JP7101100B2 - Closure fixed structure - Google Patents

Description

In the present invention, the gutter block and the upper lid block metal fittings are configured so that the gutter block can be removed and fixed via a metal fitting having a predetermined structure compatible with both blocks in order to fix or remove the upper lid block. Regarding the closed lid fixing structure.

Conventionally, when the upper lid block is closed to the gutter block, the upper lid block is displaced or detached due to the running vibration of the vehicle or the like. If this is left unattended, there is an unexpected danger to pedestrians.

Therefore, both blocks are tightened and fixed via bolts, fixing tools, etc. (see, for example, Patent Document 1 and Patent Document 2).

Jitsuzensho 62-08897 No. Japanese Unexamined Patent Publication No. 2000-291118

A method of tightening and fixing both blocks with bolts as in the conventional technique has been implemented, but the bolt tightening structure is fragile and the upper lid block cannot be completely closed and fixed to the gutter block for a long period of time, resulting in deterioration. Together with this, it was the cause of the road accident.

On the contrary, if the upper lid block is fixed too firmly, the removal work becomes complicated when it becomes necessary to remove the lid block as needed, and the fixing bolt is corroded and the bolt release operation is performed. Various problems have occurred, such as the fact that it becomes impossible to remove the lid block, and if these problems are left unattended, the lid block will inadvertently come off, causing an unexpected accident to the traveling vehicle. , There was a risk of causing problems in the walking of pedestrians.

The present invention has been made in view of such circumstances, and in order to fix or remove the upper lid block to the gutter block, the removal and fixing work can be performed via a metal fitting having a predetermined structure compatible with both blocks. It provides a closed lid fixing structure by the metal fittings of the gutter block and the upper lid block configured in.

In order to solve the above-mentioned conventional problems, in the present invention, a side groove fitting for connecting a lid is embedded in the top end of the side groove block, the upper surface thereof is exposed on the block surface, and a flat plate is formed on the bottom surface of the side edge of the upper lid block. An upper lid metal fitting made of a pressure-welded body is embedded, the surface of which is exposed on the block surface, and the upper lid metal fitting and the side groove metal fitting are vertically opposed to each other with the upper lid block closed in the side groove block. The exposed surface of the metal fitting and the exposed surface of the side groove metal fitting are joined by vertical contact joining, or the block surface of the upper lid block and the block surface of the side groove block are joined by vertical contact joining. Moreover, the metal fittings for the side groove are composed of a hollow case with a long hole for inserting the bolt body on the ceiling surface by opening the inner side surface side of the block for the side groove, and the washer and the bolt head are provided inside the hollow case. The bolt head holding space for storage is used, and the upper lid bracket is composed of a pressure welder with a connecting bolt insertion hole in the center. A connecting bolt that protrudes above the long hole for inserting the bolt body from the head holding space protrudes above the pressure welding body of the upper lid fitting from the connecting bolt insertion hole, and a tightening nut is screwed onto the connecting bolt on the upper surface of the pressure welding body. The top lid block is tightly joined to the side groove metal fittings or the block surface of the top lid block is tightly joined to the side groove block surface. The top lid block is closed and fixed to the side groove block in at least one of the close contact states. It is intended to provide a closed lid fixing structure by metal fittings for a side groove block and an upper lid block.

Further, in the closed lid fixing structure according to the present invention, a urging spring and a washer receiving the urging spring are interposed between the tightening nut screwed to the connecting bolt protruding above the pressure welding body and the upper surface of the pressure welding body. It is characterized by that.

According to the invention of claim 1, a gutter fitting for connecting a lid is embedded in the top end of the gutter block, the upper surface thereof is exposed on the surface of the block, and a flat plate-shaped pressure welded body is formed on the bottom surface of the side edge of the upper lid block. A metal fitting for the upper lid is embedded, and the surface thereof is exposed on the surface of the block. The exposed surface of the gutter and the exposed surface of the gutter fitting are vertically abutted and joined, or the block surface of the gutter block and the block surface of the gutter block are vertically abutted and joined. Since it is configured, by abutting and joining the gutter metal fittings embedded in each block in advance and the upper lid metal fittings, the entire block is surely joined and there is no possibility that the upper lid block will be inadvertently removed.

Moreover, the metal fittings for side grooves consist of a hollow case with a long hole for inserting the bolt body on the ceiling surface with the inner side of the block for side grooves open, and the inside of the hollow case holds the bolt head for storing the washer and bolt head. As a space, the upper lid metal fitting is composed of a pressure welder having a connecting bolt insertion hole in the center, and when the upper lid block is closed to the side groove block, the bolt head holding space of the hollow case in the side groove metal fitting is bolted. The connecting bolt protruding above the long hole for inserting the main body is configured to protrude above the pressure welding body of the upper lid fitting from the connecting bolt insertion hole, and the tightening nut is screwed to the connecting bolt on the upper surface of the pressure welding body. The top lid block is closed to the side groove block by closely joining the top lid bracket to the side groove bracket or by closely joining the block surface of the top lid block to the block surface of the side groove block. When the lid is fixed, the metal fittings are joined and fixed via screw tightening of the connecting bolt and the tightening nut, which has the effect of ensuring that each block can be integrally connected.

Further, since the tightening work of the connecting bolt is also performed by the screwing operation with the tightening nut, there is an effect that the joining and fixing work of each block can be easily performed.

Further, even when it becomes necessary to remove the upper lid block when inspecting the inside of the gutter block, there is an effect that the inside of the gutter block can be inspected by a simple operation of removing the tightening nut from the connecting bolt.

According to the invention of claim 2, since the urging spring and the washer receiving the urging spring are interposed between the tightening nut screwed to the connecting bolt protruding above the pressure welding body and the upper surface of the pressure welding body, the vehicle travels. Even if the tightening nut is inadvertently loosened due to the passage of cars or pedestrians or vibrations such as earthquakes, the urging spring always keeps the pressure welder of the upper lid bracket on the side groove bracket side between the upper surface of the pressure welder and the tightening nut. There is an effect that the state of close contact between the exposed surfaces of each metal fitting and the state of close contact between the surfaces of each block can be reliably maintained by close urging.

It is an overall perspective view which shows the structure of the gutter block and the upper lid block provided with the closed lid fixing structure of this invention. It is a perspective view which shows the structure of the gutter block provided with the gutter metal fitting which concerns on this invention. It is a top view which shows the structure of the gutter block provided with the gutter metal fitting which concerns on this invention. It is a perspective view which shows the structure of the block for the upper lid provided with the metal fitting for the upper lid which concerns on this invention. It is an enlarged plan view which shows the structure of the block for the upper lid provided with the metal fitting for the upper lid which concerns on this invention. It is an enlarged bottom view which shows the structure of the upper lid block provided with the upper lid metal fitting which concerns on this invention. It is a partially enlarged side sectional view schematically showing the embedded installation state of each metal fitting which concerns on this invention in each block. It is a partially enlarged side sectional view schematically showing the embedded installation state of each metal fitting which concerns on this invention in each block. It is a perspective view which shows the structure of the gutter metal fitting and the upper lid metal fitting which constitute the closed lid fixing structure of this invention. FIG. 3 is a sectional view taken along the line AA showing the configuration of the gutter fitting according to the present invention. It is a perspective view which shows the vertical contact joint state of the metal fitting for a gutter and the metal fitting for an upper lid which concerns on this invention. It is a schematic front view which shows the modification 1 of the embedding installation mode of the gutter metal fitting and the upper lid metal fitting in various blocks to which the closed lid fixing structure which concerns on this invention is applied. It is a schematic front view which shows the modification 2 of the embedding installation mode of the gutter metal fitting and the upper lid metal fitting in various blocks to which the closed lid fixing structure which concerns on this invention is applied. It is a schematic front view which shows the modification 3 of the embedded installation mode of the gutter metal fitting and the upper lid metal fitting in various blocks to which the closed lid fixing structure which concerns on this invention is applied. It is a schematic front view which shows the example of use for the gutter block and the upper lid block when the urging spring and the washer are provided in the closed lid fixing structure which concerns on this invention.

The gist of the present invention is that a side groove fitting for connecting a lid is embedded in the top end of a side groove block, the upper surface thereof is exposed on the surface of the block, and the bottom surface of the side edge of the upper lid block is made of a flat plate-shaped pressure contact body for the upper lid. The metal fittings are embedded and the surface is exposed on the surface of the block. The exposed surface of the side groove metal fitting is configured to be in a top-bottom abutment joint or at least one of the top and bottom abutment joints between the block surface of the upper lid block and the block surface of the side groove block. The metal fittings for side grooves consist of a hollow case with a long hole for inserting the bolt body on the ceiling surface with the inner side of the block for side grooves open, and the inside of the hollow case is a bolt head holding space for storing the washer and bolt head. The upper lid metal fitting is composed of a pressure welder having a connecting bolt insertion hole in the center, and when the upper lid block is closed to the side groove block, the bolt body is formed from the bolt head holding space of the hollow case in the side groove metal fitting. A connecting bolt that protrudes above the long hole for insertion protrudes above the pressure welding body of the upper lid metal fitting from the connecting bolt insertion hole, and a tightening nut is screwed to the connecting bolt on the upper surface of the pressure welding body, so that the metal fitting for the side groove is used for the upper lid. The upper lid block is closed and fixed to the side groove block by closely joining the metal fittings or by closely joining the block surface of the upper lid block to the block surface of the side groove block at least one of them.

Further, the urging spring and the washer that receives the urging spring are interposed between the tightening nut screwed to the connecting bolt protruding above the pressure welding body and the upper surface of the pressure welding body.

Examples of the present invention will be described in detail with reference to the drawings. FIG. 1 is an overall perspective view showing the configuration of a side groove block and an upper lid block provided with the lid closing fixing structure of the present invention, and FIGS. 2 and 3 are a perspective view and a plan view showing the configuration of a side groove block provided with side groove fittings. 4 and 4 are perspective views showing the configuration of the upper lid block including the upper lid metal fitting, and FIGS. 5 and 6 are an enlarged plan view and an enlarged bottom view showing the configuration of the upper lid block including the upper lid metal fitting, FIGS. 7 and 6 and FIGS. 8 is a partially enlarged side sectional view schematically showing the state of each metal fitting embedded in each block, FIG. 9 is a perspective view showing the configuration of the side groove metal fitting and the upper lid metal fitting constituting the closed lid fixing structure, and FIG. 10 is a perspective view. A cross-sectional view showing the configuration of the side groove metal fitting, FIG. 11 is a perspective view showing a vertical contact joint state between the side groove metal fitting and the upper lid metal fitting.

Reference numeral 10 in FIG. 1 is a gutter fitting for connecting a lid embedded in the top end (block upper surface 1a) of the gutter block 1. As shown in FIGS. 1 to 3, the gutter metal fitting 10 is made of concrete in a block mold so that the surface 10a of the gutter block 1 is exposed on the upper surface 1a of the gutter block 1 when the gutter block 1 is molded. When it flows in, it is buried integrally.

As shown in FIGS. 1 and 4 to 6, an upper lid metal fitting 20 made of a flat plate-shaped pressure contact body 21 is embedded in the bottom of the side edge of the upper lid block 2, and as shown in FIGS. 7 and 8. The surface 20a is exposed on the block surface (side edge bottom surface 2a).

Specifically, as a mode of embedding and installing the gutter metal fittings 10 and the upper lid metal fittings 20 in the blocks 1 and 2, the surface 10a of the gutter metal fittings 10 is the upper surface of the gutter block as shown in FIG. 7A. The gutter metal fittings 10 and the upper lid metal fittings 20 are embedded in the blocks 1 and 2 so that the surface 20a of the upper lid metal fittings is exposed flush with 1a and the surface 20a of the upper lid metal fittings is exposed flush with the surface of the upper lid block. ing.

Further, in another buried installation mode of the metal fittings 10 and 20 shown in FIG. 7B, the gutter metal fitting 10 is embedded in the gutter block 1 so as to form a recess 1c on the block surface 1a, and the surface 10a is recessed. It is exposed at a position below the top surface 1a of the block as the bottom surface.

The upper lid metal fitting 20 projects its lower portion (flat pressure contact body main body 24) downward from the block surface 2a (side edge bottom surface 2a) so as to correspond to the recess 1c of the gutter block 1 of the upper lid block 2. It is buried in the upper part and its surface 20a is exposed below the block surface 2a (bottom surface).

Further, in another buried installation mode of the metal fittings 10 and 20 shown in FIG. 7 (c), the gutter metal fitting 10 projects the upper portion 11a (hollow case 11 in this embodiment) upward from the block upper surface 1a to project the gutter block. It is embedded in 1 and its surface 10a is exposed above the block upper surface 1a.

The upper lid metal fitting 20 is embedded in the upper lid block 2 so as to form a recess 2c in the block surface 2a so as to correspond to the protruding upper portion 11a of the gutter metal fitting 10, and the block surface 2a (with the surface 20a as the bottom surface of the recess). It is exposed above the bottom).

That is, in the embedded installation mode of the metal fittings 10 and 20 in the blocks 1 and 2 shown in FIG. 7, the upper lid metal fitting 20 and the gutter metal fitting 10 are used in a state where the upper lid block 2 is closed to the gutter block 1. Is in a vertically opposed state, and the exposed surface 10a of the gutter fitting 10 and the exposed surface 10a of the upper lid fitting 20 are in a vertically abutting joint state, and further, the block surface 1a of the gutter block 1 and the block of the upper lid block 2 are placed. It is configured so that the surface 2a and the surface 2a are in a state of upper and lower contact bonding.

Further, in another buried installation mode of the metal fittings 10 and 20 shown in FIG. 8A, the gutter metal fitting 10 is embedded in the gutter block 1 so as to form a recess 1c in the block surface 1a, and the surface 10a is recessed. It is exposed at a position below the top surface 1a of the block as the bottom surface.

The upper lid metal fitting 20 is embedded in the upper lid block 2 so as to form a recess 2c in the block surface 2a so as to correspond to the protruding upper portion 11a of the gutter metal fitting 10, and the block surface 2a (with the surface 20a as the bottom surface of the recess). It is exposed above the bottom).

That is, in the embedded installation mode of the metal fittings 10 and 20 in the blocks 1 and 2 shown in FIG. 8 (a), the upper lid block 2 is closed to the gutter block 1 and shown in FIG. 8 (b). As described above, the upper lid metal fitting 20 and the gutter metal fitting 10 are vertically opposed to each other, and a gap is formed between the exposed surface 10a of the side groove metal fitting 10 and the exposed surface 10a of the upper lid metal fitting 20, and the gutter is formed in the same gap. The block surface 1a of the gutter block 1 and the block surface 2a of the upper lid block 2 are configured to be in a vertical contact joint state with a connecting bolt 30 for connecting the metal fitting 10 and the upper lid metal fitting 20 interposed therebetween. There is.

With this configuration, the gutter fitting 10 and the upper lid fitting 20 bend in the proximity direction via the connecting bolt 30 and attract each other by the return reaction force, so that the block surface 1a of the gutter block 1 and the block surface of the upper lid block 2 are attracted to each other. The state of close contact with 2a is maintained.

Further, contrary to the buried installation mode shown in FIG. 8, the metal fittings 10 and 20 are projected from the block surfaces 1a and 2a so that the exposed surfaces 10a and 20a of the metal fittings 10 and 20 are in close contact with each other. May be.

Specifically, the gutter fitting 10 has an upper portion 11a (hollow case 11 in this embodiment) protruding upward from the block upper surface 1a and embedded in the gutter block 1 so that the surface 10a is exposed above the block upper surface 1a. The upper lid metal fitting 20 projects its lower portion (flat pressure contact body main body 24) downward from the block surface 2a (side edge bottom surface 2a) and is embedded in the upper part of the upper lid block 2 so that the surface 20a is embedded in the block surface 2a (the block surface 2a (side edge bottom surface 2a). It is exposed below the bottom).

In short, in the closed lid fixing structure A of the present invention, with the upper lid block 2 closed to the gutter block 1, the upper lid metal fitting 20 and the gutter metal fitting 10 are vertically opposed to each other so that their axes are aligned with each other. At the same time, the surface 10a of the gutter fitting 10 and the surface 20a of the upper lid fitting 20 are exposed on the surface of each block so that the exposed surface 10a of the gutter fitting 10 and the exposed surface 20a of the upper lid fitting 20 are in vertical contact with each other. The block surface 1a of the gutter block 1 and / and the block surface 2a of the gutter block 2 are configured to be in a vertical contact joint state.

In other words, in the closed lid fixing structure A, with the upper lid block 2 closed to the gutter block 1, the block surface 2a of the upper lid block 2 and the block surface 1a of the gutter block 1 are vertically contacted and joined. It is configured to realize at least one of the upper and lower contact joining states of the exposed surface 10a of the upper lid fitting 20 and the exposed surface 10a of the gutter fitting 10.

In order to exert a solid lid closing function, the block surface 2a of the upper lid block 2 and the block surface 1a of the gutter block 1 are vertically contacted and joined, and the block surface 2a of the upper lid block 2 is moved up and down. Both the upper and lower contact joint states of the contact joint state are preferable.

Further, as shown in FIG. 9, the upper lid metal fitting 20 is configured by providing a connecting bolt insertion hole 22 in the flat plate-shaped pressure welding body 21, and when the upper lid block 2 is closed in the gutter block 1. The connecting bolt 30 protruding from the lower gutter fitting 10 is configured to protrude upward from the pressure welding body 21 from the connecting bolt insertion hole 22.

Then, by screwing and tightening the tightening nut 31 to the protruding connecting bolt 30, the upper lid metal fitting 20 can be joined to the gutter metal fitting 10 to be integrally tightened. The tightening nut 31 may be a cap nut.

Further, the gutter metal fitting 10 and the upper lid metal fitting 20 do not necessarily have to be joined to each other, and the gutter metal fitting 20 is brought close to the gutter metal fitting 10 via the connecting bolt 30 and the tightening nut 31 to form the gutter block 1. The upper lid block 2 may be joined.

That is, by screwing the tightening nut 31 to the connecting bolt 30 with the upper surface 20b of the pressure welded body, the upper lid metal fitting 20 is tightly joined to the gutter metal fitting 10, or the block surface 1a of the gutter block 1 is connected to the block surface of the upper lid block 2. It enables a tight junction state of at least one of 2a to be tightly bonded.

As shown in FIGS. 9 and 11, the gutter metal fittings 10 and the upper lid metal fittings 20 are provided with a substantially L-shaped gutter anchor 13 and a lid anchor 23. As shown in FIGS. 1 to 6, each anchors 13 and 23 are formed in a substantially L shape and embedded in a block together with the metal fittings 10 and 20 to ensure that the metal fittings 10 and 20 are buried and fixed in the block. ing.

Moreover, as shown in FIGS. 3, 9, and 10, the side groove metal fitting 10 is a hollow case in which a long hole 12 for inserting a bolt body is provided on the ceiling surface (exposed surface 10a) by opening the inner side surface side of the side groove block. The hollow case 11 is composed of a bolt head holding space 16 for accommodating a washer 32 and a bolt head 30a, and the upper lid metal fitting 20 is composed of a pressure welding body 21 having a connecting bolt insertion hole 22 in the center. In the state where the upper lid block 2 is closed to the side groove block 1, the connecting bolt 30 protruding above the elongated hole 12 for inserting the bolt body from the bolt head holding space 16 of the hollow case 11 in the side groove metal fitting 10 is connected to the connecting bolt. The bolt head holding space 16 projects from the insertion hole 22 above the pressure welding body 21 of the upper lid fitting 20, and the hexagon head 30a of the bolt 30 is fitted to the bolt head 30a so that the bolt 30 cannot rotate. It forms a detent structure.

To be precise, as shown in FIG. 9, the hexagon head width D1 of the bolt 30 and the bolt head holding portion width D2 have substantially the same fitting width.

As shown in FIG. 9, the upper lid fitting 20 forms a connecting bolt insertion hole 22 at the central portion of the pressure contact body 21.

Then, in a state where the upper lid block 2 is closed to the gutter block 1, the connecting bolt 30 protruding upward from the bolt head holding space 16 of the gutter fitting 10 inserts the connecting bolt insertion hole 22 into the upper lid fitting 20. It is configured to project upward from the pressure welded body 21.

A tightening nut 31 is screwed into the connecting bolt 30, and a washer 32 is inserted between the tightening nut 31 and the connecting bolt head 30a by tightening and rotating the tightening nut 31 in the screwing direction on the upper surface 20b of the pressure welding body. The bolt head holding portion top plate 10b of the side groove metal fitting 10 and the pressure welding body 21 of the upper lid metal fitting 20 are sandwiched therein, and the side groove metal fitting 10 and the upper lid metal fitting 20 are integrally joined as shown in FIG. To.

A washer 32 is attached to the connecting bolt head 30a and the tightening nut 31, and in particular, the side groove metal fitting 10 is provided with a long hole 12 for inserting the bolt body on the ceiling surface 10a by opening the inner side surface side of the side groove block. Since the hollow case 11 is composed of a hollow case 11 and a bolt head holding space 16 for accommodating a washer 32 and a bolt head 30a is provided inside the hollow case 11, the left and right wall surfaces of the space have washers as shown in FIGS. 9 to 11. A step is formed for accommodating 32 and the bolt head 30a.

Further, as shown in FIGS. 9 and 11, an urging spring 31a and an urging spring 31a are provided between the tightening nut 31 screwed into the connecting bolt 30 protruding above the pressure welding body 21 and the upper surface 20b of the pressure welding body. It intervenes with the receiving washer 31b.

Specifically, the washer 31b is loosely fitted to the connecting bolt 30 protruding above the pressure welding body 21, the urging spring 31a is loosely fitted from above, and finally the tightening nut 31 is screwed. There is.

With such a configuration, even if the tightening nut 31 is inadvertently loosened, the urging spring 31a between the bottom surface of the tightening nut 31 and the upper surface 20b of the pressure contact body is the pressure contact body 21 of the upper lid metal fitting 20 via the washer 31b. Is constantly urged close to the gutter metal fitting 10 side so that the block surface 1a of the gutter block 1 and the block surface 2a of the upper lid block 2 are in close contact with each other and the exposed surface 10a of the gutter metal fitting 10 and the upper lid metal fitting 20. The state of close contact with the exposed surface 20a can be made solid.

Moreover, the positions of the connecting bolt 30 protruding upward from the pressure welding body 21 from the connecting bolt insertion hole 22 and the tightening nut 31 screwed and tightened to the connecting bolt 30 are located on the upper lid block 2 as shown in FIGS. 1, 4 to 6. It is arranged at a vertical position facing the upper surface water passage hole 2b provided in the above. Therefore, the tightening release operation can be performed by using a jig such as a wrench from the upper surface water passage hole 2b provided in the upper lid block 2.

With this configuration, even when the upper lid block 2 is closed to the gutter block 1, the tightening nut 31 is tightened and loosened from above the upper lid block 2 using a jig such as a wrench inserted from the upper surface water passage hole 2b. It can be performed.

When the gutter metal fitting 10 is embedded in the gutter block 1, the gutter metal fitting 10 is embedded in the bulging portion 1'(top end 1') formed by bulging the inner upper part of the gutter block 1 inward. I decided to do it.

Next, modifications 1 to 3 of the buried installation mode of the gutter metal fittings 10 and the upper lid metal fittings 20 when the closed lid fixing structure A according to the present invention is applied to various gutter blocks and the upper lid block will be described. .. 12 to 14 are schematic front views showing an embodiment in which the gutter metal fitting 10 and the upper lid metal fitting 20 are embedded and installed in various blocks to which the closed lid fixing structure A is applied.

[Modification 1]
In the first modification shown in FIGS. 12 (a) and 12 (b), the gutter block 101 has the lid receiving step portions 102 on both upper sides of the inner side wall facing inward along the longitudinal direction of the gutter block. The gutter fitting 10 is formed so as to protrude, and the lid receiving step portion 102 of the gutter block 101 is embedded as the top end 1'. The upper lid metal fitting 20 is embedded in the bottom surface of the side edge of the upper lid block 201 so as to correspond to the gutter metal fitting 10 embedded in the gutter block 101.

[Modification 2]
In the second modification shown in FIGS. 13 (a) and 13 (b), the upper lid block 201 is formed on the lower surface thereof to have the same width as the opening width of the upper opening of the gutter block 101 and is inserted into the upper opening. At the same time, the inner lid convex portion 202 that engages with the lid receiving step portion 102 of the gutter block 101 at both end edges is formed so as to project downward, and the upper lid metal fitting 20 is formed on the inner lid convex portion 202 of the upper lid block 201. It is buried in the bottom of the gutter. Reference numeral 203 in FIG. 13 is a flange-shaped upper lid edge portion extending upward and left and right of the inner lid convex portion 202 and engaging with the upper ends of the left and right side walls of the gutter block 101 at the bottom portion thereof.

[Modification 3]
In the modified example 3 shown in FIGS. 14 (a) and 14 (b), the gutter metal fittings are not embedded in advance and integrally molded as in the modified example 1 and the modified example 2, but the so-called precast gutter block. The buried installation mode in which the gutter metal fittings are embedded in the existing gutter block afterwards is shown.

That is, the gutter metal fitting 10 is a gutter anchor 13 that penetrates the flat plate-shaped metal fitting mounting stay 130 protruding from the left and right sides of the hollow case 11 and the metal fitting mounting stay 130 to serve as a top end 1'. It is provided with a gutter anchor 131 that is inserted and fixed to the step portion 102.

A male screw portion is formed on the upper portion of the differential anchor 131, and by screwing a fixing nut to the male screw portion, the gutter metal fitting 10 is attached to the lid receiving step portion 102 via the metal fitting mounting stay 130. It is fixedly installed. The difference bar anchor 131 is inserted and fixed at a position where it does not interfere with the reinforcing bar R of the gutter block 101 and is embedded.

As described above, the gutter block 101 according to the modified examples 1 to 3 is a so-called drop groove type gutter block in which the lid receiving step portion 102 is formed at a position below the uppermost surface at the upper part of the left and right inner side walls. The gutter metal fitting 10 is embedded and installed in the lid receiving step 102 as the top end 1'with respect to the block 101.

Next, to each block of the closed lid fixing structure A in which the urging spring 31a and the washer 31b receiving the urging spring 31a are interposed between the tightening nut 31 screwed to the connecting bolt 30 and the upper surface 20b of the pressure contact body. An application example will be described. FIG. 15 is a schematic front view showing a gutter block and an upper lid block in which a closed lid fixing structure A provided with an urging spring 31a and a washer 31b is constructed.

The upper lid block 210 is a curb body groove lid having a curb portion 211 projecting upward at the center of the upper surface. That is, the gutter block 1 and the upper lid block 210 are buried and installed so as to separate the roadway and the sidewalk.

A urging spring 31a and a washer 31b for receiving the urging spring 31a are interposed between the tightening nut 31 screwed to the connecting bolt 30 and the upper surface 20b of the pressure contact body with respect to the gutter block 1 and the upper lid block 210. By constructing the closed lid fixing structure A, even if the tightening nut 31 is inadvertently loosened due to the passage of traveling vehicles or pedestrians or vibrations such as earthquakes, it is attached between the upper surface 20b of the pressure welder and the tightening nut 31. The force spring 31a constantly urges the pressure welding body 21 of the upper lid metal fitting 20 to the side of the gutter metal fitting 10 so that the side groove metal fitting 10 and the upper lid metal fitting 20 are in close contact with each other and the block surface 1a of the gutter block 1 and the upper lid. There is an effect that the state of the block 2 in close contact with the block surface 2a can be reliably maintained.

As described above, according to the present invention, by abutting and joining the gutter metal fittings embedded in each block in advance and the upper lid metal fittings, the entire block is inadvertently joined. There is no risk of the top lid block coming off.

Moreover, when the upper lid block is closed and fixed to the gutter block, the metal fittings are joined and fixed via the screw tightening of the connecting bolt and the tightening nut, and there is an effect that the blocks can be reliably and integrally connected.

Further, since the tightening work of the connecting bolt is also performed by the screwing operation with the tightening nut, there is an effect that the joining and fixing work of each block can be easily performed.

Further, even when it becomes necessary to remove the upper lid block when inspecting the inside of the gutter block, there is an effect that the inside of the gutter block can be inspected by a simple operation of removing the tightening nut from the connecting bolt.

1 Side groove block 2 Top lid block 10 Side groove metal fittings 11 Hollow case 12 Long hole 13 Side groove anchor 20 Top lid metal fittings 21 Pressure welder 22 Connecting bolt insertion hole 23 Lid anchor 30 Connecting bolt 31 Tightening nut 31a Bounce spring 31b Washer 32 washer

Claims (2)

A gutter fitting for connecting the lid is embedded in the top end of the gutter block, and the upper surface is exposed on the block surface.
A metal fitting for the upper lid made of a flat plate-shaped pressure contact body was embedded in the bottom surface of the side edge of the block for the upper lid, and the surface thereof was exposed on the surface of the block.
With the upper lid block closed to the gutter block, the upper lid metal fittings and the gutter metal fittings are vertically opposed to each other, and the exposed surface of the upper lid metal fittings and the exposed surface of the gutter metal fittings are joined by vertical contact or the upper lid. The block surface of the gutter block and the block surface of the gutter block are configured to be in a contact-bonded state of at least one of them.
Moreover, the gutter metal fittings consist of a hollow case with a long hole for inserting the bolt body on the ceiling surface with the inner side of the gutter block open, and the bolt head holding the washer and bolt head inside the hollow case. As a space
The upper lid fitting is composed of a pressure welder with a connecting bolt insertion hole in the center.
With the upper lid block closed in the gutter block, a connecting bolt protruding above the long hole for inserting the bolt body from the bolt head holding space of the hollow case in the gutter metal fitting is pressed from the connecting bolt insertion hole to the upper lid metal fitting. By projecting upward from the body and screwing a tightening nut to the connecting bolt on the upper surface of the pressure welder, the upper lid metal fitting is closely joined to the gutter metal fitting or the block surface of the upper lid block is closely joined to the gutter block block surface. A closed lid fixing structure using metal fittings for a gutter block and an upper lid block, characterized in that the upper lid block is closed and fixed to the gutter block in a close contact state of at least one of them. The first aspect of claim 1, wherein a urging spring and a washer that receives the urging spring are interposed between the tightening nut screwed to the connecting bolt protruding above the pressure welding body and the upper surface of the pressure welding body. Closed fixing structure with metal fittings for gutter block and top lid block.

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