Trailer wire retrieval device, trailer wire retrieval system, and trailer wire retrieval method

Abstract

The present invention provides a wire retrieval device that can safely and smoothly retrieve the wires extending from the main die loaded into the object to be blasted. [Solution] The blast wire recovery device 5 recovers the blast wires 86 extending from the master die 83 loaded into the blasting target object 80. The blast wire recovery device 5 comprises a rod-shaped shaft member 10 and an attachment mechanism 11 including an attachment member 13 provided at the tip of the shaft member 10. The attachment member 13 (for example, a permanent magnet) can attach to the object to be attached 30 (for example, a ferromagnetic material) attached to the blast wire 86 by contacting or approaching the object to be attached 30.

Description

Technical Field

[0001] The present invention relates to a detonator wire recovery device, a detonator wire recovery system, and a detonator wire recovery method for recovering a detonator wire extending from a main detonator loaded in a blasting target object.

Background Art

[0002] For example, at the face of tunnel excavation, explosives are loaded into the loading holes formed in the blasting target object, and the detonator wires extending from the detonators of the explosives are connected to the igniter. The operator approaches the face and directly holds and recovers the plurality of detonator wires one by one, and pulls them to a position where they can be connected to the igniter. However, at the face where the ground is exposed, there is a risk of disasters such as skin peeling (rockfall), so it is preferable for the operator to perform the detonator wire recovery work away from the face. Therefore, a connecting auxiliary tool for pulling the detonator wire (linear member) from a position away from the face has been proposed (Patent Document 1). This connecting auxiliary tool has an engaging portion provided at the tip of a shaft portion that can be expanded and contracted in the axial direction. The operator extends the shaft portion to hook the engaging portion on the detonator wire, and then reels in the detonator wire by contracting the shaft portion.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in the above-described technology, for example, when the detonator wire is in contact with the face, it may be impossible to insert the engaging portion (hook) between the face and the detonator wire, and it may be difficult to hook the engaging portion (hook) on the detonator wire. That is, in the above-described technology, the detonator wire may not be smoothly recovered.

[0005] In consideration of the above circumstances, the present invention provides a leg wire recovery device, a leg wire recovery system, and a leg wire recovery method that can safely and smoothly recover the leg wires extending from the master die loaded into the object to be blasted. [Means for solving the problem]

[0006] The present invention relates to a leg wire recovery device for recovering a leg wire extending from a master die loaded into an object to be blasted, comprising a rod-shaped shaft member and an adhesion mechanism including an adhesion member provided at the tip of the shaft member, wherein the adhesion member can adhere to an object to be attached by contacting or approaching the object to be attached to the leg wire.

[0007] In this case, the object to be attached may include either a ferromagnetic material or a permanent magnet, and the attachment member may include the other of either the ferromagnetic material or the permanent magnet.

[0008] In other cases, the object to be attached may include either the loop portion or the hook portion of the hook-and-loop fastener, and the attachment member may include the other of the loop portion or the hook portion of the hook-and-loop fastener.

[0009] In other cases, the object to be attached may be formed in a fin shape extending radially outward from the leg line, and the attachment mechanism may have an attachment member including a suction port for drawing in air, and a suction force generating unit that applies a suction force to the object to be attached via the suction port.

[0010] The trailing wire recovery system according to the present invention comprises one of the above-described trailing wire recovery devices and a sorting tool for holding the trailing wires recovered using the trailing wire recovery device, wherein multiple types of master dies are loaded into the blasting target with a time difference in the explosion time, and multiple trailing wires extending from the multiple types of master dies are fitted with the attached objects, each of which differs in color, shape, and size, for each type of master die, and the sorting tool holds the trailing wires sorted according to the type of master die.

[0011] The present invention relates to a leg wire retrieval method for retrieving a leg wire using the leg wire retrieval system described above, comprising: an attachment step of extending the rod member, bringing the attachment member close to the leg wire, and attaching the object to be attached to the leg wire to the attachment member; a retrieval step of pulling back the rod member, pulling in the leg wire attached to the attachment member via the object to be attached, and separating the object to be attached from the attachment member; and a sorting step of separating the pulled-in leg wires according to the type of the master die and holding them in the sorting tool. [Effects of the Invention]

[0012] According to the present invention, the lead wires extending from the main die loaded into the object to be blasted can be safely and smoothly recovered. [Brief explanation of the drawing]

[0013] [Figure 1] This is a perspective view showing a leg wire recovery system and tunnel face, etc., according to the first embodiment of the present invention. [Figure 2] This is a three-view drawing (plan view, front view, and side view) showing the leg wire recovery device of the leg wire recovery system according to the first embodiment of the present invention. [Figure 3] This is a perspective view showing a sorting tool for a leg wire recovery system according to the first embodiment of the present invention. [Figure 4] This is a flowchart showing a leg wire recovery method according to the first embodiment of the present invention. [Figure 5] This is a side view illustrating the attachment process of the leg wire recovery method according to the first embodiment of the present invention. [Figure 6] This is a side view illustrating the recovery process of the leg wire recovery method according to the first embodiment of the present invention. [Figure 7] This is a side view illustrating the sorting process of the leg wire recovery method according to the first embodiment of the present invention. [Figure 8] This is a side view showing a leg line recovery system and a tunnel face, etc., according to a second embodiment of the present invention. [Figure 9] This is a three-view drawing (plan view, front view, and side view) showing the leg wire recovery device of the leg wire recovery system according to the third embodiment of the present invention. [Figure 10] It is a cross-sectional view taken along the line X-X of FIG. 9. [Figure 11] It is a side view showing a leg wire recovery system and a face etc. according to the third embodiment of the present invention.

Embodiments for Carrying Out the Invention

[0014] Hereinafter, an embodiment of the present invention will be described while referring to the attached drawings. Note that Fr, Rr, L, R, U, and D shown in the drawings indicate front, rear, left, right, up, and down. Also, the front-rear direction, left-right direction, and up-down direction are orthogonal to each other. In this specification, terms indicating directions and positions are used, but these terms are used for convenience of explanation and do not limit the technical scope of the present invention. Also, the shapes and dimensions of the members shown in each drawing are not necessarily accurate and are schematized in consideration of facilitating explanation.

[0015] [First Embodiment: Leg Wire Recovery System] Referring to FIG. 1, the leg wire recovery system 1 according to the first embodiment will be described. FIG. 1 is a perspective view showing the leg wire recovery system 1 and a face etc.

[0016] The leg wire recovery system 1 is used, for example, in a construction for blasting a blasting target 80 to excavate a tunnel. The blasting target 80 is, for example, a rock mass (ground) including a face 81 of a tunnel construction. In the blasting target 80, a plurality of charging holes 82 are drilled from the face 81 forward, and the charging ports of the plurality of charging holes 82 are opened in the face 81.

[0017] In each charging hole 82, a main charge 83, an additional charge 8�, and a stemming 85 are loaded in this order (see FIG. 5 etc. described later). The main charge 83 is a charge (explosive (not shown)) with a detonator (not shown) attached thereto and has a leg wire 86 extending from the detonator. The additional charge 84 is a charge without a detonator, and the stemming 85 is sand, clay, etc.

[0018] The leg wires 86 of each main die 83 extend outward from the loading port of the loading hole 82 and hang down along the working face 81. Multiple leg wires 86 are connected to an electric blaster (not shown), which detonates each main die 83 by energizing the primers via the leg wires 86. Multiple loading holes 82 (objects to be blasted 80) are loaded with, for example, multiple types (e.g., three types) of main dies 83 with time differences in their explosion times. The multiple types of main dies 83 are arranged on the object to be blasted 80 so that they detonate sequentially at predetermined time intervals, for example, from near the center of the working face 81 outward in the radial direction.

[0019] As will be explained in more detail later, before the loading of the main die 83, an attachment 30 is detachably attached to each leg wire 86. Each attachment 30 is, for example, a double clip made of a ferromagnetic material such as steel, and is attached by pinching the tab and opening the clip to clamp the leg wire 86. Although not clear from the drawing, the multiple attachments 30 are grouped according to the type of main die 83 and colored with a color assigned to each type of main die 83 (each group). In other words, the multiple attachments 30 are color-coded in three colors according to, for example, three types of main die 83. Multiple attachments 30 of different colors are attached to multiple leg wires 86 extending from multiple types of main die 83, according to the type of main die 83.

[0020] The detonator of the main die 83 described above was a so-called electric detonator, but it is not limited to this. For example, a fuse-type detonator that is detonated by the flame of a fuse, or a non-electric detonator that is detonated by sending a shock wave through a plastic tube, may also be used. In these cases, the fuse or plastic tube, for example, is an example of a leg wire 86. Furthermore, the object to be attached 30 may be formed entirely of a ferromagnetic material, but it is not limited to this, and only a part of the object to be attached 30 may be formed of a ferromagnetic material.

[0021] Next, the wire retrieval system 1 will be described in detail with reference to Figures 1 to 3. Figure 2 is a three-view drawing (plan view, front view, and side view) of the wire retrieval device 5 of the wire retrieval system 1. Figure 3 is a perspective view of the sorting device 9 of the wire retrieval system 1.

[0022] As shown in Figure 1, the detonator wire recovery system 1 comprises a detonator wire recovery device 5 and a sorting tool 9. The detonator wire recovery device 5 recovers the detonator wires 86 extending from the main die 83 (detonator) loaded into the blasting target 80 (loading hole 82). The sorting tool 9 holds the detonator wires 86 recovered using the detonator wire recovery device 5.

[0023] [First Embodiment: Leg Wire Recovery Device] As shown in Figure 2, the leg wire recovery device 5 according to the first embodiment comprises a rod member 10 and an adhesion mechanism 11.

[0024] <Stand member> The rod member 10 is made of a lightweight material such as synthetic resin and is formed in the shape of a rod with a circular cross-section. The rod member 10 is a member that is gripped by the worker 90. The rod member 10 is preferably formed to a length of 1 m or more and 3 m or less. In addition, a non-slip grip made of synthetic resin (not shown) may be placed over the base end side of the rod member 10 (the side opposite to the tip where the attachment mechanism 11 is provided) to make it easier for the worker 90 to grip.

[0025] <Adhesion Mechanism> The adhesion mechanism 11 includes an adhesion support member 12 and an adhesion member 13.

[0026] (Adhesive support member) The adhesive support member 12 is made of a lightweight material such as synthetic resin and is formed in a block shape that extends along the radial direction (left-right direction in Figure 2) of the shaft member 10. More specifically, the adhesive support member 12 is formed in a roughly elliptical column shape with rounded ends of a rectangular parallelepiped that is elongated in the radial direction. The adhesive support member 12 is provided at the tip of the shaft member 10. More specifically, the tip of the shaft member 10 is fixed to the center of the back surface (base end surface) of the adhesive support member 12 when viewed from the back. The adhesive support member 12 may be made of a hard synthetic resin, or it may be made of an elastically deformable synthetic resin such as urethane, rubber, or sponge.

[0027] (Adhesive member) The attachment member 13 is a permanent magnet that can adhere to the object to be attached 30, which contains a ferromagnetic material, by contacting or approaching the object to be attached 30. The attachment member 13 is a permanent magnet such as an Alnico magnet, a ferrite magnet, or a neodymium magnet. The attachment member 13 is formed in the shape of a plate that extends along the radial direction (left-right direction in Figure 2) of the shaft member 10. In detail, the attachment member 13 is formed in the shape of a substantially elliptical plate that is slightly smaller than the front surface (tip surface) of the attachment support member 12. The attachment member 13 is fixed to the front surface of the attachment support member 12 and is provided at the tip of the shaft member 10 via the attachment support member 12. Since the attachment member 13 is formed in the shape of a plate that is sufficiently wide in the width direction (left-right direction) of the face 81, multiple objects to be attached 30 can be attached to the attachment member 13.

[0028] [Separation tool] As shown in Figure 3, the sorting device 9 has a main body box 20 made of synthetic resin and formed in the shape of a rectangular parallelepiped, and a plurality (for example, six) sorting grooves 21 formed on the upper part of the main body box 20. The plurality of sorting grooves 21 are formed at equal intervals in the left-right direction in the main body box 20. Each sorting groove 21 is a slit that is cut downward from the top surface of the main body box 20 to about half the height of the main body box 20, and has openings on the top surface, front and back of the main body box 20. The leg wires 86 collected by the leg wire collection device 5 enter each sorting groove 21.

[0029] Furthermore, similar to the multiple objects to be attached 30 to the leg wire 86, the six sorting grooves 21 are grouped according to the type of master die 83. Specifically, the six sorting grooves 21 are divided into three groups, with two adjacent sorting grooves 21 in the left-right direction forming one group. On the back and front of the main box 20, labels 22 colored with a color assigned to each type of master die 83 are affixed between the two sorting grooves 21 that make up each group (in Figure 3, the colors are shown as dots). The labels 22 may also be affixed to the top surface of the main box 20 (not shown).

[0030] [Leg line recovery method] Next, with reference to Figures 4 to 7, a method for recovering the trailing wires 86 using the trailing wire recovery system 1 according to the first embodiment, that is, a method for using the trailing wire recovery system 1, will be described. Figure 4 is a flowchart of the trailing wire recovery method. Figure 5 is a side view illustrating the adhesion process S1 of the trailing wire recovery method. Figure 6 is a side view illustrating the recovery process S2 of the trailing wire recovery method. Figure 7 is a side view illustrating the sorting process S3 of the trailing wire recovery method.

[0031] Before implementing the leg wire retrieval method, the worker 90 performs the following steps. Before loading each main die 83 into the loading hole 82, the worker 90 attaches a different colored adhesive 30 to the leg wire 86 extending from each main die 83 (detonator) (see also Figure 1). The adhesive 30 should be attached to the portion of the leg wire 86 that is exposed from the loading opening of the loading hole 82, but preferably it should be attached to a position on the leg wire 86 approximately 1 to 3 m away from the loading opening. Next, the worker 90 loads the main die 83 and extension die 84 into each loading hole 82 of the object to be blasted 80 and seals each loading hole 82 with packing material 85 (see also Figure 5). In this state, each leg wire 86 hangs down from the loading opening of the loading hole 82, and each attached object 30 is attached to the hanging leg wire 86 (see Figure 5, etc.).

[0032] Next, worker 90 performs the retrieval of the stud wire 86 (stud wire retrieval method). Here, in this specification, worker 90 is assumed to be riding in a basket 92 provided at the tip of the boom 91 of the high-altitude worker and performing the retrieval of the stud wire 86 (see also Figure 1). The sorting tool 9 is assumed to be fixed to the handrail portion 93 of the basket 92 (see Figure 5, etc.). Furthermore, worker 90 is assumed to be approximately 1 to 3 m behind the face 81. Note that worker 90 may also perform the retrieval of the stud wire 86 in an upright position on the ground (not shown). In this case, the sorting tool 9 may be placed on the ground or on a work platform installed on the ground (neither is shown).

[0033] As shown in Figure 4, the leg wire recovery method comprises an adhesion step S1, a recovery step S2, and a separation step S3.

[0034] <Adhesion Process> As shown in Figure 5, in the attachment process S1, the worker 90 grasps the base end (rear side) of the rod member 10 of the leg wire retrieval device 5 and directs the attachment mechanism 11 toward the face 81. In the attachment process S1, the worker 90 extends the rod member 10 forward, bringing the attachment member 13 closer to the leg wire 86, and attaches the object to be attached 30 attached to the leg wire 86 to the attachment member 13. Since the attachment member 13 is made of a permanent magnet, by lightly touching or approaching the steel object to be attached 30, the object to be attached 30 is magnetically attracted (adsorbed). In Figure 5, etc., one object to be attached 30 is attached to the attachment member 13, but the present invention is not limited to this. The worker 90 may swing the rod member 10 in the up and down and left and right directions to move the attachment member 13 in the up and down and left and right directions, and attach multiple objects to be attached 30 to the attachment member 13 (not shown).

[0035] <Recovery Process> Next, as shown in Figure 6, in the recovery process S2, the worker 90 pulls back the rod member 10 and pulls in the leg wire 86 that is attached to the adhesive member 13 via the attached object 30. Then, the worker 90 separates the attached object 30 from the adhesive member 13.

[0036] <Separation process> Next, as shown in Figure 7, in the sorting process S3, the worker 90 separates the hand-pulled leg wires 86 according to the type of master die 83 and holds them in the sorting tool 9. Specifically, the worker 90 visually confirms the color of the object to be attached 30 and inserts the leg wire 86 into the sorting groove 21 which has a label 22 of the same color as the object to be attached 30. As a result, the sorting tool 9 holds the leg wires 86 separated according to the type of master die 83 (see also Figure 3). It is preferable to position the object to be attached 30 on the back side of the sorting tool 9 (main box 20) (see also Figure 3).

[0037] The worker 90 repeatedly performs the adhesion process S1, recovery process S2, and sorting process S3 described above until all the trailing wires 86 (attached objects 30) loaded onto the blasting target 80 are recovered (NO in step S4 shown in Figure 4). The trailing wire recovery operation (trailing wire recovery method) is completed when all the trailing wires 86 are recovered (YES in step S4 shown in Figure 4).

[0038] After the retrieval of the lead wires 86 is completed, the worker 90 takes out each lead wire 86 held in the sorting tool 9, connects them according to the type of master die 83, and connects them to the electric blaster (not shown). In this connection work, the worker 90 grasps the tab portion of each attached object 30 to open the clip portion and removes each attached object 30 from the lead wire 86 (not shown). This makes it possible to reuse the attached objects 30.

[0039] In the first embodiment of the truing wire retrieval device 5 described above, the attachment member 13 of the attachment mechanism 11 is provided at the tip of a rod-shaped shaft member 10 and is configured to attach to the object to be attached 30 attached to the truing wire 86. Specifically, the attachment member 13 is composed of a permanent magnet that magnetically attracts the object to be attached 30, which is made of steel, by lightly contacting or approaching the object to be attached 30. With this configuration, for example, even if the truing wire 86 is in contact with the working face 81 and the truing wire 86 cannot be hooked with a hook or the like, the worker 90 can easily attach the object to be attached 30 to the attachment member 13 from a position away from the working face 81. As a result, the worker 90 can pull in the truing wire 86 via the object to be attached 30 attached to the attachment member 13 without approaching the working face 81, and thus the truing wire 86 can be retrieved safely and smoothly.

[0040] Furthermore, according to the lead wire recovery system 1 (lead wire recovery method) of the first embodiment, since the colors of the multiple attached objects 30 differ according to the type of master die 83, the worker 90 can use the color of the attached objects 30 as a guide to separate the lead wires 86 according to the type of master die 83. In addition, the worker 90 can have the separated lead wires 86 for each type of master die 83 held in the sorting tool 9 (see Figure 3). This makes it possible to connect the lead wires 86 to the electric blaster according to the type of master die 83, so that the connection work after the recovery of the lead wires 86 can be performed efficiently.

[0041] In the lead wire retrieval device 5 according to the first embodiment, the object to be attached 30 was a double clip and was detachably attached to the lead wire 86, but the present invention is not limited thereto. For example, other objects to be attached may be formed in a sleeve shape from a ferromagnetic material such as steel and fixed in close contact with the outer surface of the lead wire 86 (not shown). In other words, the object to be attached may be configured to be indestructibly attached to the lead wire 86 (not shown).

[0042] Furthermore, in the leg wire recovery device 5 according to the first embodiment, the object to be attached 30 was a ferromagnetic material and the attachment member 13 was a permanent magnet, but the present invention is not limited thereto. For example, the object to be attached 30 may be a permanent magnet and the attachment member 13 may be a ferromagnetic material (such as an iron plate) (not shown). Also, for example, both the object to be attached 30 and the attachment member 13 may be permanent magnets (not shown).

[0043] Furthermore, in the leg wire retrieval device 5 according to the first embodiment, the attachment member 13 was formed in the shape of a single plate, but the present invention is not limited thereto. For example, as other attachment members, a plurality of permanent magnets may be arranged in a line on the front surface of the attachment support member 12, or they may be arranged in a grid or staggered pattern (none of which are shown). Also, because the working face 81 has irregularities, in order to facilitate contact between the attachment member and the leg wire 86 (object to be attached 30) that has entered into the recesses, one permanent magnet may be formed in the shape of a semi-cylindrical column that protrudes forward, or a plurality of permanent magnets may be formed in the shape of a hemisphere (none of which are shown).

[0044] [Second Embodiment: Leg Wire Recovery System (Leg Wire Recovery Device)] Referring to Figure 8, the trailing wire recovery device 6 of the trailing wire recovery system 2 according to the second embodiment will be described. Figure 8 is a side view showing the trailing wire recovery system 2 and the working face 81, etc. In the description of the trailing wire recovery system 2 (trailing wire recovery device 6) according to the second embodiment, the same reference numerals are used for components similar to those in the trailing wire recovery system 1 (trailing wire recovery device 5) according to the first embodiment described above, and similar descriptions are omitted.

[0045] In the leg wire recovery device 6 according to the second embodiment, the adhesive member 14 of the adhesive mechanism 11 includes the loop surface portion of a hook-and-loop fastener. The adhesive member 14 (loop surface portion) is made of densely packed loop-shaped synthetic fibers that have been brushed on a sheet. Similar to the adhesive member 13 described above, the adhesive member 14 is formed in a substantially elliptical shape that is slightly smaller than the front surface of the adhesive support member 12 and is fixed (attached) to the front surface of the adhesive support member 12.

[0046] The attached object 31 to the leg wire 86 includes the hook portion of a hook-and-loop fastener that attaches to the attachment member 14 (loop portion). The attached object 31 (hook portion) is made of densely packed hook-shaped synthetic fibers that have been brushed on a sheet and is wrapped around the leg wire 86. In addition, multiple attached objects 31 are color-coded according to the type of master die 83. The attached objects 31 may be attached to the leg wire 86 in a detachable manner or in a non-detachable manner.

[0047] The method for recovering the leg wires 86 using the leg wire recovery system 2 according to the second embodiment is the same as the method for recovering the leg wires according to the first embodiment, in which the worker 90 lightly brings the adhesive member 14 into contact with the object to be attached 31 of the leg wire 86 and uses the function of the hook and loop fastener to attach the object to be attached 31 to the adhesive member 14 (adhesion step S1). After that, the worker 90 pulls back the rod member 10, pulls the leg wire 86 closer, separates the object to be attached 31 attached to the adhesive member 14 (recovery step S2), and holds the leg wires 86 in the sorting tool 9 while sorting them according to the type of master die 83 (sorting step S3).

[0048] According to the second embodiment of the thread retrieval device 6 described above, since the object to be attached 31 and the attachment member 14 are hook-and-loop fasteners, the object to be attached 31 can be attached to the attachment member 14 by lightly bringing the attachment member 14 into contact with the object to be attached 31. As a result, the worker 90 can easily retrieve the thread 86 even when away from the working face 81, and thus obtain the same effects as the thread retrieval device 5 according to the first embodiment, such as the safe and smooth retrieval of the thread 86.

[0049] In the leg wire recovery device 6 according to the second embodiment, the attachment member 14 was a loop surface and the object to be attached 31 was a hook surface. However, the device is not limited to this configuration, and the attachment member 14 may be a hook surface and the object to be attached 31 may be a loop surface.

[0050] In the leg wire recovery devices 5 and 6 according to the first and second embodiments, the rod member 10 was formed in the shape of a single rod, but the present invention is not limited thereto. The rod member 10 may be formed, for example, by connecting several (about two to three) short rods, or it may be formed in a nesting type that can be extended and retracted in multiple stages (neither shown). Furthermore, the rod member 10 is not limited to being made of synthetic resin, but may be made of wood, metal, or a combination of various materials. The rod member 10 is not limited to being a rod with a circular cross-section, but may be formed in the shape of a rod with a polygonal cross-section, such as a rectangular cross-section (not shown).

[0051] Furthermore, in the leg wire recovery devices 5 and 6 according to the first and second embodiments, the adhesive members 13 and 14 were provided at the tip of the rod member 10 via the adhesive support member 12, but the present invention is not limited thereto. For example, the adhesive support member 12 may be omitted, and the adhesive members 13 and 14 may be directly fixed to the tip of the rod member 10 (not shown). In this case, it is preferable to form the sheet of the adhesive member 14 from a highly rigid material.

[0052] Furthermore, in the leg wire recovery devices 5 and 6 according to the first and second embodiments, the adhesive members 13 and 14 were formed in a plate shape that was long in the left-right direction, but the present invention is not limited thereto. The shape and size (area) of the adhesive members 13 and 14 can be freely changed, and for example, the adhesive members 13 and 14 may be formed to have the same shape and area as the tip surface of the rod member 10 (not shown).

[0053] [Third Embodiment: Leg Wire Recovery System (Leg Wire Recovery Device)] The trailing wire recovery device 7 of the trailing wire recovery system 3 according to the third embodiment will be described with reference to Figures 9 to 11. Figure 9 is a three-view drawing (plan view, front view, and side view) of the trailing wire recovery device 7 of the trailing wire recovery system 3. Figure 10 is a cross-sectional view of XX in Figure 9. Figure 11 is a side view showing the trailing wire recovery system 3 and the working face 81, etc. In the description of the trailing wire recovery system 3 (trailing wire recovery device 7) according to the third embodiment, the same reference numerals are used for components similar to those in the trailing wire recovery system 1 (trailing wire recovery device 5) according to the first embodiment described above, and similar descriptions are omitted.

[0054] As shown in Figures 9 and 10, the leg wire recovery device 7 according to the third embodiment comprises a rod member 40 and an adhesion mechanism 50.

[0055] <Stand member> The rod member 40 has a first rod portion 41 that is held by the worker 90, and a second rod portion 42 that is connected to the tip side (front side) of the first rod portion 41. The first rod portion 41 and the second rod portion 42 are each made of synthetic resin and are formed in the shape of a hollow pipe. A first flow path 43 is formed inside the first rod portion 41, and a second flow path 44 is formed inside the second rod portion 42 (see Figure 10). A fitting portion 41A is formed at the tip of the first rod portion 41, which has a larger diameter than the rest of the rod. The base end (rear end) of the second rod portion 42 is narrowed to have a smaller diameter than the rest of the rod (see Figure 10). The rear side of the second rod portion 42 fits inside the fitting portion 41A, and the first flow path 43 and the second flow path 44 are in communication (see Figure 10). A communication channel 45 is formed in the gap between the inner circumferential surface of the fitting portion 41A and the rear outer circumferential surface of the second rod portion 42, and communicates with the first flow channel 43 (see Figure 10). A compressed air supply pipe 46 protrudes radially outward from the fitting portion 41A, and communicates with the communication channel 45.

[0056] <Adhesion Mechanism> The attachment mechanism 50 includes an attachment member 51 connected to the tip (front end) of the second rod portion 42, and a suction force generating portion 52 connected to the compressed air supply pipe 46 of the first rod portion 41 via a supply tube 54.

[0057] (Adhesive member) The attachment member 51 is formed in a hollow cylindrical shape that extends along the radial direction (left-right direction in Figures 9 and 10) of the second rod portion 42. The tip of the second rod portion 42 is fixed to the center of the attachment member 51 in the left-right direction. Multiple indentations are formed on the tip surface of the attachment member 51, and an air intake port 53 for drawing in air opens in each indentation. Each air intake port 53 is formed in a slit shape to prevent the leg wires 86 from being sucked into the attachment member 51. Each indentation is designed so that the sucked-in leg wires 86 can fit into it.

[0058] (Suction force generating part) The suction force generating unit 52 is, for example, an air compression device (compressed air source) installed at a tunnel construction site. The suction force generating unit 52 circulates compressed air from the communication passage 45 to the first passage 43 through the compressed air supply pipe 46 (see the solid arrow in Figure 10). The compressed air is released to the outside from the base end opening of the first rod section 41. When compressed air circulates in the first passage 43, etc., a negative pressure is created inside the first passage 43, causing the air inside the attachment member 51 and the second passage 44 to be drawn towards the first passage 43 (see the dashed arrow in Figure 10). As a result, outside air is drawn in through the multiple suction ports 53 opened in the attachment member 51. In this way, the suction force generating unit 52 works in cooperation with the multiple passages 43-45, the compressed air supply pipe 46, and the multiple suction ports 53, etc., to form an ejector. It may also be considered that the compressed air source, multiple flow paths 43-45, compressed air supply pipe 46, and multiple suction ports 53 constitute the suction force generating unit 52.

[0059] The object to be attached 32 to the leg wire 86 is, for example, an adhesive tape, with a portion attached to the leg wire 86, forming a fin-like (or flag-like) shape extending radially outward from the leg wire 86 (see Figure 11). In addition, multiple objects to be attached 32 are color-coded according to the type of parent die 83.

[0060] The leg wire recovery method for recovering the leg wire 86 using the leg wire recovery system 3 according to the third embodiment is generally the same as the leg wire recovery method according to the first embodiment. As shown in Figure 11, the operator 90 drives the suction force generating unit 52, extends the rod member 40 forward, and brings the adhesion member 51 into light contact with or close to the object 32 to which the leg wire 86 is attached (adhesion step S1). The suction force generating unit 52 applies suction force to the object 32 to which it is attached via each suction port 53, so the object 32 is attracted to the adhesion member 51 (each suction port 53) (adhesion step S1). After that, the operator 90 pulls back the rod member 40, pulls the leg wire 86 closer, separates the object 32 attached to the adhesion member 51 (recovery step S2), and holds the leg wire 86 in the sorting tool 9 while sorting it according to the type of master die 83 (sorting step S3).

[0061] In the third embodiment of the wire retrieval device 7 described above, the adhesion mechanism 50 is configured to apply suction force to the object to be attached 32 through the suction port 53 of the adhesion member 51 provided at the tip of the rod member 40. With this configuration, by lightly contacting or bringing close the adhesion member 51 to the object to be attached 32 of the wire 86, the object to be attached 32 can be attracted to the adhesion member 51. As a result, the worker 90 can easily retrieve the wire 86 even when away from the working face 81, and thus obtain the same effects as the wire retrieval device 5 of the first embodiment, such as the safe and smooth retrieval of the wire 86.

[0062] In the leg wire recovery device 7 according to the third embodiment, the suction force generating unit 52 was a compressed air source that constituted part of the ejector, but it is not limited to this, and may be a suction pump or the like (not shown). If a suction pump is used as the suction force generating unit, the rod member 10 of the leg wire recovery device 5 of the first embodiment may be used instead of the hollow pipe-shaped rod member 40, and the suction tube may be directly connected to the attachment member 51 (not shown).

[0063] Furthermore, in the leg wire recovery device 7 according to the third embodiment, the rod member 40 was made of synthetic resin, but it is not limited to this and may be made of metal or a combination of various materials.

[0064] Furthermore, in the leg wire recovery device 7 according to the third embodiment, a plurality of suction ports 53 were formed in the adhesive member 51, but the shape and number of suction ports 53 can be freely changed. Also, although the adhesive member 51 was formed in a cylindrical shape that was long in the left-right direction, the present invention is not limited to this. The shape and size of the adhesive member 51 can be freely changed, and for example, the tip of the rod member 40 (second rod portion 42) may also be used as the adhesive member 51 (not shown).

[0065] In the first and second embodiment leg wire retrieval devices 5 and 6, the adhesive support member 12 is fixed to the tip of the rod member 10, and in the third embodiment leg wire retrieval device 7, the adhesive member 51 is fixed to the tip of the rod member 40 (second rod section 42). However, the device is not limited to these, and the adhesive support member 12 and the adhesive member 51 may be rotatably (swivelable) connected to the tips of the rod members 10 and 40 (not shown).

[0066] Furthermore, in the leg wire recovery systems 1 to 3 (leg wire recovery methods) according to the first to third embodiments, the color of the attached objects 30 to 32 differed depending on the type of parent die 83, but the present invention is not limited thereto. For example, the shape or size of the attached objects 30 to 32 may differ depending on the type of parent die 83 (neither of which are shown). Also, any two of the color, shape, and size of the attached objects 30 to 32 may differ for each type of parent die 83, or all of the color, shape, and size of the attached objects 30 to 32 may differ for each type of parent die 83 (neither of which are shown).

[0067] Furthermore, the truss wire recovery systems 1 to 3 (truss wire recovery methods) according to the first to third embodiments were used, for example, in tunnel excavation work, but are not limited to this and can be applied to various construction works that require blasting of blastable materials such as bedrock.

[0068] The above description of embodiments illustrates one aspect of the leg wire recovery device, leg wire recovery system, and leg wire recovery method according to the present invention, and the technical scope of the present invention is not limited to the above embodiments. The present invention may be modified, substituted, or transformed in various ways without departing from the spirit of the technical idea, and the claims include all embodiments that may fall within the scope of the technical idea. [Explanation of Symbols]

[0069] 1,2,3 Leg wire retrieval system 5,6,7 Leg wire recovery device 9 Sorting tools 10,40 Rod parts 11.50 Adhesion mechanism 13,14,51 Adhesive members 30,31,32 Adherent 52 Suction force generating unit 53 Suction port 80. Objects to be blasted 83 Parent 86 Leg line S1 Adhesion process S2 Recovery Process S3 separation process

Claims

1. A leg wire retrieval device for retrieving the leg wires extending from the main die loaded into the object to be blasted, A rod-shaped shaft member, The device comprises an attachment mechanism including an attachment member provided at the tip of the rod member, The leg wire retrieval device is characterized in that the adhesive member can adhere to the object to be attached to the leg wire by contacting or approaching the object to be attached to the leg wire.

2. The object to be attached includes either a ferromagnetic material or a permanent magnet. The trailing wire recovery device according to claim 1, characterized in that the attachment member includes the other of either the ferromagnetic material or the permanent magnet.

3. The object to be attached includes either the loop portion or the hook portion of the hook fastener, The leg wire retrieval device according to claim 1, characterized in that the attachment member includes the other of either the loop surface portion or the hook surface portion of the hook-and-loop fastener.

4. The attached body is formed in a fin-like shape that extends radially outward from the leg line, The aforementioned adhesion mechanism is The attachment member includes a suction port for drawing in air, The leg wire recovery device according to claim 1, further comprising a suction force generating unit that applies suction force to the object to be attached via the suction port.

5. A trailing wire recovery device according to any one of claims 1 to 4, The device comprises a sorting tool for holding the leg wires recovered using the leg wire recovery device, Multiple types of the aforementioned master dies, with time differences between them in the time of explosion, are loaded into the object to be blasted. Multiple leg wires extending from multiple types of the parent die are fitted with the attached objects, each of which differs in color, shape, and size, for each type of parent die. The aforementioned sorting device is characterized by holding the leg wires that have been sorted according to the type of master die, and is a leg wire recovery system.

6. A method for recovering a trailing wire using the trailing wire recovery system described in claim 5, The process involves extending the rod member, bringing the attachment member closer to the leg line, and attaching the object to be attached, which is attached to the leg line, to the attachment member. A recovery step of pulling back the rod member, pulling in the leg wire attached to the attachment member via the attached object, and separating the attached object attached to the attachment member, A method for recovering leg wires, comprising a sorting step of separating the leg wires that have been pulled in according to the type of the main die and holding them in the sorting tool.

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