Installation method for foundation machinery and hose reel unit

Abstract

The present invention provides a foundation machine and a method for installing a hose reel unit that facilitate the installation of the hose reel unit. [Solution] A base machine (1) comprising a rotary drive unit (120) and a hose reel unit (130) attached to the rotary drive unit (120), wherein the rotary drive unit (120) is characterized by comprising an extendable / retractable means (145) whose overall length can be extended or retracted, and guide means (155A, 155B) that guide the hose reel unit (130) to a predetermined position on the rotary drive unit (120) when the extendable / retractable means (145) is extended or retracted while the extendable / retractable means (145) is connected to the hose reel unit (130).

Description

Technical Field

[0001] The present invention relates to a basic machine and a method for attaching a hose reel unit.

Background Art

[0002] As background art in this technical field, for example, Patent Document 1 describes a "hose reel unit attachment / detachment mechanism that attaches and detaches a hose reel unit by inserting and removing coupling pins into a plurality of coupling parts provided in a rotary drive unit and a plurality of coupled parts provided in the hose reel unit."

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in Patent Document 1, during the attachment operation of the hose reel unit, the rotary drive unit may tilt due to the tilt of the basic machine body. Alternatively, when the hose reel unit is placed on the ground, it is affected by the tilt of the ground. Due to these reasons, during the attachment operation, at least one of the rotary drive unit and the hose reel unit may tilt, making it difficult to align the positions of the plurality of coupling parts and coupled parts provided therein and insert the coupling pins. Therefore, the configuration of Patent Document 1 has a problem that it takes time to align the positions during the attachment operation.

[0005] The present invention has been made in view of the above actual situation, and its main object is to provide a basic machine and a method for attaching a hose reel unit that can easily perform the attachment operation of the hose reel unit.

Means for Solving the Problems

[0006] To achieve the above objective, a representative example of the present invention is a basic machine comprising a rotary drive unit and a hose reel unit attached to the rotary drive unit, wherein the rotary drive unit is characterized by comprising an extension / retraction mechanism that allows the overall length to be extended and retracted, and a guide mechanism that guides the hose reel unit to a predetermined position on the rotary drive unit when the extension / retraction mechanism is extended or retracted while the extension / retraction mechanism is connected to the hose reel unit.

[0007] According to the present invention, the installation of the hose reel unit can be easily performed. Furthermore, other problems, configurations, and effects will be clarified by the following description of the embodiments. [Brief explanation of the drawing]

[0008] [Figure 1] This is a side view of a crane according to an embodiment of the present invention. [Figure 2] This is a magnified section of Figure 1. [Figure 3] These are a front view (A) and a side view (B) showing the rotary drive unit with the hose reel unit removed. [Figure 4] This is a magnified view of a portion of Figure 3(B). [Figure 5] This is a front view of the clutch cylinder. [Figure 6] These are a front view (A) and a side view (B) showing the rotary drive unit positioned close to the hose reel unit. [Figure 7] The rotary drive unit is positioned close to the hose reel unit, and the clutch cylinder is in the drive transmission position. These are cross-sectional views (A) along the line A1-A1 in Figure 6(B), and cross-sectional views (B) along the line B1-B1 in Figure 6(A). [Figure 8] Figures 7(A) and 7(B) show a cross-sectional view of the clutch cylinder extended to the mounting position (second position) from the state shown in Figures 7(A) and 7(B). [Figure 9]Figure 9(A) shows a front view of the coupling portion of the rotary drive unit and the area around the coupling portion of the hose reel unit, and Figure 9(A) shows a cross-sectional view along the line B2-B2 (B). [Figure 10] The front view (A) and side view (B) show the clutch cylinder retracted to bring the hose reel unit closer to its predetermined position on the rotary drive unit. [Figure 11] This is a cross-sectional view showing the connection between the rotary drive unit's coupling portion and the hose reel unit's connected portion, and is a cross-sectional view along the lines A3-A3 (A) and B3-B3 (B) in Figure 10(A). [Modes for carrying out the invention]

[0009] Embodiments of the present invention will be described below with reference to the drawings. Figure 1 is a side view of the earth drilling machine 1 (foundation machine) according to this embodiment. Figure 2 is a partially enlarged view of Figure 1.

[0010] (Earth drill machine 1) As shown in Figures 1 and 2, the earth drill machine 1 according to this embodiment is configured to include a main body 10 consisting of a traveling body 2 and a rotating body 3 that is rotatably supported on the traveling body 2, and a boom-type front attachment 100.

[0011] The vehicle 2 moves by rotational drive of a vehicle motor (not shown). The slewing vehicle 3 rotates relative to the vehicle 2 by rotational drive of a slewing motor (not shown). The slewing vehicle 3 mainly consists of a cab 4, a counterweight 5, a rear winch 6, and a front winch 7.

[0012] The cab 4 is provided at the front end of the slewing body 3. An internal space for the operator of the earth drill 1 is formed in the cab 4. Also, although not shown, various operating devices (levers, switches) for operating the earth drill 1 are provided in the internal space of the cab 4. By the operator boarding in the internal space of the cab 4 operating the operating devices, the traveling body 2 travels, the slewing body 3 slews, and the front attachment 100 operates.

[0013] (Front attachment 100) The front attachment 100 is of the boom type and performs excavation work and lifting work according to the operation of the operating device. Instead of the boom type, a leader type front attachment may be used.

[0014] The front attachment 100 includes a boom 110, a front frame 112, a main winding sheave 114, a supplementary winding sheave 115, a main winding rope 116, a supplementary winding rope 117, a rotary drive unit 120, a kelly bar 122, a boom hoisting cylinder 124, a boom telescopic cylinder (not shown), a front frame hoisting cylinder 125, a rotary frame hoisting cylinder 126, a hose reel unit 130, an excavation tool (not shown), and a hook 128.

[0015] The boom 110 is provided on the slewing body 3 so as to be able to rise and fall. In the present embodiment, the boom 110 is of the telescopic boom type, but it may be of the lattice boom type or the like. The boom 110 stands or falls with respect to the slewing body 3 along with the telescopic operation of the boom hoisting cylinder 124.

[0016] The front frame 112 is provided on the boom 110 so as to be able to rise and fall. The front frame 112 can adjust the angle with respect to the boom 110 along with the telescopic operation of the front frame hoisting cylinder 125.

[0017] The rotary drive unit 120 includes a rotary drive 142 (see Fig. 3(A)) described later, and a hydraulic motor 150 that rotationally drives the rotary drive 142. The kelly bar 122 is suspended from the lower end of the main hoist rope 116 that hangs down from the front end of the main hoist sheave 114, and a drilling tool such as a drilling bucket is attached to the tip of the kelly bar 122. The kelly bar 122 penetrates the rotary drive unit 120. The drilling tool excavates the ground when the rotary drive 142 rotationally drives the kelly bar 122.

[0018] (Hose reel unit 130) The hose reel unit 130 is attached to the rotary drive unit 120. The hose reel unit 130 is a device that winds up or pays out a hydraulic hose (not shown) for supplying pressure oil to the drilling tool.

[0019] Figs. 3(A) and 3(B) are a front view and a side view showing the state where the hose reel unit 130 is removed from the rotary drive unit 120, and Fig. 4 is a partially enlarged view of Fig. 3(B). In Figs. 3(A), 3(B), 6(A), 6(B), 10(A), and 10(B), the main body 10, the boom 110, the kelly bar 122, etc. are omitted.

[0020] As shown in Figs. 3(A) and 3(B), the hose reel unit 130 includes a cylindrical housing 132, a hose reel 133, a stand 134, and a hose reel unit side clutch plate 135. A plurality of fitting pins 135A are provided on the upper surface of the hose reel unit side clutch plate 135. The hose reel unit side clutch plate 135 abuts against the lower surface of the rotary drive side clutch plate 140 and the fitting pins 135A fit into fitting holes (not shown) of the rotary drive side clutch plate 140 when the clutch cylinder 145 reaches the drive transmission position described later. Thereby, the rotational drive of the rotary drive 142 is transmitted to the hose reel unit side clutch plate 135.

[0021] A cylindrical housing 132 is attached to the lower surface of the clutch plate 135 on the hose reel unit side, and a stand 134 is attached to the lower surface of the cylindrical housing 132. The Kelly bar 122 passes through the clutch plate 135 on the hose reel unit side, the cylindrical housing 132, and the stand 134.

[0022] The hose reel 133 is mounted on the top surface of the stand 134 and has a hydraulic hose (not shown) wound around it. The hydraulic hose supplies hydraulic fluid to a hydraulic cylinder (not shown) for opening and closing the bottom of the drilling tool. When the hydraulic hose is not connected to the hydraulic cylinder of the drilling tool, it is wound onto the hose reel 133, and when it is connected to the drilling hydraulic cylinder, it is unwound from the hose reel 133. The stand 134 is connected to the hose reel unit side clutch plate 135 via a connecting member (not shown) and moves in conjunction with the hose reel unit side clutch plate 135. When the rotational drive of the rotary drive 142 is transmitted to the hose reel unit side clutch plate 135, the stand 134 and the hose reel 133 rotate.

[0023] The cylindrical housing 132 is integrally provided with first to third coupling portions 136 to 138 and a connecting portion 139. The first coupling portion 136 and the second coupling portion 137 are arranged on both sides of the hose reel unit side clutch plate 135 in the left-right direction and are arranged symmetrically to each other. The third coupling portion 138 is located behind the hose reel unit side clutch plate 135. The connecting portion 139 is located below the first coupling portion 136 and the second coupling portion 137, and inside the first coupling portion 136 and the second coupling portion 137 (towards the hose reel unit side clutch plate 135).

[0024] The first connected portion 136 extends in the vertical direction. The first connected portion 136 is formed in a rectangular tubular shape, through which the clutch cylinder 145 passes. The first connected portion 136 has a through hole 136A. The through hole 136A is an elongated hole that penetrates the first connected portion 136 in the front-to-back direction and extends in the vertical direction. The second connected portion 137 has the same configuration as the first connected portion 136 and is arranged symmetrically, so its description is omitted. The second connected portion 137 also has a through hole 137A. The through hole 137A has the same shape as the through hole 136A of the first connected portion 136 and is arranged symmetrically with the through hole 136A.

[0025] The third connected portion 138 is formed in a plate shape and extends in the vertical direction. The third connected portion 138 has through holes 138A and 138B (see Figure 4). The through holes 138A and 138B are arranged side by side in the vertical direction. The through holes 138A and 138B are elongated holes that penetrate the third connected portion 138 in the left-right direction and extend in the vertical direction.

[0026] The connecting portion 139 is composed of a pair of connecting pieces 139A (see Figure 7(B)) arranged parallel to each other and in parallel in the front-rear direction. The pair of connecting pieces 139A have through holes 139B (see Figure 7(B)). The through holes 139B penetrate the connecting pieces 139A in the front-rear direction. The inner diameter D1 of the through holes 139B is formed to be larger than the outer diameter D2 of the connecting pin 152 (see Figure 8(B)), which will be described later.

[0027] (Rotary drive unit 120) As shown in Figures 3(A) and 3(B), the rotary drive unit 120 comprises a rotary frame 141, a rotary drive 142, a cradle 143, a thruster cylinder 144, a clutch cylinder 145 (extension mechanism), a rotary drive side clutch plate 140, and a hydraulic motor 150.

[0028] The rotary frame 141 is rotatably mounted at the tip of the front frame 112. The angle of the rotary frame 141 relative to the front frame 112 can be adjusted in conjunction with the extension and retraction of the rotary frame luffing cylinder 126. The cradle 143 holds the rotary drive 142 inside. A rotary drive-side clutch plate 140 is connected to the lower end of the rotary drive 142 (see Figure 3(A)). The thruster cylinder 144 is located between the rotary frame 141 and the cradle 143. The rotary drive 142 and the cradle 143 move up and down in conjunction with the extension and retraction of the thruster cylinder 144.

[0029] As described later, the hose reel unit 130 is attached to the cradle 143 of the rotary drive unit 120, and is therefore suspended / lifted by the extension and retraction drive of the thruster cylinder 144.

[0030] The cradle 143 has first to third coupling parts 146 to 148 and a connecting part 149 (see Figures 7(A) and 8(A)). The first to third coupling parts 146 to 148 are connected to the first to third connected parts 136 to 138 of the hose reel unit 130. The first to third coupling parts 146 to 148 are each provided at different positions in the circumferential direction of the cradle 143 (centered on the Kelly bar 122). More specifically, the first coupling part 146 and the second coupling part 147 are located on both sides of the rotary drive 142 in the left-right direction and are arranged symmetrically to each other. The third coupling part 148 is located at the rear of the cradle 143. The connecting part 149 is located inside the first coupling part 146 and the second coupling part 147 (on the rotary drive 142 side). The first coupling part 146 and the second coupling part 147 will be described later.

[0031] The third joint 148 is formed in a plate shape and extends in the vertical direction. The third joint 148 has through holes 148A and 148B (see Figure 4). The through holes 148A and 148B are arranged side by side in the vertical direction. The through holes 148A and 148B penetrate the third joint 148 in the horizontal direction.

[0032] The connecting section 149 is composed of a pair of connecting pieces 149A (see Figure 7(A)) arranged parallel to each other and in a parallel manner in the left-right direction. The pair of connecting pieces 149A have through holes (not shown). The through holes penetrate the connecting pieces 149A in the left-right direction.

[0033] The pair of clutch cylinders 145 are positioned on either side of the rotary drive 142 in the left-right direction and are arranged symmetrically to each other. The pair of clutch cylinders 145 are located inside the first coupling portion 146 and the second coupling portion 147 of the cradle 143. In other words, the pair of clutch cylinders 145 are located between the rotary drive 142 and the first coupling portion 146 and the second coupling portion 147.

[0034] As shown in Figure 5, the clutch cylinder 145 extends and retracts due to the supply and discharge of hydraulic fluid. More specifically, the clutch cylinder 145 is extendable to a drive transmission position shown by a solid line, a drive disengagement position (first position) shown by a dashed line, and an installation process position (second position) shown by a dashed line. The total length L1 of the clutch cylinder 145 at the drive disengagement position is longer than the total length L0 at the drive transmission position, and the total length L2 at the installation process position is longer than the total length L1 at the drive disengagement position. In other words, the drive disengagement position of the clutch cylinder 145 extends further than the drive transmission position, and the installation process position extends further than the drive disengagement position. The total length L2 of the clutch cylinder 145 at the installation process position is set to a length that allows it to contact the connecting portion 139 of the hose reel unit 130.

[0035] The clutch cylinder 145 is provided with flange portions 145A and 145B that protrude from both ends in the vertical direction. The flange portions 145A and 145B are formed in a ring shape. Spherical bearings 145C and 145D are provided inside the flange portions 145A and 145B. The outer circumferential surfaces of the spherical bearings 145C and 145D are formed in a spherical shape and are in spherical contact with the inner circumferential surfaces of the flange portions 145A and 145B, and through holes are formed in the spherical bearings 145C and 145D. In this embodiment, the through hole of the spherical bearing 145C is arranged along the left-right direction, and the through hole of the spherical bearing 145D is arranged along the front-rear direction.

[0036] The spherical bearing 145C is located at the upper end (one end) of the clutch cylinder 145. A connecting pin 151 is inserted into the through hole of the spherical bearing 145C, along with the through hole of the connecting portion 149, thereby connecting the spherical bearing 145C and the connecting portion 149. As a result, the clutch cylinder 145 is connected to the cradle 143 in a state where its upper end can swing, and it protrudes below the cradle 143.

[0037] The spherical bearing 145D is located on the opposite side from the spherical bearing 145C, in other words, at the lower end (other end) of the clutch cylinder 145. The spherical bearing 145D is connected to the connecting portion 139 of the hose reel unit 130. The inner diameter of the through hole in the spherical bearing 145D matches the outer diameter D2 of the connecting pin 152. The connection between the spherical bearing 145D and the connecting portion 139 will be described later.

[0038] The second connecting portion 147 will be described with reference to Figures 9(A) and 9(B). The first connecting portion 146 has the same configuration as the second connecting portion 147 and is positioned symmetrically to the second connecting portion 147, therefore its description will be omitted. Figure 9(A) is a partially enlarged view of the second connected portion 137 and the area around the second connecting portion 147 from the front, and Figure 9(B) is a cross-sectional view along the line B2-B2 in Figure 9(A).

[0039] The second connecting portion 147 comprises a pair of connecting pieces 147A arranged parallel to each other and in parallel in the front-rear direction. The pair of connecting pieces 147A have through holes 147B. The through holes 147B penetrate the connecting pieces 147A in the front-rear direction. The first connecting portion 146 also has a through hole 146B (see Figure 3(A)). The through hole 146B has the same shape as the through hole 147B of the second connecting portion 147 and is arranged symmetrically to the through hole 147B.

[0040] Guide members 155A and 155B (guiding means) are positioned facing the inner surface of the connecting piece 147A (the side facing the clutch cylinder 145). The guide members 155A and 155B are provided on the second connected portion 137 of the hose reel unit 130. The guide members 155A and 155B are made of a resin material such as nylon. The guide members 155A and 155B are fastened to the second connected portion 137 by screws or the like (not shown).

[0041] The guide members 155A and 155B protrude in the front-rear direction from the side surface of the second coupled portion 137 and have tapered surfaces 155C and 155D in which the distance between them in the front-rear direction (guiding direction) gradually increases when the clutch cylinder 145 is retracted upward (in the extension direction). In other words, the guide members 155A and 155B have tapered surfaces 155C and 155D in which the distance between them and the inner surface of the coupling piece 147A gradually decreases when the clutch cylinder 145 is retracted upward (in the retraction direction).

[0042] The first connected portion 136 of the hose reel unit 130 is provided with guide members 155A and 155B, similar to the second connected portion 137. The guide members 155A and 155B of the first connected portion 136 are positioned to face the inner surface of the connecting piece of the first connecting portion 146.

[0043] The tapered surfaces 155C and 155D of the guide members 155A and 155B are formed to align with the first coupling portion 146 and the second coupling portion 147 of the cradle 143, and the point where the gap in the front-rear direction is greatest is formed to match the front-rear dimensions on the inner surfaces of the first coupling portion 146 and the second coupling portion 147. As a result, when the clutch cylinder 145 is retracted to the drive transmission position, the tapered surfaces 155C and 155D guide the first coupled portion 136 and the second coupled portion 137 (hose reel unit 130) to a predetermined position on the cradle 143 (rotary drive unit 120). Specifically, the "designated position" is the position where the through holes 136A, 137A, 138A, and 138B of the first to third connected parts 136 to 138 of the hose reel unit 130 coincide with the through holes 146B, 147B, 148A, and 148B of the first to third connected parts 146 to 148 of the rotary drive unit 120.

[0044] In addition, the guide members 155A and 155B shown in Figures 9(A) and 9(B) have tapered surfaces 155C and 155D in which the distance between them in the front-rear direction gradually increases when the clutch cylinder 145 is retracted. In this embodiment, however, the first connected portion 136 and the second connected portion 137 of the hose reel unit 130 are positioned in alignment with the first connected portion 146 and the second connected portion 147 of the cradle 143, and have tapered surfaces (not shown) in which the distance between them in the left-right direction (guiding direction) gradually increases when the clutch cylinder 145 is retracted. As a result, the guide members 155A and 155B of the rotary drive unit 120 guide the hose reel unit 130 to a predetermined position on the rotary drive unit 120 in both the front-rear and left-right directions.

[0045] (Installation method for hose reel unit 130) The method for attaching the hose reel unit 130 to the rotary drive unit 120 will be explained with reference to Figures 3, 4, and 6-11.

[0046] First, with the hose reel unit 130 grounded, an operator in the cab 4 operates the control device to align the clutch cylinder 145 with the connecting portion 139 of the hose reel unit 130 (as shown in Figures 3(A) and 3(B)). More specifically, the position of the spherical bearing 145D of the clutch cylinder 145 is aligned with the position between the pair of connecting pieces 139A. This alignment between the connecting portion 139 and the clutch cylinder 145 may have some misalignment in the front-rear and left-right directions, and may be as small as can be visually confirmed by the operator. At this time, the clutch cylinder 145 is in the drive transmission position with the shortest overall length L0.

[0047] Next, as shown in Figures 6(A) and 6(B), the operator extends the thruster cylinder 144 by operating the control device. This lowers the cradle 143, bringing it closer to the hose reel unit 130. During this process, as shown in Figures 7(A) and 7(B), the clutch cylinder 145 is in the drive transmission position and therefore does not come into contact with the connecting portion 139.

[0048] Next, as shown in Figures 8(A) and 8(B), the operator operates the control device to extend the clutch cylinder 145 to the mounting position (second position). As described above, the clutch cylinder 145 is set to a total length L2 such that it can contact the connecting portion 139 of the hose reel unit 130 when extended to the mounting position. In other words, this is the process of extending the clutch cylinder 145 to the mounting position and bringing the spherical bearing 145D into contact with the connecting portion 139.

[0049] After extending the clutch cylinder 145 to the mounting position, the worker inserts the connecting pin 152 into the through hole 139B of the connecting portion 139 and the through hole 145D of the spherical bearing 145D. In other words, the worker connects the clutch cylinder 145 and the connecting portion 139 via the connecting pin 152. The connecting pin 152 engages with the through hole 139B of the spherical bearing 145D located at the lower end of the clutch cylinder 145 and is locked into the through hole 139B of the connecting portion 139. As described above, the clutch cylinder 145 is connected to the cradle 143 in a manner that allows its upper end to swing, and the inner diameter D1 of the through hole 139B of the connecting portion 139 is larger than the outer diameter D2 of the connecting pin 152. Therefore, even if there is a misalignment between the clutch cylinder 145 and the connecting portion 139, the swing of the clutch cylinder 145 and the dimensional difference between the connecting pin 152 and the through hole 139B can absorb the misalignment.

[0050] After the step of connecting the clutch cylinder 145 and the connecting part 139, as shown in Figures 10(A), 10(B), 11(A), and 11(B), the operator operates the operating device to retract the clutch cylinder 145 from the mounting position to the drive transmission position. Then, by retracting the clutch cylinder 145, the hose reel unit 130 is pulled up towards the rotary drive unit 120. As described above, guide members 155A and 155B are arranged on the first connected part 136 and the second connected part 137 of the hose reel unit 130. This allows the operator to guide the hose reel unit 130 to a predetermined position on the rotary drive unit 120 when retracting the clutch cylinder 145 to the drive transmission position, in other words, to a position where the through holes 136A, 137A, 138A, and 138B of the first to third connected parts 136 to 138 coincide with the through holes 146B, 147B, 148A, and 148B of the first to third connected parts 146 to 148.

[0051] As shown in Figures 10(A) and 10(B), when the clutch cylinder 145 is retracted to the drive transmission position, it can be aligned to a predetermined position. The operator then holds the hose reel unit 130 up using the clutch cylinder 145 and inserts the coupling pins 154 into the through holes 136A, 137A, 138A, 138B and 146B, 147B, 148A, 148B to connect them. This allows the operator to easily attach the hose reel unit 130 to the cradle 143 of the rotary drive unit 120.

[0052] As described above, since the through holes 136A, 137A, 138A, and 138B are elongated holes extending in the vertical direction, the cradle 143 and the hose reel unit 130 can move relative to each other within the range in which the coupling pin 154 moves inside the through holes 136A, 137A, 138A, and 138B. In other words, the clutch cylinder 145 can be extended and retracted within the range in which the coupling pin 154 moves inside the through holes 136A, 137A, 138A, and 138B.

[0053] When the hose reel unit 130 is attached to the cradle 143 of the rotary drive unit 120, and the clutch cylinder 145 is in the drive transmission position, as described above, the hose reel unit side clutch plate 135 contacts the lower surface of the rotary drive 142, and the fitting pin 135A engages with the fitting hole of the rotary drive side clutch plate 140. As a result, the rotational drive of the rotary drive 142 is transmitted to the hose reel unit side clutch plate 135. When the clutch cylinder 145 retracts to the drive disengagement position, the hose reel unit side clutch plate 135 moves away from the lower surface of the rotary drive 142, and the engagement between the fitting pin 135A and the fitting hole of the rotary drive side clutch plate 140 is released. As a result, the rotational drive of the rotary drive 142 is disconnected from the hose reel unit side clutch plate 135. In other words, the clutch cylinder 145 can switch the drive transmission state between the rotary drive unit 120 and the hose reel unit 130.

[0054] As described above, this embodiment provides the following advantages. When the clutch cylinder 145 is retracted (extended or retracted) while connected to the connecting portion 139 of the hose reel unit 130, the guide members 155A and 155B guide the hose reel unit 130 closer to a predetermined position on the rotary drive unit 120. This allows the coupling pins 154 to be easily inserted into the through holes 136A, 137A, 138A, 138B and 146B, 147B, 148A, 148B. This makes it easy to install the hose reel unit 130.

[0055] Furthermore, the clutch cylinder 145, which is provided on the rotary drive unit 120 and switches the drive transmission state between the rotary drive unit 120 and the hose reel unit 130, can be extended from the drive disengagement position (first position) to the installation work position (second position) and connected to the hose reel unit 130. This makes it possible to easily install the hose reel unit 130 without increasing the number of parts. In other words, it is possible to suppress the cost increase of the earth drill machine 1.

[0056] Furthermore, the guide members 155A and 155B can guide the first connected portion 136 and the second connected portion 137 in the front-rear and left-right directions when the clutch cylinder 145 is retracted. This makes the installation of the hose reel unit 130 even easier.

[0057] Furthermore, when the clutch cylinder 145 extends to the mounting position (second position), it has a total length L2 that allows it to come into contact with the connecting portion 139 of the hose reel unit 130, thus ensuring a secure connection between the clutch cylinder 145 and the connecting portion 139. This makes the installation of the hose reel unit 130 even easier.

[0058] Furthermore, guide members 155A and 155B guide the hose reel unit 130 to a predetermined position on the rotary drive unit 120 in the front-rear and left-right directions, and the hose reel unit 130 is connected to the first to third coupling parts 146 to 148, thereby restricting the hose reel unit 130 from rotating circumferentially (around the Kelly bar 122) relative to the rotary drive unit 120. This allows the hose reel unit-side clutch plate 135 to be positioned accurately relative to the rotary drive unit 120, thus ensuring reliable operation of the drive transmission state switching by the clutch cylinder 145.

[0059] Furthermore, the clutch cylinder 145 is connected to the cradle 143 in a manner that allows its upper end to swing, and a spherical bearing 145D located at the lower end of the clutch cylinder 145 is connected to the connecting portion 139 of the hose reel unit 130 via a connecting pin 152. Since the inner diameter D1 of the through hole 139B of the connecting portion 139 is larger than the outer diameter D2 of the connecting pin 152, misalignment between the clutch cylinder 145 and the connecting portion 139 can be absorbed. As a result, alignment between the clutch cylinder 145 and the connecting portion 139 is not time-consuming, and the installation of the hose reel unit 130 can be made even easier.

[0060] It should be noted that the present invention is not limited to the embodiments described above, and various modifications are possible without departing from the spirit of the invention. All technical matters included in the technical concept described in the claims are subject to the present invention. The embodiments described above are preferred examples, but those skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed herein, and these are included in the technical scope described in the appended claims.

[0061] The above embodiment shows an example of applying the present invention to an earth drill machine 1, but the present invention is not limited to this and can be applied to other foundation machinery in general, such as cranes. Furthermore, while a clutch cylinder 145 is exemplified as the extension means, it is not limited to this, and any extension means that can extend at least between a first position, which is the normal state, and a second position, which is extended beyond the first position when connected to the hose reel unit 130, is acceptable. For example, a hydraulic cylinder provided in the rotary drive unit 120, separate from the clutch cylinder 145, may also be used.

[0062] Furthermore, in the above embodiment, when the telescopic means is retracted toward the rotary drive unit 120, the configuration is shown in which the first connected portion 136 and the second connected portion 137 (hose reel unit 130) are guided to a predetermined position on the cradle 143 (rotary drive unit 120). However, the configuration is not limited to this, and for example, the telescopic means may be provided on the hose reel unit 130 side, and when the telescopic means is extended toward the rotary drive unit 120, the hose reel unit 130 may be guided to a predetermined position on the rotary drive unit 120. In other words, any configuration that guides the hose reel unit 130 to a predetermined position on the rotary drive unit 120 when the telescopic means is extended or retracted is acceptable.

[0063] Furthermore, the guide member (guide means) for guiding the hose reel unit 130 to a predetermined position in the rotary drive unit 120 is not limited to the configuration having a tapered surface as in the above embodiment, but may also have a stepped surface in which the spacing in the guide direction perpendicular to the retraction direction decreases in stages when the clutch cylinder 145 is retracted. [Explanation of Symbols]

[0064] 1. Earth drill machine 2. Running body 3. Rotating body 4 Cab 10 Main Unit 100 Front Attachment 110 boom 120 Rotary Drive Unit 122 Kellyba 130 Hose Reel Unit 131 Hydraulic hose 135 Hose reel unit side clutch plate 136~138 1st~3rd connected part 139 Connecting part 140 Rotary drive side clutch plate 141 Rotary Frame 142 Rotary Drive 143 Cradle 144 Thruster Cylinder 145 Clutch cylinder (extension mechanism) 145C, 145D spherical bearings 146~148 1st~3rd joint 149 Connection section 150 Hydraulic motor 155A, 155B Guide Members

Claims

1. A foundation machine comprising a rotary drive unit and a hose reel unit attached to the rotary drive unit, The aforementioned rotary drive unit is A telescopic mechanism that allows the overall length to be extended and retracted, With the extension mechanism connected to the hose reel unit, the system includes a guide mechanism that guides the hose reel unit toward a predetermined position on the rotary drive unit when the extension mechanism is extended or retracted. A basic machine characterized by the following features.

2. In the basic machine according to claim 1, The extension / retraction mechanism is a clutch cylinder that switches the drive transmission state between the rotary drive unit and the hose reel unit. The aforementioned clutch cylinder is A first position in which the rotary drive unit is disconnected from the hose reel unit, When connected to the hose reel unit, it is extendable to a second position that extends beyond the first position. A basic machine characterized by the following features.

3. In the basic machine according to claim 2, The hose reel unit includes a coupling portion which is coupled to the rotary drive unit, The guiding means guides the coupled portion in a guiding direction perpendicular to the extension / retraction direction when the clutch cylinder is extended or retracted. A basic machine characterized by the following features.

4. In the basic machine according to claim 2, The hose reel unit includes a connecting portion that is connected to the clutch cylinder, The clutch cylinder, when extended to the second position, is capable of contacting the connecting portion. A basic machine characterized by the following features.

5. In the basic machine described in claim 3, The rotary drive unit includes a coupling portion that connects to the coupled portion of the hose reel unit, The coupling portion restricts the hose reel unit from rotating relative to the rotary drive unit by coupling with the coupled portion while the coupled portion is guided in the guide direction by the guide means. A basic machine characterized by the following features.

6. In the basic machine according to claim 1, The hose reel unit includes a connecting portion which is connected to the extension / retraction means, The aforementioned expandable / contractable means is One end is pivotably connected to the rotary drive unit, The other end, opposite to the aforementioned one end, is connected to the connecting portion. A basic machine characterized by the following features.

7. A method for attaching a hose reel unit to a rotary drive unit, The rotary drive unit is provided with an extendable mechanism that allows its entire length to be extended and retracted, and the process involves extending the extendable mechanism to bring it into contact with the hose reel unit, The steps include connecting the retractable means, which is in contact with the hose reel unit, to the hose reel unit, The process involves extending and retracting the aforementioned extension means to pull the hose reel unit towards the rotary drive unit, and guiding the hose reel unit to a predetermined position using a guide means provided on the rotary drive unit. The process includes maintaining the hose reel unit in an extended state using the extension means, and connecting the hose reel unit to the rotary drive unit. How to install the hose reel unit.

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