JPS63864Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to the structure of joints in various irrigation channels, drainage channels, and the like.

Waterways are constructed by sequentially connecting concrete products with various cross-sectional shapes such as U-shaped, cylindrical, and rectangular cylindrical shapes depending on the purpose and location, but this type of connection method The problem with waterways is how to create a joint structure that is highly resistant to subsidence and upheaval of the waterway, does not damage the main body of the product, and has an excellent water-stopping effect.

Japanese Patent Application No. 53-30285 (see Japanese Patent Publication No. 57-1665) effectively achieves the above-mentioned problem.
It has an eccentric seat plate type joint structure with a double stopper. As shown in FIGS. 1 and 2, this joint structure includes fastening inserts 6 and 7 buried in the front and rear joint ends of the concrete product 5 for waterway construction,
Fasteners 9 and 1 that are screwed onto these inserts 6 and 7
0 insertion holes 2 and 3 are provided at each of the front and rear ends of the connecting plate 1, and stoppers 4a and 4b are provided protruding from each of the front and rear sides of one of the elongated insertion holes 3 to pass through the insertion holes 3. An eccentric seat plate 11 is rotatably fitted into an eccentric shaft hole 13 of a fastener 10.

During construction, the connecting plate 1 is fitted into the connecting recesses 8, 8 of the two concrete products 5, 5 placed next to each other, which communicate with each other, and is screwed into the insert 6 through the insertion hole 2, which is not a long hole. The fastener 9 to be used is fully tightened from the beginning.
On the other hand, the fastener 10 screwed onto the insert 7 through the elongated insertion hole 3 is loosely temporarily tightened to allow rotation of the eccentric seat plate 11 fitted between the stoppers 4a, 4b. Then, one concrete product is pushed toward the other concrete product until the regular sealing materials 12, 12 attached to one or both of the front and rear joint end surfaces 14, 15 of the concrete products are compressed, and in this process, the eccentric seat The plate 11 can be rotated as necessary. Finally, the fastener 10 is fully tightened.

However, in reality, in order to facilitate the joint processing work during construction, the opening length of the elongated insertion hole 3 of the connecting plate is set to be sufficiently long, so that until the standard sealing material 12 is compressed, Even when the joining end surfaces 14 and 15 of the two concrete products 5 and 5 are not close to each other, the eccentric seat plate 11 can be fitted between the stoppers 4a and 4b, and the fastener 10 can be screwed into the insert 7. ing. Therefore, it is originally necessary to further push the concrete product 5 after fitting the eccentric seat plate 11 as described above, but this was omitted either intentionally or by mistake, and the fastener 10 was fully tightened immediately. Sometimes, the sealing material 12 was not compressed between the joining end surfaces 14 and 15, and the desired water-stopping effect could not be achieved.

Therefore, the purpose of the present invention is to prevent workers from fitting an eccentric seat plate and screwing together its fasteners unless the joining end surfaces of two concrete products come close enough to compress the regular sealing material. To provide an eccentric seat plate type joint structure in which water leakage due to omissions or errors is impossible.

The gist of the joint structure of the present invention will be explained below with reference to the drawings.
The width of the opening of the insertion hole 3 of the connecting plate 1 is set such that the regular sealing material 12 is compressed between the joint end surfaces 14 and 15 of the two adjacent concrete products 5 and 5 for waterway construction, and the circumference of the eccentric seat plate 11 is Distance a between the joining end surfaces 14 and 15 when the surfaces abut against the side surfaces of the front and rear stoppers 4a and 4b of the connecting plate 1
and the diameter d of the fastener 10.

In this joint structure as well, as in the conventional joint structure described above, the connecting plate 1 is fitted into the communicating recesses 8, 8 of the two adjacent concrete products 5, 5, and the connecting plate 1 is fitted at each end thereof. The concrete products 5, 5 are fastened to each joining end by fasteners 9, 10 passing through the insertion holes 2, 3 of the concrete products 5, 5. However, unlike conventional joint structures, the insert 7 does not appear in the insertion hole 3 until the regular sealing material 12 is compressed and the joint end surfaces 14, 15 of adjacent concrete products 5, 5 do not approach each other. Therefore, it is impossible to fit the eccentric seat plate 11 between the stoppers 4a and 4b and to screw the fastener 10 into the insert 7.

The positions of the eccentric seat plate 11 and fastener 10 relative to the insertion hole 3 vary depending on the degree of proximity of the joining end faces 14, 15. Fig. 5 shows the case where a gap equal to the distance a is left between the joining end faces 14, 15, and the fastener 10 is at the hole end 3a farther from the joining end face 14. Fig. 6 shows the case where the joining end faces 14, 15 are in close contact, and the fastener 10 engages with the hole end 3b closer to the joining end face 14. Fig. 7 shows the case where a gap half the distance a is left between the joining end faces 14, 15, and the fastener 10 is engaged with the hole end 3b closer to the joining end face 14.
In this embodiment, as shown in Fig. 8, the shaft hole 13 is provided at the distance a from each of the two orthogonal axes X, Y passing through the center O of the eccentric seat plate 11, so that the straight line _l1 passing through the contact point between the eccentric seat plate 11 and the stoppers 4a, 4b becomes parallel to the lateral axis l2 of the insertion hole 3 or coincides with said axis _l2 according to the degree of rotation of the eccentric seat plate 11, and the distance between _{the straight line l1 and} the axis _l2 is from 0 to √2a.

In the example shown in FIG. 9, the shaft hole 13 is provided eccentrically from only the axis X by the distance a. Therefore, as shown in FIG. 10, when the distance between the joint end surfaces 14 and 15 is equal to the distance a,
The fastener 10 is located at the hole end 3a, and is connected to the straight line l ₁
coincides with the axis _l2 of the insertion hole 3. 11th
As shown in the figure, the joint end surfaces 14 and 15 are in close contact with each other,
Even when the fastener 10 is at the hole end 3b, the straight line
l ₁ and l ₂ match. As shown in FIG. 12, when a gap half the distance a remains between the joining end surfaces 14 and 15, a gap equal to the distance a is placed between the straight lines _l1 and _l2 . In addition, this shaft hole 13
The eccentric distance may be smaller than the distance a depending on the case. Furthermore, the target concrete products are not limited to U-shape, but can also be applied to various cross-sectional shapes such as cylindrical and prismatic shapes.

As described above, in the joint structure of the present invention, the opening width of the insertion hole 3 of the communication plate 1 through which one of the fasteners 10 fitted with the eccentric seat plate 11 is set, Concrete products for use 5,
The distance a between the joint end surfaces 14 and 15 when the joint end surfaces 14 and 15 of the connecting plate 1 are compressed and the circumferential surface of the eccentric seat plate 11 abuts the side surfaces of the front and rear stoppers 4a and 4b of the connecting plate 1. Since the diameter is equal to or less than the sum of the diameter d of the fastener 10, the gap between the joint end surfaces 14 and 15 of the two concrete products is equal to or less than the distance a, and there is no communication between them unless the regular sealing material 12 is compressed. Both stoppers 4 of plate 3
It becomes impossible to fit the eccentric seat plate 11 between a and 4b and to screw the fastener 10 into the insert. Therefore, the standard sealing material 12 will not be left in an uncompressed state due to omissions, misconceptions, confirmation mistakes, etc. by workers, and the water-stopping effect of the compressed standard sealing material can be accurately obtained. be.

[Brief explanation of the drawing]

Figure 1 is a perspective view of the water channel before connection using a conventional joint structure, Figure 2 is a front view of the main part of the waterway after connection, and Figure 3 is a joint structure according to an embodiment of the present invention. Figure 4 is a front view of the main part after connection, and Figures 5, 6, and 7 show the eccentric seat plate and fasteners depending on the presence and size of construction errors. An enlarged front view of the joint section showing the difference in position, Fig. 8 is a front view of the eccentric seat plate used in the joint structure of Figs. 5 to 7, and Fig. 9 shows the eccentric seat plate shown in Fig. 8. 10, 11, and 12 are front views of eccentric seat plates with different eccentric distances of the shaft holes of fasteners, and FIGS. FIG. 7 is a front view corresponding to FIGS. 1... Communication plate, 2... Insertion hole, 3... Elongated insertion hole, 4a, 4b... Stopper, 5...
Concrete product, 6, 7... Insert for fastening, 8... Recess for connection, 9, 10... Fastening tool, 1
1...Eccentric seat plate, 12...Standard seal material, 13...
...shaft hole, 14, 15... joint end surface.

Claims (1)

[Scope of utility model registration request] A concrete product 5 for constructing a waterway with fastening inserts 6, 7 embedded in each of the front and rear joint ends; fastening tools 9, 10 screwed into the inserts 6, 7;
A connecting plate 1 having insertion holes 2 and 3 through which the fasteners 9 and 10 are inserted at each front and rear end, and stoppers 4a and 4b protruding from each of the front and rear sides of one elongated insertion hole 3. and; Concrete product for waterway construction 5
a regular sealing material 12 that is attached to one or both of the front and rear joint end surfaces 14, 15 and compressed between the joint end surfaces 14, 15 of two adjacent concrete products 5, 5 for waterway construction; It consists of an eccentric seat plate 11 which is rotatably fitted into a fastener 10 that passes through the elongated insertion hole 3, and whose peripheral surface abuts the side surfaces of the respective stoppers 4a and 4b, and the opening width of the elongated insertion hole 3. , the regular sealing material 12 is attached to the joining end surface 1.
The distance a between the joining end surfaces 14 and 15 and the diameter of the fastening tool 10 when the circumferential surface of the eccentric seat plate 11 abuts the side surface of each of the stoppers 4a and 4b. The joint structure of the waterway is made less than the sum of d.