JP7039200B2 - Split counterweight - Google Patents

Description

The present invention relates to a split counterweight mounted on a swivel body of a mobile crane.

In a mobile crane, in order to improve workability and safety, a counterweight for balancing the weight is generally attached to the rear part of the swivel body. As a kind of counterweight, a split type counterweight is known in which a plurality of split weights are combined to form a counterweight.

Patent Document 1 discloses one such split counterweight. In this split-type counterweight, weights are stacked in the lower center of the rear part of the swivel table of the mobile crane, and desired split weights are stacked on the left and right of the split counterweight according to the lifting performance of the crane truck. The split weight has the same shape on the left and right, and can be used in common on the left and right.

Patent Document 2 discloses another split counterweight. This split counterweight has a plurality of blocks of the same shape that are stacked one above the other. The block has a substantially rectangular parallelepiped shape, and can be connected to another block even when the block is rotated by 180 °, and the block can be easily attached regardless of the orientation of the block. Each block has a fastening portion that is fastened by a fastener (for example, a bolt) that fastens the blocks to each other. As a result, the stacked blocks can be fastened with fasteners (bolts).

Japanese Patent No. 4943715 Japanese Patent No. 5167070

In the split counterweight disclosed in Patent Document 1, the split weights arranged on the left and right have a shape that is rotationally symmetric on the left and right. Therefore, in order to balance the weight on the left and right, for example, when the split weight on the left side is transferred to the right side, it is necessary to rotate the split weight by 180 °. This rotation work needs to be performed while the split weights are still lifted, or after the lifted split weights are once lowered to the ground. Since the split weight is very heavy, it is not only time-consuming to rotate it in a suspended state, but also the split weight may shake. In addition, it is not only time-consuming to lower the ground once and then rotate it, but also because it is a heavy object, it requires power to rotate it. When attaching the split weights stacked on the ground to the swivel of a mobile crane, it is necessary to turn the left and right separately and prepare them on the ground in consideration of the time and effort of mounting.

In the split counterweight disclosed in Patent Document 2, a fastener is required to fasten the blocks to each other, and a fastening tool is also required. Fasteners are prepared as separate parts and may be lost.

As described above, it can be said that these split counterweights have some difficulty in terms of workability.

The present invention has been made in consideration of such an actual situation, and an object of the present invention is to provide a split counterweight having excellent workability.

The present invention is a split-type counterweight mounted on a swinging body of a mobile crane, and is composed of a base weight that is detachably configured on the swinging body and a split-type loading weight that is placed on the base weight. Has been done. The split-type loading weight is composed of a plurality of split-type center loading weights and a plurality of split-type side loading weights mounted on the sides of the split-type center loading weight. Each split-type side loading weight is configured to be stackable with other split-type side loading weights. Each split-type side loading weight is formed plane-symmetrically with respect to a vertical plane including a straight line extending vertically through its center and a straight line extending in the front-rear direction through its center. Each split type side loading weight is equipped with a connecting mechanism. The connecting mechanism provided in each split type side loading weight can be connected to the connecting mechanism provided in other split type side loading weights stacked with each other, and is provided in two split type side loading weights stacked with each other. By connecting the connected connecting mechanisms to each other, the two split type side loading weights stacked on each other are configured to be fixed to each other, and the connecting mechanism can be stored in the storage position when not connected to each other. It has a storage structure. The connecting mechanism is composed of an upper connecting mechanism and a lower connecting mechanism. The upper connecting mechanism provided on each split type side loading weight can be connected to the lower connecting mechanism provided on other split type side loading weights stacked on the upper connecting mechanism, and is provided on each split type side loading weight. The lower connecting mechanism provided can be connected to the upper connecting mechanism provided on the other split side loading weights stacked under the lower connecting mechanism, and the upper side provided on the two split side loading weights stacked with each other. The connecting mechanism and the lower connecting mechanism are configured to fix the two split side loading weights stacked on each other to each other by being connected to each other. Further, the lower connecting mechanism includes a connecting link having a swing plate, and when the connection with the upper connecting mechanism is released, it is possible to take a retracted state in which the swing plate is stored. Is.

According to the present invention, a split counterweight having excellent workability is provided.

FIG. 1 shows a mobile crane according to an embodiment. FIG. 2 is a front view of the split counterweight shown in FIG. FIG. 3 is a plan view of the split counterweight shown in FIG. FIG. 4 is a side view of the split counterweight shown in FIG. FIG. 5 is a perspective view of two split type side loading weights connected to each other. FIG. 6 shows the lower coupling mechanism in the coupled state together with two split side loading weights. FIG. 7 shows the lower coupling mechanism in the retracted state together with two split side loading weights. FIG. 8A shows a lower coupling mechanism in a coupled state. FIG. 8B shows a lower connecting mechanism from which the retaining pin has been pulled out. FIG. 8C shows a lower connecting mechanism from which the connecting pin member is pulled out. FIG. 8D shows the lower coupling mechanism in which the swing plate is rotated. FIG. 8E shows a lower connecting mechanism into which the connecting pin member is pushed. FIG. 8F shows the lower connecting mechanism in the retracted state.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 shows a mobile crane 10 according to the present embodiment. As shown in FIG. 1, the crane vehicle 10 includes a traveling body 20 capable of traveling and a crane 40 installed on the traveling body 20.

The traveling body 20 includes a mounting table 24 on which the crane 40 is mounted, and a driver's seat 26 for controlling the traveling of the traveling body 20. The mounting base 24 is supported by a plurality of wheels 22. The wheels 22 are configured to be driveable by a drive mechanism (not shown), and some wheels 22 are configured to be steerable by a steering mechanism (not shown). The driver's seat 26 is provided with a plurality of control devices such as an accelerator, a brake, and a steering wheel, and these control devices are configured to control the drive and steering of the wheels 22. Further, the mounting table 24 is provided with an outrigger 28 for stably supporting the mounting table 24 with respect to the ground when the crane 40 is working.

The crane 40 includes a swivel body 42 rotatably mounted on a mounting table 24, a boom 46 for lifting a load, and an undulating cylinder 48 for undulating the boom 46. The boom 46 and the undulating cylinder 48 are mounted on the swivel body 42. The swivel body 42 is provided with a driver's seat 44. The driver's seat 44 is provided with a plurality of operating levers and the like, and these operating levers and the like are configured to be able to control the turning of the swivel body 42, the undulation of the boom 46, and other operations such as lifting of a load. Has been done.

The boom 46 is generally stretchable, and depending on the undulation angle of the boom 46, the weight balance of the crane 40 is very high, especially when the undulation angle of the boom 46 is small (close to horizontal) when the boom 46 is extended. Becomes unbalanced. In order to suppress such an imbalance in weight, a counterweight is usually attached to the rear part of the swivel body 42. In the present embodiment, the counterweight mounted on the rear portion of the swivel body 42 is a split type counterweight 100 composed of a plurality of weights.

FIG. 2 is a front view of the split counterweight 100 as viewed from the rear. FIG. 3 is a plan view of the split counterweight 100 as viewed from above. FIG. 4 is a side view of the split counterweight 100 as viewed from the side. Here, regarding the split type counterweight 100, in the posture mounted on the swivel body 42, the direction approaching the swivel axis of the swivel body 42 is the front, the direction away from the swivel axis of the swivel body 42 is the rear direction, and the front-rear direction thereof. On the other hand, for example, the direction of crossing substantially vertically is set as the side.

As shown in FIG. 2, the split counterweight 100 mounted on the rear portion of the swing body 42 of the mobile crane 10 is above the base weight 200 and the base weight 200 which are detachably configured on the rear portion of the swing body 42. It is composed of a split type loading weight 300 mounted on the.

The base weight 200 has a center portion 200a projecting to the rear of the swivel body 42 and a side portion 200b projecting to the side of the center portion 200a in a state of being mounted on the rear portion of the swivel body 42. Further, the base weight 200 has a mounting portion 210 that is detachably attached to the rear portion of the swivel body 42 (see FIG. 3).

The split-type loading weight 300 is composed of a plurality of split-type center loading weights 310 and a plurality of split-type side loading weights 360 mounted on the sides of the split-type center loading weight 310. That is, the split-type loading weight 300 includes a plurality of split-type center loading weights 310 mounted on the center portion 200a of the base weight 200, and a plurality of split-type loading weights 300 mounted on the side portions 200b of the base weight 200. It is composed of a mold side loading weight 360.

The plurality of split center loading weights 310 are all composed of the same structure. Further, the plurality of split type side loading weights 360 are all configured with the same structure as in the split type center loading weight 310.

Each split-type center loading weight 310 is configured to be stackable with other split-type center loading weights 310. Each split-type center loading weight 310 has a convex portion 312 on the upper surface for positioning and prevention of misalignment, and a concave portion 314 on the lower surface for receiving the convex portion 312. Preferably, each split center loading weight 310 has a plurality of protrusions 312 and a plurality of recesses 314. The convex portion 312 and the concave portion 314 are not limited to this, but are provided at the four corners, for example, as shown in FIG.

Similarly, each split-type side loading weight 360 is configured to be stackable with another split-type side loading weight 360. Each split type side loading weight 360 has a convex portion 362 on the upper surface for positioning and prevention of misalignment, and a concave portion 364 on the lower surface for receiving the convex portion 362. Preferably, each split side loading weight 360 has a plurality of protrusions 362 and a plurality of recesses 364. The convex portion 362 and the concave portion 364 are not limited to this, but are provided at the four corners, for example, as shown in FIG.

Further, the center portion 200a of the base weight 200 has a convex portion 220 on the upper surface that engages with the concave portion 314 of the split type center loading weight 310. Similarly, the side portion 200b of the base weight 200 has a convex portion 230 on the upper surface that engages the concave portion 364 of the split type side loading weight 360.

As shown in FIG. 3, the split center loading weight 310 and the split side loading weight 360 further include a portion of the base weight 200 on which the split center loading weight 310 and the split side loading weight 360 are placed, that is, the center. The portion 200a and the side portion 200b extend along the arc C. The arc C extends, for example, on the circumference centered on the swivel axis of the swivel body 42.

Here, for each split type center loading weight 310, in the posture when mounted on the rear part of the swivel body 42, the direction approaching the swivel axis of the swivel body 42 is the front, and the direction away from the swivel axis of the swivel body 42 is the rear direction. And. Under this assumption, each split-type center loading weight 310 is formed plane-symmetrically with respect to a vertical plane P1 including a straight line extending in the vertical direction through the center and a straight line extending in the front-rear direction through the center. It has been.

Similarly, for each split type side loading weight 360, in the posture when mounted on the rear part of the swivel body 42, the direction approaching the swivel axis of the swivel body 42 is the front, and the direction away from the swivel axis of the swivel body 42 is the rear direction. And. Under this assumption, each split-type side loading weight 360 is formed plane-symmetrically with respect to a vertical plane P2 including a straight line extending in the vertical direction through the center and a straight line extending in the front-rear direction through the center. It has been.

In the following description, the orientations of the split center load weight 310 and the split side load weight 360 are all in the posture when the split counterweight 100 is mounted on the rear part of the swivel body 42. That is, front and back refer to the above-mentioned directions along the front and rear, up and down refer to the above-mentioned vertical direction, and left and right or sideways refer to the above-mentioned direction along the arc C. do.

As shown in FIG. 4, each split type side loading weight 360 includes a coupling mechanism 600. For example, each split type side loading weight 360 includes a pair of connecting mechanisms 600 provided on the left and right side surfaces, as shown in FIG. The connecting mechanism 600 is provided, for example, at the bottom of a vertically extending groove provided on the side surface of the split type side loading weight 360 in order to prevent it from protruding. The connecting mechanism 600 provided on each split type side loading weight 360 can be connected to the connecting mechanism 600 provided on the other split type side loading weights 360 stacked on each other. Further, the connecting mechanism 600 provided in each split type side loading weight 360 is stacked with each other by connecting the connecting mechanism 600 provided in the two split type side loading weights 360 stacked with each other. The two split side loading weights 360 are configured to be fixed to each other.

Further, each split type center loading weight 310 also has a connecting mechanism (not shown). For example, each split-type center loading weight 310 includes a pair of connecting mechanisms provided on the left and right side surfaces. The connecting mechanism provided in each split-type center loading weight 310 can be connected to the connecting mechanism provided in other split-type center loading weights 310 stacked with each other. Further, the connecting mechanism provided in each split type center loading weight 310 is two splits stacked in each other by connecting the connecting mechanisms provided in the two split type center loading weights 310 stacked with each other. The mold center loading weights 310 are configured to be fixed to each other.

Specifically, as shown in FIG. 4, the coupling mechanism 600 is composed of an upper coupling mechanism 400 and a lower coupling mechanism 500. The upper connecting mechanism 400 provided in each split type side loading weight 360 is provided in the upper portion of each split type side loading weight 360, and the lower connecting mechanism 500 provided in each split type side loading weight 360 is provided. , Each split type side loading weight 360 is provided in the lower portion.

As shown in FIG. 4, the upper connecting mechanism 400 provided in each split type side loading weight 360 is connected to the lower connecting mechanism 500 provided in another split type side loading weight 360 stacked on the upper connecting mechanism 400. It is possible. Further, the lower connecting mechanism 500 provided on each split type side loading weight 360 can be connected to the upper connecting mechanism 400 provided on another split type side loading weight 360 stacked under the lower connecting mechanism 500. The upper connecting mechanism 400 and the lower connecting mechanism 500 provided on the two split side loading weights 360 stacked on each other fix the two split side loading weights 360 stacked on each other to each other by being connected to each other. It is configured to do.

1 to 4 show an example in which a plurality of split-type center loading weights 310 and a plurality of split-type side loading weights 360 are placed on a base weight 200, and this is an example. Therefore, it is not always necessary to place the plurality of split-type center loading weights 310 and the plurality of split-type side loading weights 360 on the base weight 200.

For example, depending on the weight required at the time of use, only one split side loading weight 360 may be placed on the base weight 200, or the split side loading weight 360 may be placed on the base weight 200. It does not have to be placed at all.

Similarly, with respect to the split center loading weight 310, only one split center loading weight 310 may be placed on the base weight 200, or the split center loading weight 310 may be placed on the base weight 200. It does not have to be placed at all.

Further, in order to arrange a device such as a winch at the rear of the swivel body 42, the space is secured by not placing the split type center loading weight 310 on the base weight 200, and the required weight is the base weight. It may be obtained by placing the split type side loading weight 360 on the 200.

Hereinafter, the connecting mechanism 600, that is, the upper connecting mechanism 400 and the lower connecting mechanism 500 will be described in detail. FIG. 5 is a perspective view of two split side loading weights 360 connected to each other. As will be described later, the lower connecting mechanism 500 includes a connecting link 520 (see FIGS. 8A to 8F) having a swing plate 524, and is connected to the upper connecting mechanism 400 and the upper connecting mechanism 400. The connection with the oscillating plate 524 of the connecting link 520 is released, and the oscillating plate 524 of the connecting link 520 may be stored.

In FIG. 5, the lower connecting mechanism 500 of the upper split side loading weight 360 is in a connected state connected to the upper connecting mechanism 400 of the lower split side loading weight 360, and the lower split side loading is carried out. The lower connecting mechanism 500 of the weight 360 is in a stored state in which the swing plate 524 of the connecting link 520 is stored. FIG. 6 shows the lower connecting mechanism 500 in the connected state together with the two split side loading weights 360, and FIG. 7 shows the lower connecting mechanism 500 in the retracted state together with the two split side loading weights 360. Shown.

Subsequently, the details of the structures of the upper connecting mechanism 400 and the lower connecting mechanism 500 will be described with reference to FIGS. 8A to 8F.

As shown in FIGS. 8A to 8F, the upper connecting mechanism 400 has a mounting portion 410 attached to the split side loading weight 360 and a connecting plate 420 extending upward from the mounting portion 410. The mounting portion 410 and the connecting plate 420 are integrally formed. The attachment portion 410 is attached to the split side loading weight 360 by, for example, a bolt.

The connecting plate 420 has a through hole 420a for connecting to the lower connecting mechanism 500. The through hole 420a of the connecting plate 420 is not only used for connecting to the lower connecting mechanism 500, but also connecting to the lifting wire rope when lifting the split type side loading weight 360 to which the upper connecting mechanism 400 is attached. Can also be used. That is, the connecting plate 420 has a function of a hanging ring to which the lifting wire rope is connected.

The lower connecting mechanism 500 has a mounting portion 510 attached to the split side loading weight 360 and a connecting link 520 held by the mounting portion 510. The attachment portion 510 is attached to the split side loading weight 360, for example, by a bolt.

The connecting link 520 connects the fixed plate 522 fixed to the mounting portion 510, the pair of swing plates 524 swingably supported by the joint 526 with respect to the fixed plate 522, and the pair of swing plates 524 on the upper side. It has a connecting pin member 540 for connecting to the connecting plate 420 of the mechanism 400.

The pair of swing plates 524 has a swing plate 524A on the front side and a swing plate 524B on the back side. Here, the back side means the object to be attached to the lower connecting mechanism 500, that is, the side close to the split type side loading weight 360, and the front side means the side far from the split type side loading weight 360. ing.

The connecting pin member 540 has a base 542, a connecting pin 544 extending from the base 542, a connecting pin stopper 546 extending from the base 542, and a handle 548 provided on the base 542.

The connecting pin 544 extends through a through hole formed in the swing plate 524A and can be inserted into the through hole formed in the swing plate 524B. The through hole and the connecting pin 544 formed in the swing plates 524A and 524B are designed so that the connecting pin 544 is inserted into the through hole with an appropriate minute gap between them. As a result, the connecting pin member 540 is configured to be movable back and forth (front side and back side) with respect to the swing plate 524A.

The connecting pin stopper 546 has a pin portion 546a extending through a through hole formed in the swing plate 524A and an end portion 546b located at the tip of the pin portion 546a. The end portion 546b is formed to have a diameter larger than that of the pin portion 546a, and prevents the pin portion 546a and thus the connecting pin member 540 from completely coming off the swing plate 524A.

The handle 548 is provided so that the user can easily move the connecting pin member 540 back and forth (movement to the front side and the back side) with respect to the swing plate 524A. For example, the user can move the connecting pin member 540 back and forth with respect to the swing plate 524A by operating with one hand holding the handle 548.

The lower coupling mechanism 500 also has a retaining pin 560 to prevent an unintended disconnection of the coupling pin member 540. The retaining pin 560 is connected to the fall prevention string 564 via the ring 562, and the fall prevention string 564 is connected to the mounting portion 510.

The swing plate 524A is provided with a pair of retaining pin receiving portions 528 for receiving the retaining pin 560. The retaining pin receiving portion 528 projects toward the front side and has a through hole into which the retaining pin 560 is inserted.

The retaining pin 560 is inserted into the retaining pin receiving portion 528 in a state where the connecting pin member 540 is pushed inward. In this state, the base portion 542 of the connecting pin member 540 is arranged between the swing plate 524A and the retaining pin 560. As a result, when the connecting pin member 540 moves toward the front side, the base 542 hits the retaining pin 560 and the movement of the connecting pin member 540 is hindered, so that the connecting pin member 540 is prevented from being unintentionally removed.

The lower coupling mechanism 500 also has a storage plate 580 for supporting the pair of rocking plates 524 in the retracted state. The storage plate 580 is fixed to the mounting portion 510. The storage plate 580 has a through hole 580a into which the connecting pin 544 of the connecting pin member 540 can be inserted. The storage plate 580 supports the connecting pin 544 inserted into the through hole 580a to maintain the pair of swing plates 524 in a fixed position (storage position) in the stored state.

Next, the operation of switching the lower connecting mechanism 500 from the connected state to the stored state will be described with reference to FIGS. 8A to 8F.

In the state shown in FIG. 8A, the lower connecting mechanism 500 is in the connected state. In this state, the connecting pin member 540 is pushed to the back side, and the retaining pin 560 is inserted into the retaining pin receiving portion 528 and is located on the front side of the base portion 542 of the connecting pin member 540. Further, the connecting plate 420 of the upper connecting mechanism 400 is located between the pair of swing plates 524. Although not shown, the connecting pin 544 extends through a through hole 420a formed in the connecting plate 420 of the upper connecting mechanism 400, and the tip of the connecting pin 544 is formed in the rear swing plate 524B. It is inserted into the through hole. As a result, the lower connecting mechanism 500 is connected to the upper connecting mechanism 400.

When disconnecting the lower connecting mechanism 500 and the upper connecting mechanism 400, first, as shown in FIG. 8B, the retaining pin 560 is pulled out from the retaining pin receiving portion 528. As a result, the connecting pin member 540 is in a state of being movable back and forth.

Next, as shown in FIG. 8C, the connecting pin member 540 is pulled out until the end portion 546b of the connecting pin stopper 546 hits the swing plate 524A. In this state, the tip of the connecting pin 544 is out of the through hole formed in the swing plate 524B on the back side and the through hole 420a formed in the connecting plate 420 of the upper connecting mechanism 400. As a result, the pair of swing plates 524 can swing with respect to the fixed plate 522.

Subsequently, as shown in FIG. 8D, the pair of swing plates 524 are rotated about the joint 526 until the connecting pin 544 is aligned with the through hole 580a formed in the storage plate 580. In this state, the storage plate 580 is located between the pair of rocking plates 524.

Next, as shown in FIG. 8E, the connecting pin member 540 is pushed inward. In this state, although not shown, the connecting pin 544 extends through the through hole 580a formed in the storage plate 580, and the tip of the connecting pin 544 is formed in the swing plate 524B on the back side. It is inserted into the through hole. This prevents the pair of rocking plates 524 from rotating about the joint 526. The pair of rocking plates 524 are maintained in the retracted position.

Finally, as shown in FIG. 8F, the retaining pin 560 is inserted into the retaining pin receiving portion 528. As a result, the lower connecting mechanism 500 is in the retracted state. In this state, the base portion 542 of the connecting pin member 540 is arranged between the swing plate 524A and the retaining pin 560. This prevents the connecting pin member 540 from coming off unintentionally.

The operation of switching from the connected state to the stored state of the lower connecting mechanism 500 has been described above, but the operation of switching from the stored state to the connected state of the lower connecting mechanism 500 is performed by reversing the procedure described here.

The split counterweight 100 configured in this way is excellent in workability as described below.

Since the split-type center loading weight 310 and the split-type side loading weight 360 are each composed of the same structure, the stacking order is not restricted.

The split-type center loading weight 310 and the split-type side loading weight 360 have convex portions 312 and concave portions 314 and convex portions 362 and concave portions 364 for positioning and prevention of misalignment, respectively, so that they can be easily stacked. As well as being positioned, misalignment after stacking is prevented.

Since the split type side loading weight 360 is connected by the connecting mechanism 600 attached to it, that is, the upper connecting mechanism 400 and the lower connecting mechanism 500, it is possible to prepare a connecting part separately or a tool for the part. You don't even have to.

Further, since the upper connecting mechanism 400 and the lower connecting mechanism 500 are attached to the split type side loading weight 360, they are not likely to be lost unlike the connecting parts prepared as separate parts.

Since the connecting pin member 540 of the lower connecting mechanism 500 is prevented from completely coming off from the swing plate 524A by the connecting pin stopper 546, there is no concern that the connecting pin member 540 will be lost, unlike the separated parts.

A plurality of split type side loading weights 360 connected by the connecting mechanism 600 can be lifted and moved together.

Since the plurality of split type side loading weights 360 mounted on the base weight 200 are connected by the connecting mechanism 600, even if the crane vehicle 10 should fall, the plurality of split type side loading weights 360 are separated. It is prevented from spreading to.

Since the split type side loading weight 360 is formed symmetrically with respect to the vertical plane P2 extending in the front-rear direction through the center thereof, it is placed on the left side portion 200b of the base weight 200, for example. When transferring the split type side loading weight 360 onto the side portion 200b on the right side of the base weight 200, the split type side loading weight 360 may be transferred as it is with almost no change in direction while being lifted, 180. ° No need to rotate.

Further, as a preparatory step for mounting the split type side loading weight 360 on the swivel body 42, it is not necessary to stack the split type side loading weights on the ground or on the loading platform of the transport vehicle in different directions for left side mounting and right side mounting.

When the lower coupling mechanism 500 is in a retracted state that is not used for coupling to the upper coupling mechanism 400, the swing plate 524 is held in the retracted position by the coupling pin member 540 and the retracting plate 580, which is an obstacle. It doesn't become.

Further, since the connecting pin 544 of the connecting pin member 540 also serves as a component for maintaining the swing plate 524 in the retracted position, it is not necessary to separately provide a component for that purpose.

Since the connecting plate 420 of the upper connecting mechanism 400 has a function of a hanging ring to which the lifting wire rope is connected, it is not necessary to separately provide a hanging ring on the split type side loading weight 360 to which the upper connecting mechanism 400 is attached. ..

Since the connecting pin member 540 is provided with a handle 548, it is excellent in workability with one hand.

As a result, the efficiency of the mounting work of the split counterweight 100 on the swivel body 42 is improved, the mounting time on the swivel body 42 is shortened, and the safety of the mounting work is also improved.

Although the embodiments of the present invention have been described with reference to the drawings, the present invention is not limited to these embodiments, and various modifications and changes are made without departing from the gist thereof. May be good.

10 ... crane car, 20 ... traveling body, 22 ... wheel, 24 ... mounting table, 26 ... driver's seat, 28 ... outrigger, 40 ... crane, 42 ... swivel body, 44 ... driver's seat, 46 ... boom, 48 ... undulating cylinder , 100 ... split type counter weight, 200 ... base weight, 200a ... center part, 200b ... side part, 210 ... mounting part, 220 ... convex part, 230 ... convex part, 300 ... split type loading weight, 310 ... split type center Loading weights, 312 ... convex parts, 314 ... concave parts, 360 ... split type side loading weights, 362 ... convex parts, 364 ... concave parts, 400 ... upper connecting mechanism, 410 ... mounting parts, 420 ... connecting plates, 420a ... through holes, 500 ... Lower connecting mechanism, 510 ... Mounting part, 520 ... Connecting link, 522 ... Fixed plate, 524 ... Swing plate, 524A ... Swing plate, 524B ... Swing plate, 526 ... Joint, 528 ... Retaining pin holder Part, 540 ... Connecting pin member, 542 ... Base, 544 ... Connecting pin, 546 ... Connecting pin stopper, 546a ... Pin part, 546b ... End, 548 ... Handle, 560 ... Retaining pin, 562 ... Ring, 580 ... Storing Plate, 580a ... through hole, 600 ... connecting mechanism, P1 ... vertical plane, P2 ... vertical plane.

Claims (2)

It is a split type counterweight attached to the swivel body of a crane car.
A base weight that can be attached to and detached from the swivel body,
It is composed of a split type loading weight that is placed on the base weight.
The split-type loading weight is composed of a plurality of split-type center loading weights and a plurality of split-type side loading weights mounted on the sides of the split-type center loading weight.
Each split-type side loading weight is configured to be stackable with other split-type side loading weights.
Each split side loading weight is shaped plane-symmetrically with respect to a vertical plane containing a straight line extending vertically through its center and a straight line extending longitudinally through its center.
Each split type side loading weight is provided with a connecting mechanism, and the connecting mechanism provided for each split type side loading weight can be connected to the connecting mechanism provided for other split type side loading weights stacked with each other. , The connecting mechanism provided on the two split side loading weights stacked on each other is connected to each other so that the two split side loading weights stacked on each other are fixed to each other. Has a storage structure capable of storing the connection mechanism in the storage position .
The connecting mechanism is composed of an upper connecting mechanism and a lower connecting mechanism, and the upper connecting mechanism provided on each split type side loading weight is provided on another split type side loading weight stacked on the upper connecting mechanism. The lower connecting mechanism provided on each split type side loading weight can be connected to the upper connecting mechanism provided on the other split side loading weights stacked under the lower connecting mechanism. The upper connecting mechanism and the lower connecting mechanism provided on the two split side loading weights stacked on each other fix the two split side loading weights stacked on each other to each other by being connected to each other. The lower connecting mechanism is provided with a connecting link having a swing plate, and the swing plate is retracted when the connection with the upper connecting mechanism is disengaged. A split counterweight that can be stored . The lower connecting mechanism has a connecting pin movably provided on the swing plate and a storage plate having a through hole into which the connecting pin can be inserted, and the storage plate has the connecting pin. The split counterweight according to claim 1 , which maintains the swing plate in the storage position when inserted into the through hole of the storage plate.

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