JP3384449B2 - Joint structure in concrete products - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a U-shaped groove block for constructing a gutter, a box-shaped block for constructing a buried box provided at an important point of underground wiring, and a concrete block such as a lining block for covering the ground. The present invention relates to a joint structure in a concrete product that joins together.

[0002]

2. Description of the Related Art A conventional joint structure for concrete products will be described with reference to FIG. 1. As shown in FIG. 1A, a tubular anchor 3 having an insertion hole 2 having a small diameter portion 4 is embedded in one block 1 as shown in FIG. The lower half of the coupling sleeve 5 is inserted into the insertion hole 2 and the upper half is projected.

As shown in FIG. 1B, the sleeve 5
The lower half of the anchor pin 6 having the large diameter head 7 is inserted therein, and the upper half of the pin 6 is projected.

A cylindrical anchor 3'having an insertion hole 2'having a small diameter portion 4'is embedded in the other block 1 ', and an anchor pin 6 projecting from the one block 1 is inserted into the insertion hole 2'. While press-fitting the upper half head portion 7 of the anchor pin 6 into the upper half portion of the coupling sleeve 5,
The head 7 and the sleeve of the pin are press-fitted into the insertion hole 2 ', and the lower half of the pin 6 is press-fitted into the lower half of the coupling sleeve 5.

Then, as shown in FIG. 1C, one end of the coupling sleeve 5 is expanded by the large-diameter head portion 7 of the anchor pin 6 to engage with the small-diameter portion 4 ', and the lower half of the anchor pin is formed. At the section, the other end of the tube is expanded and engaged with the small diameter section 4 to join the two blocks 1, 1 '.

[0006]

However, in the above-mentioned joining structure, the number of members is large and the structure is complicated, and the joining work also requires time and labor, resulting in an increase in cost.

[0007]

SUMMARY OF THE INVENTION Therefore, according to the present invention, as a means for appropriately solving the above problems of the joint structure in the conventional concrete product, an insert cylinder for forming a mortise hole is embedded in one block and the insert cylinder is embedded. The cylinder has a locking spring capable of elastically displacing in the radial direction of the mortise in the mortise, and a tenon member having a locking portion is projectingly provided on the other block, and the mortise member is inserted into the mortise. By
The locking portion is elastically engaged with the locking spring to prevent coming off.

The locking spring has a plurality of spring pieces extending into the mortise, the inner end of each spring piece is connected to the inner end ring, and the outer end is connected to the outer end ring. The spring piece is bent inward in the radial direction between the inner end ring and the outer end ring to form an elastic locking portion, and the elastic locking portion is engaged with the locking portion.

As another example of the joining structure of the present invention, a cylindrical locking spring for forming a mortise is embedded in one of the blocks, and the locking spring has a plurality of spring pieces extending in the mortise. The inner end of each spring piece is connected to the inner end ring,
The outer end is connected to the outer end ring, and the spring piece is bent inward in the radial direction between the inner end ring and the outer end ring to form an elastic locking portion, and the locking portion is secured to the other block. By projecting a tenon member having a mortise member and inserting the tenon member into the tenon hole, the locking portion is elastically engaged with the elastic locking portion to prevent coming off and join the both blocks. The configuration.

With the above structure, the number of members can be reduced and the structure can be simplified. Further, the joining work is facilitated, the working time is shortened, and the cost can be reduced.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of the present invention will be described with reference to FIGS.

Reference numerals 1 and 1'in the figure respectively denote concrete blocks to be joined. The concrete blocks are U-shaped groove blocks for constructing a gutter, a box-shaped block for constructing an underground box, and a ground cover. Includes lining blocks to be worked.

First embodiment (see FIGS. 2 to 5)

As an example of the joint structure in the concrete product of the present invention, its construction will be described with reference to FIG. 2. An insert cylinder 9 for forming a mortise hole 8 is buried in one of the concrete blocks 1 to be joined.

The insert cylinder 9 is a bottomed cylinder having an opening, and a flange 9a projecting around the bottom wall at the inner end thereof.
Is provided, the opening is embedded so as to be formed on the same surface as the surface of the block 1, and the flange 9a is embedded in the base material of the block 1 to firmly fix the insert cylinder 9 in the block 1. Therefore, the mortise 8 is inserted in the insert cylinder 9.
Define.

The insert cylinder 9 is placed in the mortise hole 8,
A holding spring 10 is provided which is elastically displaceable in the radial direction of the mortise 8.

The locking spring 10 has a plurality of spring pieces 10a extending into the mortise 8, as shown in FIG.
The inner ends of the spring pieces 10a are connected to the inner end ring 11 and the outer ends of the spring pieces 10a are connected to the outer end ring 12.
a is between the inner end ring 11 and the outer end ring 12,
The elastic locking portion 10b is bent inward in the radial direction of the mortise 8.
And a small diameter portion 8a is formed in the mortise 8 by the elastic locking portion 10b.

On the other hand, a tenon member 13 having a locking portion 13a is projected on the block 1 ', the tenon member 13 is inserted into the tenon hole 8 and the head 14 of the tenon member 13 causes the spring piece 10a. Of the small diameter portion 8 by pressing the elastic locking portion 10b of the above and elastically displacing the elastic locking portion 10b outward in the radial direction.
Expand a and press the upper half of the tenon member 13 into the tenon hole 8. Then, due to the restoring force of the spring piece 10a,
The locking portion 13a is replaced with the elastic locking portion 10 of the locking spring 10.
The above blocks 1 and 1'are joined by elastically engaging with b to prevent them from coming off.

In the locking spring 10 shown in FIG. 2, the head 14 of the tenon member 13 forcibly applies a pull-out force to displace the spring piece 10a outwardly to expand the small diameter portion 8a. As a result, the tenon member 13 can be pulled out from the tenon hole 8.

A tenon member 13 projecting from the block 1 '.
2 and FIGS. 5B and 5C, the locking portion 13a is formed of a headed pin having the large-diameter head portion 14, and the head portion 14 serves as the locking portion 13a.

As a concrete example of the headed pin, as shown in FIGS. 5B and 5C, the head portion 14 of the tenon member 13 is formed in a cone shape or a frustum shape, and when it is inserted into the tenon hole 8, the elastic member is engaged. The elastic locking portion 10b is smoothly expanded while sliding the stopper 10b along the slope of the head 14, and the head 14 is elastically locked after the head 14 crosses the small diameter portion 8a. Part 10
It is configured so that it can be easily inserted into the mortise 8 by engaging with b and is hard to come out.

Alternatively, as shown in FIG. 2, the above-mentioned tenon member 13
Head 14 is formed in the shape of an inverted cone, and the head 14 is fixed to the locking portion 13a.
As the tenon member 13 while engaging with the elastic locking portion 10b.
The small diameter portion 8a, that is, the elastic locking portion 10 while sliding the elastic locking portion 10b along the inclined surface of the head portion 14 when removing the
The tenon member 13 is configured so that b can be spread smoothly.
The mortise 8 can be pulled out.

Alternatively, as shown in FIG. 5A, the above-mentioned tenon member 1
3 is formed by a pin having a diameter larger than the small diameter portion 8a of the mortise 8, and a peripheral groove 15 is provided on the peripheral surface of the tip portion of the pin.
5, the engaging portion 13a is formed, and the circumferential groove 15 and the elastic engaging portion 10b are engaged with each other.

The pins forming the tenon member 13 are shown in FIG.
As shown in A, the lower half portion of the block 1'is directly driven or fixed by insert molding.

Alternatively, as shown in FIG. 5B, a mounting hole 18 is preformed in the block 1 ′, and the anchor 1 is inserted in the mounting hole 18.
6 is driven, the connecting pin 17 forming the tenon member 13 is driven into the anchor 16, the tip of the anchor 16 is expanded and bited into the peripheral wall of the mounting hole 18, and the tenon member 13 is firmly fixed to the block 1 '. To do.

Alternatively, as shown in FIG. 5C, the anchor pin is used as the tenon member 13, and the anchor 16 is driven into the mounting cylinder 19 previously embedded in the block 1 ′ and press-fitted into the anchor 16. Drive the connecting pin 17,
The tip end of the anchor 16 is expanded and bited into the peripheral wall of the mounting cylinder 19, and the tenon member 13 is firmly fixed to the block 1 '.

FIG. 3 shows a concrete example of the joint structure of the present invention.
The joint structure in the concrete U-shaped groove block 20 and the concrete lid block 21 which build a side groove is shown. On the upper end surface of the U-shaped groove block 20, a headed pin forming the tenon member 13 shown in FIG.
An insert cylinder 9 and a locking spring 10 that form a mortise hole 8 in
Embedded, insert the tenon member 13 into the tenon 8,
The tenon member 13 is engaged with the locking spring 10 to join the U-shaped groove block 20 and the lid block 21.

FIG. 4 shows a joint structure between blocks 22 forming an underground burial box, and a headed pin forming the tenon member 13 shown in FIG. In the other box-shaped block or lid block 22, an insert cylinder 9 forming a mortise hole 8 and a locking spring 10 are embedded, and the mortise member 13 is inserted into the mortise hole 8 to engage the mortise member 13. The blocks 22 are joined to each other by engaging with the stop spring 10.

According to the above-described joining structure, the number of members is small, the joining structure is simplified, and the intended joining purpose can be achieved by using an inexpensive joining tool. Also, the joining work can be performed quickly only by pressing the tenon member 13 into the tenon hole 8.
Work time can be shortened and cost can be reduced.

[0030] Second embodiment example (see FIGS. 6, 5, 5, and 4)

As shown in FIG. 6, a hole 23 is formed in one of the blocks 1 to be joined, and a cylindrical locking spring 10 forming a mortise hole 8 is embedded in the hole 23. The stop spring 10 includes a plurality of spring pieces 10 a extending in the mortise 8.
And each of the spring pieces 10a has an inner end connected to the inner end ring 11 and an outer end connected to the outer end ring 12, and the spring pieces 10a are connected to the inner end ring 11 and the outer end ring 12. In the meantime, the elastic locking portion 10b is formed by bending inward in the radial direction of the mortise 8, and the elastic locking portion 10b forms the small diameter portion 8a in the mortise 8.

On the other hand, a tenon member 13 having a locking portion 13a is projected on the block 1 ', the tenon member 13 is inserted into the tenon hole 8, and the head of the tenon member 13 causes the spring piece 10a to move. By pressing the elastic locking portion 10b, the elastic locking portion 10b
b is elastically displaced outward in the radial direction to expand the small diameter portion 8a, and the upper half of the tenon member 13 is press-fitted into the tenon hole 8. Then, due to the restoring force of the spring piece 10a, the locking portion 13a is elastically engaged with the elastic locking portion 10b to prevent it from coming off, and the two blocks 1, 1'are joined together.

In the locking spring 10 shown in FIG. 6, the head 14 of the tenon member 13 is forcibly applied with a pulling force to displace the spring piece 10a outward to expand the small diameter portion 8a. As a result, the tenon member 13 can be pulled out from the tenon hole 8.

On the other hand, the tenon member 13 projecting from the block 1 '.
6 and 5B, C, the locking portion 13a is formed of a headed pin having the large-diameter head portion 14, and the head portion 14 serves as the locking portion 13a.

As a concrete example of the headed pin, as shown in FIGS. 5B and 5C, the head portion 14 of the tenon member 13 is formed in a cone shape or a frustum shape, and when it is inserted into the tenon hole 8, the elastic member is engaged. The elastic locking portion 10b is smoothly expanded while sliding the stopper 10b along the slope of the head 14, and the head 14 is elastically locked after the head 14 crosses the small diameter portion 8a. Part 10
It is configured so that it can be easily inserted into the mortise 8 by engaging with b and is hard to come out.

Or, as shown in FIG. 6, the above-mentioned tenon member 13
Head 14 is formed in the shape of an inverted cone, and the head 14 is fixed to the locking portion 13a.
As the tenon member 13 while engaging with the elastic locking portion 10b.
The small diameter portion 8a, that is, the elastic locking portion 10 while sliding the elastic locking portion 10b along the inclined surface of the head portion 14 when removing the
The tenon member 13 is configured so that b can be spread smoothly.
The mortise 8 can be pulled out.

Alternatively, as shown in FIG. 5A, the above-mentioned tenon member 1
3 is formed by a pin having a diameter larger than the small diameter portion 8a of the mortise 8, and a peripheral groove 15 is provided on the peripheral surface of the tip portion of the pin.
5, the engaging portion 13a is formed, and the circumferential groove 15 and the elastic engaging portion 10b are engaged with each other.

The pins forming the tenon member 13 are shown in FIG.
As shown in A, the lower half portion of the block 1'is directly driven or fixed by insert molding.

Alternatively, as shown in FIG. 5B, a mounting hole 18 is preformed in the block 1 ′, and the anchor 1 is inserted in the mounting hole 18.
6 is driven, the connecting pin 17 forming the tenon member 13 is driven into the anchor 16, the tip of the anchor 16 is expanded and bited into the peripheral wall of the mounting hole 18, and the tenon member 13 is firmly fixed to the block 1 '. To do.

Alternatively, as shown in FIG. 5C, the anchor pin is used as the tenon member 13, and the anchor 16 is driven into the mounting cylinder 19 previously embedded in the block 1 ′ to press it into the anchor 16. Drive the connecting pin 17,
The tip end of the anchor 16 is expanded and bited into the peripheral wall of the mounting cylinder 19, and the tenon member 13 is firmly fixed to the block 1 '.

As a concrete example of the joint structure in this embodiment, a concrete U-shaped groove block 20 for constructing a side groove is provided.
In the joint structure of the concrete-made lid block 21 and the concrete lid block 21, a headed pin forming the tenon member 13 shown in FIG.
A locking spring 10 for forming a mortise hole 8 is embedded in the mortise member 8, and the mortise member 13 is inserted into the mortise hole 8 to form the mortise member 13.
The head 14 is engaged with the locking spring 10 to join the U-shaped groove block 20 and the lid block 21.

Block 2 for forming an underground buried box
In the two-joint structure, a headed pin forming the tenon member 13 shown in FIG. 6 is provided on the upper end surface of one box-shaped block 22, and the other box-shaped block or lid block 22 has a mortise hole. The insert cylinder 9 forming 8 and the locking spring 10 are embedded, the tenon member 13 is inserted into the tenon hole 8, and the tenon member 13 is engaged with the locking spring 10 to join the blocks 22 to each other.

According to the above joining structure, the number of members is small, the joining structure is simplified, and the intended joining purpose can be achieved by using an inexpensive joining tool. Also, the joining work can be performed quickly only by pressing the tenon member 13 into the tenon hole 8.
Work time can be shortened and cost can be reduced.

[0044]

According to the joining structure of the concrete product of the present invention, the number of members can be reduced to simplify the joining structure, and the desired joining purpose can be achieved by using an inexpensive joining tool. Further, the joining work can be easily performed only by press-fitting the tenon member into the tenon, and the working time can be shortened and the cost can be reduced.

[Brief description of drawings]

1A to 1C are cross-sectional views showing a joint structure in a conventional concrete product.

FIG. 2A is a cross-sectional view showing a state before joining of an example of a joining structure in a concrete product of the present invention, and B is a state after joining.

FIG. 3 is a cross-sectional view showing an example in which a side groove is constructed by the joining structure shown in FIG.

FIG. 4 is a cross-sectional view showing an example in which an underground buried box is constructed by the joining structure shown in FIG.

5A to 5C are cross-sectional views each showing a specific example of a pin forming a tenon member.

FIG. 6A is a sectional view showing a state before joining of another example of the joining structure of the present invention, and B is a sectional view showing a state after joining.

[Explanation of symbols]

1,1 'block 8 mortise 8a small diameter part 9 Insert tube 9a flange 10 Locking spring 10a spring piece 10b Elastic locking part 11 Inner end ring 12 Outer ring 13 Mortise material 13a locking part 14 head 15 circumferential groove 16 anchor 17 coupling pin 18 mounting holes 19 mounting tube 20 U-shaped groove block 21 lid block 22 Box block or lid block 23 holes

Front page continued (58) Fields surveyed (Int.Cl. ⁷ , DB name) E03F 5/04 E03F 3/04 E04B 1/41 E04B 1/48

Claims (2)

(57) [Claims] 1. A joint structure in a concrete product for joining concrete blocks to each other, wherein an insert cylinder for forming a mortise is embedded in one of the blocks, and the insert cylinder has a cylindrical locking spring in the mortise. The tubular locking spring has a plurality of spring pieces that extend in the mortise and can be elastically displaced in the radial direction of the mortise, and the inner ends of the spring pieces are connected to the inner end ring. The outer end is connected to the outer end ring, and each spring piece is bent inward in the radial direction between the inner end ring and the outer end ring to form an elastic locking portion. By projecting a tenon member having a locking portion and inserting the tenon member into the tenon hole, the locking portion is elastically engaged with the elastic locking portion to prevent the block from coming off. Connection in concrete products characterized by joining Structure. 2. A joint structure in a concrete product for joining concrete blocks to each other, wherein a cylindrical locking spring forming a mortise hole is embedded in one block, and the locking spring extends in the mortise hole. Between the inner end ring and the outer end ring, the inner end of each spring piece is connected to the inner end ring, and the outer end is connected to the outer end ring. In the radial direction to form an elastic locking portion, the other block is provided with a tenon member having a locking portion, and the tenon member is inserted into the tenon hole to lock the tenon member. A joint structure in a concrete product, characterized in that the both portions are joined by elastically engaging the elastically engaging portion with the elastic locking portion to prevent the portion from coming off.