JP6562040B2 - Construction machinery - Google Patents

Description

  The present invention relates to a construction machine.

  For example, construction machines such as cranes and hydraulic excavators are provided with a revolving upper swinging body on a lower traveling body, and a swingable boom is attached to the front end of the upper revolving body, and the rear end of the upper revolving body It is configured to balance the weight by mounting a counterweight.

  In many construction machines, for example, a counterweight is detachable in order to divide it into a plurality of parts that can be transported by truck or to turn the upper swinging body in a narrow space. The detachable counterweight is generally fixed to the upper swing body using a fixing member (coupling means) such as a through bolt, as described in, for example, Japanese Patent Application Laid-Open No. 2000-143165.

  When the construction machine is used or transported with the counterweight removed, not only the counterweight but also the fixing member needs to be stored or transported separately from the main body of the construction machine. If a relatively small fixing member is stored or transported separately, the fixing member may be lost. If the fixing member is placed on the floor, the operator may accidentally step on it, or may be damaged by placing a counterweight or the like on the floor. As described above, in the conventional construction machine, it is necessary to pay attention to the management of the fixing member used for fixing the counterweight to the upper swing body.

JP 2000-143165 A

  In view of the above problems, an object of the present invention is to provide a construction machine that can easily manage a fixing member that fixes a counterweight to an upper swing body.

  A construction machine according to the present invention, which has been made to solve the above problems, includes a lower traveling body, an upper revolving body mounted on the lower traveling body so as to be capable of swiveling in a horizontal direction, and detachable from the upper revolving body. A construction machine comprising a counterweight to be mounted, the counterweight having a holding portion for holding a fixing member for fixing the counterweight to the upper swing body when the counterweight is detached from the upper swing body It is characterized by that.

  In the construction machine, since the counterweight has a holding portion for holding the fixing member, the holding member is held by the holding portion when the counterweight is removed from the upper swing body, and the fixing member is integrated with the counterweight. Can be handled. For this reason, management of a fixing member is easy and troubles, such as loss and damage of a fixing member, can be prevented.

  In the construction machine, the holding portion may protrude from the upper surface of the counterweight, and the fixing member may be supported apart from the upper surface of the counterweight. According to this configuration, since the fixing member is held above the counterweight, when the construction machine lifts and moves the removed counterweight, the fixing member erroneously abuts against another object. Can be prevented. In addition, the construction machine holds the fixing member away from the upper surface of the counterweight, so that it is difficult for rainwater or the like to remain attached to the fixing member, and deterioration of the fixing member can be suppressed.

  In the construction machine, the fixing member may be a through bolt that penetrates the counterweight. According to this configuration, since the fixing member is a through bolt, the counterweight can be easily and reliably fixed to the upper swing body. Although the through bolt has a relatively large length, it can be prevented from interfering with other objects by being held by a holding portion protruding from the upper surface of the counterweight.

  In the construction machine, the holding unit may include a support member that supports the fixing member and a pressing member that prevents the fixing member from being detached from the support member. According to this configuration, since the holding member prevents the fixing member from being detached from the support member, the counterweight can be easily handled.

  In the construction machine, the pressing member may be rotatably connected to the support member. According to this configuration, it is possible to prevent the pressing member from being lost when the holding portion does not hold the fixing member.

  In the construction machine of the present invention, it is easy to manage the fixing member that fixes the counterweight to the upper swing body.

It is a typical side view showing a construction machine concerning one embodiment of the present invention. It is a typical rear view which shows the counterweight of the construction machine of FIG. FIG. 3 is a schematic perspective view showing an upper counterweight in FIG. 2. It is a typical side view which shows the holding part of the counterweight of FIG.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings as appropriate.

[Construction machinery]
FIG. 1 shows a construction machine according to an embodiment of the present invention. The construction machine is a crawler crane.

  The construction machine includes a self-propelled lower traveling body 1, an upper revolving body 2 provided on the lower traveling body 1 so as to be horizontally rotatable, and a crane attachment (working tool) provided at a front portion of the upper revolving body 2. 3 and a plurality of counterweights (first counterweight 4 and second counterweight 5) that are detachably attached to the rear end of the upper swing body 2.

  In the construction machine, the lower traveling body 1 includes a pair of crawlers 6 as a traveling device. The crane attachment 3 has a telescopic boom that can be expanded and contracted.

<Counterweight>
The first counterweight 4 and the second counterweight 5 are arranged on the opposite side of the crane attachment 3 so that the construction machine can move the weight of the crane attachment 3 and the load lifted by the crane attachment 3 to the front side of the upper swing body 2. It is provided for the purpose of preventing falling down.

  The first counterweight 4 and the second counterweight 5 have a side surface opposite to the upper swing body 2 away from the center of rotation of the upper swing body 2 in order to reduce the space required for the upper swing body 2 to rotate. A shape that approximates a cylindrical surface such that the distance is substantially constant is preferable.

  In the construction machine, the first counterweight 4 and the second counterweight 5 are attached to the upper swing body 2, the first counterweight 4 and the second counterweight 5 are removed from the upper swing body 2, or the upper swing It can be used in a state where only the second counterweight 5 is removed from the body 2 (only the first counterweight 4 is attached). In the construction machine, by removing the counterweights 4 and 5, the space necessary for the turning of the upper swing body 2 is reduced, but the weight that can be lifted by the crane attachment 3 is reduced.

  The first counterweight 4 is supported by a convex portion 7 provided at the rear end of the upper swing body 2, and the upper swing body is formed by a pair of first fixing members 8 made of through bolts penetrating the first counterweight 4 in the horizontal direction. 2 is fixed. The second counterweight 5 is placed on the first counterweight 4 and a pair of second fixing members including a pair of through-bolts penetrating the first counterweight 4 and the second counterweight 5 in the vertical direction. 9 is fixed to the first counterweight 4.

  As shown in FIGS. 2 and 3, the first counterweight 4 and the second counterweight 5 are provided with a hanging ring 10 protruding from the upper surface. On the bottom surface of the second counterweight 5, a recess for accommodating the suspension ring 10 of the first counterweight 4 is formed.

  The second counterweight 5 includes a first holding portion 11 that holds the first fixing member 8 that is separated when the first counterweight 4 is removed from the upper swing body 2, and the second counterweight 5 is removed. It sometimes has a pair of second holding portions 12 that hold the second fixing member 9.

(Fixing member)
The first fixing member 8 is configured to be screwed into a tap hole formed in the upper swing body 2, and can be, for example, a long hexagon bolt or the like in which only a tip portion is a screw portion. The first counterweight 4 fixed to the upper swing body 2 by the first fixing member 8 has a counterbore that accommodates the head of the first fixing member 8 in the opening of the through hole through which the first fixing member 8 passes. It is preferable to be provided.

  The second fixing member 9 directly fixes the second counterweight 5 to the upper swing body 2 indirectly by fixing the second counterweight 5 to the first counterweight 4. The second fixing member 9 includes a rod-shaped shaft body 13 having an external screw formed at the tip, a seat plate 14 provided at the rear end of the shaft body 13 and placed on the upper surface of the second counterweight, A suspension ring 15 is provided on the upper surface of the seat plate 14.

  The second fixing member 9 has a shaft body 13 inserted through a through hole formed in the first counterweight 4 and the second counterweight 5, and a washer 16 is fitted to the tip of the shaft body 13, so that the external screw of the main body When the nut 17 is screwed to the first counterweight 4, the first counterweight 4 and the second counterweight 5 are sandwiched between the seat plate 14 and the washer 16 to fix the second counterweight 5 on the first counterweight 4. Moreover, it is preferable that the 2nd fixing member 9 is comprised so that insertion of the pin which prevents dropping of the nut 17 is possible.

  The second fixing member 9 is formed such that the shaft body 13 extends vertically downward by being lifted using the suspension ring 15 and penetrates the first counterweight 4 and the second counterweight 5 in the vertical direction. Can be inserted into the through hole. It is preferable that a counterbore for accommodating the washer 16 and the nut 17 is provided on the bottom surface of the first counterweight 4.

  Further, a protrusion 18 adjacent to the side edge of the seat plate 14 of the second fixing member 9 in a state in which the second counterweight 5 is fixed by the second fixing member 9 may be provided on the upper surface of the second counterweight 5. preferable. Since the second counterweight 5 has such protrusions 18, it is possible to prevent the second fixing member 9 from rotating when the nut 17 is screwed onto the second fixing member 9. Therefore, the second counterweight 5 can be easily fixed.

(Holding part)
As shown in FIG. 3, the first holding portion 11 is provided in a dead space that does not interfere with the upper swing body 2 in the recess that receives the end of the upper swing body 2 of the second counterweight 5, and the first fixing member 8. Is configured to form a hole or tube inserted in the vertical direction.

  The first holding unit 11 may hold the head of the first fixing member 8 so as to protrude onto the second counterweight 5. Thereby, the space which the 1st holding | maintenance part 11 occupies can be made small.

  The pair of second holding portions 12 protrude from the upper surface of the second counterweight 5 and are configured to support the second fixing member 9 separately from the upper surface of the second counterweight 5. Specifically, as shown in detail in FIG. 4, the second holding portion 12 is erected on the upper surface of the second counterweight 5 at an interval slightly smaller than the length of the second fixing member 9. And a pressing member 20 that prevents the second fixing member 9 from being detached from the supporting member 19. The support member 19 preferably supports a portion of the shaft 13 of the second fixing member 9 where no screw is provided.

  The support member 19 has a pair of side walls extending upward and a back wall connecting between one side edge of the pair of side walls, and receives the second fixing member 9 on the other side edge of the pair of side walls. It has a receiving side cutout 21. The receiving side notch 21 is inclined and opened obliquely upward, guides and holds the second fixing member 9 toward the heel side, and prevents the second fixing member 9 from dropping even in the absence of the pressing member 20. Yes.

  Further, since the receiving side cutouts 21 of the pair of support members 19 are equal in height, the second fixing member 9 is held parallel to the upper surface of the second counterweight 5. “Parallel” means that the relative angle is 5 ° or less.

  The holding member 20 has a pair of side walls disposed between the pair of side walls of the support member 19 and a front wall connecting the side edges of the pair of side walls opposite to the back wall of the support member 19. Two pressing side cutouts 22 for receiving the second fixing member 9 are provided on the side edges of the pair of side walls opposite to the front walls. The pressing side cutout 22 is combined with the receiving side cutout 21 of the support member 19 to form a hole for holding the second fixing member 9. That is, by sealing the opening of the receiving side cutout 21 of the support member 19 with the pressing member 20, the second fixing member 9 is prevented from being detached from the receiving side cutout 21.

  The lower end of the pressing member 20 is pivotally connected to the support member 19 by the connection shaft 23 so that the second fixing member 9 can be detached from the support member 19. Yes. As described above, since the pressing member 20 can be rotated around the lower end, the pressing member 20 can be maintained in a state where it is rotated downward by its own weight, and therefore the receiving side cutout 21 of the support member 19 is opened. Accordingly, the support member 19 of the second fixing member 9 can be easily disposed in the receiving side cutout 21 and removed from the receiving side cutout 21.

  The holding member 20 has a butterfly bolt 25 that can be screwed into a long nut 24 provided on the support member 19 and can be fixed in a state that prevents the second fixing member 9 from being detached from the support member 19. it can.

  The pressing member 20 has a locking projection 26 at the lower end and abuts against a stopper 27 provided on the support member 19 so as to define a rotation range around the connection shaft 23. Thereby, it is possible to prevent the butterfly bolt 25 from colliding with the second counterweight 5 and being damaged.

<Advantages>
In the construction machine, the second counterweight 5 includes the first holding portion 11 that holds the first fixing member 8 and the second holding portion 12 that holds the second fixing member 9. When the counterweight 4 and the second counterweight 5 are removed, the first holding member 11 and the second holding portion 12 can hold the first fixing member 8 and the second fixing member 9. Therefore, the construction machine can handle the first fixing member 8 and the second fixing member 9 integrally with the second counterweight 5 when the first counterweight 4 and the second counterweight 5 are removed. The first fixing member 8 and the second fixing member 9 can be easily managed, and troubles such as loss and damage of the first fixing member 8 and the second fixing member 9 can be prevented.

  In the construction machine, the second holding portion 12 protrudes from the upper surface of the second counterweight 5 and the second fixing member 9 is held above the second counterweight 5, so that the removed first counterweight 4 is removed. Alternatively, when the second counterweight 5 is lifted and moved, the first fixing member 8 or the second fixing member 9 can be prevented from being accidentally brought into contact with another object, and the first fixing member 8 and the second fixing member 9 can be prevented. Can prevent damage.

  In the construction machine, since the second holding unit 12 holds the second fixing member 9 apart from the upper surface of the second counterweight 5, it is difficult for rainwater or the like to remain attached to the second fixing member 9. And the deterioration by the rust etc. of the 2nd fixing member 9 can be suppressed.

  In the construction machine, the second fixing member 9 is a through bolt that penetrates the first counterweight 4 and the second counterweight 5 so that the second counterweight 5 can be reliably fixed. For this reason, the second fixing member 9 has a relatively long length, but the second holding member 12 holds the second fixing member 9 in parallel with the upper surface of the second counterweight 5. Interference with the object can be effectively prevented.

  In the construction machine, the second holding portion 12 includes a support member 19 that supports the second fixing member 9 and a pressing member 20 that prevents the second fixing member 9 from being detached from the support member 19. Therefore, the second fixing member 9 can be securely held and integrated with the second counterweight 5 and can be easily handled.

  In the construction machine, since the pressing member 20 is pivotally connected to the support member 19, the pressing member 20 can be moved even when the second holding portion 12 does not hold the second fixing member 9. The pressing member 20 can be prevented from being lost without being separated from the second counterweight 5.

[Other Embodiments]
The said embodiment does not limit the structure of this invention. Therefore, in the above-described embodiment, the components of each part of the above-described embodiment can be omitted, replaced, or added based on the description and common general knowledge of the present specification, and they are all interpreted as belonging to the scope of the present invention. Should.

  In the construction machine, the number of counterweights is arbitrary. In the case of providing a plurality of counterweights, it is preferable to provide a holding portion for holding the fixing member in the counterweight arranged on the uppermost side.

  In the construction machine, the fixing member may be any member that can fix the counterweight to the upper swing body, and is not limited to a through bolt, and may have any structure such as a clamp.

  The construction machine is not limited to a crawler crane, and may be a wheel crane, a hydraulic excavator, or the like.

  When the construction machine is a crane, the crane attachment is not limited to one having a telescopic boom, and may have a lattice boom.

  The structure of the holding portion in the construction machine is not limited to the structure having the support member and the pressing member as in the above-described embodiment, and an arbitrary configuration, for example, a recess formed so that the fixing member is fitted to the upper surface of the counterweight Etc.

  The construction machine according to the present invention can be particularly suitably applied to a crane.

DESCRIPTION OF SYMBOLS 1 Lower traveling body 2 Upper turning body 3 Crane attachment 4 1st counterweight 5 2nd counterweight 6 Crawler 7 Convex part 8 First fixing member 9 Second fixing member 10 Suspension ring 11 First holding part 12 Second holding part 13 Shaft body 14 Seat plate 15 Suspension ring 16 Washer 17 Nut 18 Protrusion 19 Support member 20 Holding member 21 Receiving side notch 22 Retaining side notch 23 Connection shaft 24 Long nut 25 Butterfly bolt 26 Locking protrusion 27 Stopper

Claims (4)

A construction machine comprising: a lower traveling body; an upper swinging body mounted on the lower traveling body so as to be pivotable in a horizontal direction; and a counterweight detachably attached to the upper swinging body,
The counterweight, the counterweight have a holding portion for holding the fixing member for fixing to the upper rotating body when removed from the upper revolving body,
The holding portion is configured to support the fixing member so as to be spaced upward from the upper surface of the counterweight.
A construction machine , wherein the fixing member is a through-bolt penetrating a plurality of stacked counterweights in the vertical direction . The holding portion, the construction machine according to claim 1 that will be projected on the upper surface of the counterweight. The holding portion, the construction machine according a support member for supporting the fixing member, to claim 1 or claim 2 and a pressing member for preventing the detachment of the fixing member from the support member. The construction machine according to claim 3 , wherein the pressing member is pivotally connected to the support member.

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