JP6159129B2 - Rod changer for drilling machine - Google Patents

Description

  The present invention relates to a drilling machine such as a fan-cut drill that drills a long hole in a peripheral wall of a tunnel or a tunnel, in particular, when equipped with this type of drilling machine, when drilling a long hole, The present invention relates to a rod exchange device for adding and collecting rods.

Conventionally, in order to open a blast hole for producing minerals in a mine or to drill a long hole for draining water, a drifter mounted on a guide shell and a guide shell have been used. A drilling machine such as a fan cut drill provided with a rod exchange device arranged in parallel is used.
In this type of drilling machine, a shank rod is inserted into a drifter, and a rod having a predetermined length is connected to the shank rod via a sleeve or the like. A bit is attached to the tip of the connected rod, and the impact and rotation are transmitted from the drifter to the bit, and a feed mechanism is fed to the drifter to make a desired hole in the rock.
Here, when performing a long hole drilling hole whose length is longer than that of the rod, a rod exchanging device is used in the middle of the drilling hole (see, for example, Patent Document 1).

  This type of rod exchanging device has a bracket 131 attached to a guide shell (not shown), and a magazine 140 is provided on the bracket 131, as shown in FIG. The magazine 140 has a rod receiving groove 143 formed over the entire circumference of the magazine 140, and the ends of the plurality of rods 50 can be received in the rod receiving groove 143. Further, a set plate 124 is provided so as to face the rod receiving groove 143 of the magazine 140. A large number of rod support grooves 123 are radially formed on the periphery of the set plate 124 at equal intervals. The set plate 124 supports both front and rear ends of the rod 50 so that the rod 50 is equally arranged in the circumferential direction of the magazine 140 by its own rod support groove 123. This type of rod exchanging device is provided with a rod holding device (not shown). The rod holding device has a tooth for holding the rod in the magazine and a tooth opening / closing mechanism, and stores the rod in the magazine. The position can be rotated to a position on the drill axis.

  When adding rods using this type of rod changer, the set plate is rotated, the rod is removed from the magazine storing a plurality of rods at the rod storage position by the rod holding device, and the The rod can be moved to the position of, and the rod can be added using the rotation and feed mechanism of the drifter. The removed rod can be separated again and collected in the magazine.

JP 2003-184472 A

  However, the conventional rod exchanging device has a structure in which a magazine stores a plurality of rods in a rod receiving groove formed over the entire circumference of the magazine itself. It is limited to the number that can be evenly distributed in the circumferential direction of the magazine. For this reason, there are cases where the number of storages does not reach the number of rods necessary for digging a long hole. If the number of retractable rods does not reach the required number of rods, the rods must be carried by human power, and the holes of the drifter side and rods must be added manually by human hands. Similarly, at the time of collecting the rod, there is a problem that a rod that cannot be accommodated in the magazine of the rod exchange device must be collected by human hands.

  Accordingly, the present invention has been made paying attention to such problems, and provides a drill exchanging rod exchanging device that can increase the number of rods that can be accommodated in a magazine of the rod exchanging device. The purpose is to do.

In order to solve the above-mentioned problems, a rod exchanging device for a drilling machine according to the first aspect of the present invention is used in a drilling machine and is disposed in a guide shell on which a drifter is mounted. A pair of magazines that house both ends of a plurality of rods in rod housing grooves formed along the circumferential direction of the plurality of rods, and a circumferential direction of the magazine that is provided to face the rod housing grooves of the pair of magazines And a pair of set plates having a plurality of rod support grooves for supporting both ends of the rod so as to distribute the plurality of rods equally, and the rod receiving groove of the magazine is a rod in two stages in the radial direction of the magazine Is formed in a double spiral shape in which a first spiral portion on the radially outer side and a second spiral portion on the radially inner side are continuous, and the set plate includes the plurality of Rod As Jimizo, so that it can support the rod in two stages in a radial direction of the set plate, the first rod support groove formed to a depth corresponding to the first spiral portion, the second helical portion And a second rod support groove formed at a depth corresponding to the above.

According to the rod exchanging device according to the first aspect, the rod receiving groove of the magazine can store the rod in two stages in the radial direction of the magazine, and the first spiral portion on the radially outer side and the radially inner side Since the second spiral portion is formed in a double spiral shape, the trajectory of the rod accommodated in the magazine is spiral, and the first spiral portion and the second spiral portion are in two stages. The rod can be stored on top of each other.

The set plate has at least a rod support groove formed at a depth corresponding to the second spiral portion so that the rod can be supported in two stages in the radial direction of the set plate among the plurality of rod support grooves. Since it has, it can support the rod of the 1st, 2nd spiral part, respectively. Therefore, while the conventional rod exchange device can store the rod only for one turn in the circumferential direction of the magazine, the rod exchange device according to the first aspect stores the rod that can be accommodated in the magazine. The number can be increased. Therefore, while the conventional rod exchange device can store the rod only for one turn in the circumferential direction of the magazine, the rod exchange device according to the first aspect stores the rod that can be accommodated in the magazine. The number can be increased.

In particular, according to the rod exchange device according to the first aspect, the set plate has a first rod support groove formed at a depth corresponding to the first spiral portion and a depth corresponding to the second spiral portion. because and a second rod support groove formed in the in the range of occupied area with limited set plate, preferably on the first, many supports as possible second helical portion of the rod, respectively It is.
Here, with respect to the spiral shape of the rod receiving groove, if a shear is accumulated in the rod receiving groove having a spiral structure, there is a possibility that the rod exchange device may malfunction, in particular, a rod formed in a double spiral shape. In the case of the accommodation groove, there is a problem that it takes time to discharge the accumulated shear from the rod accommodation groove.

On the other hand , the rod exchanging device according to the second aspect of the present invention is a rod exchanging device used in a drilling machine and disposed in a guide shell on which a drifter is mounted. A pair of magazines that house both ends in rod housing grooves formed along the circumferential direction of the magazines, and the plurality of rods are arranged in the circumferential direction of the magazine so as to face the rod housing grooves of the pair of magazines. And a pair of set plates having a plurality of rod support grooves for supporting both ends of the rod, and the rod receiving groove of the magazine is arranged in a radial direction so that the rod can be stored in two stages in the radial direction of the magazine. The outer first spiral portion and the radially inner second spiral portion are formed in a double spiral shape, and the set plate is a set of the plurality of rod support grooves. Pre As the rod in two stages in a radial direction of the bets can be supported, at least the second rod support groove formed to a depth corresponding to the spiral portion, the rod receiving groove, the spiral shape plate member is formed by, that the plate member being supported relative to the bracket by a plurality of pillar portions, the plurality of pillar portions between each other, a gap is provided by the pillar portion mutually adjacent spaced apart It is characterized by.
Secondly by the rod switching apparatus according to an aspect of the lever, on which it is possible to increase the storage number capable of accommodating rods in the magazine of the rod changer, pillar portion for supporting the plate portion forming a spiral relative to the bracket Since the adjacent column parts are separated from each other and a gap is provided, it is difficult for the shear to be accumulated in the rod housing groove, and further, it is possible to improve the shear discharge performance from the rod housing groove. For this reason, even when a slip enters between the stored rod and the magazine, it is possible to prevent or suppress an operation failure caused by the slip being sandwiched between the magazine and the rod.

  As described above, according to the present invention, the number of rods that can be accommodated in the magazine of the rod exchange device can be increased.

It is a side view of the fan cut drill which is one Embodiment of the drilling machine provided with the rod exchange apparatus which concerns on 1 aspect of this invention. It is a figure explaining one Embodiment of the rod exchange apparatus which concerns on 1 aspect of this invention, The figure (a) is the top view (plan view of FIG.2 (b)), (b) is shown in FIG. It is the elements on larger scale of a rod exchange apparatus (this part is rotated 90 degree | times and is shown in figure). It is a figure explaining a magazine and a rod holding device part, the figure (a) is a figure in the state where the rod holding device has located the center position of a rod in the storing position of a magazine, and (b) is a state where a rod holding device is a rod. It is a figure of the state which is located in the position on the hole axis line in which the center position of is drilled. It is a figure explaining one Embodiment of the rod exchange apparatus which concerns on 1 aspect of this invention, The figure (a) is A arrow directional view of FIG. 2, (b) is a ZZ cross section in the figure (a). FIG. It is a figure explaining 1st embodiment of the magazine part of the rod exchange apparatus which concerns on 1 aspect of this invention, The figure (a) is a B arrow view in FIG.4 (b), (b) is (a). ) Is a bottom view, (c) is a right side view of (a), (d) is a sectional view taken along line XX in (a), and (e) is a perspective view. It is a figure explaining 2nd embodiment of the magazine part of the rod exchange apparatus which concerns on 1 aspect of this invention, The figure (a) is a B arrow view in FIG.4 (b), (b) is (a). ) Is a bottom view, (c) is a right side view of (a), and (d) is an XX cross-sectional view of (a). It is a figure explaining an example of the conventional rod exchange apparatus, The figure has shown the figure corresponding to FIG.

Hereinafter, an embodiment of the present invention will be described with reference to the drawings as appropriate.
As shown in FIG. 1, this drilling machine 1 is a fan cut drill used for drilling work in tunnel construction or the like, and a carriage 10 having traveling wheels 7 and 8 and an outrigger 9 in front and rear of the vehicle. It has. In the carriage 10, the front vehicle body 2 and the rear vehicle body 3 are formed separately, and the front and rear vehicle bodies 2 and 3 are connected to each other by a connecting shaft 6 so as to be swingable in the left-right direction. The front vehicle body 2 is provided with a drilling device 20, and the rear vehicle body 3 is provided with an operation unit 4 and a drive unit 5 for driving and performing necessary drilling operations.

  The drilling device 20 has a tilt boom 12 that is tilted back and forth by a tilt cylinder 11 at the front end of the carriage 10. The tilt boom 12 is pivotally attached to the base end of a swing arm 13 that swings left and right (in the direction of the drawing in the drawing). A swing mechanism 14 that rotates 360 ° is provided at the tip of the swing arm 13. A guide shell 16 is supported on a surface of the turning mechanism 14 facing the front of the vehicle via a guide mounting 15, and a drifter 17 is mounted on the guide shell 16. The drifter 17 is moved in the front-rear direction (left-right direction in FIG. 2B) along the guide shell 16 by a known feed mechanism.

  A shank rod 18 is inserted into the drifter 17. A rod (50 (see FIG. 2)) of a predetermined length is connected to the tip of the shank rod 18 via a sleeve or the like, and a bit (not shown) is attached to the tip of the rod. Further, a foot pad 19 and a centralizer 21 are provided at the distal end portion of the guide shell 16, and the centralizer 21 supports the distal end portion of the rod 50 on the hole axis line. At the time of drilling, the guide shell 16 is positioned by the operation of the tilt boom 12, the swing arm 13, and the turning mechanism 14, the impact and rotation are transmitted from the drifter 17 to the bit via the rod 50, and the drifter 17 is transmitted by the feed mechanism. Drilling into the bedrock is done by feeding to the rock.

  Here, as shown in FIG. 2, the drilling machine 1 is provided with a rod changer 30 (rod changer) 30 on the side of the guide shell 16, so that the required drilling length of the rod 50. If it is longer than the length, the rod 50 can be added and recovered during the drilling operation.

  Specifically, the rod exchanging device 30 includes a pair of brackets 31 that are separated from each other in the front and rear directions of the guide shell 16. The pair of brackets 31 are provided with a pair of magazines 40 for holding both ends of the plurality of rods 50 on opposite sides of each other. A magazine shaft 32 parallel to the guide shell 16 is coaxially arranged between the pair of magazines 40, and the front end side of the magazine shaft 32 is formed in a magazine shaft support groove 49 formed at the center of the magazine 40 facing the front end side. The magazine shaft 32 is rotatably supported, and the magazine shaft 32 penetrates the other magazine 40 so that both ends of the magazine shaft 32 are pivotally supported by the pair of brackets 31. A set plate 24 is attached to the magazine shaft 32 at a position facing each of the pair of magazines 40 so as to rotate together with the magazine shaft 32. On the proximal end side of the magazine shaft 32, a magazine motor 22 that provides rotation to the magazine shaft 32 is provided.

  A pair of front and rear carrier arms 28 are pivotally supported on the pair of brackets 31 by pins 27 (see FIG. 3). The pair of carrier arms 28 are connected by a carrier shaft 35 parallel to the guide shell 16 and can be rotated around the pin 27 by expansion and contraction of the carrier arm cylinder 29. On the carrier shaft 35, a pair of rod holding devices (rod carriers) 36 that are spaced apart from each other before and after the guide shell 16 and the axial load that the rod holding device 36 receives from the feed mechanism of the drifter 17 and the like are alleviated. A load relaxation mechanism 37 is provided. The rod holding device 36 can be rotated around the carrier shaft 35 by expansion and contraction of the clamp arm cylinder 38.

  As shown in FIG. 3, the rod holding device 36 includes a tooth 39 for holding the rod 50 at the tip. The tooth 39 is opened and closed by expansion and contraction of a holding cylinder (clamp cylinder) 51 so that the rod 50 to be added or recovered can be gripped and released. The rod holding device 36 has a retracted position of the rod 50 in the magazine 40 shown in FIG. 3 (a) and a position shown in FIG. 3 (b) by expansion and contraction of the carrier arm cylinder 29 and the clamp arm cylinder 38. The center position of the rod 50 can be moved to a position on the drill axis for adding and collecting the rod 50.

  As shown in FIGS. 4 and 5, each magazine 40 described above has an opening 41 formed in the upper part of the magazine 40 corresponding to the storage position. Since the pair of magazines 40 are formed symmetrically except for the structure of the support portion of the magazine shaft 32 described above, in the following description, the magazine 40 positioned on the tip side of the magazine shaft 32 is illustrated. For the magazine 40 on the proximal end side of the magazine shaft 32, detailed illustration and description thereof are omitted.

  In the magazine 40, a rod guide surface 42 for smoothly guiding the front and rear ends of the rod 50 held by the rod holding device 36 to the rod receiving groove 43 of the magazine 40 is formed in the opening 41. Here, the rod accommodating groove 43 is formed so as to accommodate both ends of the plurality of rods along the circumferential direction of the rod. In particular, the rod accommodating groove 43 of the magazine 40 of the present embodiment is the radial direction of the magazine 40. The first spiral portion 44 on the radially outer side and the second spiral portion 45 on the radially inner side are continuously formed in a double spiral shape so that the rod can be retracted in two stages.

  A slide surface 48 is formed at a portion connecting the first spiral portion 44 and the second spiral portion 45 so that the accommodated rod 50 can be smoothly guided. The first spiral portion 44 is formed concentrically with the center of the magazine 40 (the magazine shaft support groove 49) except for a portion where the inner and outer wall surfaces of the groove forming the spiral portion are connected to the second spiral portion 45. Has been. The second spiral portion 45 is formed concentrically with the center of the magazine 40 (the magazine shaft support groove 49) because the inner wall surface of the groove forming the spiral portion of the first spiral portion 44 is its own outer wall surface. In addition, the inner circumferential side of the portion is a relief groove in the range up to the thick boss portion that forms the magazine shaft support groove 49.

  In the rod receiving groove 43 of the present embodiment, the double spiral shape is formed by the plate member 46, and the plate member 46 is separated from the substrate surface of the bracket 31 in the axial direction by a plurality of column portions 47. It is supported. A gap D is provided between the plurality of column portions 47 along the circumferential direction by separating the adjacent column portions 47 from each other.

  On the other hand, as shown in FIG. 4A, the set plate 24 is a disk-shaped member in which 16 rod support grooves 23 are formed radially at equal intervals on the periphery thereof. Each rod support groove 23 is a groove having a width substantially the same as that of the rod 50 and having a bottom having an arc shape. In particular, the plurality of rod support grooves 23 of the set plate 24 of the present embodiment are formed at a depth corresponding to the first spiral portion 44 so that the rod 50 can be supported in two stages in the radial direction of the set plate 24. The first rod support grooves 25 having a shallow depth and the second rod support grooves 26 having a deep depth corresponding to the second spiral portion 45 are alternately provided in the circumferential direction.

  When the magazine shaft 32 is rotationally driven, the set plate 24 rotates integrally with the set plate 24 and presses the rod 50 in the circumferential direction by the wall surface of its own rod support groove 23. As a result, the rod 50 moves along the spiral of the rod receiving groove 43 on the magazine 40 side. At this time, since the first spiral portion 44 of the magazine 40 is formed concentrically with the center of the magazine 40 (the magazine shaft support groove 49) except for the portion connected to the second spiral portion 45, it is the same as the conventional magazine. It becomes the operation. On the other hand, the rod 50 positioned in the second spiral portion 45 is held at a deep position of the second rod support groove 26 having a deep depth formed corresponding to the second spiral portion 45. . When the rod 50 held in the deep position of the second rod support groove 26 moves to a portion connected to the first spiral portion 44 by the rotation of the set plate 24, the first spiral portion 44 and the second spiral portion 44 Since the slide surface 48 capable of smoothly guiding the rod 50 is formed at the portion connecting the spiral portion 45, the slide surface 48 functions as a cam surface. As a result, the rod 50 held in the deep position of the second rod support groove 26 of the set plate 24 is smoothly guided to the shallow position of the second rod support groove 26, and the second spiral portion 45. To the first spiral portion 44.

Next, drilling work in the drilling machine 1 will be described.
When drilling is performed by the drilling machine 1, the guide shell 16 of the drilling device 20 is moved to the drilling position, and the drifter 17 is driven to perform drilling. When the required drilling length is longer than the length of the rod 50, the rod 50 is drilled by the rod exchanging device 30 after the rod 50 is drilled.
The rod 50 is added by the rod exchange device 30 in the following procedure.

First, the drifter 17 is blanked and the screw at the connecting portion between the shank rod 18 of the drifter 17 and the rear end of the rod 50 is loosened. Next, the front rod 50 is clamped by the centralizer 21, the drifter 17 is reversed, and the screw at the connecting portion between the shank rod 18 and the rear rod 50 is disconnected. Thereafter, the drifter 17 is moved backward on the guide shell 16.
Next, by driving the magazine motor 22 and rotating the magazine shaft 32, the set plate 24 is moved to position the rod 50 to be added to the storage position of the magazine 40 and the rod holding device 36 to the storage position of the magazine 40. Move to.

  The rod 50 is gripped by the tooth 39 by extending the holding cylinder 51, the clamp arm cylinder 38 is extended, the rod 50 thus gripped is taken out from the magazine 40, and the carrier arm cylinder 29 is extended to rotate the carrier arm 28. By moving the rod 50, the rod 50 is moved on the drill axis that is a connection point between the drifter 17 and the shank rod 18. When the rod 50 to be added is positioned on the drill axis, the drifter 17 is rotated forward to connect the shank rod 18 and the screw at the rear end of the rod 50, and the holding cylinder 51 of the tooth 39 is slightly reduced. The rod 50 is held so as to be rotatable, and the screw at the front end of the rear rod 50 is connected to the screw at the rear end of the front rod 50. After the rod 50 is connected, the tooth 39 is opened and the carrier arm 28 is rotated to return to the retracted position.

  When the drilling hole is formed again to reach a predetermined drilling hole length, the rod 50 is recovered by the reverse movement to the above. To collect the rod 50, first, the drifter 17 is used to perform the idle driving, and the screw at the connecting portion of the rod 50 is loosened. Next, the drifter 17 is retracted by a distance corresponding to one rod 50. Next, the tooth 39 is moved on the hole axis line to hold the rear rod 50. Next, the drifter 17 is rotated slightly forward so that the screw of the shank rod 18 is lightly tightened. Next, the holding cylinder 51 is slightly extended, and the rear rod 50 is held by the tooth 39 so as to be rotatable (half clamp). ) And the rear end portion of the front rod 50 is clamped by the centralizer 21. Next, the drifter 17 is reversed and retracted, and the screw at the front end of the rear rod 50 is separated from the rear end of the front rod 50. Next, alignment is performed by the forward and backward movement of the drifter 17, and the rear rod 50 is firmly held by the rod holding device 36. Next, the drifter 17 is reversed and the shank rod 18 is separated from the rear end of the rear rod 50. When the detachment is made, the drifter 17 is retracted, and then the carrier arm 28 is rotated to retract the rod 50 from the hole axis line. When the rod 50 is received in the magazine 40, the holding cylinder 51 is contracted to remove the rod from the tooth 39. 50 is released, the magazine motor 22 is driven and the magazine shaft 32 is rotated to move the set plate 24, whereby the rod 50 is stored in the magazine 40 and the collection is completed. This is a series of operations.

Next, the function and effect of the rod exchange device 30 will be described.
As shown in the magazine portion of the conventional rod exchanging device in FIG. 7, the conventional rod exchanging device includes a magazine 140 for storing a plurality of rods 50 in a rod receiving groove 143 formed over the entire circumference of the rod itself. The set plate 124 is provided so as to face the rod receiving groove 143 of the magazine 140 and supports the front and rear ends of the rod 50 so as to distribute the rod 50 equally in the circumferential direction of the magazine 140. In other words, the conventional rod exchanging device has a storage structure in which the set plate 124 and the magazine 140 accommodate the rod 50 only for one circumference.

  In contrast, in the rod exchanging device 30 of the present embodiment, the first spiral portion 44 on the radially outer side is arranged so that the rod receiving groove 43 of the magazine 40 can store the rod 50 in two stages in the radial direction of the magazine 40. And the second spiral portion 45 on the radially inner side, and the spiral portions 44 and 45 are formed in a continuous double spiral shape, so that the trajectory of the rod 50 accommodated in the magazine 40 is The rod 50 can be stored in a spiral shape so as to overlap the first spiral portion 44 and the second spiral portion 45. The set plate 24 includes a first rod support groove 25 formed at a depth corresponding to the first spiral portion 44 and a second rod formed at a depth corresponding to the second spiral portion 45. Since the support groove 26 is provided, the rods 50 of the first and second spiral portions 44 and 45 can be supported by the support grooves 25 and 26, respectively.

  The set plate 24 can move the rod 50 along the spiral of the rod receiving groove 43 on the magazine 40 side by pressing the rod 50 in the circumferential direction by the wall surface of its own rod support groove 23. Since the first spiral portion 44 is formed concentrically with the center of the magazine 40 except for the portion connected to the second spiral portion 45, it can operate in the same manner as a conventional magazine. Further, when the rod 50 positioned in the second spiral portion 45 is held at a deep position in the second rod support groove 26, the rod 50 is connected to the portion connected to the first spiral portion 44 by the rotation of the set plate 24. When moved, the first spiral portion 44 and the second spiral portion 45 are continuous, and in particular, the slide surface 48 that connects them functions as a cam surface, so the second rod support groove of the set plate 24 The rod 50 held at the deep position 26 can be smoothly guided to the shallow position of the second rod support groove 26 and moved from the second spiral portion 45 to the first spiral portion 44.

Therefore, the conventional rod exchanging device can only store the rod 50 for one round in the circumferential direction of the magazine 140, whereas the rod exchanging device 30 of the present embodiment sequentially accommodates the rod 50 in the magazine 40. The trajectory of the rod 50 is spiral along the rod receiving groove 43, and the rod 50 can be stored in two stages in the radial direction. Therefore, the number of rods 50 that can be accommodated in the magazine 40 can be increased. As a result, with this rod exchange device 30, more rods 50 can be added without intervention of human hands, so that a longer elongated hole can be drilled.
The rod exchanging device according to the present invention is not limited to the above-described embodiment, and it goes without saying that various modifications can be made without departing from the spirit of the present invention.

  For example, in the set plate 24 of the above embodiment, the plurality of rod support grooves 23 are formed at a depth corresponding to the first spiral portion 44, and the first rod support groove 25 having a shallow depth and the second rod support groove 23 are formed. Although the example which has the 2nd rod support groove | channel 26 with the deep depth formed in the depth corresponding to the spiral part 45 by turns in the circumferential direction was demonstrated, it is not limited to this. That is, if the plurality of rod support grooves 23 of the set plate 24 are configured to support the rod 50 in two stages in the radial direction of the set plate 24, the operational effects of the present invention can be exhibited. It can be set as the structure which has the rod support groove | channel (45) formed in the depth corresponding to the spiral part 45. FIG. However, in effectively using the limited occupation area of the set plate 24 and supporting as many rods 50 of the first and second spiral portions 44 and 45 as possible, as in the above embodiment, It is preferable that the plurality of rod support grooves 23 have the first rod support groove 25 and the second rod support groove 26.

Further, for example, in the magazine 40 of the first embodiment shown in FIG. 5, the rod receiving groove 43 is formed in a spiral shape by a plate member 46, and the plate member 46 is attached to the bracket 31 by a plurality of column portions 47. In contrast, the plurality of column portions 47 are supported by being separated from each other in the axial direction, and a gap D is provided by separating the adjacent column portions 47 from each other, and this gap D functions as a shear discharge port. Although described by way of example, the present invention is not limited to this.
For example, as shown in the second embodiment in FIG. 6, instead of the plurality of column portions 47, a wall surface standing along the axial direction of the rod housing groove 43 of the magazine 40 is formed in a spiral shape of the rod housing groove 43. The bent plate 47 may be manufactured by bending an iron plate along the surface of the bent plate 47, and a cutout D may be formed on the surface of the bent plate 47, and the cutout D may be used as a shear discharge port.

  However, in the second embodiment shown in FIG. 6, the wall surface of the rod receiving groove 43 is manufactured by a bent plate 47 obtained by bending an iron plate, and a cutout D is formed in the bent plate 47 to form a shear discharge port. Compared to the gap D in the rod receiving groove 43 of the magazine 40 shown in the embodiment, the gap for functioning as a shear outlet is relatively reduced. Therefore, in the “shear discharge”, the spiral shape is formed by the plate member 46 as in the magazine 40 of the first embodiment, and the plate member 46 is axially formed with respect to the bracket 31 by the plurality of column portions 47. By supporting them apart from each other, it is possible to increase the gap D by making the structure in which the adjacent column portions 47 are separated from each other to provide the gap D, and it becomes difficult for the shear to accumulate, and it is easier to discharge the shear. Become. Therefore, it is suitable for improving the shear discharge performance.

DESCRIPTION OF SYMBOLS 1 Drilling machine 2 Front side vehicle body 3 Rear side vehicle body 4 Operation part 5 Drive part 6 Connection shaft 7, 8 Wheel 9 Outrigger 10 Carriage 11 Tilt cylinder 12 Tilt boom 13 Swing arm 14 Turning mechanism 15 Guide mounting 16 Guide shell 17 Drifter 18 Shank rod 19 Foot pad 20 Drilling device 21 Centralizer 22 Magazine motor 23 Rod support groove 24 Set plate 25 First rod support groove 26 Second rod support groove 27 Pin 28 Carrier arm 29 Carrier arm cylinder 30 Rod exchange device (Rod changer)
31 Bracket 32 Magazine shaft 35 Carrier shaft 36 Rod holding device (rod carrier)
37 Load relaxation mechanism 38 Clamp arm cylinder 39 Tooth 40 Magazine 41 Opening portion 42 Rod guide surface 43 Rod receiving groove 44 First spiral portion 45 Second spiral portion 46 Plate member 47 Column portion 48 Slide surface 50 Rod 51 Holding cylinder (Clamp cylinder)

Claims (3)

A rod exchange device used in a drilling machine and disposed in a guide shell on which a drifter is mounted,
A pair of magazines that house both ends of the plurality of rods in rod housing grooves formed along the circumferential direction of the plurality of rods, and the plurality of rods that are provided facing the rod housing grooves of the pair of magazines in the circumferential direction of the magazines. A pair of set plates having a plurality of rod support grooves for supporting both ends of the rod so as to distribute the rods equally;
The magazine's rod receiving groove has two first spiral portions that are radially outer and second spiral portions that are radially inner so that the rod can be stored in two stages in the radial direction of the magazine. It is formed in a heavy spiral shape,
The set plate, as the plurality of rod support groove, so that it can support the rod in two stages in a radial direction of the set plate, the first rod support which is formed to a depth corresponding to the first spiral portion A rod exchanging device for a drilling machine , comprising a groove and a second rod support groove formed at a depth corresponding to the second spiral portion . A rod exchange device used in a drilling machine and disposed in a guide shell on which a drifter is mounted,
A pair of magazines that house both ends of the plurality of rods in rod housing grooves formed along the circumferential direction of the plurality of rods, and the plurality of rods that are provided facing the rod housing grooves of the pair of magazines in the circumferential direction of the magazines. A pair of set plates having a plurality of rod support grooves for supporting both ends of the rod so as to distribute the rods equally;
The magazine's rod receiving groove has two first spiral portions that are radially outer and second spiral portions that are radially inner so that the rod can be stored in two stages in the radial direction of the magazine. It is formed in a heavy spiral shape,
The set plate has a rod support groove formed at a depth corresponding to at least the second spiral portion so that the rod can be supported in two stages in the radial direction of the set plate among the plurality of rod support grooves. Have
The rod-receiving groove has the spiral shape formed by a plate member, and the plate member is supported with respect to the bracket by a plurality of column portions, and the adjacent column portions are adjacent to each other between the plurality of column portions. A rod exchanging device for a drilling machine , characterized in that a gap is provided by separating them . The rod-receiving groove has the spiral shape formed by a plate member, and the plate member is supported with respect to the bracket by a plurality of column portions, and the adjacent column portions are adjacent to each other between the plurality of column portions. The rod exchanging device for a drilling machine according to claim 1 , wherein a gap is provided by separating them.

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