Inspection jig

Abstract

To provide an inspection jig that allows for easy inspection of whether or not building components meet standard values. [Solution] The inspection jig 1 is an inspection jig used for inspecting building components, and comprises an open lower case 10, an open upper case 20, and a coil spring 30 positioned between the lower case 10 and the upper case 20. The lower case 10 and the upper case 20 are positioned so that their open sides face each other. The upper case 20 is relatively movable along a direction opposite to the lower case 10 when a load F of building components is applied to it. The coil spring 30 is set so that the upper case 20 reaches a predetermined position when the upper case 20, to which the load F is applied, satisfies predetermined conditions. The lower case 10 is provided with an upper end surface 13a that indicates when the upper case 20 has reached the predetermined position.

Description

Technical Field

[0001] The present invention relates to an inspection jig.

Background Art

[0002] Building fittings must comply with various standards established based on the Building Standard Act and the like. For example, for fire prevention equipment such as fire shutters, the installation of a harm prevention device to prevent people from being caught in the closing fire prevention equipment when a fire is detected is obligated by the Building Standard Act (see Patent Document 1). This harm prevention device is required to meet reference values established based on the Building Standard Act and the like, such that the compressive force and kinetic energy applied when the fire shutter is closed are equal to or less than certain reference values.

Related Art Literature

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] To inspect whether a harm prevention device meets the reference values, it has conventionally been common to use a measuring instrument such as a force gauge that measures the reference values with numerical values. However, the operation of such a measuring instrument requires technical knowledge and experience, making the operation difficult, and the measurement results are affected by the environment in which the measurement is performed, so the measurement conditions must be strictly managed. In addition, there is a concern that high-precision measuring instruments are expensive and incur high costs.

[0005] In view of the above points, the present invention aims to provide an inspection jig that can easily perform an inspection of whether building fittings meet reference values.

Means for Solving the Problems

[0006] The inspection jig according to the present invention is an inspection jig used for inspecting building components, and comprises an open first frame, an open second frame, and an elastic member disposed between the first frame and the second frame, wherein the first frame and the second frame are arranged so that their open sides face each other, the second frame is movable relative to the first frame along the direction opposite to the first frame when a load of the building component is applied, the elastic member is set so that the second frame reaches a predetermined position when the second frame to which the load is applied satisfies predetermined conditions, and at least one of the first frame and the second frame is provided with a reference part that indicates when the second frame has reached the predetermined position. [Effects of the Invention]

[0007] According to the present invention, it is possible to easily inspect whether or not building components meet the standard values. [Brief explanation of the drawing]

[0008] [Figure 1] This is a perspective view showing a first embodiment of the inspection jig according to the present invention. [Figure 2] Figure 1 is a side cross-sectional view showing the upper case without any load applied. [Figure 3] Figure 1 is a side cross-sectional view showing the upper case with a load applied. [Figure 4] This is a perspective view showing a second embodiment of the inspection jig according to the present invention. [Figure 5] Figure 4 is a side cross-sectional view showing the upper case without any load applied. [Figure 6] Figure 4 is a side cross-sectional view showing the upper case with a load applied. [Modes for carrying out the invention]

[0009] The following describes an example of an embodiment of the inspection jig according to the present invention, with reference to the attached drawings. In the following description, the vertical direction is the direction along the central axis O (the central axis of the lower case 10 and the upper case 20) shown in the figure, where the side where the lower case 10 (case) is located is "down" and the side where the upper case 20 is located is "up". The radial direction is the direction perpendicular to the central axis O in a plane perpendicular to the central axis O, and the circumferential direction is the direction of rotation around the central axis O in this plane.

[0010] (First Embodiment) Figure 1 is a perspective view showing inspection jig 1, which is a first embodiment of the inspection jig according to the present invention. Figures 2 and 3 are side cross-sectional views of inspection jig 1. Figure 2 shows the upper case 20 without a load F applied, and Figure 3 shows the upper case 20 with a load F applied. As shown in Figures 1 to 3, inspection jig 1 comprises a lower case 10 (first frame), an upper case 20 (second frame), and a coil spring 30 (elastic member). Inspection jig 1 is used, for example, to inspect whether a hazard prevention device installed in fire protection equipment such as a fire shutter meets predetermined standard values ​​set forth in accordance with the Building Standards Act, etc.

[0011] The lower case 10 is a cylindrical container with a bottom, and the end opposite the bottom is open. The lower case 10 has a stepped cylindrical shape centered on the central axis O. The lower case 10 has a circular plate-shaped bottom wall 11, an outer cylindrical wall 12 erected from the outer edge of the bottom wall 11, and an inner cylindrical wall 13 erected from the upper end of the outer cylindrical wall 12. The outer circumferential surface of the inner cylindrical wall 13 is located radially inward from the outer circumferential surface of the outer cylindrical wall 12. The inner circumferential surface of the inner cylindrical wall 13 and the inner circumferential surface of the outer cylindrical wall 12 are substantially flush. The bottom wall 11, the outer cylindrical wall 12, and the inner cylindrical wall 13 may be integrally formed or formed as separate parts. The material of the lower case 10 is not particularly limited, but hard resin is an example.

[0012] The upper case 20 is a cylindrical container with a bottom, and the end opposite the bottom is open. The upper case 20 and the lower case 10 are arranged so that their open ends face each other. Hereinafter, the direction in which the upper case 20 and the lower case 10 face each other may be simply referred to as the "opposing direction". The upper case 20 has a stepped cylindrical shape centered on the same central axis O as the lower case 10. The upper case 20 has a circular plate-shaped bottom wall 21, an outer cylindrical wall 22 erected from the outer edge of the bottom wall 21, and an inner cylindrical wall 23 erected from the lower end of the outer cylindrical wall 22. The outer circumferential surface of the inner cylindrical wall 23 is located radially inward from the outer circumferential surface of the outer cylindrical wall 22. The inner circumferential surface of the inner cylindrical wall 23 and the inner circumferential surface of the outer cylindrical wall 22 are substantially flush. The bottom wall 21, the outer cylindrical wall 22, and the inner cylindrical wall 23 may be integrally formed or formed as separate parts. The material of the upper case 20 is not particularly limited, but hard resin is one example.

[0013] The outer diameter of the inner cylindrical wall 23 of the upper case 20 is smaller than the inner diameters of the outer cylindrical wall 12 and inner cylindrical wall 13 of the lower case 10, and the inner cylindrical wall 23 of the upper case 20 can be inserted into the inside of the lower case 10. The inner cylindrical wall 23 of the upper case 20 is inserted from the opening side of the lower case 10 and is positioned inside the lower case 10. In other words, the inner cylindrical wall 23 of the upper case 20 constitutes an inner cylindrical portion positioned inside the lower case 10. With the inner cylindrical wall 23 of the upper case 20 positioned inside the lower case 10, an internal space is formed partitioned between the lower case 10 and the upper case 20.

[0014] A gap is formed between the outer surface of the inner cylindrical wall 23 of the upper case 20 and the inner surface of the outer cylindrical wall 12 and inner cylindrical wall 13 of the lower case 10, allowing the upper case 20 to move relative to the lower case 10 in a direction opposite to it. When a load F is applied to the bottom wall 21 from above, the upper case 20 moves downward relative to the lower case 10, resisting the elastic force of the coil spring 30. As the upper case 20 moves downward, the depth to which the inner cylindrical wall 23 of the upper case 20 is inserted into the lower case 10 increases.

[0015] The outer diameter of the outer cylindrical wall 22 of the upper case 20 is larger than the inner diameter of the inner cylindrical wall 13 of the lower case 10, and the outer cylindrical wall 22 of the upper case 20 can come into contact with the inner cylindrical wall 13 of the lower case 10. When the upper case 20 moves downward, it can move until the lower end surface 22a of the outer cylindrical wall 22 of the upper case 20 abuts against the upper end surface 13a of the inner cylindrical wall 13 of the lower case 10.

[0016] The coil spring 30 is disposed between the lower case 10 and the upper case 20. The coil spring 30 is arranged in an internal space defined by the lower case 10 and the upper case 20. The coil spring 30 is disposed inside the inner cylindrical wall 23 of the upper case 20. For example, the coil spring 30 is arranged in a state not fixed to the lower case 10 and the upper case 20, and is easily replaceable with respect to the lower case 10 and the upper case 20. Note that the coil spring 30 may be fixed to at least one of the lower case 10 and the upper case 20.

[0017] The coil spring 30 is formed by spirally winding a wire rod, and has a cylindrical cross-section. The central axis of the coil spring 30 is positioned substantially coinciding with the central axis O of the lower case 10 and the upper case 20. The coil spring 30 is made of spring steel, stainless steel, or the like. The coil spring 30 is set such that the upper case 20 applied with a load F reaches a predetermined position when the upper case 20 satisfies a predetermined condition. Specifically, this setting is realized by adjusting the spring constant by changing the thickness of the wire rod of the coil spring 30, the coil diameter, the number of turns, the material, and the like.

[0018] In the first embodiment, the predetermined position that the upper case 20 reaches when the above predetermined condition is satisfied is a position where the lower end surface 22a of the outer cylindrical wall 22 of the upper case 20 abuts against the upper end surface 13a (abutting portion) of the inner cylindrical wall 13 of the lower case 10. This upper end surface 13a functions as a reference portion indicating that the upper case 20 has reached the predetermined position.

[0019] The predetermined condition is a condition for confirming whether or not the fitting meets the reference value of the fitting defined based on the Building Standards Act and the like. For example, the harm prevention device installed on a fireproof shutter is required to meet the reference values defined based on the Building Standards Act and the like, such that the compressive force and kinetic energy applied when the fireproof shutter is closed are not more than a certain reference value. Specifically, the harm prevention device is required to have a compression load of 150N or less when the fireproof shutter is closed, or a stopping distance, which is the movement distance from when the fireproof shutter senses contact with a person until it stops, of 5 cm or less. Therefore, by setting the predetermined condition as "the load F applied to the upper case 20 is equal to or greater than a predetermined value" or "the movement amount of the upper case 20 to which the load F is applied is equal to or greater than a predetermined value", and setting the predetermined value based on the above reference value, it is possible to inspect whether or not the harm prevention device meets the above reference value. The predetermined value in the predetermined condition may be the reference value (150N or 5cm) of the harm prevention device itself, or may be a numerical value within a range with a margin for the reference value or a numerical value calculated based on the reference value.

[0020] Hereinafter, a specific inspection method using the inspection jig 1 when the predetermined condition is set as "the load F applied to the upper case 20 is 150N or more" will be described. The inspection jig 1 can be used, for example, by being disposed on the floor, which is below the bottom portion (seat plate) at the lowermost part of the fireproof shutter and is in contact with the bottom portion when the fireproof shutter descends. The inspection jig 1 is disposed, for example, at the central portion in the direction in which the surface of the shutter curtain of the fireproof shutter extends. The number and arrangement positions of the inspection jigs 1 are not particularly limited, and for example, a total of three inspection jigs may be disposed at both end portions and the central portion in the direction in which the surface of the shutter curtain extends. Further, the inspection jig 1 may be directly disposed on the floor, or may be disposed with a separately prepared mounting table or the like interposed between the inspection jig 1 and the floor. In the inspection, the fireproof shutter is lowered in a state where the inspection jig 1 is disposed in this manner. The descending method of the fireproof shutter may be an electric descending method, or may be a self-weight descending method in which the speed is controlled by a speed governor or the like.

[0021] When the bottom of the descending fire shutter reaches the upper case 20 and a load F is applied to the bottom wall 21, the upper case 20 moves downward against the elastic force of the coil spring 30, as shown in Figure 3. The upper case 20 moves downward as the load F increases, but when the load F is less than 150N, the lower end surface 22a of the outer cylindrical wall 22 of the upper case 20 is positioned above the upper end surface 13a of the inner cylindrical wall 13 of the lower case 10. In contrast, when the load F is 150N or more, the lower end surface 22a of the outer cylindrical wall 22 of the upper case 20 comes into contact with the upper end surface 13a of the inner cylindrical wall 13 of the lower case 10. Therefore, the inspector can check whether the hazard prevention device meets the above standard value by confirming whether the downward movement of the upper case 20 is within the range in which the lower end surface 22a of the upper case 20 does not come into contact with the upper end surface 13a of the lower case 10. As described above, with inspection jig 1, it is possible to easily inspect whether a fire shutter meets the standards set forth in the Building Standards Act, etc., without having to use numerical measuring devices such as force gauges as in the past.

[0022] Furthermore, according to the inspection jig 1, the reference point indicating that the upper case 20 has reached a predetermined position is the upper end surface 13a of the lower case 10, which is the contact point with the upper case 20. Therefore, it is possible to check whether the lower end surface 22a of the upper case 20 is within the range where it does not contact the upper end surface 13a of the lower case 10 by touch, rather than by visual inspection. Thus, by using the inspection jig 1, inspection can be performed even in environments with poor visibility, such as in the dark. In addition, because the contact point is made up of a surface, it is easier to check whether contact has occurred compared to contact at a point or line.

[0023] Furthermore, since the elastic member in the inspection jig 1 is composed of a coil spring 30, stable elastic characteristics can be obtained, improving the accuracy of the inspection jig 1. In addition, by changing the wire thickness, coil diameter, number of turns, material, etc. of the coil spring 30, the spring constant can be adjusted appropriately and easily.

[0024] Furthermore, with the inspection jig 1, the coil spring 30 is positioned in an internal space partitioned by the lower case 10 and the upper case 20, which protects the coil spring 30 from the external environment, allows the inspection jig 1 to be made smaller, and makes it easy to transport the inspection jig 1 to the site.

[0025] Furthermore, according to the inspection jig 1, the coil spring 30 is positioned inside the inner cylindrical wall 23 of the upper case 20, which is located inside the lower case 10. This prevents the central axis of the coil spring 30 from shifting in the direction along the central axis O of the lower case 10 and the upper case 20, allowing the inspection jig 1 to operate stably.

[0026] Furthermore, since the lower case 10 and upper case 20 of the inspection jig 1 are containers with bottoms, the stability of the inspection jig 1 when placed on the floor or a platform is improved.

[0027] (Second embodiment) Figure 4 is a perspective view showing inspection jig 1A, which is a second embodiment of the inspection jig according to the present invention. Note that the coil spring 300 is not shown in Figure 4. Figures 5 and 6 are side cross-sectional views of Figure 4. Figure 5 shows the upper case 200 without a load F applied, and Figure 6 shows the upper case 200 with a load F applied. In the following description, parts common to the first embodiment are denoted by the same reference numerals in the drawings and detailed descriptions are omitted.

[0028] As shown in Figures 4 to 6, the inspection jig 1A comprises a lower case 100 (first frame), an upper case 200 (second frame), a coil spring 300 (elastic member), and a mounting base 40. The mounting base 40 is a rectangular plate provided for stability when using the inspection jig 1A, but the inspection jig 1A does not necessarily have to include the mounting base 40.

[0029] The lower case 100 is a cylindrical container with a bottom, and the opposite side from the bottom is open. The lower case 100 is cylindrical with a central axis O. The lower case 100 has a circular plate-shaped bottom wall 111 and a cylindrical wall 112 erected from the outer edge of the bottom wall 111. The material of the lower case 100 is not particularly limited, but hard resin is one example. A reference line 112a extending around the entire circumference is provided on the outer surface of the cylindrical wall 112 of the lower case 100. In Figures 5 and 6, the height position corresponding to this reference line 112a is indicated by a dashed line.

[0030] The upper case 200 is a cylindrical container with a bottom, and the end opposite the bottom is open. The upper case 200 and the lower case 100 are arranged so that their open ends face each other. The upper case 200 is cylindrical with the same central axis O as the lower case 100. The upper case 200 has a circular plate-shaped bottom wall 221 and a cylindrical wall 222 that is erected from the outer edge of the bottom wall 221. The material of the upper case 200 is not particularly limited, but hard resin is one example.

[0031] The outer diameter of the cylindrical wall 112 of the lower case 100 is smaller than the inner diameter of the cylindrical wall 222 of the upper case 200, so that the cylindrical wall 112 of the lower case 100 can be inserted into the upper case 200. The cylindrical wall 112 of the lower case 100 is inserted from the opening side of the upper case 200 and is positioned inside the upper case 200. In other words, the cylindrical wall 112 of the lower case 100 constitutes an inner cylindrical portion positioned inside the upper case 200. With the cylindrical wall 112 of the lower case 100 positioned inside the upper case 200, an internal space is formed partitioned by the lower case 100 and the upper case 200.

[0032] A gap is formed between the outer surface of the cylindrical wall 112 of the lower case 100 and the inner surface of the cylindrical wall 222 of the upper case 200, allowing the upper case 200 to move relative to the lower case 100 in a direction opposite to it. When a load F is applied to the bottom wall 21 from above downwards, the upper case 200 moves downwards relative to the lower case 100, resisting the elastic force of the coil spring 300. As the upper case 200 moves downwards, the depth to which the cylindrical wall 112 of the lower case 100 is inserted into the upper case 200 increases.

[0033] The coil spring 300 is located between the lower case 100 and the upper case 200, in the internal space partitioned by the lower case 10 and the upper case 20. The coil spring 300 is located inside the cylindrical wall 112 of the lower case 100. The coil spring 300 has the same configuration as the coil spring 30, and the central axis of the coil spring 300 is located approximately coincidentally with the central axis O of the lower case 100 and the upper case 200. The coil spring 300 is set so that the upper case 200 reaches a predetermined position when a load is applied to the upper case 200 and predetermined conditions are met.

[0034] In the second embodiment, the predetermined position that the upper case 200 reaches when the above predetermined conditions are met is the position where the lower end surface 222a of the cylindrical wall 222 of the upper case 200 reaches the reference line 112a of the cylindrical wall 112 of the lower case 100. This reference line 112a functions as a reference point indicating that the upper case 200 has reached the predetermined position. The predetermined conditions are the same as in the first embodiment, and below, a specific inspection method using the inspection jig 1A when the predetermined condition is set to "the load applied to the upper case 20 is 150N or more" will be described.

[0035] Similar to the first embodiment, the inspection jig 1A can be used by positioning it below the bottom (seat plate) at the lowest part of the fire shutter, and placing the mounting platform 40 on the floor that the bottom contacts when the shutter is lowered. The number and position of the inspection jigs 1A are not particularly limited, as in the first embodiment. For inspection, the fire shutter is lowered with the inspection jigs 1A positioned in this manner.

[0036] When the bottom of the descending fire shutter reaches the upper case 200 and a load F is applied to the bottom wall 221, the upper case 200 moves downward against the elastic force of the coil spring 300, as shown in Figure 6. The upper case 200 moves downward as the load F increases, but when the load F is less than 150N, the lower end surface 222a of the cylindrical wall 222 of the upper case 200 is above the reference line 112a (height position shown by the dashed line) of the cylindrical wall 112 of the lower case 100. In contrast, when the load F is 150N or more, the lower end surface 222a of the cylindrical wall 222 of the upper case 200 reaches the reference line 112a of the cylindrical wall 112 of the lower case 100. Therefore, the inspector can check whether the hazard prevention device meets the above standard value by confirming whether the descent of the upper case 200 is within the range where it does not reach the reference line 112a of the lower case 100. As described above, with the inspection jig 1A, similar to the first embodiment, it is possible to easily inspect whether a fire shutter meets the standards set forth in accordance with the Building Standards Act, etc.

[0037] Furthermore, according to the inspection jig 1A, the reference point indicating that the upper case 200 has reached a predetermined position is formed by the reference line 112a of the cylindrical wall 112 of the lower case 100. With such a simple configuration, it is possible to easily visually confirm whether the downward movement of the upper case 200 is within a range where it does not reach the reference line 112a of the lower case 100.

[0038] Although an example of an embodiment embodying the present invention has been described above with reference to Figures 1 to 6, the above-described embodiment may be modified as follows.

[0039] For example, the lower case 10 does not have to be a stepped cylindrical shape, and may be a simple cylindrical shape without an inner cylindrical wall 13. Also, the shapes of the lower cases 10, 100 and the upper cases 20, 200 may be other shapes such as rectangular parallelepipeds or rectangular tubes, rather than cylindrical. Furthermore, the lower cases 10, 100 and the upper cases 20, 200 do not have to be container-shaped, and do not have to be bottomed as long as the coil springs 30, 300 can perform the above function between the lower cases 10, 100 and the upper cases 20, 200. For example, when placed on a floor or a stand, the floor or stand may be used as the bottom of the lower case 10, 100.

[0040] The coil springs 30,300 may have portions that are exposed from the internal space partitioned by the lower cases 10,100 and the upper cases 20,200, or they may not be located in the internal space. For example, the coil springs 30,300 may be located outside the lower cases 10,100 and the upper cases 20,200, connecting the lower cases 10,100 and the upper cases 20,200. Furthermore, the elastic member provided in the inspection jig 1,1A is not limited to the coil springs 30,300, but may be any member that has elastic properties that deform when a load is applied and return to its original shape when the load is removed, such as a leaf spring.

[0041] The reference point indicating that the upper cases 20,200 have reached a predetermined position is not limited to the above embodiment. For example, a projection may be provided on the upper end surface 13a of the lower case 10 that the upper case 20 abuts against, and this projection may be used as the reference point. Also, the reference line 112a of the lower case 100 does not have to extend over the entire circumference of the outer surface of the cylindrical wall 112, it may be partially interrupted, and multiple reference lines may be provided at predetermined intervals. In addition to or instead of the reference line 112a provided on the cylindrical wall 112 of the lower case 100, there may be marks indicating the position such as points, arrows, or symbols. Furthermore, the reference point indicating that the upper cases 20,200 have reached a predetermined position may be provided on the upper case 20,200 side rather than the lower case 10,100 side, or it may be provided on both the lower case 10,100 and the upper case 20,200.

[0042] In the second embodiment, a cylindrical member may be provided to temporarily record the position reached by the upper case 200. For example, a cylindrical or ring-shaped cylindrical member without a bottom wall is installed on the outer circumference of the cylindrical wall 112 of the lower case 100, so as to be slidable against the outer surface of the cylindrical wall 112 and not to be pushed down by its own weight due to friction. During inspection, this cylindrical member is initially moved upward until it contacts the lower end surface 222a of the cylindrical wall 222 of the upper case 200. When a downward load F is applied to the upper case 200, the upper case 200 moves downward against the elastic force of the coil spring 300, and the cylindrical wall 222 of the upper case 200 pushes down this cylindrical member. After the load F is removed and the upper case 200 moves upward due to the elastic force of the coil spring 300 and returns to its original position, this cylindrical member is held in the pushed-down position. In this way, by providing the cylindrical member, the position reached by the upper case 200 can be temporarily recorded.

[0043] Furthermore, the inspection fixtures 1,1A may include a detection unit that detects when the upper cases 20,200 reach a predetermined position and outputs that this detection has occurred. This detection unit may consist of, for example, a microswitch (sensor), an electrical circuit, a battery, an output unit, etc. In this configuration, when the microswitch detects that the upper cases 20,200 have reached a predetermined position, the electrical circuit that receives the signal from the microswitch controls the output unit, such as an LED or a buzzer, to output information. With this configuration, it is easy to confirm that the upper cases 20,200 have reached a predetermined position by the output of this information.

[0044] The method of using the inspection fixtures 1,1A is not limited to the embodiments described above. For convenience, this specification and other documents describe the fixtures in the orientation shown in the drawings, but this does not limit the orientation in which the inspection fixtures according to the present invention are used. For example, the inspection fixtures 1,1A may be inverted so that the lower cases 10,100 are on the upper side and the upper cases 20,200 are on the lower side (floor side). Alternatively, the inspection fixtures 1,1A may be attached to the object to be inspected, such as a fire shutter, rather than being placed on the floor. In this case, for example, the lower case 10,100 side of the inspection fixture 1,1A is attached to the bottom of the fire shutter, and the fire shutter is lowered. When the upper case 20,200 of the inspection jig 1,1A attached to the bottom of the descending fire shutter reaches the floor, a load F is applied to the bottom wall 21,221, and it moves upward relative to the lower case 10,100 while resisting the elastic force of the coil spring 30,300. When the predetermined conditions are met, the upper case 20,200 reaches the predetermined position, thereby achieving the same effect as in the above embodiment.

[0045] Furthermore, in the above embodiment, the case where the predetermined condition is "the load F applied to the upper case 20 is 150N or more" was specifically described, but the predetermined condition is not limited to such load-related conditions, and may also be a kinetic energy-related condition such as "the amount of movement of the upper case with the load applied is greater than or equal to a predetermined value." When such conditions are set, for example, if the amount of movement of the upper case is less than the predetermined value, the upper case may not reach the contact surface or reference line of the lower case, while if the amount of movement of the upper case is greater than or equal to the predetermined value, the upper case may reach the contact surface or reference line of the lower case. In addition, the predetermined condition is not limited to conditions for satisfying standard values ​​established based on the Building Standards Act, etc., as described in the above embodiment, but may also be, for example, a condition for confirming whether or not the standard value for opening and closing force of building components as defined in the Japanese Industrial Standards (JIS standards) is met. Furthermore, the standard value of the predetermined condition is not limited to domestic standard values, but may also be a standard value established in a foreign country or an international standard standard value. Furthermore, the standard value of the predetermined condition is not limited to legal regulations, but may also be set considering voluntary standards independently set by companies or industries, conditions based on contracts between companies, sales conditions, etc.

[0046] Furthermore, although the above embodiment described an example in which the inspection object of the inspection jig 1,1A is a fire shutter, the inspection object of the inspection jig according to the present invention is not limited to fire shutters, but may also be fire protection equipment other than fire shutters, such as fire doors, escape doors, sashes, elevator doors, and other building components.

[0047] The drawings are schematic, and the thickness, width, and proportions of each part are not limited to those shown in the drawings. Furthermore, the ordinal numbers used in this specification are for convenience in distinguishing components and do not indicate order or priority.

[0048] (Note) This specification discloses the following technologies in one aspect. The reference numerals listed below correspond to those used in the accompanying drawings, but are provided as examples only and are not intended to limit the inventions of this application.

[0049] (Technology 1) An inspection jig (1,1A) used for inspecting joinery, The first frame (10,100) with an opening, The opened second frame (20,200), The device comprises an elastic member (30, 300) positioned between the first frame (10, 100) and the second frame (20, 200), The first frame (10,100) and the second frame (20,200) are arranged so that their opening sides face each other. The second frame (20,200) is movable relative to the first frame (10,100) along the opposing direction when the load (F) of the joinery is applied. The elastic member (30,300) is configured such that the second frame (20,200) reaches a predetermined position when the second frame (20,200) to which the load (F) is applied satisfies predetermined conditions. An inspection jig (1,1A) is provided with reference parts (13a,112a) on at least one of the first frame (10,100) and the second frame (20,200) to indicate that the second frame (20,200) has reached the predetermined position.

[0050] According to Technology 1, when the load of the joinery is applied to the second frame, the second frame moves relative to the first frame in a direction opposite to the elastic force of the elastic member. Then, if predetermined conditions are met, the second frame reaches a predetermined position. Since a reference part is provided on at least one of the first and second frames to indicate that the second frame has reached a predetermined position, this reference part allows for confirmation of whether the amount of movement of the second frame is within a range where it does not reach a predetermined position, that is, confirmation of whether predetermined conditions are met. This makes it possible to easily inspect whether the joinery meets the reference value as a predetermined condition.

[0051] (Technology 2) The reference portion (112a) is a mark indicating that the position of the second frame (200) has reached the predetermined position. The inspection jig (1A) described in Technical 1.

[0052] Technology 2 allows for easy visual confirmation of whether the movement in the second frame falls within a range that does not reach the mark, thanks to the simple configuration of placing a mark.

[0053] (Technology 3) The first frame (10) has a contact portion (13a) that the second frame (20) comes into contact with when it reaches the predetermined position. The reference portion is the contact portion (13a), The inspection jig (1) described in Technical 1.

[0054] With Technique 3, it is possible to check whether the movement of the second frame is within a range that does not come into contact with the first frame by touch, without relying on visual inspection. Therefore, according to Technique 3, inspection can be performed even in environments with poor visibility, such as in dark places.

[0055] (Technology 4) The predetermined conditions are that the load (F) applied to the second frame (20,200) is greater than or equal to a predetermined value, or that the amount of movement of the second frame (20,200) to which the load (F) is applied is greater than or equal to a predetermined value. An inspection jig (1,1A) as described in any of the following technical specifications (1-3).

[0056] Technology 4 allows for a suitable inspection of whether the magnitude of the load and kinetic energy of the building components meet predetermined standard values.

[0057] (Technology 5) The elastic member (30, 300) is a coil spring whose axis is positioned along the direction in which the first frame (10, 100) and the second frame (20, 300) face each other. An inspection jig (1,1A) as described in any of the following technical specifications (1-3).

[0058] Technology 5 allows for stable elastic properties and improved accuracy of inspection fixtures. Furthermore, by adjusting the spring constant by changing the wire thickness, coil diameter, number of turns, and material of the coil spring, the elastic properties can be set appropriately and easily.

[0059] (Technology 6) The elastic members (30,300) are arranged in the internal space partitioned by the first frame (10,100) and the second frame (20,200). An inspection jig (1,1A) as described in any of the following technical specifications (1-3).

[0060] Technology 6 allows for the protection of elastic components from the external environment, and also enables the miniaturization of inspection jigs, making them easily transportable to the site.

[0061] (Technology 7) The first frame (10, 100) and the second frame (20, 200) are cylindrical, and each has an inner cylindrical portion (13, 112) which is located inside the other. The elastic members (30, 300) are positioned inside the inner cylindrical portions (13, 112). An inspection jig (1,1A) as described in any of the following technical specifications (1-3).

[0062] Technology 7 suppresses the shifting of the central axis of the elastic member in the direction along the central axes of the first and second frames, thereby enabling stable operation of the inspection jig.

[0063] (Technology 8) The first frame (10,100) and the second frame (20,200) are bottomed containers. An inspection jig (1,1A) as described in any of the following technical specifications (1-3).

[0064] Technology 8 improves the stability of the inspection fixture when it is placed on the floor or a mounting platform, as the first and second frames are bottomed containers.

[0065] Although one embodiment of the present invention has been described above, the present invention is not limited to such specific embodiments, and unless otherwise specifically limited in the above description, various modifications and changes are possible within the scope of the spirit of the present invention as described in the claims. For example, the configuration of the above-described embodiment can be added or deleted as appropriate, and the configuration of one embodiment can be provided in other embodiments. Furthermore, the effects in the above-described embodiment are merely illustrative of the effects that may result from the present invention. In other words, the effects of the present invention are not limited to the above-described effects, and additional effects may also be produced in addition to the above-described effects. [Explanation of Symbols]

[0066] 1,1A: Inspection fixture 10,100: Lower case (first frame) 13: Inner cylindrical wall (inner cylindrical part) 13a: Upper end surface (reference part) 112: Cylindrical wall (inner cylindrical part) 112a: Reference line (reference part) 20,200: Upper case (2nd frame) 30,300: Coil spring (elastic component) F: Load O: Axis line

Claims

1. An inspection jig used for inspecting joinery, The first frame with an opening, The second frame has an opening, The device comprises an elastic member disposed between the first frame and the second frame, The first frame and the second frame are arranged so that their opening sides face each other. The second frame is movable relative to the first frame along the direction opposite to the first frame when the load of the joinery is applied, The elastic member is configured such that the second frame reaches a predetermined position when the second frame to which the load is applied satisfies predetermined conditions. An inspection jig, wherein at least one of the first frame and the second frame is provided with a reference section that indicates when the second frame has reached the predetermined position.

2. The reference portion is a mark indicating that the position of the second frame has reached the predetermined position. The inspection jig according to claim 1.

3. The first frame has a contact portion that the second frame, upon reaching the predetermined position, contacts, The reference portion is the contact portion, The inspection jig according to claim 1.

4. The predetermined conditions are that the load applied to the second frame is equal to or greater than a predetermined value, or that the amount of movement of the second frame to which the load is applied is equal to or greater than a predetermined value. An inspection jig according to any one of claims 1 to 3.

5. The elastic member is a coil spring whose axis is positioned along the direction in which the first frame and the second frame face each other. An inspection jig according to any one of claims 1 to 3.

6. The elastic member is located in the internal space partitioned by the first frame and the second frame. An inspection jig according to any one of claims 1 to 3.

7. The first frame and the second frame are cylindrical, and each has an inner cylindrical portion located inside the other. The elastic member is positioned inside the inner cylindrical portion. An inspection jig according to any one of claims 1 to 3.

8. The first frame and the second frame are containers with bottoms. An inspection jig according to any one of claims 1 to 3.

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