JP5906052B2 - Casing device - Google Patents

Description

  The present invention relates to a casing device. More specifically, the present invention relates to an improvement in the structure of a casing device for excavating the ground.

  Conventionally, as a casing device for excavating the ground without soil removal, there are those described in Patent Literature 1 and Patent Literature 2.

  A casing device (casing auger / sheath tube for gravel ground excavation) described in Patent Document 1 has a square shaft that has an excavation cone at the tip and is fitted with an upper lid and a lower lid that match a hollow pipe. It is inserted into the hollow tube, the upper lid and the hollow tube are detachably connected, and the ground is excavated by rotating and digging the square shaft.

  Moreover, the casing apparatus (casing tube with non-exhaust earth rotary press-fitting machine) described in Patent Document 2 is provided with a fixture inside the end of the casing tube, and the non-excavated excavator equipped with the excavation drill on the fixture is casing. It is provided detachably from above the tube.

  Further, these patent documents disclose a technique of excavating the ground without draining by closing the casing tip with a lid or an excavating device.

No. 8-9270 JP 2004-257220 A

  However, in the technique of Patent Document 1, since the square shaft is inserted into the hollow tube and then the square shaft is rotated and dug, the square shaft longer than the hollow tube length is required. At the time, a space more than double the length of the hollow tube was required in the sky, and there was a problem that construction could not be performed on the site where the sky was restricted. In addition, when adding a hollow tube, it is necessary to add a shaft, which increases the labor.

  Moreover, in the technique of patent document 2, the rotary pushing machine which constructs a casing tube, and the crane which hangs an excavation drill were needed, and there existed a subject in construction space and cost. Moreover, since the excavation drill is attached and detached from above with a wire, there is also a problem that it takes time and labor to remove the excavation drill from the casing tube once when the casing tube is added.

  The present invention solves the above-mentioned problems, and the object of the present invention is a casing device that excavates the ground without draining soil, and can be constructed in a minimum space even in a space with an upper limit. An object of the present invention is to provide a casing device that can be constructed by a base construction machine and can easily add a casing without removing a lid at the front end of the casing.

  The present invention, which has been conceived by the present inventor in order to solve such a problem, has a cylindrical main body part, a distal end opening and a proximal end opening formed at both ends of the main body part, A casing device including a casing to be excavated, further comprising a lid member that can be attached to and detached from the casing and closes the opening of the distal end portion, and is capable of excavating the ground with the lid member attached to the distal end portion. And by using the extraction member which can be engaged / disengaged with respect to a cover member, the said cover member can be extracted from a base-end opening through the inside of a casing, It is characterized by the above-mentioned.

  According to the present invention, the casing is rotationally press-fitted (press-fitting while rotating) or press-fitted (press-fitting without rotation) into the ground in a state where the lid member is attached to the opening of the tip (tip closed state). The casing can be buried up to a predetermined position by discharging the soil. Therefore, if the casing according to the present invention is used, the ground can be excavated without soil removal.

  Further, for example, in Patent Document 1 described above, the configuration is such that the ground is excavated by applying rotational torque to the square shaft, transmitting the rotational torque to the casing via the lid, and excavating the entire casing. If so, a square shaft having a length corresponding to that was required, which was the reason for requiring a space above the construction site. In this regard, according to the casing device according to the present invention, the entire casing can be embedded together with the lid member attached to the tip by rotating or press-fitting the casing itself. Such a long square shaft is not required, and can be accommodated if there is a space obtained by adding the lid member length and the casing length. Therefore, it is possible to perform construction in a minimum space, and it is possible to avoid a situation in which construction cannot be performed at a site where the sky is restricted. Further, according to the present invention, it is possible to avoid the trouble as in Patent Document 1 that the shaft needs to be added when the hollow tube is added.

  Further, in the casing device according to the present invention, the use of the extraction member that can be engaged with and disengaged from the lid member allows the lid member to be extracted from the casing base end opening at a stage after being embedded. That is, since it is not necessary to arrange a wire, a rod, or the like connected to the lid member inside the casing at the time of embedding, the casing can be easily added without removing the lid or adding the shaft.

  Further, in the casing device according to the present invention, the entire casing can be embedded together with the lid member attached to the tip by rotating or press-fitting the casing itself. There is no need for both a rotary pushing machine for constructing the tube and a crane for hanging the excavation drill, and the construction can be performed by only one construction machine.

  In the casing device as described above, it is preferable that the lid member has a structure that can be attached to the front end opening from the front end side of the casing. According to such a casing device, after covering the casing from above the lid member installed on the ground surface and attaching the lid member to the front end of the casing, the casing is rotationally press-fitted or press-fitted. It is possible to embed to a predetermined position with soil.

  Further, in this casing device, an attachment / detachment mechanism for detachably attaching the lid member to the attachment region is formed on the inner periphery of the attachment region where the lid member is attached to the casing and the outer periphery of the lid member. It is preferable. By using this attachment / detachment mechanism, the lid member can be attached / detached to / from the attachment region of the casing.

  Further, in this casing device, an inner diameter in at least an attachment region of the casing is smaller than an inner diameter in the main body, and an axial groove extending in the axial direction of the casing and a circumferential groove communicating with the axial groove are formed in the attachment region. In addition, it is preferable that protrusions that fit into the axial grooves and the circumferential grooves are formed on the outer periphery of the lid member, and that these grooves and protrusions constitute an attachment / detachment mechanism. According to this attachment / detachment mechanism, the lid member can be inserted from the front end of the casing and extracted upward from the opening of the base end, and further, the rotational force, pushing force, and pulling force applied to the casing by the circumferential groove. Can be transmitted to the lid member. Moreover, the lid member can be attached and detached at the front end of the casing by combining the operation of rotating the casing clockwise or counterclockwise with the operation of moving the casing up and down.

  Further, in the casing device, an axial groove extending in the axial direction of the casing and a circumferential groove communicating with the axial groove are formed on the outer periphery of the lid member, and the axial groove and the circumferential groove are formed on the inner peripheral surface of the casing. It is also preferable that protrusions that fit into the directional grooves are formed, and that these grooves and protrusions constitute an attachment / detachment mechanism. With such an attaching / detaching mechanism, it is possible to transmit the rotational force, pushing force, and pulling force applied to the casing to the lid member, and the operation of rotating the casing clockwise or counterclockwise and the operation of moving the casing up and down. By combining these, it is possible to attach and detach the lid member at the front end of the casing.

  Further, in the casing device according to the present invention, a locking portion capable of transmitting a pulling force or a pulling force and a rotating force by the pulling member is provided on the upper portion of the lid member. If the extraction member is engaged with the locking portion and the extraction member is operated to transmit the extraction force or the extraction force and the rotational force, the lid member can be extracted from the base end opening through the inside of the casing. it can.

  According to the present invention, it is a casing device for excavating the ground without draining soil, which can be constructed in a minimum space even in a space where the sky is restricted, can be constructed with one construction machine, and further, the tip of the casing It is possible to provide a casing device that can easily add a casing without removing the lid of the casing.

It is a figure which shows one Embodiment of the casing apparatus which concerns on this invention, (a) The figure of the state which isolate | separated the casing and the cover member, (b) The figure which shows the casing of the state to which the cover member was attached. It is the figure of the state which isolate | separated the casing apparatus provided with the attachment / detachment mechanism of another structure, (a) The casing and the lid member, (b) The figure of the casing in the state where the lid member was attached. It is a figure which shows the example of a shape of a cover member to (a)-(d). It is a figure which shows (a) wire hook and (b) rod with a cap as a specific example of an extraction member. It is a figure which shows an example of the work flow at the time of construction using a casing apparatus in order of (a)-(g). It is a figure which shows the cover member by which the some roller was attached to the outer peripheral surface.

  Hereinafter, the configuration of the present invention will be described in detail based on an example of an embodiment shown in the drawings.

  FIG. 1 shows an embodiment of a casing device 1 according to the present invention. The casing device 1 is a device including a casing 2, and further includes a lid member 3 that can be attached to and detached from the casing 2 in the present embodiment. In this embodiment, the lid member 3 can be extracted from the casing 2 by using the extraction member.

  The casing 2 has a cylindrical main body 2b, and a distal end opening 2a and a proximal end opening 2c formed at both ends of the main body 2b (see FIG. 1A and the like). The magnitude | size of the casing 2 may be more than the diameter of the steel pipe pile or concrete ready-made pile etc. which are constructed after the said casing 2 is embed | buried. In addition, the casing 2 can be provided with a digging claw 2e at the tip thereof or a spiral 2f on the outer periphery in order to improve digability (see FIG. 1 and the like).

  The lid member 3 is a member that closes the front end opening 2 a of the casing 2 and is detachable from the casing 2. In addition, in this specification, the blockage means that (1) the tip end opening 2a of the casing 2 is completely closed, and (2) the tip end opening 2a is not completely closed. This includes a state in which the intrusion of earth and sand into the casing 2 can be reduced as compared with the case without the lid member 3.

  In this embodiment, the lid member 3 is a member having a stepped cylindrical shape whose one end is closed (see FIG. 1 and the like). As long as 2a can be closed, the shape of the lid member 3 may be, for example, a plate shape or a cylindrical shape. In addition, the tip shape of the lid member 3 can be a conical shape as indicated by reference numeral 3a, for example, to improve excavation (see FIG. 1, etc., FIGS. 3A and 3B), and a spiral blade. A shape with 3b (see FIG. 3C), a shape with excavation blade 3c and claw 3d (see FIG. 3D), and the like can also be used.

  Further, in the present embodiment, the thickness portion 4 is made thicker than the thickness of the main body portion 2b so that the inner peripheral surface on the front end side of the casing 2 protrudes toward the inner peripheral side. An attachment region 2d for attaching the lid member 3 is formed on the inner peripheral side of the thick portion 4 (see FIG. 1 and the like). The inner diameter of the attachment region 2d formed by making a part of the casing 2 thick has a diameter that allows the lid member 3 to pass therethrough.

  Furthermore, in the present embodiment, an attachment / detachment mechanism (in FIG. 1 and the like) for attaching the lid member 3 to the attachment region 2d detachably to the attachment region 2d and the lid member 3 to which the lid member 3 is attached to the casing 2. (Denoted by reference numeral 20). By using such an attachment / detachment mechanism 20, the lid member 3 can be attached / detached to / from the attachment region 2 d of the casing 2.

  A specific example of the attachment / detachment mechanism 20 will be described (see FIG. 1). In the casing device 1 of the present embodiment, the thick portion 4 forming the attachment region 2d has a casing axial direction over the entire length of the thick portion 4 (in the direction of the central axis of the casing 2, and in the case of the present embodiment). Are extending in the longitudinal direction) and are formed with circumferential grooves 6 that intersect perpendicularly to the grooves 5a, 5b, 6 on the outer peripheral surface of the lid member 3. And a projection 7 to be fitted. After the protrusion 7 of the lid member 3 is inserted into the axial groove 5a from the front end side of the casing 2, the casing 2 is rotated relative to the lid member 3 (in the case of the casing device 1 shown in FIG. By rotating it clockwise) and fitting the protrusion 7 into the circumferential groove 6, the rotational force, pushing force and pulling force acting on the casing 2 can be transmitted to the lid member 3. Further, the casing 2 is rotated in the reverse direction relative to the lid member 3 (in the case of the casing device 1 shown in FIG. 1, the casing 2 is rotated counterclockwise), and the protrusion 7 is moved to a position directly below the axial groove 5b. By shifting, it is possible to pull the lid member 3 upward.

  Another specific example of the attachment / detachment mechanism 20 will be described (see FIG. 2). In the casing device 1 shown in FIG. 2, axial grooves 8 a and 8 b that coincide with the axial direction of the casing 2 and extend over the entire length of the lid member 3 on the outer circumferential surface of the lid member 3, and a circumference that intersects with the orthogonal direction. Directional grooves 9 are formed, and protrusions 10 that fit into these grooves 8 a, 8 b, 9 are formed on the inner peripheral surface of the casing 2. After the projection 10 of the casing 2 is inserted into the axial groove 8a of the lid member 3, the casing 2 is rotated relative to the lid member 3 (in the case of the casing device 1 shown in FIG. 2, the casing 2 is rotated clockwise. Rotating) and fitting the protrusion 10 into the circumferential groove 9 allows the rotational force, pushing force, and pulling force applied to the casing 2 to be transmitted to the lid member 3. Further, the casing 2 is rotated in the reverse direction relative to the lid member 3 (in the case of the casing device 1 shown in FIG. 2, the casing 2 is rotated counterclockwise), and the protrusion 10 is positioned immediately above the axial groove 8b. It is possible to pull the lid member 3 upward by shifting to the top.

  Then, the latching | locking part 11 of the cover member 3 is demonstrated (refer Fig.4 (a)). On the upper part of the lid member 3 of the present embodiment, a locking portion 11 capable of transmitting a pulling force by the pulling member is provided. The lid member 3 can be extracted from the base end opening 2c through the inside of the casing 2 by setting the extraction member to the locking portion 11 and operating the extraction member to transmit the extraction force. For example, a locking rod member provided at the upper end of the lid member 3 can be used as the locking portion 11, and the extraction member has a bowl-like shape that is caught by the locking portion 11. A wire hook 12 that enables the lid member 3 to be pulled up can be used (see FIG. 4A). Although not particularly illustrated, it is also preferable to provide a mortar-shaped recess on the upper surface of the lid member 3 so that the wire hook 12 can be guided to just below the locking portion 11.

  Another specific example of the locking portion 11 and the extraction member will be described (see FIG. 4B). In the casing device 1 shown in FIG. 4B, a steel pipe 13 having a smaller diameter than the lid member 3 is attached to the upper end of the lid member 3, and a protrusion 14 is provided on the outer peripheral surface of the steel pipe 13, thereby pulling out force. And the latching | locking part which can transmit rotational force is comprised. With respect to such a lid member 3, an extraction member made of a rod 16 with a cap 15 attached is inserted from the base end opening 2 c of the casing 2, and the cap 15 is hung on the locking portion made of this protrusion 14, thereby The member 3 can be rotated and pulled upward through the inside of the casing 2 to be extracted from the casing 2.

  In addition, it is also preferable to attach the some roller 19 to the outer peripheral surface of the cover member 3 (refer FIG. 6). By attaching the roller 19, it is possible to prevent the lid member 3 from being caught in the casing 2 when the lid member 3 is pulled up, and to lift the lid member 3 more smoothly and easily.

  Next, an example of the work flow at the time of construction using the casing device 1 of the present embodiment will be shown (see FIGS. 5A to 5G).

(A) The lid member 3 is installed on the ground surface (see FIG. 5A). When installing the lid member 3 on the ground surface, the wire hook 12 can be used, or the rod 16 with the cap 15 can be used. In addition, it is preferable in that the lid member 3 is installed in advance at a position to be a pile core so that a subsequent pile core set is not necessary and the labor can be further reduced. Further, if a part of the tip of the lid member 3 is embedded in the ground surface, stable installation is possible.

(B) The casing 2 is sandwiched between construction machines and covered with the lid member 3, and the casing 2 is rotated and fitted with the lid member 3 (see FIG. 5B). When the casing 2 and the lid member 3 are fitted to each other, if there is a space in which the length of the lid member 3 (the height in the vertical direction) and the length of the casing 2 are added in the sky above the construction machine or the construction site. Well, it is possible to construct in a minimum space.

(C) While the casing 2 and the lid member 3 are fitted, rotational press-fitting is performed with no soil (see FIG. 5C). In addition, as a method for embedding the casing 2, in addition to rotational press-fitting, vibration press-fitting or the like can be performed.

(D) A casing 17 for addition is installed on the upper part of the casing 2 and connected (see FIG. 5D). As a connection method, welding, a mechanical joint, or the like can be employed. At this time, since there is no wire, rod or the like connected to the lid member 3 in the casing 2, there is no need to remove the lid member 3 or add the rod when adding the casing, and the additional casing 17. Can be easily added.

(E) After reaching the predetermined depth, the casings 2 and 17 are reversed to shift the position of the projection 7 of the lid member 3 in the circumferential direction (see FIG. 5E). If the excavating blade is provided in the lid member 3 in advance, it is preferable in that the excavating blade becomes a resistance when the casings 2 and 17 are reversed, and the casings 2 and 17 and the lid member 3 are relatively easy to rotate. is there. When the lid member 3 is extracted using the rod 16 with the cap 15, the lid member 3 can be reversely rotated by the rod 16 with the cap 15. Therefore, the casing 2 needs to be reversely rotated. Disappear.

(F) The wire hook 12 is inserted into the casings 2 and 17, the wire hook 12 is hung on the locking portion 11 of the lid member 3, and the lid member 3 is pulled upward through the inside of the casings 2 and 17 (FIG. 5 ( f)). The lid member 3 can be pulled up using the rod 16 with the cap 15 described above instead of the wire hook 12.

(G) A steel pipe pile 18 or a concrete-made pile is constructed on the excavated ground (see FIG. 5 (g)).

  As described above, according to the casing device 1 according to this embodiment, the casing 2 is rotationally press-fitted or press-fitted into the ground with the lid member 3 attached to the tip end opening 2a (tip closed state). Thus, the casing 2 can be embedded to a predetermined position.

  Moreover, according to the casing apparatus 1 which concerns on this embodiment, since the whole casing 2 can be embed | buried with the cover member 3 attached to the front-end | tip part opening 2a, it excavates, adding the shaft connected to the cover member 3. Unlike such a case, construction is possible if there is a space in which the length of the cover member and the casing length are generally added above the construction machine or construction site.

  Furthermore, according to the casing device 1 according to the present embodiment, the burying is completed by using an extraction member (for example, the wire hook 12 or the rod 16 with the cap 15) that is detachable from the lid member 3. Thus, the lid member 3 can be extracted from the base end opening 2 c of the casing 2. In the casing device 1 having such a configuration, when the casing 2 is buried, it is not necessary to arrange a wire, a rod, or the like connected to the lid member 3 inside the casing 2. It is possible to easily add the casing 2 without performing addition.

  Moreover, in the casing device 1 according to the present embodiment, the casing 2 itself can be embedded together with the lid member 3 attached to the tip by rotating or press-fitting the casing 2 itself. It is not necessary to use both the rotary push-in machine for constructing the casing tube and the crane for suspending the excavation drill as in the above, and it is possible to carry out a series of construction work by only one construction machine. .

  The above-described embodiment is an example of a preferred embodiment of the present invention, but is not limited thereto, and various modifications can be made without departing from the scope of the present invention. For example, in the above-described embodiment, the attachment region 2d is formed by thickening a part of the casing 2 near the distal end opening 2a, but the point is that the lid member 3 is extracted from the proximal end opening 2c through the inside of the casing 2. For this purpose, it is sufficient that the inner diameter of the attachment region 2d is formed so as to be equal to or smaller than the inner diameter of the main body 2b, and the attachment region 2d is only an example of a technique for that purpose. Absent. Therefore, as another example, for example, the casing 2 is thickened over the entire length in the axial direction, and the axial groove 5a extending in the casing axial direction over the entire length of the thick portion 4 is formed on the inner peripheral surface of the thick portion 4. , 5b can be formed. Further, when a part of the casing 2 is made thick, another cylindrical member is fitted in the vicinity of the distal end opening 2a of the cylindrical casing 2 having a uniform inner diameter, and is integrated with the casing 2 to be attached to the attachment region 2d. Can also be formed. Alternatively, a part of the outer periphery of the casing 2 can be tapered, and the attachment region 2d can be formed in the vicinity of the tip opening 2a.

  The present invention is suitable as a casing device for excavating the ground without soil removal.

DESCRIPTION OF SYMBOLS 1 Casing apparatus 2 Casing 2a Casing front-end | tip part opening 2b Casing main-body part 2c Casing base-end opening 2d Attachment area | region 3 Lid members 5a and 5b Axial direction groove | channel 6 attached to the casing 6 Circumferential direction groove | channel 7 attached to the casing Protrusions 8a and 8b attached to the lid member Axial grooves 9 attached to the lid member 10 Circumferential grooves attached to the lid member 10 Protrusions attached to the casing 11 Locking portion 12 Wire hook (extraction member)
14 Protrusion (locking part) attached to the steel pipe
16 Rod with cap (extraction member)
20 Detachment mechanism

Claims (5)

A casing device including a casing for excavating the ground, having a cylindrical main body, a distal end opening and a proximal end opening formed at both ends of the main body,
A lid that is attachable to and detachable from the casing and closes the opening at the tip, and has an outer peripheral surface whose length along the axial direction of the casing is shorter than the outer diameter, and can be placed on the ground surface Further having a member,
The ground can be excavated in a state in which the lid member is attached to the distal end, and the lid member is passed through the inside of the casing by using an extraction member that can be detached from the lid member. part Ri withdrawal possible der than the opening,
At the upper part of the lid member, there is provided an engaging portion that can be engaged with the extraction member inserted into the casing after the casing is buried and can transmit the extraction force or the extraction force and the rotational force by the extraction member. A casing device.   The casing device according to claim 1, wherein the lid member is a structure that can be attached to the opening of the tip from the tip side of the casing.   An attachment / detachment mechanism for detachably attaching the lid member to the attachment region is formed on an inner periphery of an attachment region to which the lid member is attached to the casing and an outer periphery of the lid member. The casing device described in 1.   An inner diameter of at least the mounting area of the casing is smaller than an inner diameter of the main body, and an axial groove extending in the axial direction of the casing and a circumferential groove communicating with the axial groove are formed in the mounting area, and the lid The casing device according to claim 3, wherein the outer periphery of the member is formed with the axial grooves and projections that fit into the circumferential grooves, and the attachment / detachment mechanism is configured by the grooves and the protrusions.   An axial groove extending in the axial direction of the casing and a circumferential groove communicating with the axial groove are formed on the outer periphery of the lid member, and the axial groove and the circumferential groove are formed on the inner peripheral surface of the casing. The casing device according to claim 3, wherein a projection to be fitted is formed, and the attachment / detachment mechanism is configured by the groove and the projection.

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