Lifting jig for side frame of construction machine

Abstract

To provide a lifting jig for a side frame of a construction machine capable of lifting a side frame, which composes a traveling body, integrally with a crawler having a rubber pad attached thereto.SOLUTION: A lifting jig for a side frame includes: four hanger members 54 that are respectively detachably attached to both ends of a traveling body in a width direction with respect to two crawler shoes 42 of a crawler spaced apart from each other in a longitudinal direction of the traveling body; and four suspension ropes one end of each of which is attached to a suspension hook of a crane and the other end of each of which is attached to each of the hanger members via a shackle 56. Each hanger member has a hollow frame 61 formed by combining a pair of upper and lower vertical plates 59, and a pair of side plates 60, front and rear, extending between the upper and lower plates. Respective ends of the crawler shoe 42 and a rubber pad 47 passed through the frame are protruded from one end 61a of the frame, and the other ends 63a, opposite to the one end of the frame, are brought into contact with and attached to a shoe coupling portion 43.SELECTED DRAWING: Figure 17

Description

[Technical field]

[0001] The present invention relates to a lifting jig for a side frame of a construction machine, and more particularly to a lifting jig used when lifting a side frame that constitutes a crawler-type running body with a rope. [Background technology]

[0002] Metal crawlers used as the undercarriage of various construction machines have multiple crawler shoes (also called iron shoes or shoe plates) connected endlessly by link pins, and the outer surfaces (contact surface sides) of the crawler shoes are formed so that rubber pads can be attached for the purpose of protecting the paved road surface, etc. The rubber pads are attached in such a way that the head of a bolt is embedded integrally with the core material inside the rubber pad, and the threaded portion of the bolt protruding from the mounting surface of the rubber pad is fastened with a nut through a hole in the crawler shoe (see, for example, Patent Document 1).

[0003] Among various types of construction machinery, large pile drivers and cranes that require disassembly for transportation are not planned to run on paved roads, so there is no need to attach rubber pads to the outer surface of the crawler shoe, and the crawler shoe itself is used as a lifting point when hoisting the side frame (also called the crawler frame) that constitutes the running body in its component state. In this case, it is usually performed using a so-called four-point lifting method using a lifting device (hook) called a hanger (for example, see Patent Document 2).

[0004] When hoisting the side frame, as shown in Fig. 20, two paired hoisting tools 102, 102 are hooked to both ends of the crawler shoe 101 in the travelling body width direction (left and right direction in Fig. 20), and wire ropes 104, 104 are attached to the two hoisting tools arranged opposite each other via shackles 103, 103. Here, a bolt 105 to prevent the hoisting tool 102 from shifting or falling off is passed through hole 101a of crawler shoe 101, which was originally provided for the purpose of attaching a rubber pad. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Japanese Patent Application Publication No. 7-291159 [Patent Document 2] JP 2020-6809 A Summary of the Invention [Problem to be solved by the invention]

[0006] Recently, due to the tightening of weight restrictions during transportation, it has become necessary to disassemble the running body for transportation, i.e., remove the side frames, even for medium-sized construction machines, which was not necessary in the past. However, since holes in the crawler shoes of medium-sized construction machines are used to attach rubber pads, it is necessary to attach and remove the rubber pads when using conventional lifting tools, which causes a problem of impaired workability.

[0007] SUMMARY OF THE PRESENT EMBODIMENT An object of the present invention is to provide a lifting jig for a side frame of a construction machine that is capable of lifting the side frame that constitutes the running body together with the crawler equipped with a rubber pad. [Means for solving the problem]

[0008] In order to achieve the above-mentioned object, the side frame lifting jig of the present invention is a side frame lifting jig used to lift a side frame that constitutes the running body of a construction machine together with a crawler in which a number of crawler shoes, each having rubber pads attached to their outer surfaces, are connected endlessly at a shoe connection part via a joint pin, and the side frame lifting jig is characterized in that it comprises four hanger members that are detachably attached to both ends of the running body in the width direction of the two crawler shoes that are spaced apart in the fore-and-aft direction of the running body of the crawler, and four lifting ropes, one end of which is attached to a lifting hook of a crane and the other end of which is attached to each hanger member via a shackle, and the hanger members are formed by combining a pair of upper and lower upper plates and a pair of front and rear side plates that are stretched between the upper and lower plates to form a hollow frame, and each end of the crawler shoes and the rubber pads that are passed through the frame protrude from one end of the frame, and the other end opposite to the one end of the frame abuts the shoe connection part to be in an attached state.

[0009] The other end of the frame includes a notched end formed by cutting out a part of the side plate, and the hanger member is in an attached state by abutting the notched end against the shoe connecting portion.Furthermore, the hanger member is provided with a stopper rope that prevents the two hanger members arranged opposite each other in the width direction of the traveling body from moving apart in the attached state.In addition, the lower plate is provided with an opening that overlaps in the vertical direction with a bolt used to attach the rubber pad to the crawler shoe in the attached state. Effect of the Invention

[0010] According to the lifting jig for a side frame of a construction machine of the present invention, the hanger member detachably attached to the crawler shoe forms a hollow frame by combining a pair of upper and lower plates, one above the other, and a pair of front and rear side plates that are placed between the upper and lower plates, making it possible to obtain a strong frame with a closed cross-sectional structure closed by the upper and lower plates and the pair of front and rear side plates while taking into account the thickness of the rubber pad in the vertical direction. This makes it possible to easily and safely lift the side frame by passing the crawler shoe with the rubber pad attached through the frame of the hanger member.

[0011] In particular, since the ends of the crawler shoe and rubber pad passed through the frame protrude from one end of the frame, and the other end opposite the one end of the frame abuts the shoe connection portion to enter the attached state, not only can the setup work for setting the hanging jig on the crawler be carried out quickly, but the quality of the attachment can be easily determined simply by checking the degree to which the crawler shoe and rubber pad protrude from the frame, resulting in a hanging jig for a side frame that meets the needs of sites where safety is required. [Brief description of the drawings]

[0012] [Figure 1] 1 is a side view of a pile driver to which a side frame lifting jig is applied, showing one embodiment of the present invention. FIG. [Diagram 2] FIG. [Diagram 3] FIG. [Figure 4] FIG. [Diagram 5] This is also a side view. [Figure 6] FIG. [Figure 7] FIG. [Figure 8] FIG. [Figure 9] IX-IX cross-sectional view of FIG. 6. [Figure 10] FIG. 4 is a side view showing the transport posture of the pile driver. [Figure 11] FIG. 11 is a side view showing the state in which the side frame hanging jig is set on the crawler. [Figure 12] FIG. [Figure 13] FIG. 2 is a perspective view of the hanger member as viewed from one direction. [Figure 14] FIG. 14 is a perspective view of the hanger member as viewed from the opposite direction to that of FIG. 13. [Figure 15] FIG. 4 is a side view showing the attachment state of the hanger member to the crawler shoe. [Figure 16] FIG. [Figure 17] FIG. [Figure 18] FIG. 18 is a cross-sectional view taken along line XVIII-XVIII of FIG. 15. [Figure 19] FIG. 13 shows the same suspended state with the side frame removed from the truck frame. [Figure 20] FIG. 1 is a partial cross-sectional front view showing the attachment state of two hanger members arranged opposite to each other at both ends of a crawler shoe in the travelling body width direction in the prior art. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0013] Figures 1 to 19 show the side frame lifting jig of the present invention and the construction machine in which it is used, and Figures 1 to 3 show the working posture of a medium-sized pile driver, which is an example of construction machine. The pile driver 11 is equipped with a base machine (machine body) 15 consisting of a crawler-type lower running body 12 and an upper rotating body 14 that is rotatably mounted on the lower running body 12 via a swivel bearing 13, a leader 16 erected at the front of the upper rotating body 14, and a hoisting cylinder 17 that supports the leader 16 from the rear.

[0014] A leader support 18 that supports the leader 16 so that it can be raised and lowered is provided at the front of the upper rotating body 14. In addition, stabilizing jacks 19 with adjustable tension width are provided at four locations on the front, rear, left and right sides of the upper rotating body 14, and a counterweight 20 for balancing the pile driver 11 is mounted at the rear end of the upper rotating body 14.

[0015] The leader 16 is divided into a rotatable basic leader 21 pivotally supported by the leader support 18, an upper leader 22 connected to the upper part of the basic leader 21, and a lower leader 23 connected to the lower part of the basic leader 21. The upper leader 22 is further divided into a plurality of leader members, and a top sheave 24 is attached to the upper end. The flange members at the upper and lower ends of each leader member are detachably connected to each other by bolts and nuts. A rotary drive device (not shown) is attached to the front of the leader 16 so that it can be raised and lowered.

[0016] The upper rotating body 14 has a machine frame in which a rectangular box-shaped main frame 25, on whose underside the rotating bearing 13 is attached, and floor frames 26 (opposite side not shown) framed on both sides in the width direction of the main frame 25 are integrally connected. An operator's cab 27 in which an operator sits is provided at the front of the right floor frame. Also, an equipment housing house (not shown) that houses hydraulic equipment is provided at the rear of the right floor frame. Meanwhile, an engine housing house 28 that houses an engine power unit and associated equipment such as an exhaust gas purification device is provided on the left floor frame 26.

[0017] Each house 28 is formed in a box shape by a frame structure integrated with a rectangular (C-shaped cross section) floor frame 26 and a sheet metal structure that provides the exterior, and is equipped with a stand frame that defines the storage space and a plurality of cover members including doors that are attached to the stand frame. In each house 28, the position of the outer side where the door is located is usually aligned with the outer surface of the floor frame 26 and corresponds to the width (transport width) of the upper rotating body 14.

[0018] As shown in Figures 4 and 5, the lower running body 12 is equipped with a track frame consisting of a center frame 29 having a swivel bearing 13, a pair of axles (shafts) 30, 30 respectively provided at the front and rear of the center frame 29 in the fore-and-aft direction of the running body (left-right direction in Figure 4), a pair of side frames 31, 31 supported on both ends of the axles 30, 30 so as to be slidable in the width direction of the running body (up-down direction in Figure 4), and a pair of spanner cylinders 32, 32 that expand and contract the side frames 31 along the axles 30.

[0019] The side frame 31 has a pair of axle insertion holes 31a, 31a in the longitudinal direction of the vehicle through which the axle 30 can be inserted, and a cylinder insertion hole 31b provided in the middle between the axle insertion holes 31a, through which the spanner cylinder 32 can be inserted. With the side frame mounting portion 30a of the axle 30 inserted into the axle insertion holes 31a and the spanner cylinder 32 inserted into the cylinder insertion hole 31b, a piston rod terminal portion 32a of the spanner cylinder 32 is connected by a cylinder pin 34 to a bracket 33 provided on the side surface (outer surface) of the side frame 31.

[0020] The side frame 31 is pin-connected to the truck frame via a pair of links 35, 35 in the longitudinal direction of the vehicle body, which are provided on the front surface of the front axle 30 and the rear surface of the rear axle 30, respectively. The link 35 is a plate-like member extending along the length of the axle 30 and has a number of pin holes for determining the position in the width direction of the vehicle body relative to the truck frame. By inserting link pins 36 into the pin holes, the side frame 31 can be moved to a position where the spanner cylinder 32 is extended to cause the side frame 31 to protrude outward in the width direction of the vehicle body (installation position), as shown in the upper part of Fig. 4, or to a position where the spanner cylinder 32 is contracted to cause the side frame 31 to be stored inward in the width direction of the vehicle body (temporary support position during assembly and disassembly), as shown in the lower part of Fig. 4.

[0021] A sprocket wheel 37 serving as a drive wheel is provided at the rear end of the side frame 31, and an idler wheel 39 serving as an idler wheel for adjusting the tension of the crawler 38 is provided at the front end of the side frame 31. A plurality of rollers 40 are provided at the upper and lower parts of the side frame 31, and a pair of front and rear upper guides 41 are provided at positions corresponding to the axles 30 of the track frame.

[0022] As shown in Figures 5 to 9, the crawler 38 is made by connecting multiple metal crawler shoes 42 endlessly at shoe connecting parts 43 via joint pins 44 and wrapping them around the sprocket wheel 37 and idler wheel 39 (Figure 5). The crawler shoe 42 comprises a rectangular base plate 42c (Figure 9) having a long side 42a in the width direction of the running body (left-right direction in Figure 7) and a short side 42b in the fore-aft direction of the running body (up-down direction in Figure 7), shoe connecting portions 43, 43 protruding in the fore-aft direction of the running body from the long side 42a of the base plate 42c and connected to adjacent crawler shoes 42 by joint pins 44, a pair of rubber pad retaining pieces 42d, 42d protruding toward the outer surface of the base plate (upward in Figure 6) along each long side 42a of the base plate 42c, an engagement protrusion 42e protruding from the center of the inner surface of the base plate 42c, and recesses 42f, 42f for attaching rubber pad fixing bolts formed on the inner surface of the end portion of the short side 42b of the base plate 42c. Between the two rubber pad holding pieces 42d, 42d, an intermediate holding piece 42g is provided in parallel thereto, and each rubber pad fixing bolt attachment recess 42f is provided with a bolt insertion hole 42h (FIG. 9). Furthermore, a pair of front and rear walls 42i, 42i forming the rubber pad fixing bolt attachment recess 42f are provided protruding on opposite sides above and below the rubber pad holding pieces 42d, 42d, and are inclined so that their thickness gradually decreases in the vertical direction from the base end side toward the tip end side in the travel body width direction.

[0023] The shoe connecting portion 43 has two first engaging protrusions 42j, 42j protruding from one long side 42a and three second engaging protrusions 42k, 42k, 42k protruding from the other long side 42a at positions sandwiching the first engaging protrusions 42j, 42j from both sides, and a pin insertion hole 42m penetrating in the width direction of the running body is formed in each of the engaging protrusions 42j, 42k (FIG. 8). In addition, protruding pieces 42p having through holes 42n for attaching joint pin retaining bolts 45 are provided on the outer sides of the second engaging protrusions 42k located at both ends in the width direction of the running body.

[0024] The crawler shoes 42 are connected by inserting the first engagement protrusions 42j, 42j protruding from adjacent crawler shoes 42 into the two recesses formed between the second engagement protrusions 42k, 42k, 42k so that the two engagement protrusions are engaged, inserting the joint pins 44, 44 from both sides into the pin insertion holes 42m, and fastening the joint pin retaining bolts 45 inserted into the through holes 42n with nuts 46 to retain the joint pin 44. When the front and rear crawler shoes 42, 42 are connected to each other in this manner, the width (L1) of the shoe connecting portion 43 is slightly narrower than the width (L2) of the crawler shoes 42, which determines the maximum width of the crawler 38, and as shown in FIG. 8, the relationship between the two is approximately L1 / L2=3 / 4.

[0025] The crawler 38 attached to the side frame 31 is driven by the engagement protrusion 42e engaging with the engagement recess 37a of the sprocket wheel 37, as shown in FIG. 5, and the engagement protrusion 42e is guided by the grooves (not shown) of the idler wheel 39, the roller 40 and the upper guide 41 to circulate around the outer periphery of the side frame 31.

[0026] The rubber pad 47 attached to the outer surface of the crawler shoe 42 is made of synthetic rubber such as urethane, and the mounting surface (inner surface) opposite the ground contact surface is provided with unevenness corresponding to the unevenness formed by the rubber pad holding pieces 42d, 42d and the intermediate holding piece 42g, and the heads of the rubber pad fixing bolts 49 are embedded in the core material 48 at both ends of each protrusion in the width direction of the running body as shown in Fig. 9. In addition, the outer surface of the rubber pad 47 is provided with a ground contact portion 47a that protrudes outward from the protruding ends of the rubber pad holding pieces 42d, 42d and the intermediate holding piece 42g. The ground contact surface of the ground contact portion 47a is provided at both ends in the width direction of the running body with inclined surfaces 47b, 47b that are chamfered to have a long overall length (length in the width direction of the running body). The rubber pad 47 formed in this manner is attached in a concave-convex fit to the outer surface of the crawler shoe 42 by inserting the rubber pad fixing bolts 49 protruding from the mounting surface into the bolt insertion holes 42h, fitting each of the convex portions into the concave portions of the crawler shoe 42, and tightening nuts 50 onto the rubber pad fixing bolts 49 protruding from the bolt insertion holes 42h.

[0027] Here, when the pile driver 11 is transported, the upper leader 22 is removed, and on the machine side, heavy objects such as the rotary drive device and the counterweight 20 are removed, and the basic leader 21 is laid down backward for transportation. Here, when disassembling the lower traveling body 12, as shown in FIG. 10, the pedestal 51 is placed directly below the jack 19 (at a total of four locations), and then the jack 19 is extended to raise the crawler 38 above the ground, and the side frames 31, 31 on both sides are sequentially removed from the track frame in the lower traveling body 12. At this time, as shown in FIG. 11 and FIG. 12, the side frame disassembly jig 52 is attached to the tip (at a total of four locations) of the side frame mounting portion 30a of the axle 30 in a predetermined procedure, and then the side frame 31 is supported by a pair of front and rear disassembly jigs 52, 52 (at two locations) (maximum extension state of the spanner cylinder 32). In this way, with a working space secured above the crawler 38, the side frame hoisting jig 53 is set on the crawler 38.

[0028] The side frame hoisting jig 53 is a jig used for four-point hoisting by hooking a hoisting tool to the crawler shoe 42 located on the upper side of the side frame 31 and using it as the hoisting point of the crane when hoisting the side frame 31 together with the crawler 38. Its specific configuration includes four hanger members 54 that are arranged opposite to each other and detachably attached to both ends of the travel body in the width direction of the two crawler shoes 42 of the crawler 38 that are spaced apart in the front-rear direction of the travel body, and four hoisting ropes (e.g., wire ropes) 57 whose one end annular parts are attached to the hoisting hook 55 of the crane and whose other end annular parts are attached to each hanger member 54 via a shackle 56. Here, the mounting positions of the four hanger members 54 are determined in consideration of the position of the center of gravity of the suspended load, which is heavier on the drive wheel side (right side in FIG. 11) than on the idler wheel side, and the front and rear hanger members 54, 54 are spaced apart from each other by, for example, the equivalent of 12 crawler shoes 42.

[0029] 13 and 14, each of the hanger members 54 has a welded structure that combines a pair of upper and lower plates 58 and 59 with a pair of front and rear side plates 60, 60 that connect the front ends and rear ends of the upper and lower plates 58, 59, and the plates 58, 59, 60 form a hollow frame 61 into which the crawler shoe 42 can be inserted and removed in the width direction of the traveling body together with the rubber pad 47. The plate ends of the frame 61 are aligned in the width direction of the traveling body to provide an outer end (one end) 61a and an inner end (the other end) 61b, and a rectangular inner frame surface 61c that corresponds to the outer shapes of the ends of the crawler shoe 42 and the rubber pad 47 is provided by the inner side plate surfaces that form a hollow space.

[0030] The upper plate 58 is positioned slightly below the upper end positions of the side plates 60, 60, and a hanging ear 62 with a pin hole 62a for attaching the shackle 56 is provided at the inner end of the upper surface in the width direction of the traveling body. The lower plate 59 is positioned slightly above the lower end positions of the side plates 60, 60 and is parallel to the upper plate 58, and an opening 59a is provided at the outer end of the traveling body in the width direction, which overlaps with the rubber pad fixing bolt 49 in the vertical direction when the hanger member 54 is attached to a predetermined position of the crawler shoe 42 (FIGS. 15 to 18). The side plate 60 has a cutout portion 63 formed by partially cutting out the inner end side of the traveling body in the width direction, and thus the overall shape is formed into a substantially U-shape. In addition, an ear 66 with a pin hole 66a for attaching a shackle 65 is provided at the upper end of one side plate surface of the side plate 60 when a non-slip rope (e.g., a wire rope) 64 is used (FIG. 17, etc.). The lugs 66 are arranged symmetrically in pairs at the front and rear with the hanging lug 62 between them.

[0031] The notch 63 is formed of a vertical notch 63a that is configured as the inner end (other end) of the frame 61, and a pair of upper and lower horizontal notches 63b, 63c that are continuous with the upper and lower ends of the vertical notch 63a, which are rounded (R). The vertical notch 63a is provided parallel to the outer end (one end) 61a of the frame 61. The upper horizontal notch 63b is positioned below the lower surface of the upper plate 58, and is provided with a gentle upward linear slope away from the lower horizontal notch 63c. On the other hand, the lower horizontal notch 63c is positioned below the upper surface of the lower plate 59, and is provided so that the angle between the vertical notch 63a and the vertical notch 63a is a right angle.

[0032] When the hanger member 54 thus formed is attached to the crawler shoe 42 to be attached, one end of each of the crawler shoe 42 and the rubber pad 47 is inserted into the frame 61 of the hanger member 54, and the upper plate 58 of the frame 61 is placed on the upper surface of the ground contact portion 47a of the rubber pad 47. The opposite side (other end) is then similarly performed, so that the two hanger members 54, 54 are attached in a pair in the travel body width direction, as shown in Figures 15 to 18. This attachment state is achieved by projecting the respective ends of the crawler shoe 42 and the rubber pad 47 inserted into the frame 61 from one end 61a of the frame 61, and abutting the other end opposite to the one end 61a of the frame 61, that is, the vertical notched ends 63a, 63a of the notched portions 63, 63 in the side plates 60, 60 against the pair of front and rear protruding pieces 42p, 42p of the shoe connecting portion 43 (Figures 15 to 17). Furthermore, when the hanger member 54 is attached, the rubber pad fixing bolt 49 and the opening 59a of the lower plate 59 are located very close to each other, and as can be seen from Figures 13, 14 and 18, when the hanger member 54 is viewed from directly below and looked up at, the tip of the bolt 49 can be seen from the opening 59a.

[0033] 17, the relationship in magnitude between the width (L1) of the shoe connecting portion 43, the width (L2) of the crawler shoe 42, the horizontal distance (L3) between the outer ends 61a, 61a of the frames 61, 61 of the two hanger members 54, 54, and the horizontal distance (L4) between the inner ends 61b, 61b of the frames 61, 61 is L2>L3>L1>L4. Here, the horizontal distance (not shown) between the vertical cutout ends 63a, 63a of the cutout portions 63, 63 corresponds to the width (L1) of the shoe connecting portion 43.

[0034] Further, the loops at both ends of the anti-slip rope 64 are detachably attached to the ears 66, 66 on either the front or rear side of the hanger members 54, 54 via shackles 65, 65, and measures are taken so that the relative positions (L2>L3>L1>L4) do not change when the hanger members 54, 54 are attached. The anti-slip rope 64 is attached with little slack between the hanger members 54, 54, and exerts an anti-slip function that prevents the hanger members 54, 54 from moving away from each other.

[0035] After the four hanger members 54 are attached to the front and rear crawler shoes 42 in this manner, one end loop of the prepared hoisting rope 57 is attached to the hoisting hook 55 of the crane, and the other end loop is attached to each hanger member 54 with a shackle 56. This sets the side frame hoisting jig 53 to the crawler 38, and the side frame 31 is in a standby state ready for hoisting by the four hoisting ropes 57 (FIGS. 11 and 12). Then, the cylinder pin 34 of the spanner cylinder 32 is removed, and the pin connection between the spanner cylinder 32 and the side frame 31 is released (the spanner cylinder 32 is in its most contracted state).

[0036] Here, when the suspending hook 55 is raised to apply tension to the four suspending ropes 57, both ends of the base plate 42c of the crawler shoe 42 are supported by the lower plates 59, 59 of the frames 61 of the hanger members 54, 54 (FIG. 18), and a force in a direction in which the two opposing hanger members 54, 54 approach each other and a force in a direction in which the front and rear hanger members 54, 54 approach each other act simultaneously as horizontal components (component forces) of the tension. This eliminates rattling in the attached state of each hanger member 54, and improves the unity between the hanger member 54 and the crawler 38. Then, the side frame 31 is moved laterally by the suspending operation of the crane while avoiding interference with the side frame disassembly jig 52.

[0037] The side frame 31 thus completely separated from the truck frame is carried onto the bed of the transport truck while maintaining a stable horizontal state, as shown in Fig. 19. The side frame hoisting jig 53 is set for the opposite side frame 31 in the same manner, and the opposite side frame 31 is removed from the truck frame by four-point suspension with hoisting ropes 57. In this case, the four hanger members 54 are transported while still attached to the side frame 31 that was later removed. In this manner, the pile driver 11 with the machine body and side frame 31 separated is transported with the side frame 31 in a component state separately from the machine body, and is used by assembling them at the site in the reverse order to that described above.

[0038] Thus, according to the construction machine side frame hoisting jig 53 of the present invention, the hanger member 54 detachably attached to the crawler shoe 42 forms a hollow frame 61 by combining a pair of upper and lower plates 58 and 59 and a pair of front and rear side plates 60, 60 stretched between the upper and lower plates 58, 59, making it possible to obtain a strong frame 61 with a closed cross-sectional structure closed by the upper and lower plates 58, 59 and the pair of front and rear side plates 60, 60 while taking into consideration the thickness of the rubber pad 47 in the vertical direction. This allows the crawler shoe 42 with the rubber pad 47 attached to be passed through the frame 61 of the hanger member 54, and the side frame 31 to be hoisted easily and safely.

[0039] In particular, each end of the crawler shoe 42 and rubber pad 47 passed through the frame 61 protrudes from one end 61a of the frame 61, and the other end 61b opposite to the one end 61a of the frame 61 (the vertical notch end 63a of the notch 63) abuts the shoe connection portion to enter the attached state. This not only enables the setup work when setting the hanging jig 53 on the crawler 38 to be completed quickly, but also makes it easy to determine whether the attachment condition is good or not simply by checking the degree to which the crawler shoe 42 and rubber pad 47 protrude from the frame 61, thereby achieving a hanging jig 53 for a side frame that meets the needs of sites where safety is required.

[0040] In addition, the other end 61b of the frame 61 includes a notch end (vertical notch end) 63a formed by cutting out a portion of the side plate 60, and the hanger member 54 is attached by abutting the notch end 63a against the shoe connection portion 43. Therefore, even if the width (L1) of the shoe connection portion 43 is close to the width (L2) of the crawler shoe 42, this does not affect the upper and lower plates 58, 59 of the frame 61, so there is no risk of the hanger member 54 becoming unstable in its attached state, and sufficient hanging margin can be obtained even in the lifted state.

[0041] Furthermore, since the hanger members 54 are provided with a locking rope 64 that prevents the two hanger members 54, 54 arranged opposite each other in the travelling body width direction from moving apart when the hanger members 54 are attached, it is possible to reliably prevent the hanger members 54 from shifting position or falling off, which contributes to the safety of the slinging work of the hoisting rope 57 and the safety of the transportation of parts. Moreover, since the ears 66, 66 for using the locking rope 64 are symmetrically arranged in pairs at the front and rear with the hoisting ear 62 between them, there is no need to consider the installation direction when attaching the four hanger members 54 to the crawler 38, making it easy to use.

[0042] Furthermore, in the lower plate 59 of the frame 61 of the hanger member 54, an opening 59a is provided which overlaps vertically with the bolt (rubber pad fixing bolt) 49 used to attach the rubber pad 47 to the crawler shoe 42 when the hanger member 54 is in the installed state. Therefore, even if the lower plate 59 comes extremely close to the bolt 49 due to manufacturing errors in parts such as the crawler shoe 42 and the rubber pad 47, it is possible to eliminate the problem of the two (parts) interfering with each other and damaging the threads of the bolt 49, which contributes to improved quality.

[0043] The present invention is not limited to the above-mentioned embodiment, and the hanging rope constituting the side frame hanging jig may be a chain, and the hanger member may be simply formed by combining plate materials. The dimensions of each part such as the frame, the hanging lug, the notch, and the applicable plate thickness can be appropriately changed according to the type and structure of the crawler (for example, the structure of the crawler shoe, the shoe connecting part, etc.), and the opening of the lower plate of the frame is also optional. In particular, the notch can be made shallow or the notch itself can be eliminated according to the difference between the width (L1) of the shoe connecting part and the width (L2) of the crawler shoe. In addition, although a pile driver is exemplified as a construction machine, the present invention is not limited to this, and can be applied to various construction machines such as cranes and earth drills equipped with rubber pads on the crawlers constituting the traveling body. [Explanation of symbols]

[0044] 11...pile driver, 12...lower running body, 13...swivel bearing, 14...upper rotating body, 15...base machine, 16...leader, 17...derailing cylinder, 18...leader support, 19...jack, 20...counterweight, 21...basic leader, 22...upper leader, 23...lower leader, 24...top sheave, 25...main frame, 26...floor frame, 27...operator cab, 28...engine housing, 29...center frame, 30...axle, 30a...side frame mounting Attachment portion, 31...side frame, 31a...axle insertion hole, 31b...cylinder insertion hole, 32...spanner cylinder, 32a...piston rod terminal portion, 33...bracket, 34...cylinder pin, 35...link, 36...link pin, 37...sprocket wheel, 37a...engagement recess, 38...crawler, 39...idler wheel, 40...roller, 41...upper guide, 42...crawler shoe, 42a...long side, 42b...short side, 42c...base plate, 42d...rubber pad retaining piece, 42 e...engagement protrusion, 42f...recess for mounting rubber pad fixing bolt, 42g...intermediate retaining piece, 42h...bolt insertion hole, 42i...wall portion, 42j...first engagement protrusion, 42k...second engagement protrusion, 42m...pin insertion hole, 42n...through hole, 42p...projection piece, 43...shoe connecting portion, 44...joint pin, 45...joint pin retaining bolt, 46...nut, 47...rubber pad, 47a...grounding portion, 47b...inclined surface, 48...core material, 49...rubber pad fixing bolt, 50...nut, 51...base, 52...disassembly jig for side frame, 53...suspension jig for side frame, 54...hanger member, 55...suspension hook, 56...shackle, 57...suspension rope, 58...upper plate, 59...lower plate, 59a...opening, 60...side plate, 61...frame, 61a...outer end, 61b...inner end, 61c...inner frame surface, 62...suspension ear, 62a...pin hole, 63...notch, 63a...vertical notch end, 63b...upper horizontal notch end, 63c...lower horizontal notch end, 64...anti-detachment rope, 65...shackle, 66...ear, 66a...pin hole

Claims

1. A side frame lifting jig is used to lift a side frame constituting a running body of a construction machine together with a crawler having a plurality of crawler shoes with rubber pads attached to their outer surfaces, which are endlessly connected at shoe connecting portions via joint pins. The crawler includes four hanger members that are detachably attached to both ends of the travelling body in the width direction of the two crawler shoes that are spaced apart in the front-rear direction of the travelling body of the crawler, and four suspension ropes each having one end attached to a suspension hook of a crane and the other end attached to each hanger member via a shackle, The hanger member is a hanging jig for a side frame, characterized in that a hollow frame is formed by combining a pair of upper and lower plates and a pair of front and rear side plates stretched between the upper and lower plates, and each end of the crawler shoe and the rubber pad passed through the frame protrudes from one end of the frame, while the other end opposite to the one end of the frame abuts against the shoe connection portion to enter an attached state.

2. the other end of the frame includes a notched end provided by cutting out a portion of the side plate, 2. The side frame hanging jig according to claim 1, wherein the hanger member is in an attached state with the notched end abutting against the shoe connecting portion.

3. 3. The side frame hanging jig according to claim 1 or 2, further comprising an anti-detachment rope that prevents the two hanger members arranged opposite each other in the width direction of the traveling body from moving apart in the attached state.

4. 3. The side frame hanging jig according to claim 1, wherein the lower plate has an opening that overlaps vertically with a bolt used to attach the rubber pad to the crawler shoe in the attached state.

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