JP3216178U - Fall prevention device - Google Patents
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- JP3216178U JP3216178U JP2018000710U JP2018000710U JP3216178U JP 3216178 U JP3216178 U JP 3216178U JP 2018000710 U JP2018000710 U JP 2018000710U JP 2018000710 U JP2018000710 U JP 2018000710U JP 3216178 U JP3216178 U JP 3216178U
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Abstract
【課題】格納姿勢において上方に張り出す寸法を小さくし、上方の空間に制限がある場合においても適用することが可能な墜落防止装置を提供する。【解決手段】支柱部材61の基端側は、ベース部材62に対する支柱部材61の揺動の規制を解除した状態において、上下方向の所定範囲内を移動可能にベース部材62に連結されており、格納姿勢において作業姿勢よりも下方に位置している。これにより、格納姿勢において墜落防止装置60の全体の高さ寸法を小さくすることができるので、上方への張出寸法に制限がある箇所にも墜落防止装置60を設置することができ、支柱部材61を保管する場所を別途必要とせず、支柱部材61を作業可能な状態とするための作業効率の向上を図ることが可能となる。【選択図】図5The present invention provides a fall prevention device that can be applied even when there is a restriction on an upper space by reducing the size of an upward projection in a retracted posture. A base end side of a column member 61 is connected to the base member 62 so as to be movable within a predetermined range in the vertical direction in a state where the restriction of the swing of the column member 61 relative to the base member 62 is released. The retracted position is located below the working position. Thereby, since the overall height dimension of the fall prevention device 60 can be reduced in the retracted posture, the fall prevention device 60 can be installed in a place where the upward projecting dimension is limited, and the column member It is possible to improve work efficiency for making the column member 61 workable without separately requiring a place for storing 61. [Selection] Figure 5
Description
本考案は、例えば、移動式クレーン等の作業車両の車体の上部に設けられ、車体の上部において高所作業を行う作業者が安全帯のフックを掛ける支柱部材を備えた墜落防止装置に関するものである。 The present invention relates to a crash prevention device provided with a column member that is provided on an upper part of a vehicle body of a work vehicle such as a mobile crane and on which a worker who performs work at a high place on the upper part of the vehicle body hooks a hook of a safety belt. is there.
従来の墜落防止装置では、設置個所に固定されるベース部材と、先端部に安全帯のフックまたは親綱を係止する係止部が設けられると共に基端側にベース部材に対して揺動自在に連結される連結部が設けられた支柱部材と、を備えたものが知られている(例えば、特許文献1)。 In the conventional crash prevention device, a base member fixed at an installation location, a locking portion for locking a safety belt hook or a master rope is provided at the distal end portion, and the base end side is swingable with respect to the base member. There is known a support member provided with a support member provided with a connecting part connected to (for example, Patent Document 1).
前記墜落防止装置では、支柱部材の先端部を上方に向けた作業姿勢と、支柱部材の先端部を側方に向けた格納姿勢と、の切り替えが可能となっている。 In the fall prevention device, it is possible to switch between a working posture in which the tip end portion of the column member faces upward and a storage posture in which the tip portion of the column member faces sideward.
前記墜落防止装置では、格納姿勢とした場合に、支柱部材の全体が上方に張り出した状態となる。このため、前記墜落防止装置は、例えば、クレーン装置のカウンタウエイト等、互いに積層されるウエイトに墜落防止装置を設置する場合など、上方の空間に制限がある場合に適用することが困難であり、支柱部材を着脱する着脱式の墜落防止装置を適用することになる。着脱式の墜落防止装置は、取り外した支柱部材の保管場所の確保が困難な場合や、支柱部材を設置するための作業時間が長時間となって高所作業の作業効率が低下する可能性がある。 In the fall prevention device, when the retracted posture is adopted, the entire support member projects upward. For this reason, the fall prevention device is difficult to apply when there is a restriction in the upper space, for example, when the fall prevention device is installed on weights stacked on each other, such as a counterweight of a crane device, A detachable fall prevention device for attaching and detaching the column member is applied. The detachable type fall prevention device may reduce the work efficiency of work in high places when it is difficult to secure the storage location for the removed strut member or when the work time for installing the strut member is long. is there.
本考案の目的とするところは、格納姿勢において上方に張り出す寸法を小さくし、上方の空間に制限がある場合においても適用することが可能な墜落防止装置を提供することにある。 An object of the present invention is to provide a crash prevention device that can be applied even when the upper space is limited in a retracted posture and the upper space is limited.
本考案は、前記目的を達成するために、設置個所に固定されるベース部材と、先端部に安全帯のフックまたは親綱を係止する係止部が設けられ、基端側がベース部材に対して揺動自在に連結された支柱部材と、を備え、支柱部材は、先端部を上方に向けた状態でベース部材に対する揺動が規制された作業姿勢と、ベース部材に対する揺動の規制を解除して先端部を側方に向けた格納姿勢と、の切り替えが可能であり、支柱部材の基端側は、ベース部材に対する支柱部材の揺動の規制を解除した状態において、上下方向の所定範囲内を移動可能にベース部材に連結されており、格納姿勢において作業姿勢よりも下方に位置する。 In order to achieve the above-mentioned object, the present invention is provided with a base member fixed at an installation location, a locking portion for locking a safety belt hook or a master rope at the distal end portion, and a base end side with respect to the base member. A support member that is swingably connected to the support member, and the support member has a working posture in which swinging with respect to the base member is restricted with the tip portion facing upward, and the restriction of swinging with respect to the base member is released. Thus, it is possible to switch between the retracted posture with the tip portion directed sideways, and the base end side of the support member is a predetermined range in the vertical direction in a state where the restriction of the swing of the support member relative to the base member is released. It is connected to the base member so as to be movable inside, and is positioned below the working posture in the retracted posture.
これにより、格納姿勢において支柱部材の基端側の高さ寸法を小さくすることが可能となることから、格納姿勢において墜落防止装置の全体の高さ寸法を小さくすることが可能となる。 Thereby, since the height dimension of the base end side of the support member can be reduced in the retracted posture, the overall height dimension of the fall prevention device can be decreased in the retracted posture.
本考案によれば、格納姿勢において墜落防止装置の全体の高さ寸法を小さくすることができるので、上方への張出寸法に制限がある箇所にも設置することができ、支柱部材を保管する場所を別途必要とせず、支柱部材を作業可能な状態とするための作業効率の向上を図ることが可能となる。 According to the present invention, since the overall height dimension of the fall prevention device can be reduced in the retracted posture, it can be installed in a place where the upward projecting dimension is limited, and the column member is stored. It is possible to improve work efficiency for making the column member workable without separately requiring a place.
図1乃至図8は、本考案の一実施形態を示すものである。 1 to 8 show an embodiment of the present invention.
本考案の墜落防止装置を有する移動式クレーン1は、図1に示すように、一般の道路や作業エリア内を走行するための車体10と、クレーン作業を行うためのクレーン装置20と、車体10の走行及びクレーン装置20によるクレーン作業の操作を行うためのキャブ30と、を備えている。クレーン装置20及びキャブ30は、車体10に対して水平方向に旋回可能な旋回台40に支持され、旋回台40の幅方向一方にクレーン装置20が配置され、幅方向他方にキャブ30が配置されている。 As shown in FIG. 1, a mobile crane 1 having a crash prevention device of the present invention includes a vehicle body 10 for traveling in a general road or a work area, a crane device 20 for performing crane work, and a vehicle body 10. And a cab 30 for performing crane operation by the crane device 20. The crane device 20 and the cab 30 are supported by a turntable 40 that can turn in the horizontal direction with respect to the vehicle body 10, the crane device 20 is arranged on one side in the width direction of the turntable 40, and the cab 30 is arranged on the other side in the width direction. ing.
車体10は、車輪11を有し、エンジンを動力源として走行する。また、車体10の前側及び後側の左右両側には、クレーン作業時に車体10を持ち上げて支持するためのアウトリガ12が設けられている。 The vehicle body 10 has wheels 11 and travels using an engine as a power source. Outriggers 12 are provided on both the left and right sides of the front and rear sides of the vehicle body 10 for lifting and supporting the vehicle body 10 during crane work.
クレーン装置20は、車体10に対して起伏自在に設けられると共に伸縮自在な伸縮ブーム21を有している。 The crane device 20 includes a telescopic boom 21 that is provided so as to be able to be raised and lowered relative to the vehicle body 10 and that is telescopic.
移動式クレーン1では、伸縮ブーム21の先端から荷物を吊り下げた状態における車体の安定性を得るために、図1及び図2に示すように、旋回台40の後部にカウンタウエイト50が着脱自在に装着される。 In the mobile crane 1, a counterweight 50 is detachably attached to the rear part of the swivel base 40, as shown in FIGS. 1 and 2, in order to obtain the stability of the vehicle body in a state where a load is suspended from the tip of the telescopic boom 21. It is attached to.
カウンタウエイト50は、互いに積層される複数の板状のウエイト51と、積層したウエイト51の幅方向両側に連結されるブロック状のウエイト52と、を有している。旋回台40の後部に対してカウンタウエイト50を着脱する際には、油圧アクチュエータにホースを接続する作業やウエイト51にウエイト52を連結する作業等、旋回台40に取り付けられたウエイト51の上面において作業者が作業する高所作業の状態が発生する。 The counterweight 50 includes a plurality of plate-like weights 51 stacked on each other, and block-shaped weights 52 connected to both sides in the width direction of the stacked weights 51. When attaching / detaching the counterweight 50 to / from the rear part of the swivel base 40, such as an operation of connecting a hose to the hydraulic actuator or an operation of connecting the weight 52 to the weight 51, the upper surface of the weight 51 attached to the swivel base 40 There is a situation of work at high places where workers work.
旋回台40の後部に取り付けられたウエイト51の上面で高所作業を行う作業者は、図3に示すように、ウエイト51の外周部に設けられた墜落防止装置60を使用する。 As shown in FIG. 3, an operator who performs work at a high place on the upper surface of the weight 51 attached to the rear part of the swivel base 40 uses a fall prevention device 60 provided on the outer periphery of the weight 51.
墜落防止装置60は、安全帯のフックを掛けるための支柱部材61と、ウエイト51に固定されたベース部材62と、支柱部材61とベース部材62とを連結する連結部材63と、格納姿勢において支柱部材61の先端側を下方から支持するための支持部材64と、を有している。 The fall prevention device 60 includes a support member 61 for hooking a safety belt, a base member 62 fixed to the weight 51, a connecting member 63 for connecting the support member 61 and the base member 62, and a support member in the retracted posture. And a support member 64 for supporting the distal end side of the member 61 from below.
支柱部材61は、例えば約1メートルの軸方向寸法を有する円柱状の部材からなり、図3乃至図5に示すように、先端部に安全帯のフックを掛けるためのフック係止部61aが設けられ、図6に示すように、基端部にベース部材62の後述する支柱保持部に嵌合する嵌合部61bが設けられている。また、支柱部材61における嵌合部61bの近傍には、連結部材63の後述する支柱側連結部に対して所定範囲内で周方向及び軸方向に移動を規制する突起部61cが設けられている。 The column member 61 is made of a cylindrical member having an axial dimension of about 1 meter, for example, and as shown in FIGS. 3 to 5, a hook locking portion 61a for hooking a safety belt hook is provided at the tip portion. As shown in FIG. 6, the base end portion is provided with a fitting portion 61 b that fits into a column holding portion described later of the base member 62. Further, in the vicinity of the fitting portion 61b of the support member 61, a protrusion 61c that restricts the movement in the circumferential direction and the axial direction within a predetermined range with respect to a support-side connection portion of the connection member 63 described later is provided. .
ベース部材62は、図6に示すように、支柱部材61の嵌合部61bが嵌合する円筒状の支柱保持部62aと、支柱保持部62aの外周側において連結部材63を上下方向且つ支柱保持部62aの径方向に案内する一対の案内部62bと、を有している。一対の案内部62bには、連結部材63の後述する連結軸63cが通される長孔62b1がそれぞれ形成されている。長孔62b1は、支柱保持部62aの径方向外側から内側に向かって斜め上方に延びる直線部62b2と、直線部62b2の上端部から屈曲して斜め下方に延びる作業位置保持部62b3と、からなる。 As shown in FIG. 6, the base member 62 holds the connecting member 63 in the vertical direction and the column support on the outer peripheral side of the column holding unit 62a and the cylindrical column holding unit 62a into which the fitting unit 61b of the column member 61 is fitted. A pair of guide portions 62b for guiding in the radial direction of the portion 62a. A long hole 62b1 through which a connecting shaft 63c (described later) of the connecting member 63 passes is formed in the pair of guide portions 62b. The long hole 62b1 includes a linear portion 62b2 that extends obliquely upward from the radial outer side to the inner side of the support column holding portion 62a, and a work position holding portion 62b3 that is bent from the upper end portion of the linear portion 62b2 and extends obliquely downward. .
連結部材63は、図4乃至図6に示すように、支柱部材61に連結される支柱側連結部63aと、ベース部材62に連結されるベース側連結部63bと、を有している。 As shown in FIGS. 4 to 6, the connecting member 63 includes a support-side connecting portion 63 a connected to the support member 61 and a base-side connecting portion 63 b connected to the base member 62.
支柱側連結部63aは、円筒状に形成され、支柱部材61の基端側が連結される。支柱側連結部63aには、軸方向に延びると共に軸方向両端部から周方向に延びる長孔63a1が形成され、長孔63a1の範囲内で支柱部材61の突起部61cが移動可能である。 The column-side connecting portion 63a is formed in a cylindrical shape, and the base end side of the column member 61 is connected. A long hole 63a1 that extends in the axial direction and extends in the circumferential direction from both ends in the axial direction is formed in the column-side connecting portion 63a, and the protrusion 61c of the column member 61 is movable within the range of the long hole 63a1.
長孔63a1は、図6に示すように、支柱側連結部63aの軸方向に延びる直線部63a2と、直線部63a2の先端側の端部から周方向に屈曲する格納姿勢保持部63a3と、直線部63a2の基端側の端部から周方向に屈曲すると共に軸方向に屈曲して延びる作業姿勢保持部63a4と、からなる。 As shown in FIG. 6, the long hole 63a1 includes a straight portion 63a2 extending in the axial direction of the support column side connecting portion 63a, a storage posture holding portion 63a3 that bends in a circumferential direction from an end portion on the distal end side of the straight portion 63a2, And a working posture holding portion 63a4 that bends in the circumferential direction and extends in the axial direction from the proximal end of the portion 63a2.
即ち、支柱部材61は、突起部61cを直線部63a2に位置させると、支柱側連結部63aに対して軸方向に直線部63a2の長さの範囲内で移動自在となる。また、支柱部材61は、突起部61cを格納姿勢保持部63a3に位置させると、軸方向の移動が規制され、嵌合部61bが支柱側連結部63a内周側に位置する状態が保持される。更に、支柱部材61は、突起部61cを作業姿勢保持部63a4に位置させると、軸方向の移動が規制され、嵌合部61bが支柱側連結部63aの基端部から突出した状態が保持される。 In other words, the column member 61 is movable within the range of the length of the linear portion 63a2 in the axial direction with respect to the column side connecting portion 63a when the protruding portion 61c is positioned at the linear portion 63a2. Further, when the protruding portion 61c is positioned in the retracted posture holding portion 63a3, the support member 61 is restricted from moving in the axial direction, and the state in which the fitting portion 61b is positioned on the inner peripheral side of the support column side connecting portion 63a is maintained. . Further, when the protrusion 61c is positioned at the work posture holding part 63a4, the support member 61 is restricted from moving in the axial direction, and the fitting part 61b is held in a state of protruding from the base end part of the support side connecting part 63a. The
ベース側連結部63bは、支柱側連結部63aの基端側の外周部から径方向外側に延びる一対の板状に形成され、ベース部材62の一対の案内部62bの長孔62b1に連結軸63cを介して連結される。連結部材63は、ベース部材62に対して長孔62b1の範囲内で移動自在であると共にベース部材62に対して揺動自在である。 The base side connecting portion 63b is formed in a pair of plates extending radially outward from the outer peripheral portion on the base end side of the column side connecting portion 63a, and the connecting shaft 63c is inserted into the elongated holes 62b1 of the pair of guide portions 62b of the base member 62. It is connected via. The connecting member 63 is movable with respect to the base member 62 within the range of the long hole 62 b 1 and is swingable with respect to the base member 62.
即ち、連結部材63は、図6に示すように、連結軸63cを長孔62b1の直線部62b2に位置させると、ベース部材62に対して支柱側連結部63aの径方向且つ上下方向に移動自在となる。また、連結部材63は、連結軸63cを長孔62b1の作業位置保持部62b3に位置させると、下方への移動が規制され、ベース部材62の上側に位置する状態が保持される。 That is, as shown in FIG. 6, when the connecting shaft 63c is positioned at the straight portion 62b2 of the elongated hole 62b1, the connecting member 63 is movable in the radial direction and the vertical direction of the support column side connecting portion 63a with respect to the base member 62. It becomes. In addition, when the connecting shaft 63c is positioned at the work position holding portion 62b3 of the long hole 62b1, the connecting member 63 is restricted from moving downward and is held at the upper side of the base member 62.
また、連結部材63は、連結軸63cを長孔62b1の作業位置保持部62b3に位置させた状態で、支柱側連結部63aをベース部材62の支柱保持部62a側に回転させると、支柱保持部62aの上端開口に支柱側連結部63aの基端開口が接続された状態となる。 Further, when the connecting shaft 63c is rotated to the column holding portion 62a side of the base member 62 while the connecting shaft 63c is positioned at the work position holding portion 62b3 of the long hole 62b1, the connecting member 63 is rotated. The base end opening of the support column side connecting portion 63a is connected to the upper end opening of 62a.
支持部材64は、板状のウエイト51の外周部におけるベース部材62と間隔をおいた位置に固定されている。支持部材64は、上面に断面V字状の溝が形成されており、V字状の溝に支柱部材61の先端側が係合した状態で支持される。 The support member 64 is fixed at a position spaced from the base member 62 in the outer peripheral portion of the plate-like weight 51. The support member 64 has a groove with a V-shaped cross section formed on the upper surface, and is supported in a state in which the front end side of the column member 61 is engaged with the V-shaped groove.
以上のように構成された墜落防止装置60は、図4に示すように、支柱部材61の先端部を上方に向けた状態でベース部材62に対して支柱部材61の揺動が規制された姿勢である作業姿勢と、図5に示すように、ベース部材62に対して支柱部材61の揺動の規制を解除して支柱部材61の先端部を側方に向けた姿勢である格納姿勢と、の切り替えが可能である。 As shown in FIG. 4, the fall prevention device 60 configured as described above has a posture in which the swing of the support member 61 is restricted with respect to the base member 62 with the tip end portion of the support member 61 facing upward. And a retracted posture that is a posture in which the restriction of the swing of the support member 61 is released with respect to the base member 62 and the tip end portion of the support member 61 is directed to the side, as shown in FIG. Can be switched.
墜落防止装置60の格納姿勢において、支柱部材61の突起部61cは、図7の上段に示すように、連結部材63の支柱側連結部63aに設けられた長孔63a1の格納姿勢保持部63a3に位置している。また、墜落防止装置60の格納姿勢において、連結部材63のベース側連結部63bの連結軸63cは、ベース部材62の案内部62bに設けられた長孔62b1の直線部62b2の下端に位置している。 In the retracted posture of the fall prevention device 60, the protrusion 61c of the column member 61 is in contact with the retracted posture holding portion 63a3 of the elongated hole 63a1 provided in the column side connecting portion 63a of the connecting member 63, as shown in the upper part of FIG. positioned. Further, in the retracted posture of the fall prevention device 60, the connecting shaft 63c of the base side connecting portion 63b of the connecting member 63 is located at the lower end of the straight portion 62b2 of the long hole 62b1 provided in the guide portion 62b of the base member 62. Yes.
墜落防止装置60を格納姿勢から作業姿勢に切り替える場合に、作業者は、まず、支柱部材61を把持し、支柱部材61の下端部を持ち上げるとともに、支柱部材61の先端部を上方に向けて回転させる。このとき、支柱部材61の基端側に連結されている連結部材63は、図7の中段に示すように、ベース部材62の一対の案内部62bの長孔62b1の直線部62b2に沿って斜め上方に移動し、図7の下段に示すように、連結軸63cが長孔62b1の作業位置保持部62b3に位置すると、ベース側連結部63bの上下方向の位置が決められる。また、連結部材63の支柱側連結部63aは、ベース部材62の支柱保持部62aの上方に位置した状態となる。 When switching the fall prevention device 60 from the retracted position to the working position, the operator first holds the support member 61, lifts the lower end of the support member 61, and rotates the front end of the support member 61 upward. Let At this time, the connecting member 63 connected to the base end side of the column member 61 is oblique along the straight portion 62b2 of the long hole 62b1 of the pair of guide portions 62b of the base member 62, as shown in the middle stage of FIG. As shown in the lower part of FIG. 7, when the connecting shaft 63c is positioned at the work position holding portion 62b3 of the long hole 62b1, the vertical position of the base side connecting portion 63b is determined. In addition, the column-side connection portion 63 a of the connection member 63 is positioned above the column holding portion 62 a of the base member 62.
次に、作業者は、支柱部材61を把持しながら周方向一方に回転させる。このとき、支柱部材61は、突起部61cが長孔63a1の格納姿勢保持部63a3から直線部63a2に移動して下方への移動の規制が解除され、図8の上段に示すように、支柱部材61の自重によって下方に移動する。支柱部材61が下方に移動すると、支柱部材61の基端に位置する嵌合部61bがベース部材62の支柱保持部62aに嵌合し、支柱部材61の揺動が規制される。 Next, the operator rotates the column member 61 in one circumferential direction while grasping the column member 61. At this time, the support member 61 has the protrusion 61c moved from the retracted posture holding portion 63a3 of the elongated hole 63a1 to the straight portion 63a2, and the restriction of the downward movement is released. As shown in the upper part of FIG. It moves downward by its own weight. When the column member 61 moves downward, the fitting portion 61b located at the base end of the column member 61 is fitted into the column holding portion 62a of the base member 62, and the swinging of the column member 61 is restricted.
最後に、作業者は、支柱部材61を把持しながら周方向他方に回転させる。このとき、支柱部材61は、図8の下段に示すように、突起部61cが長孔63a1の直線部63a2から作業姿勢保持部63a4に移動し、上方への移動が規制される。 Finally, the worker rotates the other end in the circumferential direction while holding the support member 61. At this time, as shown in the lower part of FIG. 8, in the support member 61, the protrusion 61c moves from the straight part 63a2 of the elongated hole 63a1 to the work posture holding part 63a4, and the upward movement is restricted.
即ち、作業者は、片手で支柱部材61を操作することによって、支柱部材61を格納姿勢から作業姿勢に切り替えることが可能となる。 That is, the operator can switch the column member 61 from the retracted posture to the working posture by operating the column member 61 with one hand.
一方、墜落防止装置60を作業姿勢から格納姿勢に切り替える場合に、作業者は、まず、支柱部材61を把持し、支柱部材61を持ち上げながら周方向他方に回転させる。このとき、支柱部材61は、突起部61cが長孔63a1の作業姿勢保持部63a4から直線部63a2に移動し、図8の上段に示すように、上方への移動の規制が解除される。 On the other hand, when switching the fall prevention device 60 from the working posture to the retracted posture, the worker first holds the column member 61 and rotates the column member 61 in the other circumferential direction while lifting the column member 61. At this time, the protrusion 61c moves from the working posture holding portion 63a4 of the elongated hole 63a1 to the straight portion 63a2 in the support member 61, and the restriction on the upward movement is released as shown in the upper part of FIG.
次に、作業者は、支柱部材61を把持しながら上方に持ち上げた後に周方向一方に回転させる。このとき、支柱部材61が上方に移動すると、支柱部材61は、支柱部材61の基端に位置する嵌合部61bがベース部材62の支柱保持部62aから外れて、支柱部材61の揺動の規制が解除される。また、支柱部材61は、図7の下段に示すように、突起部61cが直線部63a2から格納姿勢保持部63a3に移動し、下方への移動が規制される。 Next, the operator lifts the strut member 61 upward while holding it, and then rotates it in one circumferential direction. At this time, when the column member 61 moves upward, the column member 61 has a fitting portion 61b located at the base end of the column member 61 disengaged from the column holding unit 62a of the base member 62, and the column member 61 swings. Regulations are lifted. Further, as shown in the lower part of FIG. 7, the protrusion 61 c moves from the straight part 63 a 2 to the storage posture holding part 63 a 3 and the downward movement of the support member 61 is restricted.
最後に、作業者は、支柱部材61を把持しながら、支柱部材61の先端を側方に向けて回転させるとともに、支柱部材61の基端側を側方に移動させる。このとき、連結部材63の連結軸63cは、図7の中段に示すように、長孔62b1に沿って移動し、図7の上段に示すように、作業位置保持部62b3から直線部62b2の下端部まで移動する。 Finally, the operator rotates the tip end of the column member 61 toward the side while holding the column member 61 and moves the base end side of the column member 61 to the side. At this time, the connecting shaft 63c of the connecting member 63 moves along the long hole 62b1 as shown in the middle part of FIG. 7, and from the work position holding part 62b3 to the lower end of the linear part 62b2 as shown in the upper part of FIG. Move to the department.
即ち、作業者は、片手で支柱部材61を操作することによって、支柱部材61を作業姿勢から格納姿勢に切り替えることが可能となる。 That is, the operator can switch the column member 61 from the working posture to the retracted posture by operating the column member 61 with one hand.
また、墜落防止装置60は、作業姿勢から格納姿勢に切り替える場合に、連結部材63が下方に移動することになるので、格納姿勢において支柱部材61の上下方向の寸法を小さくすることができる。 Further, when the fall prevention device 60 is switched from the working posture to the retracted posture, the connecting member 63 moves downward, so that the vertical dimension of the column member 61 can be reduced in the retracted posture.
このように、本実施形態の墜落防止装置によれば、支柱部材61の基端側は、ベース部材62に対する支柱部材61の揺動の規制を解除した状態において、上下方向の所定範囲内を移動可能にベース部材62に連結されており、格納姿勢において作業姿勢よりも下方に位置している。 Thus, according to the fall prevention device of the present embodiment, the base end side of the column member 61 moves within a predetermined range in the vertical direction in a state where the restriction of the swing of the column member 61 with respect to the base member 62 is released. The base member 62 is connected to the base member 62 so as to be positioned below the working posture in the retracted posture.
これにより、格納姿勢において墜落防止装置60の全体の高さ寸法を小さくすることができるので、上方への張出寸法に制限がある箇所にも墜落防止装置60を設置することができ、支柱部材61を保管する場所を別途必要とせず、支柱部材61を作業可能な状態とするための作業効率の向上を図ることが可能となる。 Thereby, since the overall height dimension of the fall prevention device 60 can be reduced in the retracted posture, the fall prevention device 60 can be installed in a place where the upward projecting dimension is limited, and the column member It is possible to improve work efficiency for making the column member 61 workable without separately requiring a place for storing 61.
また、支柱部材61は、先端部を上方に向けた状態で、支柱側連結部63aに対して上下方向に移動可能な範囲の上端側から下方に移動させることで揺動が規制され、下端側から上方に移動させることで揺動の規制が解除される。 Further, the column member 61 is controlled to swing by moving it downward from the upper end side of the range movable in the vertical direction with respect to the column side connecting portion 63a with the tip portion facing upward, and the lower end side. The movement is released from the restriction by moving it upward.
これにより、作業者による簡単な操作で支柱部材61の揺動の規制と揺動の規制の解除とを切り替えることができるので、支柱部材61の格納姿勢と作業姿勢との切り替え作業の作業効率を向上させることが可能となる。 Thereby, since it is possible to switch between swing restriction and release of the swing restriction by a simple operation by the operator, the work efficiency of switching work between the storage posture and the work posture of the pillar member 61 can be improved. It becomes possible to improve.
また、支柱部材61は、支柱側連結部63aに対して周方向に回転させることによって、移動可能な範囲の上端側から下方への移動、及び、移動可能な範囲の下端側から上方への移動が規制される。 Further, the column member 61 is rotated in the circumferential direction with respect to the column side coupling portion 63a, thereby moving downward from the upper end side of the movable range and moving upward from the lower end side of the movable range. Is regulated.
これにより、支柱部材61を上下方向に移動させるのみで、支柱部材61の揺動の規制と揺動の規制の解除とが切り替えられることはないので、作業者が意図せず支柱部材の揺動の規制と揺動の規制の解除とが切り替わることなく、安全性の向上を図ることが可能となる。 As a result, only by moving the support member 61 in the vertical direction, the restriction of the swinging of the support member 61 and the release of the control of the swinging are not switched. Therefore, the safety can be improved without switching between the regulation of the movement and the release of the regulation of the swing.
尚、前記実施形態では、墜落防止装置60を移動式クレーン1のクレーン作業に用いられるカウンタウエイト50の板状のウエイト51に設けたものを示したが、これに限られるものではない。高所作業が発生する箇所であれば、例えば、移動式クレーンの車体の上部であってもよい。また、墜落防止装置は、移動式クレーンに限られるものではなく、例えば、荷台を有するトラック車両に適用してもよい。 In the above-described embodiment, the crash prevention device 60 is provided on the plate-like weight 51 of the counterweight 50 used for the crane work of the mobile crane 1. However, the present invention is not limited to this. For example, it may be an upper part of a vehicle body of a mobile crane as long as it is a place where work at a high place occurs. Further, the crash prevention device is not limited to a mobile crane, and may be applied to, for example, a truck vehicle having a loading platform.
また、前記実施形態では、墜落防止装置60として安全帯のフックを掛けるためのフック係止部61aを有する支柱部材61を示したが、これに限られるものではない。支柱部材には、例えば、安全帯のフックを掛ける親綱を係止するための親綱係止部を有するものでもよい。 Moreover, in the said embodiment, although the support | pillar member 61 which has the hook latching | locking part 61a for hooking the hook of a safety belt as the fall prevention apparatus 60 was shown, it is not restricted to this. For example, the strut member may have a master rope locking portion for locking the master rope on which the hook of the safety belt is hung.
また、前記実施形態では、ベース部材62の案内部62bに形成された長孔62b1に沿って連結部材63を移動させることで、支柱部材61の基端側をベース部材62に対して上下方向に移動させるようにしたものを示したが、これに限られるものではない。例えば、支柱部材61とベース部材62とをリンク状の部材で連結することによって、ベース部材62に対して支柱部材61の基端側を上下方向に移動させるようにしてもよい。 Further, in the above-described embodiment, the base end side of the column member 61 is moved in the vertical direction with respect to the base member 62 by moving the connecting member 63 along the long hole 62 b 1 formed in the guide portion 62 b of the base member 62. Although what was made to move was shown, it is not restricted to this. For example, the base end side of the column member 61 may be moved in the vertical direction with respect to the base member 62 by connecting the column member 61 and the base member 62 with a link-shaped member.
50…カウンタウエイト、51…ウエイト、60…墜落防止装置、61…支柱部材、61a…フック係止部、61b…嵌合部、61c…突起部、62…ベース部材、62a…支柱保持部、62b…案内部、62b1…長孔、62b2…直線部、62b3…作業位置保持部、63…連結部材、63a…支柱側連結部、63a1…長孔、63a2…直線部、63a3…格納姿勢保持部、63a4…作業姿勢保持部、63b…ベース側連結部、63c…連結軸。 50 ... counter weight, 51 ... weight, 60 ... falling prevention device, 61 ... post member, 61a ... hook engaging portion, 61b ... fitting portion, 61c ... projection portion, 62 ... base member, 62a ... post support portion, 62b ... guide part, 62b1 ... long hole, 62b2 ... straight line part, 62b3 ... work position holding part, 63 ... connecting member, 63a ... column-side connecting part, 63a1 ... long hole, 63a2 ... straight part, 63a3 ... storage posture holding part, 63a4: working posture holding section, 63b: base side connecting section, 63c: connecting shaft.
Claims (3)
先端部に安全帯のフックまたは親綱を係止する係止部が設けられ、基端側がベース部材に対して揺動自在に連結された支柱部材と、を備え、
支柱部材は、先端部を上方に向けた状態でベース部材に対する揺動が規制された作業姿勢と、ベース部材に対する揺動の規制を解除して先端部を側方に向けた格納姿勢と、の切り替えが可能であり、
支柱部材の基端側は、ベース部材に対する支柱部材の揺動の規制を解除した状態において、上下方向の所定範囲内を移動可能にベース部材に連結されており、格納姿勢において作業姿勢よりも下方に位置する
墜落防止装置。 A base member fixed to the installation location;
A locking member that locks the hook of the safety belt or the master rope at the distal end, and a support member whose base end is swingably connected to the base member;
The support member has a working posture in which swinging with respect to the base member is restricted with the tip portion facing upward, and a retracted posture in which the restriction of swinging with respect to the base member is released and the tip portion is directed sideways. Switching is possible,
The base end side of the column member is connected to the base member so as to be movable within a predetermined range in the vertical direction in a state where the restriction of the swing of the column member with respect to the base member is released, and is lower than the working posture in the retracted posture A fall-prevention device.
連結部材は、支柱部材に連結する支柱側連結部と、ベース部材に連結するベース側連結部と、を有し、
ベース側連結部は、ベース部材に対して上下方向の所定範囲内を移動自在且つ揺動自在に連結され、
支柱側連結部は、支柱部材の基端側において、支柱部材の軸方向の所定範囲内を移動可能に連結され、
支柱部材は、先端部を上方に向けた状態で、支柱側連結部に対して上下方向に移動可能な範囲の上端側から下方に移動させることで揺動が規制され、下端側から上方に移動させることで揺動の規制が解除される
請求項1に記載の墜落防止装置。 The support member is connected to the base member via the connecting member,
The connection member has a support side connection part connected to the support member, and a base side connection part connected to the base member,
The base side connecting portion is connected to the base member so as to be movable and swingable within a predetermined range in the vertical direction.
The support column side connecting portion is connected to the base end side of the support member so as to be movable within a predetermined range in the axial direction of the support member.
The strut member is restricted from swinging by moving downward from the upper end side of the range where it can move in the vertical direction with respect to the strut-side connecting portion with the tip portion facing upward, and moves upward from the lower end side. The fall prevention device according to claim 1, wherein the restriction of swing is released.
請求項2に記載の墜落防止装置。 The column member is rotated in the circumferential direction with respect to the column-side connecting portion, so that the movement from the upper end side of the movable range to the lower side and the movement from the lower end side of the movable range to the upper side are restricted. The crash prevention device according to claim 2.
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