JP4125682B2 - Connection device for culvert type concrete products that can be connected in a straight or curved shape - Google Patents

Description

The present invention relates to a joint connection device for a culvert type concrete product that can connect a culvert type concrete product such as a concrete drainage groove linearly or in a curved shape.

  Conventionally, a concrete product in which connecting holes are formed at both end positions in the longitudinal direction of the concrete product is generally known.

  In recent years, in order to reduce the labor force at construction sites, many concrete products have been developed in which a concrete product main body and a lid are combined from a product in which a lid is placed on a U-shaped side groove such as a U-shaped groove.

  The developed concrete product with the lid and the lid is also called a culvert product, and it can save labor for laying the lid at the construction site, but when connecting many products to the product at the construction site, the cement is used as before. The work (joint work) where the mortar was put between the products could not be performed and the countermeasures were difficult.

  This is because underlaying concrete products, such as U-shaped grooves, do not have openings on the upper surface, for example, so that the operator's hands cannot enter from the inside of the product and joint work with cement mortar cannot be performed.

  And in order to cope with such problems, what was prepared as an alternative to mortar joint work when constructing culvert type concrete products is made of urethane having a water-stop function at both longitudinal direction end surfaces of culvert type concrete products. A rubber packing was attached, and two adjacent culvert concrete products to be connected were joined together.

  This is because the rubber packing is compressed and connected at both longitudinal direction end faces of the culvert type concrete product. As a method of connecting with the already constructed culvert type concrete product, the culvert type concrete product to be connected is powered by heavy machinery, or The chain rope is wound around the product, lifted, transported to a predetermined laying position, and gradually pulled by human power with a tightening tool. It takes a lot of work.

  That is, in the construction method, it is extremely difficult to perform the connecting work by compressing the rubber packing, and most of the products to be connected are in contact with the rubber packing attached to the connecting surface which is the end of the existing product. By the way, the drawing work was finished, and there was a possibility that the purpose of preventing water stop using the rubber repulsion effect after the product connection could not be achieved.

  By the way, in recent concrete products, there is a product with a lifting hole in addition to the connecting hole, and this lifting hole function can dramatically shorten the work time at the construction site, and it is extremely excellent in safety. Needless to say, we were able to provide

  However, in recent years, rubber packing has been affixed to a culvert type product, so that time was spent in the rubber packing crimping work in the connection work, and even the work time shortened by the above-mentioned method was wasted, on the contrary. Even work hours could be extended.

  Here, in recent years, a connection structure of concrete products by a pulling structure, which is a novel technology, has been invented (generally referred to as a so-called perfect joint method / PJ method in the industry). Or the following problems also existed about concrete products.

  For example, it is assumed that public construction is ordered by the state and new road construction is performed. At this time, concrete gutters are used for the purpose of draining roads, and on existing roads, concrete products are replaced due to the deterioration of concrete products. However, the current situation is that a curved portion and a straight portion are mixed.

  At this time, in the conventional PJ method, the straight part of the construction road is connected, and the concrete product to be buried is drawn evenly by manual adjustment with the left and right fine adjustments, after the rubber packing is crimped, the connecting plate, bolt The connection work is performed with the water-stopping effect of the concrete product (for example, culvert product).

  However, when the concrete product to be connected at the curve (curved) location on the construction road is drawn evenly while manually adjusting the left and right with the drawing tool, the construction site curves (curved). As a result, various work difficulties occur.

  That is, for the inner part of the curve, the connection work is completed by bringing the end of the concrete product to be connected to the end of the installed product until it comes into contact, but in the outer part of the curve, the inner side of the curve is already installed. Due to the contact state of the end part of the product, it stopped there without proceeding further, so that it could not be pulled further on the outer part of the curve, and an opening was generated at the outer connection part.

Therefore, in order to connect the openings, a method of using a plywood board at the construction site to make a wall and injecting cement mortar and ready-mixed concrete into the wall had to be taken.
JP 2001-329622 A

Thus, the present invention was devised to cope with the above-mentioned conventional problems, and for example, not only the connection of a culvert type concrete product at a straight portion on a construction road, but also the connection at a curved portion is simple and quick. It is another object of the present invention to provide a connecting device for a culvert type concrete product that can be connected in a straight line or curved line.

A culvert type concrete product combined connection device that can be connected in a straight line or curved line according to the present invention,
A culvert type concrete product combined connection device capable of connecting a plurality of culvert type concrete products linearly or curvedly in the longitudinal direction,
A plurality of underdrain concrete products to be connected in the longitudinal direction;
Holes for connection respectively drilled at fixed positions on both side walls on both ends of the culvert type concrete product;
A connection plate constructed over the connection hole;
A fixing rod for erection between adjacent side walls of the culvert type concrete product to which the connection plate is to be connected;
Have
The connection plate is formed in a flat plate rectangular shape and is provided with a vertical notch for bending at a substantially middle portion in the longitudinal direction, and opens at the lower side in the vicinity of one end and extends upward. A step-less mounting locking hole in the shape of a long hole extending in the longitudinal direction in the vicinity of the other side end portion, and the locking cut of the stepless mounting locking hole. A notch-shaped locking groove extending upward from the end of the notch groove side is provided,
The fixing rod has a male screw part and a bolt head provided at the base end of the male screw part, and the male screw disappears from the tip part to a substantially intermediate position to form a round bar-like male screw disappearing part. Being
The connection hole has an anchor portion made of a metal pipe with a female thread portion threaded therein, and has an inner diameter substantially equal to the inner diameter of the female thread portion, fitted into the distal end of the anchor portion, and on the opening side of the distal end Then, it was formed with a hole forming member provided with a synthetic resin hole portion with a protruding protrusion formed in an annular shape toward the center of the hole,
It is characterized by this.

According to the present invention, there is an excellent effect that not only connection of a culvert type concrete product at a straight portion on a construction road but also connection of a culvert type concrete product at a curved portion can be easily, quickly and surely performed. .

Hereinafter, the present invention will be described based on embodiments shown in the drawings.

  FIG. 1 is a plan view showing an embodiment of the present invention. FIG. 1 shows an example in which a plurality of underdrain concrete products 1 are connected with a predetermined curve.

  Here, the underdrain type concrete product 1 shown in FIG. 1 is provided with a rainwater drainage slit 2 communicating with the internal hollow portion 3 (drainage channel) on the upper surface thereof.

  Moreover, the culvert type concrete product 1 is formed in a substantially rectangular parallelepiped shape, as can be understood from FIG. 1, and the connection holes 7, 7 are respectively formed at predetermined positions on the side walls in the vicinity of both end portions thereof. Is provided.

  When the culvert type concrete product 1 is manufactured, the connection hole 7 is preliminarily attached with a member for forming a connection hole in the manufacturing mold, and the member 7 is formed with a strong connection hole 7. For example, in the present invention, a metal pipe having a female screw 8 engraved therein is used as the main member of the connection hole forming member.

  And the position of this connection hole 7 formation must be provided in the same position in the vicinity of the both ends of the longitudinal direction about all the concrete products 1 mass-produced.

  That is, the concrete product 1 provided with the connecting hole 7 for the straight connection, and the concrete product 1 provided with the connecting hole 7 for the curved connection (for example, the position of the hole is closer to the end) They are not manufactured separately. This is because manufacturing such other types of products significantly increases the manufacturing cost.

  Therefore, the connection hole 7 is formed at the same position in the vicinity of both end portions in the longitudinal direction of all the concrete products 1 that are mass-produced, and thus, based on the concrete product 1 that is connected in a straight line. When it is desired to connect the concrete product 1 in a curved shape, the concrete product 1, more precisely, the position of the connection hole 7 is not changed, and other connection members are changed.

  As can be understood from FIG. 2, an airtight member 5 made of rubber packing or the like is attached to the connection end surface 4 of the culvert type concrete product 1. The airtight member 5 made of rubber packing or the like is attached to the portion in a single layer, and the airtight member 5 is attached to the outer portion of the curve in a double or triple manner to cope with the opening generated in the connection portion outside the curve.

  Here, the connection of the culvert type concrete products 1 and 1 at the curved portion will be described.

  First, the culvert type concrete product 1 is laid at a predetermined position. Next, the next culvert type concrete product 1 to be connected with a curve is transported to a predetermined position and temporarily placed so as to be connected with a predetermined curve.

  Thereafter, a connecting plate 9 is installed in the connecting holes 7 and 7 of the adjacent culvert type concrete products 1 and 1 to be connected, and the adjacent culvert type concrete product 1 is used from that state by using a drawing tool (not shown). , 1 is drawn.

  At this time, the connection plate 9 shown in FIG. 3 is used as the connection plate 9. However, when the connection plate 9 is used in a curved portion, the connection plate 9 is provided in the middle in the longitudinal direction in advance. It is assumed that the bent vertical notch 10 is bent at a desired angle.

  Then, pulling from the inner part of the curve and performing the connection work, it is confirmed that the airtight member 5 provided on both connection end faces is sufficiently crimped and both ends are in close contact with each other, and bolt-like fixing The connecting plate 9 is constructed by fitting the flange 11 into the connecting holes 7, 7.

  Thus, the fixing rod 11 may be attached by screwing so that the male screw portion 18 of the fixing rod 11 is screwed into the female screw portion 8 of the connection hole 7 or by driving the bolt head 16 of the fixing rod 11 forcibly. It may be screwed.

  Next, as for the outside of the curved portion, as can be understood from FIG. 5, a large opening is formed between the connection end faces. However, the airtight member 5 is attached to each connection end face in a double or triple manner so as to close the opening, and thus the airtightness of the connection is sufficiently maintained.

  Then, the connection plate 9 is bent at a desired angle, and this is temporarily placed between the fixing rods 11 and 11 temporarily inserted into the adjacent connection holes 7 and 7.

  From this state, the adjacent concrete fence-type concrete products 1 and 1 are sufficiently drawn using a drawing tool, and the fixed rods 11 and 11 are driven or screwed into the connection holes 7 and 7 in a sufficiently drawn state so that both concretes are brought together. The products 1 and 1 are connected.

  It is assumed that concrete mortar 12 is finally placed in the opening to seal the airtight member 5.

  By the way, in order to connect the culvert type concrete products 1 and 1 in a straight line, it is only necessary to draw the left and right uniformly while applying fine adjustment manually using a drawing tool.

  However, when the construction site is a curve (curve), the inside of the curve draws until the connection end surface of the product 1 to be connected to the connection end surface of the laid product 1 comes into contact and pressure contact, and then the connection plate 9 or the like there. The connection work using is performed, and the work inside the curve portion is completed.

  However, since the connection end surfaces of the products 1 and 1 on which the curve inner side has been laid are in a sufficient contact state, the curve outer side cannot be further drawn.

  Therefore, on the outside of the curve, the airtight members 5 and 5 are sufficiently close to each other, but there is a situation in which an opening is generated in the connecting end surface portion of the concrete products 1 and 1. In the present invention, such a situation is sufficiently dealt with as described above.

  Therefore, in the present invention, the connecting plate 9 that can be bent vertically from the middle portion is used.

  In particular, the numerical aperture value of the opening varies depending on the degree of curvature of the curved portion.

  As understood from FIG. 3, a locking notch groove 14 that opens to the lower side and extends upward is provided in the vicinity of one end portion in the longitudinal direction of the connection plate 9.

  In addition, an elongated hole-shaped stepless mounting locking hole 15 extending in the longitudinal direction is formed in the vicinity of the other end portion, and the stepped mounting groove 15 side of the stepless mounting locking hole 15 side is formed. A notch-like locking groove 25 extending upward is provided from the end of the.

  In particular, since the connection plate 9 according to the present invention is provided with a long hole-like stepless attachment locking hole 15, the connection plates 9 are sufficiently adjacent to each other even when the numerical aperture values of the openings are different. It can be installed between the connection holes 7 and 7.

  Next, the bolt-shaped fixing rod 11 will be described. The structure of the fixed rod 11 is shown in FIG.

  That is, the fixing rod 11 has a male screw portion 18 and a bolt head 16 provided at the base end of the male screw portion 18, and the male screw portion 18 has a round bar shape with the male screw disappearing from the distal end portion to a substantially intermediate position. A male screw disappearing portion 17 is formed.

  By using the fixing rod 11 having such a structure, the number of times of screwing at the time of connection can be greatly reduced, or even if the bolt head 17 is driven as it is, it can be brought into a screwed state. Time and effort can be greatly reduced.

By the way, the connecting hole 7 is fitted into the hole forming / anchor portion 19 made of metal pipe having the internal threaded portion 8 threaded therein as described above, and the tip of the hole forming / anchor portion 19, and the female threaded portion 8 is formed by a hole forming member 22 provided with a synthetic resin hole 21 having an inner diameter substantially equal to the inner diameter of 8 and a projecting protrusion 20 formed in an annular shape toward the center of the hole on the tip opening side. .
Here, the hole forming member 22 made of synthetic resin is fitted into the support member mounted on the formwork and the hole forming / anchor portion 19 is mounted when the concrete product 1 is manufactured. It will have a function to prevent it from falling off easily.

  Further, the central crushing portion 23 of the anchor portion 19 fulfills a function of preventing the slipping from preventing the concrete product 1 body from slipping out after the concrete product 1 is manufactured.

  And in the situation of construction site, the fixing rod set in the connection hole 7 formed in the hole forming / anchor part 19 at the time of construction by the hole forming member 22 made of plastic cap attached to the hole forming / anchor part 19 11 has a function to prevent falling off of the fixing rod.

  Also, it has a pop-out prevention function that prevents the fixed hook 11 from being flipped at the moment when human power is applied during the pulling operation.

  Moreover, the fact that the center crushing portion 23 of the hole forming / anchor portion 19 and the hexagonal chamfering thereof are generated when the fixing rod 11 is screwed (when tightening or removing) at the construction site, and also has a detent function. Because.

Further, the plastic cap 24 at the rear of the hole forming / anchor portion 19 has a role of preventing the concrete trowel from entering during the production of the concrete product 1 and increases the adhesion area between the hole forming / anchor portion 19 and the concrete. A stopper-type plastic cap 24 was attached.

It is composition explanatory drawing explaining the structure which connected the concrete product in the curve shape with the connection apparatus of this invention.

It is composition explanatory drawing explaining the structure of the concrete product connection end surface by this invention.

It is explanatory drawing explaining the structure of a connection board.

It is explanatory drawing (the 1) explaining the structure of a fixed rod.

It is explanatory drawing (the 1) explaining the connection state by this invention.

It is explanatory drawing (the 2) explaining the connection state by this invention.

It is explanatory drawing explaining the screwing state of the hole for a connection, and a fixing rod.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Underdrain concrete product 2 Rainwater drain slit 3 Internal hollow part 4 Connection end surface 5 Airtight member
7 Connection hole 8 Female thread 9 Connection plate 10 Vertical notch for bending 11 Fixing rod
12 Concrete Mortar 13 Lower Side 14 Locking Notch Groove 15 Stepless Mounting Locking Hole 16 Bolt Head 17 Screw Disappearing Portion 18 Male Screw Portion
19 Anchor part 20 Protrusion 21 Synthetic resin hole part 22 Hole formation member 23 Center crushing part 24 Locking groove

Claims (1)

A culvert type concrete product combined connection device capable of connecting a plurality of culvert type concrete products linearly or curvedly in the longitudinal direction,
A plurality of underdrain concrete products to be connected in the longitudinal direction;
Holes for connection respectively drilled at fixed positions on both side walls on both ends of the culvert type concrete product;
A connection plate constructed over the connection hole;
A fixing rod for erection between adjacent side walls of the culvert type concrete product to which the connection plate is to be connected;
Have
The connection plate is formed in a flat plate rectangular shape and is provided with a vertical notch for bending at a substantially middle portion in the longitudinal direction, and opens at the lower side in the vicinity of one end and extends upward. A step-less mounting locking hole in the shape of a long hole extending in the longitudinal direction in the vicinity of the other side end portion, and the locking cut of the stepless mounting locking hole. A notch-shaped locking groove extending upward from the end of the notch groove side is provided,
The fixing rod has a male screw part and a bolt head provided at the base end of the male screw part, and the male screw disappears from the tip part to a substantially intermediate position to form a round bar-like male screw disappearing part. Being
The connection hole has an anchor portion made of a metal pipe with a female thread portion threaded therein, and has an inner diameter substantially equal to the inner diameter of the female thread portion, fitted into the distal end of the anchor portion, and on the opening side of the distal end Then, it was formed with a hole forming member provided with a synthetic resin hole portion with a protruding protrusion formed in an annular shape toward the center of the hole,
A connecting device for culvert type concrete products that can be connected linearly or curvedly.

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