JP6086128B2 - Work machine - Google Patents

Description

  The present invention relates to a work machine such as a crawler crane in which an auxiliary platform is provided on a side surface of an upper body.

  As a method of attaching an auxiliary platform serving as a scaffold on which an operator is placed to an upper main body of a work machine such as a crawler crane, there is one described in Patent Document 1 below. The prior art is configured as follows. A bed side bracket is fixed with a bolt to the lower surface of a frame member constituting a frame which is a part of the upper body, and a step is detachably attached to the bed side bracket via the step side bracket. The side surface of the bed side bracket has a shape and dimensions that do not protrude from the side surface of the frame member.

  According to the above configuration, when disassembling the work machine and transporting the upper body mounted on the trailer, the width of the upper body can be minimized by removing the step side bracket and the step (parts related to the step). Does not protrude from the side of the upper body (the transport width limit can be observed)).

JP2013-75728A

  The above prior art has the following problems. Since it is necessary to secure a space for attaching the bed side bracket to the lower surface of the upper body, this limits the layout of the equipment. In the case of a work machine in which the upper body turns such as a crane and an excavator, the space of the bed side bracket must be secured on the lower surface side of the upper body over the entire range in which the bed side bracket turns.

  The present invention has been made in view of the above circumstances, and the object thereof is not to sacrifice the space on the lower surface side of the upper body, and the auxiliary platform related parts do not protrude from the side surface during transportation of the upper body. It is to provide a work machine provided with an auxiliary platform mounting structure that can be configured.

  The working machine according to the present invention includes a first overhanging portion projecting downward, an upper main body provided with a second overhanging portion projecting upward, and the first overhanging portion and the first overhanging portion. And an auxiliary platform having an attachment portion fitted into the second overhang portion at the end. The attachment portion is provided with a first locking portion extending upward and provided with a second locking portion having a notch-shaped portion below the first locking portion. In the auxiliary platform, the upper end portion of the first locking portion abuts on the back surface of the first overhanging portion, and the notch shape of the second locking portion is formed on the front side surface and the upper surface of the second overhanging portion. It has the structure which the inner surface of a part contact | abuts.

  The work machine according to the present invention may be configured as follows. A first overhanging portion projecting downward and a second overhanging portion projecting upward; the upper main body provided on a side surface; the side surface of the upper main body; and the first overhanging portion and Auxiliary platform having an abutment portion provided at the turning center side of the upper body with respect to the second overhanging portion, and an attachment portion fitted into the first overhanging portion and the second overhanging portion at the end. And a work machine comprising: The attachment portion is provided with a first locking portion extending upward and provided with a second locking portion below the first locking portion. In the auxiliary platform, an upper end portion of the first locking portion is in contact with a back surface of the first overhanging portion, and a lower surface of the second locking portion is in contact with an upper surface of the second overhanging portion, and The back surface of the second locking portion is in contact with the contact portion.

  According to the present invention, when the work machine is disassembled and the upper main body is mounted on a trailer or the like and transported, the auxiliary platform is removed from the first overhanging portion and the second overhanging portion provided on the side surface of the upper main body. Thus, there is no auxiliary platform protruding from the side surface of the upper body. That is, it is possible to prevent the auxiliary platform related parts from protruding from the side surface when the upper body is transported. In addition, since the auxiliary platform related parts are not attached to the lower surface side of the upper body, the lower surface side space of the upper body is not sacrificed by the auxiliary platform related parts.

It is a top view which shows a part of crawler crane with which the auxiliary | assistant platform which concerns on one Embodiment of this invention was attached. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is CC sectional drawing of FIG. It is a figure corresponding to FIG. 2 which shows the state which stored the platform main body. It is a figure which shows the attachment method of an auxiliary platform. It is a figure which shows the removal method of an auxiliary | assistant platform.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In addition, as a work machine which can apply the auxiliary platform in this invention, it is mounted in a crawler crane (crawler type mobile crane), a wheel crane (wheel type mobile crane), a fixed crane (for example, a work ship). Cranes) and container cranes.

(Example of auxiliary platform placement)
First, an arrangement example in the crawler crane of the auxiliary platforms 1 and 31 according to the embodiment of the present invention will be described with reference to FIG.

  FIG. 1 shows a part of the upper body constituting the crawler crane 100. The decks 51 and 52 (the right deck 51 and the left deck 52) are fixed to both sides of a turning frame 50 as a main frame to which a boom (not shown), a gantry (not shown) and the like are attached. On the decks 51 and 52, a cab (not shown), an engine (not shown), and the like are mounted. The revolving frame 50 and the decks 51 and 52 are a part of the upper body constituting the crawler crane 100. In FIG. 1, the front-rear direction and the left-right direction of the crawler crane 100 are indicated by arrows.

  As shown in FIG. 1, in the crawler crane 100 of the present embodiment, a plurality of auxiliary platforms 1 are attached to the side surface of the left deck 52, and a plurality of auxiliary platforms 31 are attached to the side surface of the right deck 51. The auxiliary platforms 1 and 31 may be attached to the front and rear side surfaces of the decks 51 and 52 instead of the left and right side surfaces of the decks 51 and 52, and the auxiliary platform 1 is attached to the front and rear side surfaces of the revolving frame 50. 31 may be attached.

(Hole provided on the side of the deck)
A plurality of holes 53 for attaching the auxiliary platforms 1 and 31 are provided on the side surfaces of the decks 51 and 52, respectively. The structure of the hole 53 will be described. For example, as shown in FIG. 2, a hole 53 is formed in the frame member 52 a constituting the left deck 52, and a plate member 54 serving as a first projecting portion that projects downward is formed above the hole 53. Is fixed to the inner surface of the frame member 52a. In addition, a plate member 55 as a second overhanging portion that projects upward is disposed below the hole 53 by being fixed to the inner surface of the frame member 52 a via the plate member 56. The lower end surface of the plate member 54 and the upper end surface of the plate member 55 are both horizontal and flat surfaces. A bottom plate 57 is provided on the back side of the plate member 54 and the plate member 55.

  In the present embodiment, the bottomed hole 53 having the bottom plate 57 (the contact portion provided on the turning center side of the upper main body with respect to the plate member 54 and the plate member 55) is provided, but the bottom plate 57 is omitted. (The bottom plate 57 may be omitted). FIG. 3 shows a hole 53 provided in the frame member 51 a constituting the right deck 51. The hole 53 provided in the side surface of the left deck 52 and the hole 53 provided in the side surface of the right deck 51 have the same structure.

(Auxiliary platform configuration)
Next, the configuration of the auxiliary platform 1 will be described with reference to FIGS. The auxiliary platform 1 includes a platform main body 2 and a mounting bracket 3 as a mounting portion that is rotatably attached to a base end portion of the platform main body 2 via a bolt 16 as a rod-shaped member. Note that at least two mounting brackets 3 are provided at a predetermined interval with respect to one auxiliary platform 1 (the same applies to a main body plate 5 (and auxiliary plate 6) and a lifting prevention bracket 4 described later).

<Platform body>
The platform body 2 includes a triangular (see FIG. 2) body plate 5, an L-shaped auxiliary plate 6 (see FIG. 4) fixed to the side surface of the body plate 5, and the body plate 5 and the auxiliary plate. The top plate 7 (step) is supported by the main body plate 5 and the auxiliary plate 6 by being fixed to the upper surface of 6.

  2, 4, and 5 and the auxiliary platform 31 shown in FIG. 3 are only platform main body 2 (32), and the difference is in both side surfaces of main body plate 5. The difference is only on which surface the auxiliary plate 6 is fixed. That is, except for the above-described arrangement of the auxiliary plate 6 with respect to the main body plate 5, the side sectional view of the auxiliary platform 1 shown in FIG. 2 viewed from the opposite side (from the rear side toward the front side) is shown in FIG. This is the same as a side sectional view of the platform 31. Therefore, in order to describe the auxiliary platform 1, the auxiliary platform 31 shown in FIG. The description of the auxiliary platform 1 is also the description of the auxiliary platform 31. Note that, regarding the auxiliary platform 1 and the auxiliary platform 31, the same or similar members are denoted by the same reference numerals.

  As shown in FIG. 2, a long hole 5 a into which the bolt 16 is inserted is provided on the base end side of the main body plate 5, and a long hole 6 a having the same shape and the same size as the long hole 5 a is also provided in the auxiliary plate 6. Is provided. Further, the angle adjusting member 18 of the platform body 2 is fixed to the lower ends of the body plate 5 and the auxiliary plate 6. The angle adjusting member 18 includes a fixing member 19 that is fixed to the main body plate 5 and the auxiliary plate 6, a nut 20 that is fixed to the fixing member 19 by welding, and a bolt 21 that is screwed to the nut 20. The level of the top plate 7 is adjusted by adjusting the amount of protrusion of the bolt 21 from the nut 20.

<Mounting bracket>
The mounting bracket 3 has a first locking portion 8 extending upward and a second locking portion 9 provided below the first locking portion 8. As for the front-end | tip part of the 1st latching | locking part 8, the surface on the side contact | abutted to the board member 54 is made into the flat surface, and the surface on the opposite side is made into the taper curved surface. The 2nd latching | locking part 9 has the groove-shaped notch part 10 (notch shape part) opened toward the downward direction, This notch part 10 is 1st surface 10a, 2nd surface 10b, 3rd. It has the surface 10c (in this embodiment, a total of three surfaces). In the state where the mounting bracket 3 is attached, the first surface 10a and the third surface 10c are vertical surfaces extending in the vertical direction, and the second surface 10b is a horizontal surface.

  In addition, a circular hole 3a into which the bolt 16 is inserted is provided on the base end side of the mounting bracket 3, and a circular hole 3b into which the storage pin 23 is inserted is provided below the hole 3a. A contact portion 22 with which the bolt 21 of the angle adjusting member 18 contacts is provided below the hole 3b. Note that the center of the hole 3 a is shifted from the center of gravity of the mounting bracket 3 so that the mounting bracket 3 can rotate by its own weight around the bolt 16. Moreover, the front-end | tip part (upper end part) of the 1st latching | locking part 8 is located above the center of the hole 3a, and the notch part 10 of the 2nd latching | locking part 9 is located below rather than the center of the hole 3a. As shown in FIG. 3, the storage pin 23 is attached to the main body plate 5, and a retaining treatment is performed by the pin 24.

  The base end portion of the mounting bracket 3 is inserted between the main body plate 5 and the auxiliary plate 6 arranged with a space between the platform main body 2, and then the long holes 5 a and 6 a of the plates 5 and 6, and the mounting bracket The platform body 2 and the mounting bracket 3 are rotatably fixed to each other by inserting the bolts 16 into the holes 3a and tightening the nuts 17.

<Floating prevention bracket>
The auxiliary platform 1 further includes an anti-lifting bracket 4 for preventing the auxiliary platform 1 from floating when attached to the side surface of the left deck 52.

  The anti-lifting bracket 4 includes a main body plate 11 (see FIG. 2) and an auxiliary plate 12 having an L shape (see FIG. 4) in a plan view and fixed to the side surface of the main body plate 11. The body plate 11 constituting the lifting prevention bracket 4 is provided with a recess 4 a that engages with the lower end of the plate member 54 at the upper end, and the lifting prevention bracket 4 is attached to the mounting bracket 3 by the mounting pins 14. Pinned. The mounting pin 14 is provided with a pin 15 to prevent it from coming off.

  A contact plate 13 is disposed in the recess 4a as shown in FIG. The abutment plate 13 is arranged so as to span between the main body plate 11 and the auxiliary plate 12 arranged with a space therebetween, and is fixed to the plates 11 and 12. As shown in FIG. 3, the upper end surface of the main body plate 11 (the upper end surface of the recess 4a) is made higher than the upper end surface of the auxiliary plate 12, and the upper end surface of the auxiliary plate 12 and the upper surface of the contact plate 13 Are flush with each other (the height is adjusted), and the contact plate 13 is horizontally arranged.

(Auxiliary platform storage)
The posture of the auxiliary platform 1 (platform main body 2) shown in FIG. 2 is a posture when the auxiliary platform 1 is used. When the auxiliary platform 1 is not used, the auxiliary platform 1 can be removed from the left deck 52, as will be described later. However, for example, when the upper body is stored, the auxiliary platform 1 ( The platform body 2) can be in the storage posture shown in FIG. 5 (can be stored).

  From the state shown in FIG. 2, the platform body 2 is rotated about 90 ° around the bolt 16 (with the bolt 16 as the rotation center) and is shifted downward by the length of the long holes 5 a and 6 a, thereby Let it be the state standing with respect to the mounting bracket 3. Then, the storage pin 23 is inserted into the long holes 5a and 6a of the aligned plates 5 and 6 and the hole 3b of the mounting bracket 3, and the pin 24 for retaining is inserted into the storage pin 23, thereby the platform. The main body 2 is fixed. As a result, the auxiliary platform 1 (platform main body 2) is stored.

(Auxiliary platform mounting method)
A method of attaching the auxiliary platform 1 to the side surface of the deck will be described with reference to FIG.

  The mounting bracket 3 of the auxiliary platform 1 from the first locking portion 8 while the curved surface portion at the tip of the first locking portion 8 of the mounting bracket 3 is applied to the lower edge of the hole 53 provided in the side surface of the left deck 52. Is inserted into the hole 53 (FIG. 6A). Then, the auxiliary platform 1 is rotated around the first locking portion 8 (FIG. 6B). If the upper end part of the 1st latching | locking part 8 contact | abuts to the back surface of the board member 54, the auxiliary | assistant platform 1 will be lowered | hung and the notch part 10 of the 2nd latching | locking part 9 will be fitted in the board member 55 (FIG. 6C). Thereby, the upper end part of the 1st latching | locking part 8 contact | abuts to the back surface of the board member 54, and the 1st surface 10a and the 2nd surface 10b of the notch part 10 of the 2nd latching | locking part 9 are respectively board | plates. It abuts on the front side surface and the upper surface of the member 55. Next, the concave portion 4a of the lifting prevention bracket 4 is engaged with the lower end portion of the plate member 54 (FIG. 6D), and the lifting prevention bracket 4 is pinned to the mounting bracket 3 with the mounting pin 14 and the pin 15 (stopping prevention). (FIG. 6E).

  When a person gets on the top plate 7 of the auxiliary platform 1, a vertical downward force and a moment due to the distance from the platform mounting portion to the person's stepping position are generated. The vertically downward force is received by the second surface 10 b of the notch 10. The moment is received by contact between the plate member 54 and the first locking portion 8 and contact between the plate member 55 and the first surface 10 a of the notch portion 10.

  In addition, by inserting the 1st latching | locking part 8 of the mounting bracket 3 diagonally with respect to the hole 53 (by setting the angle which inserts diagonally as much as possible), it can be set as the small hole 53, thereby It is easy to secure the strength of the deck.

(How to remove the auxiliary platform)
The mounting pins 14 and 15 that connect the lifting prevention bracket 4 and the mounting bracket 3 are removed (FIG. 7A), and the lifting prevention bracket 4 is removed (FIG. 7B). Then, the platform body 2 is rotated about 85 ° around the bolt 16 (FIG. 7C). Next, the platform body 2 is lifted obliquely upward in a direction away from the side surface of the left deck 52, and the fitting of the notch portion 10 of the second locking portion 9 into the plate member 55 is removed (FIG. 7D). When the fitting of the notch 10 into the plate member 55 is released, the mounting bracket 3 rotates around the bolt 16 by its own weight, and thereby is removed from the hole 53 (FIG. 7E).

(Action / Effect)
According to the auxiliary platforms 1 and 31 according to the present invention, when the crawler crane 100 is disassembled and the upper body is mounted on a trailer or the like and transported, the holes 53 provided on the side surfaces of the upper body (deck 52 and 51) are provided. (In other words, from the plate member 54 and the plate member 55), the auxiliary platforms 1 and 31 are removed to eliminate the auxiliary platform protruding from the side surface of the upper body. That is, it is possible to prevent the auxiliary platform related parts from protruding from the side surface when the upper body is transported. In addition, since the auxiliary platform related parts are not attached to the lower surface side of the upper body, the lower surface side space of the upper body is not sacrificed by the auxiliary platform related parts.

  Further, as shown in FIG. 5, when the auxiliary platform is not used, the platform body 2 is turned upright with respect to the mounting bracket 3 by rotating the platform body 2 around the bolt 16, and in this standing state, the platform The main body 2 and the mounting bracket 3 are fixed by the storage pin 23. According to this, for example, when the upper platform is stored and the auxiliary platforms 1 and 31 are not particularly removed from the upper body, the platform body 2 is erected with respect to the mounting bracket 3. By doing so (storage of the auxiliary platform), the protruding amount of the auxiliary platforms 1 and 31 from the side surface of the upper body can be suppressed.

  Further, in the auxiliary platforms 1 and 31 of the present embodiment, the center of the hole 3a provided in the mounting bracket 3 into which the bolt 16 is inserted deviates from the center of gravity of the mounting bracket 3 so that the mounting bracket 3 can rotate by its own weight. It is considered to be a position. According to this configuration, as shown in FIG. 7E, the mounting bracket 3 rotates by its own weight, so that the auxiliary platforms 1 and 31 can be removed smoothly.

  Further, the auxiliary platforms 1 and 31 of the present embodiment further include a lifting prevention bracket 4 pinned to the mounting bracket 3, and a recess 4 a formed in the lifting prevention bracket 4 is engaged with the lower end portion of the plate member 54. At the same time, the lifting prevention bracket 4 is pinned to the mounting bracket 3 attached to the side surfaces of the decks 52 and 51 to prevent the auxiliary platforms 1 and 31 from rising.

  According to this configuration, when a person steps on the protruding portion from the side of the upper main body of the auxiliary platform 1 or 31 when a person gets on the protruding portion, the crawler crane 100 to which the auxiliary platform 1 or 31 is attached is disposed on a rough ground. When traveling, it is possible to prevent the auxiliary platforms 1 and 31 from being detached from the side surface of the upper body due to impact, vibration, or the like.

(Modification)
In the said embodiment, although the notch part 10 of the 2nd latching | locking part 9 is made into the U shape (groove shape) which has the 1st surface 10a, the 2nd surface 10b, and the 3rd surface 10c, it replaces with this, It is good also as an L-shaped notch part (notch shape part) which has only two surfaces orthogonal to each other called the 1st surface 10a and the 2nd surface 10b. That is, the third surface 10c may be omitted. However, the U-shaped (groove-shaped) notch 10 having the third surface 10c as in the present embodiment makes the mounting bracket 3 more difficult to remove, and the shape and dimensions of the mounting bracket 3 are designed. Cheap.

  Furthermore, it is not necessary to provide a notch in the second locking portion 9. The lower surface of the second locking portion 9 comes into contact with the upper surface of the plate member 55 (second overhanging portion), and the back surface of the second locking portion 9 contacts the bottom plate 57 (bottom surface) of the hole 53 provided in the upper body. This is because the above-described vertical downward force and moment can be received as long as they are in contact with each other. In this case, the bottom plate 57 is also a strength member (a member that can withstand a moment).

  In the above-described embodiment, the contact plate 13 is disposed in the recess 4a of the lifting prevention bracket 4. However, the contact plate 13 may be omitted. However, if the abutment plate 13 is provided, the abutment plate 13 hits the flat and horizontal surface of the plate member 54 (first overhanging portion) when the auxiliary platforms 1 and 31 are lifted. The floating of the platforms 1 and 31 is further prevented. Further, the lifting prevention bracket 4 itself may be omitted.

  Regarding the platform body 2, the auxiliary plate 6 described above may be omitted. Further, the auxiliary plate 12 described above may be omitted with respect to the lifting prevention bracket 4. Further, the platform body 2 and the mounting bracket 3 may be integrated.

  The embodiment of the present invention and its modifications have been described above, but it goes without saying that various modifications can be made within the scope that can be assumed by those skilled in the art.

1: Auxiliary platform 2: Platform body 3: Mounting bracket (mounting part)
4: Lifting prevention bracket 4a: Recessed portion 7: Top plate 8: First locking portion 9: Second locking portion 10: Notched portion (notched portion)
23: Storage pin 14: Mounting pin 16: Bolt (bar-shaped member)
51: Right deck (part of the upper body)
52: Left deck (part of the upper body)
53: Hole 54: Plate member (first overhanging portion)
55: Plate member (second overhang)
100: Crawler crane (work machine)

Claims (6)

An upper body having a first overhanging portion projecting downward and a second overhanging portion projecting upward;
An auxiliary platform having an attachment portion at an end to be fitted into the first overhanging portion and the second overhanging portion;
With
The attachment portion is provided with a first locking portion that extends upward, and a second locking portion having a notch-shaped portion below the first locking portion,
In the auxiliary platform, the upper end portion of the first locking portion abuts on the back surface of the first overhanging portion, and the notch shape of the second locking portion is formed on the front side surface and the upper surface of the second overhanging portion. A working machine having a configuration in which an inner surface of a part abuts. An upper body having a first overhanging portion projecting downward and a second overhanging portion projecting upward;
An abutting portion that is installed on a side surface of the upper body and is provided closer to the turning center of the upper body than the first and second overhanging portions;
An auxiliary platform having an attachment portion at an end to be fitted into the first overhanging portion and the second overhanging portion;
With
The attachment portion is provided with a first locking portion that extends upward, and a second locking portion is provided below the first locking portion,
In the auxiliary platform, an upper end portion of the first locking portion is in contact with a back surface of the first overhanging portion, and a lower surface of the second locking portion is in contact with an upper surface of the second overhanging portion, and A work machine having a configuration in which the back surface of the second locking portion is in contact with the contact portion. The work machine according to claim 1 or 2,
The work machine according to claim 1, wherein the auxiliary platform is detachable. In the work machine in any one of Claims 1-3,
The auxiliary platform has a platform body, and a mounting bracket as the mounting portion attached to the platform body via a rod-shaped member,
When the auxiliary platform is not used, the platform body is set up with respect to the mounting bracket by rotating the platform body around the rod-shaped member, and the platform body and the mounting bracket are stored in this standing state. A work machine characterized by being fixed with a pin. The work machine according to claim 4,
The center of the hole provided in the mounting bracket into which the rod-shaped member is inserted is a position deviated from the center of gravity of the mounting bracket so that the mounting bracket can rotate by its own weight. Work machine. In the work machine according to any one of claims 1 to 5,
Further comprising a lifting prevention bracket pinned to the mounting portion,
The lifting prevention bracket has a recess that engages with the lower end of the first overhang,
The auxiliary platform is configured to engage the concave portion with a lower end portion of the first projecting portion and pin the anti-lift bracket to the attachment portion of the auxiliary platform attached to a side surface of the upper body. The working machine is characterized in that it is prevented from lifting.

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