JP2009040110A - Jack-up device of crawler type construction machine - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To post-install a jack cylinder without performing welding work. <P>SOLUTION: This jack-up device forms a jack unit 20 by arranging an axle installation part 23 at the other end by installing the jack cylinder 22 at one end of a jack beam 21. The axle installation part 23 has a projection 24 formed in the horizontal direction from the lower edge of the other end surface in the longitudinal direction of the jack beam 21, a bending part 25 arranged at its end, and an L-shaped bracket 27 detachably connected between a bracket 25a arranged at the upper end of the bending part 25 and a bracket 26 arranged at the upper edge of the other end surface in the longitudinal direction of the jack beam 21. The axle installation part 23 of the individual jack unit 20 is detachably installed at the outer periphery of each axle 9 arranged for installing a crawler 4 in right/left positions of both front/rear ends of a lower traveling body 2 of a crawler crane 1, and the jack cylinder 22 is installed on each axle 9 via the jack beam 21. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a jack-up device for a crawler-type construction machine that is used for jacking up the crawler-type construction machine in order to detach the left and right crawlers from a lower traveling body in the crawler-type construction machine.

  Crawler cranes, one of the crawler type construction machines, have advantages such as excellent stability, good running performance on rough terrain and soft ground, and easy movement within the work site.・ Widely used for construction such as construction and port construction.

  5 (a) and 5 (b) show an outline of an example of the crawler crane 1. The cab 6 and the jib 7 are shown on the upper side of the lower traveling body 2 provided with the crawlers 4 on both the left and right sides of the car body 3. The upper turning body 5 to which a driving diesel engine, a hydraulic pump, a hydraulic oil tank, a main winch, an auxiliary winch and the like are attached is provided so as to be turnable via a turning bearing 8.

  By the way, when the crawler crane 1 is carried into or out of the work site, it is usually necessary to load the crawler crane 1 on a trailer and transport it.

  Therefore, a relatively small one of the crawler cranes 1 is generally configured to have a function capable of expanding and reducing the distance (tread) between the left and right crawlers 4 of the lower traveling body 2. The vehicle was loaded on a trailer or the like in a state where the distance was reduced to reduce the body size.

  Specifically, as shown in FIG. 5B, four axles 9 having a quadrangular cross section and extending in the left-right direction are provided on the left and right sides of the front end portion and the rear end portion of the car body 3. On the other hand, in the middle part in the front-rear direction of the crawler frame 10 of the left and right crawlers 4, axles penetrating in the left-right direction at positions corresponding to the respective axles 9 arranged on the left and right sides of the car body 3. A box 11 is provided, and the corresponding axle 9 is slidably inserted into each axle box 11.

  Further, the left and right sides of the car body 3 are attached with the proximal end portions of the crawler telescopic cylinders 12 arranged on the left and right outwards, and the front ends of the crawler telescopic cylinders 12 are connected to the corresponding crawlers 4 on the left and right sides. Are connected to each other. Thus, by expanding and contracting the left and right crawler telescopic cylinders 12, the left and right crawlers 4 can be slid in the left and right directions along the corresponding axles 9 so that the interval between the left and right crawlers 4 can be expanded and contracted. is there.

  Furthermore, link mounting brackets 13 are provided at the left and right end positions of the front end surface and the rear end surface of the car body 3. On the other hand, a crawler having a required length dimension at a position near the front side of the front axle box 11 and a position near the rear side of the rear axle box 11 at the side surface of the car body 3 of the crawler frame 10 of the left and right crawlers 4. A base end portion of the fixing link 14 is swingably attached in the horizontal direction, and one of the pin holes 15 provided at a required interval in the longitudinal direction of the crawler fixing link 14 is connected to the car body. The distance between the left and right crawlers 4 can be fixed by connecting to the link mounting bracket 13 on the 3 side with a pin 16 (see Patent Document 1 and Patent Document 2).

  Accordingly, the pin hole 15 near the base end of the crawler fixing link 14 is connected to the link mounting bracket 13 on the car body 3 side by the pin 16 in a state where the crawler telescopic cylinder 12 is most contracted. Thus, the distance between the left and right crawlers 4 is fixed in the most reduced state and is loaded on a trailer or the like.

  In addition, when the crawler crane 1 is a large crawler crane 1 that exceeds the weight limit related to road transport, the lower traveling body is not provided in place of the above-described mechanism for expanding and reducing the distance between the left and right crawlers 4. The left and right crawlers 4 can be removed from the car body 3, and the crawler crane 1 with the left and right crawlers 4 removed is loaded on a trailer or the like.

  Therefore, as shown in FIG. 6, the large crawler crane 1 as described above usually has brackets 17 provided at the left and right positions of the front and rear ends of the car body 3 and base ends connected to the brackets 17. A jack-up device comprising an individual jack beam 19 that extends in the front-rear direction and a jack (jack cylinder) 18 that is individually attached downward at the tip of each jack beam 19 is provided. Thus, by extending each jack 18, the left and right crawlers 4 can be jacked up integrally with the car body 3 of the lower traveling body 2 so that the left and right crawlers 4 can be separated from the ground surface. It is. Accordingly, in the state where the left and right crawlers 4 are separated from the ground surface as described above, the crawlers 4 are removed from the corresponding axles 9 to remove the left and right crawlers 4 from the lower traveling body 2. (For example, refer to Patent Document 3).

  In FIG. 6, the same components as those shown in FIGS. 5A and 5B are denoted by the same reference numerals.

JP 2005-263016 A Japanese Patent Laid-Open No. 10-45385 JP 2003-127915 A

  However, in recent years, due to stricter weight restrictions on road transport, the conventional transporting is carried on a trailer with left and right crawlers 4 mounted as shown in FIGS. Even in a comparatively small crawler crane 1 that has been possible, the weight limit may be exceeded if the left and right crawlers 4 are mounted on the lower traveling body 2. For this reason, the crawler crane 1 that has been conventionally transportable with the left and right crawlers 4 attached is also required to be transported with the left and right crawlers 4 removed from the lower traveling body 2. Yes.

  However, as described above, a relatively small crawler crane 1 that has been conventionally transportable with the left and right crawlers 4 mounted thereon is equipped with a device for jacking up the crawler crane 1. That is not the case. For this reason, it has been desired to retrofit a crawler crane 1 of a type not equipped with a jackup device to allow the left and right crawlers 4 to be separated from the ground surface. .

  As one method for retrofitting the jack-up device to the crawler crane 1, as in the conventional large crawler crane 1 shown in FIG. It is conceivable that the brackets 17 are installed at the positions, and the jack cylinders 18 are respectively attached to the brackets 17 via the jack beams 19.

  However, in this case, it is necessary to firmly attach each bracket 17 to the car body 3 of the lower traveling body 2 of the crawler crane 1 by welding. Therefore, since it is necessary to modify the lower traveling body 2 by applying heat by welding work, it is difficult to modify the installed crawler crane 1.

  Furthermore, by attaching the brackets 17 to the car body 3, the left and right crawlers 4 are slid in the left and right directions along the axle 9, and the function of expanding and reducing the distance between the left and right crawlers 4 may be hindered. Is also a concern.

  Accordingly, the present invention is intended to provide a jack-up device for a crawler-type construction machine that can easily attach a jack cylinder to a construction machine with a crawler without requiring remodeling work that requires welding.

  In order to solve the above-mentioned problems, the present invention, corresponding to claim 1, attaches a downward jack cylinder to one end portion of a jack beam extending in a substantially horizontal direction, and an axle attachment portion to the other end portion of the jack beam. A jack unit is provided, and the axle of the individual jack unit is attached to the axle provided to displace the crawler to the left and right ends of the front and rear ends of the lower traveling body of the crawler type construction machine. It is set as the structure which attached the attachment part so that attachment or detachment was possible.

  Further, the axle mounting portion in the above configuration is configured to be detachably attached to the outer periphery of the axle of the lower traveling body of the crawler type construction machine.

  Further, the axle mounting portion in the above configuration is projected from the lower end edge of the other end surface in the longitudinal direction of the jack beam in a horizontal direction with a dimension slightly larger than the width dimension of the axle, and a projecting end portion of the projecting portion. L-shaped detachably connected between a bent portion bent upward in a required dimension, a bracket provided at the bent portion, and a bracket provided at the upper edge of the other end surface in the longitudinal direction of the jack beam. It is set as the structure provided with a bracket.

  Further, in the above configuration, a box-type bracket whose width dimension can be adjusted by a shim interposed between the stay and the stay is provided on the upper end of the other end surface in the longitudinal direction of the jack beam.

  In each of the above configurations, a shim is attached to the lower surface side of the L-shaped bracket.

  In each of the above-described configurations, a link mounting bracket is provided on the side surface of the jack beam, and the link on the side surface of the jack beam with respect to the link mounting bracket provided on the left and right ends of the front and rear ends of the lower traveling body of the crawler type construction machine. A jack unit positioning link for connecting the mounting bracket is provided.

  Further, in each of the above-described configurations, the length from the axle mounting portion to the jack cylinder in the jack unit is provided in the lower traveling body of the crawler type construction machine from the width dimension of the trailer on which the crawler type construction machine is loaded. It is set as the structure set so that it may become longer than the dimension of 1/2 of the value which pulled the dimension between front and rear axles.

According to the jack-up device of the crawler type construction machine of the present invention, the following excellent effects are exhibited.
(1) A jack unit is formed by attaching a jack cylinder facing downward to one end of a jack beam extending in a substantially horizontal direction and providing an axle mounting portion at the other end of the jack beam. A configuration in which the axle mounting portion of the individual jack unit is detachably attached to the axle provided to attach the crawler to the left and right positions of the front and rear end portions of the traveling body so as to be displaceable in the left and right directions, specifically, A structure in which the axle attachment portion is detachably attached to the outer periphery of the axle of the lower traveling body of the crawler type construction machine. More specifically, the axle attachment portion is wider than the lower end edge of the other longitudinal end surface of the jack beam. A protruding part that protrudes in the horizontal direction with a dimension slightly larger than the dimension, and is bent upward from the protruding end of the protruding part to the required dimension. A bent portion, a bracket provided at the bent portion, and an L-shaped bracket detachably connected between the bracket and a bracket provided at the upper end edge of the other end surface in the longitudinal direction of the jack beam. Since it is configured, it is possible to attach a jack cylinder to each axle via a jack beam using an axle provided to attach the crawler to the lower traveling body of the crawler type construction machine. Therefore, a jack cylinder used for jacking up the crawler type construction machine can be retrofitted and installed on the crawler type construction machine side without any modification requiring welding.
(2) A structure in which a box-shaped bracket whose width is adjustable by a shim interposed between the stay and the stay in the longitudinal direction on the other end surface in the longitudinal direction of the jack beam is detachable, or the lower surface of the L-shaped bracket By adjusting the thickness of each of the shims as described above, the width and height of each axle of the lower traveling body of the crawler type construction machine may slightly vary. Even if it is, the axle attachment part of a jack unit can be reliably attached to the outer periphery of each axle.
(3) A link mounting bracket is provided on the side surface of the jack beam, and the link mounting bracket on the side surface of the jack beam is provided with respect to the link mounting brackets provided at the left and right end portions of the lower traveling body of the crawler type construction machine. By providing the jack unit positioning link for connection, the jack unit attached to the axle can be positioned without any modification on the crawler type construction machine side.
(4) The length dimension from the axle mounting portion to the jack cylinder in the jack unit is determined from the width dimension of the trailer on which the crawler type construction machine is loaded, between the front and rear axles provided on the lower traveling body of the crawler type construction machine. The jack cylinder of each jack unit attached to each axle of the lower traveling body of the crawler type construction machine is configured to be longer than a half of the value obtained by subtracting the dimension between them. This can be used for jack-up work for loading a construction machine on a trailer.

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  1 (a) (b) to FIG. 4 (b) (b) (c) are applied to a crawler crane 1 as a crawler type construction machine as an embodiment of a jack-up device for a crawler type construction machine according to the present invention. In the longitudinal direction, a downward jack cylinder 22 is attached to one longitudinal end portion of the jack beam 21 extending in a substantially horizontal direction and having a required dimension, and the proximal end portion of the jack beam 21 is attached. The jack beam 21 is arranged in a direction perpendicular to the axle 9 provided on the car body 3 of the lower traveling body 2 in the crawler crane 1 similar to that shown in FIGS. The jack unit 20 is configured by providing an axle mounting portion 23 for detachably mounting. Further, the lower traveling body 2 of the crawler crane 1 protrudes outward in the longitudinal direction of the four axles 9 provided at the left and right ends of the front and rear ends of the car body 3 respectively. It is assumed that the axle mounting portions 23 of the jack units 20 arranged individually are respectively mounted.

  More specifically, the lower end portion of the cylinder tube 22a of the jack cylinder 22 disposed downward is attached to one end portion of the jack beam 19 in the longitudinal direction.

  The axle mounting portion 23 provided at the other longitudinal end of the jack beam 21 can be detachably mounted on the outer periphery of the axle 9 of the lower traveling body 2 of the crawler crane 1 as described below. is there.

  That is, the jack beam 21 is set such that at least the height dimension of the other end portion in the longitudinal direction is larger than the height dimension of the axle 9 by a required amount, and the lower end edge portion of the other end surface in the longitudinal direction of the jack beam 21. In addition, a protruding portion 24 that protrudes in the horizontal direction with a dimension slightly larger than the width dimension in the direction perpendicular to the longitudinal direction of the axle 9 (hereinafter simply referred to as the width dimension of the axle 9) is provided. Further, a bent portion 25 that bends upward in the required dimension is provided at the protruding end portion of the protruding portion 24, and a bracket 25a having a horizontal pin hole is formed at the upper end portion of the bent portion 25. . Further, a bracket 26 having a horizontal pin hole is provided at the upper edge of the other end surface in the longitudinal direction of the jack beam 21.

  A horizontal portion 27a having substantially the same dimensions as the projecting portion 24 in the horizontal direction and having a horizontal pin hole at one end thereof; and a required dimension extending below the other end of the horizontal portion 27a; and An L-shaped bracket 27 including a vertical portion 27b having a horizontal pin hole at the lower end portion is provided, and the L-shaped bracket 27 is connected to the bracket 26 at the upper end edge of the other end surface in the longitudinal direction of the jack beam 21 and the above-mentioned Between the upper end bracket 25a of the bent portion 25, one end portion of the horizontal portion 27a is placed on the bracket 26, and the lower end portion of the vertical portion 27b of the L-shaped bracket 27 is placed on the bent portion 25. The upper end bracket 25a is connected to the bracket 25a via removable pins 28 and 29, respectively. Thereby, the longitudinal direction of the jack beam 21 is placed on the other end surface in the longitudinal direction of the upper portion of the jack beam 21, the protruding portion 24 and the bent portion 25, and the horizontal portion 27 a and the vertical portion 27 b of the L-shaped bracket 27. And has a height dimension that is substantially the same as or slightly larger than the height dimension of the axle 9 and is slightly larger than the width dimension of the axle 9 along the longitudinal direction of the jack beam 21. The axle insertion hole 30 can be formed. Therefore, after the axle 9 of the lower traveling body 2 of the crawler crane 1 is sandwiched from both sides in the vertical direction by the jack beam 21 and the L-shaped bracket 27 in a separated state, both ends of the L-shaped bracket 27 are connected to the jack beam. The axle 9 can be accommodated inside the axle insertion hole 30 by being connected to the brackets 25a and 26 provided on the 21 side via the pins 28 and 29.

  By the way, each axle 9 provided in the car body 3 of the lower traveling body 2 of the crawler crane 1 has a crawler crane even if the design height dimension and width dimension are the same due to an error or the like that occurs during manufacture. In the actual machine 1, there may be some variation in the height and width dimensions of the axle 9.

  In view of this, the shim 31 can be detachably attached to the lower surface side of the horizontal portion 27a of the L-shaped bracket 27. As a result, the height of the axle insertion hole 30 is adjusted by appropriately adjusting the thickness of the shim 31 disposed on the lower surface side of the horizontal portion 27a, so that the actual machine of the crawler crane 1 to which the jack unit 20 is attached. The height of the axle 9 can be adjusted so as to correspond to the height.

  Further, an attachment member 32 is provided at an upper position of the other end surface in the longitudinal direction of the jack beam 21, and the box-type bracket 32 is detachably attached to the attachment member 33. A bolt that fastens the stay 34 from the inside of the box bracket 32 on one side facing the inside of the axle insertion hole 30 when the box bracket 32 is attached to the other longitudinal end face of the jack beam 21. It is configured to be detachably attached by 35. As a result, when the stay 34 is attached to one side surface of the box-type bracket 32, a shim 36 having an appropriately selected thickness and number of sheets is interposed between one side surface of the box-type bracket 32 and the stay 34. Thus, inside the axle insertion hole 30, the dimension between the stay 34 attached to the box-shaped bracket 32 and the vertical portion 27b of the L-shaped bracket 27 and the bent portion 25 of the jack beam 21, The crawler crane 1 can be adjusted to have a size corresponding to the width of the axle 9 of the actual machine. Therefore, in a state where one side surface of the axle 9 accommodated and disposed inside the axle insertion hole 30 is brought into contact with the bent portion 25 and the inner surface of the vertical portion 27b of the L-shaped bracket 27, As described above, the thickness and number of shims 36 interposed between the stay 34 and the upper portion of the other side surface of the axle 9 and the upper portion of the other side surface in the longitudinal direction of the jack beam 21 are appropriately selected. By inserting the box-shaped bracket 32 having the width dimension adjusted and attaching it to the attachment member 33, the gap between the upper position of the other side surface in the longitudinal direction of the jack beam 21 and the other side surface of the axle 9 can be filled. I can do it. Therefore, when an upward force is applied to the tip end portion of the jack beam 21 by the extension operation of the jack cylinder 22, the jack beam 21 is relatively moved with respect to the axle 9 disposed in the axle insertion hole 30. By preventing the rotation, the upward force applied from the jack cylinder 22 to the tip of the jack beam 21 can be transmitted to the corresponding axle 9 as the upward force.

  Link mounting brackets 37 are provided on both side surfaces of the longitudinal intermediate portion of the jack beam 21. Further, the link mounting bracket 37 and links provided at the left and right end positions of the front and rear end faces of the car body 3 of the lower traveling body 2 of the crawler crane 1 similar to those shown in FIGS. The mounting bracket 13 is provided with a jack unit positioning link 38 having a required length dimension so that both ends can be connected to each other. Thus, when the axle attachment portion 23 having the axle insertion hole 30 of the jack unit 20 is attached to the outer periphery of the axle 9 of the crawler crane 1 as described above, the link attachment bracket 37 on one side of the jack beam 21 is attached. And a link mounting bracket 13 provided on the car body 3 side of the lower traveling body 2 of the crawler crane 1 are connected via the jack unit positioning link 38 so that a predetermined length in the longitudinal direction of the axle 9 is obtained. The jack unit 20 can be attached to the position.

  Furthermore, the jack unit 20 has a trailer 39 on which the crawler crane 1 is loaded, as will be described later with reference to FIGS. 4 (a), (b), and (c). The width dimension is set to be longer than half of the value obtained by subtracting the dimension between the front and rear axles 9 provided on the lower traveling body 2 of the crawler crane 1. Thus, the jack cylinder 22 of the jack unit 20 attached so as to protrude forward on the front axle 9 of the lower traveling body 2 of the crawler crane 1 and the rear axle 9 of the lower traveling body 2 protrude rearward. A space larger than the width of the trailer 39 can be secured between the jack cylinder 22 of the jack unit 20 to be attached.

  Although not shown, pressure oil is supplied to and discharged from the jack cylinders 22 of the jack units 20 in accordance with an operation by an operation panel (not shown) provided at a required position of the lower traveling body 2 of the crawler crane 1. It is assumed that a pressure oil supply / discharge line for carrying out is detachably connected. Reference numeral 40 denotes a pedestal disposed immediately below the operating rod 22a for receiving the operating rod 22a of the jack cylinder 22 in each jack unit 20. Reference numeral 41 denotes an approximate center of gravity of the jack unit 20 with the L-shaped bracket 27 removed. It is a hanging metal fitting provided on the upper side of the jack beam 21 so as to be directly above. Reference numeral 42 denotes a handle for an operator (not shown) to operate the posture of the jack unit 20 in a state where the jack unit 20 is lifted via the suspension fitting 41 by a crane or the like (not shown).

  When using the jack-up device having the above-described configuration, first, as shown in FIG. 2 (a), L in a state where it is removed from the jack beam 21 above the axle 9 of the lower traveling body 2 of the crawler crane 1. The character bracket 27 is placed. At this time, by adjusting the thickness of the shim 31 attached to the lower surface of the horizontal portion 27a of the L-shaped bracket 27, the horizontal portion of the L-shaped bracket 20 is arranged horizontally.

  Further, after removing the crawler fixing link 14 (see FIG. 5B) from the link mounting bracket 13 provided on the car body 3 of the lower traveling body 2 of the crawler crane 1, the jack unit positioning link 38 is removed. Attach one end.

  Next, the jack beam 21 of the jack unit 20 in a state where the L-shaped bracket 27 is removed is lifted by the hanging metal fitting 41 portion by a crane or the like (not shown), and then the jack cylinder 22 side is lifted. After the bent portions 25 are passed under the corresponding axles 9, the jack beams 21 are returned to the horizontal posture, whereby the protruding portions 24 of the jack beams 21 are arranged along the lower surface of the axle 9.

  Next, as shown in FIG. 2B, one end of the link mounting bracket 37 on one side of the jack beam 21 is connected to the link mounting bracket 13 on the car body 3 side of the lower traveling body 2 of the crawler crane 1. The other end of the attached jack unit positioning link 38 is connected.

  Further, as shown in FIG. 2C, the horizontal portion of the L-shaped bracket 27 placed on the upper side of the axle 9 on the bracket 26 on the upper side of the jack beam 21 and the bracket 25a of the bent portion 25. One end of 27a and the lower end of vertical portion 27b are connected via pins 28 and 29, respectively.

  Thereafter, a shim 35 having an appropriately selected thickness and number of sheets is interposed between the mounting member 33 provided at the upper position of the other end surface in the longitudinal direction of the jack beam 21 and the stay 34 as shown in FIG. A box-shaped bracket 32 is attached, and the axle mounting portion 23 of the jack unit 20 is fixed on the outer periphery of the axle 9.

  Thereafter, the same operation as described above is repeated for the remaining three axles 9 of the lower traveling body 2 of the crawler crane 1, so that individual jack units are provided on the four axles 9 of the lower traveling body 2 of the crawler crane 1. 20 is attached. In addition, when attaching the jack unit 20 with respect to each axle 9 of the lower traveling body 2 of the crawler crane 1 as described above, a rope for hanging the hanging metal fitting 41 provided on the jack beam 21 of each jack unit 20 is used. In order to avoid interference with the upper swing body 5 (see FIG. 1 (a)) of the crawler crane 1 and to perform the mounting work efficiently, the right front axle 9 and the left rear axle are used. When the jack unit 20 is attached to 9, the upper turning body 5 is turned to the left by 45 degrees obliquely from the front, while the left front axle 9 and the right rear axle are turned. When attaching the jack unit 20 to 9, the upper turning body 5 should be turned to the right by 45 degrees diagonally from the front. Preferred.

  Further, the pedestal 40 is arranged immediately below the operating rod 22a in the jack cylinder 22 of each jack unit 20.

  When the left and right crawlers 4 of the crawler crane 1 are removed after the individual jack units 20 are attached to the four axles 9 of the lower traveling body 2 of the crawler crane 1 as described above, As shown in FIG. 3A, when the operation rod 22a is extended by the jack cylinder 22 of each jack unit 20, the crawler crane 1 is jacked up so that the left and right crawlers 4 are separated from the ground surface. become.

  Therefore, thereafter, as shown in FIG. 3B, the left and right crawlers 4 are sequentially extracted from the left and right axles 9 of the lower traveling body 2 and removed.

  Thereafter, when the crawler crane 1 from which the left and right crawlers 4 are removed from the lower traveling body 2 is loaded on the trailer 39, first, as shown in FIG. The crawler crane 1 with the crawler 4 removed is further jacked up, and then attached to the two axles 9 on the front side of the lower traveling body 2 of the crawler crane 1. A trailer 39 is inserted from the side between the jack cylinder 22 of the jack unit 20 and the jack cylinder 22 of each jack unit 20 attached to the two rear axles 9.

  Next, as shown in FIG. 4B, a rootstock is placed on the trailer 39 at a position below the lower traveling body 2 of the crawler crane 1 and avoiding the jack units 20 attached to the axles 9. After the 43 is disposed, the jack cylinders 22 of the jack units 20 are contracted to place the lower traveling body 2 of the crawler crane 1 on the rootstock 43.

  Thereafter, as shown in FIG. 4C, after the jack units 20 are removed from the axles 9 of the lower traveling body 2 of the crawler crane 1, the upper turning body 5 is directed to the front of the trailer 39. Then, secure them using a jig as appropriate. The removed crawler 4 may be loaded and transported on another trailer (not shown).

  What is necessary is just to perform the attachment operation | work of the crawler 4 with respect to the crawler crane 1 of the said decomposition | disassembly state in the reverse procedure of the removal operation | work of the crawler 4 mentioned above.

  Thus, according to the jack-up device of the crawler type construction machine of the present invention, both the left and right sides of the front and rear end portions of the car body 3 of the lower traveling body 2 even if the crawler crane 1 is of a type not provided with a jack cylinder. By using the axles 9 provided for attaching the crawlers 4 to the outer periphery of the axles 9, the axle attachment portions 23 of the individual jack units 20 are detachably attached to the outer periphery of the axles 9. 22 can be attached via the jack beam 21. Further, the jack units 20 are positioned on the axles 9 in order to position the crawler 4 attached to the axle 9 by the crawler crane 1. The link mounting bracket 13 and the link mounting bracket 37 provided on the jack beam 21 of the jack unit 20 are connected to the jack unit positioning link by using the link mounting brackets 13 that are already provided at the left and right end positions of the jack unit 20. This can be done by connecting via 38. Therefore, the jack unit 22 is provided on the crawler crane 1 side for easily retrofitting the jack unit 20 without any modification requiring welding work and jacking up the crawler crane 1. Can do.

  Moreover, the jack unit 20 is connected between the shim 31 arranged on the lower surface side of the horizontal portion 27a of the L-shaped bracket 27 and the stay 34 by the box-shaped bracket 32 attached to the upper position of the other longitudinal end surface of the jack beam 21. By appropriately adjusting the thickness of the shim 35 interposed in the crawler crane 1, even if there are some variations in the height and width dimensions of the axles 9 of the lower traveling body 2, In addition, the axle mounting portion 23 of the jack unit 20 can be securely mounted.

  Further, since the jack unit 20 can be attached to and detached from the axle 9 of the lower traveling body 2 of the crawler crane 1, a set of four jack units 20 is also attached to a plurality of crawler cranes 1. In this case, the crawler 4 can be removed from and attached to the lower traveling body 2 in the plurality of crawler cranes 1 in order, so that it is advantageous for cost reduction. .

  Furthermore, the jack unit 20 has a length dimension from the axle mounting portion 23 to the jack cylinder 22 because of the width dimension of the trailer 39 on which the crawler crane 1 is loaded, and the car body 3 of the lower traveling body 2 of the crawler crane 1. The jack cylinder 22 of each jack unit 20 is connected to the crawler crane because the length is set to be longer than a half of a value obtained by subtracting the dimension between the front and rear axles 9 provided on the front and rear axles 9. 1 can be used for jacking up work to load 1 on the trailer 39.

  The present invention is not limited to the above embodiment, and the axle mounting portion 23 of the jack unit 20 is detachable from the outer periphery of the axle 9 provided on the lower traveling body 2 of the crawler crane 1. If the jack beam 21 can be mounted so as not to rotate relative to the axle 9, a mounting structure other than that illustrated may be employed.

  The jack beam 21 adopts a shape other than the illustrated shape as long as the jack cylinder 22 extends substantially in the horizontal direction and has a downward-facing jack cylinder 22 attached to the distal end portion and an axle attachment portion 23 provided on the proximal end side. May be.

  The left and right crawlers 4 are provided with lower traveling bodies 2 in which left and right crawlers 4 are detachably attached to left and right axles 9 at both front and rear ends of the car body 3, and the left and right crawlers 4 are provided. The crawler type construction machine other than the crawler crane 1 can be applied to any crawler type construction machine that is desired to be detached.

  Of course, various modifications can be made without departing from the scope of the present invention.

1 shows one jack-up unit to be attached to an axle of a crawler crane as one embodiment of a jack-up device for a crawler type construction machine according to the present invention, where (a) is a schematic plan view, and (b) is a schematic side view. is there. 1 shows a procedure for mounting the jack-up device of FIG. 1 on a crawler crane, in which (A) is a schematic side view showing a state where an L-shaped bracket is placed above an axle, and (B) is a link provided on a jack beam. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic plan view showing a state in which a mounting bracket is connected to a link mounting bracket on the car body side with a link for positioning a jack unit, and (C) is a schematic side view showing a state in which the jack unit is attached to an axle. 1 shows the procedure for removing the left and right crawlers from the lower traveling body of the crawler crane equipped with the jack-up device of FIG. 1. (a) shows the state in which the crawler crane is jacked up by the jack cylinder of each jack unit. (B) is a schematic front view showing a state in which the crawler is removed from the crawler crane that has been jacked up. 1 shows a procedure for loading a crawler crane with a crawler removed from a lower traveling body onto a trailer using the jack-up device of FIG. (C) is a schematic side view showing a state where the crawler crane is placed on a rootstock disposed on the upper side of the trailer, and (c) is a schematic side view showing a state where the crawler crane is loaded on the trailer. The crawler crane of the form which is not equipped with the conventional jackup apparatus is shown, (A) is a schematic side view, (B) is a partially cut schematic perspective view which shows a lower traveling body. It is a schematic diagram which shows the lower traveling body in the crawler crane of the type provided with the conventional jackup apparatus.

Explanation of symbols

1 Crawler crane (crawler type construction machine)
2 Lower traveling body 4 Crawler 9 Axle 13 Link mounting bracket 14 Crawler fixing link 20 Jack unit 21 Jack beam 22 Jack cylinder 23 Axle mounting part 24 Projection part 25 Bending part 25a Bracket 26 Bracket 27 L-shaped bracket 31 Shim 32 Box-type bracket 34 Stay 35 Shim 37 Link mounting bracket 38 Jack unit positioning link 39 Trailer

Claims (7)

  A jack unit in which a downward jack cylinder is attached to one end portion of a jack beam extending in a substantially horizontal direction and an axle attachment portion is provided on the other end portion of the jack beam is formed, and a lower traveling body of a crawler type construction machine is formed. A crawler type characterized in that it has a structure in which an axle mounting portion of an individual jack unit is detachably attached to an axle provided to attach a crawler to the left and right positions of both front and rear end portions so as to be displaceable in the left and right directions. Jacking up equipment for construction machinery.   The jack-up device for a crawler type construction machine according to claim 1, wherein the axle mounting part is configured to be detachably attached to an outer periphery of an axle of a lower traveling body of the crawler type construction machine.   Bending the axle mounting part horizontally from the lower edge of the other end of the jack beam in the longitudinal direction with a dimension slightly larger than the width of the axle, and bending upward from the protruding end of the protruding part to the required dimension A bent portion, a bracket provided at the bent portion, and an L-shaped bracket detachably connected between the bracket and a bracket provided at the upper end edge of the other end surface in the longitudinal direction of the jack beam. The jack-up device for a crawler type construction machine according to claim 2, which is configured as described above.   4. A jack for a crawler construction machine according to claim 3, wherein a box-type bracket whose width dimension can be adjusted by a shim interposed between the stay and the stay is provided detachably on the upper end of the other end surface in the longitudinal direction of the jack beam. Up device.   The jack-up device for a crawler type construction machine according to claim 3 or 4, wherein a shim is attached to the lower surface side of the L-shaped bracket.   A link mounting bracket is provided on the side surface of the jack beam, and the link mounting bracket on the side surface of the jack beam is connected to the link mounting brackets provided at the left and right ends of the front and rear ends of the lower traveling body of the crawler type construction machine. 6. A jack-up device for a crawler type construction machine according to claim 1, wherein the jack unit positioning link is provided.   The length from the axle mounting part to the jack cylinder in the jack unit, the width between the trailer on which the crawler construction machine is loaded, and the distance between the front and rear axles provided on the lower traveling body of the crawler construction machine The jack-up device for a crawler type construction machine according to claim 1, wherein the jack-up device is set to be longer than a dimension that is ½ of a value obtained by subtracting.

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