JPS60248590A - Connector for hanging - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Purpose (Industrial Field of Application) This invention relates to a suspending device for hanging concrete products, more specifically, a locking device for suspending a concrete product by a crane or the like when moving the concrete product. It relates to a hanging fixture that is embedded within a product.

(Prior Art) In recent years, concrete products such as U-shaped grooves that are mass-produced using formwork have tended to become larger. Therefore, when these concrete products are transported or laid on site, a method has been taken in which a lifting wire is wound around the concrete products and the products are hoisted up by a machine. However, with this method, it is practically difficult to provide a locking part for hanging the wire on the outer surface of the concrete product, so there is a risk that the wire may come off from the concrete product during transportation, installation, etc. was there.

Furthermore, a method was proposed in which a hanging hole for inserting a hanging fitting is provided in advance during the manufacture of a concrete product. The problem was that excessive stress was concentrated only in one part, and the holes were susceptible to damage due to the application of excessive tensile force, which is a weak point of concrete products.

Therefore, the present applicant proposed a hanging fixture as shown in FIGS. 6(a) to 6(d) in Utility Model Application No. 58-68178. The locking tool has a pair of upper and lower movement prevention members 26 having a cross section of 26 mm projected on the outer peripheral surface of a fixing member 21 formed in a cylindrical shape from a synthetic resin material, and furthermore, the fixing member 21 is A screw 25a is provided along the entire length of the hole 25. When manufacturing the concrete product C, the fixing member 21 is buried in advance so that its outer end opening is exposed on the same plane as the outer surface of the concrete product C, and is inserted into the insertion hole 25 from the opening 21a.
A longer bolt 33 was to be screwed inside.

Then, as shown in FIG. 6(+)), (C) or (d), the metal fitting M connected to the wire W etc. is locked to the base end of the bolt 33 protruding outside from the fixing member 21. As a result, the concrete product C was suspended horizontally or vertically from a concrete container such as a crane.

However, when the concrete product C was suspended horizontally using the above-mentioned locking tool, the worker's carelessness caused the bolt 3
3 is not fully screwed into the insertion hole 25 of the fixing member 21, but is screwed only into the vicinity of the opening 21a, and when the concrete product C is hung from the crane, the fixing member 21
Due to the weight of the concrete product O, there was a risk that the concrete product C would detach from the bolt 33 and fall, causing an accident.

-Niya tL bowl #Kokichi mocking. To be on the safe side, insert the bolt 33 into the insertion hole 2 of the fixing member 21.
5, the work tended to be complicated. However, in reality, when the bolt 33 is screwed into the insertion hole 25 having an inner diameter of 15 m111, it can withstand a weight of about 3001 cg if it is screwed together with the screw 25a having a length of 20 wings. Based on the values like above,
When the required amount of bolts 33 are screwed into the insertion holes 25 of the fixing member 21, if the required amount is not reached, the bolts 33 are screwed into the insertion holes 25 of the fixing member 21.
1 and cause an accident. In addition, the insertion hole 25
If the total length of the fixing member 21 is shortened in order to shorten the length, the pull-out strength of the fixing member 21 inside the concrete product O will be weakened, and the fixing member 21 will be removed from the concrete product C.
This may result in the vehicle becoming detached from the vehicle and causing an accident.

(Problems to be Solved) As mentioned above, this invention compensates for the weaknesses of the concrete product itself, and also aims to prevent hanging metal fittings such as bolts from sticking due to worker's carelessness during horizontal hanging. ? By screwing the screw in one dimension → lifting it ← getting it h-, you can avoid car accidents, and when vertically hanging it, you can reduce the complexity of the work by not weakening the pull-out strength of the fixing member in the concrete product. This eliminates the risk of the hanging metal fittings separating from the fixing member.

Structure (Means for Solving the Problems) In order to solve the above-mentioned problems, the present invention provides a fixing member with protruding fins for preventing movement, and a female thread only on the rear half of the inner peripheral surface of the metal fitting insertion hole. This method adopted the method of screw-engraving.

(Function) By adopting the above means, the hanging metal fitting is deeply screwed into the metal fitting insertion hole of the fixing member, and the female thread is formed on the inner circumferential surface of the threaded part of the hanging metal fitting insertion hole. and are screwed together for the length necessary to lift the concrete product.

EXAMPLE Below, the first example of the present invention will be described in detail with reference to FIGS. 1 to 4. 1 is a substantially cylindrical composite material buried in the upper end of a side plate S of a concrete product C such as a prong B for a U-shaped groove. The resin fixing member 1a is a metal fitting insertion hole drilled over almost the entire length of the fixing member 1, leaving only the rear end closed portion. The fixing member 1 has a distal end opening 2 exposed on the same plane as the upper end surface of the side plate S of the block B, and a female thread 3 is cut in the rear half of the inner peripheral surface of the metal fitting insertion hole 1a. Note that, as is clear from the test results described later, the length of the female screw 3 is preset according to the inner diameter of the insertion hole 1a and the weight of the block B, but in this example, the length of the metal fitting insertion hole 1a is determined in advance. It shall be provided throughout the rear half.

4 is a retaining flange protruding from the rear end of the fixing member 1; 5i;
Particularly, as shown in FIG. 2, four anti-movement fins extend continuously from the rear of the outer edge of the tip opening 2 to the retaining flange 4 while being inclined so that the rear end side becomes higher,
A plurality of them are arranged at equal intervals in the circumferential direction of the fixing member 1. The movement prevention fins 5 prevent the fixed member 1 from separating from the block B or from moving within the block B due to rotation, displacement, etc.

Reference numeral 6 denotes a hanging metal fitting that is 9 times larger than the fixing member 1 from the outside, and is composed of an annular locking portion 7 provided at the outer end and a round bar-shaped male screw thread 8 protruding from the locking portion 7. It has become. In addition,
As shown in FIG. 1.8, the male threaded portion 8 of the hanging fitting 6 is screwed into the female screw 3 in the fixing member 1 embedded in the block B, so that it is fixed to the fixing member 1. Further, as shown in FIG. 2, a wire W or the like is passed through the locking portion 7 of the fixing member 1 outside the block B and suspended by a hook of a crane or the like.

When the block B is suspended using the hanging fixture configured as described above, the movement prevention fins 5 are placed on the fixing member 1 over the entire length thereof and on the retaining flange 4. This shape disperses the stress caused by the block B's own weight and external forces such as shaking, and the movement prevention fin 5 is tapered to be higher at the rear end, so it can be used for large Even if an external force is applied, the entire length will not be damaged by the force, and the fixing member 1 can be prevented from detaching from the block B.

When the block B is suspended from the crane, an upward force is applied to the fixing member 1, causing the fixing member 1 to shift outward. This prevents the extraction from coming out of block B.

Furthermore, since the movement prevention fins 5 are hardened with concrete, when the hanging bracket 6 is strongly tightened to the fixed member 1, rotational force is applied to the fixed member 1, causing the fixed member 1 to rotate and shift its position. things will be prevented.

Furthermore, since the female thread 3 is not formed in the upper half of the inner circumferential surface of the metal fitting insertion hole 1a of the fixing member 1, the operator must deeply insert the male threaded part 8 of the hanging metal fitting 6 into the metal fitting insertion hole 1a of the fixing member 1. After inserting it, it must be screwed into the female thread 3. Therefore, it is not necessary to screw the male threaded part 8 of the hanging fitting 6 over the entire length of the inner peripheral surface of the fitting insertion hole 1a of the fixing member 1, and the hanging fitting 6 can be fixed by screwing it in a short distance. Part 1
The work is easy because the hanging fitting 6 is fitted with the female thread 3 of the fitting insertion hole 1a for the length necessary to hang the block B. Therefore, the hanging fitting 6 will not come off from the fixing member 1.

When we conducted a strength test on the locking device constructed in this way, we obtained the following results regarding the pull-out strength of the fixing member 1 inside block B, which shows that it can withstand even when heavy block B is hung vertically. It has been proven that it is.

In the above configuration, the hanging fixture has been explained only when the block B is hung vertically. It is also possible to hang the block B horizontally by embedding it in the block.

Even when hanging horizontally, it is necessary to deeply insert the male threaded part B of the hanging metal fitting 6 into the metal fitting insertion hole 1a of the fixing member 1 and then screw it into the female thread 3. A sufficient amount of the metal fitting is inserted into the fitting insertion hole 1a.

Now, a method for embedding the fixing member 1 in the pronk B will be described.

As shown in FIG. 4, reference numeral 9 denotes a bolt-down sealing member placed outside the formwork F during the manufacturing process of block B, and includes a pair of round housing nondles 10 that protrude in substantially opposite directions in the circumferential direction. It consists of a head '11 and a male threaded part 12 protruding from the inner surface of the head '11. Furthermore, a communication hole A having approximately the same diameter as the metal fitting insertion hole 1a of the fixing member 1 arranged inside the formwork F is provided at a desired position on the side plate of the formwork F, and the sealing member is passed through the communication hole A. The male threaded portion 12 of 9 is screwed into the female thread 3 of the fixing member 1.

Now, in order to embed the fixing member 1 in the block B, the opening 2 of the fixing member 1 and the inner end of the sealing member 9 are aligned with each other through the communication hole A of the formwork F, and then the fixing member 1 is moved. Turn the prevention fin 5 to assemble both members 1 and 9, and then
As shown in the figure, the handle 10 of the sealing member 9 is tightly tightened, the outer end surface of the fixing member 1 is brought into close contact with the periphery of the continuous hole A of the formwork F, and cement is poured into the formwork F. Since the outer end surface of the fixing member 1 is in airtight contact with the formwork F, there is no risk of cement leaking into the opening 2.

After the cement hardens, the sealing member 9 is screwed back from the fixing member 1, and the outer formwork F is removed. Then, since the outer end of the fixing member 1 is exposed flush with the surface of the block B and is open, if the male thread part B of the hanging metal fitting 6 is screwed into the female thread 3 of the fixing member 1, the hanging metal fitting is completed. 6 is firmly attached to the fixing member 1. Also, 1. You can also remove the male screw 12 of the hanging bracket 6.
It is only necessary to unscrew it from the female thread 3 of the fixing member 1, and the attachment/detachment work is very simple.

Further, FIGS. 5(&) to (d) show a second embodiment of the present invention.

That is, in FIG. 5(a), the movement prevention fin 5 is formed so as to extend from the distal end opening 2 of the fixing member 1 to a position slightly near the rear end to the retaining flange 4, and furthermore, the movement prevention fin 5 is A step @sa is provided approximately at the center in the length direction to further prevent the fixing member 1 from being pulled out within the block B when the locking tool is used.

Further, to explain the movement prevention fin 5 shown in FIG. 5(b) in order, the outer peripheral edge of the opening 2 of the fixing member 1 is slightly protruded in the radial direction to form a protruding end 2a, and it can be pulled out from the protruding end 2a. Movement prevention fins 5 are formed to extend obliquely toward the stop flange 4. If you configure it like this,
When the rotational force of the hanging fitting 6 is applied to the fixed member 1, the effect of preventing displacement of the movement prevention fins 5 becomes even greater.

Further, FIG. 5(C) shows movement prevention fins 5 extending obliquely from the outer peripheral edge of the opening of the fixing member 1 to the retaining flange 4.
5(d) shows a trapezoidal anti-movement fin 5 provided on the rear half of the fixing member 1.

Effects As detailed above, the present invention has a structure that prevents the fixing member 1 from being pulled out from the concrete product C on the outer peripheral surface of the substantially cylindrical fixing member 1 to be buried in the concrete product C. In addition to forming protruding anti-movement fins 5 to prevent concrete products from being suspended, a female thread 3 is threaded only in the rear half of the inner peripheral surface of the metal fitting insertion hole 1a recessed in the length direction of the fixing member 1. When the product is suspended, it does not come off from the concrete product, and the component parts are less likely to come off from each other when suspended horizontally or vertically, which makes it possible to avoid danger during work and facilitate screwing work. It has this excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing the hanging fastener of the present invention, FIG. 2 is a front view showing the usage state of the hanging fastener, and FIG.
The figure is a partially cutaway perspective view of the hanging fixture, Figure 4 is a sectional view showing the fixing member attached to the formwork and buried in the block, and Figure 5 is a perspective view showing the fixture. , a front view, a front view showing a usage state, and a front view showing another usage state. Fixing member 1, metal fitting insertion hole 1a, female screw 3, anti-movement fin 5, concrete product c0 Patent applicant: Tadashi Hitoshi, Attorney: Hironobu Onda, patent attorney, Fig. 2, Fig. 5 (a) Hasa (C) (b) (d)

Claims (1)

[Claims] 1. On the outer circumferential surface of a substantially cylindrical fixing member (1) to be buried in the concrete product (0), the fixing member (1) is attached to the concrete product (0). A movement prevention fin (5) is formed to protrude to prevent the fixing member (1) from being pulled out, and a female thread is provided only in the rear half of the inner peripheral surface of the metal fitting insertion hole (1a) recessed in the length direction of the fixing member (1). A locking device for hanging a concrete product, characterized by having (3) threaded on it. 2 The female screw (3) is inserted into the metal fitting insertion hole (
1a) The anchor for hanging a concrete product according to claim 1, characterized in that the entire rear half of the inner circumferential surface is threaded. 3 The female screw (3) is inserted into the metal fitting insertion hole (
1a) A locking device for hanging a concrete product according to claim 1, characterized in that a screw is carved on one side of the rear half of the inner circumferential surface of 1a). 4. Move the movement prevention fin (5) from the outer periphery of the distal end opening (2) of the fixing member (1) to the rear end of the fixing member (1) so that the rear part becomes higher in the entire length direction of the fixing member (1). The anchor for hanging a concrete product according to any one of claims 1 to 3, characterized in that the anchor is tapered and extends continuously. 5. A patent claim characterized in that a retaining flange (4) is provided at the rear end of the fixing member (1) to prevent the fixing member (1) from being pulled out from the concrete product (0). A locking tool for hanging a concrete product according to any one of items 1 to 8. 6. Any one of claims 1 to 3, wherein a plurality of the movement prevention fins (5) are arranged at equal intervals in the circumferential direction of the fixing member (1). Anchors for hanging concrete products as described in the above. 7 The movement prevention fin (5) extends from the protruding end (2a) that slightly protrudes in the radial direction to the rear end of the fixing member (1) at the outer peripheral edge of the opening (2) of the fixing member (1). Conc IJ according to claim 1, characterized in that the sides are formed to extend at an angle so that the sides are higher.
Locking device for hanging the product.