JP6628637B2 - Crawler crane car body weight mounting method - Google Patents

Description

  The present invention relates to a method of attaching a car body weight to a crawler crane, and more particularly to a car body weight attachment for a crawler crane that attaches a car body weight to a car body provided with a jack used when attaching / detaching a crawler to / from a lower traveling body. About the method.

  A crawler crane is provided with an upper revolving body rotatably on an upper part of a lower traveling body having a crawler, and a boom is supported on the upper revolving body so that the boom can be raised and lowered. Since it is necessary to remove the crawler from the undercarriage, the car body is provided with a jack so that the car body can be supported when the crawler is attached or detached (for example, see Patent Document 1).

JP 2014-125282 A

  In the above-mentioned Patent Document 1, the inside of the car body of a pair of jacks provided at both ends of the front surface of the car body, and the inside of the car body of a pair of jacks provided at both ends of the rear surface of the car body, The car body weights are connected one by one, but since the connecting space is narrow, the connecting work is troublesome and there is a danger that the worker may be pinched.

  Therefore, an object of the present invention is to provide a method of attaching a car body weight of a crawler crane that can safely and easily attach a car body weight to a car body of the crawler crane.

  In order to achieve the above object, a method of attaching a car body weight of a crawler crane according to the present invention includes a car body inner portion of a pair of jacks provided at both front end portions of the car body of the crawler crane, and a rear end portion of the car body. A car body weight mounting method for a crawler crane in which one car body weight is connected to a car body weight of a pair of jacks provided on a car body weight mounting stage, and one car body weight is mounted on a car body weight mounting stage. A first car body weight placing step of placing a car, and a crawler crane running on its own, straddling the stage, and the jack car provided at one of both front and rear ends of the car body. A first crawler crane self-propelling step of disposing the car body weight on a body inner part; A first stage connecting step of connecting the stage and the jack, and a first car body weight connecting step of operating the jack to raise the stage and connecting the one car body weight to the car body. A first stage separation step of operating the jack to lower the stage, disconnecting the stage and the jack, and moving the crawler crane, and placing the other car body weight on the stage A second car body weight mounting step, and a crawler crane running on its own, straddling the stage, and the car body inner portion of the jack provided at one of the front end and the rear end of the car body. A second crawler crane self-propelling step of disposing the car body weight on the stage; A second car body weight connecting step of connecting the jack to the car body, a second car body weight connecting step of operating the jack to raise the stage, and connecting the other car body weight to the car body. The stage is lowered by operation, the connection between the stage and the jack is released, and a second stage separation step of moving the crawler crane is sequentially performed.

  According to the car body weight mounting method of the crawler crane of the present invention, after placing the car body weight on the stage, the stage and the jack are connected, and the jack body is operated to raise the car body weight together with the stage to a predetermined position. In this state, the car body weight can be connected to the car body without using a crane, so that the car body weight can be safely and easily attached to the car body.

It is a top view explanatory view of the 1st crawler crane self-propelling process which shows the 1st form example of this invention. It is a side view explanatory drawing of a 1st crawler crane self-propelled process similarly. It is a side view explanatory view of a 1st stage connection process similarly. It is a front view explanatory drawing of a 1st stage connection process similarly. It is a side view explanatory drawing at the time of aligning the position of a car body weight and a car body in the 1st car body weight connection process similarly. FIG. 7 is a front view explanatory view when the positions of the car body weight and the car body are aligned in the first car body weight connecting step. It is a side view explanatory drawing at the time of connecting a car body weight to a car body in a 1st car body weight connection process similarly. FIG. 4 is an explanatory plan view when a car body weight is connected to a car body in a first car body weight connecting step. It is a side view explanatory drawing of a 1st stage separation process similarly. It is a side view explanatory drawing of a 2nd crawler crane self-propelled process similarly. It is a side view explanatory drawing at the time of matching the position of a car body weight and a car body in the 2nd car body weight connection process similarly. It is a side view explanatory view of a 2nd stage separation process similarly. It is a perspective view of a stage and a car body weight similarly. It is a side view of a crawler crane. It is a crawler crane and the principal part side view of a stage which show the 2nd form example of this invention. FIG. It is a perspective view of a stage and a car body weight similarly.

  First, as shown in FIG. 14, the crawler crane 11 has a lower traveling body 12 and an upper revolving body 13 that is rotatably provided above the lower traveling body 12. An equipment room 13a (engine room) provided with an engine, a hydraulic pump, and the like, and a plurality of winches (not shown) around which a main winding rope 14a, an auxiliary winding rope 14b, and an up-and-down rope 14c are respectively wound are provided at a central portion. At the front, a boom 15 that can be tilted in the front-rear direction and a driver's seat 13b are provided, and at the rear, a plurality of counterweights 16 are mounted on a base 13c.

  The lower traveling body 12 includes a car body 17 provided with a swivel bearing 17a at the upper center and side frames 18 mounted on both sides of the car body 17 via a pair of axles 18a and expansion / contraction cylinders 18b. A crawler 18c is mounted on the 18.

  A jack bracket 17b composed of two upper and lower horizontal plate-like bodies is provided at both front and rear ends of the car body 17, and a jack 19 is attached to the tip of the jack bracket 17b. The base ends of the arms 19a are each rotatably mounted. At the inner side of the car body of each jack bracket 17b, a car body side connecting arm 17c formed of a vertical plate for mounting the car body weight 20 is provided at the end of the horizontal plate. The connection arms 17c are connected to each other, and a connection pin insertion hole 17d is formed in each of the car body side connection arms 17c. The lower part of the car body weight 20 is abutted between the car body-side connecting arms 17c, 17c on the front surface of the car body 17 and between the car body-side connecting arms 17c, 17c on the rear surface of the car body 17. The contact arms 17e that support the car body weights 20 are protrudingly provided.

  The jack 19 is formed so as to be movable between a storage position and a working position by rotating a jack arm 19a around a jack bracket 17b, and a ground plate (not shown) is attached to and detached from the lower end of the jack 19. When the grounding plate is removed, the jack-side connecting arm 19b composed of two plate-like bodies projecting downward at a predetermined interval is exposed and fixed to the jack-side connecting arm 19b. A pin mounting hole 19c is formed.

  The car body weights 20 include jack brackets 17b, 17b arranged at both ends on the front side of the car body 17 and jack brackets 17b, 17b arranged at both ends on the rear side with the jack 19 stored in the storage position. Weight-side connecting arms 20a, 20a each formed of two vertical plate-like members sandwiching the car body-side connecting arms 17c, 17c, respectively, are provided at both ends in the width direction. A connection pin mounting hole 20b is formed in each of the connection arms 20a. In addition, suspension metal fittings 20c, 20c protrude from the upper surface of the car body weight 20, and a lower end of the side surface between the weight-side connecting arms 20a, 20a contacts a support arm 17e of the car body 17. A contact portion 20d is provided.

  When transporting the crawler crane 11, usually, the car body weight 20 is removed from the car body 17, each jack 19 is extended to the working position, the jack 19 is operated, and the car body 17 is raised to disengage the crawler 18. The crawler 18 is taken out of the axle 18a with the ground contact state. Accordingly, the car body 17 connected to the upper swing body 13 from which the boom 15 has been removed, the pair of crawlers 18, and the pair of car body weights 20 can be transported in a disassembled state. At the work site, the car body weights 20, 20 are attached to and detached from the car body 17 using the car body weight mounting stage 21.

  As shown in FIG. 13, the stage 21 is provided on a substrate 21a, an upper plate 21b disposed on the substrate 21a, and both ends of the upper plate 21b, and positions and mounts the car body weight 20. It has a front mounting portion 21c and a rear mounting portion 21d. The board 21a has a length substantially the same as the length of the crawler 18 in the front-rear direction of the vehicle, a width smaller than the width between the crawlers 18 and 18, and the jacks 19, 19 and a width longer than the width between the jacks 19 arranged at both ends of the rear surface. The upper plate 21b is formed in a rectangular shape smaller than the substrate 21a, and the front mounting portion 21c is located at a position corresponding to the front car body side connection arms 17c, 17c, and the rear car body side connection arms 17c, 17c. The rear mounting portions 21d are respectively provided at positions corresponding to. Further, at both ends of the board 21a at positions corresponding to the jack-side connecting arms 19b of the respective jacks 19 in the retracted state, four stages respectively arranged between the two plate-like bodies of the jack-side connecting arms 19b. A side connecting arm 21e is formed, and a fixed pin insertion hole 21f is formed in each stage side connecting arm 21e. Further, when the jack 21 is connected to the stage-side connecting arm 21e and the stage 21 is raised by operating the jack 19, the positions of the car body-side connecting arm 17c and the weight-side connecting arm 20a are matched. It has become.

  In the second embodiment of the present invention shown in FIGS. 15 to 17, a ball seat 19 d is provided at the tip of the jack 19, and the receiving portion 21 g of the ball seat 19 d is provided on the stage 21. The ball seat 19d and the receiving portion 21g are detachably connected by a connecting pin 24. When the ball seat 19d is connected to the receiving portion 21g, the positions of the car body side connecting arm 17c and the weight side connecting arm 20a are spherical. It is formed so as to be automatically fitted (the same components as those in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted).

  Next, a procedure for attaching the car body weights 20, 20 to the car body 17 at the work site will be described with reference to the first embodiment shown in FIGS. First, as shown in FIGS. 1 and 2, a wire is attached to one of the hanging members 20c, 20c of one of the car body weights 20, and the car body weight 20 is lifted by a crane, and the car body weight 20 is placed on the front mounting portion 21c of the stage 21. A first car body weight placing step of placing the first car body weight on the first car body.

  Next, after removing the grounding plate at the tip end of each jack 19 and exposing the jack-side connecting arm 19b, the crawler crane 11 is allowed to run by itself, straddling the stage 21, and being attached to both ends of the front surface of the car body 17. A first crawler crane self-propelling step of arranging the car body weight 20 between the provided jack brackets 17b, 17b is performed.

  Next, as shown in FIGS. 3 and 4, each stage-side connecting arm 21e of the stage 21 is inserted between the two plate-like bodies of each jack-side connecting arm 19b, and is fixed to the fixing pin mounting hole 19c. A first stage connecting step of connecting the stage 21 and the jack 19 by mounting the fixing pins 22 over the pin insertion holes 21f is performed.

  Further, as shown in FIGS. 5 and 6, the jack 19 is operated to raise the car body weight 20 together with the stage 21 so that the car body side connection between the two plate-like bodies of the weight side connection arm 20a. 7 and 8, the connecting pins 23 are mounted over the connecting pin mounting holes 20b and the connecting pin insertion holes 17d as shown in FIGS. 7 and 8, and the contact portions 20d are connected to the contact arms 17e. , And a first car body weight connecting step of attaching one car body weight 20 to the front side of the car body 17 is performed.

  Next, as shown in FIG. 9, the jack 19 is operated to lower the stage 21 to ground, and the fixing pin 22 is removed to release the connection between the stage 21 and the jack 19. Then, a first stage separation step of moving the car body weight 20 to the side to which the car body weight 20 is attached is performed.

  Further, as shown in FIG. 10, a second car body weight for attaching a wire to the hanging metal fitting of the other car body weight 20, lifting the car body weight 20 with a crane, and mounting the car body weight 20 on the rear mounting portion 21 d of the stage 21. After performing the placing process, the crawler crane 11 is allowed to move by itself, and the other car body weight 20 is arranged between the jacks 19 provided at both ends of the rear surface of the car body 17 across the stage 21. Perform 2 crawler crane self-propelled process.

  Next, as shown in FIG. 11, each stage-side connecting arm 21e of the stage 21 is inserted between the two plate-like bodies of each jack-side connecting arm 19b, and the fixing pin mounting hole 19c is inserted through the fixing pin inserting hole 19c. After performing the second stage connecting step of connecting the stage 21 and the jack 19 by mounting the fixing pin 22 over the hole 21f, the jack 19 is operated to raise the car body weight 20 together with the stage 21. Then, the car body side connecting arms 17c are respectively arranged between the two plate-like bodies of the weight side connecting arms 20a, and the connecting pins 23 are respectively mounted over the connecting pin mounting holes 20b and the connecting pin inserting holes 17d. Then, a second car body weight connecting step of attaching the other car body weight 20 to the rear side of the car body 17 is performed.

  Then, as shown in FIG. 12, the jack 19 is operated to lower the stage 21 to ground, and the fixing pin 22 is removed to release the connection between the stage 21 and the jack 19, and the crawler crane 11 is moved. A second stage separation step is performed. Thereby, the car body weights 20, 20 can be respectively attached to the car body side connecting arms 17c provided on the front surface and the rear surface of the car body 17, respectively.

  In the present embodiment, as described above, after placing the car body weight 20 on the stage 21, the stage 21 and the jack 19 are connected, and the car body weight 20 is moved together with the stage 21 to a predetermined position by operating the jack 19. Since the car body weight 20 can be connected to the car body 17 in the raised state, the car body weights 20, 20 can be safely and easily attached to the car body 17. Further, conventionally, the car body weight 20 is attached to the car body 17 by being suspended by a crane. However, it is not necessary to suspend by the crane.

  Note that the present invention is not limited to the above-described embodiment, and the stage may include a mounting portion for a car body weight on a rectangular substrate and an upper plate having a length dimension on which one car body weight can be mounted. Only one may be provided. The order in which the front car body weight and the rear car body weight are attached to the car body is arbitrary. Further, each car body weight can be removed from the car body in a procedure reverse to the above procedure.

11 crawler crane, 12 lower traveling body, 13 upper revolving superstructure, 13a equipment room, 13b operator's cab, 14a main winding rope, 14b auxiliary winding rope, 14c hoisting rope, 15 boom, 16 ... Counterweight, 17 ... Car body, 17a ... Slewing bearing, 17b ... Jack bracket, 17c ... Car body side connection arm, 17d ... Connection pin insertion hole, 17e ... Contact arm, 18 ... Side frame, 18a ... Axle, 18b ... Cylinder, 18c ... Crawler, 19 ... Jack, 19a ... Jack arm, 19b ... Jack side connecting arm, 19c ... Fixing pin mounting hole, 20 ... Car body weight, 20a ... Weight side connecting arm, 20b ... Connection pin mounting hole , 20c: hanging bracket, 20d: contact part, 21: stage, 21a: substrate, 21b: upper plate, 21c: front Portion, 21d ... rear mounting portion, 21e ... stage side linking arm, 21f ... fixing pin insertion hole, 21g ... receiving unit, 22 ... fixing pins, 23, 24 ... connecting pin

Claims (1)

Car body weights are respectively attached to the inside of the car body of a pair of jacks provided at both ends of the front of the car body of the crawler crane and the inside of the car body of a pair of jacks provided at both ends of the rear of the car body. In the method of attaching the car body weight of the crawler crane to connect one by one,
A first car body weight placing step of placing one car body weight on a car body weight placing stage;
A first crawler that runs a crawler crane by itself and straddles the stage and arranges the car body weight on the inside of the car body of the jack provided at one of both front and rear ends of the car body Crane self-propelled process,
A first stage connection step of connecting the stage and the jack, respectively;
A first car body weight connecting step of operating the jack to raise the stage and connecting the one car body weight to the car body;
A first stage separation step of operating the jack to lower the stage, disconnecting the stage and the jack, and moving the crawler crane;
A second car body weight placing step of placing the other car body weight on the stage;
A second crawler that runs a crawler crane by itself and straddles the stage and arranges the car body weight on the inside of the car body of the jack provided on either the front end or the rear end of the car body. Crane self-propelled process,
A second stage connecting step of connecting the stage and the jack, respectively;
A second car body weight connecting step of operating the jack to raise the stage and connecting the other car body weight to the car body;
A second stage separating step of operating the jack to lower the stage to release the connection between the stage and the jack, and to move the crawler crane. Mounting method.

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