Disintegration tool for side frame of construction machine

Abstract

To provide a disintegration tool for side frames of construction machines facilitating detachment or attachment work of a side frame for the purpose of disintegration transportation despite a simple configuration.SOLUTION: A disintegration tool 46 for side frames of a construction machine is used for supporting a side frame as a part of an axle for the purpose of hanging a side frame 32 of a travel body of a crawler traveling type from a condition where the side frame has moved to outside in a travel body width direction along an axle 31 of a truck frame. The disintegration tool includes two sub axles 47 that are detachably attached to two axles of the truck frame separated from each other in a fore-and-aft direction of the travel body. The sub axle includes an attachment plate 49 having an attachment plate surface 49a that is attached to abut on an outside surface 34a of a distal end 34 of the axle, a support plate 50 having a support plate surface 50a that communicates with a top 34d of the distal end of the axle and extends outside in the travel body width direction, and a reinforcement plate 51 to be laid between the attachment plate and the support plate.SELECTED DRAWING: Figure 16

Description

Technical Field

[0001] The present invention relates to a disassembling jig for a side frame of a construction machine, and more particularly to a disassembling jig used when lifting a side frame constituting a crawler-type traveling body with a rope.

Background Art

[0002] In a large construction machine equipped with a crawler-type traveling body, such as a large pile driver, due to weight restrictions during transportation, the side frame (also referred to as a crawler frame) is removed from the truck frame of the traveling body and transported separately, and these are assembled and used at the site. For this reason, in order to easily perform the lifting work for attaching and detaching the side frame, a bifurcated folding sub-axle (also referred to as a crawler mounting portion) provided at the tip of the axle is deployed to extend the axle of the truck frame, and the side frame can be pulled out onto the sub-axle (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] Recently, due to the strengthening of weight restrictions during transportation, even in medium-sized construction machines that did not require it conventionally, it has become necessary to disassemble and transport the traveling body, that is, to remove and transport the side frame. However, when downsizing a conventionally structured sub-axle for medium-sized use, not only does the number of parts increase, but also the weight increases, which has a problem of greatly affecting the workability in performing the disassembled transportation of the traveling body.

[0005] Therefore, an object of the present invention is to provide a disassembling jig for a side frame of a construction machine that has a simple structure and can easily perform the work of removing and attaching the side frame for disassembled transportation.

Means for Solving the Problems

[0006] In order to achieve the above object, the disassembling jig for a side frame of the present invention is a disassembling jig for a side frame of a construction machine used for supporting the side frame as a part of the axle, in order to lift the side frame of a crawler traveling type traveling body from a state where it is moved outward in the width direction of the traveling body along the axle of the truck frame. The disassembling jig for a side frame of a construction machine is provided with two sub-axles that are detachably attached to two axles spaced apart in the longitudinal direction of the traveling body of the truck frame, respectively. The sub-axle is composed of a mounting plate having a mounting plate surface that is attached in contact with the outer surface of the tip of the axle, a support plate having a support plate surface that is connected to the upper surface of the tip of the axle and extends outward in the width direction of the traveling body, and a reinforcing plate that is straddled between the mounting plate and the support plate, and is characterized in that.

[0007] Further, the mounting plate is attached to the outer surface of the tip of the axle with a plurality of bolts, and a pair of guide pins that are inserted into a pair of pin holes in the longitudinal direction of the traveling body provided at the tip of the axle are provided on the mounting plate surface. In a state where the guide pins are inserted into the pin holes, the upper surface of the tip of the axle and the support plate surface of the support plate are at the same height, which is characterized.

[0008] Furthermore, the reinforcing plate is arranged with the plate surface facing horizontally in a state where the mounting plate is attached to the outer surface of the tip of the axle, and has a cross-sectional area gradually decreasing region where the cross-sectional area gradually decreases as it goes outward from the mounting plate, and a cross-sectional area constant region where the cross-sectional area does not increase or decrease in a region continuous with the outside of the cross-sectional area gradually decreasing region. The boundary portion of each region is provided at a position that overlaps vertically with the inner end of the side frame at the lifting start position, which is characterized.

Effects of the Invention

[0009] According to the disassembling jig for the side frame of the construction machine of the present invention, in the sub-axle having a plate material as the main component, the support plate is connected to the upper surface of the tip of the axle and has a support plate surface extending outward in the width direction of the traveling body. Therefore, it is possible to impart light weight that is easy to attach and detach to the axle, and a series of operations for disassembling and transporting the traveling body can be efficiently advanced. Moreover, due to the integral structure of the mounting plate, the support plate, and the reinforcing plate, while satisfying the required support strength for the side frame, the total number of parts of the jig set can be reduced, resulting in an inexpensive and excellent manufacturability.

Brief Description of the Drawings

[0010]

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Embodiments for Carrying Out the Invention

[0011] Figures 1 to 21 show the disassembling jig for the side frame of the present invention and the construction machine in which this is used. Figures 1 to 3 show the working postures of a medium-sized pile driver, which is an example of a construction machine. The pile driver 11 includes a crawler-type lower traveling body 12 and a base machine (machine body) 15 composed of an upper swing body 14 rotatably provided on the lower traveling body 12 via a slewing bearing 13, a leader 16 erected at the front of the upper swing body 14, and a hoisting cylinder 17 that supports the leader 16 from behind.

[0012] At the front of the upper swing body 14, a leader support 18 that supports the leader 16 so as to be able to rise and fall is provided. In addition, jacks 19 for stability with adjustable tension widths are provided at four locations on the front, rear, left, and right of the upper swing body 14, and a counterweight 20 for balancing the pile driver 11 is mounted at the rear end of the upper swing body 14.

[0013] The leader 16 is divided into a rotatable basic leader 21 pivotally supported by a 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. Further, the upper leader 22 is divided into a plurality of leader members, and a top sheave 24 is mounted on the upper end. Each leader member has flange members provided at the upper and lower ends detachably connected by bolts and nuts. Also, a rotation drive device (not shown) is mounted on the front surface of the leader 16 so as to be able to move up and down.

[0014] The upper slewing body 14 has an airframe frame in which a rectangular box-shaped main frame 25 with a slewing bearing 13 attached to the lower surface and floor frames 26 (the other side is not shown) framed on both sides in the width direction of the main frame 25 are integrally joined. A driver's cab 27 for an operator to board is installed at the front on the right floor frame. Also, an equipment housing house 28 for housing hydraulic equipment is provided at the rear on the right floor frame (Fig. 7). On the other hand, an engine housing house 29 for housing related equipment such as an engine power unit and an exhaust gas purification device attached thereto is provided on the left floor frame 26.

[0015] Each of the houses 28, 29 is formed in a box shape by a frame structure integrated with the floor frame 26 of a rectangular frame (U-shaped cross-section) and a sheet metal structure responsible for the exterior, and includes a gantry frame defining the accommodation space and a plurality of cover members including a door attached to the gantry frame. Each of the houses 28, 29 usually has the position of the outer surface with the door aligned with the outer surface of the floor frame 26 and corresponds to the width (transport width) W of the upper slewing body 14 as shown in Fig. 7 and the like.

[0016] As shown in FIGS. 4 and 5, the lower traveling body 12 includes a center frame 30 having a slewing bearing 13, and a pair of axles (shafts) 31, 31 provided at the front and rear portions of the center frame 30 in the longitudinal direction of the traveling body (the left-right direction in FIG. 4), which together form a track frame. At both ends of each of the axles 31, 31 spaced apart from each other, a pair of side frames 32, 32 are supported so as to be slidable in the width direction of the traveling body (the up-down direction in FIG. 4) along the axle, and a pair of spanner cylinders 33, 33 for expanding and contracting (sliding) the side frame 32 along the axle 31 are provided.

[0017] The tip of the axle 31 functions as a side frame mounting portion 34 and has a welded structure with a rectangular cross-section as shown in FIG. 14. In particular, the pair of steel plates arranged in the vertical direction are, for example, about 50 mm thick. On the outer surface 34a of this side frame mounting portion 34, as a mounting portion for attaching components (sub-axles 47) of a disassembling jig 46 for the side frame described later, a total of four screw holes 34b are provided at two locations each on the wall surfaces of the upper and lower pair of steel plates, and two pin holes 34c are provided on the wall surface of the upper steel plate. Here, the screw holes 34b, 34b in the longitudinal direction of the traveling body are provided at both corners of the outer surface 34a of the side frame mounting portion 34 so as to be spaced apart from each other. On the other hand, the pin holes 34c, 34c are provided adjacent to the screw holes 34b, 34b and spaced apart from each other.

[0018] The side frame 32 is mainly formed in a rectangular tubular shape extending in the longitudinal direction of the vehicle body by upper and lower plates 32a and 32b and inner and outer side plates 32c and 32d, and has a rectangular hollow structure penetrating the inner and outer side plates 32c and 32d in the horizontal direction. It has a pair of axle insertion holes 32e, 32e in the longitudinal direction of the vehicle body through which the axles 31, 31 can be inserted, and a cylinder insertion hole 32f provided in the middle part thereof through which the spanner cylinder 33 can be inserted. With the side frame mounting portion 34 of the axle 31 inserted into the axle insertion hole 32e and the spanner cylinder 33 inserted into the cylinder insertion hole 32f, the piston rod end portion 33a of the spanner cylinder 33 is connected to a bracket 35 provided on the side surface (outer side plate 32d) of the side frame 32 by a cylinder pin 36.

[0019] Also, the side frame 32 is pivotally connected to the track frame via a pair of links 37, 37 in the longitudinal direction of the vehicle body provided on the front surface of the front axle 31 and the rear surface of the rear axle 31, respectively. The link 37 is plate-shaped and extends along the length direction of the axle 31, and has a plurality of pin holes for determining the position in the vehicle body width direction with respect to the track frame. By replacing the link pin 38 with respect to the plurality of pin holes, for example, as shown in the upper side of FIG. 4, when the spanner cylinder 33 is extended and the side frame 32 projects outward in the vehicle body width direction (construction position), or as shown in the lower side of FIG. 4, when the spanner cylinder 33 is contracted and the side frame 32 is housed inward in the vehicle body width direction (temporary support position during assembly and disassembly), it can be changed.

[0020] A sprocket wheel 39 serving as a drive wheel is provided at the rear end portion of the side frame 32, and an idler wheel 41 serving as a floating wheel for adjusting the tension of the crawler 40 is provided at the front end portion of the side frame 32. In addition, a plurality of idler wheels 42 are provided on the upper and lower portions of the side frame 32, and a pair of upper guides 43 are provided in the front and rear at a position corresponding to the axle 31 of the track frame (upper surface of the upper plate 32a).

[0021] As shown in FIG. 5, the crawler 40 is formed by connecting a plurality of crawler shoes (iron shoes with rubber pads) 44 in an endless manner and looping them around a sprocket wheel 39 and an idler wheel 41. The crawler 40 assembled to the side frame 32 is driven when the engagement protrusion 44a provided on the inner surface side of the crawler shoe 44 engages with the engagement recess 39a of the sprocket wheel 39, and the engagement protrusion 44a is guided by the groove portions (not shown) of the idler wheel 41, the tumbler wheel 42, and the upper guide 43 to circulate around the outer periphery of the side frame 32.

[0022] Here, when transporting the pile driver 11, the upper leader 22 is removed, and on the machine side, heavy objects such as a rotary drive device and a counterweight 20 are removed, and the basic leader 21 is placed in a transport posture where it is laid down backward. Here, when disassembling the lower traveling body 12, as shown in FIGS. 6 and 7, after placing pedestals 45 directly below the jacks 19 with the spreading width adjusted (a total of four locations), as shown in FIG. 8, the jacks 19 are extended to lift the crawler 40 off the ground, and in the lower traveling body 12, the side frames 32, 32 on both sides are sequentially removed from the truck frame.

[0023] At this time, the side frame disassembling jig 46 (sub-axle 47) will be used. As a setup operation for setting this, as shown in the lower part of FIG. 4 and FIG. 9, the span cylinder 33 is contracted to change the position of the side frame 32 to a temporary support position. In this state, as can be seen by comparing FIGS. 7 and 9, the crawlers 40, 40 are housed within the width W of the upper swing body 14, and as can be seen by comparing the upper and lower parts of FIG. 4, the outer surface 34a of the side frame mounting portion 34 protrudes from the axle insertion hole 32e of the side frame 32. In this way, after securing a space for attaching the jig on one side of the side frame 32, although details will be described later, as shown in FIGS. 14 and 15, the side frame disassembling jig 46 (sub-axles 47, 47) is set with respect to the side frame mounting portions 34, 34. Thereby, as shown in FIGS. 16 and 17, the setup for lifting the side frame 32 using the side frame lifting jig 48 separately attached to the crawler 40 is completed.

[0024] The side frame disassembling jig 46 is a jig used to lift the side frame 32 from a state where it has moved outward in the traveling body width direction along the axles 31, 31 of the track frame. As a part of the axle 31, that is, by extending the axle 31, it is used to cantilever support the side frame 32. Its specific configuration includes four sub-axles 47 that are each detachably attached to each of the side frame mounting portions 34 (a total of four locations) of the axles 31, 31 of the track frame.

[0025] All four of the sub-axles 47 have the same shape. As shown in FIGS. 10 to 14, it generally consists of a mounting plate 49 having a mounting plate surface 49a that abuts against the outer surface 34a of the side frame mounting portion 34 and is attached, a support plate 50 having a support plate surface 50a that is connected to the upper surface 34d of the side frame mounting portion 34 and extends outward in the traveling body width direction, and a pair of reinforcing plates 51, 51 in the longitudinal direction of the traveling body that are straddled between the mounting plate 49 and the support plate 50.

[0026] The mounting plate 49 is rectangular and corresponds to the outer shape (outline) of the outer surface 34a of the side frame mounting portion 34. An opening 49b is provided at the center, and four bolt holes 49c are provided for fastening with mounting bolts 52 using four screw holes 34b on the outer surface 34a. Further, a pair of guide pins 53, 53 to be inserted into two pin holes 34c, 34c on the outer surface 34a are provided on the mounting plate surface 49a. When the guide pin 53 is inserted into the pin hole 34c, that is, when the pin hole 34c and the guide pin 53 are concentrically positioned, as shown in FIG. 15, the upper surface 34d of the side frame mounting portion 34 and the support plate surface 50a of the support plate 50 are configured to be at the same height. Here, the guide pin 53 and the pin hole 34c have a pin diameter of, for example, 22 mm and a hole diameter of, for example, 25 mm, with a diameter difference provided. When the two are concentrically positioned, a gap (1.5 mm) is provided in the radial direction.

[0027] The support plate 50 has a length necessary for placing the side frame 32 on the support plate surface 50a, that is, a length that allows the side frame 32 to be placed outside the width W of the upper swing body 14 and enables the side frame 32 to be lifted integrally with the crawler 40 from that state. Two openings 50b, 50c are provided side by side in the longitudinal direction. A suspension portion 54 formed by a round bar spanning between a pair of reinforcing plates 51, 51 is provided in one of the two openings 50b, 50c (the opposite plate surface of the support plate surface 50a). The arrangement of this round bar is such that the center of gravity balance of the sub-axle 47 is achieved, and a suspension tool (such as a rope) is configured to be hung on the round bar through the opening 50b. Further, a pair of tapered portions 50d, 50d that gradually narrow are provided at the tip end (outer end portion) of the support plate 50, and chamfered portions 50e that eliminate right-angled corners are provided on three sides including the plate end on the base end side and the front and rear plate ends.

[0028] A pair of reinforcing plates 51, 51 are disposed between a mounting plate 49 and a support plate 50 which are perpendicular to each other, and are fixed across them. In a state where the mounting plate 49 is attached to the outer surface 34a of the side frame mounting portion 34 (FIG. 15), the plate surfaces are arranged facing the horizontal direction (front-rear direction) respectively (that is, the reinforcing plates 51, 51 are arranged so as to extend in the vertical direction), and substantially 45-degree tapered portions 51a, 51a are provided at the tips. Further, on the outer plate surfaces of the pair of reinforcing plates 51, 51, at positions corresponding to the round bars of the hanging portions 54, handle portions 55, 55 formed by bending round bars having the same diameter as those of the hanging portions 54 are provided. Furthermore, in the mounted state, as shown in FIG. 16, there are a cross-sectional area gradually decreasing region 51b in which the cross-sectional area gradually decreases as going outward from the mounting plate 49, and a cross-sectional area constant region 51c in which the cross-sectional area does not increase or decrease in a region continuous with the outside of the cross-sectional area gradually decreasing region 51b, and tapered portions 51a, 51a are provided at the outer end portions thereof. The boundary portion 51d between the regions 51b, 51c is provided with an R shape at the lower end, and the increase and decrease of the cross-sectional area change gently, and is provided at a position overlapping vertically with the inner end of the side frame 32 at the lifting start position (maximum overhanging position, FIG. 16) obtained by fully extending the spanner cylinder 33, in other words, the position of the inner end P of the axle insertion hole 32e.

[0029] As shown in FIG. 11, the relationship between the regions 51b, 51c and the boundary portion 51d is defined by the length of the cross-sectional area gradually decreasing region 51b being L1, the cross-sectional area constant region 51c being L2, and the boundary portion 51d being L3. The linear plate end forming the lower end of the cross-sectional area gradually decreasing region 51b has an upward inclination of about 30 degrees with respect to the horizontal and extends toward the boundary portion 51d located in the middle of the length direction of the reinforcing plate 51. The vertical dimension of the cross-sectional area constant region 51c is formed to be about 1 / 3 or less of the maximum value of the vertical dimension of the cross-sectional area gradually decreasing region 51b (corresponding to the vertical dimension of the mounting plate 49), but has a dimension with sufficient strength to support the mass of the side frame 32.

[0030] When attaching the sub-axle 47 formed in this way to the side frame mounting portion 34, as shown in FIG. 14, the sub-axle 47 is lifted using the suspension portion 54, and by grasping the handle portions 55, 55, the mounting plate surface 49a of the mounting plate 49 is pressed against the outer surface 34a of the side frame mounting portion 34. At this time, the guide pin 53 is inserted into the pin hole 34c, and the mounting position is generally determined. In this state, the mounting bolt 52 is temporarily tightened to apply axial force. Then, it is lightly struck with a tool such as a plastic hammer to correct (fine-tune) the axial displacement of the guide pin 53 with respect to the pin hole 34c, and the upper surface 34d of the side frame mounting portion 34 and the support plate surface 50a of the support plate 50 are aligned to the same height (flush). After that, by tightening the mounting bolt 52 to the specified torque, as shown in FIG. 15, the sub-axle 47 is securely attached to the side frame mounting portion 34.

[0031] After attaching all four sub-axles 47, the link pin 38 on the side frame 32 side is removed to release the pin connection of the link 37 with the track frame, and as shown in FIG. 16, the spanner cylinder 33 is extended to the maximum to move the side frame 32 to the lifting start position (maximum overhang position). At this time, the portion of the upper plate 32a in the axle insertion hole 32e smoothly moves (slides) outward toward the support plate surface 50a of the support plate 50 from the state of being placed on the upper surface 34d of the side frame mounting portion 34, and as a result, the side frame 32 is placed on the tip of the sub-axle 47. Note that at the lifting start position (maximum overhang position), the reinforcing plate 51 has a longitudinal length that allows the tip of the sub-axle 47 to support the upper plate 32a from below at the position of the upper guide 43 of the side frame 32.

[0032] Here, four hanger members 56 are attached as components of the side frame hanging jig 48 to a predetermined position of the crawler 40. As shown in FIG. 17, one end annular portion of the prepared suspension rope 57 is attached to the suspension hook 58 of the crane, and the other end annular portion is attached to each hanger member 56 with a shackle 59. Thereby, the side frame hanging jig 48 is set with respect to the crawler 40, and it becomes a standby state where it can be lifted by four suspension ropes 57. Then, the cylinder pin 36 of the spanner cylinder 33 is removed, and the pin connection between the spanner cylinder 33 and the side frame 32 is released (the most contracted state of the spanner cylinder 33). Then, by the lifting operation of the crane, the side frame 32 is laterally moved while avoiding interference with the sub-axle 47.

[0033] Here, as can be imagined from FIG. 16, when the suspension hook 58 is lifted to apply tension to the suspension rope 57, the position of the axle insertion hole 32e moves in the vertical direction with respect to the sub-axle 47. At this time, due to the shape change of the constant cross-sectional area region 51c that is continuous outward from the gradually decreasing cross-sectional area region 51b of the reinforcing plate 51, a vertical clearance (movable range) is secured between the bottom of the hollow structure forming the axle insertion hole 32e and the sub-axle 47 (reinforcing plate 51), and the movement of the side frame 32 at the start of lifting, which is carried out with particular care, is performed safely.

[0034] Thus, the side frame 32 completely separated from the truck frame is carried onto the loading platform of the transport truck while maintaining a stable horizontal state as shown in FIG. 18. The side frame hanging jig 48 is set for the side frame 32 on the opposite side in the same procedure, and it is removed from the truck frame by four-point suspension of the suspension ropes 57. In this case, the four hanger members 56 will be transported in a state of being attached to the side frame 32 that was removed later.

[0035] On the other hand, the four sub-axles 47 will be transported while remaining attached to the truck frame. In this case, a turning operation is performed to rotate the truck frame 90 degrees with respect to the upper slewing body 14, and as shown in FIG. 19, the sub-axles 47 are housed within the width W of the upper slewing body 14. Then, by fully extending the jack 19, as shown in FIG. 20, a wide space is formed under the machine body, and it becomes possible to receive the loading platform 60 of the transport trailer.

[0036] After loading onto the loading platform 60, the jack 19 is put into the stored state, and as shown in FIG. 21, it is housed and held within the loading platform width (transport width) where safe transportation is possible. At this time, depending on the amount of the machine body's height increase, for example, measures such as removing the rear-side jack 19 are taken to prevent contact with the loading platform 60. In this way, the pile driver 11 with the machine body and the side frame 32 separated transports the side frame 32 in a component state separately from the machine body, and at the site, these are assembled and used in the reverse procedure of the above. In this case, the sub-axles 47 in the state of being attached to the truck frame can be immediately put into a usable state just by performing a turning operation to rotate the truck frame 90 degrees with respect to the upper slewing body 14.

[0037] Thus, according to the disassembling jig 46 for the side frame of the construction machine of the present invention, in the sub-axle 47 having a plate material as a main component, since the support plate 50 has a support plate surface 50a that is connected to the upper surface 34d of the tip portion 34 of the axle 31 and extends outward in the traveling body width direction, it is possible to impart light weight that enables easy attachment and detachment to the axle 31, and a series of operations for disassembling and transporting the traveling body 12 can be efficiently advanced. Moreover, due to the integral structure of the mounting plate 49, the support plate 50, and the reinforcing plate 51, while satisfying the necessary support strength for the side frame 32, the total number of parts of the jig set can be reduced, resulting in an inexpensive and excellent manufacturability.

[0038] Also, the mounting plate 49 is configured to be attached with bolts 52. Guide pins 53, 53 are provided on the mounting plate surface 49a. With the guide pins 53, 53 inserted into the pin holes 34c, 34c at the tip 34 of the axle 31, the upper surface 34d of the tip 34 and the support plate surface 50a of the support plate 50 are at the same height. Thus, the alignment of the bolt holes 49c of the mounting plate 49 can be easily and stably performed without difficulty. Moreover, since there is a diameter difference between the guide pin 53 and the pin hole 34c, in combination with the configuration of fastening the mounting plate 49 with bolts, the positioning (fine adjustment) operation when attaching the sub-axle 47 can proceed smoothly.

[0039] Furthermore, in the mounted state of the mounting plate 49, the reinforcing plate 51 is arranged with its plate surface facing horizontally, and has a cross-sectional area gradually decreasing region 51b where the cross-sectional area gradually decreases as it goes outward from the mounting plate 49, and a cross-sectional area constant region 51c where the cross-sectional area does not increase or decrease in the region continuous with the outside of the cross-sectional area gradually decreasing region 51b. The boundary portion 51d of each region is provided at a position overlapping vertically with the inner end P of the side frame 32 at the lifting start position. Therefore, both the support strength for the side frame 32 and the vertical clearance (movable range) can be ensured.

[0040] Note that the present invention is not limited to the above-described embodiment. The sub-axle may be simply formed by combining plate materials. The dimensions of each part such as the mounting plate, support plate, reinforcing plate, and guide pin, and the applicable plate thickness can be appropriately changed according to the size and shape of the side frame, and it is sufficient to be provided with at least two as components of the disassembly jig. Also, for the mounting method, a mechanical fastening method other than the bolt fastening in the embodiment can be adopted. Furthermore, by providing a hanging portion, a handle portion, an opening portion, a chamfered portion, a tapered shape portion, etc., improvement in usability and quality can be achieved, but these are also optional. In addition, although a pile driver is exemplified as the construction machine, it is not limited thereto, and it can be applied to various crawler-mounted construction machines such as a crane and an earth drill.

Explanation of Reference Numerals

[0041] 11…Striking machine, 12…Lower traveling body, 13…Slewing bearing, 14…Upper slewing body, 15…Base machine, 16…Leader, 17…Lifting 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…Driver's cab, 28…Equipment housing, 29…Engine housing, 30…Center frame, 31…Axle, 32…Side frame, 32a…Upper plate, 32b…Lower plate, 32c…Inner plate, 32d…Outer plate, 32e…Axle insertion hole, 32f…Cylinder insertion hole, 33…Spanner cylinder, 33a…Piston rod terminal part, 34…Side frame mounting part, 34a…Outer surface, 34b…Threaded hole, 34c…Pin hole, 34d…Upper surface, 35…Bracket, 36…Cylinder pin, 37…Link, 38…Link pin, 39…Sprocket wheel, 39a…Engaging recess, 40…Crawler, 41…Idler wheel, 42…Turning wheel, 43…Upper guide, 44…Crawler shoe, 44a…Engaging projection, 45…Pedestal, 46…Disassembly jig for side frame, 47…Sub-axle, 48…Lifting jig for side frame, 49…Mounting plate, 49a…Mounting plate surface, 49b…Opening, 49c…Bolt hole, 50…Support plate, 50a…Support plate surface, 50b, 50c…Opening, 50d…Tapered shape part, 50e…Chamfered part, 51…Reinforcing plate, 51a…Tapered shape part, 51b…Region with gradually decreasing cross-sectional area, 51c…Region with constant cross-sectional area, 51d…Boundary part, 52…Mounting bolt, 53…Guide pin, 54…Hanging part, 55…Handle part, 56…Hanger member, 57…Hanging rope, 58…Hanging hook, 59…Shackle, 60…Loading platform

Claims

1. In a disassembling jig for a side frame of a construction machine used to support the side frame as part of an axle to lift the side frame of a crawler traveling body from a state where it has been moved outward in the width direction of the traveling body along the axle of a truck frame, the disassembling jig for the side frame is provided with two sub-axles that are detachably attached to two axles spaced apart in the longitudinal direction of the traveling body of the truck frame, respectively, the sub-axle is composed of a mounting plate having a mounting plate surface that is attached in contact with the outer surface of the tip of the axle, a support plate having a support plate surface that is connected to the upper surface of the tip of the axle and extends outward in the width direction of the traveling body, and a reinforcing plate that straddles between the mounting plate and the support plate. The disassembling jig for the side frame is characterized by this.

2. The mounting plate is attached to the outer surface of the tip of the axle with a plurality of bolts, and a pair of guide pins that are inserted into a pair of pin holes provided in the longitudinal direction of the traveling body at the tip of the axle are provided on the mounting plate surface, The disassembling jig for the side frame according to Claim 1, characterized in that the upper surface of the tip of the axle and the support plate surface of the support plate are at the same height in a state where the guide pins are inserted into the pin holes.

3. The reinforcing plate is arranged with its plate surface facing horizontally in a state where the mounting plate is attached to the outer surface of the tip of the axle, and has a cross-sectional area gradually decreasing region where the cross-sectional area gradually decreases as it goes outward from the mounting plate, and a cross-sectional area constant region where the cross-sectional area does not increase or decrease in a region continuous with the outside of the cross-sectional area gradually decreasing region. The boundary of each region is provided at a position that vertically overlaps with the inner end of the side frame at the starting position of lifting. The disassembling jig for the side frame according to Claim 1 or 2 is characterized by this.

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