Anchor tendon insertion device

Abstract

To quickly and reliably cast anchor tendons.SOLUTION: An anchor tendon insertion device 100, which inserts an anchor tendon 310 into a borehole 411, comprises a work deck 110 having a floor 111 with an opening 111a and handrails 112 provided around a floor 111, and a feeding machine 130 which is positioned above the opening 111a on the work deck 110 and feeds the anchor tendon 310 while clamping it.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an anchor tendon insertion device that is used, for example, to drive anchor tendons upward in an underground cavity. [Background technology]

[0002] For example, an anchor tendon insertion device is used to drive anchor tendons upward in a tunnel, etc. This type of device is equipped with a delivery mechanism that clamps and delivers the anchor tendon using a pair of opposing elastic caterpillars, and is attached to the tip of the arm of a hydraulic base machine (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2011-252308 Summary of the Invention [Problem to be solved by the invention]

[0004] When driving a concrete by attaching an anchor tendon delivery mechanism to the end of a base machine arm as described above, the work of inserting the tip of the anchor tendon into a borehole drilled upward must be performed from a distance, for example, from the driver's seat of the base machine away from the borehole or from the ground. This makes it difficult to drive the anchor tendon quickly and reliably.

[0005] The present invention has been made in consideration of the above points, and aims to make it easy to cast anchor tendons quickly and reliably. [Means for solving the problem]

[0006] In order to achieve the above objectives, The present invention provides An anchor tendon insertion device for inserting an anchor tendon into a borehole, a work deck having a floor and handrails provided around the periphery of the floor; an opening provided in the floor portion; a delivery machine disposed above the opening in the work deck and delivering the anchor tendon; The present invention is characterized by the following features.

[0007] By providing the delivery machine on the work deck, it is possible to perform operations such as inserting the tip of the anchor tendon 310 into the borehole close to the wall surface. Therefore, it is easy to cast the anchor tendon quickly and reliably. [Effects of the Invention]

[0008] The present invention makes it easy to cast anchor tendons quickly and reliably. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is an overall view showing an example of the anchor tendon insertion method. [Figure 2] FIG. 2 is a perspective view of the work deck as seen obliquely from below. [Figure 3] FIG. 1 is a front view showing an example of a delivery machine. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings.

[0011] As shown in Figure 1, the anchor tendon insertion device 100 is used to insert an anchor tendon 310 upward or obliquely upward into a borehole 411 drilled in a wall surface 410 such as a rock cavity or the ceiling of a tunnel. The anchor tendon 310 used is, for example, 23 m long and has a maximum weight of 100 kg, and after being inserted into the borehole 411, is fixed with grout so that it can receive anchor force.

[0012] The anchor tendon insertion device 100 is attached to an arm 211 of a vehicle for aerial work 210, for example, so that it can be carried close to a wall surface 410 such as a ceiling. Specifically, as shown in FIG. 2, the anchor tendon insertion device 100 is configured by attaching a sending-out machine 130 (sending-out machine) to a work deck 110 via a platform 120. The work deck 110 is attached to a second end of the arm 211, the first end of which is pivotally supported on a mobile carriage of the vehicle for aerial work 210, and has a floor 111 and handrails 112 provided around the periphery of the floor 111. An opening 111a is formed in the floor 111 through which the anchor tendon 310 is inserted.

[0013] The sending-out machine 130 is provided with two pairs of sending-out rollers 131, 131 that sandwich and send out the anchor tendon 310, as shown in FIG. 3, for example. These sending-out rollers 131, 131 are driven, for example, by a motor (not shown), to pull up the sandwiched anchor tendon 310 from below against gravity and send it upward. The sending-out machine 130 is attached so as to be rotatable in increments of 5° about a rotation shaft 121 provided on a base 120, so that the anchor tendon 310 can be inserted at various angles into various locations on, for example, an arched ceiling wall. Specifically, an example of the sending-out machine 130 described above is one equipped with ball-shaped sending-out rollers 131 filled with air at a predetermined pressure.

[0014] In the anchor tendon insertion device 100 described above, the anchor tendon 310 is inserted into the borehole 411 in the wall surface 410 as follows. First, the arm 211 of the aerial work platform 210 is lowered to bring the work deck 110 close to the ground. Next, a worker on the ground pushes the fixed end of the anchor tendon 310 upward through the opening 111a in the floor 111. Then, a worker on the work deck 110 sequentially pushes the end into the two pairs of feed rollers 131, 131 to clamp it. At this time, if necessary, the portion of the anchor tendon 310 below the feed mechanism 130 may be fixed with a fall prevention grip. Next, while holding the end of the anchor tendon 310, the arm 211 of the aerial work platform 210 is raised to raise the work deck 110 close to the borehole 411. Then, the delivery rollers 131 of the delivery machine 130 are rotated to insert the tip of the anchor tendon 310 into the borehole 411. Once a predetermined length of insertion has been completed, the anchor tendon 310 is fixed in place, for example, by a hole-in anchor and a fall prevention jig separately provided on the wall surface 410, and the anchor tendon insertion device 100 is lowered to the ground.

[0015] As described above, by providing the delivery machine 130, which clamps and delivers the anchor tendon 310, on the work deck, work such as inserting the tip of the anchor tendon 310 into the borehole 411 can be performed close to the wall surface 410. This makes it easy to quickly and reliably cast the anchor tendon 310. In particular, by forming an opening 111a in the floor 111 of the work deck 110 and arranging the delivery machine 130 above the opening 111a, it becomes even easier to clamp the anchor tendon 310 in the delivery machine 130 and perform the insertion operation close to the operator's hand without having to lean over the handrail 112. Furthermore, installation and removal work is easy, reducing work time and improving work efficiency. In addition, the risks of falls, getting caught in the hole, and falling accidents are reduced, improving safety.

[0016] In the above example, the delivery machine 130 is provided with air-filled ball-shaped delivery rollers 131, but this is not limiting, and a device with a pair of opposing endless tracks made of elastic material may also be used. Furthermore, even when delivery rollers 131 are used, the number of sets is not necessarily limited to two, and one set, or three or more sets may also be provided.

[0017] Furthermore, although an example has been shown in which opening 111a is formed near the edge of floor portion 111, it is also possible to position opening 111a on the front side of sending-out machine 130 and opening 111a so that there is space for a worker to stand on either side of opening 111a, thereby making it easier to work in front of sending-out machine 130. [Explanation of symbols]

[0018] 100 Anchorendon Insertion Device 110 Work Deck 111 Floor 111a aperture 112 Handrail 120 Mounting stand 121 Rotating shaft 130 Sending machine 131 Delivery roller 210 Aerial Work Platform 211 Arm 310 Ancon Don 410 Wall 411 Borehole

Claims

1. An anchor tendon insertion device for inserting an anchor tendon into a borehole, comprising: A work deck having a floor and a handrail provided around the periphery of the floor; An opening provided in the floor portion; a delivery machine disposed above the opening in the work deck and adapted to deliver the anchor tendon; An anchor tendon insertion device comprising:

2. 2. The anchor tendon insertion device of claim 1, A mobile cart and an arm pivotally supported on the movable carriage; A first end of the arm is pivotally supported on the movable carriage; The anchor tendon insertion device, wherein the work deck is attached to a second end of the arm.

3. 3. The anchor tendon insertion device according to claim 1 or 2, An anchor tendon insertion device, characterized in that the delivery machine is supported on the work deck and is capable of changing the direction in which the anchor tendon is delivered relative to the work deck.

4. 4. The anchor tendon insertion device of claim 3, The anchor tendon insertion device is characterized in that the sending-out machine is rotatable about a rotation axis provided on a stand supported by the work deck.

5. 5. The anchor tendon insertion device of claim 4, An anchor tendon insertion device, characterized in that a space for an operator to stand is provided in front of the delivery machine within the work deck.

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