JP6491485B2 - Full rotation device - Google Patents

Description

  The present invention relates to an all-around rotating device that performs rotational driving around a central axis and downward driving into the ground or the like with respect to a cylindrical body.

  Japanese Patent Application Laid-Open No. 2014-181470 discloses an excavator body that grips a casing for excavation and presses the casing for excavation into the ground by applying rotational and vertical forces to the casing for excavation. An all-round rotary excavator provided with a reaction force device that supports a rotational reaction force and a pushing reaction force generated in the excavator body when the excavating casing is pressed into the ground, and the reaction force device is made of metal There is disclosed an invention of an all-round rotary excavator comprising weights, wherein the weights are detachably attached to the lower surface of a base plate located at the lowest position of the excavator body via attachment means.

  According to the present invention, the weight, which is a reaction force device, is detachably attached to the lower surface of the base plate of the excavator main body by the attaching means. Therefore, even if the weight is attached to the excavator main body, the weight remains outside the excavator main body. Since it does not overhang, even if the installation place is narrow, it is supposed that there is an effect that it can be installed reliably and satisfactorily.

  However, in the all-round rotary excavator of the present invention, a weight having a considerable weight with respect to the weight of the excavator main body is attached to and detached from the lower surface of the base plate located at the lowest position of the excavator main body via an attaching means. Therefore, it is not always easy to support the weight so that its function is sufficiently exerted, especially in the case where a reaction force against pushing in which the casing for excavation is pressed into the ground acts. A large load such as a tensile load is applied to the attaching means for attaching the weight, and there is a problem in terms of ensuring durability. Moreover, there is a difficulty in the efficiency of installation work and withdrawal work.

JP 2014-181470 A

  The present invention does not require a space for a reaction force weight around the apparatus main body and can be used even in a narrow place, while the weight function is effectively exhibited and the weight support structure An object of the present invention is to provide an all-around rotating device that has good durability and excellent workability in installation work and removal work.

(1) A cylindrical body holding unit for vertically holding a target cylindrical body, a rotation driving unit for rotating the cylindrical body held by the cylindrical body holding unit around a central axis, and the cylinder a device body with a vertical driver for down driving the cylinder held in the body holding portion into the ground or the like, comprising a reaction force weights for taking the reaction force of the lower driving of the cylinder all A circumferential rotating device,
The apparatus main body includes a weight support portion that supports the reaction force weight upward at an upper position thereof, and the reaction force weight can be loaded from above and unloaded upward from the weight support portion. Yes,
The reaction force weight can be supported upward at the upper part of the apparatus main body by the weight support part,
The vertical direction driving body has a vertically movable portion that transmits a downward driving force to the cylindrical body via the cylindrical body holding portion, and the reaction force weight is supported upward by the weight support portion, An all-around rotating device, wherein a downward pressing force is loaded directly or indirectly on the vertically movable portion.

  Since the apparatus main body can support the reaction force weight on the upper part of the apparatus main body by the weight support portion, it does not require a space for the reaction force weight around the apparatus main body and is used even in a narrow place. be able to.

  In addition, a weight support portion for supporting the reaction force weight upward is provided at an upper position of the device main body, and the reaction force weight can be loaded from above and unloaded upward from the weight support portion. It is excellent in workability both in the work to install and use the reaction force weight at the required place and the work to unload the reaction force weight and remove the device main body after use. The durability of the part is also good.

  Further, the reaction force weight is supported upward in the weight support part, so that the vertical drive part directly or indirectly to the vertically movable part that transmits the downward driving force to the target cylindrical body via the cylindrical body holding part. Since the downward pressing force is loaded, the reaction force from the cylindrical body that performs the downward driving to the underground or the like can be effectively suppressed from above.

  (2) The height position on the upper side of the weight support part is a position below the height position obtained by adding the axial length of the cylindrical body holding part to the upper height position of the cylindrical body holding part ( 1) All-round rotating device as described.

  The height position of the upper side of the weight support part provided at the upper position of the apparatus main body is a position below the height position obtained by adding the axial length of the cylindrical body holding part to the upper height position of the cylindrical body holding part. For this reason, the reaction force weight can be stably supported by the weight support portion.

  (3) The all-round rotating device according to (1) or (2), wherein an upper end portion of the vertically movable portion of the vertical driving body is a weight support portion that supports the reaction force weight upward.

  In the vertical driving body, the upper end portion of the vertically movable portion that transmits the downward driving force to the target cylindrical body via the cylindrical body holding portion is a weight support portion that supports the reaction force weight upward. The reaction force from the cylindrical body when the body is driven downward to the ground or the like can be more efficiently suppressed from above.

  (4) Of the two regions outside the pair of parallel vertical surfaces that circumscribe the diameter of the cylindrical body on the cylindrical body having the maximum diameter that can be held vertically by the cylindrical body holding portion, the pair of parallel At least a portion of the weight support portion in each of the four regions positioned outside a pair of parallel vertical surfaces perpendicular to the vertical surface and circumscribing the cylindrical body of the maximum diameter with a diameter of the cylindrical body The all-around rotating device according to any one of (1) to (3), wherein:

  The pair of parallel vertical surfaces out of the two regions outside the pair of parallel vertical surfaces circumscribing the diameter of the cylindrical body on the cylindrical body having the maximum diameter that can be held vertically by the cylindrical body holding portion. At least a portion of the weight support portion is located in each of four regions positioned outside a pair of parallel vertical surfaces that are orthogonal to each other and circumscribe the diameter of the cylindrical body. Since the reaction force weight is supported upward in each of the four regions, the reaction force weight can be stably supported.

  (5) From the predetermined position to the side of the apparatus main body, with the reaction force weight supported on the reaction main body and / or the apparatus main body upward at a predetermined position above the apparatus main body by the weight support portion. The all-around rotating device according to any one of (1) to (4), further including a deviation prevention unit that prevents deviation.

  Prevents the reaction force weight and / or the apparatus main body from shifting from a predetermined position to the side of the apparatus main body while the reaction force weight is supported upward at a predetermined position on the upper part of the apparatus main body by the weight support portion. Since the deviation preventing portion is provided, the reaction force weight can be stably supported.

  (6) The reaction force weight opens the cylindrical body insertion portion corresponding to the cylindrical body holding portion, and opens the cylindrical body insertion portion corresponding to the single body used or the cylindrical body holding portion. The all-around rotating device according to any one of (1) to (5), wherein the rotating device is used in layers or in a plurality of layers.

  The reaction force weight opens a cylindrical body insertion portion corresponding to the cylindrical body holding portion and is used singly, or the cylindrical body insertion portion corresponding to the cylindrical body holding portion is opened, single or plural Since they are used in a stacked manner, the work of loading the reaction force weight from above and the work of unloading the reaction weight can be efficiently performed without causing as much as possible the load of the reaction force weight on the apparatus main body.

  In the all-round rotation device of the present invention, the device main body can support the reaction force weight on the upper portion of the device main body by the weight support portion, so that a space for the reaction force weight is required around the device main body. Without using it, it can be used in confined places.

  In addition, a weight support portion for supporting the reaction force weight upward is provided at an upper position of the device main body, and the reaction force weight can be loaded from above and unloaded upward from the weight support portion. It is excellent in workability both in the work to install and use the reaction force weight at the required place and the work to unload the reaction force weight and remove the device main body after use. The durability of the part is also good.

  Further, the reaction force weight is supported upward in the weight support part, so that the vertical drive part directly or indirectly to the vertically movable part that transmits the downward driving force to the target cylindrical body via the cylindrical body holding part. Since the downward pressing force is loaded, the reaction force from the cylindrical body that performs the downward driving to the underground or the like can be effectively suppressed from above.

It is a front view of an all-around rotary excavator. It is a front view of an apparatus main body. It is a side view of an all-around rotary excavator. It is a top view of an all-around rotary excavator. It is a front view of the reaction force weight for the 1st step. It is a side view of the reaction force weight for the 1st step. It is a top view of the reaction force weight for the 1st step. It is a front view of the reaction force weight for the second and subsequent stages. It is a side view of the reaction force weight for the second and subsequent stages. It is a top view of the reaction force weight for the second and subsequent stages.

  [1] An embodiment of the present invention will be described with reference to the drawings.

  The drawings all relate to an all-around rotary excavator as an example of an embodiment of the present invention.

  (1) This all-round rotary excavator A has an apparatus main body B and a reaction force weight.

  (2) The apparatus main body B has a substantially rectangular shape in plan view as a whole, and includes a base frame portion 10, an elevating frame portion 12, a cylindrical body holding portion 14, a rotation driving portion 16, a vertical direction driving body 18 and the like, and a weight. A first weight support portion 20 and a second weight support portion 22 are provided as support portions.

  This apparatus main body B has a vertically penetrating space E through which the target cylindrical body D (casing) can vertically penetrate the inside of the cylindrical body holding portion 14 at the center portion in plan view. The elevating frame portion 12 and the base frame portion 10 each have an upper and lower through hole that constitutes the upper and lower through space E. The apparatus main body B holds a cylindrical body D provided with a bit at the tip in the vertically penetrating space E by a cylindrical body holding section 14 and a central axis line by the rotation driving section 16 with respect to the cylindrical body D. Excavation or cutting of the ground, bedrock, underground structure, or the like can be performed by rotating around and driving downward in the ground by the vertical driving body 18.

  (2-1) The cylindrical body holding portion 14 holds the cylindrical body D vertically by pressing the outer peripheral portion of the cylindrical body D radially inward by a hydraulic cylinder at a plurality of locations in the circumferential direction.

  The cylindrical body holding portion 14 is supported by the lifting frame portion 12 of the apparatus main body B so that the cylindrical body D can be rotated around the vertical rotation axis while the cylindrical body D is fixedly held.

  (2-2) The rotation driving unit 16 is configured to move the cylindrical body holding unit 14 in a state where the cylindrical body D is fixedly held around the central axis in the vertical direction of the cylindrical body D with respect to the lifting frame unit 12 by a hydraulic motor. The cylindrical body D is rotationally driven around the central axis in the vertical direction.

  (2-3) The vertical driving body 18 has a substantially vertical cylindrical shape, and is provided at each of the four corners in the plan view of the apparatus main body B. The lower part of the vertical driving body 18 is fixed to the base frame part 10, and the upper part is a vertically movable part 18 a that is fixed to each of the four corners of the elevating frame part 12. The upper end portion of the vertically movable portion 18a and the vicinity thereof protrude above the elevating frame portion 12.

  The vertical driving body 18 moves the vertical movable part 18a up and down by a hydraulic cylinder, thereby the cylindrical body with respect to the cylindrical body D held by the cylindrical body holding part 14 rotatably supported by the elevating frame part 12. Downward driving and upward driving to the ground or the like can be performed via the holding unit 14. After driving the cylindrical body D downward or upward for a predetermined length, if necessary, the holding of the cylindrical body D by the cylindrical body holding portion 14 is released, and the vertical movable portion 18a is moved upward or downward to again move the cylindrical body holding portion 14 again. After the cylindrical body D is held by the above, the vertical movable portion 18a is moved downward or upward, whereby the cylindrical body D can be further driven downward or driven through the cylindrical body holding portion 14.

  (2-4) The first weight support part 20 and the second weight support part 22 are located at the upper part of the apparatus main body B, and the reaction force weight for taking the reaction force for the downward drive of the cylindrical body D is used as the apparatus main body B. It supports upwards above.

  In the apparatus main body B of this example, four circular horizontal plane upper end portions (upper end portions of the vertical direction drive body 18) projecting above the elevating frame portion 12 in the vertical movable portions 18 a of the four vertical direction drive bodies 18. Four latching protrusions for hanging the apparatus main body, which are first weight support parts 20 and project upward from the lifting frame part 12 at the inner positions of both the vertically movable parts 18a along the long side of the lifting frame part 12. Each upper end portion of the portion 24 is a second weight support portion 22.

The position of the first weight support 20 is
It corresponds to the four corner positions of the rectangular portion in plan view (the entire apparatus main body B) centering on the vertical central axis of the cylindrical body holding portion 14 in the apparatus main body B,
Of the vertical planes passing through the vertical center axis of the cylindrical body holding portion 14, four positions symmetrical to those parallel to the long side or the short side of the apparatus main body B, and a pair symmetrical to the vertical center axis It corresponds to what constitutes two pairs of positions (two-fold rotational symmetry position),
Of the two regions outside the pair of vertical surfaces parallel to the long side of the apparatus main body B circumscribing the cylindrical body with a diameter separated from the largest cylindrical body that can be held vertically by the cylindrical body holding portion 14 The four regions located outside the pair of vertical surfaces parallel to the short side of the apparatus main body B that are orthogonal to the pair of parallel vertical surfaces and circumscribe the cylindrical body of the largest diameter with a diameter of the cylinder body being separated from each other. This also applies to at least a part of each.

The position of the second weight support 22 is
It corresponds to the four corner positions of the rectangular part (part of the apparatus main body B) in plan view centering on the vertical central axis of the cylindrical body holding part 14 in the apparatus main body B,
Of the vertical planes passing through the vertical center axis of the cylindrical body holding portion 14, four positions symmetrical to those parallel to the long side or the short side of the apparatus main body B, and a pair symmetrical to the vertical center axis This also corresponds to a configuration in which two positions (two-fold rotationally symmetric positions) are configured.

  Since the first weight support portion 20 and the second weight support portion 22 are not obstructed above, the reaction force weight can be loaded from above and unloaded upward.

  The upper height positions of the first weight support portion 20 and the second weight support portion 22 are the same, and the axial length of the cylindrical body holding portion 14 (this example) is set at the upper height position of the cylindrical body holding portion 14. Is a height position to which a length equal to or less than half of the height of the lifting frame portion 12 is added.

  The reaction force weight is supported upward by the first weight support portion 20 and the second weight support portion 22, thereby allowing the vertical drive portion 18 to transmit the downward drive force to the target cylindrical body D among the vertical movable portion 18 a. The downward pressing force is loaded directly from the first weight support portion 20 and indirectly from the second weight support portion 22 via the lifting frame portion 12.

  (2-5) The apparatus main body B is provided with four level adjusting hydraulic cylinders 26 for making the vertical center axis of the cylindrical body holding portion 14 the vertical direction or other necessary directions. The upper and lower movable parts 18a are slightly inward along the long side.

  Also, work fences projecting upward (for example, a fence projecting about 1 m above the apparatus main body B), elevating ladders, and the like are attached to and detached from a plurality of locations on the outer periphery of the elevating frame section 12 of the apparatus main body B. For example, it has an attaching / detaching portion 28 such as a fence.

  (3) The reaction force weight can be supported upward above the apparatus main body B by the first weight support portion 20 and the second weight support portion 22 in order to take the reaction force of the cylindrical body D that is driven downward. The reaction force weight C2 for the second and subsequent stages can be used by laminating one layer or two or more layers on the reaction force weight C1 for the first stage, and the reaction force weight C1 for the first stage can be used. It can also be used in a single layer. The weights of the reaction force weight C1 for the first stage and the reaction force weight C2 for the second and subsequent stages are about 35 to 80% of the weight of the apparatus main body, respectively.

  The first-stage reaction force weight C1 has a thick plate shape in a rectangular shape in plan view that substantially corresponds to the shape in plan view of the apparatus main body B. The four corners of the reaction weight C1 for the first stage have a curved shape extending approximately 90 degrees centrally convex outward, and the upper and lower through-holes corresponding to the inner side of the cylindrical body holding portion 14 or larger in diameter at the center. A circular hole 50 is provided. Between the center part and the end part of the position along each long side of the reaction force weight C1 for the first stage, there are pin holes 52 penetrating vertically, and there are a total of four pin holes 52. Moreover, it has the latching protrusion 54 which protrudes to the side in the vicinity of the both ends of each long side, respectively.

  Further, on the outer sides of the four corners of the first-stage reaction force weight C1, a downward curve curved outwardly over a central angle of approximately 90 degrees, which can be fitted on the outer peripheral side of the first weight support portion 20, respectively. A standing plate portion 56 is provided.

  The reaction weight C1 for the first stage can be loaded from above on the first weight support part 20 and the second weight support part 22 of the apparatus main body B, and the vertical direction of the cylindrical body holding part 14 with respect to the apparatus main body B It is loaded downward in a well-balanced manner around the center axis. The four curved upright plate portions 56 of the first-stage reaction force weight C1 in the state of being appropriately supported by the first weight support portion 20 and the second weight support portion 22 are the upper ends of the four vertical direction driving bodies 18, respectively. It is possible to prevent the first weight support portion 20 from being fitted on the outer periphery of the first weight support portion 20 and displaced from the apparatus main body B to the side.

  The reaction force weight C2 for the second and subsequent stages is the same as the reaction force weight C1 for the first stage except that it does not have the curved upright plate portion 56, and is perpendicular to the apparatus body B in the vertical direction of the cylindrical body holding portion 14. It is loaded downward with a good balance around the central axis. In the state of being appropriately stacked on the reaction force weight C2 for the second and subsequent stages appropriately stacked on the reaction force weight C1 for the first stage or on the reaction force weight C1 for the first stage, By allowing the pin to penetrate through all the layers in the pin hole 52, the reaction force weight C2 for the second and subsequent stages shifts laterally with respect to the reaction force weight C1 for the first stage and the reaction force for the second and subsequent stages. It is possible to prevent the weights C2 from shifting to the side.

  The upper surface of the first-stage reaction force weight C1 supported upward by the first weight support portion 20 and the second weight support portion 22, or the reaction force weight C1 for the first step or the reaction force weight for the first step. The operator works on the upper surface of the reaction force weight C2 for the second and subsequent stages stacked on C1 or the upper surface of the reaction force weight C2 for the second and subsequent stages stacked on the upper surface thereof. It can be used as a work surface for In that case, if necessary, a fence, an elevator ladder or the like as described above can be attached to the attaching / detaching portion 28 or the like of the fence.

  [2] Embodiments of the present invention will be further described, including forms other than those described above.

  (1) An all-round rotation device of the present invention has a device body and a reaction force weight, and performs, for example, a cylindrical body by rotating around the central axis and driving downward into the ground. For excavating or cutting the ground, rock, underground structure or the like with a bit provided at the tip of the cylinder, or press-fitting a cylindrical body into the ground or the like.

  (2) Main unit

  The apparatus main body includes a cylindrical body holding section, a rotation driving section, and a vertical driving body, and has a weight support section. The apparatus main body preferably has a vertically penetrating space through which the target cylindrical body can vertically pass through the inside of the cylindrical body holding portion in a central portion in plan view, and the cylindrical body is held in the vertically penetrating space. It is held vertically by the unit, and a function of rotating the cylinder around the central axis by the rotation driving unit and driving downward to the ground by the vertical driving unit is realized.

  As a cylindrical body (casing), for example, excavating or cutting the ground, bedrock, underground structure, etc. with a bit provided at the tip, or being pressed into the ground while performing such excavation, if necessary Examples include, but are not limited to, those in which a cylindrical body is drawn after concrete is cast and piles are formed after reinforcing bars are arranged inside.

  (2-1) Cylindrical holder

  The cylindrical body holding unit holds the target cylindrical body vertically. For example, the cylindrical body has an outer peripheral portion that is rotationally symmetric with respect to a plurality of circumferential positions (for example, the central axis of the rotating body). The cylindrical body can be held by pressing or tightening in the radial direction by a hydraulic cylinder or the like at two or three or more locations) or 70 to 90% or more of the circumferential direction or over the entire circumference.

  For example, the cylindrical body holding portion may be supported by the apparatus main body so as to be able to rotate around the vertical rotation axis while the cylindrical body is fixedly held. In addition, the cylindrical body holding portion includes a plurality of rolling elements (for example, various bearing-type rolling elements) that roll while holding the cylindrical body vertically at a position fixed to the apparatus main body. It is also possible for the body to be rotatable about a vertical central axis.

  (2-2) Rotation drive unit

  The rotation drive unit rotates the cylinder held by the cylinder holding unit around the central axis in the vertical direction. For example, the rotation holding unit holds the cylinder holding unit in a state where the cylinder is fixedly held. The cylindrical body can be driven to rotate around the vertical central axis by rotating it around the vertical central axis. Further, the rotation drive unit, for example, rotates the cylindrical body vertically by rotating a part or all of a plurality of rolling elements that roll while holding the cylindrical body in a fixed position with respect to the apparatus main body. It can be driven around.

  As a power source for the rotation drive unit, for example, a hydraulic motor, an electric motor, or the like can be appropriately used together with a necessary reduction gear.

  (2-3) Vertical driving body

  The vertical driving body is for driving the cylindrical body held by the cylindrical body holding portion downward into the ground or the like via the cylindrical body holding portion, and is lowered to the target cylindrical body via the cylindrical body holding portion. It has a vertically movable part that transmits driving force. Note that the cylinder body may be capable of being driven upward. The vertical driving body can drive downward or upward with respect to the cylindrical body held by the cylindrical body holding part by moving the vertical movable part up and down. After driving the cylindrical body downward or upward for a predetermined length, if necessary, release the holding of the cylindrical body by the cylindrical body holding part and move the vertical movable part upward or downward to hold the cylindrical body again by the cylindrical body holding part. In addition, by moving the vertical movable part downward or upward, the cylindrical body can be further driven downward or upward via the cylindrical body holding part.

  When the apparatus main body has a base frame part, the lower part or other part of the vertical driving body may be coupled to the base frame part, for example.

  The vertical direction driving body has a plurality of positions radially outward of the cylindrical body holding portion (for example, positions of 2n [n is an integer of 2 or more] symmetric with respect to a vertical plane passing through the vertical central axis of the cylindrical body holding portion. A pair of symmetrical positions (two-fold rotational symmetry positions) with respect to the vertical center axis, and three or more rotational symmetry positions around the vertical center axis of the cylindrical body holding portion) However, the present invention is not limited to this.

  As a more specific example having the vertical driving body at four positions, four corners of a rectangular shape (rectangular shape or square shape) in a planar view centering on the vertical central axis of the cylindrical body holding portion in the apparatus main body. There may be mentioned a case where each position has a vertical driving body.

  As the vertical direction driving body, one utilizing a hydraulic cylinder can be exemplified.

  (2-4) Weight support part

  (2-4-1) The weight support is located at the upper part of the device body, and the reaction force weight for taking the reaction force of the cylindrical drive downward is the upper part of the device body (the non-rotating part of the device body). Can be supported upward.

  The weight support portion preferably supports the reaction force weight upward on a horizontal surface, but is not limited thereto.

  (2-4-2) The weight support portion has a structure in which a reaction force weight can be loaded from above and unloaded upward. Such a weight support portion can support the reaction force weight, for example, above the apparatus main body including the cylindrical body holding portion, and there is no obstacle above.

  (2-4-3) The upper height position of the weight support portion is, for example, the axial height of the cylindrical body holding portion at the upper height position of the cylindrical body holding portion (for example, the cylindrical body holding portion is cylindrical It is assumed that the position is equal to or lower than the height position to which the axial length of the portion that presses the outer peripheral portion of the body is added.

  (2-4-4) The reaction force weight is directed upward at the weight support part, and directly or indirectly downward with respect to the vertically movable part that transmits the downward driving force to the target cylindrical body among the vertical direction drive bodies. It is intended to load a pressing force.

  As an example of directly applying downward pressing force to the vertically movable part, the upper end part of the vertically movable part of the vertical driving body (generally, the upper end part of the vertical direction driving body) supports the reaction weight upward. The case where it is a weight support part to perform can be mentioned.

  In addition, as an example of indirectly loading a downward pressing force on the vertically movable part, a part of the apparatus main body that supports the cylindrical body holding part and is connected to the vertically movable part (for example, a lifting frame that can be lifted and lowered by a vertical driving body) And the like, and the reaction force weight is supported upward by the weight support portion, so that a downward pressing force is loaded on the vertically movable portion.

  (2-4-5) The position of the weight support part is a plurality of positions radially outward of the cylindrical body holding part (for example, 2n [n is symmetric with respect to a vertical plane passing through the vertical central axis of the cylindrical body holding part An integer greater than or equal to 2] and a pair of positions (two-fold rotationally symmetric positions) that are symmetrical with respect to the central axis in the vertical direction and are configured in n pairs, centered on the vertical central axis of the cylindrical body holding portion 3) or more rotationally symmetric positions), but is not limited thereto.

  As a more specific example of having the weight support portions at four positions, four corner positions of a rectangular portion (rectangular shape or square shape) in a plan view centering on the central axis in the vertical direction of the cylindrical body holding portion in the apparatus main body The case where each has a weight support portion such as the upper end portion of the vertically movable portion of the vertical direction driving body can be mentioned.

  In addition, the cylindrical body having the maximum diameter that can be held vertically by the cylindrical body holding portion is connected to the pair of parallel regions out of the two regions outside the pair of parallel vertical surfaces that circumscribe the diameter of the cylindrical body. At least a portion of the weight support portion is positioned in each of the four regions positioned outside the pair of parallel vertical surfaces that are orthogonal to the vertical plane and circumscribe the cylindrical body having the maximum diameter with the diameter of the cylindrical body being separated. It can also be done.

  (2-5) The apparatus main body is preferably provided with a plurality of level adjusting parts (for example, level adjusting hydraulic cylinders) for making the vertical center axis of the cylindrical body holding part the vertical direction or other necessary directions. It can have.

  Further, a work fence protruding upward (for example, a fence with a height of about 1 to 2 m above the apparatus main body), an elevating ladder, or the like can be detachably provided on the upper outer peripheral portion or the like of the apparatus main body.

  (3) Reaction force weight

  The reaction force weight can be supported upward at the upper portion of the apparatus main body by the weight support portion in order to take the reaction force of the cylindrical body driven downward.

  It is desirable that the reaction force weight be loaded downward with good balance (for example, good balance in the front-rear direction and the left-right direction) with respect to the apparatus main body about the central axis in the vertical direction of the cylindrical body holding portion. Such a reaction force weight, for example, opens a cylindrical body insertion portion corresponding to the cylindrical body holding portion, or is used alone, or opens a cylindrical body insertion portion corresponding to the cylindrical body holding portion, A single layer or a plurality of stacked layers may be used. However, for the reaction force weight, for example, a plurality of weights that are not stacked on each other are used as a set, or a plurality of weights that are not stacked on each other are used as a single layer or a plurality of sets are stacked. It can also be.

  Weight of reaction weight (weight of a single use, weight of a set of a plurality of weights that are not stacked on each other, weight of a single layer of a single layer or multiple layers, Alternatively, a set of weights that constitute a single layer of a plurality of weights that are not stacked on each other and used as a single layer or a stack of a plurality of sets) is, for example, 20% or more of the weight of the apparatus body, preferably It can be 40% or more or 50% or more, and can be, for example, 200% or less, preferably 150% or less, or 120% or less of the weight of the apparatus main body.

  More specifically, the reaction force weight can be a thick plate, for example, but is not limited thereto.

  Further, the plan view outline of such a thick plate-like reaction force weight can be substantially along the plan view outline of the apparatus main body, but is not limited thereto.

  The reaction force weight and / or the apparatus main body has the reaction force weight supported upward (generally mounted upward) at a predetermined position on the upper part of the apparatus main body by the weight support portion, and the apparatus from the predetermined position. A misalignment prevention unit that prevents the main body from shifting to the side can be provided.

  As a specific example of such a deviation prevention portion, there are provided pin holes penetrating vertically at a plurality of corresponding positions in each of the reaction force weight and the apparatus main body, and each position in a state where the reaction force weight is supported by the weight support portion. The side force can be prevented by making the pin penetrate the reaction force weight and the pin hole of the apparatus main body. As another example, when the outer shape of the reaction force weight is a planar view shape or other convex polygonal shape, and a plurality of corners thereof are supported on the weight support portion, the weight support portion of the reaction force weight On the lower side of the corners supported on the upper side, respectively provided with an outwardly convex downward curved standing plate part or a bent standing plate part that can be externally fitted to the outer peripheral side of the weight support part, or as a slip prevention part, or Each portion of the weight support portion that supports the corner portion of the reaction force weight is provided with an outwardly convex curved upright plate portion or a bent upright plate portion that can be fitted on the outer peripheral side of the reaction force weight as a misalignment prevention portion. Things can be mentioned.

  In the case where a plurality of reaction force weights are used in a stacked manner, the reaction force weights that are stacked may be provided with a shift prevention portion that prevents the reaction force weights from shifting sideways. As a specific example of such a misalignment prevention unit, upper and lower pin holes are provided at a plurality of corresponding positions in each of a plurality of stacked reaction force weights, and the reaction force weights are stacked in a stacked state. An example of preventing the lateral displacement by setting the pin through the pin hole of the reaction weight is shown.

  Work for the operator to work on the upper side of each reaction weight weight or the uppermost layer of the reaction force weight used in a stacked manner or on the upper side of the reaction force weight that is supported upward in the weight support portion Can be used as a zone. In that case, if necessary, a fence, a lifting ladder, or the like as described above can be attached to the upper outer peripheral portion or the like of the apparatus main body.

A Full-circle rotary excavator B Main body C1 Reaction force weight C2 for the first stage Reaction force weight D for the second and subsequent stages D Cylindrical body E Vertical space 10 Base frame part 12 Elevating frame part 14 Cylindrical body holding part 16 Rotation Drive unit 18 Vertical drive unit 18a Vertical movable unit 20 First weight support unit 22 Second weight support unit 24 Latching projection 26 Level adjusting hydraulic cylinder 28 Fence attaching / detaching unit 50 Vertical through hole 52 Pin hole 54 Latch Projection 56 Curved Standing Plate

Claims (6)

A cylindrical body holding unit for vertically holding a target cylindrical body, a rotation driving unit for rotationally driving the cylindrical body held by the cylindrical body holding unit around a central axis, and the cylindrical body holding unit a reaction force weights made all around rotating device for taking a device body with a vertical driver, the reaction force of the lower driving said cylindrical body of the held cylinder for downward driving into the ground or the like Because
The apparatus main body includes a weight support portion that supports the reaction force weight upward at an upper position thereof, and the reaction force weight can be loaded from above and unloaded upward from the weight support portion. Yes,
The reaction force weight can be supported upward at the upper part of the apparatus main body by the weight support part,
The vertical direction driving body has a vertically movable portion that transmits a downward driving force to the cylindrical body via the cylindrical body holding portion, and the reaction force weight is supported upward by the weight support portion, An all-around rotating device, wherein a downward pressing force is loaded directly or indirectly on the vertically movable portion.   The height position on the upper side of the weight support portion is a position equal to or lower than a height position obtained by adding the axial length of the cylindrical body holding portion to the height position on the upper side of the cylindrical body holding portion. All-around rotating device.   The all-around rotating device according to claim 1 or 2, wherein an upper end portion of the vertical movable portion of the vertical driving body is a weight support portion that supports the reaction weight upward.   The pair of parallel vertical surfaces out of the two regions outside the pair of parallel vertical surfaces circumscribing the diameter of the cylindrical body on the cylindrical body having the maximum diameter that can be held vertically by the cylindrical body holding portion. At least a portion of the weight support portion is located in each of four regions located outside the pair of parallel vertical surfaces that are orthogonal to the outer diameter and circumscribe the cylindrical body with the diameter of the cylindrical body separated from each other. The all-around rotating device according to any one of claims 1 to 3.   The reaction force weight and / or the apparatus main body is shifted from a predetermined position to the side of the apparatus main body while the reaction force weight is supported upward at a predetermined position on the upper part of the apparatus main body by the weight support portion. The all-around rotating device according to any one of claims 1 to 4, further comprising a misalignment preventing unit for preventing the misalignment.   The reaction force weight opens a cylindrical body insertion portion corresponding to the cylindrical body holding portion and is used as a single unit, or opens a cylindrical body insertion portion corresponding to the cylindrical body holding portion, and is a single layer or The all-around rotating device according to any one of claims 1 to 5, wherein a plurality of the rotating devices are used.

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