JPS6131115Y2 - - Google Patents

Description

[Detailed description of the invention] This invention relates to a guide sleeve for anchor bolts that allows anchor bolts to be driven into concrete, bedrock, or other base materials without using a template and at a desired location in a short time. It is something.

When anchor bolts are driven into concrete, bedrock, or other suitable base material using tubular resin capsules filled with synthetic resin, curing accelerator, aggregate, etc., and fixed, conventional construction methods include:
Marking points are stamped in advance on the base material at the locations where the anchor bolts are to be driven (commonly called scribing), and then later a hole equal to the outer diameter of the tubular resin capsule to be inserted is drilled using a drilling machine around the marking points. After drilling and inserting the tubular resin capsule into this hole with the desired void above, a bolt hole equal to the diameter of the anchor bolt to be driven is pre-drilled at a point that coincides with the marker point. Place the prepared template on the top surface of the base material so that the center of the bolt hole coincides with the center of the inserted hole of the tubular resin capsule, and then anchor it to the tip of a device such as a hammer drill or rock drill. After the bolt is attached and the anchor bolt is inserted into the tubular resin capsule by the rotation and impact of the device, the device is removed from the hole and the template is pulled out from the upper end of the anchor bolt. However, when driving the lever, the tubular resin capsule is broken and the internal synthetic resin, curing accelerator, aggregate, and glass tube of the crushed capsule are mixed and hardened within a short period of time (usually about 30 minutes) to become the anchor. The bolt will be fixed in place on the base material. The anchor bolt is driven and fixed into the base material through the process described above, but as mentioned above, after the anchor bolt is fixed to the base material, the template does not need to exist at all. Since it is necessary in the middle of the installation process, it takes a lot of time and effort to select the anchor bolt fixing position and drill bolt holes, and when the anchor bolt fixing position to the base material is changed, If the fixing position of the anchor bolt is different from the current fixing position elsewhere, the template becomes unusable and a new template must be prepared, which is extremely uneconomical from a material standpoint. For the contractor, this would incur significant wasted expense, and it would be necessary to always match the center of each marker point with the bolt, to make a hole equal to the outer diameter of the tubular resin capsule in the base material, and to make the bolt It is practically difficult to perform the construction method accurately and uniformly, such as drilling equal holes in the template, and sometimes it is difficult to drill holes that make it impossible to insert a tubular resin capsule, or to drill holes that are too large. Depending on the setting, unforeseen situations such as the inability to hold the tubular resin capsule in the specified position may occur, and it may also be necessary to always drive the anchor bolt into the base material properly and uniformly. In fact, it is currently difficult to do so, and when the tubular resin capsule of the anchor bolt is crushed, the filler inside the capsule flows out from the outside of the hole, causing damage to the anchor bolt that has been driven in and the vicinity of the base material. There are a number of drawbacks to the implementation, such as adhesion and solidification, which can interfere with the installation of members to be attached to anchor bolts, and the need to remove them under fluid conditions. Therefore, in order to improve the above-mentioned drawbacks, this invention uses a guide sleeve for anchor bolts that uses a template and can always fold and fix anchor bolts properly and uniformly in the predetermined position of the base material. A groove is provided on the outer circumferential edge of a cylindrical part having a flange integrally projected and formed on the upper end thereof, and this groove is communicated with a through hole bored in the flange, and A reference line is engraved on the top surface of the flange.

An embodiment of this invention will be described below with reference to the drawings. A flange 2 is integrally formed on the upper end of a cylindrical part 1 made of a suitable material such as synthetic resin or steel plate, and an appropriate number of flanges ( While drilling (here, three) through holes h, an appropriate number (here, four) of thin groove-shaped reference lines a are engraved on the upper surface of the flange 2, and the opposing reference lines a are connected to each other. At this time, grooves b are provided at both the upper and lower ends of the cylindrical portion 1 so that they are perpendicular to each other and communicate with each of the through holes h to prevent the extraction of water, air, etc., and the overflow of the resin r, which will be described later. It is intended to prevent this and equalize the internal pressure. Therefore, the inner diameter d of the cylindrical portion 1 is slightly larger than the outer diameter e of the anchor bolt 3 to be used,
When inserting the anchor bolt 3 into the cylindrical part 1, make sure that it is not damaged by vibration, impact, etc. The means for driving and fixing the base material M of the anchor bolt 3 is as shown in FIG. and aggregate k to glass tube g
While the tubular resin capsule 5 filled inside is placed, the flange 2 is locked to the upper edge of the hole 4, and the cylindrical portion 1 is left hanging down. Further, the outer diameter of the cylindrical portion 1 is made equal to the diameter of the hole 4. In addition,
In use, in order to fix the product to the base material M, in addition to the through hole h, an appropriate number of fixing holes (not shown) should be bored in the flange 2, or other suitable fixing means should be used. adopt. C in the figure is a cap.

This idea is structured as described above. When driving and fixing the anchor bolt 3 into the base material M,
First, as shown in FIG. 5, the tubular resin capsule 5 is placed on the bottom of the hole 4 of the base material M, and then the flange 2 is locked to the upper edge of the hole 4, and the cylindrical portion 1 is suspended into the hole 4. At the same time, a fixing device (not shown) such as a bolt is inserted into the base material through the fixing hole and fixed, and then attached to the tip of a device (not shown) such as a hammer drill, rock drill, etc. When the anchor bolt 3 is attached and lowered while rotating and applying an impact toward the inside of the cylindrical part 1, the anchor bolt 3 is moved into the cylindrical part 1.
The tubular resin capsule 5 is then crushed, and the resin r, hardening accelerator f, aggregate k and crushed glass tube g are mixed, and as a result, after a suitable time (about 30 minutes) has passed, it hardens. Hole 4
A part of the anchor bolt 3 together with the cylindrical portion 1 is embedded in the base material. The remaining resin r etc. rises through the groove b and fills the gap between the inner peripheral edge of the hole 4 and the outside of the cylindrical part 1, so that the resin r accidentally overflows from the upper end of the hole 4 to the outside. There is no fear.

According to this invention, when embedding anchor bolts in concrete, bedrock, or other base materials, a template, which was previously considered indispensable, is not used at all. Since no labor or time is required, the economic burden on the contractor and construction owner is significantly reduced.Also, even when the diameter of the hole in the base material is larger than a predefined value, the reference line stamped on the flange can be used. By matching the marking center on the base material side, it is possible to drive the anchor bolt accurately, and since the anchor bolt is guided and lowered by the cylindrical part, uniform driving and fixing can be ensured at all times. Compared to the conventional driving and fixing state, it is possible to improve the embedding accuracy when embedding into the base material, and the presence of grooves extending up and down on the outer circumference of the cylindrical part eliminates excess resin, etc. When , it rises along the groove,
It fills the gap between the inner circumferential edge of the hole and the outside of the cylindrical part, and there is no risk of leakage to the outside from the upper end of the hole. During construction, in order to properly insert the anchor bolt into the base material, it is usually necessary to use an L-shaped anchor bolt to secure the guide piece and the base material to the base material prior to inserting the anchor bolt. On the other hand, because the presence of the cylindrical part eliminates the need for such a member, the work process can be shortened, and furthermore, construction can be done underwater as in the past, and the angle at which the anchor bolt is buried in the base material can be easily adjusted. This allows the user to construct the system more easily, accurately, and quickly than with conventional construction methods, and the overall structure is extremely simple, so it can be manufactured robustly and inexpensively. Therefore, it has practical benefits such as being able to supply large quantities to users.

[Brief explanation of the drawing]

The drawings show one embodiment of this invention, and FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is a sectional view taken along the line -- in FIG. 2, and FIG. 4 is a sectional view taken along the line -- in FIG. FIG. 5 is a vertical sectional view, partially cut away, showing how the product is used. 1...Cylindrical part, 2...Flange, a...Reference line, b...Groove, h...Through hole.

Claims (1)

[Scope of utility model registration request] A groove is provided on the outer circumferential edge of the cylindrical part, which has a flange integrally projected and formed at the upper end, extending from both the upper and lower ends, and this groove is communicated with a through hole drilled in the flange, and a reference line is engraved on the upper surface of the flange. A guide sleeve for anchor bolts.