JPH01239238A - Joint for concrete product and its mounting structure - Google Patents

Abstract

PURPOSE:To provide possibility of coupling in curved form and prevent slipoff of the joint under works by furnishing the joint body with a slipoff preventive part protruding sideways, and by forming a recess in the sides and a fitting boss in the form of an arc of circle at both ends fore and aft. CONSTITUTION:Protruding sideways, slipoff preventive parts 5, 5 having resilience are provided at the body of a joint 2 to prevent the joint 2 from slipping off from locating holes 8, 8 in concrete products 6, 6a during coupling works. Recesses 4, 4 are formed at the sides of the joint 2 body, while fitting bosses 3, 3 in the form of an arc of circle are formed in the left-and-right direction at the ends fore and aft. When the joint 2 is fitted in the locating holes 8, 8, it is made possible to move sideways while dislocation in the vertical direction is suppressed. This permits coupling of the concrete products 6, 6a equipped with an angle.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a joint for concrete products and its mounting structure.

[Prior Art] Conventionally, as shown in FIG. 11, there is a joint 31 for a side gutter that has a pin shape whose diameter decreases toward both ends. A positioning hole 32 is formed in the joint surface 7 so as to correspond to the shape of one side of the joint 31 and whose diameter is reduced toward the back.

To use the joint 31, first insert the joint 31 into the positioning hole 32 of the negative side groove 6a, and then fit the positioning hole 32 of the other side groove 6b into one side of the joint 31 protruding from the joint surface 7. It is joined to the side groove 6a while adjusting its position so that it is inserted into the side groove 6a. This results in
Both side grooves 6a, 6b are positioned without shifting.

[Problem to be Solved by the Invention] However, since the joint 31 is simply inserted into the positioning hole 32, it falls off from the positioning hole 32 while the other side W46b is being fitted, and the work must be repeated. There was something I had to do.

In addition, when forming a straight water channel with side ditches, the joint surfaces 7 of the side ditches 6a and 6b are arranged so that they are completely joined to each other, but when forming a curved waterway, In this case, it is necessary to make an angle between the side gutters 6a and 6b in the left-right direction. In this case, one side of the joint surface 7 will be in a separated state, but the sealant present on the joint surface can function as a waterway. However, since the joint 31 is fitted into the positioning hole 32 with no play, when an attempt is made to angle the grooves 5a and 5b on both sides as shown in FIG. Both side grooves 6a are in a tensioned state inside.

6b is prevented from forming any further angle. Therefore, when this joint 31 was used, it was almost impossible to form a curved waterway.

A first object of the present invention is to provide a joint for concrete products that does not have the risk of falling off when inserted into a positioning hole of the product.

A second object of the present invention is to provide a structure for attaching joints for concrete products that can be used even when the products are at an angle.

[Means for Solving the Problems] That is, the joint for concrete products according to the first aspect is provided with an elastic retaining portion projecting laterally on the joint body.

In addition, the joint for concrete products according to claim 2 has a recess formed on the side surface of the joint body, and a recess is provided in the recess so as to protrude obliquely to the outside of the recess in a direction opposite to the insertion direction of the joint. The stop portion is integrally formed.

Furthermore, the mounting structure of the joint for concrete products according to claim 3 is such that the joint has fitting convex portions formed in an arc shape in the left and right directions at both front and rear ends, and is fitted into a positioning hole formed in the concrete product. It is a thing,
The positioning hole is expanded to provide a space for allowing the joint to move laterally.

[Function] Due to its elasticity, the retaining portion presses against the inner surface of the positioning hole and prevents the joint from coming off from the circumferential hole.

In handling, the stop portion presses against the inner surface of the positioning hole due to its elasticity, and bends and enters the groove with its tip facing toward the exit side of the positioning hole.

When a force is exerted on the joint to cause it to separate from the positioning hole, the retaining portion stretches against the inner surface and prevents the joint from separating from the circumferential hole.

The expanded space allows the joint to move within the positioning hole. Even in this case, since the fitting convex portion of the joint fits into the positioning hole, displacement in the left and right direction is prevented. On the other hand, both the upper and lower side surfaces are always in contact with the inner surface of the positioning hole to prevent vertical displacement between the joint and the positioning hole.

[Example] Hereinafter, a first example in which the present invention is embodied in a concrete gutter joint will be described with reference to FIGS. 1 to 8.

As shown in FIGS. 1 and 3, the joint 1 is made of rigid resin, and its main body 2 is rod-shaped. Both front and rear ends are tapered in diameter, and both upper and lower side surfaces 2a are flat. Both end portions form a circular arc shape in the left-right direction, and serve as fitting convex portions 3, respectively.

A pair of grooves 4 are formed in the left and right directions on the lower surface 2a of the main body, and tongue pieces are provided in both grooves 4 so as to face each other and project downward from the grooves 4. The retaining portions 5 each having a shape are integrally formed. Both retaining parts 5 are thin and have elasticity, and their tips touch the lower surface 2a.
It protrudes further downward.

The joint 1 of this embodiment is a concrete side gutter 6a,
6t), and positions the both side grooves 5a, 5b by fitting into the positioning hole 8 formed in the joint surface 7 of the both side grooves 6a, 6b.

Next, a mold 9 for forming the positioning hole 8 for the joint 1 will be explained.

As shown in Figures 6 to 8, the mold 9 has a shape corresponding to half of one side of the joint 1, and the left and right width of the mold 9 is compared to the left and right width of the joint 1 shown by the two-dot chain line in Figure 7. do,
It is wide except for the tip. A fixing portion 10 having a square cross section is integrally formed at the base end of the mold 9, and a female thread 11 is formed on the base end surface 10a.

The mold 9 described above is fitted into a rectangular fixing recess 13 formed in a mold 12 for forming the side grooves 6a and 6b, so as not to be movable in the vertical and horizontal directions. Fixed by The aforementioned fixing part 10
Although the space on the base end surface 10a of the mold 9 is narrow and limited, as mentioned above, the mold 9 of this embodiment requires only one fixing bolt 14, so a large bolt can be used to securely fasten the mold 9. can be fixed.

As shown in FIGS. 1 to 3, a positioning hole 8 having a shape corresponding to the mold 9 is formed in the joint surface 7 of the side grooves 6a, 6b formed by the mold 12 having such a configuration, and a circumferential hole 8
A fitting recess 15 is located at the back of the fitting recess 15 .

Next, a case where the side grooves 6a and 6b are joined by the joint 1 will be explained.

First, as shown in Fig. 1.2, one side groove 6a is installed at a predetermined position, and the retaining part 5 is lowered into the two positioning holes 8 formed on the left and right sides of the joint surface 7. Insert each joint 1 with the side facing up. The 10,000 retaining portions 5 of both joints 1 press against the inner surface of each positioning hole 8 due to their elasticity, and bend and enter into the groove 4 with their tips facing the exit side of the positioning hole 8. .

Even if a force is applied to these joints 1 to cause them to separate from the positioning holes 8, the retaining portions 5 hold against the inner surface, so that these joints 1 do not easily separate from the positioning holes 8.

On the other hand, the fitting protrusions 3 at the tips of both joints 1 fit into the fitting recesses 15 of the respective positioning holes 8, and both upper and lower side surfaces 2a of the joint 1 abut against the inner surfaces of the positioning holes 8, and both left and right sides 2b forms a space 16 between it and the inner surface of the positioning hole 8 except for the fitting protrusion 3.

Next, as shown in FIG. 3, the other side groove 6b is positioned so that the pair of positioning holes 8 of the other side groove 6b fit into both joints 1 protruding from the joint surface 7 of the other side groove 6a. It is joined to the side groove 6a while adjusting. Then, the fitting protrusions 3 on the other side of both joints 1 fit into the fitting recesses 15 of the respective positioning holes 8, and similarly to the other side grooves 6a, the upper and lower sides 2a of both joints 1 are respectively The left and right side surfaces 2b form a space 16 with the inner surface of the positioning hole 8 except for the fitting convex portion 3.

When forming a curved waterway, as shown in FIG. 5, the side gutters 6a and 6b are made to form an angle in the left-right direction from the above-mentioned state. Then, both joints 1 are also angled with respect to the positioning hole 8, but as mentioned above,
Since the spaces 16 are formed on both the left and right sides of the joint 1, the inner surface of the positioning hole 8 does not come into contact with the joint 1 and prevent its inclination. Therefore, both side grooves 6a, 6
Any angle can be attached to b.

Moreover, as shown in FIG.
The fitting convex portions 3 of the joint 1 on the side separated from each other separate from the fitting recess 15 of the positioning hole 8 and cease to perform its positioning function. However, the fitting protrusion 3 of the other joint 1
and the fitting recess 15 are fitted, so both grooves 5a, 5
b can still be positioned laterally. On the other hand, even in this state, both the upper and lower side surfaces 2a of both joints 1 are in contact with the inner surface of the positioning hole 8, so that the vertical positioning of both side grooves 6a, 6t) is achieved.

Next, this invention will be applied to another concrete gutter joint 2.
A second embodiment of the present invention will be described with reference to FIGS. 9 and 10.

The main body 22 of the joint 21 is disk-shaped, and its upper surface is inclined downwardly toward the insertion direction. A pair of grooves 4 and a retaining portion 5 are formed on the lower surface of the main body 22, similar to the joint 1 of the first embodiment.

On the other hand, the positioning hole 23 that is the object of the joint 21 on the main flow side has a shape that approximately corresponds to the outer shape of this joint 21. The joint 21 of this embodiment also prevents displacement in the vertical and horizontal directions, and the stopper 5 prevents the joint from falling off.

In addition, in the above-mentioned first and second embodiments, the joint 1°21 was used to connect concrete side gutters, but the joint of the present invention can be applied to various concrete products, such as concrete waterways. It may also be embodied as a joint for connecting blocks, blocks, etc.

Also, the joints 1 and 2 of the above-mentioned first and second embodiments
10, each pair of retaining portions 5 were provided, but it is also possible to use only one pair of retaining portions 5, and these retaining portions 5 may be provided in a direction opposite to the insertion direction of the joint 1.21. may be in pressure contact with the inner surface of the positioning hole 8.23 to prevent it from falling off; for example, it may be placed upright against the side surface of the joint 1°21.Furthermore,
The joints 1 and 21 of the above-mentioned first and second embodiments are as follows:
Positioning holes 8, 2 with the retaining part 5 facing downward
3, but this may be done with the stopper portion 5 facing upward.

[Effects of the Invention] As described above in detail, the joint for concrete products of the present invention provides an excellent effect in that there is no risk of falling off when inserted into the positioning hole of the product.

Additionally, the mounting structure of the joint for concrete products of the present invention provides an excellent effect in that it can be used even when the products are angled with respect to each other.

[Brief explanation of the drawing]

1 to 8 show a first embodiment embodying the present invention, FIG. 1 is a sectional view showing a joint inserted into a positioning hole, FIG. 2 is a front view showing a joint surface of a side gutter, and FIG. Figure 3 is a bottom view showing the grooves on both sides connected by a joint.
Figure 4 is a bottom view showing the state in which they are connected at an angle, Figure 5 is a partial cross-sectional view showing each joint when the grooves on both sides are angled, and Figure 6 is a diagram showing the relationship between the formwork and the mold. 7 is a plan sectional view, FIG. 8 is a side view of the mold, FIG. 9 is a sectional view showing the joint of the second embodiment inserted into the positioning hole, and FIG. 10 is a sectional view showing the relationship. Bottom view showing the state in which the grooves on both sides are connected by a joint, 1st
FIG. 1 is a cross-sectional view showing a conventional joint inserted into a positioning hole, and FIG. 12 is a cross-sectional view showing a joint in which the grooves on both sides are angled. 1 and 21 are joints, 2 and 22 are main bodies, 3 is a fitting projection, 4 is a groove as a recess, 5 is a retaining portion, 8 is a positioning hole, and 16 is a space. Patent Applicant Masami Hospital Figure 3 Figure 4 Figure 1 Figure 9 Figure 1O

Claims (1)

[Scope of Claims] 1. A joint for concrete products in which a joint body (2, 22) is provided with an elastic retaining portion (5) that protrudes laterally. 2. A recess (4) is formed on the side surface of the joint body (2, 22), and a recess (4) is formed in the recess (4) in the opposite direction to the insertion direction of the joint (1, 21) and outside the recess (4). A joint for concrete products that is integrally formed with a retaining part (5) that projects diagonally in the direction. 3. The joint (1), which has fitting protrusions (3) formed in the left and right directions at both front and rear ends, is fitted into a positioning hole (8) formed in a concrete product. The positioning hole (8) is expanded to provide a space (16) to allow the joint (1) to move in the lateral direction.A joint for concrete products.