JPS61225499A - Production of cartridge for fixing bolt - 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 <Industrial Application Field> The present invention relates to a method for manufacturing a cartridge for bolt fixation, in which a bolt is drilled into a base material such as concrete or rock, and a bolt is embedded and fixed therein.

<Conventional technology> Conventional bolt fixing car) In IJ Tsuji, the reactive base agent and curing agent are stored separately in an outer container and an inner container, respectively, and by destroying the cartridge when driving the bolt, the reactive base agent and curing agent are separated. and a hardening agent were mixed and reacted to harden, fixing the bolt.

<Problems to be solved by the invention> Generally speaking, in such cartridges for fixing bolts, the inner container (often tubular) must have a small diameter. Containment was an extremely labor-intensive method.

In addition, bolts are used during drilling to secure the bolts, and the cartridge is destroyed, and it becomes an aid when mixing the reactive base material and the hardening agent. In order to prevent shrinkage after hardening, the outer container is often filled with several nanometers of granular aggregate, such as natural crushed stone or magnesia clinker. significantly delayed filling.

Furthermore, although a glass tube or the like is normally used as the inner container, the weight of the inner container in the overall cost of the cartridge cannot be ignored.

<Means and effects for solving the problem> The present inventors:
As a result of various studies on manufacturing methods for cartridges for bolt fixing in the above-mentioned situation, we found that by forming a hardened layer on the contact surface between the main reaction agent and the curing agent, we could produce bolt fixing cartridges without the above-mentioned problems. It has been discovered that a cartridge can be manufactured and the present invention has been developed.

This is a method for manufacturing a cartridge for bolt fixing, which is characterized in that after either a reactive main agent or a curing agent is placed in a container, the other one is placed and left to stand still.

The reactive main agent applicable to the present invention is not particularly limited, but among unsaturated polyester resins, epoxy acrylate resins, epoxy resins, etc. are preferable. As the curing agent, a peroxide such as benzoyl peroxide or methyl ethyl ketone peroxide is selected when the reactive base material is an unsaturated polyester or epoxy acrylate resin, and an amine is selected when the reactive base material is an epoxy resin.

Most of the reactive base agent and curing agent need to be stored separately and unreacted in view of the performance of the cartridge, and the layer thickness of the contact reaction cured portion of the two is approximately several times the order of magnitude.

For safety reasons, hardening agents such as benzoyl peroxide are often used in combination with anhydrous calcium sulfate, dibutyl phthalate, etc. as fillers, but the addition and mixing of these does not impair the effects of the present invention.

On the other hand, the material of the container for accommodating the reactive base agent and the curing agent may be any material such as glass, ceramics, plastic, etc., but it is preferably made of K-shaped material that can be easily deformed, such as a glass tube.

When filling and storing the reactive base agent and curing agent in a container, the order in which the reactive base agent and curing agent are placed is not necessarily determined, and there are several steps to prevent the two from easily mixing. Caution must be taken.

For example, considering the difference in density between the two, place the one with higher density into the container first, or if the curing agent is in powder form, increase the packing density to prevent the reactive base agent from penetrating more than necessary. It is desirable to devise ways to do so. In addition, it is necessary to leave the container at rest until the contact portion between the two reacts and hardens when the two are filled and housed, and the time varies depending on the reaction time. For example, when unsaturated polyester resin is used as the reactive main ingredient and benzoyl peroxide is used as the curing agent, the curing time is about 5 to 30 minutes at room temperature.

<Example> This will be explained in more detail in Examples below.

EXAMPLE A glass tube K having a diameter of 10n+, an inner diameter of 9n, and a length of 80g was filled with powder of a mixture of 0.5g of anhydrous calcium sulfate and 0.2g of benzoyl peroxide.

From above, unsaturated polyester resin 17.9 was poured and contained. Furthermore, 4.1 g of magnesia clinker with a particle size of 1.5 to Z, 4 yxm was charged and housed from above. After putting on the polyethylene cap and letting it stand for about 5 minutes,
When it was turned upside down and shaken, the contact area (approximately 1.51111 mm) between the resin and the curing agent was found to have reacted and hardened, and the two did not react and harden any further.

In addition, as a comparative example, 0.49 anhydrous calcium sulfate and 0.49
．． 159 benzoyl peroxide mixed powder with an outer diameter of 4. On,
A glass tube with an inner diameter of 3.5 flE and a length of 70 mm was filled and housed as an inner container, and the open end port was sealed with silicone resin. This was inserted into the same glass tube as in Example 1. Thereafter, unsaturated polyester resin z5I and magnesia clinker-ζ011 were placed in the container.

Both of the resulting cartridges were loaded into holes drilled in a concrete block, bolts were driven, and the fixation strength was measured to be 28 tons, which was no different from the comparison cartridge.

According to the cartridge manufacturing method of the present invention, in the case of the example, the time required for manufacturing 100 cartridges by one person was comparable to that of the comparative example. Additionally, costs were reduced by 20%.

<Effects of the Invention> Since an inner container for accommodating the curing agent is not required, the manufacturing time can be greatly shortened, and the cost can also be reduced.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of one embodiment of a bolt fixing cartridge according to the present invention. In the figure; 1 is a cap, 2 is a container, 3 is a reactive main agent, 4 is an aggregate, 5 is a reactive hardening layer, and 6 is a hardening agent.

Claims (1)

[Claims] In the manufacture of bolt fixing cartridges that contain a reactive base agent and a hardening agent separately, after housing either the reactive base agent or the hardening agent in a container, the other one is stored and allowed to stand still. A method for manufacturing a cartridge for bolt fixation characterized by