JP6638440B2 - Construction machinery platform - Google Patents

Description

  The present invention relates to a platform for securing an access passage in a construction machine.

  When the construction machine is, for example, a crawler crane, an upper revolving structure is mounted on a crawler-type lower traveling body so as to be pivotable about a vertical axis, and a construction machine body is configured. Necessary facilities such as (cabins), booms and winches will be installed.

  A machine room is provided in the upper swing body, and an engine, engine-related equipment, hydraulic equipment, and other equipment are installed in the machine room.

  On the other hand, platforms are provided on both left and right sides (outside of the machine room) of the upper revolving structure as passages for getting on and off the cockpit and the machine room (for example, see Patent Document 1).

  This platform is composed of a scaffold plate that extends horizontally to the outside of the main body, and a handrail that stands upright on the projecting tip side of the scaffold plate.

  The scaffolding plate is rotatable between a protruding state protruding outward with respect to the construction machine main body and a retracted state along the main body outer side about a horizontal axis along the main body outer side surface of the construction machine main body. Is provided. The support is provided at the tip of the scaffold plate so as to be rotatable around a horizontal axis.

JP 2012-202071 A

  In this conventional example, when the scaffold plate is in the retracted state along the outer surface of the main body, the handrail extends upward from the upper end after the tip side of the scaffold plate rotates upward. In other words, in the retracted state, the handrail is moved upward from the location where the scaffold plate of the construction machine body is rotatably provided to a height obtained by adding the height of the handrail to the length in the projecting direction of the scaffold plate. It will protrude.

  For this reason, the height of the construction machine to the upper end (the upper end of the handrail) at the time of transportation is increased, and the transportation is difficult.

  In view of the above, the present invention provides a platform for a construction machine which can reduce the height of a scaffold and a handrail in a stowed state and is easy to transport.

  In order to solve the above-mentioned problems, the present invention includes a scaffold having a tread surface extending outside a construction machine main body, and a handrail provided on a protruding tip side of the scaffold, and at least two handrails are provided. A platform of a construction machine in which a horizontal rod is hung between columns of the book, wherein the scaffolding part is arranged with respect to the construction machine main body around a horizontal axis along a main body outer surface of the construction machine main body. The support is rotatably provided between an overhanging state protruding outward and a storage state along the outer side surface of the main body. The scaffold portion and the handrail are provided so as to be able to be stored in the outer surface of the main body so as to be overlapped with each other in the thickness direction.

  Thereby, when transporting the construction machine, when the platform is folded and stored, the handrail can be stored at a lower position with respect to the scaffold, and the height of the scaffold and the handrail at the time of transportation is low. Transportation becomes easier.

  Further, it is preferable that a handrail holding unit that holds the handrail to the scaffold is provided in a state where the scaffold and the handrail overlap each other in the thickness direction.

  This prevents the handrail from rattling against the scaffolding during transportation of the construction machine.

  In addition, the end of the scaffold may include a holder rotatable around a horizontal axis along the outer surface of the main body, and the holder may be configured to hold the column movably in a longitudinal direction thereof. preferable.

  By simply providing such a holder, the column (handrail) can be provided so as to be rotatable about the horizontal axis and movably in the longitudinal direction, so that the configuration of the platform can be simplified and the platform can be made compact.

  Further, it is preferable that a holder angle adjusting means for adjusting the angle of the holder in the extended state is provided. Thereby, the angle of the handrail in the extended state can be adjusted to a desired angle.

  Further, it is preferable that a scaffold angle adjusting means for adjusting the angle of the scaffold in the overhang state is provided. Thereby, the angle of the scaffold in the extended state can be adjusted to a desired angle.

  Further, it is preferable that an urging member is provided for urging the scaffolding portion toward the retracted state. Accordingly, the rotation of the scaffold can be assisted by the urging of the urging member, so that the labor for storing the handrail in the construction machine or extending the handrail from the construction machine can be further reduced.

  According to the present invention, the handrail can be stored at a position lower than the scaffolding part, and the height of the scaffolding part and the handrail at the time of transportation is reduced, thereby facilitating transportation.

FIG. 1 is a side view showing an extended state of a platform of a construction machine according to a first embodiment of the present invention. FIG. 2 is a plan view showing the extended state of the above. FIG. 3 is a front view showing the extended state of the above. FIG. 4 is an enlarged plan view of a part of FIG. FIG. 5 is an enlarged front view of a part of FIG. FIG. 6 is an enlarged front view of a part of FIG. FIG. 7 is an enlarged plan view of a part of FIG. FIG. 8 is an enlarged side view of a part of FIG. FIG. 9 is a side view showing the storage state of the above. FIG. 10 is a plan view showing the storage state of the above. FIG. 11 is a front view showing the storage state of the above. FIG. 12 is an enlarged front view of a part of FIG. FIG. 13 is an enlarged front view of a part of FIG. FIG. 14 is a side view for explaining the column angle adjusting means. FIG. 15 is a front view illustrating a state in which the support is lowered with respect to the holder. FIG. 16 is a cross-sectional plan view showing a support, a holder, a handrail fixing pin, and a retaining pin. FIG. 17 is a cross-sectional plan view showing a support, a bracket, a handrail fixing pin, and a retaining pin. FIG. 18 is a front view illustrating a state in which the support is rotated with respect to the scaffold. FIG. 19 is a front view illustrating a state where the scaffold is rotated along the outer surface of the main body. FIG. 20 is a main part side view showing a state where the platform of the construction machine according to the second embodiment of the present invention is overhanging. FIG. 21 is a plan view of a main part of the above. FIG. 22 is a main part front view showing the storage state of the above.

  A platform of a construction machine of the present invention will be described based on an embodiment. The construction machine according to the following embodiment is a crawler crane.

  1st Embodiment is described based on FIGS. 1 to 8 show the extended state of the platform, and FIGS. 9 to 12 show the stored state of the platform.

  The crawler crane includes a crawler-type lower traveling body 1 as shown in FIGS. 1 to 3, and an upper revolving body 2 is mounted on the lower traveling body 1 so as to be rotatable around a vertical axis, and a construction machine body (base machine) is provided. ) A is configured.

  The upper revolving superstructure 2 is provided with a cockpit (cabin) 3, a boom (not shown), and a counterweight 4, and a machine room A1 which is covered by a guard member and is opened and closed by a door (not shown) on both left and right sides. I have. Here, for convenience, front, rear, left and right are indicated by arrows of front F, rear B, left L, and right R as shown in FIGS. FIGS. 1 to 3 and FIGS. 9 to 11 show a neutral state in which the front surface of the upper revolving unit 2 and the front surface of the lower traveling unit 1 face forward F. The upper swing body 2 is capable of swinging in a predetermined angle range (including an angle range of 360 degrees or more) clockwise and counterclockwise from the neutral state in plan view shown in FIGS. The front F, the rear B, the left L, and the right R are defined as directions with respect to the upper swing body 2 (directions viewed from the upper swing body 2). The front F is designed as a direction to which the driver turns when operating in a predetermined direction at a predetermined position in the cockpit 3.

  In the machine room A1, an engine, engine-related equipment, a hydraulic pump, a valve, and other equipment are installed, and platforms P for securing an access passage for the equipment are mounted on the left and right sides of the upper swing body 2. You. The number and positions of the platforms P provided on the construction machine are not particularly limited.

  As shown in FIG. 3, the platform P includes a scaffold 5 having a tread extending outside the construction machine main body A, and a handrail 7 provided on a protruding tip side of the scaffold 5. . In the first embodiment, the scaffold portion 5 is mainly composed of a scaffold plate 50 having a tread surface and the arm 6.

  In the first embodiment, as shown in FIG. 4, one end of the scaffold portion 5 rotates on an outer side surface (hereinafter, referred to as a main body outer side surface) 2 a of the upper revolving structure 2 below the machine room A 1. It is provided so that the other end side can rotate about the center. The outer surface 2a of the main body of the machine room A1 includes a surface facing left L and a surface facing right R, but may not be a surface facing left L and right R in particular. The scaffold plate 50 is configured by a plate having a rectangular shape that is long in the front-rear direction when viewed from above in a state where the scaffold plate 50 is extended from the construction machine body A. One scaffold plate 50 is provided for one platform P.

  The shape, material, thickness, number, and the like of the scaffold plate 50 of the present invention in plan view are not particularly limited. In addition, as the scaffold plate 50, for example, a net-like member or the like may be used instead of the plate, and a member that can form a tread surface can be appropriately used.

  In the first embodiment, as shown in FIG. 5, the arm 6 is provided on the outer surface 2a of the main body such that one end is the center of rotation and the other end is rotatable (see FIGS. 6 and 12). Can be As shown in FIG. 4, the arms 6 are provided (two in total) near one end of the platform P in the front-rear direction for each platform P. The arm 6 is formed of a rectangular beam member whose longitudinal direction is the rotational radius direction in the front view shown in FIG.

  Note that the shape, material, number, position in the platform P, and the like of the arm 6 of the present invention are not particularly limited. The shape, material, number, thickness (vertical length in FIG. 5), number of sheets, and the like of the scaffold 5 mainly composed of the arm 6 and the scaffold plate 50 are not particularly limited.

  In the first embodiment, as shown in FIGS. 5 and 6, the arm 6 moves the scaffold plate 50 so that the scaffold plate 50 is located on the upper side when the scaffold plate 50 is extended from the construction machine main body A. keeping. That is, the scaffolding plate 50 is provided on the outer surface 2a of the main body via the arm 6 such that one end is a center of rotation and the other end is rotatable. Although not shown, the scaffold plate 50 is fixed to the arm 6 by an appropriate method such as screwing or bolting, bonding, or the like, and the fixing method is not particularly limited.

  In the first embodiment, as shown in FIG. 8, the handrail 7 has a horizontal rod 14 spanned between columns 13. The column 13 is a column-shaped or cylindrical member whose longitudinal direction is the vertical direction in the extended state shown in FIG. 8, and a plurality of columns 13 are provided at intervals in the horizontal direction. The horizontal rod 14 is a member having a columnar or cylindrical shape having a horizontal direction as a longitudinal direction in a protruding state, and is provided so as to be stretched between a plurality of columns 13, and a user placed on the scaffold plate 50 falls. It is used as a handrail bar to prevent bleeding.

  In the first embodiment, the support 13 and the horizontal rod 14 are configured by cylindrical or cylindrical members. However, the support 13 and the horizontal rod 14 may not be configured by such a member. The rod 14 may be composed of a plate-shaped member. Further, a plurality of the horizontal bars 14 are provided at intervals in the vertical direction, but the number of the horizontal bars 14 is not particularly limited. In addition, although the upper horizontal rod 14 and the support 13 are formed by bending an integral columnar or cylindrical member, the separate support 13 and the horizontal support 14 may of course be connected. The shape, number, thickness (length in the left-right direction in FIG. 5) of the handrail 7 mainly composed of the columns 13 and the horizontal rods 14 are not particularly limited. The strut 13 is rotatably provided at the distal end of the scaffold 5, and will be described later.

  As shown in FIGS. 5 to 7, the bracket 8 is fixed to the outer surface 2a of the main body. In the first embodiment, as shown in FIG. 7, the bracket 8 is detachably fixed to the main body outer surface 2a by bolts 80, but may be fixed to the main body outer surface 2a by welding or the like. Is not limited to a fixing method to the construction machine main body A. Also, the shape of the bracket 8 is not limited.

  The arm 6 of the platform P is attached to a bracket 8 via a support shaft 9 which is horizontal in the front-rear direction, as shown in FIG. Although not shown, the bracket 8 and the arm 6 are respectively formed with through holes penetrating in the front-rear direction, and the support shaft 9 is inserted into the through hole in a state where these through holes communicate with each other. The support shaft 9 is mainly configured by pins, but is not limited to pins. The support shaft 9 is prevented from being removed from the through hole of the bracket 8 and the arm 6 by a pin inserted into a hole penetrating in the radial direction.

  In this manner, the state in which the scaffolding portion 5 protrudes outward with respect to the construction machine main body A about the horizontal axis (support shaft 9) along the main body outer surface 2a of the construction machine main body A, and It is provided so as to be rotatable between a stored state along the side surface 2a. The direction of the horizontal axis (support shaft 9) is preferably the horizontal direction, but the angle formed with respect to the horizontal direction falls within a predetermined angle range (for example, 3 degrees, 5 degrees, 10 degrees, etc., but is not limited). I just need. In the retracted state, the angle of the scaffold portion 5 (the scaffold plate 50 and the arm 6) is substantially perpendicular to the horizontal direction in the first embodiment, but the angle formed with respect to the horizontal direction is not particularly limited. The method of providing the scaffolding portion 5 on the construction machine main body A is not limited to such a form. For example, a form without the bracket 8 may be provided.

  In the first embodiment, the construction machine includes an overhanging state holding unit that holds the scaffolding section 5 in an overhanging state, which will be described below.

  As shown in FIGS. 6 and 12, the bracket 8 is formed with a through hole 85 for holding a scaffold, which penetrates in the front-rear direction, separately from the through hole through which the support shaft 9 is inserted. Correspondingly, the arm 6 is provided with a through-hole 66a for holding the extended state which penetrates in the front-rear direction at a position communicating with the through-hole 85 for holding the scaffolding portion of the bracket 8 in the extended state. When the scaffold 5 is in the overhanging state, the scaffold fixing pin 10 is inserted into the through holes 66a and 85 in a state where the through-hole 66a for holding the overhanging state and the through-hole 85 for holding the scaffold communicate with each other. Thus, the overhang state is maintained. Although not shown, the scaffold fixing pin 10 is prevented from being removed from the through holes 66a and 85 by a pin inserted into a hole penetrating in the radial direction. In the first embodiment, the overhanging state holding unit is configured as described above, but the overhanging state holding unit is not limited to such a form, and may use, for example, a magnet or a band.

  In the first embodiment, the construction machine includes a storage state holding unit that holds the scaffold 5 in a storage state, which will be described below.

  As shown in FIGS. 6 and 12, the arm 6 is provided with a through-hole 66b for holding the stored state that penetrates in the front-rear direction at a position communicating with the through-hole 85 for holding the scaffold portion of the bracket 8 in the stored state. Have been. In the arm 6, in the retracted state, the pin 10 for fixing the scaffold portion is inserted into the through holes 66 b and 85 in a state where the through hole 66 b for holding the stored state and the through hole 85 for holding the scaffold communicate with each other. As a result, the stored state is maintained. In the first embodiment, the storage state holding unit is configured as described above. However, the storage state holding unit is not limited to such a form, and may use, for example, a magnet or a band.

  In the first embodiment, a scaffold angle adjusting means for adjusting the angle of the scaffold 5 in the extended state is provided, and will be described below.

  As shown in FIGS. 6 and 12, the arm 6 is provided with a bolt holding piece 61 having a screw hole penetrating in the left-right direction in the extended state and projecting downward. A bolt 11 for adjusting the angle of the scaffold portion is screwed into a screw hole of the bolt holding piece 61. The head of the bolt 11 for adjusting the angle of the scaffolding portion is brought into contact with the bracket 8 so that the scaffolding portion 5 is in an extended state, and then the scaffolding plate 50 is adjusted to be horizontal.

  That is, in the first embodiment, the scaffold portion fixing pin 10 is inserted into the through holes 66a and 85 to maintain the extended state, but the outer diameter of the scaffold portion fixing pin 10 is the inner diameter of the through holes 66a and 85. Smaller, and the scaffold 5 can slightly rotate. Further, such a protruding state holding unit does not always bring the scaffolding unit 5 into a state that is sufficiently close to horizontal. Therefore, the angle of the scaffold 5 can be adjusted by moving the bolt 11 for adjusting the angle of the scaffold relative to the bolt holding piece 61 in the left-right direction. Reference numeral 12 in the drawing denotes a lock nut for fixing the position of the scaffold angle adjusting bolt 11 in a state where the scaffold angle adjusting bolt 11 is moved and adjusted with respect to the bolt holding piece 61. In the first embodiment, the scaffold angle adjusting means is configured as described above, but the scaffold angle adjusting means is not limited to such a form.

  Next, the handrail 7 will be further described. The handrail 7 is provided at the distal end of the scaffold 5 so that the column 13 can rotate around the horizontal axis and can move in the longitudinal direction of the column 13.

  In the first embodiment, the handrail 7 is attached to the arm 6 of the scaffold 5 via the holder 15, as shown in FIG. As shown in FIG. 13, the main body of the holder 15 is configured by a tube that is fitted to the support 13. As shown in FIGS. 5 and 13, the lower end of the column 13 is inserted into the holder 15 in the extended state. The support 13 is movable in the holder 15 along the longitudinal direction as shown in FIGS.

  The holder 15 is provided at the tip of the scaffold 5 so as to be rotatable around a horizontal axis (front-rear axis). In the first embodiment, as shown in FIG. 14, a through hole 6 a penetrating in the front-rear direction is formed at the tip of the arm 6. The holder 15 is formed with a through hole 15a penetrating in the front-rear direction. In a state where the through holes 6a and 15a communicate with each other, a holder support shaft 16 is inserted into the through holes 6a and 15a, and the holder 15 is provided on the arm 6 so as to be rotatable around a horizontal axis. The direction of the horizontal axis (holder support shaft 16) is preferably horizontal, but the angle formed with respect to the horizontal direction is within a predetermined angle range (for example, 3 degrees, 5 degrees, 10 degrees, etc., but is not limited). It should just fit. The holder support shaft 16 is mainly configured by pins, but is not limited to pins. Although not shown, the holder support shaft 16 is prevented from being removed from the arm 6 by a pin inserted into a hole penetrating in the radial direction.

  In this way, the handrail 7 is provided at the distal end of the scaffold 5 so that the column 13 can rotate around the horizontal axis and can move in the longitudinal direction of the column 13. In addition, how to provide the support | pillar 13 in the scaffold part 5 is not limited to such a form.

  Further, the first embodiment includes a column angle adjusting means for adjusting the angle of the column 13 of the handrail 7 in the extended state, which will be described below.

  As shown in FIGS. 13 and 14, a bracket 62 having a through-hole penetrating in the left-right direction is provided at the top of the protruding state at the tip end of the scaffold 5 (arm 6). The holder rotation fixing lever 17 is pivotally supported on a lever support shaft 18 inserted through the through hole of the bracket 62. A locking groove 17 a is formed on the tip end side of the holder rotation fixing lever 17.

  As shown in FIG. 13, the holder 15 is provided with a rod 19 having a male thread and projecting toward the bracket 8 while holding the lower end of the column 13 in the extended state. When the holder rotation fixing lever 17 rotates, the rod 19 of the holder 15 is locked or disengaged from the locking groove 17a of the holder rotation fixing lever 17. In a state where the rod 19 of the holder 15 is locked in the locking groove 17a of the holder rotation fixing lever 17, the holder rotation adjusting lever 20 and the holder fixing wing nut 21 screwed to the rod 19 are used. Between both sides. By adjusting the positions of the holder mounting adjustment nut 20 and the holder fixing wing nut 21 screwed to the rod 19, the angle of the holder 15 can be adjusted, and as a result, the column 13 (hand) held by the holder 15 can be adjusted. The angle of the sliding 7) can be adjusted.

  Thus, for example, when a plurality of platforms P are provided, it is possible to adjust the handrails 7 (the columns 13 and the horizontal rods 14) adjacent to each other in the extended state so as not to be uneven, and to have an orderly appearance. be able to. In the first embodiment, the column angle adjusting unit (directly, the holder angle adjusting unit) is configured as described above, but the column angle adjusting unit is not limited to such a form.

  As shown in FIG. 16, the handrail 7 has a through hole 15b formed in the holder 15 so that the support 13 is fixed at the uppermost position with respect to the holder 15 in the extended state shown in FIG. A handrail fixing pin 22 is inserted into a through hole 13 a formed in the support 13. The handrail fixing pin 22 is prevented from being removed from the holder 15 and the column 13 by a retaining pin 22a inserted into a hole penetrating in the radial direction shown in FIG. Reference numeral 71 in FIGS. 13 and 15 denotes a flange-shaped positioning tool that prevents the support column 13 from coming out of the holder 15 beyond the uppermost position. Further, the positioning tool 71 makes it easier for the through-hole 15b of the holder 15 and the through-hole of the column 13 to be aligned with each other, through which the handrail fixing pin 22 is inserted at the uppermost position.

  In the first embodiment, a handrail holding unit is provided for holding the handrail 7 (directly, the holder 15) with respect to the scaffold 5 in a state where the scaffold 5 and the handrail 7 overlap each other in the thickness direction. ing. As shown in FIGS. 5 and 6, a bracket 63 having a through hole 63 a penetrating in the front-rear direction is provided below the arm 6 in the extended state. The through-hole 63a (bracket 63), the through-hole 15b (holder 15), and the handrail fixing pin 22 constitute a handrail holding unit.

  Next, a procedure for storing the platform P in the construction machine body A from the extended state to the stored state will be described.

  In the extended state shown in FIG. 5, the handrail fixing pin 22 is removed from the holder 15 and the support 13.

  Thereafter, as shown in FIG. 15, the handrail 7 is lowered until the horizontal rod 14 of the handrail 7 (the lower horizontal rod 14 in the first embodiment) contacts the upper end of the holder 15.

  Then, after the holder fixing wing nut 21 of the holder 15 is loosened, the holder rotation fixing lever 17 is rotated to engage the holder rotation fixing lever 17 with the rod 19 as shown by the broken line in FIG. To release.

  Thereafter, as shown in FIG. 17, when the handrail 7 (holder 15) is tilted down and rotated so as to be positioned below the scaffolding part 5, the scaffolding part 5 and the handrailing 7 overlap each other in the thickness direction, The through-hole 63a formed in the bracket 63 of the scaffold 5 and the through-hole 13a formed in the support 13 communicate with each other. In this state, as shown in FIG. 18, the removed handrail fixing pin 22 is inserted into a through hole 63 a formed in the bracket 63 of the scaffold 5 and a through hole 13 a formed in the support 13. The handrail holding means fixes the sliding and rotation of the handrail 7 with respect to the scaffold 5.

  Thereafter, in the state shown in FIG. 17, the scaffold fixing pin 10 at the base end of the scaffold 5 is removed, and as shown in FIG. 19, the scaffold 5 and the handrail 7 are integrally turned upward by 90 degrees. Then, it is erected along the main body outer side surface 2a.

  Finally, as shown in FIG. 12, the removed scaffold fixing pin 10 is inserted into the through hole 66 b for holding the stored state of the scaffold 5 and the through hole 85 for holding the scaffold of the bracket 8, and the arm 6 And the handrail 7 is integrally fixed in the stored state. As a result, the scaffold portion 5 and the handrail 7 are stored on the outer surface 2a of the main body in a state of overlapping each other in the thickness direction.

  Next, a procedure for changing the platform P from the stored state to the extended state will be described.

  In the retracted state shown in FIG. 19, the scaffold fixing pin 10 is removed from the scaffold 5 and the bracket 8.

  Thereafter, the scaffold part 5 and the handrail 7 are integrally turned downward by 90 degrees to protrude laterally from the outer surface 2a of the main body, and as shown in FIG. 5 is inserted into the through hole 66a for holding the extended state and the through hole 85 for holding the scaffold part of the bracket 8, and the scaffold part 5 and the handrail 7 are integrally fixed in the extended state.

  Thereafter, in the state shown in FIG. 17, the handrail fixing pin 22 is detached from the bracket 63 and the column 13, and the sliding and rotation of the handrail 7 with respect to the scaffold 5 by the handrail holding means are released.

  Thereafter, as shown in FIG. 15, the handrail 7 (holder 15) is rotated upward by 90 degrees.

  Then, as shown in FIG. 13, the holder rotation fixing lever is rotated to lock the rod 19 in the locking groove 17a, and the holder mounting adjustment nut 20 and the holder fixing wing nut 21 are used. And fix it. Thus, the holder 15 and the handrail 7 are fixed in an upright state.

  Thereafter, as shown in FIG. 5, the handrail 7 is moved upward with respect to the holder 15 until the positioning tool 71 contacts the lower end of the holder 15, and the removed handrail fixing pin 22 is inserted into the through hole 13 a of the support 13. Then, the handrail 7 is fixed to the holder 15 by inserting the handrail 7 into the through hole 15 a of the holder 15.

  Thereafter, the scaffold plate 50 is adjusted with the bolt 11 for adjusting the angle of the scaffold so that the scaffold plate 50 becomes horizontal, and fixed with the lock nut 12.

  Finally, the positions of the holder mounting adjustment nut 20 and the holder fixing wing nut 21 with respect to the rod 19 are adjusted, and the angle of the handrail 7 is adjusted.

  As shown in FIGS. 1 to 3, the platform P of the first embodiment projects a scaffolding portion 5 and has a handrail 7 erected at a tip end thereof. Will be issued.

  In this state, the worker can use the platform P as an access passage at the time of maintenance of the equipment housed in the machine room A1, at the time of getting on and off the cockpit 3, and the like.

  When transporting the construction machine (crawler crane), the platform P is folded and stored. At this time, the handrail 7 can be stored at a lower position with respect to the scaffold 5 than before, and the height of the scaffold 5 and the handrail 7 during transportation (the higher height of the scaffold 5 and the handrail 7). Is low), and transportation is easy.

  Further, the handrail 7 can be set in the extended state or the retracted state only by the rotation of the arm 6 and the handrail 7 around the horizontal axis and the movement of the handrail 7 in the longitudinal direction. That is, as compared with the case where the handrail 7 is attached and detached, the operation of storing the handrail 7 in the construction machine or extending it from the construction machine can be performed easily and quickly with a small amount of labor and operation.

  Further, since the scaffold plate 50 is supported by the arm 6 projecting from the main body outer surface 2a, the bending strength in the projecting direction of the scaffold plate 50 does not need to be high, and the scaffold plate 50 does not need to have a high bending strength. Since only the strength in the direction along the horizontal direction needs to be considered, the weight of the scaffold 50 can be reduced.

  Next, a second embodiment will be described with reference to FIGS. In the following description of the second embodiment, the description similar to that of the first embodiment will be omitted, and points different from the first embodiment will be mainly described. The same components as those in the first embodiment are denoted by the same reference numerals.

  In the second embodiment, there is provided an urging member that urges the scaffold part 5 toward the storage state. More specifically, the torsion spring 23 assists the pivotal movement of the arm 6 to the stored state.

  The torsion spring 23 is wound around the support shaft 9, which is the center of rotation of the arm 6, and has both ends horizontally attached to the bracket 8 so as to urge the arm 6 with a spring force in the storage direction (the direction in which the arm 6 stands). The center portion is locked by the spring receiving portion 64 of the arm 6.

  This can further reduce the labor burden when the platform P is set in the extended state or the stored state.

  As the urging member, various springs including the torsion spring 23 and an elastic body can be appropriately used, and are not particularly limited.

  As a modification of the second embodiment, a damper with a cylinder used for a rear door of an automobile or the like may be used instead of the torsion spring 23.

  As described above, the platform P of the construction machine according to the present invention includes the scaffolding portion 5 having the tread surface extending outside the construction machine main body A, and the handrail 7 provided on the protruding tip side of the scaffolding portion 5. The handrail 7 has a horizontal rod 14 laid between at least two columns 13. The scaffolding portion 5 moves between a protruding state in which the scaffold portion 5 projects outward with respect to the construction machine main body A about the horizontal axis along the main body outer side surface 2a of the construction machine main body A and a storage state along the main body outer side surface 2a. It is provided rotatably. The support 13 is provided at the tip of the scaffold 5 so that the support 13 is rotatable around the horizontal axis and movable in the longitudinal direction of the support 13, and the scaffold 5 and the handrail 7 are mutually moved in the thickness direction. It is characterized in that it can be stored in the main body outer side surface 2a in an overlapping state.

  This allows the handrails 7 to be stored at a lower position with respect to the scaffolding part 5 when the platform P is folded and stored in transporting the construction machine, and the scaffolding part 5 and the handrails 7 during transportation are stored. Height is reduced, making transportation easier.

  In addition, it is preferable to provide a handrail holding means for holding the handrail 7 with respect to the scaffold 5 in a state where the scaffold 5 and the handrail 7 overlap each other in the thickness direction.

  Thereby, the rattling of the handrail 7 against the scaffold 5 during transportation of the construction machine is suppressed.

  In addition, a holder 15 rotatable around a horizontal axis along the main body outer surface 2a is provided at a distal end portion of the scaffold portion 5, and the holder 15 holds the column 13 movably in a longitudinal direction thereof. Is preferred.

  By simply providing such a holder 15, the support column 13 (handrail 7) can be provided so as to be rotatable around the horizontal axis and movably in the longitudinal direction, so that the configuration of the platform P can be simplified and made compact. be able to.

  Further, it is preferable to provide a holder angle adjusting means for adjusting the angle of the holder 15 in the extended state.

  Thereby, the angle of the handrail 7 in the extended state can be adjusted to a desired angle.

  Further, it is preferable to include a scaffold angle adjusting means for adjusting the angle of the scaffold 5 in the extended state.

  Thereby, the angle of the scaffold plate 50 in the extended state can be adjusted to a desired angle.

  In addition, it is preferable to include an urging member that urges the scaffold part 5 toward the storage state.

  Accordingly, the rotation of the arm 6 can be assisted by the urging of the urging member, so that the labor for storing the handrail 7 in the construction machine or extending it from the construction machine can be further reduced.

  The construction machine provided with the platform P of the present invention is not limited to a crawler crane, and is not limited to a crane. The platform P is mainly provided on a construction machine main body A including equipment requiring maintenance at a position higher than the ground, the cockpit 3 and the like. As such a construction machine, a crane, a pile driver, a power shovel, or the like including the lower traveling body 1 and the upper revolving superstructure 2 is preferably exemplified, but a construction machine other than the crane or the like may be used. In addition, the platform P of the present invention includes a construction machine including the upper swing body 2 without the lower swing body 1, a construction machine including the lower swing body 1 without the upper swing body 2, and an upper swing body 2 and the lower swing body. The present invention can be applied to a construction machine that does not include any of the bodies 1 and does not perform turning or traveling.

  Further, the platform P of the present invention may be one in which the arm 6 and the scaffold plate 50 are separately rotated with respect to the construction machine main body A. In this case, the rotation of the scaffold plate 50 with respect to the construction machine main body A may be performed by a mechanism similar to the rotation mechanism of the arm 6 with respect to the construction machine main body A shown in the first embodiment.

  Further, the platform P of the present invention may be in a use form in which the scaffold 50 is separated from the arm 6 and the handrail 7 when the handrail 7 and the arm 6 are in the retracted state.

DESCRIPTION OF SYMBOLS 1 Undercarriage 10 Scaffold part fixing pin 11 Scaffold part angle adjusting bolt 12 Lock nut 13a Through hole 13 Support post 14 Horizontal rod 15a Through hole 15b Through hole 15 Holder 16 Holder support shaft 17a Lock groove 17 Holder rotation fixing Lever 18 Lever support shaft 19 Rod 2 Upper revolving superstructure 2a Main body outer surface 20 Holder mounting adjustment nut 21 Holder fixing wing nut 22a Retaining pin 22 Handrail fixing pin 23 Torsion spring 3 Cockpit 4 Counterweight 5 Scaffold 50 Scaffold plate 6 Arm 6a Through hole 61 Bolt holding piece 62 Bracket 63 Bracket 63a Through hole 64 Spring receiving part 66a Through hole for holding extended state 66b Through hole for holding stored state 7 Handrail 71 Positioning tool 8 Bracket 80 Bolt 85 For holding scaffold part Through-hole 9 support shaft A1械室 A construction machine body P platform

Claims (6)

A scaffold having a tread surface extending outside the construction machine main body, and a handrail provided on a protruding tip side of the scaffold are provided. The handrail has a horizontal rod stretched between at least two columns. A platform of the construction machine, wherein the scaffolding portion projects outwardly with respect to the construction machine body around a horizontal axis along a body outside surface of the construction machine body, and Between the retracted state along the tread surface is provided so as to be rotatable in the thickness direction of the scaffold portion , the strut, at the tip of the scaffold portion, the strut around the horizontal axis. The handrail is provided so as to be rotatable in the thickness direction of the handrail orthogonal to the longitudinal direction of the support and the longitudinal direction of the lateral rod and to be movable in the longitudinal direction of the support, and the scaffold portion and the handrail are mutually thickened. What if the overlap in the direction Kite sliding of construction machines, characterized in that it is configured so as to store in the main body outer surface in a state along the surface opposite to the tread surface of the scaffold portion platform.   The construction machine platform according to claim 1, further comprising a handrail holding unit that holds the handrail to the scaffold in a state where the scaffold and the handrail overlap each other in a thickness direction.   At the distal end of the scaffold, a holder rotatable around a horizontal axis along the outer surface of the main body is provided, and the holder holds the column movably in a longitudinal direction thereof. The construction machine platform according to claim 1 or 2, wherein:   The construction machine platform according to claim 3, further comprising a holder angle adjusting unit that adjusts an angle of the holder in an extended state.   The platform of a construction machine according to any one of claims 1 to 4, further comprising a scaffold angle adjusting means for adjusting an angle of the scaffold in an overhang state.   The construction machine platform according to any one of claims 1 to 5, further comprising an urging member that urges the scaffolding part toward a retracted state.

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