JP2581162Y2 - Tie - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application field] The present invention relates to a tie, and is mainly used for tightly connecting concrete products such as U-shaped grooves and box culverts.

[Prior art] Bolt insertion holes 21 and 22 for connecting concrete products to public utility sho 60-6003, metal plate 20, bolts
17, 18 and washers 15, 23 are shown. A bolt insertion hole 24 is eccentrically formed in the washer 23, and a taper is formed on the outer peripheral surface of the washer 23.A part of the taper is inserted into the bolt insertion hole 22 to prevent the metal plate 20 from shifting and the bolt 18 from loosening. ing.

[Problem to be solved by the invention] Since both the washer 23 and the bolt insertion hole 22 are perfect circles, the bolt 18
Tightening force from the entire circumference of the taper surface of washer 23
It is evenly transmitted to 22 holes. No force acts to move the metal plate 20 in a direction parallel to the plate surface. That is, no binding action is performed.

[Means for Solving the Problems] The tying tool is composed of a tying bolt and a tying plate.

A frustoconical portion is provided between the shaft portion and the head portion of the fastening bolt, and the frustoconical portion has a larger diameter on the head side.

The truncated cone portion may be provided by rotatably fitting a truncated cone-shaped piece having a shaft hole to the shaft portion of the bolt.

In addition, the binding plate has a connecting means for connecting the other product at the other end while maintaining a size substantially matching the dimension between the inserts buried near the connection portion of the product to be fastened to each other,
At one end, a truncated cone of the fastening bolt for one product can be fitted and has an insertion hole elongated in the direction of the connecting means. This connecting means may be a bolt and its insertion hole, or may be a pin integrally projecting from the plate. The other end of the product is provided with an insert for engaging these bolts and pins.

When the other end of the fastening plate is connected to the other of the products and the fastening bolt is screwed into one of the products through the insertion hole at one end, the insertion hole and the truncated cone are engaged and displaced from each other. Tie products together.

The insertion hole of the binding plate has a large-diameter oval shape on the connecting means side and one end side is smaller than the head side of the frustoconical portion of the binding bolt.

A substantially same gradient as the conical surface is formed in an engagement portion of the insertion hole of the binding plate with the truncated cone portion. The engaging surface of this insertion hole may be formed on the binding plate itself,
Alternatively, it may be formed on the ground attached to this plate, or may be formed over both the plate and the ground.

[Operation] The other end of the fastening plate is connected to the other of the concrete products that are mutually fastened, the fastening bolt insertion hole at one end is aligned with one insert of the product, and the fastening bolt is screwed into the insert through the insertion hole. Eventually, when the truncated cone enters the bolt insertion hole, the outer surface thereof comes into contact with the hole edge of the bolt insertion hole or the peripheral wall surface. When the bolt is further screwed in, the radial cross section of the contact with the plate becomes larger in diameter, so that the bolt and the plate repel each other, so that the concrete products are close to each other and are closely connected.

When the truncated cone portion is rotatably fitted with a truncated cone-shaped piece having a shaft hole in the shaft portion of the bolt, the screwing operation of the bolt is facilitated.

If the insertion hole of the tightening bolt is shaped like an oval with a larger diameter at the other end and smaller at the one end than the head of the truncated cone, the radial displacement of the truncated cone by the truncated cone is possible. The amount of movement of the plate with respect to the amount,
It can take a great deal.

If the slope of the conical surface of the frusto-conical portion of the tightening bolt is formed at the portion where the insertion hole of the tightening plate engages with the frusto-conical portion, the tightening operation can be performed more smoothly.

Embodiment In the following description, the same reference numerals indicate the same or corresponding parts.

Reference numeral 1 denotes a binding device, which comprises a binding bolt 2 and a binding plate 3.

A frustoconical portion 23 between the shaft portion 21 and the head portion 22 of the fastening bolt 2
Is provided. The truncated cone 23 has a larger diameter on the head 22 side.

The binding plate 3 is a product to be tied to each other at the other end.
It has a connecting means 31 with the other 11 of 10 and 11, and has an insertion hole 32 at one end into which the frustoconical portion 23 of the fastening bolt 2 for one of the products 10 can be fitted.

The case where the concrete products 10 and 11 are tightly connected will be described with reference to FIGS.

Inserts 12 and 13 are embedded near the connection of products 10 and 11, respectively. The insertion holes 32 of the plate 3 and the through holes 31 a forming an example of the connecting means 31 are respectively inserted into the inserts 12.
And 13 to match the opening. A normal bolt 31b, which also constitutes an example of the connecting means 31, is inserted through the washer 31c and the through hole 31a, screwed into the insert 13, and the plate 3 is tightened.

Next, the fastening bolt 2 is inserted into the washer 14 and the insertion hole 32 and screwed into the insert 12. As the screw is screwed, the truncated conical portion 23 engages with the edge or the peripheral wall surface of the insertion hole 32, but the cross section of the truncated conical portion 23 engaging with the plate 3 becomes larger in diameter. Both reject each other. The relative displacement between the two by this exclusion is the height of the truncated cone 23,
It is determined by the vertical gradient, the truncated cone 23 and the final screwing position. As a result of this movement, concrete products 10 and 11 will be tied. In the example of the drawing, the concrete products 10 and 11 are relatively closely moved via the packing 15 by moving relatively in the left-right direction by the displacement amount a (see FIGS. 3 and 4).

5 to 8 show an example in which the insertion hole 32 is an oval shape 32 'having a larger diameter on the other end side. The small diameter portion of the egg shape 32 ′ is smaller than the head side of the truncated cone portion 23. This allows
Radial displacement amount a of the binding bolt 2 due to the truncated cone 23
(See FIG. 3)
4 to 4 can be made larger.

Of course, the bolt 31b may use the fastening bolt of the present invention, and the through hole 31a may have an oval shape.

FIG. 9 shows an example in which U-shaped grooves are connected by using a tying member 1, and FIG.
Fig. 10 shows an example where manholes are connected.

FIG. 11 shows that the frusto-conical portion 23 of the fastening bolt 2 has a frusto-conical piece 2 having a shaft hole 22 'in a shaft portion 21' of a normal bolt 2 '.
3 'shows a case in which 3' is rotatably fitted. First
When the truncated cone portion 23 is integral with the shaft portion 21 as in the examples of FIGS. 8 to 8, the rotational movement itself may be difficult due to friction with the peripheral edge of the insertion hole 32 of the plate 3. According to the example, such a problem can be avoided.

The fastening plate 3 of FIG. 12 has an insertion hole 32 of the fastening bolt 2 straddling the plate 3 and a ground 33 formed on the upper surface thereof. It has the same gradient as the conical surface of the truncated cone 23.
In the example of FIG. 1, the binding plate 3 and the binding bolt 2
Depending on the material or the weight of the concrete product 10 or 11, the corner of the peripheral edge of the insertion hole 32 may bite into the surface of the truncated cone 23, but according to the present example, such a problem is avoided. can do. Similar effects can be expected by simply adding a radius to the periphery of the insertion hole 32 instead of this example.

[Effects of the Invention] According to the tying tool of the present invention, concrete products can be tied together simply by screwing the tying bolt.

According to the second aspect, since the insertion hole formed in the binding plate has a large-diameter egg shape on the side of the connecting means, the movement amount of the plate can be increased.

According to the third aspect, the binding operation can be performed more smoothly due to the inclination of the truncated cone portion of the binding bolt and the insertion hole of the binding plate.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of an embodiment of a tying member before the product is tied, FIG. 2 is a cross-sectional view taken along a line II-II, FIG. 3 is a cross-sectional view of the same tying state, and FIG. IV line sectional view, FIG. 5 is a sectional view before product binding using another embodiment of the fastener, FIG. 6 is a sectional view taken along line VI-VI of FIG. 7, FIG. 8 is a sectional view taken along the line VIII-VIII, FIG. 9 is a slope view in a state where the U-shaped groove is fastened, FIG. 10 is a slope view in a state where the manhole is fastened, and FIG. 11 is another embodiment of the fastening bolt. FIG. 12 is a front view of the example, and FIG. 12 is a cross-sectional view before fastening a product using another embodiment of the fastener. DESCRIPTION OF SYMBOLS 1 ... Tightening tool, 2 ... Tightening bolt, 2 '... Bolt, 3 ... Tightening plate, 10, 11 ... Concrete product, 12, 13 ... Insert, 14 ... Washer, 15 ... Packing, 21 ... Shaft, 21' ... Shaft, 22 ... Head, 22 '... Shaft hole, 23 ... Truncated cone, 23' ... piece,
31 ... connecting means, 31a ... through-hole, 31b ... bolt, 31c ... washer, 3
2 ... insertion hole, 32 '... egg-shaped, 33 ... ground, 34 ... engagement part, a ... displacement amount, b ... movement amount.

Continuation of the front page (58) Field surveyed (Int. Cl. ⁶ , DB name) F16B 35/00 F16B 5/02 E03F 5/04

Claims (3)

(57) [Scope of request for utility model registration] 1. A fastening bolt (2) and a fastening plate (3). The fastening bolt (2) has a head side between a shaft (21) and a head (22). A frustoconical portion (23) having a large diameter is provided, and the binding plate (3) is a dimension between the inserts (12, 13) buried in the vicinity of the connection portion of the product (10, 11) to be bound to each other. The connecting bolt (2) for one product (10) is provided at one end with a connecting means (31) for connecting to the other product (11) at the other end while maintaining a size substantially conforming to the above.
And has an insertion hole (32) elongated toward the connecting means (31), and connects the other end of the binding plate (3) to the other (11); This insertion hole (3
When the fastening bolt (2) is screwed into the one product (10) through 2), the insertion hole (32) and the truncated cone portion (23) are engaged and displaced from each other. 10,11)
A tying device (1) for tying each other. 2. The insertion hole (32) has a large-diameter oval shape (32 ') on the side of the connecting means (31), and one end side has a truncated cone portion (23) of the fastening bolt (2). 2. The fastener (1) according to claim 1, wherein said fastener is smaller than said head (22) side. 3. The fastening device according to claim 2, wherein the engaging portion of the insertion hole with the truncated cone portion has a slope substantially equal to that of the conical surface. 1).