JPH0417819Y2 - - Google Patents

Description

[Detailed description of the invention] [Industrial application field] This invention relates to a hand-push mortar pump for injecting mortar into cracks in concrete buildings, floating parts of tile bases, etc.

[Conventional technology and problems]

If cracks or gaps appear in a concrete building or if the tile base becomes loose, it is necessary to fill the cracks or gaps by injecting a grouting agent.

Resin grouting agents, which are commonly used as grouting agents, have good fluidity and can be smoothly extruded using a grease pump.

However, when mortar is used as a grouting agent, extrusion using a grease pump is impossible, and the use of mortar as a grouting agent is currently not practical.

In other words, since mortar is made by adding sand and water to cement and kneading it, the water can be easily separated from the cement and sand, and the mortar can be pressurized using a pump with a large diameter cylinder such as a grease pump. When trying to inject it, only the water flows out first, leaving cement and sand behind, making extrusion impossible because the applied pressure is small.

This invention was made in view of the above points, and the object is to provide a hand-push mortar pump that can extrude mortar smoothly and without any trouble.

[Means for solving problems]

In order to solve the above problems, this invention attaches a piston that slides inside the cylinder to the tip of a rod that enters the cylinder from one end, and attaches and detaches a nozzle to the other end of the cylinder. The nozzle has a small diameter and short tip protruding from the tip of the externally fitted threaded part to the cylinder, and an O is attached to either the outer periphery or the inner periphery in the middle of the tube tip.
It adopts a structure in which a ring is fitted.

[Effect]

After pulling the rod and filling the cylinder with mortar, press the tip of the nozzle directly against a hole drilled in the building to communicate with the crack, or press the tip against a plug inserted into the hole. In this state, push the rod and inject mortar from the tip of the nozzle into the hole.

There is an O-ring on the tip of the nozzle, which prevents the mortar from getting wet, and since the cylinder has a small diameter and the tip of the nozzle is short, it does not get clogged and the mortar can be extruded smoothly.

〔Example〕

Hereinafter, embodiments of this invention will be described based on the accompanying drawings.

As shown in the figure, the pump 1 has a piston 4 attached to the tip of a rod 3 that enters the cylinder 2 from one end, a handle 5 at the rear end of the rod 3, and a nozzle 6 at the other end of the cylinder 2. It is constructed by attaching it detachably.

The cylinder 2 is made of stainless steel and has an inner diameter suitable for extruding mortar, for example, 16 mm to 24 mm, and a cap 7 for preventing the rod 3 from slipping out is attached to one end.

a nozzle 6 attached to the other end of the cylinder 2;
In the case of the first example shown in FIG.
An O-ring 10 is fitted around the outer periphery of the cylinder tip 9, and the outer periphery from the O-ring 10 to the tip is formed with a tapered surface 11 with the tip having a smaller diameter, and the inside of the cylinder tip 9 is formed into a discharge passage. 12 is passing through.

The tip 9 of the nozzle 6 is set to have a protruding length of, for example, about 10 mm to prevent mortar clogging, and the discharge passage 12 has a diameter of about 3 to 4 mm.

In the nozzle 6 of this first example, the tip of the tube tip 9 is directly inserted into the hole B drilled in the wall surface A, and the tip of the tube tip 9 and the hole B are connected to each other.
The fitting portion is sealed with an O-ring 10.

The second example nozzle 6 shown in FIG. 2 is connected to a plug C inserted into a hole B in a wall surface A.
The conditions are approximately the same as those for the nozzle in FIG. An O-ring 13 is attached around the circumference.

Although plug C is not shown, it is provided with a reverse valve inside to prevent the mortar injected toward hole B from flowing backward.

In addition, in order to maintain the fitting portion of each nozzle 6 with the cylinder 2 watertight, a ring-shaped packing 14 is provided.
is incorporated.

The mortar pump of this invention has the above-mentioned configuration, and the rod 3 of the pump 1 with the nozzle 6 attached to the tip is pulled to suck and fill the inside of the cylinder 2 with mortar, and the hole B in the wall surface A is connected to the crack. In the case shown in FIG. 1, the tip 9 of the nozzle 6 can be directly pressed against the hole B and the rod 3 can be pushed in.
It is injected into the hole B from the discharge passage 12 and enters the crack from the hole B.

In the case of FIG. 2, the plug C is driven into the hole B, and the mortar is injected with the cylindrical tip 9 of the nozzle 6 externally connected to the plug C.

〔effect〕

As described above, according to this invention, the extrusion pressure of the mortar is appropriate, and the nozzle is not clogged with mortar, so the mortar can be extruded by hand, preventing cracks in concrete and floating tiles underground. It becomes possible to manually inject and fill mortar into cracks, making it possible to use mortar in cracks. In addition, the nozzle has a small diameter and short tip protruding from the tip of the outer threaded part of the cylinder, and an O-ring is fitted to either the outer circumference or the inner circumference in the middle of this tube tip, so cracks etc. When injecting and filling mortar into the mold, the fitting portion between the tip of the nozzle and the other injection part can be sealed with an O-ring, and mortar can be injected and filled without leakage.

[Brief explanation of drawings]

Figure 1 shows the first mortar pump according to this invention.
FIG. 2 is a vertical cross-sectional view showing the second example. 1 is a pump, 2 is a cylinder, 3 is a rod, 4 is a piston, 6 is a nozzle, 8 is a threaded part, 9 is a cylinder tip,
10 and 13 are O-rings, and 12 is a discharge passage.

Claims (1)

[Scope of utility model registration request] A piston that slides inside the cylinder is attached to the tip of a rod that enters the cylinder from one end, and a nozzle is detachably attached to the other end of the cylinder, and the nozzle is externally screwed into the cylinder. A short tube tip with a small diameter is protruded from the tip of the tube, and an O
A hand-held mortar pump formed by fitting rings.