JP7376292B2 - Track running jib crane - Google Patents

Description

The present invention relates to a track traveling jib crane.

Generally, a track-running jib crane is installed at a dock where ships are built.

The above-mentioned track-running jib crane has a running body movable along a rail laid parallel to a quay, a columnar structure such as a post or a mast is erected from the running body, and the upper end of the columnar structure is erected from the running body. It has a structure in which a revolving body is rotatably disposed on the revolving body, and a jib is provided on the revolving body so that it can be raised and lowered.

Note that, for example, Patent Document 1 shows the general technical level related to the above-mentioned track traveling jib crane.

JP2017-95237A

By the way, the maximum wheel pressure of the above-mentioned track-running jib crane is determined by the distance (outreach) based on the center of rotation when the jib is laid down, and the maximum load of the track-running jib crane, including its own weight and the weight of the suspended load. It's decided.

Traditionally, when it becomes necessary to lengthen the outreach due to demands for transporting a suspended load further, the length of the rail on which the track-running jib crane is installed is extended to withstand the maximum wheel pressure. Over the years, efforts were being made to strengthen the foundation.

However, since it is very rare that a long outreach is required over the entire travel range of the track-travelling jib crane, reinforcing the foundation along the entire length of the rail would be wasteful and costly. , it could not be said that this was a favorable response.

The present invention has been made in view of the above-mentioned conventional problems, and aims to provide a track-travelling jib crane that can respond to requests for extension of outreach by locally reinforcing the foundation and can minimize increase in costs. It is something.

The present invention provides a running body that can freely run along rails laid in parallel;
a columnar structure erected from the running body;
a rotating body rotatably disposed at the upper end of the columnar structure;
a jib provided on the revolving body so as to be able to rise and fall freely;
A track traveling jib crane comprising: a support mechanism that supports overturning moment in a plane intersecting the rail ,
The support mechanism includes a compression support disposed on one side of the traveling body in the rail span direction, and a tension support disposed on the other side of the traveling body in the rail span direction,
The compression support includes a jack installed on the ground, and a compression support bracket extending from one side of the traveling body in the rail span direction so as to engage with the jack,
The tension support device includes a tension support member having one end connected to the ground, and a tension support bracket extending from the other side in the rail span direction of the traveling body so as to connect the other end of the tension support member. It is something.

The compression support bracket is rotatably arranged between an expanded position in which it engages with the jack and a storage position in which it is folded toward the traveling body,
The tension support bracket may be rotatably arranged between an expanded position where the other end of the tension support member is connected and a storage position where it is folded toward the traveling body.

According to the track-travelling jib crane of the present invention, it is possible to respond to requests for extension of outreach by locally reinforcing the foundation, and an excellent effect can be achieved in that increases in costs can be minimized.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an enlarged front view of main parts of an embodiment of a track-traveling jib crane of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a plan view showing an embodiment of a track traveling jib crane of the present invention. 2 is a view taken along arrow III-III in FIG. 1. FIG. 2 is a view taken along the line IV-IV in FIG. 1. FIG. FIG. 1 is an overall schematic diagram showing an example of a track-running jib crane.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

1 to 4 show embodiments of the track traveling jib crane of the present invention.

First, a description will be given of a track running jib crane to which the present invention is applied. As shown in FIG. ing.

The traveling body 10 includes a portal frame 11, an upper equalizer beam 12, an intermediate equalizer beam 13, a lower equalizer beam 14, and traveling wheels 15.

The gate-shaped pedestal 11 is a structure disposed in a gate shape above the rails 50 laid in parallel with the rail span S.

The upper equalizer beam 12 is swingably disposed on the bottom side of the portal frame 11, with its intermediate portion supported by a rocker pin 12a extending in a horizontal direction perpendicular to the traveling direction. The intermediate equalizer beam 13 is swingably disposed at one end of the upper equalizer beam 12 in the traveling direction with the intermediate portion supported by a rocker pin 13a extending in a horizontal direction perpendicular to the traveling direction. The lower equalizer beam 14 is swingably disposed at both ends of the intermediate equalizer beam 13 in the running direction, with an intermediate portion supported by rocker pins 14a extending in a horizontal direction perpendicular to the running direction. In the example shown in FIG. 5, a lower equalizer beam 14 is directly provided at the other end of the upper equalizer beam 12 in the running direction without intervening the intermediate equalizer beam 13 so as to be swingable by a rocker pin 14a. ing.

The running wheels 15 are disposed at both ends of the lower equalizer beam 14 in the running direction so as to be able to roll freely along the rails 50.

The columnar structure 20 is a post having a circular cross section or a mast having a truss structure having a rectangular cross section, and is erected from the portal frame 11 of the traveling body 10.

The rotating body 30 is rotatably disposed at the upper end of the columnar structure 20.

The jib 40 is provided on the rotating body 30 so as to be able to rise and fall freely.

As shown in FIGS. 1 to 4, this embodiment is characterized in that it includes a support mechanism 60 that supports the overturning moment in a plane intersecting the rail 50.

The support mechanism 60 includes a compression support 70 and a tension support 80.

The compression support 70 is disposed on one side of the traveling body 10 in the rail span S direction, as shown in FIGS. 1, 2, and 3. Incidentally, one side of the traveling body 10 in the rail span S direction is the side that lengthens the outreach. The compression support device 70 includes a jack 71 installed on the ground, and a compression support bracket 72 extending from one side of the traveling body 10 in the rail span S direction so as to engage with the jack 71. The jack 71 is installed on a support pedestal 71a erected from the ground, and the foundation of the portion on which the support pedestal 71a is erected is reinforced. As shown in FIG. 2, the compression support bracket 72 is rotatably arranged by a hinge 72a between an expanded position X1 where it engages with the jack 71 and a storage position Y1 where it is folded toward the traveling body 10. ing. A lock bracket 72b is provided protruding from the side surface of the portal frame 11, and a groove 72c that engages with the lock bracket 72b is formed in the compression support bracket 72. The compression support bracket 72 is fixed by inserting the lock pin 72d so as to penetrate from the compression support bracket 72 into the lock bracket 72b with the groove 72c engaged with the lock bracket 72b at the deployed position X1. It has become so. However, if the compression support bracket 72 does not get in the way during normal operation, the compression support bracket 72 may not be rotatable but may be fixed at the deployed position X1 at all times. Furthermore, the jack 71 may be installed on the traveling body 10 side instead of being installed on the ground side.

The tension support 80 is disposed on the other side of the traveling body 10 in the rail span S direction, as shown in FIGS. 1, 2, and 4. The tension support 80 includes a tension support member 81 whose one end is connected to the ground, and a tension support which extends from the other side in the rail span S direction of the traveling body 10 so that the other end of the tension support member 81 is connected. A bracket 82 is provided. Note that the foundation of the portion to which the tension support member 81 is connected is reinforced. As shown in FIG. 2, the tension support bracket 82 is pivoted by a hinge 82a between an unfolded position X2 where the other end of the tension support member 81 is connected and a storage position Y2 where it is folded toward the traveling body 10. It is freely arranged. A lock bracket 82b is protruded from the side surface of the portal frame 11, and a groove 82c is formed in the tension support bracket 82 to engage with the lock bracket 82b. The tension support bracket 82 is fixed by inserting the lock pin 82d through the tension support bracket 82 into the lock bracket 82b with the groove 82c engaged with the lock bracket 82b in the deployed position X2. It has become so. However, the tension support bracket 82 may not be rotatable but may be fixed at the deployed position X2 at all times if it does not get in the way during normal operation.

In this embodiment, although not shown, a traveling position detector of the traveling body 10, a load detector of the jack 71, a load detector of the tension support member 81, a luffing angle detector of the jib 40, and an overturning moment are provided. Equipped with detectors and various limit switches, when the detection value of each detector exceeds the set value or the limit switch is activated, an alarm will sound or the operation will be forcibly stopped. things are being done.

Next, the operation of the above embodiment will be explained.

During operation of the track traveling jib crane, when it is necessary to extend the outreach, the compression support 70 and the tension support 80 of the support mechanism 60 are set on the traveling body 10.

The compression support 70 is disposed on one side of the traveling body 10 in the rail span S direction (the side that lengthens the outreach). More specifically, the jack 71 of the compression support 70 is installed on a support pedestal 71a erected from the ground. As shown in FIG. 2, the compression support bracket 72 of the compression support tool 70 is extended from a storage position Y1 where it is folded toward the traveling body 10 to an unfolded position X1 where it engages with the jack 71. The compression support bracket 72 is fixed by inserting the lock pin 72d so as to penetrate from the compression support bracket 72 into the lock bracket 72b with the groove 72c engaged with the lock bracket 72b at the deployed position X1. .

On the other hand, the tension support 80 is disposed on the other side of the traveling body 10 in the rail span S direction. More specifically, as shown in FIG. 2, the tension support bracket 82 of the tension support member 80 is extended from the storage position Y2, where it is folded toward the traveling body 10, to the unfolded position X2. The tension support bracket 82 is fixed by inserting the lock pin 82d so as to penetrate from the tension support bracket 82 into the lock bracket 82b with the groove 82c engaged with the lock bracket 82b in the deployed position X2, The other end of the tension support member 81 is connected.

As a result, when performing work with a long outreach, the overturning moment acting on the portal frame 11 of the traveling body 10 due to the load suspended from the tip of the jib 40 is reduced by the compression support bracket 72 of the compression support 70. It is transmitted from the tension support bracket 82 of the tension support device 80 to the tension support member 81 and supported as a tensile load.

Here, the foundation of the part where the support pedestal 71a of the jack 71 is erected is reinforced, and the foundation of the part to which the tension support member 81 is connected is reinforced, so there is no problem in supporting the compressive load and the tensile load. will not occur.

As a result, even if it becomes necessary to lengthen the outreach due to a request to carry a suspended load further, there is no need to strengthen the foundation over the entire length of the rail 50, resulting in less waste and lower costs. This is a preferable solution as it does not become too large.

Further, during normal operation when there is no need to lengthen the outreach, the compression support bracket 72 is folded from the deployed position X1 shown by the solid line in FIG. 2 to the storage position Y1 shown by the phantom line, and the tension support bracket 82 is folded. , if the rail 50 is folded from the expanded position X2 shown by the solid line to the storage position Y2 shown by the imaginary line in FIG. Nor.

In this way, outreach extension requests can be met with localized base reinforcement, minimizing cost increases.

In the case of this embodiment, the support mechanism 60 includes a compression support 70 disposed on one side of the traveling body 10 in the rail span S direction, and a compression support 70 disposed on the other side of the traveling body 10 in the rail span S direction. A tension support 80 is provided. With this configuration, the overturning moment acting on the portal frame 11 of the traveling body 10 due to the hanging load suspended from the tip of the jib 40 can be stably supported by the compression support 70, and the tension It can be stably supported by the support tool 80.

Further, the compression support tool 70 includes a jack 71 installed on the ground, and a compression support bracket 72 extending from one side of the traveling body 10 in the rail span S direction so as to engage with the jack 71. The tension support 80 includes a tension support member 81 whose one end is connected to the ground, and a tension support bracket which extends from the other side in the rail span S direction of the traveling body 10 so that the other end of the tension support member 81 is connected. 82. With this configuration, reliability in supporting compressive loads and tensile loads can be increased simply by reinforcing the foundation of the part where the jack 71 is installed and the foundation of the part to which the tension support member 81 is connected. I can do it.

Furthermore, the compression support bracket 72 is rotatably arranged between an expanded position X1 where it engages with the jack 71 and a storage position Y1 where it is folded toward the traveling body 10. is rotatably arranged between an unfolded position X2 where the other end of the tension support member 81 is connected and a stored position Y2 where it is folded toward the traveling body 10 side. With this configuration, during normal operation when there is no need to lengthen the outreach, the compression support bracket 72 can be folded from the deployed position X1 to the stored position Y1, and the tension support bracket 82 can be folded from the deployed position X2 to the stored position. It can be folded to Y2, which is effective in increasing workability.

It should be noted that the track traveling jib crane of the present invention is not limited to the above-described embodiments, and it goes without saying that various changes can be made without departing from the gist of the present invention.

10 Traveling body 11 Portal frame 12 Upper equalizer beam 12a Rocker pin 13 Middle equalizer beam 13a Rocker pin 14 Lower equalizer beam 14a Rocker pin 15 Traveling wheel 20 Column structure 30 Swivel body 40 Jib 50 Rail 60 Support mechanism 70 Compression support 71 Jack 71a Support frame 72 Compression support bracket 72a Hinge 72b Lock bracket 72c Groove 72d Lock pin 80 Tension support 81 Tension support member 82 Tension support bracket 82a Hinge 82b Lock bracket 82c Groove 82d Lock pin S Rail span X1 Deployment position Y1 Storage position X2 Deployed position Y2 Stored position

Claims (2)

A running body that can freely run along parallel rails,
a columnar structure erected from the running body;
a rotating body rotatably disposed at the upper end of the columnar structure;
a jib provided on the revolving body so as to be able to rise and fall freely;
A track traveling jib crane comprising: a support mechanism that supports overturning moment in a plane intersecting the rail ,
The support mechanism includes a compression support disposed on one side of the traveling body in the rail span direction, and a tension support disposed on the other side of the traveling body in the rail span direction,
The compression support includes a jack installed on the ground, and a compression support bracket extending from one side of the traveling body in the rail span direction so as to engage with the jack,
The tension support device includes a tension support member having one end connected to the ground, and a tension support bracket extending from the other side in the rail span direction of the traveling body so as to connect the other end of the tension support member. Track running jib crane . The compression support bracket is rotatably arranged between an expanded position in which it engages with the jack and a storage position in which it is folded toward the traveling body,
The track-running jib crane according to claim 1 , wherein the tension support bracket is rotatably arranged between a deployed position where the other end of the tension support member is connected and a storage position where it is folded toward the traveling body. .

Images