JP7553053B2 - Connection jig for fixing material injection hose in anchor or rock bolt construction - Google Patents

Description

This invention relates to a connection jig for an anchoring material injection hose in anchor or rock bolt construction, which allows a hose for injecting an anchoring material such as cement milk to be quickly, easily and reliably connected to an injection pipe when filling gaps between holes excavated in the ground and inserted material (anchoring work).

Previously, the main method for injecting fixing materials for anchor and rock bolt construction was to manually push a hose from the injection plant into the hole opening from the anchor buried underground, and then tighten and connect it with wire, etc.

A connection method using metal hose joints is also used, but this requires the use of connection tools such as wires to connect to the hose, and there have been cases of serious accidents, such as the joint coming loose due to insufficient tightening or the hose breaking due to over-tightening.

All of the above connection methods involve linear fastening of the joints, and when fixing the hoses in anchor or rock bolt installations, which require high injection pressure, uneven pressure is applied to the connections, posing a risk of hose damage or being pulled out.

This work is carried out at outside temperatures, and in particularly cold regions, the hose loses its elasticity and flexibility, making it difficult to join hoses together or to insert the hose into metal joints.

In addition, when attaching or detaching the wires or hoses themselves had to be cut, which could make them impossible to reuse, and there was a risk of pressurized injection material spraying out when cut.

Therefore, even in the past, there existed a connection tool for connecting a supply hose and a supply pipe, in which a portion of the length of a metallic cylindrical body is cut out along the axial direction and in the radial direction, a semicircular lid corresponding to the cut out portion is connected via a hinge so as to be freely opened and closed, a tightening lever handle is connected to the body opposite the hinge so as to be freely rotatable, and a tapered protrusion is provided on the top surface of the semicircular lid (Patent Document 1).

The configuration of Patent Document 1 above has the effect of allowing various supply hoses for liquids, gases, etc. to be connected to supply pipes simply and reliably without using metal wires called "wires" or tools for fastening the wires.

JP 2004-69001 A

However, in Patent Document 1, the friction between the cylindrical body that holds the hose and the lid is weak, so the tightening force is not necessarily perfect, and although the hose is tightened by horizontally rotating a lever handle on a tapered protrusion on the top surface of the lid, the tightening force tends to gradually decrease with use. Therefore, it is necessary to prevent this kind of decrease in tightening force.

The first aspect of the present invention is a connection jig for an anchoring material injection hose in anchor or rock bolt construction, which is made up of an anchoring material injection pipe section, a cylindrical guide pipe section, and an open-close guide pipe section, and the open-close guide pipe section is made slightly larger than the outer diameter of the connecting hose, making it easy to connect even if the hose is deformed or bent.

The second aspect of the present invention is a connection jig for an anchorage injection hose in anchor or rock bolt construction according to the first invention, in which a threaded section is provided inside the openable guide tube section, so that the hose will not come off even when injection pressure is applied due to frictional resistance.

The third aspect of the present invention is a connecting jig for a fixing material injection hose in anchoring or rock bolting work according to the first or second invention, in which the openable guide tube section is made up of a pair of upper and lower semicircular tube sections, and the upper and lower halves are joined together and clamped with screws to hold and secure the hose, applying a uniform force and preventing the hose from being pulled out or damaged due to uneven pressure.

The fourth aspect of the present invention is a connection jig for an anchoring material injection hose in anchoring or rock bolting work according to the first invention, in which the size of the base of the bolt tightening part of the openable guide tube part is made larger for the upper base than for the lower base, making it easy to attach and detach the connection hose by simply loosening the bolt slightly and pushing up the upper base with a finger.

The present invention has the above-mentioned configuration and thus has the following effects.
First, since the openable/closable guide tube portion is made larger in outer diameter than the connection hose, connection is easy even if the hose is deformed or bent.

Secondly, by providing a threaded section inside the openable guide tube, the strong frictional resistance prevents the hose from coming loose or shifting even when injection pressure is applied.

Thirdly, the openable guide tube section secures the hose by clamping it with bolts between two semicircular tubes, preventing the hose from being pulled out or damaged due to uneven pressure.

Fourth, the size of the edge of the upper base of the bolt tightening part of the openable guide tube is made larger than the edge of the lower base, so that the connecting hose can be easily removed by simply loosening the tightening bolt slightly and pushing up the upper base with a finger.

Fifth, it allows safe and easy injection of fixing materials such as cement milk in anchor and rock bolt construction.

FIG. 1 is a perspective view of an open/close guide tube portion of a connecting jig for an anchoring material injection hose in anchoring or rock bolting work according to the present invention in an open state. 2 is a perspective view of the openable/closable guide tube portion of FIG. 1 in a closed state. FIG. FIG. 3 is an end view of FIG. 2 . FIG. 3 is a central cross-sectional view of FIG. 2 . FIG. 13 is a perspective view of a state in which a hose is attached to a guide tube portion.

The present invention is made up of a metal injection tube, a guide tube, and an open-close guide tube with a threaded section, and the threaded section inside the open-close guide tube prevents the connection hose from coming off even when the injection pressure of the fixing material is applied due to frictional resistance. The open-close guide tube is made larger than the outer diameter of the connection hose, making it easy to connect to the connection hose even if the connection hose is deformed or bent, and a pair of upper and lower pedestals are provided on the open-close guide tube, with the edge of the upper pedestal made larger than the edge of the lower pedestal, so that the connection hose can be easily attached and detached by slightly loosening the pedestal tightening bolts and pushing up the upper pedestal with a finger.

In Fig. 1, 1 is an injection pipe for an anchoring agent, the end of which is connected to a supply pump P by an injection hose H', and which mainly supplies cement milk. 2 is a cylindrical guide pipe connected to the injection pipe 1, into which the base of the hose H is inserted.
Reference numeral 3 denotes an openable guide tube portion, which is divided in two in the diametrical direction into an upper half portion 3a and a lower half portion 3b, and a threaded portion 4 is formed on the inner diameter surface. The threaded portion 4 prevents the hose H from slipping or coming off the guide tube portion 3 due to the supply pressure of a fixing material such as cement when the hose tip is held by the openable tube portion 3. Reference numeral 5 denotes a base provided on the openable guide tube portion 3, and the edge 5a' of the upper base 5a is larger than the edge 5b' of the lower base 5b by a width w that allows a finger to be placed over it. The bases of the upper and lower bases 5a and 5b are fixed to the upper and lower halves 3a and 3b of the guide tube portion 3 by welding, respectively.

Reference numeral 6 denotes a hinge secured by welding so that the pair of upper and lower halves 3a and 3b of the openable guide tube 3 can be opened and closed, and reference numeral 7 denotes a screw hole drilled in the lower base 5b. If a nut made of a separate material is welded to the underside of the lower base 5b as shown in Fig. 3, the screw hole 7 drilled in the lower base 5b can be used as a bolt hole. Reference numeral 8 denotes a bolt hole drilled in the upper base 5a, and reference numeral 9 denotes a bolt with a lever handle 9' for passing through the bolt hole 8 and screwing it into the screw hole 7 for tightening. In the figure, reference numeral H denotes a hose whose end is held by the outer tube 3 (3a, 3b) and tightened by the bolt 9.

[Specific assembly example]
In the jig of the present invention, the total length L = 195.47 mm is obtained by combining the lengths La = 90.47 mm of the metal fixing material injection tube portion 1, Lb = 45.00 mm of the cylindrical guide tube portion 2, and Lc = 60.00 mm of the open-close guide tube portion 3, and the diameter of the hose H is available in two types, 21.5 mm or 17 mm.

Next, the upper half 3a of the openable guide tube 3 is opened and the end of the hose H is inserted into the concave arc section of the lower half 3b, and the tip of the hose H is fitted into the cylindrical section. The upper half 3a of the openable guide tube is then closed to hold the hose H, and the lever handle 9' is rotated to tighten the bolt 9, increasing the frictional force against the hose H by the inner diameter threaded section 4 of the openable guide tube 3, firmly holding it and preventing it from being pulled out.

When the lever handle 9' is loosened in the release direction in this connected state, the upper half 5a of the base 5 opens relative to the injection tube 1, and the end of the hose H can be removed from the openable guide tube 3.

[Work process example]
(1) First, a pump P for pumping out the grout material is installed in the plant where the grout material is mixed.
(2) Next, the end of the injection pipe portion 1 of the jig is connected to the injection hose H' extending from the pump P.
(3) The tip of the injection hose H coming out of the anchor material or the like that has been inserted into the drilled hole is connected to the open/close guide tube portion 3 of the jig.
(4) Once the connection of the injection hose H is complete, pump P is used to pump in the injection material.

1...Fixing material injection tube section 2...Cylindrical guide tube section 3...Open-close guide tube section 3a...Upper half of open-close guide tube section 3b...Lower half of open-close guide tube section 4...Threaded section 5...Base 5a...Upper base 5a'...Edge of upper base 5b...Lower base 5b'...Edge of lower base 6...Hinge 7...Screw hole 8...Bolt through hole 9...Tightening bolt 9'...Lever handle H...Hose H'...Pump side hose P...Pump

Claims (3)

The device is comprised of an injection pipe portion (1) for the fixing material, a cylindrical guide pipe portion (2), and a threaded openable/closable guide pipe portion (3),
The inner diameter of the openable/closable guide tube portion ( 3 ) is made larger than the outer diameter of the connecting hose (H),
A pair of upper and lower pedestals (5a) and (5b) are provided on the openable guide tube portion (3), and the edge (5a') of the upper pedestal (5a) is made larger than the edge (5a') of the lower pedestal (5b),
Even if the connecting hose (H) is deformed or bent, the connecting hose (H) can be easily connected to the connecting hose (H) ,
This connecting jig for a fixing material injection hose in anchor or rock bolt construction is characterized in that the connecting hose (H) can be easily attached and detached by simply loosening the base tightening bolt (9) slightly and pushing up the upper base (5a ) with a finger. 2. The connecting jig for a fixing material injection hose in anchoring or rock bolting work as claimed in claim 1 , wherein a threaded portion (4) is provided inside the open-close type guide pipe portion (3) so that the connecting hose (H) will not come off even when injection pressure is applied due to frictional resistance. The connecting jig for a fixing material injection hose in anchoring or rock bolting work according to claim 1 or 2, wherein the openable guide pipe portion ( 3 ) is composed of a pair of upper and lower semicircular pipe portions ( 3a ) and ( 3b ), and the upper and lower semicircular pipe portions are brought together and sandwiched with a threaded portion (4) to fix the connecting hose (H), thereby applying a uniform force and preventing the hose from being pulled out or damaged due to uneven pressure.

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