Hose guide mechanism and construction machine

Abstract

To provide a guide mechanism of a hose and a construction machine capable of facilitating replacement work of the hose.SOLUTION: A guide mechanism of a hose is provided with a guide ring 14 installed on a boom 4 of a construction machine (a vehicle type crane) 1 and restricting a hose (a hydraulic hose) 7 arranged along the boom 4 to the inside of an annular structure. The guide ring 14 is configured such that a lower side of the annular structure is opened. The guide ring 14 includes a first columnar member 17 forming an upper side and mounted on the boom 4 side, a second columnar member 18 forming a side, and a third columnar member 19 forming a lower side.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a mechanism for guiding a hose such as a hydraulic hose provided in a construction machine or the like, and to a construction machine to which the same is applied. [Background technology]

[0002] For example, in construction machinery such as cranes and aerial work platforms that have a mechanism that operates hydraulically together with a telescopic boom, a hose (hydraulic hose) is installed that transmits hydraulic pressure along the boom. The hose is flexible, and moves close to the boom while deforming as it is reeled out or reeled in in accordance with the movement of the boom so as not to interfere with the movement of the boom, such as telescopic or raising and lowering.

[0003] Guide mechanisms are provided at various points on the boom so that the hydraulic hose moves while maintaining an appropriate position relative to the boom when it is in operation. Guide mechanisms include a guide drum around which the hydraulic hose is wound, and a ring-shaped member (hereinafter, "guide ring") that surrounds the hydraulic hose. These guide mechanisms are attached to key points on the path along which the hydraulic hose extends, and are designed to restrain the hydraulic hose from straying too far from the boom while allowing the hydraulic hose to slide along its longitudinal direction and bend in a direction intersecting with its longitudinal direction to an appropriate degree.

[0004] Technical documents that describe hydraulic hoses attached to the booms of such construction machines and their guide mechanisms include, for example, Patent Document 1 listed below. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] JP 2018-115046 A Summary of the Invention [Problem to be solved by the invention]

[0006] The guide rings of the above-mentioned guide mechanism are, for example, annular members attached to a plurality of points on the boom, and are configured to restrain a hydraulic hose by passing the hydraulic hose inside the annular structure.

[0007] However, this guide ring is not always used with the hydraulic hose passed through it. When storing the construction machine, the hydraulic hose is removed from the guide ring so as not to interfere with storage or maintenance, and is passed through again when the machine is in operation. This type of hydraulic hose replacement work requires a fair amount of strength when done manually. This is because the hydraulic hose is subjected to its own weight, the weight of the oil flowing inside, and tension applied from the hose reel, and the hydraulic hose must be operated against these forces.

[0008] Here, even if it is difficult to reduce the force applied to the hydraulic hose during replacement, if the replacement work could be simplified, it would reduce the time that workers need to support the hydraulic hose and reduce the need to change their posture while supporting the hydraulic hose, thereby reducing the burden on workers.

[0009] SUMMARY OF THE PRESENT EMBODIMENT In view of the above circumstances, the present invention aims to provide a hose guide mechanism and a construction machine that enable easy replacement of a hose. [Means for solving the problem]

[0010] The present invention provides a hose guide mechanism that is installed on a boom of a construction machine and includes a guide ring that restrains a hose arranged along the boom inside a ring structure, the guide ring being configured so that a lower side of the ring structure is open, the guide ring being configured to include a first pillar-shaped member that forms an upper side and is attached to the boom side, a second pillar-shaped member that forms a side side, and a third pillar-shaped member that forms a lower side, the first pillar-shaped member being connected to the second pillar-shaped member, The device can be pivoted to freely tilt up and down. The present invention relates to a hose guide mechanism comprising a support portion that supports a rotating shaft above the axis of the first pillar-shaped member.

[0012] In the hose guide mechanism of the present invention, the second pillar-shaped member may be configured to be rotatable together with the third pillar-shaped member relative to the first pillar-shaped member.

[0014] The hose guide mechanism of the present invention can be configured to include a base member to which the first pillar-shaped member is fixed, and the third pillar-shaped member can be provided with an attachment / detachment mechanism that can engage with the base member.

[0015] The hose guide mechanism of the present invention may be configured so that the first columnar member has a shoulder portion on which the second columnar member can be temporarily placed.

[0016] The hose guide mechanism of the present invention may also include an attachment / detachment mechanism on the second columnar member that is engageable with the first columnar member.

[0017] The guide mechanism of the hose of the present invention may be configured such that, when the guide ring is in an open state, the second columnar member can be held relative to the first columnar member by a biasing body provided on the second columnar member.

[0019] The present invention also relates to a construction machine to which the above-mentioned hose guide mechanism is applied. Effect of the Invention

[0020] Advantageous Effects of Invention The hose guide mechanism and construction machine of the present invention have the excellent effect of simplifying the task of replacing a hose. [Brief description of the drawings]

[0021] [Figure 1] 1 is a side view showing an example of an overall image of a construction machine to which the present invention is applicable. [Diagram 2] FIG. 2 is a side view showing the configuration of a front portion of a boom provided on the construction machine of FIG. 1. [Diagram 3] 1 is a front view showing an example (first embodiment) of a guide ring constituting a guide mechanism according to an embodiment of the present invention; [Figure 4] FIG. 4 is a side view of the guide ring of the first embodiment. [Diagram 5] 4 is a cross-sectional view showing the internal structure of some members in the guide ring of the first embodiment. FIG. [Figure 6] 13 is a front view showing another example of a shoulder portion provided on the first pillar-shaped member. FIG. [Figure 7] 13 is a side view showing another example of a shoulder portion provided on the first pillar-shaped member. FIG. [Figure 8] FIG. 2 is a side view showing an example of a configuration of the tip of a boom in a construction machine, illustrating a stored state. [Figure 9] 9 is a side view showing a state in which the hose is passed through the guide ring and the drum unit is raised from the state shown in FIG. 8. [Figure 10] 1 shows the stored state of the first embodiment and its positional relationship with the hose. [Figure 11] This shows the state in which the annular structure is being opened from the state in Figure 10 and the hose is being passed through. [Figure 12] This shows the state in which the ring structure is further closed from the state in FIG. [Figure 13] FIG. 1 is a front view for explaining an example of a conventional guide ring as a reference example of the present invention, showing a stored state and a positional relationship with respect to a hose. [Figure 14] This shows the state in which the annular structure is being opened from the state in FIG. 13 and the hose is being passed through. [Figure 15] This shows the state in which the ring structure is further closed from the state in FIG. [Figure 16] FIG. 4 is a perspective view showing a positional relationship with a guide ring during rotation of the drum unit in the first embodiment of the present invention. [Figure 17] FIG. 11 is a perspective view showing a positional relationship between the drum unit and a guide ring during rotation in a reference example of the present invention. [Figure 18] FIG. 11 is a front view showing another example (second embodiment) of the configuration of the guide ring in the guide mechanism according to the present invention, in which the internal structure of some members is shown in cross section. [Figure 19]FIG. 11 is a front view showing a state in which the guide ring of the second embodiment is open. [Figure 20] FIG. 13 is a front view showing another example (third embodiment) of the configuration of the guide ring in the guide mechanism according to the present invention, in which the internal structure of some members is shown in cross section. [Figure 21] FIG. 11 is a front view showing a state in which the guide ring of the third embodiment is open. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0022] Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

[0023] 1 and 2 show an example of a construction machine to which the present invention is applicable and a boom provided on the construction machine. A vehicle-type crane 1, which is a construction machine, is provided with a boom 4 via a swivel base 3 on the top of a vehicle body 2. The boom 4 is supported at its base so as to be rotatable about a horizontal axis relative to the swivel base 3, and is adapted to perform a hoisting operation relative to the swivel base 3 by extension and contraction of a hydraulic hoisting cylinder (not shown).

[0024] As shown in Fig. 2, the boom 4 has a structure in which multiple cylinders 5 are connected in a telescopic manner, and is configured to be extendable and retractable by a hydraulic mechanism (not shown). The base of a jib 6 is attached to the underside of the tip of the boom 4 so as to be rotatable about a rotary shaft 6a, and when the vehicle-type crane 1 is in operation, the jib 6 is swung out from the tip of the boom 4 for use, and when the vehicle-type crane 1 is to be stored, the jib 6 can be removed from the boom 4 as necessary. Note that Fig. 2 shows the state during storage in which the jib 6 is supported by the boom 4 and the boom 4 is retracted and lowered.

[0025] A hose reel 8 around which a hose (hydraulic hose) 7 is wound is attached to the middle of the boom 4 to pay out and take up the hydraulic hose 7, and a guide drum 9 is attached to the tip side of the hose reel 8. The hydraulic hose 7 extends from the base side to the tip side along the boom 4, and after being wound around the hose reel 8, it is wound in turn around guide drums 9 provided at various points on the boom 4. The hydraulic hose 7 further turns back at the tip of the boom 4 and extends towards the jib 6 to supply hydraulic pressure for driving the jib 6.

[0026] A drum unit 10 is attached near the tip of the boom 4. This drum unit 10 is provided near the connection part of the jib 6 with the boom 4, is located toward the lower part of the tip of the boom 4, and includes two guide drums 11 and 12. The guide drums 11 and 12 are connected to each other by a link member 13 through their parallel shafts 11a and 12a, and the entire drum unit 10 including these guide drums 11 and 12 is supported so as to be rotatable around the shaft 11a attached to the base end of the jib 6. The shaft 11a is set coaxially with the rotation shaft of the jib 6 relative to the boom 4, so that the positional relationship of the drum unit 10 with respect to the boom 4 does not change due to the swinging operation of the jib 6. In this way, the guide drum 12 rotates around the guide drum 11 around the shaft 11a with respect to the boom 4 and the jib 6.

[0027] The guide drum 9 and drum unit 10 each constitute a guide mechanism that guides the position and movement of the hydraulic hose 7, and the vehicle crane 1 further comprises a guide ring 14 as a guide mechanism. The guide ring 14 is attached to the tip of each of the cylindrical bodies 5 that constitute the boom 4.

[0028] In addition, for convenience of explanation, in Figures 1 and 2, parts that are not directly related to the gist of the present invention and parts that impede visibility of the main parts are omitted as appropriate (the same applies to the subsequent figures).

[0029] 3 to 5 show the configuration of the guide ring 14 constituting the hose guide mechanism according to the first embodiment of the present invention. The guide ring 14 is a part of a simple configuration including a base member 16 attached to a mounting bracket 15 fixed to the boom 4 (see Figs. 1 and 2) side, and three pillar-shaped members 17, 18, and 19 attached to the base member 16 to form an openable and closable ring-shaped structure. When the pillar-shaped members 17, 18, and 19 are in a closed state (as shown by solid lines in Fig. 3), the four members, the base member 16, the first pillar-shaped member 17, the second pillar-shaped member 18, and the third pillar-shaped member 19, form the four sides of a square ring-shaped structure, with the base member 16 facing the second pillar-shaped member 18, and the first pillar-shaped member 17 facing the third pillar-shaped member 19, respectively. The surface surrounded by the first to third columnar members 17 to 19 is approximately perpendicular to the extension direction of the hydraulic hose 7, so that the hydraulic hose 7 extending along the boom 4 can be surrounded by the first to third columnar members 17 to 19.

[0030] When the guide ring 14 is attached to the boom 4 and closed, of the columnar members constituting the guide ring 14, the first columnar member 17 and the third columnar member 19 are approximately parallel to the ground and respectively form the upper and lower sides of the annular structure of the guide ring 14. The base member 16 and the second columnar member 18 are respectively placed between the ends of the first columnar member 17 and the third columnar member 19 which are parallel to each other, and form both side sides of the annular structure. For convenience of explanation, the upper and lower positional relationships of the guide ring and other devices will be described below based on the state in which the boom 4 is lowered.

[0031] The base member 16 is fixed to the mounting bracket 15 by a fastener such as a bolt at a mounting portion 16a provided at one end of the base member 16. The other end of the base member 16 is provided with an engagement hole 16b as an engagement portion that engages with an attachment / detachment mechanism of a third columnar member 19, as described below.

[0032] A base end of a first pillar member 17 is fixed to the middle part of the base member 16. The first pillar member 17 has a base end fixed to the middle part of the base member 16 and protrudes in a direction perpendicular to the base member 16. The first pillar member 17 is attached to a mounting bracket 15, which is a member on the boom 4 side, via the base member 16, and supports the entire guide ring 14.

[0033] The base end of a second columnar member 18 is rotatably attached around a rotation axis 17b to the tip end 17a of the first columnar member 17. A third columnar member 19 is attached to the tip end of the second columnar member 18 so as to be perpendicular to the second columnar member 18.

[0034] The rotation axis 17b is provided in a direction perpendicular to the plane including the engagement hole 16b of the base member 16 and the axis of the first columnar member 17, and the second columnar member 18 is provided so that its axis coincides with or is parallel to the plane. The third columnar member 19 is provided so that its axis coincides with or is parallel to the plane, and its tip can be engaged with the engagement hole 16b of the base member 16 by a detachment mechanism described later.

[0035] In this way, the second columnar member 18 and the third columnar member 19 attached thereto can be rotated as a whole relative to the first columnar member 17 by the rotation mechanism of the rotation shaft 17b of the second columnar member 18. The guide ring 14 is capable of opening and closing the annular structure formed by the base member 16 and the first to third columnar members 17 to 19 by such a simple mechanism. Furthermore, when the annular structure is in a closed state (closed state), the tip of the third columnar member 19 is engaged with the base member 16 by the detachment mechanism, so that the closed state can be maintained.

[0036] The following describes the attachment / detachment mechanism provided in the third columnar member 19. The third columnar member 19 includes a cylinder 19a, a lock pin 19b, a grip 19c, and a biasing body 19d as the attachment / detachment mechanism, and is configured by accommodating a rod-shaped lock pin 19b inside a cylindrical cylinder 19a that forms the outer shell of the third columnar member 19, as shown in FIG.

[0037] The base end of the cylinder 19a is fixed to the second columnar member 18, and the lock pin 19b housed inside is disposed so that both ends protrude outward in the axial direction from both ends of the cylinder 19a. The base end of the lock pin 19b protrudes from the tip of the second columnar member 18 on the side opposite to the side where the main part of the third columnar member 19 is provided, and a ring-shaped grip part 19c is attached to the protruding part.

[0038] A biasing body 19d is disposed between the outer peripheral surface of the lock pin 19b housed in the cylindrical body 19a and the inner peripheral surface of the cylindrical body 19a. The biasing body 19d is, for example, a coil spring, and biases the lock pin 19b from the base side toward the tip side with respect to the cylindrical body 19a. The biasing force of the biasing body 19d holds the lock pin 19b in a state in which the tip protrudes from the tip of the cylindrical body 19a, but when the gripping portion 19c provided at the base end of the lock pin 19b is gripped and the lock pin 19b is pulled toward the base side against the biasing force of the biasing body 19d, the tip of the lock pin 19b is pulled into the tip of the cylindrical body 19a. In addition, the dimension of gripping portion 19c in the direction perpendicular to the axis of locking pin 19b is set to be larger than the inner diameter of cylindrical body 19a, and gripping portion 19c interferes with cylindrical body 19a on the base end side of locking pin 19b, thereby preventing locking pin 19b from excessively protruding toward the tip side from cylindrical body 19a or falling out due to the biasing force of biasing body 19d.

[0039] The other end of the base member 16 is provided with an engagement hole 16b as described above, and when the tip of the lock pin 19b is protruded from the tip of the cylindrical body 19a with the guide ring 14 closed, the tip of the lock pin 19b enters the engagement hole 16b, whereby the third columnar member 19 is engaged with the base member 16, and the annular structure of the guide ring 14 is maintained. When the gripping portion 19c is operated from this state to pull the tip of the lock pin 19b into the tip of the cylindrical body 19a, the tip of the lock pin 19b is removed from the engagement hole 16b, and the engagement state is released. When the engagement state is released, the second columnar member 18 and the third columnar member 19 can be rotated around the rotation axis 17b to open the guide ring 14.

[0040] Also, when the guide ring 14 is closed from an open state, the tip of the lock pin 19b abuts against the base member 16 and is pushed in, and when the guide ring 14 is completely closed and the axis of the lock pin 19b coincides with the central axis of the engagement hole 16b, the tip of the lock pin 19b protrudes from the tip of the cylindrical body 19a by the biasing force of the biasing body 19d and engages with the engagement hole 16b. Therefore, when closing the guide ring 14, it is not necessary to operate the lock pin 19b with the gripping part 19c. In this way, the attachment / detachment mechanism provided on the third columnar member 19 allows the guide ring 14 to be easily switched between open and closed.

[0041] The third columnar member 19 is further provided with a cylindrical roller 19e so as to cover the outer circumferential surface of the cylindrical body 19a. The roller 19e is adapted to rotate around the axis of the third columnar member 19 along the surface of the cylindrical body 19a.

[0042] Furthermore, a shoulder 17c is provided at the tip 17a of the first columnar member 17 for temporarily placing the second columnar member 18. As shown in Figures 3 and 4, the tip 17a of the first columnar member 17, which is the attachment portion of the second columnar member 18, is thinner than the body 17d (i.e., the dimension in the direction along the rotation axis 17b is smaller), and the tip 17a is sandwiched between the base end member of the second columnar member 18, and the two are connected to each other with the rotation axis 17b penetrating them.

[0043] Here, the first columnar member 17 has a step between the thick body 17d and the thin tip 17a, where the dimensions change, and this step is formed as a shoulder 17c with the end face of the body 17d facing diagonally upward. By setting the diagonal angle of the shoulder 17c in this way, when the guide ring 14 is opened, the second columnar member 18 can be rotated to the body 17d side rather than directly above the rotation shaft 17b (see the position indicated by the dashed line in FIG. 3).

[0044] The angle of the shoulder 17c can be set appropriately, but is set at an angle such that the center of gravity (indicated by the symbol G in FIG. 3) of the member formed by the second columnar member 18 and the third columnar member 19 can be located closer to the body 17d than the rotation axis 17b when the second columnar member 18 is rotated to the position shown by the dashed line in FIG. 3. In this way, when the guide ring 14 is opened, the second columnar member 18 and the third columnar member 19 can be temporarily placed above the first columnar member 17 with part of the second columnar member 18 resting on the shoulder 17c.

[0045] Incidentally, the mechanism for temporary placement by setting such a shoulder can be appropriately modified depending on the form of connection between the first columnar member 17 and the second columnar member 18. For example, as shown in Figures 6 and 7, when the member on the second columnar member 18 side is formed thin and the connection part is formed by sandwiching this part with the member on the first columnar member 17 side, it is possible to achieve the same effect by providing an oblique shoulder portion 17c between the members sandwiching the second columnar member 18.

[0046] The procedure for replacing the hose in the guide mechanism of the first embodiment will now be described.

[0047] When the vehicle-type crane 1 is stored, as shown in Fig. 8, the hydraulic hose 7 extending from the base side of the boom 4 is wound around the guide drums 11 and 12 of the drum unit 10 provided near the tip of the boom 4 without passing through the guide ring 14, and is folded back and arranged to extend along the jib 6. When the vehicle-type crane 1 is operated from this state, the hydraulic hose 7 is replaced prior to operation so that the hydraulic hose 7 does not interfere with operations such as extending the boom 4 or swinging out the jib 6. That is, as shown in Fig. 9, the hydraulic hose 7 is passed through the guide rings 14 provided at the tip of each cylindrical body 5 constituting the boom 4. In addition, the drum unit 10 is rotated around the shaft 11a, and the guide drum 12 is raised upward relative to the guide drum 11.

[0048] When stored (see Figure 8), the hydraulic hose 7 that has extended along the boom 4 to the tip side is wound around the guide drum 11 and then the guide drum 12, and is folded back to the jib 6 that is supported underneath the boom 4. However, when the guide drum 12 is raised by rotating the drum unit 10 (see Figure 9), the hydraulic hose 7 that has extended along the boom 4 is wound around the guide drum 12 and then the guide drum 11, and is then extended to the jib 6.

[0049] In the state shown in FIG. 8, each guide ring 14 is closed as shown in FIG. 10, and the hydraulic hose 7 is located below the outside of each guide ring 14. When passing the hydraulic hose 7 through each guide ring 14 from here as shown in FIG. 9, first, the guide ring 14 is opened as shown in FIG. 11. When the guide ring 14 is closed, the tip of the lock pin 19b of the third columnar member 19 enters and engages with the engagement hole 16b of the base member 16 (see solid line in FIG. 3), so the gripping part 19c is gripped and the lock pin 19b is pulled toward the base to release the engagement, and then the second columnar member 18 is rotated together with the third columnar member 19. At this time, the opened second columnar member 18 can be temporarily placed together with the third columnar member 19 on the shoulder part 17c of the first columnar member 17.

[0050] After the guide ring 14 is opened, the drum unit 10 is rotated to raise the guide drum 12 as shown in FIG. 9. The hydraulic hose 7, which had been located below the guide ring 14, is automatically pulled up to the inside of the guide ring 14 by tension as a result of this operation (see the arrow in FIG. 11). At this time, the third columnar member 19, which is the lower side of the annular structure of the guide ring 14, has retreated from the lower part of the guide ring 14. Therefore, the hydraulic hose 7 is not hindered by the components of the guide ring 14 and simply moves straight upward to be accommodated inside the guide ring 14 without any special operation being performed on the hydraulic hose 7 itself. Thereafter, the guide ring 14 is closed as shown in FIG. 12, completing the replacement of the hydraulic hose 7.

[0051] When the vehicle crane 1 (see FIG. 1) is operated with the hydraulic hose 7 restrained inside the guide ring 14 in this manner, the hydraulic hose 7 moves back and forth in the longitudinal direction as the hose is unreeled and reeled in from the hose reel 8 while contacting the third pillar-shaped member 19 at the bottom side of the guide ring 14 due to its own weight in accordance with the extension and retraction of the boom 4 and other movements of various parts. At that time, the roller 19e provided on the third pillar-shaped member 19 rotates, allowing the hydraulic hose 7 to slide smoothly in the longitudinal direction. To remove the hydraulic hose 7 from the guide ring 14, the above procedure can be reversed.

[0052] Furthermore, in actual construction machinery, depending on the relative positions of the various parts that make up the guide mechanism, the tension actually applied to the hydraulic hose, the length of the hydraulic hose that is pulled out, etc., it is possible that the hydraulic hose will not be able to be lifted up to the inside of the guide ring by simply opening the guide ring and rotating the drum unit. In such cases, the hydraulic hose can be lifted further by hand, or other appropriate supplementary work can be done.

[0053] As a reference example of the present invention, Figures 13 to 15 show an example of a conventional guide ring and the hydraulic hose replacement work using this. Guide ring 20 of the reference example is similar to guide ring 14 in the first embodiment in that it is configured to include first to third columnar members 21 to 23 on base member 16, but differs from the first embodiment in that the ring structure is opened by rotating or sliding only second columnar member 22 relative to third columnar member 23. That is, in guide ring 20 of this reference example, the side edge of the ring structure is opened rather than the bottom edge during replacement work.

[0054] When replacing the hydraulic hose 7 in the guide ring 20 having such a structure (see Figs. 8 and 9), for example, the guide ring 20 is closed as shown in Fig. 13, and the hydraulic hose 7 is positioned below it. Then, the second columnar member 22 is operated as shown in Fig. 14 to open the ring structure. Since the side of the guide ring 20 is open, the hydraulic hose 7 is moved to the inside of the guide ring 20 so as to bypass the third columnar member 23, which is the lower side, as shown by the arrow in Fig. 14. Thereafter, the second columnar member 22 is operated as shown in Fig. 15 to close the guide ring 20. Furthermore, when the drum unit 10 is rotated as shown in Fig. 9 to pull up the guide drum 12, the hydraulic hose 7 is floated in the guide ring 20 as shown by the arrow in Fig. 15 due to the tension of the hydraulic hose 7.

[0055] In such a replacement operation for the guide ring 20 of the reference example, a certain amount of force and effort is required to store the hydraulic hose 7 inside the guide ring 20. The hydraulic hose 7 is subjected to its own weight as well as the weight and tension of the oil flowing inside, and the hydraulic hose 7 must be lifted against these forces. Also, if the hydraulic hose 7 is to be circumvented around the third columnar member 23, the hydraulic hose 7 must be pulled out of the hose reel 8 by that amount, which requires even more force. In contrast, with the guide ring 14 shown in Figures 10 to 12, the third columnar member 19, which is the lower side of the annular structure, is released, and the hydraulic hose 7 is automatically lifted by tension and stored inside the guide ring 14 when the drum unit 10 is rotated, so that a large force is not required to replace the hydraulic hose 7. Of course, as described above, it is conceivable that the hydraulic hose 7 may not be able to fit within the guide ring simply by rotating the drum unit 10, but even in that case, it is sufficient to lift the hydraulic hose 7 straight up slightly, and there is no need to bend the hydraulic hose 7 to bypass the component at the bottom edge of the ring structure, so the workload is still significantly reduced compared to the reference example.

[0056] Furthermore, in the first embodiment, a shoulder 17c is provided on the first columnar member 17 that corresponds to the upper side of the guide ring 14, so that the second columnar member 18 can be temporarily placed thereon. This makes it possible to keep the lower side open without having to separately hold the components of the guide ring 14. Therefore, in the replacement work, there is no need to hold the second columnar member 18 while rotating the drum unit 10, making the work even easier.

[0057] Furthermore, in the case of guide ring 14 of the first embodiment, when the annular structure is opened, in addition to the third columnar member 19 corresponding to the lower edge, the second columnar member 18 is also retracted, which has the advantage that guide ring 14 is less likely to interfere with drum unit 10 when drum unit 10 is operated.

[0058] When raising the drum unit 10 from the state shown in Fig. 8 to the state shown in Fig. 9, by rotating the drum unit 10 clockwise, the guide drum 12 can be raised without passing through the position where the guide ring 14 is provided, but in this operation, the guide drum 12 around which the hydraulic hose 7 is wound is pulled in a direction away from the hose reel 8 (see Fig. 2). In other words, the drum unit 10 must be rotated while pulling out the hydraulic hose 7 against the tension applied to the hydraulic hose 7 from the hose reel 8.

[0059] In contrast, when the drum unit 10 is rotated counterclockwise, there is no need to pull out the hydraulic hose 7 from the hose reel 8, or the amount of pulling out can be reduced.

[0060] That is, if the hose reel 8 is a motor type, stopping the motor that powers it will not generate a winding force on the hydraulic hose 7, and even if slack occurs in the hydraulic hose 7, the hydraulic hose 7 will not be automatically wound up. Therefore, when rotating the drum unit 10 counterclockwise, there is no need to pull out the hydraulic hose 7 throughout the operation.

[0061] If the hose reel 8 is a spring type, a winding force is constantly applied to the hydraulic hose 7, and if slack occurs in the hydraulic hose 7, it is automatically wound up. For this reason, even when rotating the drum unit 10 counterclockwise, the hydraulic hose 7 needs to be pulled out in the latter half of the rotation operation. However, when rotating the drum unit 10 clockwise, the hydraulic hose 7 needs to be pulled out largely in the first half of the rotation operation, and then the drum unit 10 needs to be operated slowly while resisting the winding force of the hose reel 8. In comparison, when rotating counterclockwise, the amount of pulling that needs to be done is smaller, and the amount of work that needs to be done against the winding force is also smaller.

[0062] In addition, depending on the arrangement of the equipment and parts on the boom 4 and jib 6, or the surrounding conditions during work, there may be an object in front of the drum unit 10, making it difficult to secure space for rotating the drum unit 10 counterclockwise. If the drum unit 10 is designed to rotate clockwise as in the first embodiment, the drum unit 10 can be raised with a minimum amount of movement, and no additional work is required to secure space for rotation.

[0063] In this way, regardless of the type of hose reel 8, it is easier to rotate the drum unit 10 counterclockwise than clockwise when raising the drum unit 10. However, when rotating the drum unit 10 counterclockwise, since the guide ring 14 is located within the rotation range of the drum unit 10, depending on the state of the guide ring 14, there is a risk that the components of the drum unit 10 may interfere with the guide ring 14.

[0064] Here, as in the first embodiment, when guide ring 14 is opened, second columnar member 18 forming the side edge of the annular structure and third columnar member 19 forming the bottom edge are configured to retract upward, so that even if a component of drum unit 10 approaches guide ring 14, as shown in Figure 16, the component is retracted from the rotation range of drum unit 10 due to the opening of guide ring 14, and therefore rotation operation of drum unit 10 can be performed without hindrance.

[0065] 13 to 15, in order to retract the guide ring 20 from the rotation range of the drum unit 10, a separate mechanism is required to change the attitude and position of the guide ring 20, as shown in Fig. 17. With the guide ring 14 of the first embodiment, the members can be retracted simply by opening the annular structure, but with the guide ring 20 of the reference example, a mechanism to change the attitude and position of the guide ring 20 is required in addition to the opening and closing structure of the annular structure, which makes the structure more complex and increases manufacturing costs.

[0066] In addition, in this first embodiment, the rotation axis 17b is located at the height of the upper first columnar member 17. As a result, when the guide ring 14 is opened, the amount by which the third columnar member 19 protrudes downward is reduced. For example, assuming that the rotation axis of the third columnar member 19 is set at the tip of the second columnar member 18, the third columnar member 19 protrudes downward from the second columnar member 18 by the length of the third columnar member 19 during opening and closing. However, if the rotation axis is set at a higher position as in the present doctor's embodiment, the amount by which the third columnar member 19 protrudes is reduced accordingly. Therefore, when opening and closing, the third columnar member 19 is less likely to interfere with the hydraulic hose 7 located below the guide ring 14, making the opening and closing operations easier.

[0067] In addition, in the case of the first embodiment, the lock pin 19b as the attachment / detachment mechanism is built into the third columnar member 19, so that the overall configuration can be made compact on the premise of the opening and closing operation of the guide ring 14. For example, assuming that a lock pin is provided as the attachment / detachment mechanism so as to be inserted and removed along the front-rear direction, in addition to the lock pin itself requiring a dimension in the front-rear direction, it is necessary to secure a space required for the insertion and removal operation, and a front-rear distance must be provided between the multiple guide rings. This makes it difficult to properly arrange the guide rings at the tip of each cylinder of the boom that is crowded when contracted. By doing as in the first embodiment, the front-rear dimension required for the attachment / detachment mechanism can be minimized, and the guide ring 14 can be easily arranged at the tip of the cylinder 5. In addition, since the operation of the lock pin 19b is performed in a direction perpendicular to the front-rear direction, there is no interference with the front and rear guide rings 14 during operation, making the operation easy.

[0068] 18 and 19 show another form assumed as a guide ring as a second embodiment of the present invention. The guide ring 30 is common to the guide ring 14 of the first embodiment in that the base member 16 is provided with first to third columnar members 31 to 33 to form an annular structure, and the annular structure is opened and closed by opening and closing the second and third columnar members 32, 33 relative to the first columnar member 31. However, the guide ring 30 differs from the guide ring 14 of the first embodiment in that the attachment and detachment mechanism is provided not in the third columnar member 33 forming the lower side, but in the second columnar member 32 forming the side side. In the case of this second embodiment, the base member 16 is not provided with an engagement hole that engages with the third columnar member 33. The third columnar member 33 is provided with a cylindrical roller 33a so as to cover the outer circumferential surface, similar to the third columnar member 19 in the first embodiment.

[0069] The second columnar member 32 includes a cylinder 32a, a lock pin 32b, a grip portion 32c, and a biasing body 32d as an attachment / detachment mechanism, and is configured by housing a rod-shaped lock pin 32b inside the cylindrical body 32a that forms the outer shell.

[0070] The cylindrical body 32a is attached to a support portion 31a provided at the tip of the first columnar member 31 so that the base end of the cylindrical body 32a can rotate around a rotation axis 31b. The second columnar member 32 is supported by the rotation shaft 31b so as to be freely raised and lowered with respect to the first columnar member 31. The support portion 31a is a plate-like member provided so as to protrude upward from the tip of the first columnar member 31 along the surface of the annular structure of the guide ring 30, and the rotation shaft 31b is provided on this support portion 31a above the first columnar member 31. The cylindrical body 32a of the second columnar member 32 is rotatably supported with respect to the first columnar member 31 by sandwiching the support portion 31a in a notch provided on the base end and allowing the rotation shaft 31b to pass through the components of the cylindrical body 32a and the support portion 31a.

[0071] An engagement groove 31c is provided on the lower side of the support portion 31a as an engagement portion that engages with the lock pin 32b of the second columnar member 32. The engagement groove 31c has a concave structure that opens toward the lower side of the support portion 31a so that the base end of the lock pin 32b can be accommodated therein.

[0072] The lock pin 32b housed inside the cylindrical body 32a is disposed so that both ends protrude outward in the axial direction from both ends of the cylindrical body 32a. The tip of the lock pin 32b protrudes from the tip of the third columnar member 33 on the side opposite to the side where the main part of the second columnar member 32 is provided, and a ring-shaped grip part 32c is attached to the protruding part.

[0073] A biasing body 32d is disposed between the outer peripheral surface of the lock pin 32b housed in the cylindrical body 32a and the inner peripheral surface of the cylindrical body 32a, and biases the lock pin 32b from the tip side toward the base side with respect to the cylindrical body 32a. The base end of the lock pin 32b is pressed against the support portion 31a of the first columnar member 31 by the biasing force of the biasing body 32d.

[0074] 18, when the guide ring 30 is closed, the base end of the lock pin 32b engages with an engagement groove 31c provided on the underside of the support portion 31a and is biased against the support portion 31a in this state, so that the annular structure of the guide ring 30 is held in a closed state.

[0075] When the gripping portion 32c provided at the tip of the lock pin 32b is gripped and the lock pin 32b is pulled toward the tip against the biasing force of the biasing body 32d, the base end of the lock pin 32b is pulled toward the tip side of the cylindrical body 32a and comes out of the engagement groove 31c of the support part 31a, and the engagement is released. When the engagement is released, the second columnar member 32 and the third columnar member 33 can be rotated around the rotation axis 31b, and the guide ring 30 can be opened as shown in FIG.

[0076] When the lock pin 32b is released in the guide ring 30 in the open state, the lock pin 32b is pressed against the support portion 31a again by the biasing force of the biasing body 32d, and the guide ring 30 is held in the open state. In this way, in the case of the second embodiment, the second columnar member 32, which is directly and rotatably connected to the first columnar member 31, is provided with an attachment / detachment mechanism, and the attachment / detachment mechanism holds the second columnar member 32 against the first columnar member 31 by the biasing force, so that the guide ring 30 can be held in the open state without providing a structure such as the shoulder portion 17c (see FIG. 3) in the first embodiment. The position at which the second columnar member 32 is held in the open state of the guide ring 30 is not limited to the position shown here. For example, it can be held at the position of the second columnar member 18 in FIG. 11 (even in this case, the posture of the second columnar member 32 is held by the biasing force, so a structure such as the shoulder portion 17c is not necessary).

[0077] When closing the guide ring 30, as the second columnar member 32 is closed, the lock pin 32b is pushed in by the support portion 31a, which abuts against the tip, against the biasing force of the biasing body 32d. When the guide ring 30 is completely closed, the position of the lock pin 32b coincides with the engagement groove 31c, and the tip of the lock pin 32b protrudes from the tip of the cylindrical body 32a due to the biasing force of the biasing body 32d and engages with the engagement groove 31c. Therefore, when closing the guide ring 30, it is not necessary to operate the lock pin 32b by the grip portion 32d. In this way, even with the second columnar member 32, the opening and closing of the guide ring 30 can be easily switched by the attachment / detachment mechanism.

[0078] Similarly to the first embodiment (see Figs. 3 to 12), the guide ring 30 of the second embodiment also allows the hydraulic hose 7 to be easily replaced by opening the lower side of the annular structure. Also, similar to the first embodiment, the lock pin 32b serving as the attachment / detachment mechanism is built into the columnar member (in the case of the second embodiment, the second columnar member 32, not the third columnar member 33), so that the overall configuration can be made compact, assuming that the guide ring 30 is opened and closed.

[0079] Furthermore, in the case of the second embodiment, as described above, the first columnar member 31 is provided with the support portion 31a, and the rotation shaft 31b is supported by this support portion 31a above the axis of the first columnar member 31. If the rotation shaft 31b that forms the center of rotation of the second columnar member 32 is supported upward, the second columnar member 32 and the third columnar member 33 that rotate relative to the first columnar member 31 can be retracted upward in the open state. This makes it possible to more reliably avoid interference between the drum unit 10 and the guide ring 30 when rotating the drum unit 10, and interference between the third columnar member 33 and the hydraulic hose 7 when opening the guide ring 30.

[0080] 20 and 21 show yet another possible form of the guide ring. The guide ring 40 of this third embodiment is common to the guide rings 14 and 30 of the first and second embodiments in that the base member 16 is provided with first to third columnar members 41 to 43 to form an annular structure, and that a cylindrical roller 33a is provided to cover the outer circumferential surface of the third columnar member 43. However, the third embodiment is different from either of the above embodiments in that the opening and closing of the guide ring 40 is performed by a sliding action rather than a rotation.

[0081] The guide ring 40 of the third embodiment is provided with a fixed shaft 41a and a movable cylinder 41b that are axially slidable relative to each other as a sliding mechanism on the first columnar member 41. The base end of the fixed shaft 41a is fixed to the base member 16. The movable cylinder 41b is a cylindrical member that covers the outer circumferential surface of the fixed shaft 41a, and the base end of the second columnar member 42 is fixed to its tip. The base end of the third columnar member 43 is fixed to the tip of the second columnar member 42, and the second columnar member 42 and the third columnar member 43 slide along the axial direction of the first columnar member 41 together with the movable cylinder 41b, so that the guide ring 40 can be easily opened and closed.

[0082] Furthermore, an engagement hole 41c is provided at the tip of the fixed shaft 41a as an engagement portion that engages with the attachment / detachment mechanism of the second columnar member 42. The engagement hole 41c is a hole provided along the axial direction of the second columnar member 42, and is adapted to receive a lock pin 42b provided on a lock body 42a inside the second columnar member 42, as described below.

[0083] The tip of the fixed shaft 41a is tapered so that the diameter decreases toward the tip side.

[0084] The second pillar 42 includes a lock body 42a and a biasing body 42c therein as an attachment / detachment mechanism for the first pillar 41, and further includes an operating groove 42d and a grip portion 42e for operating these.

[0085] The locking body 42a is a cylindrical object accommodated in the internal space of the second columnar member 42, and a lock pin 42b protruding toward the base is provided on the end face on the base side. A biasing body 42c, which is a coil spring, is accommodated in a position on the tip side of the locking body 42a in the internal space of the second columnar member 42, and biases the locking body 42a toward the base side with respect to the second columnar member 42. An operating groove 42d is provided along the axial direction in the side wall of the portion of the second columnar member 42 that accommodates the locking body 42a to communicate between the inside and the outside, and a gripping portion 42e is provided on the side surface of the locking body 42a so as to protrude to the outside through the operating groove 42d.

[0086] When the guide ring 40 is in a closed state, the movable cylinder 41b of the first columnar member 41, the second columnar member 42, and the third columnar member 43 are located at positions closest to the fixed shaft 41a and the base member 16. The locking body 42a housed in the second columnar member 42 is biased against the fixed shaft 41a with the locking pin 42b fitted into the engagement hole 41c at the tip of the fixed shaft 41a, thereby holding the guide ring 40 in a closed state.

[0087] When opening the guide ring 40 from this position, first, the gripping portion 42e protruding from the side surface of the second columnar member 42 is gripped, and the second columnar member 42 is moved toward the tip side along the operating groove 42d against the biasing force of the biasing body 42c. This operation moves the locking body 42a toward the tip side inside the second columnar member 42, and the locking pin 42b provided at the base end of the locking body 42a is removed from the engagement hole 41c, and the engagement is released. When the engagement is released, the movable cylinder 41b of the first columnar member 41 is slid together with the second columnar member 42 and the third columnar member 43 in a direction away from the base member 16, and the guide ring 40 can be opened as shown in FIG. 21. The guide ring 40 in this open state is maintained in the open state without the application of any particular force.

[0088] When closing the guide ring 40, from this state, the movable cylinder 41b of the first columnar member 41 is slid together with the second columnar member 42 and the third columnar member 43 in the direction toward the base member 16. At this time, since the tip of the fixed shaft 41a is formed in a tapered shape as described above and a slope is formed in the diagonally lower part facing the lock pin 42b, when the tip of the lock pin 42b abuts on this slope, a downward force is applied to the lock body 42a along the axial direction. As a result, even without gripping the grip part 42e and operating the lock body 42a, by simply pushing the movable cylinder 41b and the second and third columnar members 42 and 43 toward the base member 16, the lock body 42a moves toward the tip side within the second columnar member 42 against the biasing force of the biasing body 42c, and the movable cylinder 41b and the second and third columnar members 42 and 43 can be slid without being hindered by the lock pin 42b. When the movable cylinder 41b reaches a position closest to the base member 16 relative to the fixed shaft 41a, the position of the lock pin 42b matches with the engagement hole 41c of the fixed shaft 41a, and the lock body 42a is pushed toward the base side by the biasing force of the biasing body 42c, and the lock pin 42b fits into the engagement hole 41c. In this way, the guide ring 40 is again held in a state where the annular structure is closed.

[0089] Similarly to the first and second embodiments (see Figs. 3 to 12 and Figs. 18 and 19), the guide ring 40 of the third embodiment also allows the hydraulic hose 7 to be easily replaced by opening the lower side of the ring structure. In addition, a mechanism for opening and closing the guide ring 40 is adopted in which some members slide in a direction perpendicular to the front-rear direction, so that the dimensions in the front-rear direction are small and opening and closing operations are easy. In addition, because some members do not protrude downward from their positions in the closed state when opening and closing, interference between the third columnar member 43 and the hydraulic hose 7 can be avoided when opening the guide ring 40.

[0090] The first to third embodiments described above may be modified as appropriate, for example, by changing the specifications of the details or by combining the respective configurations as appropriate. For example, in the first embodiment, a support part may be provided at the tip of the first columnar member as in the second embodiment, and the rotation axis may be set upward, or in the third embodiment, the attachment / detachment structure may be set at the fixed axis of the first columnar member and at the intermediate part of the movable cylinder. In addition to a mechanism using a biasing body such as a coil spring, various mechanisms can be assumed for the attachment / detachment mechanism as long as the movable part can be engaged with the fixed part. For example, a mechanism for attachment / detachment by inserting or removing a pin or the like in a direction perpendicular to the surface of the ring structure into or from a hole provided at the connection part between the columnar members can be considered. In addition, the slide mechanism may be a mechanism in which the shaft housed in the cylinder slides relative to the cylinder fixed to the base member, for example, in the opposite manner to the third embodiment. In addition, the component configuration of the guide ring, the structure for opening and closing (rotation mechanism and slide mechanism), the configuration and position of the attachment / detachment mechanism, etc. can be changed as appropriate.

[0091] As described above, the hose guide mechanism of each of the above-mentioned embodiments is installed on the boom 4 of the construction machine (vehicle crane) 1, and includes the guide rings 14, 30, 40 that restrain the hose (hydraulic hose) 7 arranged along the boom 4 inside the annular structure, and the guide rings 14, 30, 40 are configured so that the bottom side of the annular structure is open. In this way, during the work of replacing the hose 7, the member corresponding to the bottom side (third columnar member 19, 33, 43) retreats from the lower part of the guide ring 14, so that the hose 7 located below the guide ring 14 can be stored inside the guide ring 14 without being obstructed by the components of the guide ring 14.

[0092] In each embodiment, the guide ring 14, 30, 40 is configured to include a first pillar member 17, 31, 41 that forms the upper side and is attached to the boom 4 side, a second pillar member 18, 32, 42 that forms the side side, and a third pillar member 19, 33, 43 that forms the lower side. In this way, the guide ring 14, 30, 40 with a simple configuration can achieve the above-mentioned functions and effects.

[0093] In some embodiments, the second pillars 18, 32, together with the third pillars 19, 33, are rotatable relative to the first pillars 17, 31. In this manner, the guide rings 14, 30 can be opened and closed using a simple mechanism.

[0094] In some embodiments, the first columnar member 31 has a support portion 31a that supports the rotation axis 31b of the second columnar member 32 above the axis of the first columnar member 31. In this way, the second columnar member 32 forming the side edge and the third columnar member 33 forming the bottom edge can be retracted further upward in the open state, which makes it possible to more reliably avoid interference between the drum unit 10 and the guide ring 30 when rotating the drum unit 10.

[0095] Some of the embodiments include a base member 16 to which the first pillar member 17 is fixed, and the third pillar member 19 includes an attachment / detachment mechanism (cylinder 19a, lock pin 19b, grip 19c, biasing body 19d) that can engage with the base member 16. In this way, the guide ring 14 can be easily switched between open and closed.

[0096] In some embodiments, the first columnar member 17 is provided with a shoulder portion 17c on which the second columnar member 18 can be temporarily placed. In this way, by temporarily placing the first columnar member 18 on the shoulder portion 17c, the lower side can be kept open without having to hold the components of the guide ring 14, making the work even easier.

[0097] In some embodiments, the second columnar member 32 is provided with an attachment / detachment mechanism (the cylinder 32a, the lock pin 32b, the gripping portion 32c, and the biasing member 32d) that can engage with the first columnar member 31. This also makes it possible to easily switch between opening and closing the guide ring 30.

[0098] In some embodiments, when the guide ring 30 is in an open state, the second columnar member 32 can be held relative to the first columnar member 31 by the biasing body 32d provided on the second columnar member 32. In this manner, the guide ring 30 can be easily switched between being opened and closed.

[0099] In some embodiments, the first columnar member 41 is provided with a slide mechanism (fixed shaft 41a, movable cylinder 41b) configured to allow the second columnar member 42 and the third columnar member 43 to slide along the axial direction of the first columnar member 41. This also makes it possible to easily switch between opening and closing the guide ring 40.

[0100] Furthermore, in each embodiment, the above-described hose guide mechanism is applied to the construction machine 1, so that the same operational effects as those described above can be achieved in the construction machine 1.

[0101] Therefore, according to each of the above-described embodiments, the task of replacing the hose can be easily performed.

[0102] The hose guide mechanism and construction machine of the present invention are not limited to the above-mentioned embodiment. For example, in the above embodiment, a vehicle-type crane equipped with a telescopic jib was assumed as the construction machine, but the present invention can be applied to other types of construction machines. For example, cranes not equipped with a telescopic jib, non-vehicle-type cranes, and even construction machines other than cranes, such as aerial work vehicles, can be assumed as possible applications. The present invention can be applied to various construction machines as long as they are equipped with a mechanism for attaching a hose, such as a hydraulic hose, to a boom. Of course, various modifications can be made to the embodiment without departing from the gist of the present invention. [Explanation of symbols]

[0103] 1. Construction machinery (vehicle crane) 4. Boom 7 Hose (hydraulic hose) 14 Guide ring 16 Base material 17 First columnar member 17c Shoulder 18 Second columnar member 19 Third columnar member 19a Attachment and detachment mechanism (cylindrical body) 19b Detachable mechanism (lock pin) 19c Attachment and detachment mechanism (grip part) 19d Detachable mechanism (biasing body) 30 Guide Ring 31 First columnar member 31b Rotation axis 32 Second columnar member 32a Attachment and detachment mechanism (cylindrical body) 32b Detachable mechanism (lock pin) 32c Attachment / detachment mechanism (grip part) 32d Detachable mechanism (biasing body) 33 Third columnar member 40 Guide Ring 41 First columnar member 41a Slide mechanism (fixed shaft) 41b Slide mechanism (movable barrel) 42 Second columnar member 43 Third columnar member

Claims

1. A guide ring is provided on a boom of a construction machine and restrains a hose arranged along the boom inside a ring structure, The guide ring is a hose guide mechanism configured so that a lower side of the annular structure is open, The guide ring is A first columnar member that forms an upper side and is attached to the boom side; A second columnar member forming a side edge; and a third columnar member forming a lower side, The first columnar member has a support portion that supports a rotation shaft that pivotally supports the second columnar member so that the second columnar member can be tilted up and down, above the axis of the first columnar member. A hose guide mechanism characterized by:

2. The second columnar member is configured to be rotatable with respect to the first columnar member together with the third columnar member.

2. The hose guide mechanism according to claim 1 .

3. a base member to which the first columnar member is fixed; The third columnar member is provided with an attachment / detachment mechanism that can be engaged with the base member.

3. The hose guide mechanism according to claim 2, wherein

4. The first columnar member has a shoulder portion on which the second columnar member can be temporarily placed.

4. The hose guide mechanism according to claim 3.

5. The second columnar member is provided with an attachment / detachment mechanism that can be engaged with the first columnar member.

3. The hose guide mechanism according to claim 2, wherein

6. When the guide ring is in an open state, the second columnar member is configured to be held relative to the first columnar member by a biasing body provided on the second columnar member.

6. The hose guide mechanism according to claim 5,

7. A construction machine comprising the hose guide mechanism according to any one of claims 1 to 6.

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