JP4770417B2 - Construction machinery platform - Google Patents

Description

  The present invention relates to a platform for securing an access passage for equipment inspection or the like in a construction machine such as a crawler crane.

  The background art will be described using a crawler crane as an example.

  In a crawler crane, a base machine (crane body) is configured by an upper swing body mounted on a crawler type lower traveling body so as to be rotatable about a vertical axis, and a cabin, boom, winch is formed on the upper swing body of the base machine. Necessary facilities such as are installed.

  The upper swing body is provided with a machine room covered with guard members and doors on both the left and right sides, and an engine, engine-related equipment, hydraulic equipment, and other devices are installed in the machine room.

  On the other hand, platforms are provided on both the left and right sides of the upper swing body (outside the machine rooms on both sides) as a path for checking equipment and getting on and off the cabin.

  This platform is configured by a scaffold plate that extends horizontally to the outside of the main body, and a handrail that stands on the projecting tip side of the scaffold plate. Moreover, the handrail is composed of, for example, two support columns and a plurality of upper and lower recumbent bridges that are horizontally stretched between the support columns.

  Since this platform is provided so as to protrude outward from the upper-part turning body, there are cases where the vehicle width limit during transportation of the crane trailer may be exceeded in this protruding state.

  Therefore, conventionally, the handrail is removed separately or integrally with the scaffolding plate during transportation.

  In addition, in the case where the platform is configured by only a scaffolding plate without a handrail, a technique for rotating the scaffolding plate around a horizontal axis and storing it on the outer surface of the upper swing body is known (see Patent Document 1).

In addition, as a technique related to the movement of the platform with a handrail, the platform installed in front of the cabin is integrated with the handrail and the scaffolding plate and rotated 90 ° from the front of the cabin to the side around the horizontal axis. A technique for ensuring visibility is also known (see Patent Document 2).
JP 2003-147804 A JP 2003-192272 A

  However, with regard to the handling of handrails, the conventional method of attaching and detaching handrails is cumbersome and requires a lot of labor and time, and the removed handrails are transported separately from the machine body (base machine). Transportation costs are high.

  On the other hand, even if the known technique described in Patent Document 1 can be applied to the scaffolding plate, it cannot be applied to the extension / storage of the handrail, and the handrail can only be attached to and detached from the scaffolding plate.

  Further, since the known technique described in Patent Document 2 merely retracts the entire platform from the front of the cabin to the side, it can be diverted as a handrail extension / storage technique for keeping the platform within the vehicle width limit. I can't.

  As described above, conventionally, there is no technique for extending / storing the handrail, including each known technique, and handling of the handrail at the time of machine transportation has been a big problem.

  Accordingly, the present invention provides a construction machine platform that can easily and quickly extend / store a handrail.

  The invention of claim 1 is provided with a scaffold plate that extends outside the machine body, and a handrail that is provided on the distal end side of the scaffold plate, and this handrail hangs at least two struts. In a construction machine platform configured to be passed, a plurality of arms that support the scaffolding plate at a plurality of positions in the lengthwise direction with respect to the outer surface of the machine body, and an overhanging position that protrudes outward about the vertical axis The handrail support is pivotably attached to the retracted position along the outer surface of the main body, and the arm and handrail are attached to the distal end of the arm so as to be rotatable about the vertical axis. It is comprised so that it can store in.

  According to a second aspect of the present invention, in the configuration of the first aspect, the scaffolding plate is supported by the arm in a horizontal posture around the horizontal axis with respect to the lower end portion of the handrail, and the handrail in the standing posture. It is attached so as to be rotatable between the storage position along the inner side.

  According to a third aspect of the present invention, in the configuration of the first aspect, the scaffolding plate is supported by the arm in a horizontal posture around the horizontal axis with respect to the outer surface of the machine main body, and the main body outer surface in the standing posture. It is attached so that it can rotate between the storage positions along

  According to a fourth aspect of the present invention, in the configuration of the second or third aspect, a scaffold plate storing and holding means for holding the scaffold plate in the storage position is provided.

  According to a fifth aspect of the present invention, in the structure according to any one of the second to fourth aspects, a spring for biasing the scaffold plate toward the retracted position is provided at a rotation center portion of the scaffold plate.

  According to a sixth aspect of the present invention, in any one of the first to fifth aspects, the arm storing and holding means for holding the arm in the storing position is provided.

  According to a seventh aspect of the present invention, in the structure of any one of the first to sixth aspects, the bracket is detachably attached to the outer surface of the machine body, and the arm can be pivoted to the bracket between the extended position and the retracted position. It is attached.

  According to the present invention, the handrail can be extended / stored by the rotational motion about the vertical axis of the arm and the rotational motion about the vertical axis of the handrail based on the rotation of the arm.

  That is, the handrail is extended / stored only by a single rotation operation, and is rotated horizontally around the vertical axis, so that the handrail is stored and extended in the field as compared with the case where the handrail is attached / detached. It can be done easily and quickly with little effort and operation.

  Further, since the scaffold plate is supported by a plurality of arms extending from the outer surface of the main body, it is not necessary to increase the strength in the width direction of the scaffold plate, and only the strength in the length direction needs to be considered. Accordingly, since the weight of the scaffolding plate can be reduced, it is easy to handle it regardless of whether it is attached to the arm or the outer surface of the main body so as to be extended / retractable or attached / detached.

  In this case, according to the second to fifth aspects of the present invention, since the scaffold plate can be extended / stored by the rotational movement, the extension / storage operation of the entire platform can be further facilitated, and the entire platform can be transported integrally with the machine body. can do.

  In particular, according to the invention of claim 2, since the scaffolding plate can be folded on the handrail side and stored on the outer surface of the main body integrally with the handrail, the working efficiency is improved as compared with the case where both are stored separately.

  Further, according to the invention of claim 5, since the pivoting motion of the scaffolding plate can be assisted by the spring, particularly in the case of a heavy scaffolding plate such as a case where two adjacent scaffolding plates are integrated, The labor burden can be further reduced.

  On the other hand, according to the invention of claim 4, the scaffold plate can be held in the storage position by the scaffold plate holding means, and according to the invention of claim 6, the arm can be held in the storage position by the arm storage holding means. There is no fear of moving.

  By the way, the platform is transported in a state where it is stored in the machine main body in principle. However, even when the platform is stored, the vehicle width limit at the time of transport may be exceeded.

  In this case, according to the invention of claim 7, since the bracket for mounting the arm is detachably attached to the outer surface of the main body, the arm, that is, the entire platform is removed from the case, and there is no protrusion on the outer surface of the main body. State.

  In the following embodiments, a crawler crane is taken as an example of application.

1st Embodiment (refer FIGS. 1-10)
1 to 5 show the platform overhanging state, and FIGS. 6 to 10 show the storage state.

  The crawler crane includes a crawler type lower traveling body 1 as shown in FIGS. 1 and 6, and an upper revolving body 2 is mounted on the lower traveling body 1 so as to be able to swivel around a vertical axis. A is configured.

  The upper swing body 2 is provided with a cabin 3, a boom (not shown), and a counterweight 4, and machine rooms B that are covered with a guard member and opened and closed by a door (not shown) are provided on both the left and right sides.

  In this machine room B, an engine, engine-related equipment, a hydraulic pump, a valve, and other devices are installed, and platforms P for securing an access passage for these devices are mounted on the left and right sides of the upper swing body 2. The

  As shown in FIG. 5 and the like, the platform P includes a scaffolding plate 5 having a rectangular shape in plan view that projects from an outer surface (hereinafter referred to as a main body outer surface) 2a below the machine room in the upper swing body 2, and the scaffolding plate 5. The arm 6 is supported from below at a plurality of locations in the length direction (two locations in the illustrated example), and a handrail 7 is erected on the extending end side of the scaffold plate 5.

  In this embodiment, the case where two front and rear platforms P and P are arranged in parallel on the left and right sides with the end faces of the respective scaffolding plates 5 and 5 in contact with each other is illustrated.

  As shown in FIG. 5 and the like, the arm 6 of the platform P is attached via an arm support shaft (vertical axis) 9 perpendicular to a bracket 8 detachably bolted to the main body outer surface 2a. 1 to FIG. 5 and a projecting position projecting outward as shown in FIGS. 1 to 5, and as shown in FIG. 6 to FIG. It can move between the storage positions along.

  In the overhanging state, the base end portion of the arm 6 is fixed to the bracket 8 with a bolt 10 (see FIG. 5), and thereby the arm 6 is fixed to the overhanging position.

  As shown in FIGS. 5, 9, and 10, an inverted L-shaped slide hook 11 is provided on the base end side of the arm 6 and a hook hook 12 is provided on the outer side surface 2a of the main body as arm storing and holding means. The hook 11 is hooked on the hook hook 12 by a series of operations of ascending, turning around the vertical axis, and descending. Accordingly, the arm 6 is fixed at the retracted position so that the arm 6 does not shake or rotate to the overhanging side during transportation.

  A magnet, a band, or the like may be used instead of the bolting and hook structure as a holding means at both the extended and retracted positions of the arm 6.

  In this embodiment, the handrail 7 is constituted by two front and rear columns 13 and 13 and two upper and lower horizontal rails 14 and 14 spanned between the columns 13 and 13 as shown in FIG. As shown in FIGS. 4 and 5 and the like, the lower ends of both struts 13 and 13 are supported in a state of penetrating vertically through the distal ends of the arms 6 and 6.

  For simplification of the figure, the reference numerals of the support column 13 and the horizontal bar 14 are attached only to FIGS.

  As a result, both the struts 13 and 13 are attached to the front end portions of the arms 6 and 6 so as to be rotatable around the vertical axis (the center of the strut) Y. , 6 and a protruding position (see FIGS. 1 to 5) protruding from the outer surface 2a of the main body and a retracted position (see FIGS. 6 to 10) along the outer surface 2a of the main body. Yes.

  As shown in FIG. 5 and the like, the scaffold plate 5 has an end portion on the overhanging side (right side in FIG. 5) connected to the lower end portion of the handrail support column 13 by a horizontal shaft 15. As shown by the solid line, it can rotate between the overhanging position that is placed and supported on the arm 6 in the horizontal state and the retracted position along the inside of the handrail 7 in the standing state as shown by the two-dot chain line. It has become.

  As a means for holding the scaffold plate 5 in the retracted position, an inverted L-shaped slide hook 16 is provided on the upper portion of the handrail support column 13 as shown in FIGS. The slide hook 16 is hooked on the upper end portion of the scaffolding plate 5 in the retracted state by a series of operations of ascending, rotating and descending. Thereby, the scaffold board 5 is hold | maintained at the handrail 7 so that it may not shake or rotate at the time of transport.

  In addition, as shown in FIG. 8, it is desirable to provide a cushioning material 17 at an appropriate position on the back side of the scaffolding plate 5 so as not to damage the main body outer surface 2a by the scaffolding plate 5 in the retracted state.

  In the above configuration, the platform P has an upper revolving body in a state where the arms 6 and 6 are extended as shown in FIGS. 1 to 5, the handrail 7 is raised at the tip, and the scaffold plate 5 is placed on the arm. 2 is projected on both the left and right sides.

  In this state, the worker can use the platform P as an access passage when maintaining the equipment accommodated in the machine room B, when getting on and off the cabin 3, and the like.

  In this extended state, the arms 6 and 6 are fixed by the bolts 10 shown in FIG. 5, and the handrail 7 is also fixed at the extended position by fixing the arms 6 and 6. The scaffold plate 5 is fixed to the arms 6 and 6 by bolts and nuts (not shown), and can be connected by bolts and nuts (not shown) at the end surfaces where the scaffold plates 5 and 5 of the front and rear platforms are in contact with each other. .

  On the other hand, when the platform P exceeds the vehicle width limit during transportation of the crane, the platform P can be folded and stored as shown in FIGS.

  In this case, as shown by a two-dot chain line in FIG. 5, the scaffold plate 5 is raised and rotated around the horizontal axis 15 to be stored and held inside the handrail, and then the arm 6 and the handrail 7 are moved. It only needs to be rotated about 90 ° rearward around the vertical axis (arm support shaft 9, column center Y), and stored and held on the outer surface 2a of the main body.

  Further, overhanging after transportation can be performed by the reverse operation.

  In other words, according to this platform P, the handrail 7 is moved only by the rotational movement of the arm 6 around the vertical axis and the rotational movement of the handrail 7 around the vertical axis based on the rotation of the arm 6. Can be extended / stored.

  Therefore, the overhanging / storing operation can be efficiently performed in a short time with less labor and operation as compared with the conventional case of attaching and detaching the handrail.

  Moreover, in this embodiment, the scaffold plate 5 can also be extended / stored by the rotational movement with respect to the handrail 7, and the scaffold plate 5 can be folded on the handrail 7 side and stored together with the handrail 7 on the main body outer surface 2 a. Further, the efficiency of the overhanging / storing operation of the entire platform P can be further increased, and the entire platform P can be transported as a unit with the base machine A (the upper revolving structure 2 when transported in the vertical direction).

  Further, since the arm 6 and the scaffolding plate 5 can be held in the retracted positions by the slide hooks 11 and 16, respectively, there is no possibility that they are rotated to the overhanging side during transportation.

  Further, since the scaffold plate 5 is supported by the two arms 6 and 6 extending from the outer surface 2a of the main body, it is not necessary to increase the strength in the width direction of the scaffold plate 5, only the strength in the length direction. You should consider it. Therefore, since the scaffold board 5 can be reduced in weight, handling including the overhang / storage is facilitated.

  If the vehicle width limit during transportation is exceeded even when the platform is stored, the arm mounting bracket 8 (see FIG. 5) can be removed from the outer surface 2a of the main body to remove the entire platform and transport it separately. it can.

Second embodiment (see FIGS. 11 and 12)
Only differences from the first embodiment will be described.

  As shown in FIGS. 1 and 2, etc., the scaffold plates 5 and 5 of the platforms P and P adjacent to each other in the front and rear are connected to each other in the overhanging state as described above, and can be separated during storage. These may be stored together while being connected. Or you may comprise both the scaffolding plates 5 and 5 as integral.

  However, this increases the weight of the scaffolding plate, which increases the labor burden on the worker during overhanging / storage.

  Further, even when the scaffolding plates 5 and 5 of both platforms P and P are separately extended / stored as in the first embodiment, the horizontal posture is changed to the standing posture although the weight is reduced as compared with the conventional one. The pivoting operation requires a lot of labor.

  Thus, in the second embodiment, the torsion spring 18 assists the rotational movement of the scaffold plate 5 toward the storage side.

  The torsion springs 18 are wound around spring support shafts 19 attached to a plurality of positions in the length direction of the scaffolding plate 5 on the axis of the horizontal shaft 15 that is the rotation center of the scaffolding plate 5 and stored in the scaffolding plate 5 (standing up). The one end is locked to the scaffolding plate 5 and the other end is locked to the spring receiver 20 spanned between the handrail struts so as to bias the spring force in the direction).

  With this configuration, it is possible to further reduce the labor burden when the scaffold plate 5 is extended / stored.

  Instead of the torsion spring 18, a cylinder-equipped damper used for a rear door of an automobile or the like may be used.

Third embodiment (see FIG. 13)
In both the first and second embodiments, the scaffolding plate 5 is attached to the handrail 7 so that it can be extended / stored, whereas in the third embodiment, the scaffolding plate 5 is centered on the outer surface 2a of the main body with the horizontal axis 15 as the center. It is attached as an overhang / storable.

  Even in such a case, the extension / storage operation of the scaffold plate 5 can be facilitated, and the basic effect that the entire platform including the scaffold plate 5 can be transported integrally with the machine body can be obtained.

  In addition, the structure which provides the torsion spring 18 of 2nd Embodiment is applicable also in this 3rd Embodiment.

  By the way, it is desirable that the scaffold plate 5 is configured to be able to be extended / stored with respect to the handrail 7 or the main body outer surface 2a as in the above embodiment, but this scaffold plate 5 is detachable and is removed when the platform is stored. You may make it hold | maintain to the main body outer surface 2a in a standing state.

  In the above embodiment, the arm 6 and the handrail 7 are configured to rotate backward during storage, but may be rotated forward.

  Furthermore, the present invention can be applied not only to a crawler crane, but also to a trolley-mounted crane, a pile driver, a crusher, and the like.

It is a side view of the extended state of the platform concerning a 1st embodiment of the present invention. It is the same top view. It is the same front view. FIG. 2 is a partially enlarged view of FIG. 1. FIG. 4 is a partially enlarged view of FIG. 3. It is a side view of a platform storing state. It is the same top view. FIG. 8 is a partially enlarged view of FIG. 7. It is the figure which expanded a part of FIG. 8 further. FIG. 10 is an enlarged sectional view taken along line XX in FIG. 9. It is a partially expanded side view of the overhang | projection state of the platform concerning 2nd Embodiment of this invention. It is the XII-XII line expanded sectional view of FIG. FIG. 6 is a view corresponding to FIG. 5 of a platform according to a third embodiment of the present invention.

Explanation of symbols

A Crane base machine (machine body)
1 Lower traveling body constituting the base machine 2 Upper revolving body 2a Outer surface of upper revolving body (main body outer surface)
P Platform 5 Platform scaffolding plate 6 Same arm 7 Same handrail 8 Bracket for attaching arm to outer surface of main body 9 Same arm support shaft (vertical axis)
DESCRIPTION OF SYMBOLS 11 Slide hook as arm storage holding means 12 Hook hook 13 Support pillar which comprises handrail 14 Same horizontal arm 15 Horizontal axis | shaft which attaches scaffold board to handrail 16 Slide hook as scaffold board storage holding means 18 Scaffold board storage position Torsion spring biased toward

Claims (7)

  A construction machine comprising a scaffolding plate extending outside the machine body and a handrail provided at the leading end side of the scaffolding plate, and the handrail is constructed by spanning at least two struts. A plurality of arms for supporting the scaffolding plate at a plurality of positions in the longitudinal direction with respect to the outer surface of the machine body, with the overhanging position projecting outward from the vertical axis, and a storage position along the outer surface of the body The handrail strut is attached to the tip of the arm so as to be rotatable about the vertical axis, and the arm and handrail can be stored on the outer surface of the machine body. Construction machine platform characterized by that.   The scaffolding plate is attached to the lower end of the handrail so that it can rotate between the extended position supported by the arm in a horizontal position and the retracted position along the inside of the handrail in a standing position around the horizontal axis. The construction machine platform according to claim 1.   The scaffolding plate is attached to the outer surface of the machine body so as to be pivotable between the extended position supported by the arm in a horizontal posture and the retracted position along the outer surface of the main body in a standing posture around the horizontal axis. The construction machine platform according to claim 1.   4. The construction machine platform according to claim 2, further comprising scaffold plate storage and holding means for holding the scaffold plate in the storage position.   The construction machine platform according to any one of claims 2 to 4, wherein a spring for urging the scaffold plate toward the retracted position is provided at a rotation center portion of the scaffold plate.   6. The construction machine platform according to claim 1, further comprising arm storage holding means for holding the arm in a storage position.   The bracket is detachably attached to the outer surface of the machine body, and the arm is attached to the bracket so as to be rotatable between an extended position and a retracted position. Construction machinery platform.

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