 and the terminal block main body 101, and pressure is applied. This allows the worker to confirm the completion of the screw 5 tightening based on the color of the pressure-sensitive member 20. Therefore, visual confirmation of the completion of the screw 5 tightening can be easily performed. Furthermore, this causes the color of the pressure-sensitive member 20 to change depending on the pressure applied when tightening the screw 5. Therefore, the work of marking the head of the screw 5 after tightening the screw 5 is eliminated, thereby improving the efficiency of the screw 5 tightening work. Furthermore, this causes the color of the pressure-sensitive member 20 to change depending on the applied pressure. Therefore, the pressure-sensitive washer 1 can confirm the completion of the screw 5 tightening each time it is tightened multiple times. Therefore, it is not necessary to prepare a new pressure-sensitive washer 1 every time the screw 5 is loosened and retightened during electrical wiring work. Furthermore, this also allows the pressure-sensitive washer 1 to be formed in a shape and size that matches the terminal block 100, making it possible to appropriately apply it to existing terminal blocks 100. Therefore, visual confirmation of the completion of the screw 5 tightening can be easily performed even with existing terminal blocks 100.

[0072] According to terminal block 100 of embodiment 1, upper washer 3 is formed with downward confirmation portion 31, and the color of pressure-sensitive member 20 can be confirmed from above upper washer 3 via downward confirmation portion 31 and confirmation portion 11. This allows the color of pressure-sensitive member 20 to be confirmed from above upper washer 3 via downward confirmation portion 31 and confirmation portion 11. Therefore, visual confirmation of completion of tightening of screw 5 can be easily performed.

[0073] Furthermore, according to the terminal block 100 of the first embodiment, the upper washer 3 and the pressure-sensitive washer 1 do not rotate around the screw 5, so the positions of the lower confirmation portion 31 and the confirmation portion 11 are always the same. Therefore, it is easy to visually confirm whether the screw 5 has been tightened. Furthermore, the lower confirmation portion 31 and the confirmation portion 11 are each located closer to the edge of the terminal block body 101 than a line that is parallel to the width direction and passes through the center of the screw 5. Therefore, the lower confirmation portion 31 and the confirmation portion 11 are each located in a position that makes them easy to see, making it easy to visually confirm whether the screw 5 has been tightened.

[0074] Embodiment 2 The terminal block 100 in the second embodiment differs from the terminal block 100 in the first embodiment in that the pressure-sensitive washer 1 is disposed above the lower washer 4.

[0075] In the second embodiment, the first connecting parts 110A and the second connecting parts 110B have the same configuration, and are therefore described as connecting parts 110. Furthermore, the first connecting parts 110A and the second connecting parts 110B each use a pressure-sensitive washer 1 and a lower washer 4 having the same configuration.

[0076] Fig. 6 is a schematic diagram showing a connection portion 110 according to embodiment 2. Fig. 7 is a cross-sectional view showing a cross section taken along line VII-VII in Fig. 6.

[0077] The connecting portion 110 has a pressure-sensitive washer 1, a lower washer 4, and a screw 5. The pressure-sensitive washer 1, the lower washer 4, and the screw 5 are conductive. The lower washer 4 has a lower washer through-hole 4a formed therein that corresponds to the screw 5.

[0078] The lower washer 4 is disposed on the connection portion forming surface 101b, and the pressure-sensitive washer 1 is disposed on top of the lower washer 4. The pressure-sensitive washer 1 is disposed so that the first surface 10b faces the upper surface of the lower washer 4, i.e., so that the pressure-sensitive member 20 faces the upper surface of the lower washer 4.

[0079] With the lower washer 4 and the pressure-sensitive washer 1 stacked on top of each other, the screws 5 passed through the pressure-sensitive washer through-holes 1a and 4a are tightened into the corresponding screw holes 101c, thereby fixing the pressure-sensitive washer 1 and the lower washer 4 to the corresponding spaces, i.e., the corresponding connection-forming surfaces 101b.

[0080] The terminal 200a of the electrical wiring 200 is inserted between the pressure-sensitive washer 1 and the lower washer 4. The terminal 200a is inserted between the pressure-sensitive washer 1 and the lower washer 4 in a direction perpendicular to the width direction of the connection portion 110.

[0081] The terminal 200a is inserted between the pressure-sensitive washer 1 and the lower washer 4, avoiding the screw 5. In other words, the terminal 200a is inserted between the pressure-sensitive washer 1 and the lower washer 4, at a position offset in the width direction of the connection part 110.

[0082] With the terminal 200a inserted between the pressure-sensitive washer 1 and the lower washer 4, the screw 5 is tightened, whereby the terminal 200a is sandwiched and fixed between the pressure-sensitive washer 1 and the lower washer 4. This allows the electrical wiring 200 and the connection part 110 to be mechanically and electrically connected.

[0083] When the screws 5 are fastened into the corresponding screw holes 101c and the electrical wiring 200 is connected to the connection portion 110, the pressure-sensitive washer 1 is pressed against the lower washer 4.

[0084] A pair of lower washers 4 arranged on the corresponding first connection portion 110A and second connection portion 110B are electrically connected to each other by an internal mechanism (not shown) of the terminal block main body 101. Therefore, the first electrical wiring 200A and second electrical wiring 200B connected to the corresponding first connection portion 110A and second connection portion 110B, respectively, are electrically connected to each other.

[0085] FIG. 8 is a schematic diagram showing the pressure-sensitive washer 1 of FIG. 6. The pressure-sensitive washer body 10 has a gently uneven shape, giving it a wavy appearance. However, the shape of the pressure-sensitive washer body 10 is not limited to this and may be, for example, a flat plate shape. The other configurations of the pressure-sensitive washer 1 in embodiment 2 are the same as those of the pressure-sensitive washer 1 in embodiment 1, so a description thereof will be omitted.

[0086] Fig. 9 is a schematic diagram showing the lower washer 4 of Fig. 7. The lower washer 4 includes a lower washer body 40. The lower washer body 40 is a plate material and has a substantially rectangular shape.

[0087] A lower body through-hole 40a is formed in the lower washer body 40. The lower body through-hole 40a is formed in the center of the lower washer body 40. The lower body through-hole 40a constitutes the lower washer through-hole 4a formed in the lower washer 4, through which the screw 5 passes.

[0088] 6 and 7, the explanation will be continued. When the pressure-sensitive washer 1 is attached to the connection part 110, the confirmation part 11 does not face the head of the screw 5 when viewed vertically. In other words, the confirmation part 11 is formed at a position on the pressure-sensitive washer body 10 that avoids the head of the screw 5.

[0089] When the pressure-sensitive washer 1 and the lower washer 4 are attached to the connection part 110, the color of the pressure-sensitive member 20 can be confirmed through the confirmation part 11 when viewed from above in the vertical direction.

[0090] When each connection portion 110 is viewed vertically, the confirmation portion 11 is disposed closer to the edge of the terminal block body 101 than a line that is parallel to the width direction and passes through the center of the screw 5. The confirmation portion 11 is disposed in one area on either side of a line that is perpendicular to the width direction and passes through the center of the screw 5.

[0091] The terminal 200a of the electrical wiring 200 connected to the connection portion 110 is inserted into the area where the confirmation portion 11 is not located, separated by a line passing through the center of the screw 5 perpendicular to the width direction.

[0092] The pressure-sensitive washer length L1 is longer than the connection portion width W. Therefore, the pressure-sensitive washer 1 is blocked by the wall portion 101a and cannot rotate around the axis of the screw 5. Similarly, the lower washer 4 is blocked by the wall portion 101a and cannot rotate around the axis of the screw 5. When the pressure-sensitive washer 1 and the lower washer 4 are attached to the connection portion 110, the pressure-sensitive washer 1 and the lower washer 4 cannot rotate around the axis of the screw 5.

[0093] In the second embodiment, the terminal 200a of the electrical wiring 200 is inserted between the pressure-sensitive member 20 and the lower washer body 40, and is connected to the connection part 110 by being sandwiched between the pressure-sensitive washer body 10 and the lower washer body 40. Pressure is applied to the pressure-sensitive member 20 by being sandwiched between the pressure-sensitive washer body 10 and the lower washer body 40.

[0094] When the connection of the electrical wiring 200 to the connection portion 110 is completed, the color of the pressure-sensitive member 20 has changed, and the worker can check the color of the pressure-sensitive member 20 via the check portion 11.

[0095] In the terminal block 100 of the second embodiment, the terminal 200a of the electrical wiring 200 is also in contact with the lower washer 4, and therefore the terminal block 100 and the electrical wiring 200 are electrically connected. The other configurations of the terminal block 100 of the second embodiment are the same as those of the terminal block 100 of the first embodiment, and therefore a description thereof will be omitted.

[0096] The terminal block 100 according to the second embodiment includes a terminal block main body 101, which is formed with at least a pair of corresponding connection portions 110. Each connection portion 110 includes a pressure-sensitive washer 1 according to the present disclosure, a lower washer 4 disposed below the pressure-sensitive washer 1, and a screw 5. The terminal block main body 101 corresponding to each connection portion 110 has a screw hole 101c corresponding to the screw 5. The pressure-sensitive washer 1 is disposed with its first surface 10b facing the lower washer 4. Electrical wiring 200 can be inserted between the pressure-sensitive washer 1 and the lower washer 4. By fastening the screws 5, which are passed through the pressure-sensitive washer 1 and the lower washer 4, into the screw hole 101c, the pressure-sensitive member 20 is sandwiched between the pressure-sensitive washer main body 10 and the lower washer 4, and pressure is applied. This allows the operator to confirm the completion of the screw 5 based on the color of the pressure-sensitive member 20. Therefore, visual confirmation of the completion of the screw 5 can be easily performed. Furthermore, this causes the color of the pressure-sensitive member 20 to change depending on the pressure applied when the screw 5 is tightened. This eliminates the need to mark the head of the screw 5 after tightening, making the tightening process of the screw 5 more efficient. This also causes the color of the pressure-sensitive member 20 to change depending on the pressure applied. Therefore, the pressure-sensitive washer 1 can be used to tighten the screw 5 multiple times, allowing the completion of tightening to be confirmed each time. This eliminates the need to prepare a new washer every time the screw 5 is loosened and tightened again during electrical wiring work. This also allows the pressure-sensitive washer 1 to be formed in a shape and size that matches the terminal block 100, making it possible to appropriately apply it to existing terminal blocks 100. Therefore, it is easy to visually confirm the completion of tightening the screw 5 even with existing terminal blocks 100.

[0097] Embodiment 3 The terminal block 100 in the third embodiment differs from the terminal block 100 in the second embodiment in that the pressure-sensitive member 20 is attached to only half of the lower surface of the pressure-sensitive washer 1.

[0098] 10 is a schematic diagram showing a pressure-sensitive washer 1 according to the present embodiment 3. The pressure-sensitive washer 1 includes a pressure-sensitive washer body 10, a pressure-sensitive member 20, and a sealing member 13.

[0099] In the pressure-sensitive washer 1, a straight line along the opposing sides that passes through the center of the pressure-sensitive washer through-hole 1a is defined as the pressure-sensitive washer center line C1. When the pressure-sensitive washer main body 10 is viewed along the normal direction of the first surface 10b, the pressure-sensitive washer center line C1 passes through the center of the pressure-sensitive washer main body 10.

[0100] The pressure-sensitive member 20 is attached to only one side of the first surface 10b when the pressure-sensitive washer center line C1 is used as the boundary line. In other words, when the first surface 10b is divided into two regions with the pressure-sensitive washer center line C1 as the boundary line when viewed along the normal direction of the first surface 10b, the pressure-sensitive member 20 is attached to only the first surface 10b of one of the regions.

[0101] The pressure-sensitive member 20 attached to the first surface 10b covers the confirmation portion 11. That is, the pressure-sensitive member 20 is attached to the first surface 10b in the area where the confirmation portion 11 is formed, of the two areas bounded by the pressure-sensitive washer center line C1.

[0102] The pressure-sensitive washer 1 is disposed in the terminal block body 101 so that the pressure-sensitive washer center line C1 is perpendicular to the width direction of the connection portion 110. That is, the pressure-sensitive washer 1 is disposed in the terminal block body 101 so that the pressure-sensitive washer center line C1 is aligned with the insertion direction of the terminal 200a of the electrical wiring 200. The terminal 200a is inserted along the pressure-sensitive washer center line C1 into the portion between the pressure-sensitive washer 1 and the lower washer 4 where the pressure-sensitive member 20 is not present.

[0103] In the terminal block 100 of the present embodiment 3, the terminal 200a of the electrical wiring 200 is in contact with the pressure-sensitive washer body 10 and the lower washer 4, and therefore the terminal block 100 and the electrical wiring 200 are electrically connected. The other configurations of the terminal block 100 of the present embodiment 3 are the same as those of the terminal block 100 of the embodiment 2, and therefore description thereof will be omitted.

[0104] According to the terminal block 100 of the third embodiment, when the first surface 10b of the pressure-sensitive washer body 10 is viewed along the normal direction of the first surface 10b and the pressure-sensitive washer body 10 is divided into two regions with a line passing through the center of the pressure-sensitive washer body 10 as the boundary line, the pressure-sensitive member 20 is attached only to the first surface 10b of one of the regions. Furthermore, the pressure-sensitive washer 1 is disposed on the terminal block body 101 so that the boundary line is aligned with the insertion direction of the electrical wiring 200 between the pressure-sensitive washer 1 and the lower washer 4. This prevents the electrical wiring 200 from interfering with the pressure-sensitive member 20, thereby preventing damage to the pressure-sensitive member 20. Therefore, the pressure-sensitive washer 1 can be used multiple times in a normal state.

[0105] Embodiment 4 The terminal block 100 according to the fourth embodiment differs from the terminal block 100 according to the second embodiment in that the lower washer 4 is formed with a thin portion 40d and a thick portion 40e.

[0106] 11 is a schematic diagram showing a lower washer 4 according to the fourth embodiment. The lower washer 4 includes a lower washer body 40.

[0107] In the lower washer 4, a straight line along opposing sides that passes through the center of the lower washer through-hole 4a is defined as a lower washer center line C4. The lower washer body 40 has a thin portion 40d on one side and a thick portion 40e on the other side, with the lower washer center line C4 as the boundary line.

[0108] One surface of the lower washer body 40 is the lower body first surface 40b, and the surface opposite the lower body first surface 40b is the lower body second surface 40c. The lower body second surface 40c has a step that serves as the boundary between the thin-walled portion 40d and the thick-walled portion 40e. The lower body first surface 40b is formed as a uniform flat surface.

[0109] A known forming method can be used to form the thick portion 40e. For example, the thick portion 40e may be formed by folding an edge portion of the lower washer body 40 and overlapping it with a part of the lower washer body 40. Furthermore, the thick portion 40e may be formed by fixing a separate member by welding.

[0110] The lower washer 4 is disposed on the connection portion forming surface 101b so that the lower washer center line C4 is perpendicular to the width direction of the connection portion 110. The lower washer 4 is disposed so that the lower main body first surface 40b faces the connection portion forming surface 101b. The lower washer 4 is disposed on the connection portion forming surface 101b so that the thick portion 40e is positioned opposite the pressure-sensitive member 20 attached to the pressure-sensitive washer body 10.

[0111] The terminal 200a of the electrical wiring 200 can be inserted between the pressure-sensitive washer 1 and the lower washer 4 along the lower washer center line C4, avoiding the pressure-sensitive member 20.

[0112] When the terminal 200a is sandwiched between the pressure-sensitive washer 1 and the lower washer 4 and the connection of the electrical wiring 200 to the connection portion 110 is completed, pressure is applied to the pressure-sensitive member 20 by being sandwiched between the thick portion 40e and the pressure-sensitive washer main body 10. Meanwhile, the terminal 200a is inserted and sandwiched between the thin portion 40d and the pressure-sensitive washer main body 10.

[0113] Other configurations of the terminal block 100 in the fourth embodiment are the same as those of the terminal block 100 in the second embodiment, and therefore description thereof will be omitted.

[0114] According to the terminal block 100 of the fourth embodiment, the lower washer 4 is formed with a thin portion 40d and a thick portion 40e, where the thickness of the lower washer 4 is thicker than the thin portion. In addition, a step is formed on the upper surface of the lower washer 4 facing the pressure-sensitive washer 1, which serves as the boundary between the thin portion 40d and the thick portion 40e, and the lower washer 4 is disposed on the terminal block main body 101 so that the thick portion 40e faces the pressure-sensitive member 20. This allows the thick portion 40e to reliably apply pressure to the pressure-sensitive member 20. Therefore, it is possible to reliably confirm that the screw 5 has been tightened.

[0115] Note that the terminal block 100 of the fourth embodiment uses the pressure-sensitive washer 1 and lower washer 4 described in the second embodiment. However, this is not limited to this. For example, the pressure-sensitive washer 1 and lower washer 4 described in the third embodiment may be used. This prevents the electrical wiring 200 from coming into direct contact with the pressure-sensitive member 20, preventing damage to the pressure-sensitive member 20 by the electrical wiring 200 and extending the life of the pressure-sensitive washer 1.

[0116] Furthermore, the pressure-sensitive washer 1 in the first to fourth embodiments is used in a terminal block 100. However, this is not a limitation. The pressure-sensitive washer 1 of the present disclosure can be used as a washer for various applications. For example, it may be used to confirm whether a bolt has been completely tightened between a steel material and a bolt hole formed in the steel material. By using the pressure-sensitive washer 1 between the bolt and the steel material and checking the color of the pressure-sensitive member 20 sandwiched between the steel material and the pressure-sensitive washer, it is possible to easily check whether the bolt has been tightened or loosened. The size, shape, and material of the pressure-sensitive washer body 10 can be appropriately modified depending on the usage situation. Furthermore, even if the color of the pressure-sensitive member 20 changes, the components of the pressure-sensitive member 20 may be adjusted to adapt to the tightening pressure appropriate for each application. Furthermore, the washer may be used not only as a flat washer but also as a washer with various functions, such as a spring washer or a rosette washer.

[0117] Furthermore, the terminal block 100 in the first to fourth embodiments includes four pairs of first connection portions 110A and second connection portions 110B. However, this is not limited to this. It is sufficient that the terminal block 100 includes at least one pair of first connection portions 110A and second connection portions 110B. In other words, the minimum unit of the terminal block 100 is configured to electrically connect a pair of electrical wirings 200 to each other, and by stringing together a plurality of terminal blocks 100, which are the minimum units, the terminal block 100 becomes a terminal block 100 that electrically connects a plurality of pairs of electrical wirings 200 to each other.

[0118] Furthermore, in the second to fourth embodiments, the confirmation section 11 is formed by inserting a sealing member 13 into a confirmation through-hole 10g formed in the pressure-sensitive washer body 10. However, this is not limited to this. The confirmation section 11 may be formed only with the confirmation through-hole 10g without the sealing member 13. In this case, the pressure-sensitive member 20 covering the confirmation through-hole 10g is not subjected to pressure. However, as described above, the pressure-sensitive member 20 surrounding the confirmation through-hole 10g is subjected to pressure and changes color. Therefore, the color change of the pressure-sensitive member 20 surrounding the confirmation through-hole 10g can be confirmed through the confirmation through-hole 10g. Instead of the confirmation through-hole 10g, a notch may be used, in which a portion of the pressure-sensitive washer body 10 is removed from the outer periphery toward the washer body through-hole 10a. Furthermore, a sealing member 13 may or may not be placed in the notch.

[0119] Furthermore, the confirmation portion 11 in the first to fourth embodiments is formed by inserting a sealing member 13 into a confirmation through-hole 10g formed in the pressure-sensitive washer body 10. However, this is not limited to this. For example, the entire pressure-sensitive washer body 10 may be the confirmation portion 11. That is, the pressure-sensitive washer body 10 may be made of a transparent material. Well-known materials such as hard plastic can be used as the transparent material. Note that a pressure-sensitive washer 1 made entirely of hard plastic is not conductive. Therefore, if an electrical connection between the connection portion 110 and the electrical wiring 200 is required, as in the first to fourth embodiments, the screw 5, the upper washer 3, or the lower washer 4 may be electrically connected to the electrical wiring 200.

[0120] In the pressure-sensitive washer 1 according to the first to fourth embodiments, the confirmation portion 11 is the entire pressure-sensitive washer body 10, which is made of a transparent material. This allows the color change of the pressure-sensitive member 20 to be confirmed throughout the entire pressure-sensitive washer 1. This makes it easy to visually confirm that the screw 5 has been tightened.

[0121] Furthermore, the pressure-sensitive washer 1 in the second to fourth embodiments is formed with a confirmation portion 11. However, this is not limited to this. The pressure-sensitive washer 1 does not necessarily have to be formed with a confirmation portion 11. In other words, the worker may check the color of the pressure-sensitive member 20 by looking at the pressure-sensitive member 20 from the side.

[0122] Furthermore, in the pressure-sensitive washer 1 in the first to fourth embodiments, the pressure-sensitive member body 21 covered with the film 23 is adhered to the pressure-sensitive washer body 10. However, this is not limited to this. For example, the pressure-sensitive member body 21 may be attached directly to the pressure-sensitive washer body 10. In this case, for example, the pressure-sensitive member body 21 may be coated on the pressure-sensitive washer body 10. This eliminates the need for a manufacturing step for covering the pressure-sensitive member body 21 with the film 23, allowing the manufacturing step to be omitted.

[0123] Various aspects of the present disclosure are summarized below as appendices.

[0124] (Appendix 1) A pressure-sensitive washer body; a pressure-sensitive member attached to a first surface of the pressure-sensitive washer body; Equipped with The pressure-sensitive member changes color when a predetermined pressure is applied to the pressure-sensitive member. Pressure sensitive washer. (Appendix 2) The pressure-sensitive member has a pressure-sensitive member body that changes color when a predetermined pressure is applied, and a film that covers the pressure-sensitive member body, The film is transparent. A pressure-sensitive washer as described in Appendix 1. (Appendix 3) A confirmation portion is formed on at least a portion of the pressure-sensitive washer body, The color of the pressure-sensitive member can be confirmed through the confirmation portion from a second surface of the pressure-sensitive washer body, which is the surface opposite to the first surface. A pressure-sensitive washer as described in Appendix 1 or Appendix 2. (Appendix 4) The confirmation portion is a notch or a through hole formed in the pressure-sensitive washer body. A pressure-sensitive washer as described in Appendix 3. (Appendix 5) a sealing member made of a transparent material is attached to the notch or the through hole; Pressure-sensitive washers as described in Appendix 4. (Appendix 6) the confirmation portion is the entire pressure-sensitive washer body, The pressure-sensitive washer body is made of a transparent material. A pressure-sensitive washer as described in Appendix 3. (Appendix 7) Equipped with a terminal block body, At least a pair of corresponding connection portions are formed on the terminal block body, Each of the connections includes a pressure-sensitive washer according to any one of claims 1 to 6 and a screw; Electrical wiring can be connected to each of the connection parts by tightening the screws, When the screw is fastened, pressure is applied to the pressure-sensitive member. terminal block. (Appendix 8) Equipped with a terminal block body, At least a pair of corresponding connection portions are formed on the terminal block body, Each of the connecting portions includes a pressure-sensitive washer according to claim 1 or 2, an upper washer disposed above the pressure-sensitive washer, and a screw; The terminal block body corresponding to each of the connection portions has a screw hole formed therein corresponding to the screw, the pressure-sensitive washer is disposed so that the first surface faces the terminal block body, An electrical wiring can be inserted between the upper washer and the pressure-sensitive washer, By fastening the screws passed through the upper washer and the pressure-sensitive washer into the screw holes, the pressure-sensitive member is sandwiched between the pressure-sensitive washer body and the terminal block body, and pressure is applied to the pressure-sensitive member. terminal block. (Appendix 9) Equipped with a terminal block body, At least a pair of corresponding connection portions are formed on the terminal block body, Each of the connecting portions includes a pressure-sensitive washer according to any one of Supplementary Notes 3 to 6, an upper washer disposed above the pressure-sensitive washer, and a screw; The terminal block body corresponding to each of the connection portions has a screw hole formed therein corresponding to the screw, the pressure-sensitive washer is disposed so that the first surface faces the terminal block body, An electrical wiring can be inserted between the upper washer and the pressure-sensitive washer, By fastening the screws passed through the upper washer and the pressure-sensitive washer into the screw holes, the pressure-sensitive member is sandwiched between the pressure-sensitive washer body and the terminal block body, and pressure is applied to the pressure-sensitive member. terminal block. (Appendix 10) The upper washer is formed with a lower confirmation portion, From above the upper washer, the color of the pressure-sensitive member can be confirmed through the lower confirmation portion and the confirmation portion. Terminal blocks as described in Appendix 9. (Appendix 11) Equipped with a terminal block body, At least a pair of corresponding connection portions are formed on the terminal block body, Each of the connecting portions includes a pressure-sensitive washer according to any one of Supplementary Notes 1 to 6, a lower washer disposed below the pressure-sensitive washer, and a screw; The terminal block body corresponding to each of the connection portions has a screw hole formed therein corresponding to the screw, the pressure-sensitive washer is disposed so that the first surface faces the lower washer; An electrical wiring can be inserted between the pressure-sensitive washer and the lower washer, By tightening the screws passed through the pressure-sensitive washer and the lower washer into the screw holes, the pressure-sensitive member is sandwiched between the pressure-sensitive washer body and the lower washer, and pressure is applied to the pressure-sensitive member. terminal block. (Appendix 12) When the first surface of the pressure-sensitive washer body is viewed along a normal direction of the first surface and the pressure-sensitive washer body is divided into two regions with a line passing through the center of the pressure-sensitive washer body as a boundary line, the pressure-sensitive member is attached to only the first surface of one of the regions, The pressure-sensitive washer is disposed on the terminal block body such that the boundary line is aligned along the insertion direction of the electrical wiring between the pressure-sensitive washer and the lower washer. Terminal blocks as described in Appendix 11. (Appendix 13) The lower washer is formed with a thin portion and a thick portion in which the plate thickness of the lower washer is thicker than the thin portion, a step that is a boundary between the thin-walled portion and the thick-walled portion is formed on an upper surface of the lower washer that faces the pressure-sensitive washer, the lower washer is disposed on the terminal block body so that the thick portion faces the pressure-sensitive member. A terminal block as described in Appendix 11 or Appendix 12. [Explanation of symbols]

[0125] 1 pressure-sensitive washer, 1a pressure-sensitive washer through-hole, 3 upper washer, 3a upper washer through-hole, 4 lower washer, 4a lower washer through-hole, 10 pressure-sensitive washer body, 10a washer body through-hole, 10b first surface, 10c second surface, 10g confirmation through-hole, 11 confirmation portion, 13 sealing member, 20 pressure-sensitive member, 20a pressure-sensitive portion through-hole, 21 pressure-sensitive member body, 23 film, 30 upper washer body, 30a upper body through-hole, 30g lower confirmation through-hole, 31 lower confirmation portion, 33 upper washer sealing member, 40 lower washer body, 40a lower body through-hole, 40b lower body first surface, 40c lower body second surface, 40d thin portion, 40e thick portion, 100 terminal block, 101 terminal block body, 101a Wall portion, 101b connection portion forming surface, 101c screw hole, 110 connection portion, 110A first connection portion, 110B second connection portion, 200 electrical wiring, 200a terminal, 200A first electrical wiring, 200B second electrical wiring, C1 pressure-sensitive washer center line, C4 lower washer center line, L1 pressure-sensitive washer length, L3 upper washer length, W connection portion width.

Claims

1. A pressure-sensitive washer body; a pressure-sensitive member attached to a first surface of the pressure-sensitive washer body; Equipped with The pressure-sensitive member changes color when a predetermined pressure is applied to the pressure-sensitive member. Pressure sensitive washer.

2. The pressure-sensitive member has a pressure-sensitive member body that changes color when a predetermined pressure is applied, and a film that covers the pressure-sensitive member body, The film is transparent. The pressure sensitive washer of claim 1 .

3. A confirmation portion is formed on at least a portion of the pressure-sensitive washer body, The color of the pressure-sensitive member can be confirmed through the confirmation portion from a second surface of the pressure-sensitive washer body, which is the surface opposite to the first surface. The pressure sensitive washer of claim 1 .

4. The confirmation portion is a notch or a through hole formed in the pressure-sensitive washer body. The pressure sensitive washer of claim 3.

5. a sealing member made of a transparent material is attached to the notch or the through hole; 5. The pressure sensitive washer of claim 4.

6. the confirmation portion is the entire pressure-sensitive washer body, The pressure-sensitive washer body is made of a transparent material. The pressure sensitive washer of claim 3.

7. Equipped with a terminal block body, At least a pair of corresponding connection portions are formed on the terminal block body, Each of the connecting portions includes a pressure-sensitive washer according to claim 1 and a screw; Electrical wiring can be connected to each of the connection parts by tightening the screws, When the screw is fastened, pressure is applied to the pressure-sensitive member. terminal block.

8. Equipped with a terminal block body, At least a pair of corresponding connection portions are formed on the terminal block body, Each of the connecting portions includes the pressure-sensitive washer according to claim 1, an upper washer disposed above the pressure-sensitive washer, and a screw; The terminal block body corresponding to each of the connection portions has a screw hole formed therein corresponding to the screw, the pressure-sensitive washer is disposed so that the first surface faces the terminal block body, An electrical wiring can be inserted between the upper washer and the pressure-sensitive washer, By fastening the screws passed through the upper washer and the pressure-sensitive washer into the screw holes, the pressure-sensitive member is sandwiched between the pressure-sensitive washer body and the terminal block body, and pressure is applied to the pressure-sensitive member. terminal block.

9. Equipped with a terminal block body, At least a pair of corresponding connection portions are formed on the terminal block body, Each of the connecting portions includes the pressure-sensitive washer according to claim 3, an upper washer disposed above the pressure-sensitive washer, and a screw; The terminal block body corresponding to each of the connection portions has a screw hole formed therein corresponding to the screw, the pressure-sensitive washer is disposed so that the first surface faces the terminal block body, An electrical wiring can be inserted between the upper washer and the pressure-sensitive washer, By fastening the screws passed through the upper washer and the pressure-sensitive washer into the screw holes, the pressure-sensitive member is sandwiched between the pressure-sensitive washer body and the terminal block body, and pressure is applied to the pressure-sensitive member. terminal block.

10. The upper washer is formed with a lower confirmation portion, From above the upper washer, the color of the pressure-sensitive member can be confirmed through the lower confirmation portion and the confirmation portion. The terminal block according to claim 9.

11. Equipped with a terminal block body, At least a pair of corresponding connection portions are formed on the terminal block body, Each of the connecting portions includes the pressure-sensitive washer according to claim 1, a lower washer disposed below the pressure-sensitive washer, and a screw; The terminal block body corresponding to each of the connection portions has a screw hole formed therein corresponding to the screw, the pressure-sensitive washer is disposed so that the first surface faces the lower washer; An electrical wiring can be inserted between the pressure-sensitive washer and the lower washer, By tightening the screws passed through the pressure-sensitive washer and the lower washer into the screw holes, the pressure-sensitive member is sandwiched between the pressure-sensitive washer body and the lower washer, and pressure is applied to the pressure-sensitive member. terminal block.

12. When the first surface of the pressure-sensitive washer body is viewed along a normal direction of the first surface and the pressure-sensitive washer body is divided into two regions with a line passing through the center of the pressure-sensitive washer body as a boundary line, the pressure-sensitive member is attached to only the first surface of one of the regions, The pressure-sensitive washer is disposed on the terminal block body such that the boundary line is aligned along the insertion direction of the electrical wiring between the pressure-sensitive washer and the lower washer. The terminal block according to claim 11.

13. The lower washer is formed with a thin portion and a thick portion in which the plate thickness of the lower washer is thicker than the thin portion, a step that is a boundary between the thin-walled portion and the thick-walled portion is formed on an upper surface of the lower washer that faces the pressure-sensitive washer, the lower washer is disposed on the terminal block body so that the thick portion faces the pressure-sensitive member. The terminal block according to claim 11.

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