JP6124291B2 - Ground construction machine - Google Patents

Description

  The present invention is a construction machine that is used when a rod-like member such as a casing is inserted into or pulled out from the ground, and in particular, a lifting device that is forcibly moved along a leader and a rod-like member that is moved integrally therewith The present invention relates to a ground construction machine equipped with an attachment.

  This type of construction machine has a leader provided with a pin rack or rack and a sprocket or pinion that is slidably fitted to the leader side and meshes with the pin rack or rack. The lifting and lowering device that moves in a moving manner and an attachment that moves integrally with the lifting and lowering device, and a rod-like member such as a casing is connected to the attachment, and is inserted into or extracted from the ground by the vertical movement of the lifting and lowering device. As a specific example, the structure of Patent Document 1 is an example in which a pinion on the lifting device side is engaged with a rack on the leader side. The structure of Patent Document 2 is an example in which a lifter-side sprocket (referred to as a pinion in the description) is engaged with a leader-side pin rack.

JP-A-6-200520 (FIGS. 1 and 3) JP 2008-190286 A (FIGS. 5 to 9)

  In the construction machine described above, the relationship between the lifting device and the leader is such that a plurality of guide gibbles provided on the lifting device are slidably fitted to a guide member on the leader side, and the lifting device is in the fitted state in the sprocket. Alternatively, it is moved up and down along the leader together with an attachment by the drive of the pinion and a rod-like member such as a casing connected to the attachment.

  By the way, a rod-like member such as a casing may hit an obstacle in the ground in the process of penetrating to the predetermined depth of the ground, and in such a case, an excessive destructive force is applied to the guide give and deforms or destroys the guide give. There is also a possibility that the guide giver may come off the guide member on the leader side and the lifting device may fall over while rotating together with the attachment. Conventional measures include increasing the rigidity and number of guide gibs, and further devising fitting shapes and the like that are more difficult to disengage from the guide members. Even if they can improve safety, they are not a fundamental solution.

  In view of the above, the object of the present invention is to fundamentally make the elevating device and the entire attachment more reliably infallible even if the guide give of the elevating device is detached from the guide member on the leader side due to an external factor. It is to provide an excellent structure as a countermeasure.

1 to 4, the pin rack 27 or the leader 2 provided with the rack is slidably fitted to the leader side and meshed with the pin rack or the rack. A lifting device 3 that has a sprocket 33 or a pinion and moves along the leader 2 by driving the sprocket or pinion, and an attachment 4 that moves integrally with the lifting device and connects a rod-like member such as a casing. In the ground construction work machine, when the lifting device 3 is detached from the leader side, it has a fall prevention means 7 for restraining the lifting device so that it cannot fall over, and the fall prevention means 7 is arranged on the leader 2 side. A main body 70 that is slidably fitted and is followed in conjunction with the lifting device 3, and a peripheral portion of the lifting device 3 that is fixed to the main body is connected to the main body. It is characterized in that it has a restraining member 75 for restraining during.

The invention according to claim 2, Te claim 1 smell, before Symbol body 70, the are connected by a hanging member 77 to the lifting device 3, the downward movement when the lifting device is lowered by its own weight, on the said lifting device It is the structure which raises via the said suspension member at the time of a movement.

On the other hand, as shown in FIGS. 5 and 6, the invention of claim 3 , the pin rack 27 or the leader 2 provided with the rack, the slidably fitted to the leader side, and the pin rack or rack An elevating device 3 having a meshing sprocket 33 or pinion, which moves along the leader 2 by driving the sprocket or pinion, and an attachment 4 that is moved integrally with the elevating device and connects a rod-like member such as a casing. in with the ground construction for construction machines, have a drop-off preventing means 7 for tipping incapable restrain the lifting device when the lifting device 3 deviates from the reader side, the drop-off preventing means 8, before Symbol reader 2 A rope 18 that is detoured at the top of the elevator and suspends the lifting device 3, and the rope 18 is wound up in conjunction with the vertical movement of the lifting device 3. With rewinding, it is configured to automatically stopped when receiving a load exceeding a set value and a winch 19 for restraining the lifting device in position.

In each of the first and third aspects of the present invention, as a construction machine for ground construction provided with an elevating device and an attachment that move along the leader by driving a sprocket or a pinion, even if the elevating device is detached from the leader side due to an external factor, it falls off The lifting and lowering device is restrained so as not to fall by the preventing means, and as a result, the lifting device and the attachment integrated on the lower side thereof can be reliably prevented from falling. Therefore, the construction machine for ground construction according to the present invention is provided with a dedicated drop-off prevention means as compared with the conventional safety measures, so that it becomes a fundamental measure and reliability is also obtained.

Further, in the first aspect of the invention, the drop-off prevention means is slidably fitted to the leader side as illustrated in FIG. Since it consists of a restraining member which restrains a surrounding part inside, it can carry out easily, restraining expense with few members. Further, in the invention of claim 2, since the body of the drop-off preventing means during downward movement of the lifting device is lowered by its own weight, the upward movement when the lifting device is raised via the hanging member, dropout prevention according to claim 1 It is possible to simply and rationally implement the means to follow the means in conjunction with the lifting device.

Further, in the invention of claim 3, as shown in FIG. 5 and FIG. 6, the fall prevention means is bypassed at the top of the leader to suspend the lifting device and the rope unwinding / winding winch, that is, generally used conventionally. Since the drive lifting device is only equipped with a structure that lifts and lowers the attached attachment with a winch, it can be easily implemented at low cost. Here, as a specific embodiment, wherein the manner of adding only the captive unit of claim 3, together with the de-drop preventing means for reinforcing clogging claim 1 or 2 captive unit according to claim 1 or 2 It is conceivable that the configuration of item 3 is also added.

It is a schematic diagram which shows the whole structure of the construction machine for ground construction of a 1st form. It is the elements on larger scale which expanded the principal part of FIG. (A) is a figure which shows in the state which removed the raising / lowering apparatus and attachment of FIG. 2 from the reader, (b) is a figure which shows (a) in the state seen from the right direction. (A) And (b) is the side view and top view which show the relationship between the said leader and drop-off prevention means. It is a schematic diagram which shows the whole structure of the construction machine for ground construction of a 2nd form. It is the elements on larger scale which expanded the principal part of FIG.

  Embodiments to which the present invention is applied will be described below with reference to the drawings. In this description, the structure of the first embodiment shown in FIGS. 1 to 4 and the structure of the second embodiment shown in FIGS. 5 and 6 will be described in detail in this order. Note that the drawings schematically show the details omitted.

(Structure of the 1st form) The construction machine for ground construction of FIGS. 1-4 is a self-propelled base machine 1, the support leader 2 standing upright at the front end side of the base machine 1, and a leader When the liftable device 3 that is slidably fitted to 2 and moves up and down along the leader 2, the attachment 4 that moves integrally with the lift device 3, and the lifter 3 is detached from the leader 2 side. Is provided with a drop-off preventing means 7 for restraining the lifting device 3 and the attachment 4 so as not to fall down, and the casing 6 is pivotally connected to the attachment 4 so as to be pivotally connected to and supported by the vertical movement of the lifting device 3. It is burned.

  Here, in the base machine 1, the upper main body 11 is supported by the lower traveling body having the caterpillar 10 so as to be able to turn through a turning portion. The upper main body 11 is provided with a cockpit and leader hoisting wire (not shown), a winch thereof, a support portion 12 protruding from the front left and right intermediate portions, and the like, and a stage 13 coupled to the rear portion and extending rearward. Etc. The stage 13 is equipped with a motor 14, an electric mount 15, and the like.

  The leader 2 is pivotally supported on the support portion 12 by a coupling pin (not shown). The leader 2 is an example of a round post, and a required number of leader forming portions are connected via a coupling means to have a length corresponding to the purpose. As shown in FIG. 4, the leader 2 is provided with a pipe or rod-shaped guide member that is provided on the front side (right side of the figure) of the cylinder body 20 with a metal fitting 24 and extends in the vertical direction on both sides. 25, 25, a pair of vertical walls 26 arranged in parallel between the guide members 25 and extending in the vertical direction, a pin rack 27 provided in a ladder shape between the vertical walls 26, and a lower side The anti-vibration means 28 is provided to suppress the swing of the casing 6. The pin rack 27 is composed of a number of pins arranged at equal intervals in a state where both ends 27a of the unit pins are engaged with the through holes of the vertical walls 26.

  As shown in FIGS. 2 and 3, the lifting device 3 is fixed to a substantially rectangular housing 30 and an end surface of the housing 30 on the leader 2 side, and defines a sprocket window or vertical groove (not shown). A pair of plate members 31, a plurality of guide gibs 32 fixed to the plate member 31 and projecting toward the leader side, and pivotally supported in the housing 30 so as to mesh with the pin rack 27, and a hydraulic motor (not shown) Are provided on the upper and lower portions of the casing 30 on the leader 2 side, and are slidably in contact with the corresponding guide members 25, and are provided on the lower portion of the casing 30. And a connecting portion 35 coupled to the upper portion of the attachment 4.

  The plate member 31 includes a first plate portion 31a that defines the window or vertical groove, and a second plate portion 31b that is formed by bending the first plate portion 31a at a substantially right angle. On the second plate portions 31b on both sides, three guides 32 are projected on one side and six on both sides so that the guide gibs 32 are fitted to the corresponding guide members 25, and the upper end of the suspension member 7 described later is provided with a bracket 78 and a bolt. Connected by B or the like. The guide gibs 32 on both sides are fitted to the corresponding guide members 25 in a state where the pair of guide members 25, 25 arranged side by side are sandwiched from both sides in the same manner as the guide gibs 72 constituting the drop prevention means 7 in FIG. Are combined.

  The attachment 4 includes a constraining cylinder portion 36 coupled to the housing-side coupling portion 35, a cylinder portion 4A, a cylinder portion 4B, and a cylinder portion having a rotation mechanism portion 5A interposed therebetween from the top to the bottom. 4C, 4D and the lowermost cylinder portion 4E interposing the swivel 5B between the cylinder member 4D are integrally connected.

  More specifically, the constraining cylinder portion 36 includes a circular flange portion 36a provided around the top and bottom as shown in FIG. 4A, and a semi-cylindrical positioning flange portion provided between the flange portions 36a. 37 and is connected to the connecting portion 35 by a connecting member 38 or the like. 4 A of cylinder parts have the holding base 40 which supports the hopper 39, a depth meter not shown, etc. in the circumference, and are connected integrally between the restraint cylinder part 36 and the cylinder part 4B. The cylinder portion 4B has a window portion that is opened and closed by the door 41, and is integrally connected between the cylinder portion 4A and the cylinder portion 4C.

  The rotation mechanism unit 5A rotates the casing 6 via a gear mechanism that is provided in the casing 43 and driven by a motor 45 or the like held on the casing. The cylinder portion 4 </ b> C is provided so as to protrude upward with respect to the housing 43, and the cylinder portion 4 </ b> D is provided so as to protrude downward with respect to the housing 43. Reference numeral 46 denotes a control or mechanism that enables driving of the motor 45 and the like. The cylindrical member 4E is connected to the cylindrical member 4D via a swivel 5B. The swivel 5 </ b> B is supported by a plurality of vertical arms 47 provided below the housing 43. The vertical arm 47 is provided with a horizontal arm 48 that supports a supply pipe (not shown) connected to the swivel 5. The casing 6 may have a cylindrical shape, a rod shape, or any other shape. The casing 6 is operatively connected to a gear mechanism in the housing 43 with the upper end inserted into the attachment 4, and is rotated by the driving force of the motor 45. The

  The casing 43 is provided with a work table plate 43a that is joined in a substantially horizontal state on both sides and the front side, and a plurality of guide gibs 42 that are joined in a substantially vertical state on the side facing the leader 2. Mounting plate portion 43b. Similar to the guide give 32, the guide give 42 is provided with two protrusions on one side and four on both sides so as to fit the corresponding guide member 25.

  The drop-off prevention means 7 is slidably fitted to the leader 2 side and followed in conjunction with the lifting device 3, and the restraining cylinder portion 36 of the lifting device 3 is fixed to the main body 70 with the main body 70. A restraining wire 75 serving as a restraining member that restrains the body 70 and a suspension wire 77 serving as a suspension member that suspends the main body 70 from the lifting device 3.

  That is, the main body 70 has a block shape longer than the interval between the guide members 25, and has two upper and lower grooves 70a provided on both side surfaces. The mounting plate 71 is formed to have a plate width or height larger than that of the main body 70. The main body 70 is joined to the mounting plate 71 by welding or the like at a substantially upper and lower intermediate portion of one surface, and the two guide gibbs 72 are joined to the other surface so as to fit the corresponding guide member 25. The main body 70 and the guide give 72 are provided with a concave escape groove 73 in the middle between the left and right sides. As shown in FIG. 4B, the escape groove 73 allows the pin rack 27 extending vertically to escape in a state in which each guide give 72 is slidably fitted to the corresponding guide member 25.

  The restraining wire 75 is a member that restrains and supports the restraint cylinder portion 36 of the attachment 4 between the body 70 in a state where both end portions 76 are fixed to the grooves 70 a on both sides of the body. Structurally, it is not limited to this wire configuration, and may be a U-shaped rigid frame, for example. For the attachment structure of the restraining wire 75, a configuration in which both end portions 76 are formed in a loop shape and fixed to the main body 70 by bolts and nuts (not shown), a configuration in which both end portions 76 are fixed to corresponding portions of the main body 70 by welding, etc. can be adopted. .

  Further, as shown in FIG. 4A, each restraining wire 75 is disposed in the restraining cylinder portion 36 so as to be wound between the upper flange portion 36a and the flange portion 37 and between the flange portions 37. Yes. That is, in this structure, the restraining wires 75 are guided so as not to be inadvertently overlapped due to the presence of the flange portion 37 or the like.

  2, the upper end side of the hanging wire 77 is connected to the above-described second plate portion 31b via the metal fitting 78 and the bolt B, and the lower end side is described above via the metal fitting 78 and the bolt B. The mounting plate 71 is connected. For this reason, the drop-off preventing means 7 is lifted in conjunction with the main body 70 so as to be lowered by its own weight when the lifting device 3 is moved downward, and pulled by the suspension wire 77 when the lifting device 3 is moved upward. become.

  The above construction machines are used in the same manner as in the past for ground construction. In this structure, in the process in which the casing 6 is lowered by the drive of the lifting device 3 and penetrates into the ground, an excessive destructive force is applied to the lifting device 3 and the like due to an obstacle in the ground, resulting in the above-mentioned If the guide gib 32 (and the guide gib 42) is deformed or broken, and further when the elevating device 3 tries to rotate together with the attachment 4 when it is detached from the leader side guide member 25, the elevating device 3 is restrained by the fall prevention means 7 so that it cannot fall over. That is, the restraining cylinder portion 36 of the lifting device is restrained so as to be received between the main body 70 and the restraining wire 77. Therefore, in this structure, it is possible to reliably prevent the falling including the lifting device 3 and the attachment 4 integrated therebelow, and as a result, reliability can be obtained as a fundamental safety measure.

(Second embodiment) The construction machine for ground construction shown in FIGS. 5 and 6 is changed from the first embodiment in that it includes a drop prevention means 8 together with a drop prevention means 7. For this reason, in this description, the same code | symbol is attached | subjected to the same or similar member as the said 1st form, and in order to avoid duplication description, only a changed part is explained in full detail.

The fall prevention means 8 of the second form includes a sheave block 9 provided on the upper wall of the casing 30 of the lifting device via a fixing bracket 90 and a swing arm 91, and a top sheave provided on the top of the leader 2. 22 and a winding winch 19 mounted on the upper body 11 of the base machine, and the rope 18 is pulled out from the winch 19 and passes through the pulleys 23 of the top sheep 22, and further, the pulley 23 and the sheep of the top sheave 22. A rope portion 18a spanned between the pulley 9a of the block 22 and the rope 18 is wound up and rewound in conjunction with the vertical movement of the lifting device 3 under the control of the winch 19, and the load exceeding the set value. When it receives, it is the structure which stops automatically and restrains the raising / lowering apparatus 3 to the position.

  That is, the winch 19 is controlled as follows in the above-described drop-off preventing means 8. First, in this structure, torque control is performed so that the winch 19 always applies a predetermined tension to the rope 18 to prevent the rope 18 from being bent. That is, when the lifting device 3 moves up, a tension torque for winding acts, and when it moves down, a tension torque for rewinding acts due to its own weight. As described above, the drop-off prevention means 8 causes the winch 19 when the guide gib 32 (and the guide gib 42) is deformed or broken, and further when the elevating device 3 is rotated with the attachment 4 by being detached from the leader side guide member 25. However, by detecting a sudden oil pressure and locking the brake, the lifting / lowering device 3 is restrained from being overturned in a suspended state. In this example, the above-described action of the drop-off prevention means 8 and the action of the drop-off prevention means 7 described above can be obtained simultaneously. However, in terms of structure, it is needless to say that only the dropout prevention means 8 may be used.

  In addition, the construction machine for ground construction of this invention should just be equipped with the structure specified by a claim, for example, the concrete structure of the raising / lowering apparatus 3, the attachment 4, the casing 6, etc. refer to the above description of the form. It can be changed or expanded according to the purpose.

1 ... Base machine (10 is caterpillar, 11 is upper body)
2 ... Leader (20 is a cylinder body, 24 is a metal fitting, 25 is a guide member)
3 ... Lifting device (30 is a housing, 33 is a sprocket, 32 is a guide give)
4 ... Attachment (4A-4E is part)
5A ... rotating mechanism 5B ... swivel 6 ... casing (bar-shaped member)
7 ... Falling prevention means (70 is a main body, 72 is a guide give, 75 is a wire)
8 ... Fallout prevention means (18 is a rope, 19 is a winch)
9 ... Sib block 77 ... Hanging wire (suspending member)

Claims (3)

A lift provided with a pin rack or rack and a sprocket or pinion that is slidably fitted to the leader side and meshes with the pin rack or rack, and moves up and down along the leader by driving the sprocket or pinion In the construction machine for ground construction provided with a device and an attachment that is moved integrally with the lifting device and connects a rod-like member such as a casing,
The lifting device have a drop-off preventing means for overturning incapable restrain the lifting device when deviated from the previous SL reader,
The drop-off preventing means is slidably fitted on the leader side and is followed in conjunction with the lifting device, and a peripheral portion of the lifting device is fixed between the lifting device and the body. A construction machine for ground construction comprising a restraining member for restraining . The body, the lifting device are connected by a hanging member, the downward movement when the lifting device is lowered by its own weight, according to claim 1 upward when the lifting device is raised through the hanging member Construction machine for ground construction. A lift provided with a pin rack or rack and a sprocket or pinion that is slidably fitted to the leader side and meshes with the pin rack or rack, and moves up and down along the leader by driving the sprocket or pinion In the construction machine for ground construction provided with a device and an attachment that is moved integrally with the lifting device and connects a rod-like member such as a casing,
The elevating device has a fall prevention means for restraining the elevating device so that it cannot fall when it is detached from the leader,
The drop-off preventing means is detoured at the top of the leader and suspends the lifting device, and winds and unwinds the rope in conjunction with the vertical movement of the lifting device and receives a load greater than a set value. automatic stop and ground construction for construction machine, characterized in that and a winch for restraining the lifting device in its position.

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