JPH04117038U - Anchor bolt slag adhesion prevention device - Google Patents

Abstract

(57) [Summary] (with amendments) [Purpose] To prevent slag from adhering to the threads of anchor bolts that secure column bases, etc. during concrete pouring. [Structure] A cylindrical cap is inserted into the threaded part 2 of the anchor bolt 1 that protrudes from the foundation concrete, and a nut 10 is screwed onto the threaded part 2 to attach it.After concrete is poured, the nut 10 is removed. Remove the cap and screw part 2.
I tried to expose it.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

This invention embeds anchor bolts for fixing column bases of buildings, etc. in foundation concrete. When erecting, attach the threads for fixing the anchor bolts to This invention relates to a device that prevents slag from sticking.

0002

[Conventional technology]

Anchor bolts are a method of fixing column bases of buildings, etc. to foundation structures. Many things are being implemented. This method uses anchor bolts in the concrete of the foundation structure. There are various types of waste disposal methods, but generally, for example, the one shown in Figure 12 is Attach the screw part 2 for fixing the column base to the steel frame 16 fixed on the waste concrete 15 so that A large number of the provided anchor bolts 1 are erected and the upper ends of the anchor bolts are attached. The height position where the upper parts of the anchor bolts 1 and 1 are exposed for the required length, i.e. Pour concrete 11 to the concrete stop position a, and then tighten anchor bolt 1. , 1 will be sent to landfill. After the poured concrete has hardened, it is added Remove rate 12 and attach the column base to anchor bolts 1 and 1 that protrude from the concrete. It is fixed.

0003

[Problem that the idea aims to solve]

By the way, when placing the concrete mentioned above, attach the column base to the anchor bolt 1. In order to prevent slag from adhering to the screw part 2 that fixes the Wrap tape 20 around the threaded part 2 to protect it, and use this tape 20 when fixing the column base. This work is extremely troublesome and leads to a decrease in construction efficiency. It was.

0004 This invention solves the above conventional problems and prevents slag from sticking to the threaded part of the anchor bolt. The aim is to improve construction efficiency by making it easier to perform the necessary work. be.

[0005]

[Means to solve the problem]

Regarding the configuration of the present invention to achieve the above purpose, the drawings corresponding to the embodiments are shown below. To explain with reference, the slag adhesion prevention device according to claim 1 has a screw portion 2 for fixing the column base 18. In the threaded part 2 of the anchor bolt 1 which is provided with, which protrudes from the foundation concrete 11, Insert the cap 3 formed into a cylindrical shape, and tighten the screw nuts 9 and 10 onto the threaded portion 2. It is characterized by being detachably attached.

[0006] Further, the slag adhesion prevention device of claim 2 is provided with an anchor provided with a screw portion 2 for fixing the column base 18. A threaded portion 14 having a smaller diameter than the threaded portion 2 is provided protruding from the upper end of the car bolt 1, and this anchor - A cylindrical key is attached to the threaded part 2 of the bolt 1 that protrudes from the foundation concrete 11. Insert the cap 3 and removably attach it to the small diameter screw part 14 using the nut 10 screwed into it. It is characterized by:

[0007]

【Example】

FIG. 1 is a partially cutaway vertical sectional view showing one embodiment of the device of the present invention, and 1 is an anchor bolt. , 3 is a cap formed into a cylindrical shape. Anchor bolt 1 is as shown in Figure 2. , a screw part 2 used for fixing the column base 18 extends over a predetermined length on the top of the deformed reinforcing bar. It is provided. In addition, the cap 3 has the above-mentioned threaded portion 2 as shown in FIGS. 3 and 4. It is used to prevent slag from adhering to the screws, and is a cylinder etc. that can be loosely inserted into the threaded part A top plate 5 provided at the upper end of the cylindrical body 4 is provided with a hole 6 through which the threaded portion 2 can pass. At the part 8 where the anchor bolt 1 protrudes from the reclaimed foundation concrete 11. are formed to similar lengths.

[0008] As shown in FIG. 1, the cap 3 has a receiving nut 9 screwed onto the anchor bolt 1. After that, the cylindrical body 4 is placed over the protruding part 8 including the threaded part 2, and the upper end of the threaded part 2 is Place the top plate 5 on the receiving nut 9 through the extraction hole 6, and tighten the fixing nut 10 to install it. . At that time, between the top plate 5 of the cap 3 and the fixing nut 10, a The anchor bolts 1 and 1 are fixed at the same time by interposing an attachment plate 12 that connects them together.

[0009] 5 and 6 show other embodiments of the cap 3, in which the cap 3 is connected to the top plate from the cylindrical body 4. A vertical slit 7 is provided over the entire length up to 5. this cap 3, use the opening of the vertical slit 7 to attach the cap 3 to the anchor bolt. Each anchor bolt 1 can be inserted by pushing it in from the side of the anchor bolt 1. , 1, the cap 3 can be attached even when the attachment plate 12 is engaged with the upper part of the cap 3. become. After installing the cap 3, put tape on the vertical slit 7 to close it. Bye.

0010 Next, an example of an anchor bolt facility using the device of the present invention will be explained. As shown in the figure, attach the required number of anchor bolts to the steel frame 16 fixed on the waste concrete 15. 1, 1 will be erected. Then, insert the cap 3 onto the top of each anchor bolt 1. Attach and uninstall the cap 3 by engaging the attachment plate 12 and tightening the nut 10. Connect the upper ends of car bolts 1 and 1 to each other. In this case, the lower end of cap 3 It is preferable to use a cap 3 with a length that matches the stopping position a of the cleat. stomach.

[0011] In this state, concrete 11 is poured to its stopping position a. In this case, The bottom end of step 3 will serve as a guideline for concrete pouring. Hardness of poured concrete 11 After conversion, as shown in Figure 10, remove the nut 10, remove the attached plate 12, and remove the cap. Pull out the bolt 3 to expose the threaded portion 2 of the anchor bolt 1. Next, as shown in Figure 11. Attach the base of the column base 18 to the anchor bolts 1 and 1 that protrude from the concrete 11, as shown. Engage the sprate 19 and tighten the nuts 20, 20 to the anchor bolts 1, 1 to fix it. It is.

0012 FIG. 7 shows an example in which a threaded reinforcing bar is used for the anchor bolt 1. screw iron As shown in Figure 8, a screw 2 is threaded along the entire length of the strut, and this screw 13 is attached to the column. It is screwed together with the nut 17 that fixes the leg 18. When using such threaded reinforcing bars, A small-diameter threaded portion 14 into which the fixing nut 10 is screwed is provided protrudingly from the upper end. In this case, The top plate 3 passes the threaded part 14 through the hole 6 and attaches the top plate 5 to the shoulder part 15 formed at the base end of the threaded part. Cover the top screw 13 of anchor bolt 1 with threaded reinforcing bar, fixing nut It will be fixed with 10 tightenings.

[0013]

[Effect of the idea]

As explained above, an anchor bolt with a threaded part is used to secure the column base. Screws that protrude from the foundation concrete when filling in the foundation concrete A cap is attached to the part to cover it, making it easier to pour concrete. This will prevent slag from adhering to the threaded portion of the anchor bolt. Special In addition, there is no need to go through the troublesome work of covering the threads with tape, etc., as in the past. It is a simple operation, just put the cap on and tighten the nut that connects the attachment plate. Not only does this save time, but the nut can also be removed and pulled out after concrete is poured. It is only necessary to do this, and construction efficiency can be greatly improved.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway vertical sectional view showing an embodiment of the present invention.

FIG. 2 is a front view of essential parts of the anchor bolt.

FIG. 3 is a plan view showing the cap.

FIG. 4 is a partially cutaway vertical cross-sectional view of the same.

FIG. 5 is a plan view showing another embodiment of the cap.

FIG. 6 is a longitudinal cross-sectional view of the same portion.

FIG. 7 is a partially cutaway vertical sectional view showing another embodiment of the present invention.

FIG. 8 is a front view of essential parts of the anchor bolt.

FIG. 9 is a side view showing an example of an anchor bolt facility using the device of the present invention.

FIG. 10 is a side view showing the state with the cap removed.

FIG. 11 is a side view showing the column base in a fixed state.

FIG. 12 is a perspective view showing an example of a conventional anchor bolt facility.

FIG. 13 is an explanatory diagram of a conventional slag adhesion prevention means.

[Explanation of symbols]

1 Anchor bolt 2 Thread part 3 Cap 6 Hole extraction 7 Vertical slit 8 Projection 9 Receptacle nut 10 Fixing nut 11 Concrete 12 Attachment plate 14 Small diameter screw 15 Shoulder a Concrete pouring position

Claims (2)

[Scope of utility model registration request] [Claim 1] A cylindrical cap is inserted into the threaded part of an anchor bolt that is provided with a threaded part for fixing a column base and protrudes from the foundation concrete, and can be freely attached and removed by a nut screwed into the threaded part. A slag adhesion prevention device for anchor bolts, which is characterized by being installed on. [Claim 2] A threaded portion having a smaller diameter than the threaded portion is provided protruding from the upper end of the anchor bolt provided with the threaded portion for fixing the column base,
The anchor bolt is characterized in that a cylindrical cap is inserted into the threaded portion of the anchor bolt that protrudes from the foundation concrete, and is detachably attached to the small diameter threaded portion using a threaded nut. Prevention device.