JP2014047012A - Counterweight device for construction machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a counterweight for a construction machine, which can be easily split or assembled, and which is suitable for an attachment structure having an attachment surface hooked on a back surface of the construction machine or suspended from the back surface.SOLUTION: A step-part-to-be-locked 6 of an outside weight 3 is hooked on a holding step part 5 of an inside weight 2, and a protrusion 7 for prevention of displacement is protruded into a recess 8 to fix the inside and outside weights 2 and 3. In addition, attachment surfaces 101a and 101b configuring an inner wall surface of a counterweight part 4 are formed in a recessed shape in accordance with a shape of a construction machine-side attachment position.

Description

  The present invention relates to an improvement of a counterweight device for a construction machine that is attached to a swing body of a mobile crane vehicle.

For construction equipment such as large mobile cranes, the weight of the counterweight device is heavy, and it is necessary to satisfy safety standards when traveling on public roads. It may be necessary to reduce the total weight of the.
In addition, there is a problem of weight when transporting the counterweight device itself, and it is expensive to arrange a large trailer. Therefore, there is a demand for dividing the counterweight device so that it can be transported by a general-purpose truck or the like.

  As a technique for meeting such a request, a counterweight mounting structure disclosed in Patent Document 1 and a counterweight device disclosed in Patent Document 2 are already known.

The counterweight mounting structure disclosed in Patent Document 1 includes a counterweight device made of a lump body, a counterweight of a base portion constituting the base portion thereof, a center counterweight attached to the upper surface of the central portion of the base portion, and The left and right counterweights are divided into four parts, the left and right counterweights, and each of the left and right counterweights is divided into a plurality of segments in the vertical direction.
When such a configuration is applied, the weight of each of the segmented counterweights is greatly reduced, so that the counterweight transfer operation is facilitated.
In addition, the suspension ring constituting the suspension part for the suspension rope is provided at the center of each of the segments constituting the center counterweight and the left and right counterweights, so even the number of segments constituting the left and right counterweights is matched. Therefore, even if the counterweight is assembled or the counterweight is divided, there is no concern that the counterweight will unintentionally lose balance when the counterweight is lifted.
However, since the number of segments increases and the mounting of individual segments is performed using bolts, there are inconveniences such as troublesome counter weight assembly and division work.
In addition, mounting to the construction equipment is performed by mounting and fixing the counterweight of the base portion on the end of the frame protruding from the rear of the construction equipment, so the mounting surface of the counterweight is attached to the back of the construction equipment. There is a problem that it is not suitable for a mounting structure in which the counterweight is hung or suspended from the back of the construction machine.

The counterweight device disclosed in Patent Document 2 is configured by dividing a counterweight made of a lump into two upper and lower stages, and further dividing each stage counterweight into two left and right parts. The unit should be able to perform lifting work without breaking the balance, even when lifting the counterweight located on one side of the left or right as a single unit, or when lifting it in a fixed state. It is in.
In order to achieve this object, in the counterweight device disclosed in Patent Document 2, a single lifting rope fixing portion for lifting only the lower counterweight in a balanced manner is provided in the lower counterweight, and the upper counterweight is further provided. For the weight, the outer rope fixing portion (38A) and the inner rope fixing portion (38B) for lifting only the upper counterweight in a well-balanced manner, and the upper counterweight and the lower counterweight are combined in a well-balanced manner. An outer rope fixing part (38A) and an inner rope fixing part (38C) are provided, and the rope fixing part to be used is selected according to the situation.
However, the number of rope fixing portions to be selected is two at the lower one-side counterweight, four at the upper one-side counterweight, that is, only six counterweights located on the left and right sides are convenient. Because of this situation, the selection of the rope fixing part to be used for lifting and the laying of the rope are complicated, so if you select the wrong rope fixing part and hang the rope, the counter will be There is a possibility that the weight is greatly out of balance.
Moreover, since the outer rope fixing portion (38A) and the inner rope fixing portion (38C) for lifting the upper counterweight and the lower counterweight in combination are provided only in the upper counterweight, In order to lift the counterweight in combination with the lower counterweight, the upper and lower counterweights must be fixed with bolts and integrated, and the setup work for transporting the counterweight is complicated. There is also.
And this also, like the counterweight mounting structure disclosed in Patent Document 1 described above, is fixed to the construction machine by placing the lower counterweight on the end of the frame protruding from the rear of the construction machine. Therefore, it is not suitable for a mounting structure in which the counterweight mounting surface is hooked on the construction equipment back surface or the counterweight is suspended from the construction equipment back surface.

Note that the counterweight disclosed in Patent Document 3 is known as the one formed by dividing the counterweight in the front-rear direction, but this is designed to reduce the counterweight in the front-rear direction in order to shorten the curing time after manufacture. The counterweight is only thinned and the counterweight is thinned, and is not particularly technically related to the divided conveyance of the counterweight.
Of course, even with such a configuration, it is considered possible to divide and transport the counterweight again, but each of the divided counterweights is lifted independently or combined with the front and back counterweights. There are no problems with the lifting of the counterweight, such as the mounting position of the lifting ring or the weight distribution of the counterweight divided in the front and rear, which contributes to the stable lifting of the counterweight. I don't get it.

  On the other hand, as a counterweight attaching / detaching device that is used when hooking a counterweight mounting surface on the back of a construction machine or hanging a counterweight from the back of the construction machine, for example, as disclosed in Patent Document 4 Such attachment / detachment devices are already known.

FIG. 2 is a perspective view showing a known example of a construction machine counterweight device that is attached to a swing body of a mobile crane using this type of attachment / detachment device.
This construction machine counterweight device 100 has an attachment surface 101 formed in a shape that follows the shape of the attachment position on the back surface of a revolving unit of a mobile crane vehicle. A recess 102 is formed to be fitted to a substantially rectangular mounting base (not shown) provided in the.
And the upper end part of the level | step-difference part 104,104 formed between the bottom face 103 of the recessed part 102 and the left and right attachment surfaces 101,101 protrudes slightly toward the inner side of the recessed part 102, and this protrusion part 104a, 104a. The semi-circular cutouts 105, 105 formed on the lower surface side of the mobile body are hooked on support pins (not shown) projecting outward from the left and right of the upper end portion of the mounting base on the back of the revolving unit, thereby The construction machine counterweight device 100 is attached to the back of the revolving structure.
Pins 107, 107 hung inside notches 106, 106 formed on the left and right sides of the upper surface of the construction machine counterweight device 100 are for hanging ropes when the construction equipment counterweight device 100 is lifted. It functions as a stopper, and the construction machine counterweight device 100 can be lifted without breaking the balance by hanging a rope around these pins 107 and 107 and lifting the center of the rope with a crane hook or the like. It is like that.

JP 2000-143165 A (FIGS. 2 and 6) JP 2004-360417 A (paragraph 0033, paragraph 0027, FIG. 6, paragraph 0032, FIG. 8) Japanese Patent Laying-Open No. 2006-193915 (FIG. 3) Japanese Patent No. 2772669

  The object of the present invention can be easily divided and assembled without using bolts, and is suitable for a mounting structure in which a mounting surface is hooked on or hung from the back of a construction machine. An object of the present invention is to provide a construction machine counterweight device.

The construction machine counterweight device of the present invention has a counterweight portion in which a suspension rope locking portion is installed in at least two places on the upper end surface, and an inner wall surface facing the construction equipment to be equipped is formed in a concave shape. In the construction equipment counterweight device,
The counterweight part is divided into an inner weight and an outer weight, and a holding step for holding the outer weight is provided around the upper end of the inner weight.
A locked stepped portion that is locked by the holding step portion of the inner weight is provided on the inner wall surface of the outer weight,
One of the holding step of the inner weight and the locked step of the outer weight is provided with a protrusion for preventing the outer weight from being displaced relative to the inner weight, while the other is provided with the protrusion. It has the structure characterized by providing the engagement hole which engages.

According to the above configuration, the locked step portion of the outer weight is hooked on the holding step portion of the inner weight, and the misalignment prevention protrusion provided on the holding step portion is engaged with the engagement hole of the locked step portion. Since the counterweight portion can be configured by fixing the inner weight and the outer weight simply by being inserted into the counterweight, it is possible to easily divide and assemble the construction equipment counterweight device without using bolts.
Moreover, the inner wall surface of the counterweight part facing the installed construction equipment is formed in a concave shape to match the shape of the mounting position on the construction equipment side. Suitable for mounting structure that is hung on the back of

  Moreover, it is preferable that the suspension portions for the suspension ropes are installed on the inner weights at positions that are separated by the same distance in the opposite direction from the center of gravity of the counterweight portion.

Even if only the inner weight is lifted alone, the inner weight and the outer side are provided by providing the suspension portion for each suspension rope on the inner weight at the same distance in the opposite direction from the center of gravity of the counterweight. Even when lifting with a combination of weights, it is possible to carry out lifting in a balanced manner using only the suspension portions for each suspension rope on the inner weight, and at the same time, suspension for suspension ropes to be used. Inconveniences such as wrong selection of parts are also eliminated.
The reason is that the hanging rope locking part used when lifting only the inner weight alone is the same as the hanging rope locking part used when lifting with a combination of the inner weight and the outer weight. In other words, it is because of the inner weight.

In the construction machine counterweight device of the present invention, the latching step portion of the outer weight is hooked on the holding step portion of the inner weight, and the protrusion for preventing misalignment provided on the holding step portion is locked. The counterweight part can be configured by fixing the inner weight and the outer weight simply by entering into the engagement hole of the machine. Therefore, it is easy to divide and assemble the counterweight device for construction equipment without using bolts. Can do.
Moreover, the inner wall surface of the counterweight part facing the installed construction equipment is formed in a concave shape to match the shape of the mounting position on the construction equipment side. Suitable for mounting structure that is hung on the back of

It is the perspective view shown in the division | segmentation state about the counterweight apparatus for construction machines of one Embodiment to which this invention is applied. It is the perspective view which showed the well-known example of the counterweight apparatus for construction machines attached to the turning body etc. of a mobile crane vehicle.

  Next, an embodiment for carrying out the present invention will be given, and the configuration of each part will be specifically described with reference to the drawings.

  FIG. 1 is a perspective view showing a construction machine counterweight device according to an embodiment to which the present invention is applied in a divided state.

The construction machine counterweight device 1 of this embodiment is the same as the construction machine counterweight device 100 shown in FIG. 2 by combining the inner weight 2 and the outer weight 3 into an integral lump body, that is, the counterweight portion 4. It is the counterweight apparatus 1 for construction machines used as a shape.
In the state in which the inner weight 2 and the outer weight 3 are combined, the overall shape excluding the suspension portion for the hanging rope and the holding pin is the same as the known example shown in FIG. FIG. 2 is used for the description of the shape.

  The counterweight unit 4 constituting the main part of the construction machine counterweight device 1 has the counterweight unit 4 mounted at the mounting position on the back of the construction machine to be mounted, for example, at the mounting position on the back of the swing body of the mobile crane. In the state, by the inner weight 2 positioned on the side close to the mounting position, and the outer weight 3 surrounding the inner weight 2 from the outside except the lower end surface 2b and the upper end surface 2a of the inner weight 2 and the mounting surface 101a. Composed.

  As described above, the overall shape when the inner weight 2 and the outer weight 3 are combined to form an integral lump body, that is, the counterweight portion 4, is the same as the construction machine counterweight device 100 shown in FIG. The weight 2 is formed with an attachment surface 101a that follows the shape of the attachment position on the back of the construction equipment to be attached, and the outer weight 3 combined with the inner weight 2 is also attached to the back of the construction equipment to be attached. A mounting surface 101b having a shape following the shape of the mounting position is formed, and when the inner weight 2 and the outer weight 3 are combined, the mounting surface 101a of the inner weight 2 and the mounting surface 101b of the outer weight 3 are connected without any step. 2 has the same shape as the mounting surface 101 of the construction machine counterweight device 100 shown in FIG.

  In this embodiment, since it is premised that the shape of the back of the revolving body of the mobile crane vehicle to which the construction machine counterweight device 1 is attached is a substantially arcuate secondary plane that protrudes outward in a horizontal plane. The shape of the mounting surface including the mounting surface 101a of the inner weight 2 and the mounting surface 101b of the outer weight 3 is also a generally arcuate concave shape (see Appendix 1). If the shape of the back of the body is an upright plane, the shape of the mounting surface 101a of the inner weight 2 and the mounting surface 101b of the outer weight 3 must naturally be flat according to the shape.

  In addition, the attachment surface which combined the attachment surface 101a of the inner weight 2 and the attachment surface 101b of the outer weight 3 is a location corresponding to the inner wall surface (see Appendix 1) of the counterweight portion 4 facing the construction machine.

  Then, the center portion of the mounting surface 101a of the inner weight 2 is fitted to a substantially rectangular mounting base (not shown) provided on the back surface of the revolving body of the mobile crane vehicle, similarly to the known example shown in FIG. A recess 102 is formed, and the upper ends of the stepped portions 104, 104 formed between the bottom surface 103 of the recess 102 and the left and right mounting surfaces 101a, 101a slightly protrude toward the inside of the recess 102, and this protrusion 104a , 104a, the semicircular cutouts 105, 105 formed on the lower surface side of the swing base are hooked on the support pins (not shown) projecting outward from the left and right of the upper end portion of the mounting base on the back of the revolving unit. An inner weight 2 is attached to the rear surface of the car revolving unit.

  Of the inner weight 2 and the outer weight 3 constituting the counterweight portion 4, a step portion (holding step portion) 5 for holding the outer weight 3 is formed on the outer periphery of the upper end portion of the inner weight 2. Further, a stepped portion (locked stepped portion) 6 that is locked by the stepped portion 5 of the inner weight 2 is formed on the inner wall surface of the outer weight 3 (see Appendix 1).

  Strictly speaking, the step portion 5 of the inner weight 2 is formed on each surface of the inner weight 2 adjacent to the upper end surface 2a of the inner weight 2 except for the mounting surface 101a, that is, the back surface and the side surface of the inner weight 2. And the step portion 6 of the outer weight 3 is formed at a portion of the upper end portion of the outer weight 3 excluding the mounting surface. 5 is a stepped part to be fitted to the step.

  Of these, on the left and right sides of the upper surface of the step portion 5 for holding the outer weight 3, truncated cone-shaped pins 7 functioning as convex portions for preventing the displacement of the outer weight 3 with respect to the inner weight 2 are planted. On the other hand, the lower surface of the step portion 6 of the outer weight 3 is formed with a tapered hole 8 that functions as a recess for fitting with the pin 7 to prevent the outer weight 3 from being displaced relative to the inner weight 2. ing.

In this embodiment, a convex portion is provided on the upper surface of the step portion 5 of the inner weight 2 and a concave portion is provided on the lower surface of the step portion 6 of the outer weight 3, but conversely, the step portion of the inner weight 2 is provided. A concave portion may be provided on the upper surface of 5, and a convex portion may be provided on the lower surface of the step portion 6 of the outer weight 3.
Moreover, as a convex part and a recessed part, the combination of a protrusion and a groove | channel other than the combination (refer appendix 1) of the protrusion and engagement hole which consist of pins etc. can be utilized.

  In this embodiment, a U-shaped cutout for preventing interference with a boom undulation derrick cylinder (not shown) provided in the mobile crane is formed with the lower ends of the inner weight 2 and the outer weight 3 left. Therefore, it is necessary to distribute the pins 7 and the tapered holes 8 on the left and right sides of the step portion 5 and the step portion 6, but the structure of the inner weight 2 and the outer weight 3 that does not require a U-shaped notch. In other words, in the structure in which the step portion 5 and the step portion 6 are also present in the central portion of the back surface of the inner weight 2 and the outer weight 3, only one central portion of the step portion 5 and the step portion 6 on the back side is provided. You may make it provide the pin 7 and the taper hole 8 in this.

  Furthermore, in this embodiment, the thickness and shape of each part of the inner weight 2 and the outer weight 3 are integrated as in the construction machine counterweight device 100 of FIG. 2 by combining the inner weight 2 and the outer weight 3. In the state, the vertical line V4 extending from the center of gravity G4 of the counterweight portion 4 to the plane including the upper end surface 2a of the inner weight 2 and the intersection G4 ′ of the plane and the center of gravity G2 of the inner weight 2 as a single unit The perpendicular V2 toward the plane including the upper end surface 2a coincides with the intersection point G2 ′ of the plane, and the plane is included in the inner weight 2 by the upper end surfaces 2a and 2a and the virtual plane region between them. The coincident intersections G4 ′ and G2 ′ are configured to be positioned, and are formed on the left and right upper end surfaces 2a and 2a of the inner weight 2 by the tongue pieces 9 and 9, respectively. Engagement for the two hanging rope stopper portion that is the intersection point described above coincides with the centroid G9 obtained by integrating the tongue piece 9, 9 G4 ', G2' are provided so as a match.

  As already described, in this embodiment, the U-shaped notch for preventing interference with a boom undulating derrick cylinder (not shown) is formed in the inner weight 2 and the outer weight 3, so that the inner side There is no portion corresponding to the upper end surface in the virtual plane region between the center portion of the weight 2, that is, the upper end surfaces 2 a and 2 a, but the structure of the inner weight 2 that does not require a U-shaped notch, that is, the inner weight 2 In a structure in which a portion corresponding to the upper end surface exists in the central portion, one tongue piece 9, that is, a single hanging rope locking portion is provided at a position corresponding to the coincident intersections G4 ′ and G2 ′. It doesn't matter if you do.

  In the example specifically shown in FIG. 1, there is no portion corresponding to the upper end surface in the central portion of the inner weight 2, so that the two tongue pieces 9, 9, that is, the two hanging rope locking portions are connected to the inner weight 2. In this case, the two tongue pieces 9 and 9 functioning as the suspension portions for the suspension ropes are inevitably provided on the counterweight portion 4. Arranged on the left and right upper end surfaces 2a, 2a of the inner weight 2 at the same distance in the opposite direction from the intersection G4 ′ corresponding to the position of the center of gravity G4 (the same applies to the position of the center of gravity G2 of the inner weight 2) ( The centroid G9 that combines the tongue pieces 9 and 9 and the coincident intersection points G4 ′ and G2 ′ coincide with each other.

  The tongue pieces 9, 9 are fixed on the upper end surface 2a of the inner weight 2 at a position close to the step portion 5 of the inner weight 2, and function as a hanging rope locking portion of the tongue pieces 9, 9. Is a portion of the holes 11 and 11 for attaching the hanging rope, which is drilled in the upper end portion.

  In this embodiment, a presser pin insertion hole 13 for inserting a pin 12 for pressing the upper end surface 3a of the outer weight 3 is further drilled in the base portion of each tongue piece 9, and the presser pin insertion hole. The pin 12 is inserted from 13 and the tip portion of the pin 12 is fitted into a substantially arc-shaped groove portion 14 formed on the upper end surface 3a of the outer weight 3, so that the outer weight 3 is lifted with respect to the inner weight 2 in the combined state. Can be prevented.

  A lug 16 constituting a retaining member is fixed to the base of the pin 12, and a dowel-like projection fixed to the tongue piece 9 side is passed through the hole of the lug 16, and further, a fixing tool is attached to the dowel-like projection. By attaching 17, the inadvertent dropping of the pin 12 from the pressing pin insertion hole 13 is prevented.

  Even if the inner weight 2 and the outer weight 3 are combined and integrated into the counterweight portion 4 or the inner weight 2 is divided into a single unit, the centers of gravity G4 and G2 are the same perpendicular line. Located on the extended line of V4 and V2, the centroid G9 (the same applies to the intersections G4 ′ and G2 ′) of the tongue pieces 9 and 9 is located above the center of gravity G4 and G2 along the perpendicular lines V4 and V2. Therefore, if a rope is connected to the holes 11 and 11 for attaching the hanging rope provided in these tongue pieces 9 and 9 and the central part thereof is lifted by a crane or the like, the inner weight 2 Regardless of whether the counterweight portion 4 is combined with the outer weight 3 or the inner weight 2 is divided into a single unit, the balance of the counterweight portion 4 and the inner weight 2 is not lost. The attitude of the positive stationary state and the counterweight unit 4 maintains the inner weights 2 can be lifted stably as shown in FIG.

Furthermore, in this embodiment, the thickness and shape of each part of the inner weight 2 and the outer weight 3 are perpendicular V3 from the center of gravity G3 of the outer weight 3 as a single unit to a plane including the upper end surface 3a of the outer weight 3. And an intersection G3 ′ of the outer weight 3 with the outer weight 3 attached to the inner weight 2 so as to substantially coincide with the coincident intersections G4 ′ and G2 ′. , 3a includes two hanging rope locking portions formed by the tongue pieces 10 and 10, respectively, and the center of gravity of the outer weight 3 in which the centroid G10 combining the tongue pieces 10 and 10 is a single body. From the tongues 9, 9 of the left and right upper end surfaces 2a, 2a of the inner weight 2 so as to coincide with an intersection G3 'between the perpendicular line V3 extending from G3 to the plane including the upper end surface 3a of the outer weight 3 and the plane. Also outside position Is provided.
Of the tongue pieces 10, 10, the portions of the suspension rope attaching holes 15, 15 formed in the upper end portion function as the suspension rope locking portions.
As described above, in the case of the inner weight 2, depending on the structure, it is possible to provide one tongue piece 9, that is, a single hanging rope locking portion at the center of the upper end surface of the inner weight 2. However, in the case of the tongue piece 10 that functions as the hanging rope locking portion of the outer weight 3, it is impossible to attach the hanging rope locking portion to the same location as the tongue piece 9, and the whole Even if there are two hanging rope locking portions on the inner weight 2 located on the inner side, it is impossible to attach the hanging rope locking portions of the outer weight 3 on the inner side. There are necessarily a plurality of arrangement locations.

  The center of gravity G3 of the outer weight 3 divided into a single unit is located on the extension of the vertical line V3, and the centroid G10 that combines the tongue pieces 10 and 10 is located above the center of gravity G3 along the vertical line V3. Therefore, if the central portion of the rope connected to the suspension rope attachment holes 15, 15 provided in the tongue pieces 10, 10 is lifted by a crane or the like, the balance of the outer weight 3 is lost. Without this, the outer weight 3 can be stably lifted while maintaining the posture in the normal position as shown in FIG.

  In this embodiment, with the outer weight 3 attached to the inner weight 2, a perpendicular V3 extending from the center of gravity G3 of the outer weight 3 divided into a single piece to a plane including the upper end surface 3a of the outer weight 3 is provided. And the plane G3 ′ are located slightly closer to the back than the coincident intersections G4 ′ and G2 ′ (the same applies to the centroid G9), that is, slightly to the right in FIG. , G2 ′ and the centroid G10 do not completely match, but the positional deviation is a few centimeters, for example, a few centimeters. Therefore, it is assumed that the inner weight 2 and the outer weight 3 are combined and integrated into a counterweight. Even if the tongue pieces 10 and 10 are selected instead of the tongue pieces 9 and 9 under the situation of the portion 4, and the central portion of the rope connected to the tongue pieces 10 and 10 is lifted by a crane or the like, Weight portion 4 is only inclined slightly counterclockwise in FIG. 1 from the orientation of the positive stationary state as shown in FIG. 1, is not the balance of the counterweight unit 4 is lost greatly.

  Next, operations for transporting the construction machine counterweight device 1 and operations for attaching the counterweight device 1 to the back of the revolving unit of the mobile crane will be briefly described.

  First, if the loading capacity of the truck used for transporting the construction machine counterweight device 1 is sufficient, the counterweight portion 4 constituting the construction equipment counterweight device 1 is divided into an inner weight 2 and an outer weight 3. Since it is not necessary to individually convey, it is desirable to use one truck from the viewpoint of transportation cost.

  At this time, if the inner weight 2 and the outer weight 3 in the divided state are combined and transported in the state of the counterweight portion 4, the inner weight 2 is first shown in FIG. Place it in such a state that That is, when the inner weight 2 is tilted, the rope is connected to the holes 11 and 11 for attaching the hanging ropes of the tongue pieces 9 and 9 that function as the hanging rope locking portions, and the center portion thereof is connected. It is necessary to place at least the inner weight 2 in a state as shown in FIG. 1 by lifting it with a crane or the like.

Next, the rope is connected to the holes 15 and 15 for attaching the hanging ropes of the tongue pieces 10 and 10 which function as the hanging rope locking portions of the outer weight 3, and the central part thereof is lifted by a crane or the like, and the outer weights are lifted. 1 is held in the position in the normal position as shown in FIG. 1, and the outer weight 3 is moved in a state where the mounting surfaces 101 b and 101 b of the outer weight 3 are directed to the rear surface of the inner weight 2 by operating a crane or the like. The outer weight 3 is attached to the inner weight 2 so that the inner weight 2 is gradually approached toward the inner weight 2 from behind and the step 6 of the outer weight 3 is hooked on the step 5 of the inner weight 2.
A weight receiver 18 is attached to the upper surface of the step portion 5, and the outer weight 3 is lowered to bring the lower surface of the step portion 6 into contact with the upper surface of the step portion 5.
At this time, the tip of the truncated cone-shaped pin 7 planted on the upper surface of the step portion 5 is fitted into the tapered hole 8 on the lower surface of the step portion 6, and the horizontal displacement of the outer weight 3 with respect to the inner weight 2 is shifted. To prevent.

  Then, the pins 12, 12 are inserted into the holding pin insertion holes 13, 13 provided in the tongue pieces 9, 9 of the inner weight 2, and the tip portions thereof are substantially circles formed on the upper end surfaces 3 a, 3 a of the outer weight 3. By fitting into the arc-shaped grooves 14, 14, the outer weight 3 is prevented from being lifted with respect to the inner weight 2 in the combined state, and the dowel-shaped protrusion on the tongue piece 9 side is provided with the lug 16 provided on the pin 12 side. The pin 12 is prevented from dropping from the presser pin insertion hole 13 by attaching the fixture 17 to the dowel-shaped protrusion through the hole.

  The assembly work of the outer weight 3 to the inner weight 2 is extremely simple in that the outer weight 3 is overlapped on the inner weight 2 and both are fixed by the pins 12, and screwing work such as bolts and precise positioning work are absolutely necessary. Therefore, the assembly work of both can be performed smoothly.

  Next, the rope is re-hanged in the suspension rope attaching holes 11 and 11 of the tongue pieces 9 and 9 which function as the suspension portion for the suspension rope of the inner weight 2, the central portion thereof is lifted by a crane or the like, and the outer weight 3 The inner weight 2 attached, that is, the integrated counterweight portion 4 is placed on the truck bed by operating the crane.

However, when the pins 12 and 12 have sufficient strength, the pins 12 and 12 are inserted into the pressing pin insertion holes 13 and 13 of the tongue pieces 9 and 9 as described above, and the pins 12 and 12 are inserted into the tongue pieces. 9. After fixing to 9, 9, the rope connected to the tongues 10, 10 of the outer weight 3 at that time is lifted with a crane or the like, and the inner weight 2 It is also possible to place the attached outer weight 3, that is, the integrated counterweight portion 4 on the truck bed as it is by operating the crane.
In this case, due to the circumstances as described above (see paragraph 0040), the lifted counterweight portion 4 is slightly tilted counterclockwise in FIG. 1 from the normal position as shown in FIG. However, this inclination is slight, and the lower surface of the counterweight portion 4 is held in a substantially horizontal state, so that no trouble is caused in the operation of loading the truck onto the loading platform.

  On the other hand, in a situation where the loading capacity of the truck used for conveyance is greatly limited, the counterweight portion 4 constituting the construction machine counterweight device 1 is replaced with the inner weight 2 regardless of whether or not it is preferable. It becomes necessary to divide the outer weights 3 and transport each of them on a separate track.

In this case, if the inner weight 2 and the outer weight 3 remain in a combined state, first, the fixing members 17 and 17 are removed from the dowel-shaped protrusions provided on the tongue pieces 9 and 9 of the inner weight 2, and the pressing pin The pins 12 and 12 are pulled out from the insertion holes 13 and 13.
Then, the rope is connected to the holes 15 and 15 for attaching the hanging ropes of the tongue pieces 10 and 10 which function as the suspension parts for the hanging ropes of the outer weight 3, and the center part thereof is lifted by a crane or the like to lift the inner weight. The outer weight 3 is removed from 2, and the crane is further operated to load the outer weight 3 on the first truck.

  Next, the rope is re-hanged on the holes 11 and 11 for attaching the hanging ropes of the tongue pieces 9 and 9 which function as the hanging rope locking portions of the inner weight 2, and the central part is lifted by a crane or the like, and the inner weight is lifted. 2 will be placed on the loading platform of the second truck.

  In the situation where the inner weight 2 and the outer weight 3 are divided from the beginning, any of the inner weight 2 and the outer weight 3 may be loaded first.

  The work of removing the outer weight 3 from the inner weight 2 is very simple, such as removing the pin 12 and lifting the outer weight 3 from the inner weight 2, and does not require any work such as removing bolts. It can be done smoothly.

Further, when the inner weight 2 and the outer weight 3 carried in the combined state are mounted at the mounting position on the back of the revolving unit in the mobile crane vehicle, first, the mobile crane vehicle itself is used. The counterweight portion 4 is placed at a counterweight temporary placement position provided at the center of the chassis of the crane vehicle.
In this case, the inner weight 2 attached with the outer weight 3 is hung with a rope in the holes 11 and 11 for attaching the hanging rope of the tongue pieces 9 and 9 of the inner weight 2 and the central part is lifted by the crane of the crane vehicle itself. 2, that is, the integrated counterweight portion 4 is placed at the counterweight temporary placement position in the center of the chassis.
At this time, the counterweight portion 4 is placed at the temporary placement position so that the mounting surfaces 101a and 101b of the counterweight portion 4 face the direction in which the turning body is located, that is, the rearward direction of the vehicle.
However, as described above, when the pins 12 and 12 have sufficient strength, a rope is connected to the tongue pieces 10 and 10 of the outer weight 3 so that the counterweight portion 4 is placed at the counterweight temporary placement position of the crane vehicle. You may make it mount.

  Next, the swing body of the mobile crane is rotated 180 ° so that the boom is directed rearward in the vehicle traveling direction, the mounting position of the rear surface of the swing body is made to face the mounting surfaces 101a and 101b of the counterweight portion 4, and the counterweight is mounted. The hydraulic cylinder is operated to engage the mounting base provided on the inner weight 2 with the counterweight mounting hydraulic cylinder on the swing body side, and the counterweight section 4 is mounted on the back surface of the swing body of the mobile crane vehicle.

  A counterweight attaching / detaching device for attaching / detaching the counterweight portion 4 to / from the back surface of the revolving structure is already known as described in the background art section.

In addition, the operation of removing the counterweight portion 4 from the rear surface of the revolving body of the mobile crane vehicle is performed by operating the counterweight attaching / detaching device with the boom directed rearward in the vehicle traveling direction, so that the removed counterweight portion 4 is removed. Is automatically lowered to the counterweight temporary storage position in the center of the chassis of the crane truck.
Therefore, if the swivel body from which the counterweight part 4 is removed is rotated and the boom is directed forward in the vehicle traveling direction, the counterweight part 4 can be easily moved from the counterweight temporary placement position using the crane of the mobile crane vehicle itself. It can be lifted and placed on the truck bed as it is.
In this case, the rope used for lifting is attached by using the suspension rope attaching holes 11, 11 of the tongue pieces 9, 9 of the inner weight 2.
Similarly to the above, when the pins 12 and 12 have sufficient strength, it is possible to connect the rope to the tongue pieces 10 and 10 of the outer weight 3 and lift the counterweight portion 4 from the counterweight temporary placement position of the crane vehicle. I do not care.

On the other hand, when the inner weight 2 and the outer weight 3 carried in the divided state are mounted at the mounting position on the rear surface of the swing body in the mobile crane vehicle, first, the mobile crane vehicle itself is used. And the inner weight 2 is mounted in the counterweight temporary placement position provided in the chassis center part of the crane vehicle.
In this case, a rope is hung on the hanging rope attachment holes 11 and 11 of the tongue pieces 9 and 9 of the inner weight 2, the central portion thereof is lifted by the crane of the crane car itself, and the inner weight 2 is attached to the central portion of the chassis. It will be placed at the counterweight temporary placement position.
At this time, the inner weight 2 is placed at the temporary placement position so that the mounting surfaces 101a and 101a of the inner weight 2 face the direction in which the turning body is located, that is, the rearward direction of the vehicle.

  Next, the rope is re-hanged on the holes 15 and 15 for attaching the hanging ropes of the tongue pieces 10 and 10 which function as the suspension parts for the hanging ropes of the outer weight 3, and the central part is lifted by the crane of the crane vehicle itself. Further, the crane of the crane vehicle itself is operated so that the outer weight 3 is gradually directed from the rear of the inner weight 2 toward the inner weight 2 in a state where the mounting surfaces 101b, 101b of the outer weight 3 are directed to the back surface of the inner weight 2. The outer weight 3 is attached to the inner weight 2 so that the step 6 of the outer weight 3 is hooked on the step 5 of the inner weight 2.

  Then, the pins 12, 12 are inserted into the holding pin insertion holes 13, 13 provided in the tongue pieces 9, 9 of the inner weight 2, and the tip portions thereof are substantially circles formed on the upper end surfaces 3 a, 3 a of the outer weight 3. By fitting into the arc-shaped grooves 14, 14, the outer weight 3 is prevented from being lifted with respect to the inner weight 2 in the combined state, and the dowel-shaped protrusion on the tongue piece 9 side is provided with the lug 16 provided on the pin 12 side. The pin 12 is prevented from dropping from the presser pin insertion hole 13 by attaching the fixture 17 to the dowel-shaped protrusion through the hole.

  Next, the swing body of the mobile crane is rotated 180 ° so that the boom is directed rearward in the vehicle traveling direction, the mounting position of the rear surface of the swing body is made to face the mounting surfaces 101a and 101b of the counterweight portion 4, and the counterweight is mounted. By actuating the hydraulic cylinder, the mounting base provided on the inner weight 2 and the counterweight mounting hydraulic cylinder on the revolving structure side are engaged, and the counterweight section 4 is mounted on the back of the revolving structure of the mobile crane vehicle. become.

  In addition, the operation of removing the counterweight portion 4 from the rear surface of the revolving body of the mobile crane vehicle is performed by operating the counterweight attaching / detaching device with the boom directed rearward in the vehicle traveling direction, so that the removed counterweight portion 4 is removed. Is automatically lowered to the counterweight temporary storage position in the center of the chassis of the crane truck.

Here, when the inner weight 2 and the outer weight 3 are divided and loaded on the track, first, the fixing members 17 and 17 are removed from the dowel-shaped projections provided on the tongue pieces 9 and 9 of the inner weight 2, and the holding pins are removed. The pins 12 and 12 are pulled out from the insertion holes 13 and 13.
Then, the swivel body of the mobile crane is rotated to redirect the boom forward in the vehicle traveling direction, and for attaching the hanging ropes of the tongue pieces 10 and 10 that function as the hanging rope locking portions of the outer weight 3. A rope is connected to the holes 15 and 15, the central part thereof is lifted by the crane of the crane truck itself, the outer weight 3 is removed from the inner weight 2, and the crane is further operated to attach the outer weight 3 to the first truck. To load.

  Next, the rope is re-hanged to the holes 11 and 11 for attaching the hanging ropes of the tongue pieces 9 and 9 that function as the suspension parts for the hanging ropes of the inner weight 2, and the central part is lifted by the crane of the crane vehicle itself. The inner weight 2 is placed on the loading platform of the second truck.

  As described above, according to this embodiment, the operation of removing the outer weight 3 from the inner weight 2 or attaching the outer weight 3 to the inner weight 2 is not required, and the bolt 12 is not attached or detached. Since it is realized by an extremely simple work such as lifting and lowering the outer weight 3, the assembling work and the dividing work can be smoothly performed.

  Further, the inner weight 2 and the outer weight 3 which are constituent elements of the counterweight portion 4 are configured by dividing the counterweight portion 4 in the front-rear direction, that is, the inner weight 2 positioned on the side closer to the mounting position on the back of the revolving structure The structure is divided into outer weights 3 located on the side far from the mounting position on the back of the body, and special parts protrude from the mounting surfaces 101a and 101b of the counterweight portion 4 that abuts on the back of the swivel body. Since no parting line is formed, it is easy to make the shape of the mounting surfaces 101a and 101b follow the shape of the mounting position, especially at the mounting position to be mounted. This is suitable for a counterweight mounting structure in which the mounting surface of the counterweight portion 4 is mounted so as to be hooked or hung.

In addition, in this embodiment, the thickness and shape of each part of the inner weight 2 and the outer weight 3 are integrated as in the construction counter weight device 100 of FIG. 2 by combining the inner weight 2 and the outer weight 3. The normal weight V4 from the center of gravity G4 of the counterweight portion 4 to the plane including the upper end surface 2a of the inner weight 2 and the intersection G4 ′ between the plane and the inner weight 2 from the center of gravity G2 of the inner weight 2 as a single unit 2, the perpendicular line V <b> 2 toward the plane including the upper end surface 2 a coincides with the intersection point G <b> 2 ′ of the plane, and is included by the virtual plane region between the upper end surfaces 2 a and 2 a and the intermediate weight 2 The coincident intersections G4 ′ and G2 ′ are positioned inside, and the left and right upper end surfaces 2a and 2a of the inner weight 2 are formed by tongues 9 and 9, respectively. Two suspension rope locking portions are provided so that the centroid G9 of the tongue pieces 9 and 9 and the coincident intersections G4 ′ and G2 ′ coincide with each other. The center of gravity G4 and G2 have the same perpendicular lines V4 and V2 even when the counterweight portion 4 is integrated by combining the outer weight 3 and the outer weight 3 or when the inner weight 2 is divided into a single unit. The centroid G9 (the same applies to the intersections G4 ′ and G2 ′) of the tongue pieces 9 and 9 is located above the center of gravity G4 and G2 along the perpendicular lines V4 and V2. Therefore, the inner weight 2 and the outer weight 3 can be obtained by connecting the rope to the suspension rope mounting holes 11, 11 provided in the tongue pieces 9, 9 and lifting the central portion thereof with a crane or the like. Combined to form counterweight 4 Regardless of whether the inner weight 2 or the inner weight 2 is divided into a single unit, the counterweight portion 4 and the inner weight 2 are not balanced and the counter position is maintained as shown in FIG. The weight part 4 and the inner weight 2 can be stably lifted (see paragraphs 0031 and 0037).
Therefore, the user simply remembers to use the suspension rope attachment holes 11 and 11 provided in the tongue pieces 9 and 9 which are the suspension portions for the suspension rope of the inner weight 2 with priority. What is necessary is to reduce the probability of occurrence of an operation error such as erroneously selecting a hanging rope locking portion used for the lifting operation.
Even when only the inner weight 2 is lifted or when the counterweight portion 4 in which the inner weight 2 and the outer weight 3 are combined is lifted, the holes 11 and 11 for attaching the hanging rope are formed regardless of the situation. This is because a well-balanced lifting work can be realized by using this.

Further, in this embodiment, the thickness and shape of each part of the inner weight 2 and the outer weight 3 are planes including the upper end surface 3a of the outer weight 3 from the center G3 of the outer weight 3 as a single unit. An intersecting point G3 ′ between the perpendicular line V3 and the plane is configured to substantially coincide with the coincident intersecting points G4 ′ and G2 ′ in a state where the outer weight 3 is attached to the inner weight 2. On the upper end surfaces 3a, 3a, there are two suspension portions for hanging ropes formed by the tongue pieces 10, 10, respectively, and the outer side where the centroid G10 combining these tongue pieces 10, 10 is a single body. Tongue pieces 9 on the left and right upper end surfaces 2a, 2a of the inner weight 2 so as to coincide with an intersecting point G3 'between the perpendicular line V3 extending from the center of gravity G3 of the weight 3 to the plane including the upper end surface 3a of the outer weight 3 and the plane. , Outside of 9 The intersection G3 ′ between the perpendicular line V3 and the plane extending from the center of gravity G3 of the outer weight 3 divided into a single unit to the plane including the upper end surface 3a of the outer weight 3 is the outer weight. 3 is attached to the inner weight 2 and is located slightly behind the coincident intersections G4 ′ and G2 ′ (the same applies to the centroid G9), that is, slightly to the right in FIG. ', G2' and the centroid G10 do not completely coincide, but the positional deviation is a few centimeters, for example, a few centimeters. Therefore, the inner weight 2 and the outer weight 3 are combined and integrated into a counter. Even if the tongue pieces 10 and 10 are selected instead of the tongue pieces 9 and 9 under the condition of the weight part 4 and the central part of the rope connected to these tongue pieces 10 and 10 is lifted by a crane or the like, Weight portion 4 is only inclined slightly counterclockwise in FIG. 1 from the orientation of the positive stationary state as shown in FIG. 1 (see paragraph 0038,0040).
Therefore, as long as the pins 12 and 12 have sufficient strength to suspend the inner weight 2, the outer weight 3 is suspended when the counterweight portion 4 including the inner weight 2 and the outer weight 3 is lifted. Even if the suspension rope attaching holes 15 and 15 provided in the tongue pieces 10 and 10 which are the locking portions for the rope are used, the counterweight portion 4 can be lifted in a balanced manner.
Therefore, in the case where such a configuration is applied, the user can attach the suspension rope mounting holes 11 provided in the tongue pieces 9 and 9 that are the suspension portions for the suspension rope of the inner weight 2. It is not necessary to memorize that 11 is used preferentially, and either one of the tongue pieces 9, 9 or the tongue pieces 10, 10 arranged symmetrically with respect to the center thereof on the upper surface of the counterweight portion 4 By selecting a set and hanging it with a rope, the balance work can be performed even when only the inner weight 2 is lifted or when the counterweight portion 4 combining the inner weight 2 and the outer weight 3 is lifted. A good lifting work can be realized, and the inconvenience associated with erroneous selection of the suspension part for the hanging rope used for the lifting work can be almost completely eliminated.

  A part or all of the embodiment disclosed above can be appropriately expressed by the description shown in the following supplementary notes, but the form for carrying out the invention and the technical idea of the invention are not limited to these. Absent.

For example, the weight which is a component of the counterweight portion 4 is divided in the front-rear direction such as the inner weight 2 and the outer weight 3, that is, the weight positioned on the side close to the mounting position of the revolving unit back and the back of the revolving unit It is an essential requirement to divide into weights located on the side far from the mounting position, and in the above-described embodiment, only the configuration in which the counterweight portion 4 is divided into two is shown, but the configuration of the counterweight portion 4 is shown. May be divided into three or more in the front-rear direction.
Even when another outer weight is attached to the outside of the outer weight 3 as the second-stage outer weight, the above-described inner weight 2 and outer weight are attached to the outer weight 3 and the second-stage outer weight. It is possible to divert the same attachment structure between 3 as it is.

[Appendix 1]
The hanging rope locking portions (9, 9) are installed in at least two places on the upper end surfaces (2a, 3a), and the inner wall surfaces (101a, 101b) facing the equipped construction machine are formed in a concave shape. In the construction machine counterweight device (1) having the counterweight section (4),
The counterweight portion (4) is divided into an inner weight (2) and an outer weight (3), and the outer weight (3) is held around the upper end of the inner weight (2). A step (5) is provided,
A locked step (6) locked by the holding step (5) of the inner weight (2) is provided on the inner wall surface of the outer weight (3),
Either the holding step (5) of the inner weight (2) or the locked step (6) of the outer weight (3) has the outer weight (3) with respect to the inner weight (2). ) Is provided with a projection (7) for preventing displacement, and the other is provided with an engagement hole (8) for engaging with the projection (7). 1).
This configuration can be easily divided and assembled without using bolts, and is suitable for a mounting structure that hooks the mounting surface on the back of the construction equipment or hangs it on the back of the construction equipment. An object of the present invention is to provide a construction machine counterweight device.

[Appendix 2]
In the construction machine counterweight device (1) according to attachment 1,
The hanging rope locking portions (9, 9) are installed on the inner weight (2) at the same distance in the opposite direction from the center of gravity (G4) of the counterweight portion (4). A construction machine counterweight device (1).
In addition to the purpose described in Supplementary Note 1, this configuration can appropriately select the suspension portion for the suspended rope, regardless of whether it is in a divided state or an assembled state. An object of the present invention is to provide a counterweight device for construction equipment that can be lifted using a lower rope locking portion without breaking the balance.

[Appendix 3]
In the construction machine counterweight device (1) according to attachment 2,
A U-shaped cut portion having an upper opening is provided at each central portion of the inner weight (2) and the outer weight (3),
The counterweight device for a construction machine, wherein the hanging rope locking portions (9, 9) are installed on the upper end surface (2a) of the inner weight (2) adjacent to the U-shaped cut portion. (1).

[Appendix 4]
In the construction machine counterweight device (1) according to attachment 1,
The inner weight (2) and the outer weight (3) are formed in a U-shape with the left end portion opened in a plan view, and the holding step (5) is formed in the U-shape. A counterweight device for construction equipment (1), wherein the counterweight device (1) is provided on the outer side of each bent portion at one end and the other end of the inner weight (2).
If such a configuration is applied, since the holding step (5) is divided into two hands, the balance of the counterweight (4) is improved, the center of gravity is stabilized, and this is mounted on the construction machine. This can contribute to the stable operation of construction equipment.
Further, if the entire weight is concentrated on the center of gravity, a slight misalignment of the center of gravity tends to break the balance during operation of the construction machine, resulting in an unstable operation. However, such inconvenience can be improved.

[Appendix 5]
In the counterweight device for construction machine (1) according to appendix 4,
Two protrusions (7) provided on each holding step (5) are provided on each holding step (5), and two protrusions (7) are provided on the same surface. A construction machine counterweight device (1) characterized in that it is installed at a distant position.
Although the displacement of the outer weight (3) is not normally possible, this configuration takes into account the displacement that occurs when an unexpected abnormal moment occurs due to a sudden stop or earthquake vibration during operation of the construction equipment. The protrusions (7) are arranged at positions about 90 ° apart from each other so that the outer weight (3) is not displaced even in the event of an abnormality.

[Appendix 6]
In the construction machine counterweight device (1) according to any one of appendices 1 to 5,
Holding pins (9) for restraining vertical movement of the outer weight (3) generated when the counterweight (4) is moved to the suspension portions (9, 9) for the suspension rope of the inner weight (2). 12) A construction machine counterweight device (1).

[Appendix 7]
In a construction machine counterweight device (1) comprising a block (4) having a mounting surface (101a, 101b) formed to follow the shape of the mounting position on the back of a construction machine to be mounted,
The lump (4) has an inner weight (2) positioned closer to the mounting position in the mounted state, a lower end surface (2b) and an upper end surface (2a) of the inner weight (2), and the mounting surface. (101a) except for the outer weight (3) surrounding the inner weight (2) from the outside,
The inner weight (2) includes the outer weight between each of the surfaces adjacent to the upper end surface (2a) of the inner weight (2) except the mounting surface (101a) and the upper end surface (2a). A step portion (5) for holding a weight (3) is formed, while the outer weight (3) has an inner weight on a portion of the upper end portion of the outer weight (3) excluding the mounting surface. A step (6) that fits with the step (5) of (2) is formed,
The position of the outer weight (3) relative to the inner weight (2) on either the upper surface of the step (5) in the inner weight (2) or the lower surface of the step (6) in the outer weight (3) While the convex portion (7) for preventing the shift is provided, a concave portion (8) fitted to the convex portion (7) is formed on the other side,
The bulky body (4) in a state where the thickness and shape of each part of the inner weight (2) and the outer weight (3) are at least a combination of the inner weight (2) and the outer weight (3). The perpendicular (V2) from the center of gravity (G4) to the plane including the upper end surface (2a) of the inner weight (2) and the intersection (G4 ′) between the plane and the inner weight (2) as a single body The perpendicular (V2) from the center of gravity (G2) to the plane including the upper end surface (2a) of the inner weight (2) coincides with the intersection (G2 ′) of the plane, and the inner weight (2 ) In the plane encompassed by the upper end surface (2a), the coincident intersection point (G4 ′, G2 ′) is located.
At least on the upper end surface of the inner weight (2), one or more hanging rope locking portions (9, 9) are integrated with the hanging rope locking portions (9, 9). A construction machine counterweight device (1), characterized in that (G9) and the coincident intersections (G4 ′, G2 ′) coincide with each other.
This structure can be easily divided and assembled without using bolts, and appropriately selects the suspension portion for the suspended rope regardless of whether it is in a divided state or an assembled state. In addition, the lifting operation can be performed without losing the balance using the selected suspension portion for the suspension rope, and in particular, the attachment surface can be hooked on the back of the construction machine or suspended from the back of the construction machine. It is an object of the present invention to provide a construction machine counterweight device suitable for the mounting structure.
The principle of operation of this configuration is as described in paragraphs 0031 and 0037. The main effect produced by this configuration is as described in paragraph 0067. First, the tongue piece (9, 9) is directly applied. By connecting the rope to the hole (11, 11) for attaching the hanging rope provided at the center and lifting the central part with a crane or the like, the inner weight (2) and the outer weight (3) are combined and the counter Regardless of whether the weight portion (4) or the inner weight (2) is divided into a single unit, the counterweight portion (4) and the inner weight (2) can be placed in the correct position without breaking the balance. It is possible to stably lift the counterweight part (4) and the inner weight (2) while maintaining the posture. Finally, the suspension part for the suspension rope used for the lifting work is provided. The probability of occurrence of operational error, such as the selection is greatly reduced, a thing called.

[Appendix 8]
The thickness and shape of each part of the inner weight (2) and the outer weight (3) are further determined from the center of gravity (G3) of the outer weight (3) as a single unit to the upper end surface of the outer weight (3) ( 3a), the intersection (G3 ′) between the perpendicular (V3) toward the plane including the plane and the plane (G3 ′) with the outer weight (3) attached to the inner weight (2) (G4 ′, G2 ') and is configured to match
Two or more suspension rope locking portions (10, 10) are provided on the upper end surface (3a) of the outer weight (3). The intersection (G3 ′) of the perpendicular (V3) from the center of gravity (G3) of the outer weight (3) with the integrated centroid (G10) as a single unit to the plane including the upper end surface (3a) of the outer weight and the plane ) And is provided at a position outside the one or more suspension rope locking portions (9, 9) on the upper end surface (2a) of the inner weight (2). The counterweight device for construction machinery (1) according to appendix 7.
This configuration is capable of appropriately selecting the suspension portion for the suspended rope, particularly in the divided state or the assembled state, among the purposes described in Appendix 7, and for the selected suspended rope The purpose of this is to achieve the lifting work at a higher level by using the locking part without breaking the balance.
The principle of operation of this configuration is as described in paragraphs 0038 and 0040, and the main effect produced by this configuration is as described in paragraph 0068. First, directly, the inner weight (2) and the outer side. A hole for attaching a hanging rope provided on a tongue piece (10, 10) which is a locking portion for the hanging rope of the outer weight (3) when the counterweight portion (4) combined with the weight (3) is lifted Even if (15, 15) is used, it is possible to lift the counterweight portion (4) in a balanced manner. Finally, an error in the locking portion for the hanging rope used for the lifting work can be obtained. The inconvenience associated with the selection can be almost completely eliminated.

[Appendix 9]
The suspension portion (9, 9) for the hanging rope of the inner weight (2) is a tongue piece (9, 9) fixed at a position close to the step portion (5) of the inner weight (2). Consists of holes drilled in the upper end,
A presser pin insertion hole (13, 13) for inserting a pin (12, 12) for pressing the upper end surface (3a) of the outer weight (3) is formed at the base of the tongue piece (9, 9). The counterweight device for construction equipment (1) according to any one of Supplementary Note 7 and Supplementary Note 8, wherein the construction machine counterweight device (1) is provided.
This configuration is an embodiment related to Appendix 7 and Appendix 8. The structure for preventing the outer weight (3) from being lifted with respect to the inner weight (2) in the combined state is not particularly limited. However, when such a configuration is applied, the pressing pin is attached to the tongue pieces (9, 9). Since the object can be achieved by a simple process of drilling the insertion holes (13, 13), for example, the outer weight (3) is lifted through a pin passing through the inner weight (2) and the outer weight (3). Compared to the case of applying a structure that prevents the inner weight (2) and the outer weight (3) from being drilled, a structure for preventing the inner weight (2) and the outer weight (3) is applied. There is an advantage that the machining process is simplified.

DESCRIPTION OF SYMBOLS 1 Counterweight apparatus 2 for construction machines Inner weight 2a Upper end surface 2b of inner weight Lower end surface 3 of inner weight Outer weight 3a Upper end surface 4 of outer weight Counter weight part (lump body)
5 Inner weight step (holding step)
6 Outer weight step (locked step)
7 Frustum type pin (convex part)
8 Tapered hole (concave)
9 Tongue piece (Inner weight suspension part for hanging rope)
10 Tongue piece (locking part for hanging rope of outer weight)
11 Hole for attaching hanging rope 12 Pin for holding the upper end surface of outer weight 13 Holding pin insertion hole 14 Groove portion 15 Hole for attaching hanging rope 16 Lug 17 Fixing tool 18 Weight receiver (for height adjustment)
100 Counterweight device for construction equipment (known example)
101 Mounting surface 101a Mounting surface 101b Mounting surface 102 Recessed portion 103 Bottom surface 104 Stepped portion 104a Projecting portion 105 Notch 106 Notched portion 107 Pin that functions as a hanging rope locking portion (known example)
G2 Center of gravity of the inner weight G2 ′ as a single unit G3 ′ Single point of the outer weight as a single unit G3 Intersection of a perpendicular line from the center of gravity of the inner weight as a single unit to the plane including the upper end surface of the inner weight A perpendicular line extending from the center of gravity of the outer weight to the plane including the upper end surface of the outer weight and the intersection point G4 with the inner weight and the outer weight. Intersection G9 perpendicular to the plane including the upper end surface of the inner weight from the center of gravity of the counterweight portion in a state where the outer weights are combined and integrated with each other. G10 Center of centroid V2 that combines the locking parts for the hanging rope of the outer weight V2 Inside from the center of gravity of the inner weight that is a single unit A perpendicular line V3 toward the plane including the upper end surface of the eight line V4 extending from the center of gravity of the outer weight as a single unit to the plane including the upper end surface of the outer weight The counterweight portion in a state in which the inner weight and the outer weight are combined and integrated Perpendicular from the center of gravity to the plane containing the top edge of the inner weight

Claims (2)

In the counterweight device for construction equipment having a counterweight portion in which the inner wall surface facing the construction equipment to be equipped is installed in the at least two places on the upper end surface and the inner wall surface facing the construction equipment is formed in a concave shape,
The counterweight part is divided into an inner weight and an outer weight, and a holding step for holding the outer weight is provided around the upper end of the inner weight.
A locked stepped portion that is locked by the holding step portion of the inner weight is provided on the inner wall surface of the outer weight,
While one of the holding step portion of the inner weight and the locked step portion of the outer weight is provided with a protrusion for preventing the outer weight from being displaced relative to the inner weight, the other is provided with the protrusion A counterweight device for construction equipment, characterized in that an engagement hole for engaging with a protrusion is provided. The construction machine counterweight device according to claim 1,
The counterweight device for a construction machine, wherein the suspension portions for the suspension ropes are installed on the inner weights at the same distance in the opposite direction from the center of gravity of the counterweight portion.

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