Patent Grant
11319196
The present invention relates to an intermediate support holder for a construction machine.
Patent Literature 1 (see FIG. 1) discloses an intermediate support line that connects a derricking member (a boom in the literature) for a construction machine and a guy line with each other. FIGS. 2A to 2E in the literature disclose states of work of attaching an intermediate support line to a guy line.
In the technique disclosed in the literature, the intermediate support line is attached to the guy line in a manner such that the intermediate support line extends from the guy line toward the derricking member side. Thus, at the time of this attaching work, there is a need to secure a work space between the guy line and the derricking member. However, when a guy line is placed on a derricking member that has been laid down on the ground at the stage of assembling and disassembling work of a construction machine, for example, it is difficult to secure such a work space. Thus, the work of attaching the intermediate support line to the guy line is difficult, and the attaching work may take labor. Furthermore, a construction machine is generally provided with a pair of right and left guy lines and a pair of right and left intermediate support lines (two lines are respectively provided). Thus, it is necessary to perform the work of attaching the intermediate support line to the guy line on both the right and left sides, which takes labor.
It is an object of the present invention to provide an intermediate support holder for a construction machine, the intermediate support holder being capable of easily attaching an intermediate support line to a guy line even if there is not a sufficient work space between the guy line and the derricking member.
The present invention provides an intermediate support holder for a construction machine, the intermediate support holder being configured to be mounted in a construction machine including: a derricking member that includes a derricking member base end portion, a derricking member tip end portion opposite to the derricking member base end portion, and a derricking member intermediate portion located between the derricking member base end portion and the derricking member tip end portion and is supported at a body so as to be able to derrick; a derricking device that has a pair of right and left guy lines each including a guy line tip end portion connected with the derricking member tip end portion of the derricking member, a guy line base end portion opposite to the guy line tip end portion, and a guy line intermediate portion located between the guy line base end portion and the guy line tip end portion and causes the derricking member to derrick; and a pair of right and left intermediate support lines that each have an intermediate support base end portion coupled to the guy line intermediate portion of each of the guy lines, and an intermediate support tip end portion coupled to the derricking member intermediate portion of the derricking member and connect the pair of right and left guy line intermediate portions and the derricking member intermediate portion with each other. The intermediate support holder includes: a pair of right and left guy line retaining units that can respectively retain the guy line intermediate portions of the pair of right and left guy lines; a pair of right and left intermediate support line retaining units that are respectively disposed adjacent to the pair of right and left guy line retaining units in a right-left direction and can respectively retain the intermediate support base end portions of the pair of right and left intermediate support lines; and a connecting unit that connects the pair of right and left guy line retaining units and the pair of right and left intermediate support line retaining units with each other along the right-left direction.
With reference to
The crane 1 is a construction machine that performs works such as lifting a load. The crane 1 includes a lower travelling body 11, an upper slewing body 13, a boom 21 (a derricking member, an attachment), a jib 23 (a derricking member, an attachment), a boom support member 31, and a jib support member 33.
The lower travelling body 11 is a part that allows the crane 1 to travel, and may include a crawler or a wheel. The upper slewing body 13 is loaded on the lower travelling body 11 and can slew with respect to the lower travelling body 11.
The boom 21 is attached to the upper slewing body 13 so as to be able to derrick. The boom 21 is a lattice boom having a lattice structure. The boom 21 has a plurality of components (boom members constituting the boom 21) coupled to each other along the longitudinal direction (axial direction) in which the boom 21 extends. The components constituting the boom 21 include a lower boom 21a closest to the base end side, an intermediate boom 21b, and an upper boom 21c closest to the tip end side, in this order from the base end side (upper slewing body 13 side) to the tip end side (opposite to the upper slewing body 13 side). The intermediate boom 21b has a plurality of components coupled to each other.
The jib 23 is attached to the tip end portion (upper boom 21c) of the boom 21 so as to be able to freely derrick, so that the jib 23 is supported by the upper slewing body 13 via the boom 21 so as to be able to derrick. The above “end portion” means an end and a part near an end (the same applies hereinafter). The jib 23 is a lattice jib having a lattice structure. The jib 23 has a plurality of components (jib members constituting the jib 23) coupled to each other along the longitudinal direction (axial direction) in which the jib 23 extends. The components constituting the jib 23 are coupled at connectors 23e (see
As illustrated in
The gantry 31a is a structure that is attached and fixed to the upper slewing body 13. The lower spreader 31b is provided at a tip end portion of the gantry 31a. The upper spreader 31c is disposed at a position higher than the lower spreader 31b. The boom derricking rope 31d is attached to (hung from) the lower spreader 31b and the upper spreader 31c. The boom guy lines 31g are attached (linked) to the upper spreader 31c and a tip end portion (upper boom 21c) of the boom 21. The pair of right and left boom guy lines 31g are provided at an interval from each other in the right-left direction Y. The right-left direction Y is a width direction of the boom 21 and is a direction of the rotation axis of the boom 21 with respect to the upper slewing body 13 (a direction in which the rotation axis extends). The right-left direction Y is also a width direction of the jib 23 and is also a direction of the rotation axis of the jib 23 with respect to the boom 21. A winch (not shown) winds and unwinds the boom derricking rope 31d, thereby changing the interval between the lower spreader 31b and the upper spreader 31c. As a result, the boom 21 derricks with respect to the upper slewing body 13. It is to be noted that a mast that can derrick with respect to the upper slewing body 13 may be provided instead of the gantry 31a. In this case, the boom guy lines 31g are disposed to connect a tip end portion of the mast and a tip end portion of the boom 21 with each other.
The jib support member 33 (derricking device) supports the jib 23 from behind, and causes the jib 23 to derrick with respect to the boom 21. The jib support member 33 includes a strut 33a, a strut guy line 33b, a jib derricking rope 33c, a pair of right and left jib guy lines 40, a pair of right and left jib intermediate support lines 50 (intermediate support lines), and the intermediate support bracket 60 (intermediate support holder). The jib support member 33 is connected with the jib 23 by the pair of right and left jib guy lines 40 and causes the jib 23 to derrick.
The strut 33a is attached to at least one of the upper boom 21c and the lower jib 23a so as to be able to derrick. The strut 33a includes a rear strut 33a1 and a front strut 33a2. The rear strut 33a1 is attached to the upper boom 21c so as to be able to derrick. The front strut 33a2 is attached to a base end portion of the lower jib 23a so as to be able to derrick. The front strut 33a2 may be attached to the upper boom 21c so as to be able to derrick. When the crane 1 is in a working posture, the front strut 33a2 is disposed at a position higher than the rear strut 33a1. It is to be noted that only one strut 33a may be provided.
The strut guy line 33b is attached (linked) to a tip end portion of the rear strut 33a1 (an end portion opposite to the upper boom 21c side) and to a lower portion of the boom 21 (or the upper stewing body 13). The jib derricking rope 33c is hung from a sheave of a tip end portion of the rear strut 33a1 and from a sheave of a tip end portion of the front strut 33a2 (an end portion opposite to the lower jib 23a side).
The pair of right and left jib guy lines 40 (guy lines) are attached (linked) to a tip end portion of the front strut 33a2 and to a tip end portion of the jib 23. The pair of right and left jib guy lines 40 are provided at an interval from each other in the right-left direction Y (see
Each jib guy line 40 has at least one of a link member (guy link) and a wire rope (guy rope). In the example illustrated in
The pair of right and left jib intermediate support lines 50 (intermediate support lines) are attached to the jib guy line intermediate portions 40m and the jib intermediate portion 23m (connect the pair of right and left jib guy line intermediate portions 40m and the jib intermediate portion 23m with each other). The pair of right and left jib intermediate support lines 50 are provided at an interval from each other in the right-left direction Y (see
Each intermediate support base end member 51 is provided at a base end portion of a jib intermediate support line 50 (an end portion on the intermediate support bracket 60 side) and is coupled to a jib guy line intermediate portion 40m of a jib guy line 40. As illustrated in
Each intermediate support tip end member 52 is provided at a tip end portion of a jib intermediate support line 50 (an end portion on the jib intermediate portion 23m side) and is coupled to the jib intermediate portion 23m of the jib 23. In the example illustrated in
As illustrated in
The intermediate support bracket 60 is a member for branching the jib intermediate support lines 50 from the jib guy lines 40 as illustrated in
[On Directions and the like] As illustrated in
The pair of right and left guy line attachment portions 61 are configured in a manner such that the jib guy line intermediate portions 40m of the jib guy lines 40 can be attached to the guy line attachment portions 61 as illustrated in
The pair of right and left intermediate support attachment portions 63 are configured in a manner such that a base end portion (intermediate support base end member 51) of each jib intermediate support line 50 can be attached to an intermediate support attachment portion 63. As a result, the pair of right and left intermediate support attachment portions 63 can respectively retain base end portions of the pair of right and left jib intermediate support lines 50. Each intermediate support attachment portion 63 is configured to sandwich a jib intermediate support line 50 between a second plate member 72 and a third plate member 73. Each jib intermediate support line 50 can be attached to an intermediate support attachment portion 63 via a front pin P77. Each jib intermediate support line 50 is rotatable about a front pin P77 (on an axis in the right-left direction Y) with respect to an intermediate support attachment portion 63. The intermediate support attachment portions 63 are disposed so as to be aligned in the right-left direction Y with respect to the guy line attachment portions 61. For example, the intermediate support attachment portions 63 are disposed so as to be shifted and aligned in the right-left direction Y with respect to the guy line attachment portions 61. The intermediate support attachment portions 63 are disposed (shifted) at positions outer than the guy line attachment portions 61 in the right-left direction Y. It is to be noted that the intermediate support attachment portions 63 may be disposed at positions inner than the guy line attachment portions 61 in the right-left direction Y (which will be described later). The intermediate support attachment portions 63 include a left intermediate support attachment portion 63L and a right intermediate support attachment portion 63R. The left jib intermediate support line 50 can be attached to the left intermediate support attachment portion 63L. The right jib intermediate support line 50 can be attached to the right intermediate support attachment portion 63R.
The pair of right and left first plate members 71 (first retaining members) are plate members that constitute the guy line attachment portions 61 as illustrated in
The pair of right and left second plate members 72 (second retaining members) are plate members that constitute the intermediate support attachment portions 63. The pair of right and left second plate members 72 are disposed respectively at intervals from the pair of right and left first plate members 71 in the right-left direction Y. The pair of right and left second plate members 72 are disposed in parallel with the pair of right and left first plate members 71, and are disposed so as to face the pair of right and left first plate members 71 in the right-left direction Y.
The pair of right and left third plate members 73 (third retaining members) constitute the guy line attachment portions 61 and the intermediate support attachment portions 63. The pair of right and left third plate members 73 are shared by the guy line attachment portions 61 and the intermediate support attachment portions 63. That is, the pair of right and left third plate members 73 constitute the pair of right and left guy line attachment portions 61 together with the pair of right and left first plate members 71, and constitute the pair of right and left intermediate support attachment portions 63 together with the pair of right and left second plate members 72. The pair of right and left third plate members 73 are disposed between the pair of right and left first plate members 71 and the pair of right and left second plate members 72 (in the right-left direction Y). Each third plate member 73 is disposed at an interval from a first plate member 71 in the right-left direction Y, and is disposed at an interval from a second plate member 72 in the right-left direction Y. The third plate members 73 are disposed respectively in parallel with the first plate members 71 and the second plate members 72. The third plate members 73 are disposed so as to face the first plate members 71 in the right-left direction Y. (A part of) each third plate member 73 is disposed so as to face a second plate member 72 in the right-left direction Y.
The rear pin holes 75 are pin holes to which the rear pins P75 are attached as illustrated in
The front pin holes 77 are pin holes to which the front pins P77 are attached. The front pins P77 are pins for attaching the jib guy lines 40 to the guy line attachment portions 61 and attaching the jib intermediate support lines 50 to the intermediate support attachment portions 63. The front pin holes 77 penetrate the first plate members 71, the second plate members 72, and the third plate members 73 in the right-left direction Y.
Coupling plates 79 couple the first plate members 71 and the third plate members 73 adjacent in the right-left direction Y to each other, and couple the third plate members 73 and the second plate members 72 adjacent in the right-left direction Y to each other. As illustrated in
The transverse member 80 suppresses the twist of the jib guy lines 40 illustrated in
This transverse member 80 has a structure that can secure as much weight reduction and strength enhancement as possible. Specifically, (all or a part of) the transverse member 80 has a box-shaped structure (hollow structure). A box-shaped structure part of the transverse member 80 is provided (continuously) from a left end portion to a right end portion of each of the guy line attachment portions 61 and the intermediate support attachment portions 63. In the example illustrated in
As illustrated in
The pair of right and left suspension rings 93 are rings for lifting the intermediate support bracket 60 with an assembling crane (not shown) or the like. The suspension rings 93 are provided on the upper surface (first surface 80A) of the transverse member 80 and protrude upward from the upper surface of the transverse member 80.
[On Assembly] The jib intermediate support lines 50 illustrated in
The jib 23 is disposed, for example, on the ground so that the longitudinal direction of the jib 23 becomes a horizontal direction or a substantially horizontal direction. The pair of right and left jib guy lines 40 are placed on the rear surface (top surface) of the jib 23. When a part of a jib guy line 40 that is to be relayed by the intermediate support bracket 60 is relayed by a link member (see 40V in
Next, the intermediate support bracket 60 is placed (deposited) on the rear surface of the jib 23. At this time, the guy line attachment portions 61 (see
The intermediate support tip end members 52 are attached to the connectors 23e of the jib intermediate portions 23m (
As illustrated in
Regarding the pin holes 77, it is to be noted that the pin holes 77 opened at positions facing each other along the right-left direction are formed at the pair of right and left first plate members 71, the pair of right and left second plate members 72, and the pair of right and left third plate members 73. In addition, the pin holes 77 receive the pins P77 inserted through the guy line pin holes 40ms and the intermediate support pin holes 51s and allow the jib guy lines 40 and the jib intermediate support lines 50 to be respectively retained by the pins P77 at the guy line attachment portions 61 and the intermediate support attachment portions 63 in a state where the pair of right and left jib guy line intermediate portions 40m are respectively disposed between the pair of right and left first plate members 71 and the pair of right and left third plate members 73, and the pair of right and left intermediate support base end members 51 are respectively disposed between the pair of right and left second plate members 72 and the pair of right and left third plate members 73.
In the above work, there is no need to provide a work space between the jib guy line intermediate portions 40m and the jib 23 as illustrated in
Here, description will be given on problems to occur when a work space is provided between the jib guy line intermediate portions 40m and the jib 23 in the process of the work of attaching the jib intermediate support lines 50 to the jib guy lines 40. In order to provide this work space, it is conceivable that the jib 23 illustrated in
After the jib intermediate support lines 50 are assembled, the boom 21 is raised with respect to the upper slewing body 13 and the jib 23 is raised with respect to the boom 21 as illustrated in
[On Force to Act on Intermediate Support Bracket 60 or the like during Crane Work] When the crane 1 is in a working posture (during crane work), tension acts on each of the jib guy lines 40 and the jib intermediate support lines 50 (see tension T40 and tension T50) as illustrated in
During crane work, the jib intermediate support lines 50 are disposed on outer sides in the right-left direction Y (the interval between the two jib intermediate support lines 50 in the right-left direction Y becomes wider) with the distance from the base end side (intermediate support bracket 60 side) toward the tip end side. Thus, the intermediate support attachment portions 63 receive outward force in the right-left direction Y due to the tension T50 of the jib intermediate support lines 50. Thus, if the transverse member 80 illustrated in
Moreover, during crane work, the jib intermediate support lines 50 are disposed so as to move away from the jib guy lines 40 and approach the jib 23 with the distance from the base end side (intermediate support bracket 60 side) toward the tip end side as illustrated in
[Effects] The effects of the intermediate support bracket 60 illustrated in
The pair of right and left jib guy lines 40 (guy lines) and the pair of right and left jib intermediate support lines 50 (intermediate supports) can be attached to the intermediate support bracket 60. As illustrated in
Intermediate portions of the jib guy lines 40 (jib guy line intermediate portions 40m) can be attached to the guy line attachment portions 61. The intermediate support attachment portions 63 are disposed so as to be aligned in the right-left direction Y with respect to the guy line attachment portions 61, and base end portions of the jib intermediate support lines 50 can be attached to the intermediate support attachment portions 63.
The transverse member 80 couples and fixes the left guy line attachment portion 61L, the left intermediate support attachment portion 63L, the right guy line attachment portion 61R, and the right intermediate support attachment portion 63R to each other.
With the above configuration, base end portions of the jib intermediate support lines 50 can be attached to the jib guy line intermediate portions 40m via the intermediate support bracket 60 so as to be aligned in the right-left direction Y with respect to the jib guy line intermediate portions 40m. Therefore, there is no need to provide a work space between the jib guy line intermediate portions 40m and the jib 23 when base end portions of the jib intermediate support lines 50 are attached to the jib guy line intermediate portions 40m as illustrated in
Moreover, in the above configuration, base end portions of the jib intermediate support lines 50 can be disposed so as to be aligned in the right-left direction Y with respect to the jib guy line intermediate portions 40m as illustrated in
As illustrated in
In the above configuration, the third plate members 73 are used for both the guy line attachment portions 61 and the intermediate support attachment portions 63. Therefore, the number of members constituting the intermediate support bracket 60 can be reduced as compared with a case where there is no member that is used for both the guy line attachment portions 61 and the intermediate support attachment portions 63. Thus, the intermediate support bracket 60 can be configured simply, and the weight of the intermediate support bracket 60 can be reduced.
As illustrated in
In the above configuration, the jib intermediate support lines 50 can be attached to the intermediate support bracket 60 by inserting the front pins P77 into the front pin holes 77 and the guy line pin holes 40ms. Furthermore, the jib guy lines 40 can be attached to the intermediate support bracket 60 by inserting the front pins P77 into the front pin holes 77, the intermediate support pin holes 51s, and the guy line pin holes 40ms. Therefore, the number of pins can be reduced and the labor for attaching and detaching the pins can be suppressed as compared with a case where there is no pin used for both the attachment of the jib intermediate support lines 50 and the attachment of the jib guy lines 40.
As illustrated in
In the above configuration, when the crane 1 (see
(Variations)
The above embodiment may be variously modified. For example, the arrangement or shape of each component may be changed. For example, the number of components may be changed, and some of the components need not be provided. For example, at least any one of the resin pads 91 and the suspension rings 93 needs not be provided.
In the above embodiment, the intermediate support bracket 60 is attached to the jib guy line intermediate portions 40m and base end portions of the jib intermediate support lines 50 as illustrated in
In the above embodiment, a case where the jib 23 is disposed in a manner such that the longitudinal direction of the jib 23 becomes parallel to a horizontal direction or a substantially horizontal direction at the time of assembling the jib intermediate support lines 50 illustrated in
In the above embodiment, tip end portions (intermediate support tip end members 52) of the jib intermediate support lines 50 are disposed at positions outer than base end portions (intermediate support base end members 51) in the right-left direction Y as illustrated in
The present invention provides an intermediate support holder for a construction machine, the intermediate support holder being configured to be mounted in a construction machine including: a derricking member that includes a derricking member base end portion, a derricking member tip end portion opposite to the derricking member base end portion, and a derricking member intermediate portion located between the derricking member base end portion and the derricking member tip end portion and is supported at a body so as to be able to derrick; a derricking device that has a pair of right and left guy lines each including a guy line tip end portion connected with the derricking member tip end portion of the derricking member, a guy line base end portion opposite to the guy line tip end portion, and a guy line intermediate portion located between the guy line base end portion and the guy line tip end portion and causes the derricking member to derrick; and a pair of right and left intermediate support lines that each have an intermediate support base end portion coupled to the guy line intermediate portion of each of the guy lines, and an intermediate support tip end portion coupled to the derricking member intermediate portion of the derricking member and connect the pair of right and left guy line intermediate portions and the derricking member intermediate portion with each other. The intermediate support holder includes: a pair of right and left guy line retaining units that can respectively retain the guy line intermediate portions of the pair of right and left guy lines; a pair of right and left intermediate support line retaining units that are respectively disposed adjacent to the pair of right and left guy line retaining units in a right-left direction and can respectively retain the intermediate support base end portions of the pair of right and left intermediate support lines; and a connecting unit that connects the pair of right and left guy line retaining units and the pair of right and left intermediate support line retaining units with each other along the right-left direction.
The above configuration preferably includes: a pair of right and left first retaining members; a pair of right and left second retaining members disposed at an interval in the right-left direction with respect to the pair of right and left first retaining members; and a pair of right and left third retaining members respectively disposed between the pair of right and left first retaining members and the pair of right and left second retaining members in the right-left direction, the pair of right and left third retaining members constituting the pair of right and left guy line retaining units together with the pair of right and left first retaining members, and constituting the pair of right and left intermediate support line retaining units together with the pair of right and left second retaining members.
In the above configuration, it is preferable that a guy line pin hole extending along the right-left direction is formed at each of the guy line intermediate portions of the pair of right and left guy lines, an intermediate support pin hole extending along the right-left direction is formed at each of the intermediate support base end portions of the pair of right and left intermediate support lines, and holder pin holes that are opened at positions facing each other in the right-left direction, receive pins inserted through the guy line pin holes and the intermediate support pin holes in a state where the pair of right and left guy line intermediate portions are respectively disposed between the pair of right and left first retaining members and the pair of right and left third retaining members, and the pair of right and left intermediate support base end portions are respectively disposed between the pair of right and left second retaining members and the pair of right and left third retaining members, and allow the guy lines and the intermediate support lines to be respectively retained by the pins at the guy line retaining unit and the intermediate support line retaining unit are formed at the pair of right and left first retaining members, the pair of right and left second retaining members, and the pair of right and left third retaining members.
In the above configuration, the connecting unit preferably has a box-shaped structure including: a first surface extending along the right-left direction; a second surface extending along the right-left direction opposite to the first surface; and a pair of third surfaces that extend along the right-left direction and connect the first surface and the second surface with each other.
| Number | Date | Country | Kind |
|---|---|---|---|
| JP2017-234163 | Dec 2017 | JP | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/JP2018/041906 | 11/13/2018 | WO | 00 |
| Publishing Document | Publishing Date | Country | Kind |
|---|---|---|---|
| WO2019/111642 | 6/13/2019 | WO | A |
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| 20110132860 | Bohnacker | Jun 2011 | A1 |
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| 20180319636 | Albinger | Nov 2018 | A1 |
| Number | Date | Country |
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| 101525108 | Sep 2009 | CN |
| 202022678 | Nov 2011 | CN |
| 202657871 | Jan 2013 | CN |
| 102556861 | May 2014 | CN |
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| 10-120371 | May 1998 | JP |
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| Number | Date | Country | |
|---|---|---|---|
| 20210171323 A1 | Jun 2021 | US |
