Attachment unit

Abstract

To provide an attachment unit capable of properly attaching an attachment object fixture by corresponding to various wall surfaces.SOLUTION: An attachment unit is such that: a first fastening hole and a circular arc second fastening hole are disposed in a base member 5 fixed to an inner wall surface 3 of a tunnel; a third fastening hole and a fourth fastening hole are disposed in a moving member 6 for supporting a display lamp fixture 2; and the rotary posture of the moving member 6 to the base member 5 around the central position of the first fastening hole can be adjusted in a state where a first bolt is inserted into the first fastening hole and the third fastening hole, and a second bolt is inserted into the second fastening hole and the fourth fastening hole. With this, the rotary posture of the display lamp fixture 2 to the inner wall surface 3 of the tunnel can be adjusted, and the display lamp fixture 2 can be properly attached to various inner wall surfaces 3 by one type of the attachment unit 1.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a mounting unit for mounting a target fixture (e.g., a display light fixture) on a wall surface (e.g., the inner wall surface of a tunnel). In particular, the present invention relates to an improvement for realizing a mounting unit that can properly mount the target fixture on various wall surfaces. [Background technology]

[0002] Conventionally, mounting brackets made by bending metal sheets have been used as a means for mounting indicator lamps, etc., on the inner wall surface of a tunnel, for example. Figure 11 shows an indicator lamp b mounted on the inner wall surface c of a tunnel using a conventional mounting bracket a. Figure 11 shows the case where indicator lamp b is an emergency exit indicator lamp (also called an emergency exit guide lamp).

[0003] As shown in Fig. 11, the conventional mounting bracket a is made by bending a single sheet metal, and is configured to include a vertical plate portion d extending vertically (a vertical plate portion inserted between stays b1, b1 extending from an indicator light device b), an upper horizontal plate portion e extending horizontally from the upper end of the vertical plate portion d toward the inner wall surface c of the tunnel, an upper inclined plate portion f bent upward at a predetermined angle (inclined angle along the inner wall surface c of the tunnel) from the tip of the upper horizontal plate portion e, a lower horizontal plate portion g extending horizontally from the lower end of the vertical plate portion d toward the inner wall surface c of the tunnel, and a lower inclined plate portion h bent downward at a predetermined angle (inclined angle along the inner wall surface c of the tunnel) from the tip of the lower horizontal plate portion g. An anchor bolt insertion hole (not shown) is formed in each of the upper inclined plate portion f and the lower inclined plate portion h. The indicator light device b is attached to the mounting bracket a by fastening the upper horizontal plate portion e and the lower horizontal plate portion g to the stays b1, b1, respectively, and the mounting bracket a is fixed to the inner wall surface c of the tunnel by inserting anchor bolts i, i driven into the anchor bolt insertion holes of the upper inclined plate portion f and the lower inclined plate portion h, respectively, and screwing a nut j into the anchor bolt i.

[0004] Patent Document 1 also discloses a metal fitting for supporting a tunnel lighting fixture. This metal fitting is configured with a main body that contacts the upper or lower surface of the tunnel lighting fixture, and a support part that is bent from the front end of the main body so as to fit along the front end of the tunnel lighting fixture and supports the tunnel lighting fixture. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2000-11704 A Summary of the Invention [Problem to be solved by the invention]

[0006] Incidentally, it is required that the indicator light device be properly attached (e.g., without tilting) to the inner wall surface of the tunnel outside the construction gauge range (outside the construction gauge range shown by the two-dot chain line in Figure 11). In order to meet this requirement, the conventional mounting bracket a was manufactured according to the shape (inclination angle, etc.) of the inner wall surface c of the tunnel. In other words, it was necessary to design the dimensions and inclination angles of each part of the mounting bracket a based on the cross-sectional view of each tunnel so that the indicator light device b can be properly attached outside the construction gauge range. For example, it was necessary to design the dimensions (horizontal dimensions) of the upper horizontal plate part e and the lower horizontal plate part g and the inclination angles of the upper inclined plate part f and the lower inclined plate part h for each tunnel and then manufacture the mounting bracket a. In other words, the mounting bracket a was designed and manufactured as a dedicated member for each tunnel.

[0007] For this reason, when designing and manufacturing mounting bracket a, work was required to share information about the cross section of each tunnel between multiple contractors (for example, the contractor ordering mounting bracket a and the contractor designing and manufacturing it), which required a lot of man-hours and was cumbersome. In addition, for the contractor designing and manufacturing mounting bracket a, it was necessary to design and manufacture dedicated mounting bracket a for each tunnel, which was also cumbersome work.

[0008] Furthermore, there is no guarantee that the tunnel's inner wall surface c is constructed in the shape as designed, and it may be deviated from the designed shape. Therefore, if the indicator light fixture b is attached to the inner wall surface c with this deviation via the mounting bracket a (the mounting bracket is made on the assumption that the tunnel's inner wall surface c is constructed in the designed shape), there is a risk that the indicator light fixture b cannot be attached properly (for example, the indicator light fixture b may tilt).

[0009] Problems resulting from the use of such mounting bracket a are not limited to cases where an indicator light device b is attached to the inner wall surface c of a tunnel, but may also occur when other devices (hereinafter sometimes referred to as the target device) are attached to the inner wall surface c of a tunnel, or when the target device is attached to a wall surface other than a tunnel. Similar problems may also occur with the configuration disclosed in Patent Document 1.

[0010] The present invention has been made in consideration of the above points, and its object is to provide a mounting unit that enables the device to be properly mounted on various wall surfaces (in the case of an indicator light device to be mounted on the inner wall surface of a tunnel, it can be properly mounted outside the building limit range). [Means for solving the problem]

[0011] The solution of the present invention for achieving the above object is based on a mounting unit for mounting a target device to a wall surface, and the mounting unit includes a base member fixed to the wall surface, and a movable member integrally assembled to the base member by a fastener and supporting the target device, wherein one of the base member and the movable member is provided with a first fastening hole and a second fastening hole having an arc shape centered on the center position of the first fastening hole, and the other of the base member and the movable member is provided with a third fastening hole corresponding to the first fastening hole and a fourth fastening hole corresponding to the second fastening hole, and when a first fastener is inserted through the first fastening hole and the third fastening hole and a second fastener is inserted through the second fastening hole and the fourth fastening hole, a rotational attitude of the movable member relative to the base member is adjustable within a range in which the second fastener can move along the inside of the second fastening hole with the center position of the first fastening hole as a rotational center.

[0012] Due to this specification, when the movable member (the movable member supporting the mounting target device) is assembled to the base member fixed to the wall surface, the first fastener is inserted through the first fastening hole and the third fastening hole, and the second fastener is inserted through the second fastening hole and the fourth fastening hole. In the preliminary stage of the fastening operation (tightening operation) of each fastener, the rotational attitude of the movable member with respect to the base member can be adjusted within a range in which the second fastener can move along the inside of the second fastening hole (arc-shaped hole) with the center position of the first fastening hole as the rotational center. In other words, by adjusting the rotational attitude of the movable member, the rotational attitude of the mounting target device with respect to the wall surface can be changed (adjusted). By performing the fastening operation of each fastener with the rotational attitude of the mounting target device adjusted in this way, the mounting target device is attached to the wall surface with its rotational attitude with respect to the wall surface optimized.

[0013] Therefore, according to the mounting unit of the present solution, it is not necessary to design and prepare mounting brackets individually according to the type of wall surface (for example, the inclination angle of the wall surface) as in the conventional technology, and it is possible to properly mount the target device on various wall surfaces with one type of mounting unit, and it is possible to standardize the mounting unit corresponding to various wall surfaces. As a result, it is no longer necessary to share information about the wall surface among multiple contractors, which was necessary when designing and preparing the conventional mounting brackets, or to design and prepare dedicated mounting brackets for each type of wall surface, and it is possible to significantly improve the work. Furthermore, even if the wall surface is not constructed in the designed shape, it is possible to properly mount the target device by adjusting the rotational posture of the movable member as described above.

[0014] Moreover, the third fastening hole and the fourth fastening hole are each configured as an elongated hole extending in a direction perpendicular to the insertion direction of the first fastener and the second fastener, respectively, and parallel to each other.

[0015] This makes it possible to change the relative position of the movable member with respect to the base member along the extending direction of the third fastening hole and the fourth fastening hole (the longitudinal direction of the long hole). That is, not only can the rotational attitude of the attachment target tool with respect to the wall surface be adjusted as described above, but also the relative position of the attachment target tool with respect to the wall surface (the relative position in the direction along the longitudinal direction of the long hole: the distance between the wall surface) can be adjusted. For example, when the attachment target tool is attached to the inner wall surface of a tunnel, the position of the attachment target tool with respect to the inner wall surface of the tunnel can be adjusted so that the attachment target tool is located outside the construction gauge range (the position of the attachment target tool is adjusted to be located outside the construction gauge range by moving it closer to the inner wall surface of the tunnel), or the attachment target tool is adjusted to a position where it does not interfere with the inner wall surface of the tunnel (curved surface or inclined surface) (the position of the attachment target tool is adjusted to be located away from the inner wall surface of the tunnel so that it does not interfere with the inner wall surface of the tunnel).

[0016] In addition, each of the third fastening hole and the fourth fastening hole is composed of a plurality of round holes arranged at a predetermined interval in a direction perpendicular to the insertion direction of the first fastener and the second fastener, respectively.

[0017] According to this, by selecting the third fastening hole through which the first fastening tool is inserted (selecting any of the multiple round holes constituting the third fastening hole), and by selecting the fourth fastening hole through which the second fastening tool is inserted (selecting any of the multiple round holes constituting the fourth fastening hole), it is possible to change the relative position of the movable member with respect to the base member in a direction perpendicular to the insertion direction of each of the first fastening tool and the second fastening tool. In other words, in this case as well, not only can the rotational attitude of the attachment target tool with respect to the wall surface be adjusted as described above, but also the relative position of the attachment target tool with respect to the wall surface (the distance between the wall surface) can be adjusted.

[0018] The movable member also has a support plate portion that supports the attachment target device, and the support plate portion is provided with a fifth fastening hole for fastening the attachment target device, and the fifth fastening hole is configured as a long hole extending in a direction perpendicular to the insertion direction of each of the first fastening tool and the second fastening tool.

[0019] According to this, when the target instrument is supported (supported by fastening) on ​​the support plate part of the movable member, the relative position of the target instrument with respect to the support plate part can be changed along the extension direction of the fifth fastening hole (longitudinal direction of the long hole). That is, not only can the rotational posture of the target instrument with respect to the wall surface be adjusted as described above, but the position of the target instrument can be changed along the extension direction of the fifth fastening hole. For example, when the support plate part extends along the vertical direction, the position of the target instrument (the position supported by the movable member) can be adjusted in the vertical direction. Therefore, when the target instrument is attached to the inner wall surface of a tunnel, the mounting height position of the target instrument can be adjusted so that the target instrument is positioned outside the building limit range (the mounting height position of the target instrument is adjusted to be positioned outside the building limit range by increasing the mounting height position of the target instrument), or the target instrument can be adjusted to a position where it does not interfere with the inner wall surface of the tunnel (the mounting height position of the target instrument is adjusted to a position where the upper end of the target instrument does not interfere with the inner wall surface of the tunnel by decreasing the mounting height position of the target instrument).

[0020] The first fastening hole is open at an outer edge of one of the base member and the movable member in which the first fastening hole is provided.

[0021] According to this, in a stage prior to assembling the movable member to the base member, the first fastener is inserted through the third fastening hole, and in this state, the first fastener is fitted into the open portion of the first fastening hole, thereby assembling the movable member to the base member. This makes it possible to obtain a configuration in which the first fastener is inserted through the first fastening hole and the third fastening hole. In other words, it is possible to obtain a configuration in which the first fastener is inserted through the first fastening hole and the third fastening hole without the need for a complicated operation of inserting the first fastener through these fastening holes in a state in which the first fastening hole and the third fastening hole are aligned in advance. This makes it possible to simplify the operation of assembling the movable member to the base member.

[0022] Moreover, the wall surface is an inner wall surface of a tunnel.

[0023] Generally, the inner wall surface of a tunnel is curved or inclined. When mounting a target device on the inner wall surface of a tunnel, the target device must be mounted without tilting outside the construction limit range of the tunnel. As described above, in the conventional technology, in order to meet this requirement, it was necessary to design and manufacture a mounting bracket for each tunnel. However, with the mounting unit according to the present solution, by adjusting the rotational attitude of the movable member relative to the base member, it is possible to adjust the rotational attitude of the target device and mount it properly regardless of the curved shape or inclination angle of the inner wall surface of the tunnel, and it is possible to standardize the mounting unit to correspond to various wall surfaces.

[0024] The following configuration can also be cited as another means for solving the above-mentioned problem. That is, the present invention is based on a mounting unit for mounting a target device to a wall surface. The mounting unit includes a base member fixed to the wall surface, and a movable member integrally assembled to the base member by a fastener and supporting the target device, one of the base member and the movable member is provided with a first fastening hole and a second fastening hole, the other of the base member and the movable member is provided with a third fastening hole corresponding to the first fastening hole and a fourth fastening hole corresponding to the second fastening hole, a first fastener is inserted through the first fastening hole and the third fastening hole, a second fastener is inserted through the second fastening hole and the fourth fastening hole, and the third fastening hole and the fourth fastening hole are elongated holes extending in a direction perpendicular to the insertion direction of the first fastener and the second fastener, respectively, and parallel to each other.

[0025] According to this feature, as described above, the relative position of the attachment target device with respect to the wall surface (the relative position in the direction along the longitudinal direction of the long hole: the distance from the wall surface) can be adjusted.

[0026] The following configuration can also be cited as another means for solving the above-mentioned problem. That is, the present invention is based on a mounting unit for mounting a target device to a wall surface. The mounting unit includes a base member fixed to the wall surface, and a movable member that is integrally assembled to the base member by a fastener and supports the target device, the base member is provided with a base-side fastening hole, the movable member is provided with a movable-side fastening hole corresponding to the base-side fastening hole, and a fastener is inserted through the base-side fastening hole and the movable-side fastening hole, the movable member has a support plate portion that supports the target device, the support plate portion is provided with a fifth fastening hole for fastening the target device, and the fifth fastening hole is an elongated hole extending in a direction perpendicular to the insertion direction of the fastener.

[0027] According to this specification, as described above, when the attachment target device is supported on the support plate portion of the movable member (supported by fastening), the relative position of the attachment target device with respect to the support plate portion can be changed in the extension direction of the fifth fastening hole (longitudinal direction of the long hole). Effect of the Invention

[0028] In the present invention, a mounting unit for mounting a target tool on a wall surface is composed of a base member fixed to the wall surface and a movable member integrally assembled to the base member by a fastener and supporting the target tool, and a first fastening hole and an arc-shaped second fastening hole are provided on one of the base member and the movable member, and a third fastening hole and a fourth fastening hole are provided on the other of the base member and the movable member. In addition, when the first fastener is inserted through the first fastening hole and the third fastening hole, and the second fastener is inserted through the second fastening hole and the fourth fastening hole, the rotational attitude of the movable member relative to the base member can be adjusted within a range in which the second fastener can move along the inside of the second fastening hole with the center position of the first fastening hole as the rotation center. By adjusting the rotational attitude of the movable member, the rotational attitude of the target tool relative to the wall surface can be adjusted, and the target tool can be properly mounted on various wall surfaces, and a mounting unit corresponding to various wall surfaces can be standardized. As a result, it is no longer necessary to share information about the wall surface among multiple vendors, which was necessary when designing and manufacturing conventional mounting brackets, or to design and manufacture dedicated mounting brackets for each type of wall surface, which is a cumbersome task, and this can significantly improve the work. Also, even if the wall surface is not constructed in the shape designed, it is possible to properly mount the target device by adjusting the rotational position of the target device by adjusting the rotational position of the movable member described above. Also, since the mounting unit is highly versatile, manufacturers can prepare and store this mounting unit, and it is also possible to mass-produce it or keep it in stock. [Brief description of the drawings]

[0029] [Figure 1] 1 is a diagram showing an example of a state in which an indicator light fixture is attached to an inner wall surface of a tunnel using a mounting unit according to an embodiment. FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] FIG. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] 11A to 11C are diagrams showing examples of a plurality of mounting patterns in which the rotational attitude and position of the movable member are changed according to the shape of the inner wall surface of the tunnel. [Figure 9] FIG. 5 is a view equivalent to FIG. 3 of a mounting unit according to a modified example. [Figure 10] 8 is a view equivalent to FIG. 7 of a mounting unit according to a modified example. [Figure 11] 1 is a diagram showing a state in which an indicator light device is attached to the inner wall surface of a tunnel using a conventional mounting bracket. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0030] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. In this embodiment, the present invention will be described as an attachment unit for attaching a display lamp device (a device to be attached in this invention) to the inner wall surface of a tunnel (a wall surface in this invention). In the following description, the "width direction of the road" may be called the "transverse direction of the road" and the "extension direction of the road (the direction in which the vehicle travels)" may be called the "longitudinal direction of the road". In this embodiment, the case where the first fastening hole 51a and the second fastening hole 51b are provided in the base member 5 (see FIG. 3) described later, and the third fastening hole 61a and the fourth fastening hole 61b are provided in the movable member 6 will be described as an example.

[0031] -Description of the installation status of the indicator light fixture- FIG. 1 is a diagram showing an example of a state in which an indicator light fixture 2 is attached to an inner wall surface 3 of a tunnel by a mounting unit 1 according to this embodiment. In FIG. 1, the left-right direction is the width direction of the road (the transverse direction of the road), and the direction perpendicular to the paper surface is the extension direction of the road (the longitudinal direction of the road). FIG. 1 also shows a case in which the indicator light fixture 2 is an emergency exit indicator light. However, the indicator light fixture 2 is not limited to this, and may be an emergency telephone indicator light, an emergency parking lane indicator light, or the like.

[0032] 1, the inner wall surface 3 of the tunnel is curved with a predetermined curvature, and the mounting unit 1 is fixed to this inner wall surface 3 with anchor bolts 4 and has the function of supporting an indicator light fixture 2. The configuration of this mounting unit 1 will be specifically described below.

[0033] -Description of mounting unit- FIG. 2 is a perspective view of the mounting unit 1. FIG. 3 is an exploded perspective view of the mounting unit 1. FIG. 4 is a front view of the mounting unit 1 (viewed from the center side in the width direction of the road). FIG. 5 is a rear view of the mounting unit 1 (viewed from the outside in the width direction of the road). FIG. 6 is a plan view of the mounting unit 1. FIG. 7 is a left side view of the mounting unit 1. In these figures, the X direction is the width direction of the road, and the Y direction is the extension direction of the road. In addition, these figures show a case where the movable member 6 is in a position where it has not rotated (not rotated toward the center side of the tunnel) relative to the base member 5 described later (a position where the movable member 6 has rotated most clockwise relative to the base member 5 as shown in FIG. 7). Hereinafter, this position of the movable member 6 will be called the stored position.

[0034] As shown in these figures, the mounting unit 1 is configured to include a base member 5 that is fixed to the inner wall surface 3 of the tunnel, and a movable member 6 that is integrally assembled to the base member 5 and supports the indicator light fixture 2. The base member 5 and the movable member 6 will be described below.

[0035] (Description of base material) The base member 5 is formed by bending a flat metal plate (eg, stainless steel), and includes a pair of left and right support plate portions 51, 51, a pair of left and right flange portions 52, 52, and a connecting plate portion 53.

[0036] Each of the support plate portions 51, 51 is made of a substantially rectangular plate material extending in a substantially vertical direction perpendicular to the inner wall surface 3 when the base member 5 is fixed to the inner wall surface 3 of the tunnel. The support plate portions 51, 51 face each other at a predetermined interval in the extension direction of the road.

[0037] A first fastening hole 51a is provided at the top of each of the support plates 51. The first fastening hole 51a opens to the upper edge of the support plate 51. In other words, the inner edge of the first fastening hole 51a is U-shaped, and as shown in Fig. 7, the first fastening hole 51a has a shape in which an arc-shaped arc hole portion 51c is continuous with an open groove portion 51d that extends upward from the upper end edge of the arc hole portion 51c and opens to the upper edge of the support plate 51.

[0038] Second fastening holes 51b, 51b are provided at the bottom of each support plate portion 51, 51. The second fastening hole 51b is an opening having an arc shape centered on the center position of the first fastening hole 51a. The center position of the first fastening hole 51a here is the center position of the arc of the arc hole portion 51c (see FIG. 7) of the first fastening hole 51a. The range in which the second fastening holes 51b are provided is a predetermined angle range from a position vertically below the first fastening hole 51a toward the opposite side to the flange portion 52 in the state shown in FIG. 7 (the state in the stored posture). In this embodiment, this angle range (angle α in FIG. 7) is set to, for example, about 30°. This value is not limited to this, and is determined according to the angle range assumed as the inclination angle of the inner wall surface 3 of the tunnel (assuming the inner wall surface 3 of the tunnel having the smallest inclination angle with respect to the horizontal direction).

[0039] Each flange portion 52,52 extends from the outer end of the support plate portion 51,51 (the end on the inner wall surface 3 of the tunnel in the width direction of the road) in a direction perpendicular to the support plate portion 51,51 and is made of an approximately rectangular plate material that is overlapped on the inner wall surface 3 of the tunnel.

[0040] An anchor bolt insertion hole 52a, 52a consisting of a long hole extending horizontally (in the extension direction of the road) is provided in the vertical center of each flange portion 52, 52. As shown in Fig. 1, an anchor bolt 4 is driven into the inner wall surface 3 of the tunnel, and each flange portion 52, 52 is fixed to the inner wall surface 3 of the tunnel by inserting the anchor bolt 4 into the anchor bolt insertion hole 52a and screwing a nut 41 into the anchor bolt 4. In this way, the base member 5 is fixed to the inner wall surface 3 of the tunnel. As mentioned above, since each anchor bolt insertion hole 52a, 52a is a long hole, it is possible to fix the base member 5 in an appropriate position on the inner wall surface 3 of the tunnel by inserting the anchor bolts 4, 4 into the anchor bolt insertion holes 52a, 52a while placing the base member 5 in the appropriate position, without requiring high precision in the driving position of the anchor bolts 4, 4 relative to the inner wall surface 3 of the tunnel (even if the driving position of the anchor bolts 4, 4 is shifted horizontally).

[0041] The connecting plate portion 53 is a flat member that connects the ends of the upper edges of the support plate portions 51, 51 on the inner wall surface 3 side of the tunnel. The length dimension of the connecting plate portion 53 (length dimension in the extension direction of the road) is set slightly larger than the width dimension (length dimension in the extension direction of the road) of the movable member 6 described below. As a result, the spacing dimension between the opposing support plate portions 51, 51 is set slightly larger than the width dimension of the movable member 6, and when the movable member 6 is assembled to the base member 5, the movable member 6 is inserted between the support plate portions 51, 51 of the base member 5 (see Figures 2 and 3).

[0042] (Description of movable parts) The movable member 6 is a U-shaped member when viewed from above, formed by bending a flat metal (e.g., stainless steel) plate, and has a pair of left and right side plate portions 61, 61, and a support plate portion 62 that connects the ends of each side plate portion 61, 61 (the ends opposite the inner wall surface 3 of the tunnel).

[0043] Each side plate portion 61, 61 is made of a substantially rectangular plate material that is superimposed on the inner surface of each support plate portion 51, 51 of the base member 5 when the movable member 6 is fitted inside the base member 5. The side plate portions 61, 61 face each other at a predetermined interval in the extension direction of the road.

[0044] As shown in Fig. 3, third fastening holes 61a, 61a corresponding to the first fastening holes 51a, 51a of the base member 5 are provided at the upper part of each side plate portion 61, 61. The third fastening holes 61a are formed as elongated holes whose longitudinal direction is along the extension direction of the upper end edge or the lower end edge of the side plate portion 61. In other words, the third fastening holes 61a are formed as elongated holes extending in the horizontal direction in the above-mentioned stored posture of the movable member 6. As shown in Fig. 2, when the movable member 6 is fitted inside the base member 5, the first fastening hole 51a of the base member 5 and the third fastening hole 61a of the movable member 6 are in communication with each other.

[0045] Further, the lower portion of each side plate portion 61, 61 is provided with a fourth fastening hole 61b, 61b corresponding to the second fastening hole 51b, 51b of the base member 5. This fourth fastening hole 61b is also formed as an elongated hole whose longitudinal direction is along the extension direction of the upper end edge or the lower end edge of the side plate portion 61. That is, this fourth fastening hole 61b is also formed as an elongated hole extending in the horizontal direction in the above-mentioned storage posture of the movable member 6. Therefore, the third fastening hole 61a and the fourth fastening hole 61b are formed as elongated holes parallel to each other. The distance between the third fastening hole 61a and the fourth fastening hole 61b is approximately equal to the distance between the first fastening hole 51a and the second fastening hole 51b. Therefore, as shown in FIG. 2, when the movable member 6 is fitted inside the base member 5 and the first fastening hole 51a and the third fastening hole 61a are in communication with each other, the second fastening hole 51b and the fourth fastening hole 61b are also in communication with each other. In this way, the base member 5 is provided with a first fastening hole 51a and a second fastening hole 51b as base side fastening holes, and the movable member 6 is provided with a third fastening hole 61a and a fourth fastening hole 61b as movable side fastening holes.

[0046] When the base member 5 and the movable member 6 are integrally assembled, a first bolt (first fastener) B1 is inserted through the first fastening hole 51a and the third fastening hole 61a (inserted from the inside of the movable member 6), and a first nut N1 is screwed into the first bolt B1. A second bolt (second fastener) B2 is inserted through the second fastening hole 51b and the fourth fastening hole 61b (inserted from the inside of the movable member 6), and a second nut N2 is screwed into the second bolt B2. In this state, in a stage prior to the fastening (tightening) operation of fastening (tightening) the first bolt B1 and the first nut N1 and the fastening operation of fastening the second bolt B2 and the second nut N2 (when fastening force is low), the rotational posture of the movable member 6 relative to the base member 5 is adjustable within a range in which the second bolt B2 can move along the inside of the second fastening hole 51b with the center position of the first fastening hole 51a (which approximately coincides with the center position of the first bolt B1) as the rotation center (see the arrow in FIG. 7). The adjustment operation of this rotational posture will be described later.

[0047] Fifth fastening holes 62a, 62a for fastening the indicator light device 2 are provided at two locations on the support plate portion 62. Each of the fifth fastening holes 62a, 62a is formed as an elongated hole extending in the vertical direction in the storage position of the movable member 6 described above. As a result, when supporting (supporting by fastening) the indicator light device 2 on the support plate portion 62 of the movable member 6, it is possible to change the insertion position of the bolt (not shown) extending from the indicator light device 2 with respect to the fifth fastening hole 62a, and this makes it possible to change the relative position of the indicator light device 2 with respect to the support plate portion 62 in the extension direction of the fifth fastening hole 62a (the longitudinal direction of the elongated hole) (when the movable member 6 is in the storage position, it is possible to adjust the fastening position of the indicator light device 2 in the vertical direction).

[0048] With the above configuration, the third fastening holes 61a, 61a, the fourth fastening holes 61b, 61b, and the fifth fastening holes 62a, 62a, which are long holes, extend in a direction perpendicular to the insertion direction of the first bolt B1 and the second bolt B2, respectively (when the movable member 6 is in the stored position, the third fastening holes 61a, 61a and the fourth fastening holes 61b, 61b extend horizontally, and the fifth fastening holes 62a, 62a extend vertically).

[0049] Incidentally, the dimensions of each part of the mounting unit 1 configured as described above are not particularly limited, but it is preferable that they are as small as possible while still providing sufficient mounting strength to the inner wall surface 3 of the tunnel and sufficient support strength for the indicator light device 2. As an example, in this embodiment, the width dimension (dimension along the extension direction of the road) of the base member 5 is about 250 mm, the height dimension is about 150 mm, and the depth dimension (dimension along the width direction of the road) is about 120 mm. The height dimension of the movable member 6 is about 200 mm. These dimensions are not limited to these values.

[0050] -Installation of indicator light fixtures- Next, the operation of mounting the indicator light fixture 2 on the inner wall surface 3 of a tunnel using the mounting unit 1 described above will be described.

[0051] In this installation work, the base member 5 is fixed to the inner wall surface 3 of the tunnel, and the movable member 6 is attached to the indicator light fixture 2, and then the movable member 6 is assembled to the base member 5.

[0052] In the work of fixing the base member 5 to the inner wall surface 3 of the tunnel, the anchor bolts 4, 4 driven into the inner wall surface 3 of the tunnel are inserted into the anchor bolt insertion holes 52a, 52a of the base member 5, respectively, and nuts 41, 41 are screwed into the anchor bolts 4, 4. In this way, the base member 5 is fixed to the inner wall surface 3 of the tunnel.

[0053] When attaching the movable member 6 to the indicator light fixture 2, the bolt protruding from the indicator light fixture 2 is inserted into the fifth fastening holes 62a, 62a formed in the support plate portion 62 of the movable member 6, and a nut is screwed onto the bolt. This attaches the movable member 6 to the indicator light fixture 2. At this time, the attachment position of the indicator light fixture 2 can be adjusted along the extension direction of the fifth fastening holes 62a, 62a.

[0054] 3, in the operation of assembling the movable member 6 to the base member 5, the first bolts B1, B1 are inserted into the third fastening holes 61a, 61a of the movable member 6 from inside the movable member 6, respectively, and the first nuts N1, N1 are screwed into the first bolts B1, B1. At this time, the screwing positions of the first nuts N1, N1 are set to positions where the side plate portion 61 of the movable member 6 is not pinched between the first bolt B1 and the first nut N1, that is, positions where a gap of a predetermined dimension or more (specifically, a thickness dimension or more of the support plate portion 51 of the base member 5) can be obtained between the first nut N1 and the side plate portion 61.

[0055] In this state, the movable member 6 is inserted into the inside of the base member 5 from the upper side thereof, and the first bolt B1 is fitted into the open portion of the first fastening hole 51a. In other words, the threaded portion of the first bolt B1 is fitted into the first fastening hole 51a so that the support plate portion 51 of the base member 5 is positioned between the first nut N1 and the side plate portion 61 of the movable member 6. This results in a configuration in which the first bolt B1 is inserted through the first fastening hole 51a and the third fastening hole 61a.

[0056] Thereafter, the second fastening holes 51b, 51b of the base member 5 and the fourth fastening holes 61b, 61b of the movable member 6 are brought into communication with each other, the second bolts B2, B2 are inserted from inside the movable member 6 through the second fastening holes 51b, 51b and the fourth fastening holes 61b, 61b, and the second nuts N2, N2 are screwed into the second bolts B2, B2, respectively. At this time, the screwing positions of the second nuts N2, N2 are set so that the side plate portion 61 of the movable member 6 and the support plate portion 51 of the base member 5 are not pinched between the second bolts B2 and the second nuts N2.

[0057] In this state, the relative position of the movable member 6 with respect to the base member 5 can be changed along the extending direction of the third fastening hole 61a and the fourth fastening hole 61b which are long holes, and the rotational attitude of the movable member 6 with respect to the base member 5 can be adjusted within a range in which the second bolt B2 can move along the inside of the second fastening hole 51b around the center position of the first fastening hole 51a (which approximately coincides with the center position of the first bolt B1). By adjusting the rotational attitude of the movable member 6 with respect to the base member 5, the rotational attitude of the indicator light device 2 with respect to the inner wall surface 3 of the tunnel can also be adjusted.

[0058] Then, the relative position of the movable member 6 with respect to the base member 5 is adjusted so that the indicator light device 2 is located outside the construction gauge range in the tunnel (outside the construction gauge range indicated by the two-dot chain line in FIG. 1) and in a position where the indicator light device 2 is not tilted, and the rotational position of the movable member 6 with respect to the base member 5 is adjusted, the first bolt B1 and the first nut N1 are fastened (tightened) and the second bolt B2 and the second nut N2 are fastened. At this time, a level carried by the worker is used to check that the indicator light device 2 is not tilted. As a result, the indicator light device 2 is attached to the inner wall surface 3 of the tunnel, located outside the construction gauge range in the tunnel and in a position where it is not tilted.

[0059] Furthermore, even after the indicator light fixture 2 has been attached to the inner wall surface 3 of the tunnel in this manner, it is possible to adjust the installation height position of the indicator light fixture 2 by changing the insertion position of the bolt of the indicator light fixture 2 relative to the fifth fastening holes 62a, 62a formed in the support plate portion 62 of the movable member 6.

[0060] -Example of installation of indicator light fixture- Next, a description will be given of a number of mounting patterns in which the rotational attitude and position of the movable member 6 are changed according to the shape of the inner wall surface 3 of the tunnel. Fig. 8 is a diagram showing examples of the multiple mounting patterns. In Fig. 8, the indicator light device 2 is shown by a virtual line.

[0061] 8(a) shows an example in which the indicator light device 2 is positioned farthest from the inner wall surface 3 of the tunnel when the inclination angle of the inner wall surface 3 of the tunnel (if the inner wall surface 3 is a curved surface, the inclination angle of the tangent to the inner wall surface 3 at the attachment location of the mounting unit 1) is 60°. That is, the position of the first bolt B1 is the position closest to the inner wall surface 3 in the third fastening hole 61a, the position of the second bolt B2 is the position closest to the inner wall surface 3 in the fourth fastening hole 61b, and the movable member 6 is rotated 30° from the rotation position in the stored posture (rotated counterclockwise in FIG. 8) to set the indicator light device 2 in a posture that is not tilted.

[0062] 8(b) shows an example in which the indicator light device 2 is positioned farthest from the tunnel inner wall surface 3 when the inclination angle of the tunnel inner wall surface 3 is 75°. That is, the position of the first bolt B1 is the position closest to the inner wall surface 3 in the third fastening hole 61a, the position of the second bolt B2 is the position closest to the inner wall surface 3 in the fourth fastening hole 61b, and the movable member 6 is rotated 15° from the rotated position in the stored posture to set the indicator light device 2 to a posture where it is not tilted.

[0063] 8(c) shows an example in which the indicator light device 2 is positioned closest to the tunnel inner wall surface 3 when the inclination angle of the tunnel inner wall surface 3 is 60°. In other words, the position of the first bolt B1 is the position of the third fastening hole 61a that is the farthest from the inner wall surface 3, the position of the second bolt B2 is the position of the fourth fastening hole 61b that is the farthest from the inner wall surface 3, and the movable member 6 is rotated 30° from the rotation position in the stored posture to set the indicator light device 2 to a posture where it is not tilted.

[0064] 8(d) shows an example in which the indicator light device 2 is positioned closest to the tunnel inner wall surface 3 when the inclination angle of the tunnel inner wall surface 3 is 75°. In other words, the position of the first bolt B1 is the position of the third fastening hole 61a that is the furthest from the inner wall surface 3, the position of the second bolt B2 is the position of the fourth fastening hole 61b that is the furthest from the inner wall surface 3, and the movable member 6 is rotated 15° from the rotated position in the stored posture to set the indicator light device 2 in a posture where it is not tilted.

[0065] In this way, with the mounting unit 1 of this embodiment, it is possible to properly mount the indicator light device 2 by changing the rotational posture and position of the movable member 6 according to the shape of the inner wall surface 3 of various tunnels.

[0066] -Effects of the embodiment- As described above, in this embodiment, in the stage prior to the fastening (tightening) of the bolts B1, B2 and nuts N1, N2, the rotational attitude of the movable member 6 relative to the base member 5 can be adjusted within a range in which the second bolt B2 can move along the inside of the second fastening hole (arc-shaped hole) 51b with the center position of the first fastening hole 51a as the rotational center. In other words, by adjusting the rotational attitude of the movable member 6, the rotational attitude of the indicator light device 2 relative to the inner wall surface 3 of the tunnel can be changed (adjusted). Therefore, according to the mounting unit 1 of this embodiment, it is not necessary to design and prepare mounting brackets individually according to the type of inner wall surface of the tunnel (for example, the inclination angle of the wall surface) as in the conventional technology, and it is possible to properly mount the indicator light device 2 on the inner wall surface 3 of various tunnels with one type of mounting unit 1, and it is possible to standardize the mounting unit 1 corresponding to the inner wall surface 3 of various tunnels. As a result, it is no longer necessary to share information about the tunnel's inner wall surface among multiple contractors, which was previously necessary when designing and manufacturing mounting brackets, or to design and manufacture dedicated mounting brackets for each type of tunnel inner wall surface, which is a cumbersome task, and this can significantly improve work efficiency. Also, even if the tunnel's inner wall surface 3 is not constructed in the shape designed, it is possible to properly mount the indicator light device 2 by adjusting the rotational position of the movable member 6 to adjust the rotational position of the indicator light device 2.

[0067] In this embodiment, the third fastening hole 61a and the fourth fastening hole 61b are configured as elongated holes that extend in a direction perpendicular to the insertion direction of the first bolt B1 and the second bolt B2 and are parallel to each other, so that it is possible to change the relative position of the movable member 6 with respect to the base member 5 in the extension direction of the third fastening hole 61a and the fourth fastening hole 61b (the longitudinal direction of the elongated holes). In other words, the relative position of the indicator light device 2 with respect to the inner wall surface 3 of the tunnel (the relative position in the direction along the longitudinal direction of the elongated holes: the distance from the inner wall surface 3 of the tunnel) can be adjusted. Therefore, the position of the indicator light fixture 2 relative to the inner wall surface 3 of the tunnel can be adjusted, and the indicator light fixture 2 can be adjusted to be located outside the building limit range (by adjusting the position of the indicator light fixture 2 closer to the inner wall surface 3 of the tunnel to be located outside the building limit range), or the indicator light fixture 2 can be adjusted to a position where it does not interfere with the inner wall surface 3 of the tunnel (by adjusting the position of the indicator light fixture 2 away from the inner wall surface 3 to be a position where it does not interfere with the inner wall surface 3 of the tunnel).

[0068] In this embodiment, the fifth fastening holes 62a, 62a provided in the support plate portion 62 of the movable member 6 are configured as elongated holes extending in a direction perpendicular to the insertion direction of the first bolt B1 and the second bolt B2, respectively, so that the position of the indicator light fixture 2 (the position supported by the movable member 6) can be adjusted in the vertical direction. This makes it possible to adjust the mounting height position of the indicator light fixture 2, and to adjust the indicator light fixture 2 so that it is positioned outside the building gauge range (by increasing the mounting height position of the indicator light fixture 2, the indicator light fixture 2 can be adjusted so that it is positioned outside the building gauge range), or to adjust the indicator light fixture 2 to a position where it does not interfere with the inner wall surface 3 of the tunnel (by lowering the mounting height position of the indicator light fixture 2, the upper end of the indicator light fixture 2 can be adjusted to a position where it does not interfere with the inner wall surface 3 of the tunnel).

[0069] Furthermore, since the mounting unit 1 according to this embodiment is highly versatile, manufacturers can prepare and store the mounting unit 1, and it is also possible to mass-produce it or keep it in stock.

[0070] -Variations- Next, a modified example will be described. In this modified example, the configurations of the first fastening hole, the third fastening hole, and the fourth fastening hole are different from those of the previously described embodiment. Also, the fastening structure using each fastening hole is different from that of the previously described embodiment. The other configurations are the same as those of the previously described embodiment. Therefore, here, the configurations of the first fastening hole, the third fastening hole, and the fourth fastening hole, and the fastening structure using each fastening hole will be mainly described.

[0071] Fig. 9 is a view (exploded perspective view) of the mounting unit 1 according to this modified example, which corresponds to Fig. 3. Also, Fig. 10 is a view (left side view) of the mounting unit 1 according to this modified example, which corresponds to Fig. 7.

[0072] As shown in Figures 9 and 10, the first fastening hole 51e provided in the upper part of each support plate portion 51, 51 of the base member 5 is configured as a round hole having an inner diameter dimension that approximately matches (or is slightly larger than) the outer diameter dimension of the threaded portion of the first bolt (first fastener) B1.

[0073] The third fastening holes provided in the upper part of each side plate portion 61, 61 of the movable member 6 are two round holes, one of which is selected when the movable member 6 is assembled to the base member 5, and include an inner third fastening hole 61c provided in a position closer to the support plate portion 62 and an outer third fastening hole 61d provided in a position opposite the support plate portion 62. The inner third fastening hole 61c and the outer third fastening hole 61d are respectively formed at positions with a predetermined interval in the horizontal direction in the storage position of the movable member 6 described above. The inner diameter dimension of the inner third fastening hole 61c and the outer third fastening hole 61d is approximately equal to the outer diameter dimension of the threaded portion of the first bolt B1. The inner surface of the inner third fastening hole 61c and the outer third fastening hole 61d is formed with a female thread into which the first bolt B1 can be screwed.

[0074] The fourth fastening holes provided in the lower part of each side plate portion 61, 61 of the movable member 6 are also composed of two round holes, one of which is selected when the movable member 6 is assembled to the base member 5, and include an inner fourth fastening hole 61e provided in a position closer to the support plate portion 62 and an outer fourth fastening hole 61f provided in a position opposite the support plate portion 62. The inner fourth fastening hole 61e and the outer fourth fastening hole 61f are respectively formed at positions with a predetermined interval in the horizontal direction in the storage position of the movable member 6 described above. This interval is equal to the interval between the inner third fastening hole 61c and the outer third fastening hole 61d described above. The inner diameter dimension of the inner fourth fastening hole 61e and the outer fourth fastening hole 61f is approximately equal to the outer diameter dimension of the threaded portion of the second bolt (second fastener) B2. The inner surface of the inner fourth fastening hole 61e and the outer fourth fastening hole 61f is formed with a female thread into which the second bolt B2 can be screwed.

[0075] Next, a description will be given of an operation for assembling the movable member 6 to the base member 5 in this modified example. Here, a description will be given of a case in which the inner third fastening hole 61c is used as the third fastening hole and the inner fourth fastening hole 61e is used as the fourth fastening hole.

[0076] As shown in Figures 9 and 10, the movable member 6 is inserted into the base member 5, and the inner third fastening hole 61c is aligned with the first fastening hole 51e, and the inner fourth fastening hole 61e is aligned with the second fastening hole 51b. In this state, the first bolt B1 is inserted from the outside of the base member 5 through the first fastening hole 51e and the inner third fastening hole 61c, and screwed into the female thread formed on the inner surface of the inner third fastening hole 61c. Similarly, the second bolt B2 is inserted from the outside of the base member 5 through the second fastening hole 51b and the inner fourth fastening hole 61e, and screwed into the female thread formed on the inner surface of the inner fourth fastening hole 61e. In this case, the screwing position of each bolt B1, B2 is a position where the head of each bolt B1, B2 does not press against the outer surface of each support plate portion 51, 51 (a position where the support plate portion 51 of the base member 5 and the side plate portion 61 of the movable member 6 do not come into contact with high pressure).

[0077] In this state, the rotational attitude of the movable member 6 relative to the base member 5 can be adjusted within a range in which the second bolt B2 can move along the inside of the second fastening hole 51b, with the center position of the first fastening hole 51e (which coincides with the center position of the first bolt B1) as the rotation center. By adjusting the rotational attitude of the movable member 6 relative to the base member 5, the rotational attitude of the indicator light device 2 relative to the inner wall surface 3 of the tunnel can also be adjusted.

[0078] Then, in a state where the rotational attitude of the movable member 6 relative to the base member 5 is adjusted so that the indicator light device 2 is in a position where it will not tilt, further fastening (tightening) work is performed on the bolts B1, B2. As a result, the movable member 6 is attached to the base member 5, and in this state, the indicator light device 2 is in a position where it will not tilt and is attached to the inner wall surface 3 of the tunnel.

[0079] In the above description, the case where the inner third fastening hole 61c is used as the third fastening hole and the inner fourth fastening hole 61e is used as the fourth fastening hole has been described. In this case, the indicator light device 2 is closer to the inner wall surface 3 of the tunnel than when the outer third fastening hole 61d is used as the third fastening hole and the outer fourth fastening hole 61f is used as the fourth fastening hole.

[0080] In contrast, when the outer third fastening hole 61d is used as the third fastening hole and the outer fourth fastening hole 61f is used as the fourth fastening hole, the indicator light fixture 2 will be further away from the inner wall surface 3 of the tunnel than when the inner third fastening hole 61c is used as the third fastening hole and the inner fourth fastening hole 61e is used as the fourth fastening hole.

[0081] By selecting such a third fastening hole (the inner third fastening hole 61c or the outer third fastening hole 61d) and a fourth fastening hole (the inner fourth fastening hole 61e or the outer fourth fastening hole 61f), the position of the indicator light fixture 2 with respect to the inner wall surface 3 of the tunnel can be adjusted, as in the case of the above-mentioned embodiment. In other words, by selecting the third fastening hole and the fourth fastening hole, the indicator light fixture 2 can be adjusted to be located outside the construction gauge range (the position of the indicator light fixture 2 can be adjusted to be located outside the construction gauge range by moving it closer to the inner wall surface 3 of the tunnel), or the indicator light fixture 2 can be adjusted to a position where it does not interfere with the inner wall surface 3 of the tunnel (the position of the indicator light fixture 2 can be adjusted to a position where it does not interfere with the inner wall surface 3 of the tunnel by moving it away from the inner wall surface 3 of the tunnel).

[0082] In addition, in this modified example, the configuration has two third fastening holes (inner third fastening hole 61c and outer third fastening hole 61d) and two fourth fastening holes (inner fourth fastening hole 61e and outer fourth fastening hole 61f), but it may also be configured to have three or more.

[0083] -Other embodiments- The present invention is not limited to the above-described embodiment and modified examples, and all modifications and applications encompassed within the scope of the claims and equivalents thereto are possible.

[0084] For example, in the above embodiment and modified example, the present invention has been described as being applied to the mounting unit 1 for mounting the indicator light fixture 2 on the inner wall surface 3 of a tunnel. The present invention is not limited to this, and can be similarly applied to cases where other fixtures (target fixtures) are mounted on the inner wall surface 3 of a tunnel, or where the target fixtures are mounted on wall surfaces other than tunnels.

[0085] In the above embodiment and modified example, the first fastening hole 51a and the second fastening hole 51b are provided in the base member 5, and the third fastening hole 61a (the inner third fastening hole 61c and the outer third fastening hole 61d) and the fourth fastening hole 61b (the inner fourth fastening hole 61e and the outer fourth fastening hole 61f) are provided in the movable member 6. However, the present invention is not limited to this, and the first fastening hole and the second fastening hole may be provided in the movable member 6, and the third fastening hole and the fourth fastening hole may be provided in the base member 5.

[0086] In addition, in the above embodiment and modified example, an example has been described in which the mounting unit 1 has a function for adjusting the rotational attitude of the indicator light fixture 2, a function for adjusting the position of the indicator light fixture 2 in the horizontal direction, and a function for adjusting the position of the indicator light fixture 2 in the vertical direction. The present invention is not limited to this, and a mounting unit 1 having one or two of these functions also falls within the scope of the technical idea.

[0087] In the above embodiment and modified example, the base member 5 and the movable member 6 that constitute the mounting unit 1 are made of metal. The materials that constitute the base member 5 and the movable member 6 are not limited to this, and may be made of resin, for example.

[0088] In the above embodiment, the bolts B1 and B2 are inserted from the inside of the movable member 6. The present invention is not limited to this, and the bolts may be inserted from the outside of the base member 5. In the above modified example, the bolts B1 and B2 are inserted from the outside of the base member 5. The present invention is not limited to this, and the bolts may be inserted from the inside of the movable member 6. [Industrial Applicability]

[0089] The present invention is applicable to a mounting unit capable of properly mounting a mounting target device to various wall surfaces. [Explanation of symbols]

[0090] 1 Mounting unit 2. Indicator light fixture (applicable fixture) 3. Inner wall surface of the tunnel (wall surface) 5 Base material 51a 1st fastening hole 51b 2nd fastening hole 6 Movable parts 61a 3rd fastening hole 61b 4th fastening hole 62 Support plate part 62a 5th fastening hole B1 First bolt (first fastener) B2 Second bolt (second fastener)

Claims

1. A mounting unit for mounting a target fixture on a wall, The device comprises a base member fixed to the wall surface, and a movable member integrally assembled to the base member by a fastener and supporting the attachment target device, One of the base member and the movable member is provided with a first fastening hole and a second fastening hole having an arc shape centered on a central position of the first fastening hole, the other of the base member and the movable member is provided with a third fastening hole corresponding to the first fastening hole and a fourth fastening hole corresponding to the second fastening hole, An attachment unit characterized in that, when a first fastener is inserted through the first fastening hole and the third fastening hole, and a second fastener is inserted through the second fastening hole and the fourth fastening hole, the rotational posture of the movable member relative to the base member can be adjusted within a range in which the second fastener can move along the inside of the second fastening hole, with the center position of the first fastening hole as the rotation center.

2. The mounting unit according to claim 1, An attachment unit characterized in that the third fastening hole and the fourth fastening hole are each configured as long holes extending in a direction perpendicular to the insertion direction of the first fastener and the second fastener, respectively, and parallel to each other.

3. The mounting unit according to claim 1, An attachment unit characterized in that the third fastening hole and the fourth fastening hole are each composed of a plurality of round holes arranged at a predetermined interval in a direction perpendicular to the insertion direction of the first fastener and the second fastener, respectively.

4. The mounting unit according to claim 1, 2 or 3, The movable member is provided with a support plate portion that supports the mounting target instrument, and the support plate portion is provided with a fifth fastening hole for fastening the mounting target instrument, and the fifth fastening hole is configured as a long hole extending in a direction perpendicular to the insertion direction of each of the first fastening tool and the second fastening tool.

5. The mounting unit according to claim 1, 2 or 3, A mounting unit, characterized in that the first fastening hole is open at an outer edge of one of the base member and the movable member in which the first fastening hole is provided.

6. The mounting unit according to claim 1, 2 or 3, The mounting unit, wherein the wall surface is an inner wall surface of a tunnel.

7. A mounting unit for mounting a target fixture on a wall, The device comprises a base member fixed to the wall surface, and a movable member integrally assembled to the base member by a fastener and supporting the attachment target device, One of the base member and the movable member is provided with a first fastening hole and a second fastening hole, the other of the base member and the movable member is provided with a third fastening hole corresponding to the first fastening hole and a fourth fastening hole corresponding to the second fastening hole, a first fastener is inserted through the first fastening hole and the third fastening hole, and a second fastener is inserted through the second fastening hole and the fourth fastening hole; An attachment unit characterized in that the third fastening hole and the fourth fastening hole are long holes extending in a direction perpendicular to the insertion direction of the first fastener and the second fastener, respectively, and parallel to each other.

8. A mounting unit for mounting a target fixture on a wall, The device comprises a base member fixed to the wall surface, and a movable member integrally assembled to the base member by a fastener and supporting the attachment target device, The base member is provided with a base side fastening hole, The movable member is provided with a movable side fastening hole corresponding to the base side fastening hole, A fastener is inserted through the base side fastening hole and the movable side fastening hole, An attachment unit characterized in that the movable member has a support plate portion that supports the attachment target instrument, and the support plate portion is provided with a fifth fastening hole for fastening the attachment target instrument, the fifth fastening hole being configured as a long hole extending in a direction perpendicular to the insertion direction of the fastener.

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