JPS5923840Y2 - Portable mortar feeder - Google Patents

Description

[Detailed explanation of the invention] This invention involves filling mortar into a filling hole drilled in the ground, inserting a bolt, and allowing the mortar to harden.
This paper relates to the improvement of the mortar feeder used in the rock bolt construction method, which integrates the soil and ground.

Recently, the above-mentioned rock bolt construction method, which is a full-surface adhesive method filled with mortar, has come into widespread use in tunnel construction.

The mortar to be filled is of better quality as it sets more rapidly and is harder to mix, and provides a satisfactory overall adhesion effect.

On the other hand, since the filling hole is generally small in diameter and long, there is an upper limit to the hardness of the mortar that can be pumped depending on the diameter and length of the hose used to pump the mortar.

Figure 1 shows an example of a mortar filling work cart conventionally used at tunnel sites.
A mixer 2 is arranged in the middle stage, a mortar feeder 3 is arranged in the lower stage, and mortar is filled into the filling hole 4 in the upper part of the tunnel with a hose 5.

The mixer 2 and mortar feeder 3 used here generally have a large capacity, the length of the hose 5 is about 15 m, and the lifting height to the filling hole 6 directly above reaches 8 m at maximum.

Therefore, only soft mortar can be pumped, and even if the filling hole 6 is filled, the mortar will flow down, making it impossible to fill the hole sufficiently.Also, even if a bolt is inserted, the bolt will fall due to its own weight, resulting in an unsatisfactory full-surface adhesion effect. It's hard to get.

In addition, when using rapid-setting mortar, a large amount of mortar is kneaded at once in the mixer 2 and fed under pressure into the mortar feeder 3, so filling can be done smoothly at first, but
If filling is delayed for some reason, setting may occur and the hose may become clogged, resulting in the inconvenience that a large amount of mortar may become unusable.

Furthermore, since there is no way to check the remaining amount of mortar in the mortar feeder than by removing the top cover and visually checking the inside, it is impossible to accurately grasp the filling amount, and if pressure feeding continues for too long, compressed air will pass through the hose and It may blow through from the exit.

Furthermore, the mortar may turn outside of the hose at the back of the hole, making it impossible to pull out the hose.

The present invention has been made to solve the above-mentioned conventional drawbacks, and aims to provide a mortar feeder that is capable of safely, reliably, and efficiently filling mortar.

Embodiments of the present invention will be described below with reference to the drawings.

In Figures 2 to 4, in the rock bolt method, in which a bolt is inserted after filling a filling hole drilled in the ground with mortar, and the bolt and other piles are integrated by solidification of the mortar, two of the filling holes are A cylindrical container 6 that accommodates the amount of mortar to be filled is provided with an airtight top lid 7,
A pressure plate 9 is provided at the lower end of the detection rod 8 which is slidably passed through the center of the upper lid 7, and the pressure plate 9 is used to pressurize the mortar 11 in the container 6 with compressed air via the pressure plate 9. 9
The outer diameter of the hose 12 is made slightly smaller than the inner diameter of the container 6, and the tip of the hose 12 connected to the lower end of the container 6 is cut at an arbitrary point in the longitudinal direction.
When almost the entire amount has been discharged, the outer circumferential surface 10 of the pressurizing plate 9 closes with the conical inner surface 13 at the lower end of the container 6, so that the compressed air does not pass through the hose 12 and blow through from the hose outlet 14.

Note that, if necessary, a backing may be provided on the outer circumferential surface 10 of the pressure plate 9, or a unit length scale or a capacity scale of the hole suitable for the filling hole may be provided on the detection rod 8.

15 is an air supply hose.

According to the portable mortar feeder of the present invention described above,
It is light because it only accommodates the amount of mortar equivalent to about two filling holes, and can be efficiently filled by carrying it on your shoulder or lifting it as necessary.

In addition, the hose need only be of the shortest length as shown in Figure 3, and the length of the hose is 1/3 compared to conventional hoses, which allows hardened mortar to be pumped, and even from directly above, mortar can be filled without falling, allowing for sufficient Filling and satisfactory full-surface adhesion effects are obtained.

Furthermore, as shown in Figure 3, it is possible to adopt a system in which several portable mortar feeders are used in combination, and a relatively small mixer 16 is used to continuously feed the amount to match the amount used. Even if it stops, the amount of unusable mortar is smaller than before.

Furthermore, the remaining amount or filling amount in the container can be constantly determined by the detection rod.

On the other hand, as shown in Figure 4, by cutting the end of the hose at arbitrary points in the longitudinal direction, the end of the hose is bent, and the mortar does not go outside the hose, and the hose is pushed down by the reaction force of the mortar. .

By holding the hose so that it can be pushed down naturally and checking the amount of filling with a detection rod, it is possible to determine whether the hose is reliably filled, and a satisfactory full-surface adhesion effect can be expected.

Furthermore, by closing the pressure plate and the conical inner surface of the lower end of the container, compressed air is blocked and does not blow through from the hose outlet, making it safe.

As described above, the portable mortar feeder of the present invention can fill with hardened mortar and check the filling amount compared to conventional methods, and also prevents compressed air from blowing out from the hose outlet, making it safer. , enabling reliable, efficient and efficient mortar filling.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram showing an example of a working trolley at a tunnel site using a conventional mortar feeder, Fig. 2 is a vertical cross-sectional view of a portable mortar feeder according to the present invention, and Fig. 3 is a diagram showing an example of a work cart using a conventional mortar feeder at a tunnel site. Schematic diagram showing the work trolley, No. 4
The figure is a sectional view showing the state of the hose tip according to the present invention. 1... Materials, 2... Mixer, 3...
... Mortar feeder, 4 ... Filling hole, 5
...Hose, 6...Container, 7...
... Upper lid, 8 ... Detection rod, 9 ... Pressure plate, 10 ... Outer peripheral surface of pressure plate, 11 ...
・Mortar, 12...Hose, 13...
・Conical inner surface, 14... Hose outlet, 15...
...Air supply hose, 16...Mixer

Claims (1)

[Scope of utility model registration request] In the mortar feeder used in the rock bolt construction method, in which bolts are inserted after filling mortar into filling holes drilled in the ground, and the bolts and the ground are integrated by solidification of the mortar, A cylindrical container for accommodating a filled amount of mortar and an upper lid for sealing the container are provided, and a detection rod is provided inside the container and slidably penetrates the center of the upper lid, and the lower end of the detection rod is connected to the container. A pressurizing plate having a diameter slightly smaller than the inner diameter of the container and pressurizing the mortar in the container is provided, a hose for filling the mortar is connected to the lower end of the container, its tip is cut at an arbitrary point in the longitudinal direction, and the pressurizing plate is When almost the entire amount of mortar is discharged by settling, the outer peripheral surface of the pressurizing plate closes with the conical inner surface of the lower end of the container, and the compressed air is passed through the hose to prevent it from blowing out from the hose outlet. mortar feeder.