JP6088868B2 - Tower crane - Google Patents

Description

  The present invention relates to a tower crane. In particular, the present invention relates to a tower crane that is convenient to stand and use at a work site.

Tower cranes are used for various purposes.
A tower crane lifts an object and moves up and down or horizontally.

Sometimes you want to move an item at the work site.
The inventor tried to devise a tower crane that is easy to transport and easy to use at the work site.

  The present invention has been devised in view of the problems described above, and provides a tower crane that has a simple structure and is easy to transport and use.

  To achieve the above object, a tower crane according to the present invention, comprising a foundation chassis, a foundation structure having a foundation chassis and a swiveling chassis supported so as to be swingable about a vertical axis, and one end portion thereof A lower strut structure that is a long structure that is swingably connected to the swivel chassis about the first horizontal axis, and one end side that is the other of the lower strut structure. The upper strut structure, which is a long structure supported on the end side, and the other end side are swung around the fourth horizontal axis to the other end side of the lower strut structure. An intermediate link having a lower intermediate link that is movably connected, and one end side is pivotally connected to the swivel chassis around a sixth horizontal axis, and the other end side is the lower side A rear cover connected to one end of the intermediate link so as to be swingable about the third horizontal axis. A crane boom that supports the hoist and the hoist so that the hoist can be swung around the seventh horizontal axis on the other end side of the upper column structure, and supported on the hoist. A crane mechanism having one end, and a king post, which is a long member that is swingably connected at one end to the other end side of the upper column structure, and one end connected to one end side of the intermediate link A boom support mechanism having a first brace that is a wire connected to the other end of the king post, and a long member connected to the swing chassis so as to be swingable around a tenth horizontal axis. A wire support mechanism having a wire support member, wherein the first horizontal axis, the third horizontal axis, the fourth horizontal axis, the sixth horizontal axis, and the tenth horizontal axis are parallel to each other. The posture can be changed between the folded posture and the standing posture, The folding posture is such that the lower strut structure and the upper strut structure are folded with their longitudinal directions being substantially horizontal, and the wire support member is parallel to the longitudinal direction along the upper strut structure. The standing posture is a posture in which the lower column structure and the upper column structure are substantially perpendicular to each other in the longitudinal direction and the wire support member is arranged in parallel in the longitudinal direction along the back link.

According to the above-described configuration of the present invention, the foundation structure includes the foundation chassis and the swivel chassis that is supported by the foundation chassis so as to be swingable around a vertical axis. The lower column structure is a long structure in which one end side is swingably connected to the swivel chassis around the first horizontal axis. The upper strut structure is a long structure in which one end side is supported on the other end side of the lower strut structure. The intermediate link is connected to the lower intermediate link so as to be swingable around the fourth horizontal axis on the other end side to the other end side of the lower column structure. A back link is connected to the swivel chassis on one end side so as to be swingable around a sixth horizontal axis, and the other end side is connected to one end side of the lower intermediate link. It is pivotably connected around a third horizontal axis. A crane boom is supported by the crane mechanism so that the hoist and one end side can swing around the seventh horizontal axis on the other end side of the upper strut structure, and the hoist is supported so that the hoist can run. And have. The boom support mechanism has one end connected to the one end side of the intermediate link and one end of the intermediate link, and a king post that is a long member that is swingably connected to the other end side of the upper column structure. A first brace that is a wire that is connected to the other end of the king post at the other end (and a second brace that is connected at one end to the other end of the king post and connected at the other end to the crane boom). The wire support member of the wire support mechanism is a long member that is swingably coupled to the swivel chassis about a tenth horizontal axis. The first horizontal axis, the third horizontal axis, the fourth horizontal axis, the sixth horizontal axis, and the tenth horizontal axis are parallel to each other. The posture can be changed between the folded posture and the standing posture. The folding posture is such that the lower column structure and the upper column structure are folded with their longitudinal directions being substantially horizontal, and the wire support member is parallel to the longitudinal direction along the upper column structure. is there. The standing posture is a posture in which the lower column structure and the upper column structure are substantially perpendicular to each other in the longitudinal direction and the wire support member is disposed in parallel in the longitudinal direction along the back link.
As a result, the height of the tower crane is lowered in the folded posture and the wire support member supports the first bracing, and the first bracing supports the king post in the standing posture, and the upper column structure and the lower column structure A tower-like crane support can be made.

  Below, the tower type crane which concerns on embodiment of this invention is demonstrated. The present invention includes any of the embodiments described below, or a combination of two or more of them.

In the tower crane according to the embodiment of the present invention, the wire support mechanism includes the wire support member and a connecting rod that swings the wire support member in conjunction with the swing of the lower support structure or the back link. .
With the configuration of the above embodiment, the connecting rod of the wire support mechanism swings the wire support member in conjunction with the swing of the lower support structure or the back link.
As a result, the wire support member is swung by the connecting rod, and the posture changes between the standing posture and the folded posture.

In the tower crane according to the embodiment of the present invention, one end side of the connecting rod is connected to the back link, and the other end side is connected to the wire support member.
With the configuration of the above embodiment, the connecting rod is connected to the back link on one end side and to the wire support member on the other end side.
As a result, the wire support member swings in conjunction with the swing of the back link, and the posture changes between the standing posture and the folded posture.

The tower crane according to an embodiment of the present invention is a long structure in which the lower support structure forms a lower contact surface that is a surface on the other end side, and the upper support structure is the In order to support the one end side on the other end side of the lower column structure, the one end side is placed on the second horizontal axis to the other end side of the lower column structure. An elongate structure that forms an upper abutment surface that is a surface on one end side and is swingably coupled around the lower end of the lower intermediate link and the other end. One upper end of the lower intermediate link and the upper intermediate link having an upper intermediate link pivotably connected around the fifth horizontal axis on one end side of the upper support structure And the folding posture is the lower column structure and the upper column. The structure is folded in such a way that each longitudinal direction is substantially horizontal, and the wire support member has a posture in which the longitudinal direction is arranged along the upper support structure, and the standing posture is the lower support structure and the The upper support structure is in contact with the lower contact surface facing upward and the upper contact surface facing downward with the longitudinal direction thereof being substantially vertical, and the wire support member extends along the back link. This is a posture in which the longitudinal directions are arranged in parallel.
By the structure of said embodiment, the said lower support | pillar structure is a elongate structure which forms the lower contact surface which is a surface at the side of the other edge part. One end side to the other end side of the lower column structure so that the upper column structure is supported on one end side to the other end side of the lower column structure Is an elongate structure that is pivotably connected around the second horizontal axis and forms an upper abutment surface that is a surface on one end side. The intermediate link includes the lower intermediate link and an upper intermediate link that is swingably connected around the fifth horizontal axis to the one end side of the upper column structure. The lower intermediate link and the upper intermediate link are connected to each other so as to be swingable around a third horizontal axis. The folding posture is such that the lower column structure and the upper column structure are folded with their longitudinal directions being substantially horizontal, and the wire support member is parallel to the longitudinal direction along the upper column structure. is there. The standing posture is such that the lower strut structure and the upper strut structure are substantially perpendicular to each other and the lower abutment surface facing upward and the upper abutment surface facing downward contact each other. The wire support member is in a posture in which longitudinal directions are arranged in parallel along the back link.
As a result, the height of the tower crane is lowered in the folded posture, the wire support member supports the first bracing, and the first bracing supports the king post in the standing posture, and the upper column structure and the lower column structure A tower-like crane support can be made.

As described above, the tower crane according to the present invention has the following effects due to its configuration.
The upper strut structure is supported on one end side on the other side of the lower strut structure, the back link is swingably supported on one end side, and the lower intermediate link is The other end side of the lower strut structure is connected to the other side of the back link, the other end of the upper strut structure supports one end of the crane boom, and the first bracing is the intermediate link and the upper strut structure. The wire support member is swingably supported by the swivel chassis, and the lower support structure and the upper support structure are substantially horizontal in the longitudinal direction. And a folding posture in which the wire support member is folded in parallel along the upper column structure, and the lower column structure and the upper column structure are substantially perpendicular to each other. The wire support member is Since the posture is changed between the standing posture with the longitudinal direction parallel along the back link, the height of the tower crane is lowered in the folded posture, and the wire support member supports the first bracing, and the standing posture Thus, the first bracing supports the king post and connects the upper strut structure and the lower strut structure to form a tower-like crane strut.
In addition, since the connecting rod of the wire support mechanism swings the wire supporting member in conjunction with the swing of the back link, the wire supporting member swings by the connecting rod, and the posture becomes the standing posture. Transition between folding postures.
In addition, since the connecting rod has one end connected to the back link and the other end connected to the wire support member, the wire is linked to the swing of the back link. The support member swings and the posture changes between the standing posture and the folded posture.
The upper support structure is swingably connected at one end to the other end of the lower support structure, and the lower support structure supports the end of the support swingably. The back link is swingably supported on one end side, and the lower intermediate link connects the other end side of the lower column structure and the other side of the back link, The upper intermediate link connects the other side of the upper column structure and the other side of the rear link, and the lower column structure and the upper column structure are folded with their respective longitudinal directions being substantially horizontal. The posture is changed between the folded posture and the standing posture where the lower contact surface and the upper contact surface are in contact with each other so that the longitudinal direction of the lower support structure and the upper support structure are substantially perpendicular to each other. The height of the tower crane is lowered in the folded position. Wire supporting member supporting the first strut, can to make the tower-like crane strut said first strut is supporting the king post in a standing posture been chosen and the lower bearing structure with the upper bearing structure.
Therefore, it is possible to provide a tower crane that has a simple structure and is easy to transport and use.

It is a side view of the standing state of the tower type crane concerning the embodiment of the present invention. It is a top view of the standing state of the tower type crane which concerns on embodiment of this invention. It is a perspective view of the standing state of the tower type crane concerning the embodiment of the present invention. It is an enlarged view of the standing state of the tower type crane concerning the embodiment of the present invention. It is a side view of the folded state of the tower type crane which concerns on embodiment of this invention. It is a top view of the folded state of the tower type crane which concerns on embodiment of this invention. It is a perspective view of the folded state of the tower type crane which concerns on embodiment of this invention. It is an enlarged view of the folding state of the tower type crane which concerns on embodiment of this invention. It is a side view of a tower type crane with other support structure.

Hereinafter, a tower crane according to an embodiment for carrying out the present invention will be described with reference to the drawings.
FIG. 1 is a side view of a tower crane in a standing state according to an embodiment of the present invention. FIG. 2 is a plan view of a tower crane in a standing state according to the embodiment of the present invention. FIG. 3 is a perspective view of the tower crane according to the embodiment of the present invention in an upright state. FIG. 4 is an enlarged view of the tower crane according to the embodiment of the present invention in a standing state. FIG. 5 is a side view of the tower crane according to the embodiment of the present invention in a folded state. FIG. 6 is a plan view of the tower crane according to the embodiment of the present invention in a folded state. FIG. 7 is a perspective view of the tower crane according to the embodiment of the present invention in a folded state. FIG. 8 is an enlarged view of a folded state of the tower crane according to the embodiment of the present invention.
In FIG. 8, the basic structure is omitted for easy understanding.

The tower crane 100 is a device that lifts an article and moves it horizontally.
The tower crane 100 may be mounted on the vehicle 200.
For example, the tower crane 100 is mounted on the vehicle 200 for transportation. The tower crane 100 changes the posture between a standing posture and a folded posture.

The tower crane 100 includes a foundation structure 10, a lower support structure 20, an upper support structure 30, an intermediate link 40, a back link 50, and a wire type mechanism 90.
The tower crane 100 includes a foundation structure 10, a lower column structure 20, an upper column structure 30, an intermediate link 40, a back link 50, and a folding / standing mechanism 60.
The tower crane 100 may be composed of the foundation structure 10, the lower support structure 20, the upper support structure 30, the intermediate link 40, the rear link 50, the folding / standing mechanism 60, the crane mechanism 70, and the boom support mechanism 80. Good.

The foundation structure 10 is a structure that is the foundation of the tower crane 100.
The foundation structure 10 includes a foundation chassis 11 and a turning chassis 12.
The base chassis 11 may be a chassis that supports the revolving chassis 12.
The base chassis 11 may include an outrigger 11a, a frame 11b, and a stopper 11c.
The swivel chassis 12 can swing around the vertical axis Z.
The turning chassis 12 may be supported by the base chassis 11 so as to be swingable about a vertical axis.

The lower support structure 20 is a long structure that is connected to the foundation structure 10 on one end side so as to be swingable around the first horizontal axis P1.
The lower column structure 20 is connected to the foundation structure 10 so that one end thereof is swingable around the first horizontal axis P1, and a lower contact surface D1 as a surface is provided on the other end side. It may be a long structure to be formed.
The lower column structure 20 is connected to the revolving chassis 12 on one end side so as to be swingable around the first horizontal axis P1, and has a lower contact surface D1 as a surface on the other end side. It may be a long structure to be formed.
When the posture is the standing posture, the lower column structure 20 is connected to the swivel chassis 12 so that the lower end side is swingable around the first horizontal axis P1, and the upper end side is located on the upper end side. A lower contact surface D1 that is a surface facing upward is formed .

The upper column structure 30 is a long structure whose one end side is supported on the other end side of the lower column structure 20. The upper column structure 30 is a part of the lower column structure 20. The long end is connected to the other end side so that the one end side is swingable around the second horizontal axis P2 and forms an upper contact surface D2 which is a surface on the one end side. The structure may be used.
When the posture is the standing posture, the upper column structure 30 is connected to the upper end side of the lower column structure 20 so as to be swingable around the second horizontal axis P2. Then, an upper contact surface D2 which is a surface facing downward is formed on the lower end side .

The intermediate link 40 is a link mechanism that links the postures of the lower support structure 20 and the upper support structure 30.
The intermediate link 40 may be configured with a lower intermediate link 41.
The lower intermediate link 41 is connected to the other end side of the lower column structure 20 so as to be swingable around the fourth horizontal axis P4 on the other end side.
The lower support structure 20 may directly support the upper support structure 30.
The lower column structure 20 may support the upper column structure rod 30 via the lower intermediate link 41.

The intermediate link 40 may be composed of a lower intermediate link 41 and an upper intermediate link 42.
The lower intermediate link 41 and the upper intermediate link 42 are connected to each other so as to be swingable around the third horizontal axis P3.
The other end portion side of the lower intermediate link 41 is connected to the other end portion side of the lower column structure 20 so as to be swingable around the fourth horizontal axis.
The other end side of the upper intermediate link 42 is connected to the one end side of the upper column structure 30 so as to be swingable around the fifth horizontal axis P5.
When the posture is the standing posture, the upper intermediate link 42 is positioned above the lower intermediate link 41.

The back link 50 is connected to the foundation structure 10 so that one end thereof is swingable around the sixth horizontal axis P6, and the other end is connected to the intermediate link 40 at the third horizontal axis P3. It is connected so that it can swing freely.
The rear link 50 is connected at one end to the swivel chassis 12 so as to be swingable around the sixth horizontal axis P6, and the other end is connected to the intermediate link 40 at the third horizontal axis P3. You may be connected so that rocking is possible.
When the posture is the standing posture, the rear link 50 is connected to the swing chassis 12 so as to be swingable around the sixth horizontal axis P6 on the lower end side, and the intermediate link 40 on the upper end side. Are pivotably connected around the third horizontal axis P3.

  The first horizontal axis P1, the second horizontal axis P2, the third horizontal axis P3, the fourth horizontal axis P4, and the fifth horizontal axis P5 are parallel to each other.

The folding posture is a posture in which the lower column structure 20 and the upper column structure 30 are folded with their longitudinal directions substantially horizontal.
The standing posture is such that the lower support structure 20 and the upper support structure 30 are in contact with the lower contact surface D1 facing upward and the upper contact surface D2 facing downward with their longitudinal directions substantially vertical. It is.
In this manner, in the standing state, the vertical load passes through the portion where the lower contact surface D1 and the upper contact surface D2 are in contact, and is transmitted from the upper support structure 30 to the lower support structure 20.

The folding / standing mechanism 60 is a mechanism for changing the posture of the tower crane between the folding posture and the standing posture.
The folding / standing mechanism 60 may include an actuator that outputs the tower crane to change the posture between the folding posture and the standing posture.
The folding / standing mechanism 60 may include a linear actuator that outputs the tower crane to change the posture between the folding posture and the standing posture.
The folding / standing mechanism 60 may have a hydraulic cylinder that extends and contracts the rod in order to change the posture of the tower crane between the folding posture and the standing posture.

The actuator outputs in one direction, and the posture changes from the folded posture to the standing posture.
The actuator outputs in the other direction and transitions from the standing posture to the folded posture.
The linear motion actuator outputs in one direction, and the posture changes from the folded posture to the standing posture.
The linear motion actuator outputs in the other direction and transitions from the standing posture to the folded posture.
When the linear actuator extends the rod, the posture changes from the folded posture to the standing posture.
When the linear actuator retracts the rod, the posture changes from the standing posture to the folded posture.
When the hydraulic cylinder extends the rod, the posture changes from the folded posture to the standing posture.
When the hydraulic cylinder retracts the rod, the posture changes from the standing posture to the folded posture.
When the posture is a standing posture, the hydraulic oil may be confined to the head side of the hydraulic cylinder.
When the posture is a standing posture, the head side of the hydraulic cylinder may be electrically connected to the accumulator.
When the posture is the folded posture, the lower support structure 20 may contact the stopper 11c.
FIG. 7 shows a state where the lower support structure 20 is in contact with the stopper 11c when the posture is the folded posture.

When the posture is the standing posture, the force that the linear motion actuator outputs so as to raise the lower support structure 20 passes through the lower support structure 20 and the intermediate link 40 to the lower contact surface D1 and the upper contact surface D2. It may act in the direction of contact.
When the posture is an upright posture, the force acting in the direction of extending the rod of the hydraulic cylinder 61 causes the lower contact surface D1 and the upper contact surface D2 to contact with each other through the lower support structure 20 and the intermediate link 40. It may act.

The crane mechanism 70 is a mechanism that is supported by the upper column structure 30.
The crane mechanism 70 includes a hoist 71 and a crane boom 72.
The crane mechanism 70 includes a hoist 71, a crane boom 72, and a boom coupling mechanism 75.
The crane boom 72 supports the hoist 71 so that it can run freely.
The crane boom 72 may be composed of a first crane boom 72a, a second crane boom 72b, and a third crane boom 72c.
The first crane boom 72a and the second crane boom 72b may be swingably connected around the eighth horizontal axis P8.
The second crane boom 72b and the third crane boom 72c may be coupled in a swinging manner around the ninth horizontal axis P9.
The boom connection mechanism 75 is a mechanism for connecting the first crane boom 72a, the second crane boom 72b, and the third crane boom 72c.
The boom connection mechanism 75 includes a link mechanism and a direct acting actuator.
The direct acting actuator may be a hydraulic cylinder.
The mechanical relative relationship among the first crane boom 72a, the second crane boom 72b, and the third crane boom 72c changes when the posture is changed between the standing posture and the folded posture by the action of the boom coupling mechanism 75. To do.

  First horizontal axis P1, second horizontal axis P2, third horizontal axis P3, fourth horizontal axis P4, fifth horizontal axis P5, sixth horizontal axis P6, seventh horizontal axis P7 and The eighth horizontal axis P8 and the ninth horizontal axis P9 may be parallel.

The upper support structure 30 may support the base of the crane boom 72.
The upper support structure 30 may support the base of the crane boom 72 on the other end side.
When the posture is the standing posture, the upper column structure 30 may support the base of the first crane boom 72a on the upper end side.

The boom connection mechanism 75 is a link mechanism that connects the first crane boom 72a, the second crane boom 72b, and the third crane boom 72c.
When the posture is the folded posture, the first crane boom 72a, the second crane boom 72b, and the third crane boom 72c are arranged so that the longitudinal direction of the first crane boom 72a and the longitudinal direction of the third crane boom 72c are substantially parallel. And are folded.
When the posture is an upright posture, the first crane boom 72a, the second crane boom 72b, and the third crane boom 72c may be connected so that the longitudinal directions thereof are horizontal and in series.

The boom support mechanism 80 is a mechanism that supports the crane mechanism 70.
The boom support mechanism 80 includes a king post 81, a first brace 82, and a second brace 83.
The king post 81 is a long member having one end pivotably coupled to the other end side of the upper column structure 30.
The first bracing 82 is a longitudinal member that connects one end side to the intermediate link 40 and connects the other end side to the other end of the king post 81.
When the posture is the standing posture, the first bracing 82 connects the lower end side to the intermediate link 40 and connects the upper end side to the other end of the king post 81.
For example, the first bracing 82 is a cable that connects one end side to the intermediate link 40 and connects the other end side to the other end of the king post 81.
The second bracing 83 is a longitudinal member that connects one end to the other end of the king post 81 and connects the other end to the crane boom.
The second bracing 83 is a longitudinal member that connects one end side to the other end of the king post 81 and connects the other end side to the other end side of the first crane boom 72a. May be.

The wire support mechanism 90 is a mechanism that supports the first bracing 82.
The wire support mechanism 90 includes a wire support member 91.
The wire support member 91 is a long member that is swingably coupled to the revolving chassis 12 about the tenth horizontal axis P10.

The wire support mechanism 90 may be composed of a wire support member 91 and a connecting rod 92.
The wire support member 91 is a long member that is swingably coupled to the revolving chassis 12 about the tenth horizontal axis P10.
The connecting rod 92 is a member that swings the wire support member in conjunction with the swing of the lower column structure or the back link.
The connecting rod 92 may be connected to the back link on one end side and connected to the wire support member on the other end side.
The connecting rod 92 is connected at one end to the back link so as to be swingable around the eleventh horizontal axis P11, and the other end is connected to the wire support member at the twelfth horizontal axis P12. It may be connected so as to be swingable around.

The first horizontal axis, the third horizontal axis P3, the fourth horizontal axis P4, the sixth horizontal axis P6, and the tenth horizontal axis P10 are parallel to each other.
The first horizontal axis P1 to the twelfth horizontal axis P12 may be parallel.

The folding posture is such that the lower column structure 20 and the upper column structure 30 are folded with their longitudinal directions being substantially horizontal, and the wire support member 91 is parallel to the longitudinal direction along the upper column structure 30. It is.
The standing posture is a posture in which the lower column structure 20 and the upper column structure 30 have their respective longitudinal directions substantially vertical, and the wire support member 91 has the longitudinal direction in parallel along the back link 50.

When the posture is an upright posture, there is a direction where the side where the tip of the crane boom is seen from the support point and a contact portion which is a contact point between the lower contact surface and the upper contact surface from the third horizontal axis. The direction seen from the side may match.
In this way, when the hoist 71 suspends the load with the posture in the standing posture, the overturning moment acting on the upper support structure 30 due to the weight of the load is applied to the lower contact surface D1 and the upper contact surface D2. It acts in the direction of increasing the acting abutting force, and acts to stabilize the posture of the lower support structure 20 and the upper support structure 30.

The operation of the tower crane according to the embodiment of the present invention will be described below.
A case where the posture is changed from the folded posture to the standing posture will be described.

1, 2, 3, and 4 show a tower crane in which the posture is an upright posture.
5, 6, 7, and 8 show a tower crane having a folded posture.
The lower column structure 20 and the upper column structure 30 are folded substantially horizontally in the longitudinal direction.
The wire support member 91 is arranged in parallel with the upper support structure 30 with the longitudinal direction being substantially horizontal.
The first crane boom 72a and the third crane boom 72c are folded with the longitudinal direction being substantially horizontal.
The outrigger 11a is lifted up.
The hydraulic cylinder 61 is in a state where the rod is contracted.
When the hydraulic cylinder 61 extends the rod, the lower column structure 20 swings around the first horizontal axis P1 and lifts the other end side of the lower column structure 20.
The swivel chassis 12, the lower column structure 20, the lower intermediate link 41, and the rear link 50 are connected by the first horizontal axis P1, the fourth horizontal axis P4, the third horizontal axis P3, and the sixth horizontal axis P6. Thus, a so-called four-bar link is formed.
Further, the upper support structure 30 and the upper intermediate link 42 are connected by the second horizontal axis P2, the fifth horizontal axis P5, and the third horizontal axis P3 to form a so-called truss structure.
As the longitudinal direction of the lower support structure 20 is changed from horizontal to vertical, the longitudinal direction of the back link 50 is changed from horizontal to vertical, the lower intermediate link 41 is turned, and the third horizontal axis P3 is the fourth. It changes to a position higher than the horizontal axis.
As the third horizontal axis P3 changes to a position higher than the fourth horizontal axis, the fifth horizontal axis P5 becomes higher than the second horizontal axis P2, and the upper column structure 30 moves in the longitudinal direction. Change from horizontal to vertical.
When the lower contact surface D1 and the upper contact surface D2 contact each other, the lower column structure 20 and the upper column structure 30 are substantially perpendicular to each other, and the lower column structure 20 and the upper column structure 30 are Are aligned in series.
The wire support member 91 extends in the longitudinal direction in the vertical direction and is arranged in parallel with the back link 50.
The hydraulic oil is confined to the head side of the hydraulic cylinder 61.
The boom connecting mechanism 75 is operated to deploy the crane boom 72, and the first crane boom 72a, the second crane boom 72b, and the third crane boom 72c are arranged in series with their longitudinal directions being substantially horizontal.

The hoist 71 lifts the load, is guided by the crane boom, and moves.
The turning chassis 12 turns.
Wheel 71 hangs the load.

  When the posture is changed from the standing posture to the folded posture, the procedure is reversed in the case of changing the posture from the folded posture to the standing posture.

The tower crane according to the embodiment of the present invention has the following effects due to its configuration.
The upper column structure 30 is supported on one end side by the other side of the lower column structure 20, the back link 50 is supported swingably on one end side, and the lower intermediate link 41 is below The other end side of the column structure 20 is connected to the other side of the back link 50, the other end of the upper column structure 30 supports one end of the crane boom 73, and the first bracing 82 is connected to the intermediate link 40. The wire support member 91 is swingably supported by the swivel chassis 12 and the lower support structure 20 and the upper support structure 30 are connected to each other. Folding posture in which each longitudinal direction is folded substantially horizontally and the wire support member 91 is parallel to the longitudinal direction along the upper column structure 30, and the lower column structure 20 and the upper column structure 30 are each longitudinal. Make the direction almost vertical In addition, since the wire support member 91 changes its posture between the standing posture in which the longitudinal direction is parallel along the back link 50, the height of the tower crane is lowered in the folded posture, and the wire support member 91 is The first bracing 82 is supported, and the first bracing 82 supports the king post 81 in a standing posture, and the upper column structure 30 and the lower column structure 20 are connected to form a tower-like crane column.
Further, since the connecting rod 92 of the wire support mechanism 90 swings the wire support member 91 in conjunction with the swing of the back link 50, the wire support member 91 swings by the connecting rod 92, and the posture Transition between a standing posture and a folded posture.
Further, since the connecting rod 92 is connected to the back link 50 on one end side and connected to the wire support member 91 on the other end side, the wire is linked to the swinging of the back link 50. The support member 91 swings, and the posture changes between the standing posture and the folded posture.
Further, the upper column structure 30 is swingably connected at one end side to the other side of the lower column structure 20, and the lower column structure 20 supports the one end side so as to be swingable. The back link 50 is supported swingably on one end side, and the lower intermediate link 41 connects the other end side of the lower column structure 20 and the other side of the back link 50, The upper intermediate link 42 connects the other side of the upper column structure 30 and the other side of the rear link 50, and the lower column structure 20 and the upper column structure 30 are folded with their respective longitudinal directions being substantially horizontal. The posture is changed between the folded posture and the standing posture where the lower support surface D1 and the upper contact surface D2 are in contact with each other with the lower support structure 20 and the upper support structure 30 being substantially perpendicular to each other in the longitudinal direction. The height of the tower crane is lowered in the folded position. The wire support member 91 supports the first bracing 82, and the first bracing 82 supports the king post 81 in a standing posture to connect the upper column structure 30 and the lower column structure 20 to form a tower-like crane column. it can.
Further, the upper column structure 30 is swingably connected at one end side to the other side of the lower column structure 20, and the lower column structure 20 supports the one end side so as to be swingable. The back link 50 is supported swingably on one end side, and the lower intermediate link 41 connects the other end side of the lower column structure 20 and the other side of the back link 50, The upper intermediate link 42 connects the other side of the upper column structure 30 and the other side of the rear link, and the lower column structure 20 and the upper column structure 30 are folded with their respective longitudinal directions being substantially horizontal. The posture is changed between the folding posture and the standing posture in which the lower support structure 20 and the upper support structure 30 are substantially perpendicular to each other and the lower contact surface D1 and the upper contact surface D2 are in contact with each other. So that the height of the tower crane is lowered in the folded position, In standing posture, it is possible to make the tower-like crane strut been chosen the upper bearing structure 30 and the lower bearing structure 20.
Further, when the hydraulic cylinder 61 extends the rod, the folding posture is changed to the standing posture, the hydraulic oil is confined to the head side of the hydraulic cylinder 61, and when the hydraulic cylinder is contracted, the standing posture is changed to the folding posture to lower the support column. Since the structure 20 corresponds to the stopper 11c, the posture can be fixed to the standing posture or the folded posture by expansion and contraction of the rod of the hydraulic cylinder.
Further, when the posture is a standing posture, the force acting in the direction of extending the rod of the hydraulic cylinder 61 causes the lower contact surface D1 and the upper contact surface D2 to contact each other through the lower support structure 20 and the intermediate link 40. Since it works in the direction, the posture in the standing posture can be ensured.
Further, when the posture is a standing posture, the force output by the linear actuator acts in a direction in which the lower contact surface D1 and the upper contact surface D2 are brought into contact with each other through the lower support structure 20 and the intermediate link 40. As a result, the posture in a standing posture can be ensured.
Further, the upper support structure 30 supports the base of the crane boom, and when the posture is an upright posture, the lower abutment surface D1 from the direction seen from the base with the tip of the crane boom and the third horizontal axis P3. And the direction of looking at the side where the abutting portion is abutting with the upper abutting surface D2, the force due to the weight of the load suspended on the hoist 71 traveling on the crane boom 72 is applied. The standing posture is stabilized by acting on the contact surface.

The present invention is not limited to the embodiments described above, and various modifications can be made without departing from the scope of the invention.
Although this application was demonstrated with the example applied to the tower crane which has the support | pillar structure shown in FIG. 1 thru | or FIG. 8, it is not limited to this. For example, the present invention may be applied to a tower crane having a support structure shown in FIG.

D1 Lower contact surface D2 Upper contact surface P1 First horizontal axis P2 Second horizontal axis P3 Third horizontal axis P4 Fourth horizontal axis P5 Fifth horizontal axis P6 Sixth horizontal axis P7 Seventh horizontal Axis center P8 Eighth horizontal axis P9 Ninth horizontal axis P10 Tenth horizontal axis P11 Eleventh horizontal axis P12 Twelve horizontal axis Z Vertical axis 100 Tower crane 10 Base structure 11 Basic chassis 11a Outrigger 11b Frame 11c Stopper 12 Rotating chassis 20 Lower support structure 30 Upper support structure 40 Intermediate link 41 Lower intermediate link 42 Upper intermediate link 50 Rear link 60 Folding / standing mechanism 61 Hydraulic cylinder 70 Crane mechanism 71 Hoist 72 Klein boom 72a First One crane boom 72b Second crane boom 72c Third crane boom 75 Boom articulator 80 boom support mechanism 81 King post 82 first strut 83 second strut 90 wire support mechanism 91 wire support member 92 connecting rod 200 vehicle

Actual Kaihei 11-071093 Utility Kaihei 5-193890 Japanese Utility Model Publication No.5-221383

Claims (4)

A tower crane,
A foundation structure having a foundation chassis and a swivel chassis supported by the foundation chassis so as to be swingable about a vertical axis;
A lower support structure, which is a long structure that is pivotally connected to the swivel chassis around the first horizontal axis on one end side;
An upper strut structure that is a long structure supported on one end side on the other end side of the lower strut structure;
An intermediate link having a lower intermediate link connected to the other end side of the lower column structure so as to be swingable around a fourth horizontal axis, on the other end side;
The side of one of said pivoting chassis side end is connected swingably in a sixth horizontal axis around the other end portion on one side of the end portion of the lower intermediate link of the third horizontal axis A back link that is pivotably connected around,
A crane having a hoist and a crane boom for swinging around the seventh horizontal axis on the other end side of the upper column structure and supporting the hoist so that the hoist can run freely Mechanism,
One end is connected to the one end of the intermediate link and the other end is connected to the king post, which is a long member swingably connected to the other end of the upper column structure. A boom support mechanism having a first brace that is a wire connected to the other end of the post;
A wire support mechanism having a wire support member that is a long member that is swingably coupled to the swivel chassis about a tenth horizontal axis;
With
The first horizontal axis, the third horizontal axis, the fourth horizontal axis, the sixth horizontal axis, and the tenth horizontal axis are parallel,
The posture can be changed between the folded posture and the standing posture,
The folding posture is such that the lower column structure and the upper column structure are folded with their longitudinal directions being substantially horizontal, and the wire support member is parallel to the longitudinal direction along the upper column structure. Yes,
The standing posture is a posture in which the lower column structure and the upper column structure are substantially perpendicular to each other in the longitudinal direction and the wire support member is arranged in parallel in the longitudinal direction along the back link.
A tower crane characterized by that. The wire support mechanism includes the wire support member and a connecting rod that swings the wire support member in conjunction with the swing of the lower column structure or the back link.
The tower crane according to claim 1. The connecting rod is connected to the back link on one end side and connected to the wire support member on the other end side;
The tower crane according to claim 2. The lower strut structure is a long structure that forms a lower contact surface that is a surface on the other end side,
One end side to the other end side of the lower column structure so that the upper column structure is supported on one end side to the other end side of the lower column structure Is an elongated structure that is pivotably coupled around the second horizontal axis and forms an upper abutment surface that is a surface on one end side,
The intermediate link includes the lower intermediate link and an upper intermediate link that is swingably connected around the fifth horizontal axis to the one end side of the upper column structure. And the lower intermediate link and the upper intermediate link are connected to each other so as to be swingable around a third horizontal axis,
The folding posture is such that the lower column structure and the upper column structure are folded with their longitudinal directions being substantially horizontal, and the wire support member is parallel to the longitudinal direction along the upper column structure. Yes,
The standing posture is such that the lower strut structure and the upper strut structure are substantially perpendicular to each other and the lower abutment surface facing upward and the upper abutment surface facing downward contact each other. The wire support member is in a posture in which longitudinal directions are arranged in parallel along the back link.
The tower crane according to claim 3.

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