JP2016006269A - Groove cover device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a groove cover device which prevents that a groove space which is covered with a groove covering body arranged at one of two skeletons which adjoin each other via the groove space from above is exposed to the outside by an earthquake.SOLUTION: A groove cover device 10 includes: a telescopic structure 21 which has energization means 32, is constituted so as to be telescopic in a groove width direction X, connected a skeleton 13 at one end in the groove width direction X, and held by an energization force of the energization means 32 in an elongated state at a normal time; and a cover body 22 which has a plurality of plate-shaped members 91, and is rotatably connected with a pair of the adjacent plate-shaped members 91. The telescopic structure 21 has a support face whose dimension in the groove width direction X is increased and decreased accompanied by the elongation/contraction of a pantograph structure part 31 at its upper part, has a salient part 33 which is salient to a skeleton 12 side rather than the support face at its lower part, and in the cover body 22, the plate-shaped member 91 arranged at the skeleton 13 side nearest thereto is connected to the skeleton 13 side, and horizontally supported by the support face from below.

Description

  According to the present invention, the groove space is installed on the other housing side below the groove covering body that protrudes from one housing of the two housings adjacent to each other through the groove space and covers the groove space. It relates to the groove cover apparatus which covers

  FIG. 14 is a cross-sectional view showing the configuration of the groove covering 3 configured to cover the groove space 2 provided around the building 1 from above. FIG. 15 is a vertical cross-sectional view showing a simplified relationship between the building 1 and the peripheral wall portion 5 of the adjacent foundation structure 4 via the groove space 2 provided around the building 1. This groove covering 3 is shown in Patent Document 1, for example.

  As shown in FIG. 15, the foundation structure 4 is provided below the ground surface portion 6, and the support surface 7 facing upward at the bottom of the foundation structure 4 is attached to the building 1 by a seismic isolation device 8 including an isolator or the like. The base structure 4, the seismic isolation device 8, and the building 1 are included to constitute a seismic isolation building.

  Between the building 1 and the surrounding surface portion 6, and more specifically, between the outer wall of the building 1 and the peripheral wall portion 5 of the foundation structure 4, the building 1 becomes a ground and foundation structure 4 due to an earthquake. On the other hand, a groove space 2 having a width W over the entire circumference in the circumferential direction is provided in order to prevent a collision caused by displacement in the direction perpendicular to the paper surface of FIG. 15 and the horizontal direction of FIG.

  The groove space 2 prevents the pedestrian and the vehicle from dropping into the groove space 2 and prevents the rainwater and dust from entering the groove space 2 by the groove covering body 3. It is blocked. The groove covering body 3 has a base end portion connected to the outer wall of the building 1 so as to be angularly displaceable, and a free end portion protruding above the peripheral wall portion 5 onto the ground surface portion 6.

JP 2002-173989 A

  However, in the groove covering 3 shown in FIG. 14, if the width W of the groove space 2 becomes wider than the width in the left-right direction of the groove covering 3 due to an earthquake, the groove space 2 is exposed to the outside, and the groove covering There is a problem that a pedestrian may fall into the groove space 2 through the gap between the peripheral wall 3 and the peripheral wall 5. Although it is possible to increase the lateral width W of the groove covering 3 for this problem, in this case, the site necessary for the installation of the groove covering 3 spreads and cannot be installed. Can also occur.

  It is an object of the present invention to provide an earthquake when two housings are adjacent to each other through a groove space, and the groove space is covered from above by a groove covering body provided so as to project from one housing to the other housing side. It is an object of the present invention to provide a groove cover device that prevents the groove space from being exposed to the outside due to an increase in the width of the groove space.

The present invention is provided in one casing of two casings that are adjacent to each other via a groove space in the horizontal width direction, and projects from the one casing to the other casing side, below the groove covering that covers the groove space. A groove cover device disposed and installed on the other housing,
An expansion / contraction structure that includes an urging unit, is configured to be expandable / contractible in the width direction, and has one end portion in the width direction coupled to the other casing, and is normally held in an expanded state by the urging force of the urging unit. The body has a horizontal dimension in which the dimension in the width direction decreases with contraction from the stretched state, and the dimension in the width direction increases with extension from the contracted state to the stretched state. Provided in the lower end of the other end portion in the width direction so as to protrude toward the one housing side from the support surface in the width direction, and separated from the one housing body in the extended state. A telescopic structure having a protrusion to be disposed;
A plurality of long plate-like members are provided, and the plurality of plate-like members are juxtaposed along the width direction so that the longitudinal direction thereof coincides with the groove extending direction perpendicular to the width direction and the vertical direction. And a pair of plate-like members adjacent to each other in the width direction are connected to each other so as to be rotatable around an axis extending in the groove extending direction, and the other casing is the most in the width direction. A groove cover device comprising: a cover member that is connected to the other housing side and is horizontally supported from below by the support surface.

  Further, the invention is characterized in that the stretchable structure is configured to move the protruding portion along the width direction as the stretchable structure is stretched.

  In the invention, it is preferable that the projecting portion is a right columnar body or a right cylindrical body whose central axis extends along the vertical direction.

  Further, according to the present invention, in the telescopic structure, each end on the other housing side is disposed close to each other in the groove extending direction and is rotatable about an axis extending in the vertical direction. A pair of first plate-like bodies connected to the respective sides, and each end on the other housing side so as to be rotatable about an axis extending in the vertical direction. A pair of second plate-like bodies respectively connected to the respective end portions on one housing side, and each end portion on the one housing side of the pair of second plate-like bodies are mutually connected in the groove extending direction. It has a pantograph structure part comprised by the connection piece respectively connected so that it can rotate around the axis line extended in the perpendicular direction in the state arrange | positioned adjacently.

  Further, the present invention is characterized in that the urging means is arranged between the connecting portions of the first plate-like body and the second plate-like body.

  The present invention is further characterized by further comprising an extension regulating means for preventing the angle formed by the opposed inner surfaces of the pair of first plate-like bodies from being less than a predetermined first angle.

  According to the present invention, the extension regulating means is provided on one first plate-like body, and an angle formed by opposing inner surfaces of the pair of first plate-like bodies is the predetermined first angle. The first restricting portion contacting the inner surface of the other first plate-like body, and the one second plate-like body connected to the other first plate-like body, A second restricting portion that comes into contact with the inner surface of the other second plate-like member when the angle formed between the opposing inner surfaces of the pair of first plate-like members becomes the first predetermined angle; It is characterized by having.

  Further, in the present invention, the extension regulating means is provided in the other casing, and when the angle formed by the opposed inner surfaces of the pair of first plate-like bodies becomes the predetermined first angle, In the pair of first plate-like bodies, a third regulating portion that contacts each side surface facing the other housing, and an inner surface facing the pair of first plate-like bodies provided in the connecting piece When the angle formed by the first predetermined angle is provided, the pair of second plate-like bodies includes a fourth restricting portion that comes into contact with each side surface facing the connecting piece. .

  The present invention is further characterized by further comprising a shrinkage restricting means for preventing an angle formed between opposing inner surfaces of the pair of first plate-like bodies from becoming larger than a predetermined second angle.

  Further, in the present invention, the contraction restricting means is provided in the other casing, and when the angle formed by the opposed inner surfaces of the pair of first plate-like bodies becomes the predetermined second angle, A fifth regulating portion that contacts the outer surface opposite to the inner surface of one first plate-like body, and the inner surfaces facing each other in the pair of first plate-like bodies, provided on the other casing When the angle formed by the second predetermined angle is equal to the predetermined second angle, a sixth restricting portion that contacts the outer surface opposite to the inner surface of the other first plate-like body is provided. .

  According to the present invention, when two housings are adjacent to each other through a groove space, and the groove space is covered from above by a groove covering portion provided so as to project from one housing to the other housing side, an earthquake occurs. For example, it is possible to reliably prevent the groove space from being exposed to the outside by widening the width of the groove space.

It is a side view which shows the structure of the groove cover apparatus 10 which concerns on the 1st Embodiment of this invention. It is the top view which looked at the groove cover apparatus 10 shown in FIG. 1 from the upper side. It is sectional drawing seen from the cut surface line III-III in FIG. It is a perspective view which shows the structure of the expansion-contraction structure 21 in the groove cover apparatus 10 shown in FIG. 3 is a perspective view showing a configuration of a connecting piece 42 in the pantograph structure part 31. FIG. FIG. 4 is an exploded perspective view showing a part of the pantograph structure part 31 in an exploded manner. It is a perspective view which shows the structure of the 1st control part 34a. It is sectional drawing which expands and shows a part of cover body 22 in the groove | channel cover apparatus 10 shown in FIG. It is a side view which shows the groove | channel cover apparatus 10 when the housings 12 and 13 are relatively displaced in the direction which leaves | separates mutually. It is a side view which shows the groove cover apparatus 10 when the housings 12 and 13 are relatively displaced in the direction which adjoins mutually. It is the top view which looked at the groove cover apparatus 10 shown in FIG. 10 from the upper side. It is the top view which looked at 10A of groove cover apparatuses concerning the 2nd Embodiment of this invention from the upper side. It is the top view which looked at 10 A of groove cover apparatuses when the housings 12 and 13 are relatively displaced in the direction which adjoins mutually. It is sectional drawing which shows the structure of the groove | channel covering body 3 comprised so that the groove space 2 provided in the circumference | surroundings of the building 1 might be coat | covered from upper direction. 2 is a vertical cross-sectional view showing a simplified relationship between a building 1 and a peripheral wall portion 5 of a foundation structure 4 adjacent to each other via a groove space 2 provided around the building 1. FIG.

  FIG. 1 is a side view showing the configuration of the groove cover device 10 according to the first embodiment of the present invention, and shows a normal installation state in which an earthquake or the like does not occur. The groove cover device 10 according to the present embodiment is a device that is installed and used in the groove space 11 at a place where the two casings 12 and 13 are adjacent to each other via the groove space 11. One of the casings 12 is a lower Z2 of the groove covering body 14 provided so as to protrude toward the other casing 13 so as to cover the groove space 11 from the upper side Z1. It is an apparatus that is installed and used on the other housing 13 side that is the opposite side to the housing 12.

  As one housing 12 in which the groove covering 14 is installed, for example, a building supported by a seismic isolation device (not shown) is assumed. The seismic isolation device is a device having a damper device and a plurality of isolators interposed between the lower end surface of the building and the installation surface where the building is installed, and each isolator absorbs seismic force, The building is mechanically insulated from the ground on which the building is installed and the foundation structure, so that the seismic force transmitted to the building is attenuated, and the damper device can absorb the displacement of the building.

  For this reason, between the building and the surrounding ground surface, more specifically, between the outer wall of the building and the peripheral wall of the foundation structure formed on the ground surface side, the building is moved in the horizontal direction by an earthquake. In order to prevent the building and the peripheral wall of the foundation structure from interfering with each other when displaced relatively, a groove space 11 having a predetermined width is formed over the entire circumference in the circumferential direction of the building. In this case, the peripheral wall portion of the foundation structure corresponds to the other housing 13.

  The groove covering body 14 is a structure provided on the building side, that is, one housing 12 side in order to prevent a pedestrian and a vehicle from dropping into the groove space 11, and in the example shown in FIG. The assembly panel body 15 formed in a shape and the first casing 12 are installed on one casing 12 and the end 15a on the one casing 12 side of the assembly panel body 15 is supported so as to be rotatable about an axis extending in the groove extending direction Y. The assembly panel body 15 includes a first edge member 16 and a second edge member 17 that is installed on the other housing 13 and on which the end 15b of the assembly panel body 15 on the other housing 13 side is movably mounted. The first edge member 16 and the second edge member 17 are horizontally extended.

  In the groove cover device 10 according to the present embodiment, a gap d (see FIG. 9) is generated between the end 15b on the other housing 13 side of the assembly panel body 15 and the second edge member 17 due to the earthquake. In this case, in order to prevent a pedestrian or the like from dropping into the groove space 11 from the gap d, the space on the other housing 13 side in the groove space 11 is covered from the upper side Z1.

  Hereinafter, the configuration of the groove cover device 10 according to the present embodiment will be described in detail with reference to the drawings. In the description of the present embodiment, the direction in which the two casings 12 and 13 are separated from each other in the horizontal direction is referred to as “groove width direction X”, and the horizontal direction perpendicular to the groove width direction X is “groove extension”. The direction perpendicular to the groove width direction X and the groove extending direction Y is “vertical direction Z”, and one of the vertical directions Z is “upper Z1” and the other is “lower Z2”.

  As shown in FIG. 1, the groove cover device 10 includes a stretchable structure 21 configured to be stretchable in the groove width direction X and a cover body 22 supported by the stretchable structure 21 from below Z2.

  2 is a plan view of the groove cover device 10 shown in FIG. 1 as viewed from above, and FIG. 3 is a cross-sectional view of the groove cover device 10 as viewed from the section line III-III in FIG. FIG. 4 is a perspective view showing a configuration of the stretchable structure 21 in the groove cover device 10 shown in FIG. In FIG. 2, the cover body 22 is indicated by a virtual line.

  In the present embodiment, the stretchable structure 21 is configured to be stretchable in the groove width direction X, and one end in the groove width direction X is connected to the housing 13 and the pantograph structure 31 will be described later. A biasing means 32 capable of imparting a biasing force to the pantograph structure 31 so as to be stretched from a predetermined stretched state, and a lower part at the other end of the pantograph structure 31 opposite to the one end, The protrusion 33 provided apart from the housing 12 and the expansion restricting means 34 for preventing the pantograph structure 31 from extending from the predetermined extended state are configured.

  The pantograph structure 31 includes four plate-like bodies 41 a to 41 d that are formed in the same shape, a connecting piece 42, and a plurality of hinges 43. Each of the plate-like bodies 41a to 41d is a metal member that is generally formed in a rectangular parallelepiped shape. In this embodiment, a plurality of plate-like pieces made of, for example, SUS are joined to each other, as shown in FIG. It is formed so as to be hollow.

  The four plate-like bodies 41a to 41d are arranged so that the thickness direction thereof coincides with the horizontal direction and the upper end surface 51 thereof is horizontal, and when viewed from above, as shown in FIG. The end faces 51 are generally rhombuses, and the upper end faces 51 are flush with each other, and further, one diagonal line of the rhombuses is arranged to extend in parallel with the groove width direction X.

  At this time, as shown in FIG. 2, the four plate-like bodies 41a to 41d have mutually adjacent end portions 52, 53; 52, 52; 53, 53 that interfere with each other by a rotation operation described later. In order to prevent this, the groove width direction X or the groove extending direction Y is arranged at a suitable distance.

  And each edge part 52 by the side of the housing 13 in a pair of plate-shaped body 41a, 41b arrange | positioned at the housing 13 side among the four plate-like bodies 41a-41d arrange | positioned in this way is by the hinge 43. Each is coupled to the housing 13 so as to be rotatable about an axis J1 extending in the vertical direction Z.

  Specifically, one hinge piece 43a constituting the hinge 43 is fixed to the housing 13 side by fastening or welding, and the other hinge piece 43b is fastened to each outer surface 54 of the plate-like bodies 41a and 41b. Each of the end portions 52 of the plate-like bodies 41a and 41b can be rotated around the axis J1 by being fixed by welding and connecting these two hinge pieces 43a and 43b via the hinge shaft 43c. Each is connected to the housing 13.

  Here, in each of the plate-like bodies 41 a to 41 d, of the main surfaces in the thickness direction, the main surface arranged outside the pantograph structure portion 31 is the outer surface 54, and the other main surface is the inner surface 55. .

  Further, each end portion 53 on the housing 12 side of the pair of plate-like bodies 41 a and 41 b is provided with each end portion 52 on the housing 13 side of the pair of plate-like bodies 41 c and 41 d arranged on the housing 12 side. , Respectively, so as to be rotatable about an axis J1 extending in the vertical direction Z.

  Specifically, one hinge piece 43a constituting the hinge 43 is fixed to each inner surface 55 of the plate-like bodies 41a and 41b by fastening or welding, and the other hinge piece 43b is fixed to the plate-like bodies 41c and 41d. Are fixed to each inner surface 55 by fastening or welding, and these two hinge pieces 43a and 43b are connected to each other via a hinge shaft 43c. It is connected to each end 53 of the plate-like bodies 41a and 41b so as to be rotatable around J1.

  Further, each end portion 53 on the side of the housing 12 in the pair of plate-like bodies 41 c and 41 d is connected to the connecting piece 42 by the hinge 43 so as to be rotatable around the axis J1 extending in the vertical direction Z.

  FIG. 5 is a perspective view showing the configuration of the connecting piece 42 in the pantograph structure portion 31. In the present embodiment, the connecting piece 42 is formed by bending a metal plate-like body such as SUS. Specifically, the connecting piece 42 is bent at a rectangular flat plate-like attachment portion 61 and one side edge portion of the attachment portion 61. The connecting portion 62 of the rectangular flat plate connected to each other and the one side edge portion of the connecting portion 62 opposite to the mounting portion 61 side are bent and connected to each other, and extend so as to form an angle of 90 degrees with respect to the mounting portion 61. And a flat plate-like mounting portion 63.

  FIG. 6 is an exploded perspective view showing a part of the pantograph structure portion 31 in an exploded state, and shows a state where the connecting piece 42 is removed. As shown in FIG. 6, one hinge piece 43 a constituting the hinge 43 is fixed to each outer surface 54 of the plate-like bodies 41 c and 41 d by fastening or welding, and the other hinge piece 43 b is connected to the connection piece 42. Each of the plate-like bodies 41c and 41d is fixed to the main surface 61a of the mounting portion 61 on the housing 13 side by fastening or welding, and these two hinge pieces 43a and 43b are connected via the hinge shaft 43c. The end portions 53 are respectively coupled to the attachment portions 61 of the coupling pieces 42 so as to be rotatable around the axis line J1.

  At this time, the connecting piece 42 is in such a posture that the thickness direction of the mounting portion 61 coincides with the groove width direction X, and the mounting portion 63 is disposed on the upper Z1 side and the housing 13 side with respect to the mounting portion 61. Moreover, as shown in FIG. 1, the lower surface 63b of the mounting part 63 is connected so as to be in surface contact with the upper end surfaces 51 of the plate-like bodies 41c and 41d.

In the present embodiment, as shown in FIG. 1, when the end portions 52 and 53 of the plate-like bodies 41 a to 41 d are connected, they are connected by hinges 43 at two places in the vertical direction Z. The number of connecting points is not limited to two, but may be one or three or more. In the present embodiment, the hinge 43 is realized by a flag hinge as shown in FIG. 4, but is not limited thereto, and may be realized by other types of hinges such as a flat hinge.

  The pantograph structure 31 has a structure that can be expanded and contracted in the groove width direction X by being configured in this way. That is, the connecting piece 42 has a structure that can approach and separate from the housing 13 in the groove width direction X.

  As shown in FIG. 5, the connecting piece 42 is provided with a protruding portion 33 at a lower portion of the main surface 61 b on the housing 12 side of the mounting portion 61. In the present embodiment, the protruding portion 33 is realized by a cylindrical body 33a having a right cylindrical shape, and the cylindrical body 33a has a posture such that the central axis J2 extends along the vertical direction Z, for example, on the main surface 61b. Fixed by welding.

  Specifically, as shown in FIG. 2, the cylindrical body 33 a has a virtual axis in which the central axis J2 includes one diagonal line of the rhombus formed by the upper end surfaces 51 of the four plate-like bodies 41 a to 41 d. It arrange | positions so that it may be located on the plane V, and is fixed. That is, the cylindrical body 33 a is provided so as to move along the groove width direction X on the virtual plane V as the pantograph structure portion 31 expands and contracts. In addition, as the protrusion part 33, you may implement | achieve not only the cylindrical body 33a of a right cylindrical shape but a right columnar rod-shaped body.

  As shown in FIGS. 1 and 2, the pantograph structure portion 31 is arranged on the upper Z1 side of the two hinges 43 forming the connecting portion between the plate-like body 41a and the plate-like body 41c. A tension coil that functions as the biasing means 32 across the hinge 43 and the hinge 43 disposed on the upper Z1 side of the two hinges 43 forming the connecting portion of the plate-like body 41b and the plate-like body 41d. Springs (hereinafter referred to as “tensile coil springs 32”) are attached to the hinges 43 so as to apply a biasing force in a direction in which they are close to each other.

  As described above, in this embodiment, the tension coil spring 32 is installed so as to expand and contract along the groove extending direction Y. Therefore, the expansion / contraction direction of the pantograph structure 31 and the expansion / contraction direction of the tension coil spring 32 are Are orthogonal. The pantograph structure 31 is always held in a predetermined extended state in a normal installation state by the urging force of the tension coil spring 32 and the action of the extension regulating means 34.

  In this embodiment, the extension restricting means 34 is a plate-like body provided in parallel with the first restricting portion 34a fixed to the inner surface 55 on the end 52 side of the plate-like body 41a by fastening or welding. It is comprised by the 2nd control part 34b fixed to the inner surface 55 by the side of the edge part 53 in the body 41d by fastening or welding.

  FIG. 7 is a perspective view showing the configuration of the first restricting portion 34a. The first restricting portion 34a includes a rod-like body 71 formed by bending a long rectangular plate-like metal piece at the center in the width direction so that a cross section perpendicular to the longitudinal direction is substantially V-shaped. A closing piece 72 joined to the inner surface of the rod-shaped body 71 by welding or the like at each end 71a, 71b of the rod-shaped body 71 so as to block the V-shaped groove in the rod-shaped body 71 from the outside in the longitudinal direction. It is constituted by. In addition, since the 2nd control part 34b is comprised the same as the 1st control part 34a, the description is abbreviate | omitted.

  As shown in FIG. 2, the first restricting portion 34a has a longitudinal direction that coincides with the vertical direction Z, and has a V-shaped groove facing the end 53 side of the plate-like body 41a. In the state where the portion is arranged so as to protrude outward from the side surface 52a on the end portion 52 side in the plate-like body 41a, one plate-like portion 71c in the rod-like body 71 is on the end portion 52 side in the plate-like body 41a. Fixed to the inner surface 55.

  As shown in FIGS. 2 and 3, the second restricting portion 34b has a posture in which the longitudinal direction thereof coincides with the vertical direction Z and the V-shaped groove faces the end portion 52 side of the plate-like body 41d. In the state where the bent portion is arranged so as to protrude outward from the side surface 53a on the end portion 53 side in the plate-like body 41d, one plate-like portion 71c in the rod-like body 71 is in the plate-like body 41d. It is fixed to the inner surface 55 on the end 53 side.

Here, when the bending angle of the rod-shaped body 71 in the first and second restricting portions 34a and 34b is α ₀ [°] (where α ₀ <180), the first restricting portion 34a is more specifically illustrated in FIG. As shown in FIG. 1, the angle α [°] formed by the inner surfaces 55 of the pair of plate-like bodies 41a and 41b arranged on the housing 13 side is the bending angle α ₀ that is a first predetermined angle. Sometimes, the other plate-like portion 71d of the rod-like body 71 is fixed to the inner surface 55 on the end portion 52 side of the plate-like body 41a so as to come into surface contact with the inner surface 55 of the plate-like body 41b.

Similarly, more specifically, as shown in FIG. 1, the second restricting portion 34b is configured such that the angle α formed by the inner surfaces 55 of the pair of plate-like bodies 41c and 41d arranged on the housing 12 side is the bending angle α. _When it becomes ₀ , it fixes to the inner surface 55 by the side of the edge part 53 in the plate-shaped body 41d so that the other plate-shaped part 71d in the rod-shaped body 71 may surface-contact with the inner surface 55 of the plate-shaped body 41c. Is done.

Accordingly, the pantograph structure 31, the first and second restricting portions 34a, by 34b functions as a wedge, a pair of plate-like body 41a, an angle alpha formed by the respective inner surfaces 55 and 41b below the bending angle alpha ₀ Is prevented. In other words, a pair of plate-like body 41a, a state in which the angle alpha matches the bending angle alpha ₀ formed by the respective inner surfaces 55 of the 41b, the state of the pantograph structure 31 is stretched to the maximum in the groove width direction X.

Then, as the tension coil spring 32, in a state where the pair of plate members 41a disposed on the building frame 13 side, the angle alpha formed by the respective inner surfaces 55 and 41b match the bending angle alpha _0, the plate-like body 41a and the plate A member capable of applying a biasing force in a direction in which the hinge 43 serving as a connecting portion with the plate-like body 41c and the hinge 43 serving as a connecting portion between the plate-like body 41b and the plate-like body 41d are brought close to each other is selected.

As a result, the pantograph structure 31 has an angle α formed by the inner surfaces 55 of the pair of plate-like bodies 41a and 41b in a normal installation state by the urging force of the tension coil spring 32 and the action of the extension regulating means 34. It is held in a state that matches the bending angle alpha _0. That is, the pair of plate-like body 41a, the state in which the angle alpha formed by the respective inner surfaces 55 and 41b is coincident with the bending angle alpha _0, corresponding to an expanded state in which the predetermined.

Therefore, this predetermined extension state can be adjusted as appropriate by changing the bending angle α ₀ of the rod-like body 71 in the first and second restricting portions 34a, 34b, and accordingly, the tension coil spring 32 is also appropriately adjusted. Selected. In this embodiment, the first and second restricting portions 34a, a bending angle alpha ₀ of the rod-like body 71 in 34b is 60 degrees.

  In the present embodiment, the first and second restricting portions 34a and 34b are used as the extension restricting means 34, but not limited to this, only one of the first and second restricting portions 34a and 34b is used. The structure used may be sufficient.

  Further, in the present embodiment, the tension coil spring 32 extends over the hinge 43 that is the connecting portion between the plate-like body 41a and the plate-like body 41c and the hinge 43 that is the connecting portion between the plate-like body 41b and the plate-like body 41d. Since the first and second restricting portions 34a and 34b are provided, the tension coil spring 32 and the first and second restricting portions 34a and 34b are provided when the pantograph structure portion 31 is most contracted. It is preferable to provide the first and second restricting portions 34a and 34b at positions shifted in the vertical direction Z with respect to the tension coil spring 32 so that they do not interfere with each other. In the present embodiment, as shown in FIG. 3, the first and second restricting portions 34 a and 34 b are provided at positions shifted downward Z <b> 2 with respect to the tension coil spring 32.

As the extension limit means 34, as long as it functions to prevent the pair of the plate-like body 41a, the angle α formed by the respective inner surfaces 55 of 41b becomes the first angle α less than ₀ predetermined The configuration is not limited to that shown in FIG.

  The urging unit 32 may be any unit that generates an urging force that can hold the pantograph structure 31 in a predetermined stretched state. For example, a mechanism that generates such an urging force is incorporated. A so-called auto hinge may be used instead of the hinge 43.

  Returning to FIG. 1, the telescopic structure 21 has a substantially horizontal support surface formed by the upper end surfaces 51 of the plate-like bodies 41 a to 41 d and the upper surface 63 a of the mounting portion 63 in the connecting piece 42 at the upper part. have. That is, the protruding portion 33 is provided to protrude from the support surface toward the housing 12.

  Since the stretchable structure 21 is configured as described above, when the pantograph structure portion 31 contracts from a predetermined stretched state, the dimension L of the support surface in the groove width direction X also decreases. When the pantograph structure 31 expands from the contracted state, the dimension L increases accordingly.

  In the present embodiment, a part of the support surface, specifically, the entire upper end surface 51 of the plate-like bodies 41a and 41b and a part of the upper end face 51 of the plate-like bodies 41c and 41d are supported. In order to reduce the frictional force with the cover body 22 mounted on the surface and improve the sliding of the cover body 22, a sliding material 35 is laid. As the sliding material 35, a sheet body having a low friction characteristic is used. For example, a Teflon (registered trademark) sheet made of a fluororesin is preferably used. 2 and 4 and the like, the sliding material 35 is shown with hatching.

  FIG. 8 is an enlarged cross-sectional view showing a part of the cover body 22 in the groove cover device 10 shown in FIG. As shown in FIG. 2, the cover body 22 includes a plurality of (seven in this embodiment) long plate-like members 91, and the longitudinal direction of the plurality of plate-like members 91 is the groove extending direction Y. In parallel with each other along the groove width direction X, and a pair of plate-like members 91 adjacent to each other in the groove width direction X are coupled to each other around an axis J3 extending in the groove extending direction Y. As shown in FIG. 1, the plate-like member 91 disposed closest to the housing 13 in the groove width direction X is connected to the housing 13 so as to be rotatable. Further, the support surface of the stretchable structure 21 is supported horizontally from below Z2. The plate-like member 91 is made of, for example, a metal material, and is realized by an aluminum mold material in the present embodiment.

  In this embodiment, as shown in FIGS. 1 and 2, the cover body 22 has a plate-like member 91 such that the end on the housing 12 side is disposed on the upper end surface 51 of the plate-like bodies 41 c and 41 d. Is selected. Further, the thickness dimension of the cover body 22 is selected so as to be shorter than the diameter of the protruding portion 33.

  As shown in FIG. 8, the groove cover device 10 configured as described above has the assembly panel body 15 placed on the upper surface 22 a of the cover body 22 and the second edge member 17 installed on the housing 13. It is installed in the housing 13 so that the mounting surface 17a is flush with the mounting surface 17a or the upper surface 22a is disposed slightly below the mounting surface 17a. That is, in the normal installation state of the groove cover device 10 shown in FIG. 1, the lower surface 15 c of the assembly panel body 15 is in contact with the upper surface 22 a of the cover body 22 or is slightly separated.

  Hereinafter, the operation of the groove cover device 10 according to the present embodiment will be described with reference to the drawings. FIG. 9 is a side view showing the groove cover device 10 when the housings 12 and 13 are relatively displaced from the state shown in FIG. 1 in a direction away from each other.

  As shown in FIG. 9, when the housings 12 and 13 are relatively displaced in the direction away from each other, the end 15b of the assembly panel body 15 moves relative to the second edge member 17 toward the housing 12 side, Along with this, a gap d is formed between the end 15 b of the assembly panel body 15 and the second edge member 17.

  At this time, since the groove cover device 10 is not given an external force that contracts in the groove width direction X to the stretchable structure 21, the same state as the normal installation state shown in FIG. 1 is maintained. It becomes. Thus, the groove cover device 10 supports the end 15b of the assembly panel body 15 detached from the second edge member 17 from the lower side Z2 by the cover body 22, and also the end 15b of the assembly panel body 15 and the second edge. The gap d formed with the material 17 can be blocked by the cover body 22 to prevent the groove space 11 from being exposed to the outside.

  FIG. 10 is a side view showing the groove cover device 10 when the housings 12 and 13 are relatively displaced from the state shown in FIG. 1 in the direction of approaching each other, and shows the state when the elastic structure 21 is most contracted. ing. FIG. 11 is a plan view of the groove cover device 10 shown in FIG. 10 as viewed from above.

  As shown in FIG. 10, when the housings 12 and 13 are relatively displaced in the direction in which they are close to each other, the projecting portion 33 that projects from the support surface toward the housing 12 first comes into contact with the outer wall of the housing 12. When the relative displacement occurs, the elastic structure 21 is contracted against the urging force of the tension coil spring 32 by the external force applied through the protrusion 33. Accordingly, as described above, the dimension L in the groove width direction X of the support surface on which the cover body 22 is placed gradually decreases, and eventually the end of the support surface from the housing 13 on the housing 12 side. The distance to the part is shorter than the distance from the housing 13 to the end of the cover body 22 on the housing 12 side. At this time, since the cover body 22 is connected to the pair of adjacent plate-like members 91 so as to be rotatable around the axis J3 as described above, the contraction of the elastic structure 21 is performed as shown in FIG. Accordingly, the plate-like member 91 arranged on the housing 12 side sequentially hangs down in the gap between the attachment portion 61 of the connecting piece 42 and the outer wall of the housing 12 by gravity.

  As described above, according to the groove cover device 10 according to the present embodiment, the two casings 12 and 13 are adjacent to each other through the groove space 11 and are provided so as to protrude from the one casing 12 to the other casing 13 side. When the groove space 11 is covered from the upper side Z1 by the covering body 14, the width of the groove space 11 is widened by an earthquake or the like as shown in FIG. Even if the gap d is formed, the cover body 22 can reliably prevent the gap d from being closed and the groove space 11 from being exposed to the outside. Since the cover body 22 itself is supported from the lower side Z2 by the stretchable structure 21 as described above, even if a pedestrian or the like enters the cover body 22, a pedestrian or the like enters the groove space 11. It can be prevented from falling off.

  Further, the groove cover device 10 is configured such that the elastic structure 21 can be expanded and contracted in the groove width direction X, and the cover body 22 uses a plurality of plate-like members 91, and connects a pair of adjacent plate-like members 91 around the axis J3. Therefore, even if the distance between the casings 12 and 13 is shortened, the elastic structure 21 contracts and the cover body 22 is between the elastic structure 21 and the casing 12. Since it is deformed so that it hangs down, there is no risk of breakage.

  In addition, since the stretchable structure 21 is configured to be held in a predetermined stretched state by the biasing force of the biasing means 32, even if the stretchable structure 21 contracts due to an earthquake, after the earthquake has stopped, It is possible to return to the predetermined extension state again.

  Moreover, according to this embodiment, since the protrusion part 33 is formed in column shape or cylindrical shape, even if it is a case where the outer wall of the housing 12 is inclined with respect to the groove width direction X, the housing The elastic structure 21 can be reliably contracted in the groove width direction X when the 12 and 13 are relatively displaced in the direction approaching each other.

  Further, according to the present embodiment, the first restricting portion 34a is provided on the plate-like body 41a, and the second restricting portion 34b is provided on the plate-like body 41d provided in parallel with the plate-like body 41a. 11, it is possible to prevent the first restricting portion 34a and the second restricting portion 34b from interfering with each other when the elastic structure 21 contracts.

  FIG. 12 is a plan view of the groove cover device 10A according to the second embodiment of the present invention as viewed from above, and shows a normal installation state in which no earthquake or the like has occurred. FIG. 13 is a plan view of the groove cover device 10A viewed from above when the housings 12 and 13 are relatively displaced in a direction close to each other due to the occurrence of an earthquake or the like, and the state when the elastic structure 21 is most contracted. Is shown.

  In addition, 10 A of groove cover apparatuses which concern on this embodiment are comprised partially the same as the groove cover apparatus 10 which concerns on 1st Embodiment. Therefore, in the following, in the groove cover device 10A, a configuration that is different from the groove cover device 10 will be described, and the same configuration will be denoted by the same reference numeral, and redundant description will be omitted.

  As a first difference, in the groove cover device 10 according to the first embodiment, the protruding portion 33 is realized by one cylindrical body 33a. However, in the groove cover device 10A according to the present embodiment, the protrusion portion 33 is realized. The projecting portion 33 is realized by two right cylindrical cylindrical bodies 33a that are configured identically.

  As shown in FIG. 12, the two cylindrical bodies 33a are arranged so as to be spaced apart from each other in the groove extending direction Y in such a posture that each central axis J2 extends along the vertical direction Z. They are arranged so as to be symmetric with respect to the virtual plane V, and are fixed to the main surface 61b of the attachment portion 61 of the connecting piece 42, for example, by welding.

  In the present embodiment, the two right cylindrical cylindrical bodies 33a are used as the projecting portions 33, but two right cylindrical columnar bodies may be used instead.

  According to the present embodiment, since the projecting portion 33 is configured by the two cylindrical bodies 33a as described above, when the casings 12 and 13 are relatively displaced in the direction of approaching each other due to the occurrence of an earthquake or the like. Furthermore, as shown in FIG. 13, the housing 12 can be received by the two cylindrical bodies 33a.

  Thereby, in the state where 10 A of groove cover apparatuses and the housing 12 contact | abutted, the attaching part 61 in the connection piece 42 can be hold | maintained in the attitude | position which becomes parallel or substantially parallel with respect to the wall surface of the housing 12. FIG. Therefore, the load applied to the stretchable structure 21 along with the displacement of the housing 12 can be surely applied along the stretch direction of the stretchable structure 21, and thus stabilize the stretch operation of the stretchable structure 21. be able to.

  As a second difference, in the groove cover device 10 according to the first embodiment, the extension restricting means 34 includes the first restricting portion 34a and the second restricting portion 34b. In the groove cover device 10A, the extension restricting means 34 is constituted by a third restricting portion 34c and a fourth restricting portion 34d.

  In the present embodiment, the third and fourth restricting portions 34c and 34d are configured identically to each other. As shown in FIG. 12, a long rectangular plate-shaped metal piece has a cross section perpendicular to its longitudinal direction. Is realized by a rod-like member formed by bending so as to form a substantially C-shape.

  Specifically, the third and fourth restricting portions 34c and 34d are bent at right angles to the long, rectangular flat plate-like fixing portion 81 and the end portions of the fixing portion 81 in the width direction perpendicular to the longitudinal direction. Long, rectangular flat plate-like connecting portions 82a, 82b and end portions of the connecting portions 82a, 82b opposite to the fixing portion 81, which are bent in a direction close to each other and connected to each other. In detail, the contact portions 83a and 83b are formed in a plane symmetry with respect to a virtual plane orthogonal to the fixed portion 81 and passing through the center in the width direction of the fixed portion 81. ing.

  The third restricting portion 34c has a posture in which the fixed portion 81 faces the housing 13 and the virtual plane passing through the center in the width direction of the fixed portion 81 matches the virtual plane V. Arranged between the two hinges 43 connecting the body 41a and the two hinges 43 connecting the housing 13 and the plate-like body 41b, the fixing portion 81 is fastened or welded to the housing 13. Fixed to. Thereby, the contact part 83a is arrange | positioned so that surface contact can be carried out to the side surface 52a by the side of the housing 13 in the plate-shaped body 41a, and the contact part 83b can surface-contact with the side surface 52a by the side of the housing 13 in the plate-shaped body 41b. Will be placed.

  On the other hand, the fourth restricting portion 34d has a posture in which the fixed portion 81 faces the mounting portion 61 of the connecting piece 42, and the virtual plane passing through the center in the width direction of the fixed portion 81 coincides with the virtual plane V. The fixing portion 81 is disposed between the two hinges 43 that connect the connecting piece 42 and the plate-like body 41c and the two hinges 43 that connect the connecting piece 42 and the plate-like body 41d. Then, it is fixed to the attachment portion 61 of the connecting piece 42 by fastening or welding. Accordingly, the contact portion 83a is disposed so as to be in surface contact with the side surface 53a on the housing 12 side of the plate-like body 41d, and the contact portion 83b is capable of surface contact with the side surface 53a on the housing 12 side of the plate-like body 41c. Will be placed.

In the present embodiment, the contact portion 83a is bent so as to form an angle of 90 + α _{1/2 with} respect to the connecting portion 82a, and the contact portion 83b is bent at an angle of 90 + α _{1/2 with} respect to the connecting portion 82b. It is bent to form. As a result, the normal of the surface of the contact portion 83a opposite to the side facing the fixing portion 81 and the normal of the surface of the contact portion 83b opposite to the side facing the fixing portion 81 are formed. The angle is a first predetermined angle α ₁ [°] (where 180> α ₁ ).

Therefore, when the angle α formed between the inner surface 55 of the plate-like body 41a and the inner surface 55 of the plate-like body 41b coincides with the _first angle α1 set in advance, the side surface of the plate-like body 41a on the side of the housing 13 52a and the contact portion 83a of the third restriction portion 34c are in surface contact with each other, the side surface 52a on the housing 13 side of the plate-like body 41b is in surface contact with the contact portion 83b of the third restriction portion 34c, and The side surface 53a on the housing 12 side of the plate-like body 41d and the contact portion 83a on the fourth regulating portion 34d are in surface contact, and the side surface 53a on the housing 12 side of the plate-like body 41c and the fourth regulating portion 34d. abutment portion 83b brought into surface contact, whereby the pair of the plate-like body 41a, an angle α formed by the respective inner surfaces 55 and 41b is, it is prevented that the first angle α less than ₁ predetermined.

Therefore, the pantograph structure 31 has an angle α formed between the inner surfaces 55 of the pair of plate-like bodies 41a and 41b in a normal installation state due to the urging force of the tension coil spring 32 and the action of the extension regulating means 34. It is held in a state that coincides with the first angle α ₁ determined in advance. That is, the pair of plate-like body 41a, an angle alpha formed by the respective inner surfaces 55 of the 41b, the state in which coincides with the first angle alpha ₁ of predetermined, corresponding to an expanded state in which said predetermined.

The third and fourth regulating portions 34c and 34d are not limited to the shapes used in the present embodiment, and the inner surface 55 of the plate-like body 41a and the plate-like body 41b are not limited. angle alpha formed by the inner surface 55, when they match a first angle alpha ₁ of predetermined, plate-like body 41a, each side 52a of 41b, 52 b or the plate member 41c,, 41d each side 53c of, 53d by contact with an angle formed by the inner surface 55 of the inner surface 55 and the plate-like member 41b of the plate-like body 41a alpha it is configured so as to prevent the a first angle alpha less than ₁ predetermined Anything can be used.

As a third difference, in the groove cover device 10A according to the present embodiment, the angle α formed between the inner surface 55 of the plate-like body 41a and the inner surface 55 of the plate-like body 41b is a predetermined second angle α. _It further includes shrinkage restricting means 36 that prevents the angle from exceeding ₂ [°] (where 180> α ₂ > α ₁ ).

  In the present embodiment, the shrinkage restricting means 36 includes a fifth restricting portion 36a and a sixth restricting portion 36b. In the present embodiment, the fifth and sixth restricting portions 36a and 36b are identical to each other. As shown in FIG. 12, a long rectangular plate-shaped metal piece has a cross section perpendicular to its longitudinal direction. Is realized by a rod-like member formed by bending so as to form a substantially U-shape.

  Specifically, the fifth and sixth restricting portions 36a and 36b are bent at a right angle to a long rectangular plate-like fixing portion 84 and one end portion of the fixing portion 84 in the width direction perpendicular to the longitudinal direction. A long, rectangular flat plate-shaped connecting portion 85 and a long, rectangular flat plate-shaped contact portion 86 which is connected to the end of the connecting portion 85 on the side opposite to the fixed portion 84 by bending toward the fixed portion 84 side. Specifically, the abutting portion 86 extends away from the fixed portion 84 as the distance from the connecting portion 85 increases.

  The fifth restricting portion 36a has a posture in which the fixing portion 84 faces the housing 13, the connecting portion 85 is positioned on the virtual plane V side with respect to the abutting portion 86, and the longitudinal direction thereof coincides with the vertical direction Z. Thus, it is disposed between the two hinges 43 connecting the housing 13 and the plate-like body 41a, and the fixing portion 81 is fixed to the housing 13 by fastening or welding. Thereby, the contact part 86 will be arrange | positioned so that surface contact is possible to the outer surface 54 in the plate-shaped body 41a.

  On the other hand, the sixth restricting portion 36b has a posture in which the fixing portion 84 faces the housing 13, the connecting portion 85 is positioned on the virtual plane V side with respect to the abutting portion 86, and the longitudinal direction thereof coincides with the vertical direction Z. Thus, it is disposed between the two hinges 43 connecting the housing 13 and the plate-like body 41b, and the fixing portion 81 is fixed to the housing 13 by fastening or welding. Thereby, the contact part 86 will be arrange | positioned so that surface contact is possible on the outer surface 54 in the plate-shaped body 41b. At this time, the fifth restricting portion 36a and the sixth restricting portion 36b are disposed symmetrically with respect to the virtual plane V.

In the present embodiment, the contact portion 86, to the connecting portion 85 is bent at an angle of 180-α _2/2. Accordingly, the surface of the fifth restricting portion 36a opposite to the side facing the fixed portion 84 in the contact portion 86, and the side facing the fixed portion 84 in the contact portion 86 of the sixth restricting portion 36b. The angle formed by the opposite surface is a predetermined second angle α ₂ .

Therefore, when the angle between the inner surface 55 of the inner surface 55 and the plate-like member 41b of the plate-like body 41a alpha is, matching the second angle alpha ₂ of predetermined, the outer surface 54 of the plate 41a, The contact portion 86 in the fifth restricting portion 36a is in surface contact, and the outer surface 54 of the plate-like body 41b and the contact portion 86 in the sixth restricting portion 36b are in surface contact, thereby a pair of plate shapes. body 41a, an angle alpha formed by the respective inner surfaces 55 and 41b is, the larger is blocked than the second angle alpha ₂ which predetermined. That is, the pair of plate-like body 41a, an angle alpha formed by the respective inner surfaces 55 of the 41b, the state in which coincides with the second angle alpha ₂ of predetermined, pantograph structure 31 is most contracted state .

That is, in the groove cover device 10A according to the present embodiment, the pantograph structure unit 31 has an angle α between the inner surface 55 of the plate-like body 41a and the inner surface 55 of the plate-like body 41b of α ₁ or more and α ₂ or less. It can be expanded and contracted in the angle range.

Further, the fifth and sixth restricting portions 36a and 36b are not limited to the shapes used in the present embodiment, and the inner surface 55 of the plate-like body 41a and the plate-like body 41b are not limited. angle alpha formed by the inner surface 55, when they match a second angle alpha ₂ of predetermined, by contact with the outer surface 54 or outer surface 54 of the plate 41b, the plate-like body 41a, a plate-like angle between the inner surface 55 and the inner surface 55 of the plate 41b of the body 41a alpha is, as long as it is configured so as to prevent the greater than the second angle alpha ₂ which predetermined.

DESCRIPTION OF SYMBOLS 10 Groove cover apparatus 11 Groove space 12, 13 Housing 14 Groove covering body 21 Expandable structure 22 Cover body 31 Pantograph structure part 32 Energizing means 33 Protrusion part 34 Extension restricting means 35 Sliding material 41a-41d Plate-like body 42 Connection piece 43 Hinge

Claims (10)

Provided in one housing of two housings that are adjacent to each other through a groove space in the horizontal width direction, projecting from the one housing to the other housing side and disposed below the groove covering body covering the groove space, A groove cover device installed in the other housing,
An expansion / contraction structure that includes an urging unit, is configured to be expandable / contractible in the width direction, and has one end portion in the width direction coupled to the other casing, and is normally held in an expanded state by the urging force of the urging unit. The body has a horizontal dimension in which the dimension in the width direction decreases with contraction from the stretched state, and the dimension in the width direction increases with extension from the contracted state to the stretched state. Provided in the lower end of the other end portion in the width direction so as to protrude toward the one housing side from the support surface in the width direction, and separated from the one housing body in the extended state. A telescopic structure having a protrusion to be disposed;
A plurality of long plate-like members are provided, and the plurality of plate-like members are juxtaposed along the width direction so that the longitudinal direction thereof coincides with the groove extending direction perpendicular to the width direction and the vertical direction. And a pair of plate-like members adjacent to each other in the width direction are connected to each other so as to be rotatable around an axis extending in the groove extending direction, and the other casing is the most in the width direction. A groove cover device comprising: a cover body that is connected to the other housing side and is supported horizontally from below by the support surface.   The groove cover device according to claim 1, wherein the stretchable structure is configured to move the projecting portion along the width direction as the stretchable structure is stretched.   3. The groove cover device according to claim 1, wherein the projecting portion is formed of a right columnar body or a right cylindrical body having a central axis extending along a vertical direction.   Each of the end portions on the other housing side is disposed close to each other in the groove extending direction and is connected to the other housing side so as to be rotatable about an axis extending in the vertical direction. The pair of first plate-like bodies and the respective end portions on the other chassis side are rotatable about an axis extending in the vertical direction so that the one chassis-side of the pair of first plate-like bodies can be rotated. A pair of second plate-like bodies connected to each end portion and each end portion on the one housing side of the pair of second plate-like bodies are arranged close to each other in the groove extending direction. The groove according to any one of claims 1 to 3, further comprising a pantograph structure portion configured to be connected to each other so as to be rotatable about an axis extending in a vertical direction in a state where the groove extends. Cover device.   5. The groove cover device according to claim 4, wherein the urging means is disposed across a connecting portion between the first plate-like body and the second plate-like body.   The expansion regulating means for preventing the angle formed by the opposed inner surfaces of the pair of first plate-like bodies from being less than a predetermined first angle is further included. Groove cover device.   The extension restricting means is provided on one first plate-like body, and when the angle formed by the opposing inner surfaces of the pair of first plate-like bodies becomes the predetermined first angle, the other A first restricting portion that contacts the inner surface of the first plate-like body, and one second plate-like body connected to the other first plate-like body, and the pair of first plates And a second restricting portion that comes into contact with the inner surface of the other second plate-like member when the angle formed by the opposing inner surfaces of the plate-like member becomes the first predetermined angle. The groove cover device according to claim 6.   The extension restricting means is provided on the other casing, and when the angle formed by the opposing inner surfaces of the pair of first plate-like bodies becomes the predetermined first angle, the pair of first In the plate-like body, the third restricting portion that is in contact with each side surface facing the other housing, and the connecting piece, the angle formed between the opposing inner surfaces of the pair of first plate-like bodies is 7. The fourth regulating portion according to claim 6, further comprising a fourth restricting portion that contacts each side surface facing the connecting piece in the pair of second plate-like bodies when the first angle is set in advance. Groove cover device.   The shrinkage restricting means for preventing the angle formed by the opposed inner surfaces of the pair of first plate-like bodies from becoming larger than a predetermined second angle is further included. The groove cover apparatus as described in any one.   The shrinkage restricting means is provided on the other casing, and when the angle formed between the opposing inner surfaces of the pair of first plate-like bodies becomes the predetermined second angle, The fifth restricting portion that contacts the outer surface opposite to the inner surface of the plate-like body and the other casing, and the angle formed by the opposed inner surfaces of the pair of first plate-like bodies is the 10. The sixth restricting portion according to claim 9, further comprising a sixth restricting portion that contacts an outer surface opposite to the inner surface of the other first plate-like body when the second angle is determined in advance. Groove cover device.

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