JP6376193B2 - Arm support structure - Google Patents

Description

The present invention relates to an arm support structure and related technology.

  Conventionally, a posture holding device that holds the posture of the subassembly for dismantling work has been proposed (for example, Patent Document 1). In Patent Document 1, the disassembly work subassembly (10) is fixed to the posture holding device (21), and the common boom (8) is connected in a state where the base end side of the joint boom (11) is held at a constant height. (FIG. 8). For this reason, shaking of the joint boom (11) at the time of a connection operation | work is prevented.

JP 11-193543 A

  By the way, in the dismantling machine, the first boom connected to the machine body, the short inter boom connected to the tip of the first boom, the second boom connected to the tip of the inter boom, and the tip of the second boom There are those provided with an arm connected to the as a work attachment.

  When transporting such a dismantling machine, the second boom may be separated from the inter boom and the second boom and the arm connected to the second boom may be transported integrally. At that time, the second boom is placed on the placement surface, and the arm is bent greatly toward the second boom side by the contraction of the arm cylinder, and is arranged on the upper side of the second boom. At this time, the arm load is applied to the arm cylinder arranged on the arm proximal end side, and a large load is applied to the arm cylinder.

  Thus, it is conceivable to apply the posture holding device (21) described in Patent Document 1 to support the arm and reduce the load on the arm cylinder.

  However, the posture holding device (21) described in Patent Document 1 is configured to be placed directly on the ground, and the height of the joint boom (11) may not be stable depending on the ground conditions.

  Therefore, the present invention provides an arm support structure capable of supporting an arm in a more stable state when a boom and an arm disposed on the upper side of the boom are integrally transported in a construction machine having an ultralong attachment. With the goal.

  In order to achieve the above object, the present invention provides a work attachment for a construction machine including a boom and an arm that is pivotally connected to the boom, the boom mounted such that a back surface faces a mounting surface. And an arm support structure that supports the tip of the arm and is mounted on the abdominal surface of the boom. A boom mounting member including a protruding portion that protrudes downward along the left and right side surfaces so as to sandwich the left and right side surfaces of the boom; and an extending member that extends upward from the boom mounting member. And an extending member having a pin hole for connecting to the tip of the arm with a connecting pin.

  The extension member is connected to a flange projecting outward from the left and right side surfaces of the boom, and the arm support structure is configured such that the upper end side is connected to the flange and the lower end side is in contact with the mounting surface. It is preferable to further provide a member.

  Further, the flange is formed of a plate member, and the flange is formed with a long hole that is elongated in the vertical direction and is used to adjust a position to connect the upper end side of the auxiliary member. Is preferred.

  Moreover, it is preferable that a part of the upper end side of the elongated hole is formed wider than the other part of the elongated hole.

  Moreover, it is preferable that the said auxiliary member contains the control surface which contact | abuts to the protrusion side edge part of the said flange, and controls the movement to the inner side of the said boom.

  Moreover, it is preferable that the lower end of the projecting portion is provided with a ground plate for grounding the mounting surface when the arm is mounted alone.

  ADVANTAGE OF THE INVENTION According to this invention, in a construction machine provided with an ultra-long attachment, it is possible to support an arm in a more stable state when the boom and the arm arranged on the upper side of the boom are transported integrally.

The side view which shows the demolition machine by embodiment of this invention. The side view which shows a part of the front end side of an attachment. The perspective view which shows an arm support stand. The side view which shows an arm support stand. The V arrow line view of FIG. The figure which shows a mode that an arm support stand supports an arm independently. The perspective view which shows an arm support stand and the auxiliary stand which supports it. VIII arrow directional view of FIG. The side view which shows an auxiliary | assistant mount frame. X arrow line view of FIG. The enlarged view to which the one part area | region of FIG. 10 was expanded. The figure which shows a mode that an arm rotates centering on an arm support frame.

<1. Embodiment>
An arm support structure according to an embodiment of the present invention will be described with reference to FIGS. Hereinafter, as an example of the construction machine according to the present invention, the dismantling machine 1 shown in FIG. 1 is illustrated. In each drawing, the longitudinal direction and the lateral direction of the machine are appropriately defined as necessary.

  As shown in FIG. 1, the dismantling machine 1 is attached to a lower traveling body 2, an upper revolving body 3 that is pivotably mounted on the lower traveling body 2 around a vertical axis, and a front portion of the upper revolving body 3. And the work attachment 4 provided.

  The work attachment 4 is configured as an ultra-long attachment, and includes a proximal end side boom 5, an inter boom 6, a distal end side boom 7, and an arm 8.

  The base end side boom 5 is composed of a plurality of separable boom bodies, and is attached to the upper swing body 3 so as to be raised and lowered.

  The inter boom 6 is attached to the distal end portion of the base end side boom 5 so as to be rotatable about a horizontal axis.

  The front end side boom 7 is attached to the front end of the inter boom 6 so that the rear end portion thereof is rotatable about a horizontal axis.

  The arm 8 is attached so that the rear end of the arm 8 can rotate about a horizontal axis with respect to the front end of the front end boom 7. A crushing device composed of a nibler or the like can be attached to the tip of the arm 8.

  When transporting the work attachment 4, as shown in FIG. 1, the base end side boom 5 is disposed on the upper side and the front end side boom 7 is disposed on the lower side with the inter boom 6 as a boundary. An arm 8 is disposed between the base end side boom 5 and the front end side boom 7. As a result, the work attachment 4 is folded into four folded states and placed on the ground.

  Thereafter, as shown in FIG. 2, the distal boom 7 is separated from the inter boom 6 while the distal boom 7 and the arm 8 are folded.

  Between the front end side boom 7 and the arm 8, an arm cylinder 9 for rotating the arm 8 around a horizontal axis is provided. The base end side (base end of the cylinder tube) of the arm cylinder 9 is connected to the front end side so as to be slightly rotatable from the center of the belly surface 7B of the front end side boom 7. Further, the distal end side of the arm cylinder 9 (the distal end of the cylinder rod) is rotatably connected to the proximal end side of the abdominal surface 8B of the arm 8.

  As shown in FIG. 2, at the time of transportation, the front end side boom 7 is placed such that the back surface 7 </ b> A faces the ground (mounting surface). That is, during transportation, the rear surface 7A of the distal end side boom 7 faces downward, and the abdominal surface 7B of the distal end side boom 7 faces upward.

  Further, when the arm cylinder 9 contracts, the arm 8 is disposed at a position (position shown in FIG. 2) where the abdominal surface 8B is opposed to and close to the abdominal surface 7B of the distal boom 7. That is, during transportation, the arm 8 bends approximately 180 degrees with respect to the distal end boom 7. Therefore, during transportation, the abdominal surface 8B of the arm 8 faces downward, and the back surface 8A of the arm 8 faces upward.

  By the way, in the state shown in FIG. 2, if nothing is provided between the arm 8 and the tip side boom 7, the load of the arm 8 is applied to the arm cylinder 9 in the contracted state. In particular, depending on vibration during transportation, a relatively large load may be applied to the arm cylinder 9, which is not preferable.

  Therefore, in the present embodiment, the arm support frame 10 that supports the distal end of the arm 8 is installed between the distal boom 7 and the arm 8 during transportation. Further, the arm support base 10 is provided with an auxiliary base 20 for preventing the arm support base 10 from falling off. Hereinafter, the arm support frame 10 and the auxiliary frame 20 will be described in detail. The arm support frame 10 and the auxiliary frame 20 are examples of the arm support structure according to the present invention.

  As shown in FIGS. 3 and 4, the arm support base 10 includes a pair of boom placement members 11 placed at intervals in the extending direction of the distal end side boom 7, and a pair of boom placement members 11 on the upper side. And a pair of vertical plates 13 extending in the direction.

  As shown in FIG. 5, the boom mounting member 11 includes a mounting portion 11 a extending in the width direction of the distal end side boom 7 and a protruding portion 11 b protruding downward from the left and right ends of the mounting portion 11 a. It is configured in a U shape. The protruding portion 11b protrudes downward along the left and right side surfaces so as to sandwich the left and right side surfaces of the distal end side boom 7 in a state where it is placed on the abdominal surface 7B of the distal end side boom 7 (FIG. 3).

  A ground plate 110 is provided at the lower end of the protruding portion 11b. The ground plate 110 is a portion that contacts the ground when the arm 8 is placed alone (see FIG. 6). As shown in FIGS. 3 and 4, the ground plate 110 has a front end and a rear end slightly inclined upward, and is formed in a cross-sectional dish shape.

  As shown in FIGS. 3 and 4, the pair of vertical plates 13 is a plate member having a substantially triangular shape when viewed from the side, and is erected on the pair of boom mounting members 11. In addition, a pair of vertical board 13 is an example of the extending member which concerns on this invention.

  As shown in FIG. 4, the pair of vertical plates 13 are formed with pin holes 13 h for inserting the connecting pins 130 shown in FIG. 3. The pair of vertical plates 13 is pivotally connected to the tip of the arm 8 by inserting the connecting pin 130 shown in FIG.

  As shown in FIGS. 3 to 5, a pair of flanges 15 projecting outward from the side surface 7 </ b> C (FIG. 7) of the distal end side boom 7 are connected to the vertical plate 13 so as to be orthogonal to each other. As shown in FIG. 5, the flange 15 is formed with a long hole 15 h that is long in the vertical direction. A part of the upper end of the elongated hole 15h is formed wider than the other part.

  As shown in FIGS. 7 and 8, the arm support base 10 is provided with an auxiliary base 20 through a long hole 15 h formed in the flange 15. The auxiliary gantry 20 is an example of an auxiliary member according to the present invention.

  The auxiliary gantry 20 includes a T-shaped member 21 placed on the ground, a main leg member 23 extending upward from the intersection of the T-shape of the T-shaped member 21, and the main leg member 23 from three ends of the T-shaped member 21. And three auxiliary leg members 25 extending obliquely upward toward the top.

  As shown in FIGS. 9 to 11, a connection plate 230 is provided on a surface 231 of the main leg member 23 that faces the side surface 7 </ b> C of the distal boom 7. As shown in FIG. 9, a connection hole 230 h is formed in the connection plate 230. The connection plate 230 is disposed between the pair of flanges 15 and is attached to the arm support base 10 by connection pins through the connection holes 230h and the long holes 15h.

  As a procedure for connecting the auxiliary gantry 20, first, the connection hole 230h is aligned with the upper end (the wide portion shown in FIG. 5) of the elongated hole 15h, and the connection pin is inserted. Thereafter, the auxiliary mount 20 is gradually lowered through the long hole 15h, and when the T-shaped member 21 of the auxiliary mount 20 contacts the ground, the connection plate 230 and the pair of flanges 15 are connected by the connection pins.

  Through this procedure, the connection pin can be easily inserted through the upper end (wide portion) of the long hole 15h. Therefore, assembly of the auxiliary gantry 20 is easy, and rattling of the auxiliary gantry 20 is reduced. In addition, by using the long hole 15h that is long in the vertical direction, it is possible to appropriately adjust the height at which the auxiliary mount 20 is connected according to the state of the ground (the undulation and unevenness of the ground).

  FIG. 11 is an enlarged view of the area AR shown in FIG. As described above, the main leg member 23 includes the surface 231 that faces the side surface 7 </ b> C of the distal end side boom 7. In addition, when the auxiliary mount 20 is mounted, the connection plate 230 orthogonal to the surface 231 is disposed between the pair of flanges 15. Here, when the distal end side boom 7 is lifted, a force to rotate toward the distal end side boom 7 about the connection hole 230h acts on the auxiliary mount 20. However, in the present embodiment, the presence of the surface 231 of the main leg member 23 causes the protruding end portions of the pair of flanges 15 to contact the surface 231, so that the auxiliary mount 20 does not need to rotate. The surface 231 is an example of a restriction surface according to the present invention.

  Further, as described above, the arm support base 10 is pivotally connected by the connecting pin 130 at the tip of the arm 8. Therefore, as shown in FIG. 12, it is possible to suspend the arm 8 with a crane around the arm support base 10 and rotate it in the arrow direction. As a result, the arm 8 can be transited from the state ST1 during transportation to the state ST3 during assembly through the state ST2.

  As described above, according to the present embodiment, when the front end boom 7 and the arm 8 disposed above the front end boom 7 are transported integrally, the arm support is provided between the front end boom 7 and the arm 8. Since the gantry 10 is installed, the arm 8 can be supported in a more stable state.

  Moreover, the boom mounting member 11 includes a protruding portion 11b (FIG. 5) that protrudes downward along the left and right side surfaces so as to sandwich the left and right side surfaces of the distal end side boom 7. Therefore, even if a force in the width direction of the distal end side boom 7 acts on the arm support gantry 10, the projecting portion 11 b contacts the left and right side surfaces of the distal end side boom 7 and prevents the arm support gantry 10 from falling off.

  Further, according to the present embodiment, since the auxiliary mount 20 is attached to the arm support mount 10, the arm support mount 10 can be prevented from falling off from the abdominal surface 7 </ b> B of the distal end side boom 7. Moreover, since the auxiliary | assistant mount 20 is comprised so that a division | segmentation is possible as a member different from the arm support mount 10, the storage space at the time of unused is reduced.

  In addition, according to the present embodiment, as shown in FIGS. 3 and 4, since the ground plate 110 is provided at the lower end of the projecting portion 11 b, the arm support base 10 is used when the arm 8 is transported alone. Also functions as a gantry for supporting the arm 8.

  Furthermore, since the arm support base 10 is pivotally connected to the tip of the arm 8, as shown in FIG. 12, the rotation axis of the arm 8 is reversed when the state ST1 during transportation is reversed to the state ST3 during assembly. Can also be used.

<2. Modification>
The arm support structure according to the present invention is not limited to the embodiment, and various modifications and improvements can be made within the scope described in the claims.

  For example, in the above embodiment, as illustrated in FIG. 5, the case where a part of the upper end of the long hole 15 h is formed wider than the other part is illustrated, but the upper end of the long hole 15 h is not necessarily wide. There is no need to do this, and the position slightly below the upper end may be formed wider.

  In the above embodiment, the arm 8 is supported by the arm support base 10 and the arm support base 10 is supported by the auxiliary base 20, but the arm support base 10 alone is used without using the auxiliary base 20. 8 may be supported.

  As described above, the arm support structure according to the present invention is suitable for a dismantling machine or the like having an ultralong attachment.

DESCRIPTION OF SYMBOLS 1 Demolition machine 2 Lower traveling body 3 Upper turning body 4 Work attachment 5 Base end side boom 6 Inter boom 7 Front end side boom 7A Rear surface 7B Abdominal surface 7C Side surface 8 Arm 8A Rear surface 8B Abdominal surface 9 Arm cylinder 10 Arm support base 11 Boom mounting member 11a Mounting portion 11b Protruding portion 13 Vertical plate 13h Pin hole 15 Flange 15h Long hole 20 Auxiliary mount 21 T-shaped member 23 Main leg member 25 Auxiliary leg member 110 Ground plate 130 Connecting pin 230 Connecting plate 230h Connecting hole

Claims (6)

In a work attachment for a construction machine including a boom and an arm pivotably connected to the boom, the boom placed so that the back surface faces the placement surface, and a position where the abdominal surface is close to the abdominal surface of the boom An arm support structure that is provided between the arm and the arm pivoted to support the tip of the arm,
A boom mounting member including a protruding portion that protrudes downward along the left and right side surfaces so as to sandwich the left and right side surfaces of the boom in a state of being mounted on the belly surface of the boom;
An extending member extending upward from the boom mounting member, wherein the extending member is formed with a pin hole for connecting to a tip of the arm with a connecting pin;
An arm support structure comprising: The extension member is connected to a flange protruding outward from the left and right side surfaces of the boom,
The arm support structure according to claim 1, further comprising an auxiliary member having an upper end connected to the flange and having a lower end abutting against the mounting surface. The flange is composed of a plate member,
3. The arm according to claim 2, wherein the flange is formed with a long hole that is elongated in the vertical direction and is used to adjust a position where the upper end side of the auxiliary member is connected. 4. Support structure.   4. The arm support structure according to claim 3, wherein a part of an upper end side of the elongated hole is formed wider than another part of the elongated hole.   5. The arm support structure according to claim 2, wherein the auxiliary member includes a restriction surface that abuts on a protruding side end portion of the flange and restricts the movement of the boom inward. .   6. The ground plate for grounding to the mounting surface is provided at the lower end of the projecting portion when the arm is mounted alone. Arm support structure.

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