JP3844210B2 - Casing driver gripping device, its operating method and operating device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a casing gripping device, a method for operating the gripping device, and a device for operating in a casing driver used in an all casing method for civil engineering foundation work.
[0002]
[Prior art]
As a casing driver gripping device, Japanese Patent Publication No. 6-96848 provides an inclined surface whose upper side is enlarged on the inner peripheral surface of a rotating body supported by an elevating frame, and is inserted into the rotating body by a chuck cylinder. There is disclosed a structure in which a casing is gripped by a rotating body by press-fitting a wedge between the casing and the inclined surface.
[0003]
[Problems to be solved by the invention]
In the casing driver, the gripping device described in the above publication is configured to grip the casing against the rotating body while pressing the wedge against the outer periphery of the casing and pushing the wedge down, so when the casing is gripped, the casing tries to be pulled downward. Force acts. For this reason, the excavation bit at the tip of the casing is strongly pressed against the excavation ground at the time of gripping, and an excessive load is applied to the excavation bit, which causes damage to the excavation bit and an increase in rotational torque accompanying an increase in the amount of penetration of the excavation bit. .
[0005]
In view of the above problems, the present invention provides a casing driver gripping device, an operating method thereof, and an operating device capable of preventing an excessive load from being applied to the excavation bit at the tip of the casing when the casing is gripped by a rotating body with a wedge. The purpose is to provide.
[0006]
[Means for Solving the Problems]
A gripping device for a casing driver according to claim 1 includes a rotating body that allows the casing to pass therethrough, a rotating frame that supports the rotating body in a rotatable manner, and is lifted and lowered by the lifting device, and an inclined surface on the inner periphery of the rotating body. A wedge inserted between the casing and a vertical movement device of the wedge, and the wedge is press-fitted between the rotating body and the casing by lowering the wedge by the vertical movement device, and the casing is In a casing driver gripping device fixed to a rotating body,
A gripping pad is provided between the wedge and the casing so as to be movable in the vertical direction with respect to the wedge.
[0007]
In this way, by attaching the gripping pad so as to be movable up and down, when gripping the casing with the wedge lowered, the gripping pad is held in that position by friction with the casing after the gripping pad contacts the outer periphery of the casing. Then, the wedge slides down between the inclined surface of the rotating body and the gripping pad, and the gripping pad is firmly held between the wedge and the casing, and the casing is gripped by the rotating body. In this way, after the gripping pad is brought into pressure contact with the casing, the gripping pad is not lowered and the casing is not pushed down, so that it is possible to prevent the casing from being misaligned.
[0008]
The gripping device for a casing driver according to claim 2 is the method according to claim 1,
The grip pad has various sizes, and has a structure in which a grip pad corresponding to the size of the casing is attached to the wedge in a replaceable manner.
[0009]
In this way, if grip pads having various sizes corresponding to the size of the casing are provided, the grip pads can be selected and attached according to the size of the casing in the field, and various types of wedges can be used. Can accommodate a size casing.
[0010]
A gripping device for a casing driver according to a third aspect is the invention according to the first aspect,
The grip pad includes various sizes corresponding to casings of different sizes, and the grip pad is detachably attached to a sliding member attached to the wedge so as to be movable up and down.
[0011]
In this way, if grip pads of various sizes are prepared, it is possible to cope with casings of various sizes by selecting and attaching the grip pads according to the size of the casing in the field.
[0012]
A gripping device for a casing driver according to claim 4 is the method according to claim 1,
Various gripping pads of various sizes corresponding to casings of different sizes are detachably attached to the grip pads.
[0013]
Thus, if diameter conversion pads of various sizes are prepared, it is possible to cope with casings of various sizes by selecting and attaching the diameter conversion pads according to the size of the casing in the field.
[0014]
According to a fifth aspect of the present invention, there is provided a casing driver gripping device operating method comprising: a rotating body that penetrates a casing; a rotating frame that is rotatably supported by the rotating body; A wedge inserted between the inclined surface and the casing; and a vertically moving device for the wedge, and the wedge is pressed between the rotating body and the casing by lowering the wedge by the vertically moving device. In the operating method of the gripping device of the casing driver for fixing the casing to the rotating body,
In conjunction with the lowering operation of the wedge by the vertical movement device, the lifting device raises the lifting frame by the same amount as the lowering amount of the wedge so that the wedge is pressed against the casing without substantially moving up and down. The rotating body is gripped by the casing.
[0015]
In this way, by raising the lifting frame in conjunction with the lowering operation of the wedge so that the vertical movement of the wedge does not occur substantially, in the casing gripping operation, no pressing force acts on the casing, The casing can be prevented from being misaligned during the gripping operation of the casing. In addition, it is more preferable to raise the lifting frame only after the wedge is pressed against the casing.
[0016]
An operating device for a casing driver gripping device according to claim 6 comprises: a rotating body that penetrates the casing; a rotating frame that supports the rotating body in a rotatable manner; A wedge inserted between the inclined surface and the casing; and a vertically moving device for the wedge, and the wedge is pressed between the rotating body and the casing by lowering the wedge by the vertically moving device. In the operating device of the gripping device of the casing driver for fixing the casing to the rotating body,
When the operation switch of the vertical movement device and the operation switch are operated in the wedge lowering direction, the lifting device is driven to raise the rotating body in conjunction with the wedge lowering operation, thereby substantially lifting the wedge. And a controller that is pressed against the casing without being moved up and down and is gripped by the rotating body.
[0017]
By providing such a controller, the lifting frame can be lifted in conjunction with the lowering operation of the wedge so that the vertical movement of the wedge does not occur substantially. The pressing force does not act on the casing, and the casing can be prevented from being misaligned during the gripping operation of the casing.
[0018]
The operation device of the gripping device for the casing driver according to claim 7, according to claim 6,
The apparatus further includes a sensor for detecting the operation of the vertical movement device, and the controller performs an interlocking raising operation of the rotating body by the lifting device in conjunction with a lowering operation of the wedge only during operation by the vertical movement device. It is characterized by.
[0019]
In this manner, by allowing the lift frame to be lifted only when the vertical movement device is actuated, it is possible to prevent the lift frame from rising too much.
[0020]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 (A) is a plan view of a casing driver showing an embodiment of the present invention, and FIG. 1 (B) is a side view thereof. First, the outline of the casing driver will be described with reference to FIG. Reference numeral 1 denotes a base frame installed horizontally on the ground to be excavated or built by a casing. A plurality of guide posts 2 are erected on the base frame 1, and a cylindrical portion 3 a provided on an elevating frame 3 through which the casing 6 can be inserted is slidably fitted to the guide post 2. The elevating frame 3 can be moved up and down along the guide posts 2 by the expansion and contraction of the elevating cylinder 4 provided between the base frame 1 and the base frame 1.
[0021]
Reference numeral 5 denotes a rotating body through which the casing 6 can be inserted. The rotating body 5 is rotatably installed on the elevating frame 3 via a bearing 7. Reference numeral 8 denotes a rotating body drive motor installed on the elevating frame 3, and an output gear 9 thereof meshes with a ring-shaped external gear 5 b fixed to the lower portion of the rotating body 5 via an idler 10. Therefore, the rotating body 5 rotates by driving the drive motor 8.
[0022]
Reference numeral 11 denotes a vertically moving frame provided on the upper portion of the rotating body 5. The vertically moving frame 11 has a plurality of cylinders 11a, and the cylinders 11a are fitted to the guide posts 2 so as to freely move up and down. Reference numeral 12 denotes a gripping cylinder provided between the elevating frame 3 and the vertically moving frame 11. The vertically moving frame 11 is raised and lowered with respect to the elevating frame 3 by expansion and contraction thereof.
[0023]
A ring-shaped gripping frame 14 is rotatably mounted via a bearing 13 in an opening provided to penetrate the casing 6 of the vertical movement frame 11. An inner peripheral surface of the rotating body 5 has an inclined surface 5a whose upper diameter is enlarged, and a wedge 16 connected to the grip frame 14 via a link 15 is attached to the inclined surface 5a. Reference numeral 17 denotes a grip pad attached to the surface of the wedge 16 on the casing 6 side so as to be movable up and down. The vertical movement device 11 of the wedge 16 is constituted by the vertical movement frame 11, the gripping cylinder 12, the gripping frame 14, and the link 15.
[0024]
2 (A) and 2 (B) are a plan view and a side view showing the attachment structure of the grip pad 17 to the wedge 16, respectively. FIGS. 2 (C) and 2 (D) are a plan sectional view and a side sectional view, respectively. is there. As shown in these drawings, the wedge 16 and the gripping pad 17 are brought into contact with each other, and the surface of the wedge 16 on the casing 6 side is provided with a vertically long concave portion (or convex portion) 16a. The wedge 16 side surface is provided with a convex portion (or concave portion) 17a that is fitted to the concave portion (or convex portion) 16a so as to be movable up and down. It can be moved up and down.
[0025]
The contact surface 17b of the grip pad 17 with the casing 6 is a rough surface, or a member having a large friction coefficient is provided to increase the fixing force at the time of pressure contact with the casing 6. Further, the contact surface 17c of the grip pad 17 with the wedge 16 is a smooth surface or a member having a small friction coefficient is provided to facilitate the sliding of the wedge 16 with respect to the grip pad 17.
[0026]
On both sides of the wedge 16, there are provided stopper receivers 16b each having a concave or convex portion in the vertical direction, and a hook-like stopper 20 fixed by a fixing tool 19 such as a screw is fixed to the side surface of the gripping pad 17, The stopper 20 is engaged with the stopper receiver 16b so as to be slidable up and down to prevent the gripping pad 17 from being detached from the wedge 16.
[0027]
3A to 3C are views for explaining the gripping operation of the casing 6 by the wedge 16 and the gripping pad 17. 3A shows a state in which the casing 6 is not gripped by the rotating body 5 by the wedge 16. In this state, the gripping cylinder 12 is in an extended state, and the up and down moving frame 11 is relative to the lifting frame 3. FIG. At a high position (a). In this state, the grip pad 17 is at the lowest position with respect to the wedge 16 due to gravity, and the convex portion 17 a of the grip pad 17 is locked to the bottom surface of the concave portion 16 a of the wedge 16.
[0028]
When the gripping cylinder 12 is contracted from the state (a) in FIG. 3A, the gripping pad 17 comes into contact with the casing 6 as shown in FIG. 3B (the vertical motion frame 11 at this time). Position b). Here, since the frictional resistance between the gripping pad 17 and the casing 6 is set larger than that of the gripping pad 17 and the wedge 16, only the wedge 16 tilts the rotating body 5 while the gripping pad 17 is in contact with the casing 6. Further pressing is performed between the surface 5 a and the gripping pad 17, thereby pressing the gripping pad 17 against the casing 6. As a result, the casing 6 is gripped by the rotating body 5 by the wedge 16 and the grip pad 17.
[0029]
In this manner, the drive motor 8 is operated in a state where the casing 6 is gripped by the rotating body 5, and the casing 6 is built by contracting the elevating cylinder 4 while excavating the ground with the excavation bit at the lower end of the casing 6.
[0030]
As described above, since the grip pad 17 is attached to the wedge 16 so as to be movable up and down, after the grip pad 17 is pressed against the casing 6, the grip pad 17 does not substantially lower and the casing 6 is not pushed down. Therefore, breakage of the excavation bit can be prevented, and the cutter torque before and after gripping the casing can be stabilized.
[0031]
When the wedge 16 is lifted to release the casing 6, only the wedge 16 is lifted while the grip pad 17 remains in pressure contact with the casing 6 .
[0032]
FIGS. 4A to 4C are plan views of a wedge and a grip pad showing another embodiment of the present invention. In the present embodiment, the grip pads 17A to 17C having different thicknesses Ta to Tc in the radial direction of the casing 6 and radii of curvature Ra to Rc of the casing contact surfaces are used so as to correspond to those of various casings 6. It is prepared and what was selected from the holding pads 17A to 17C corresponding to the diameter of the casing 6 to be constructed at the site is attached by attaching / detaching the fastener 20 with the fixture 19.
[0033]
If comprised in this way, it can respond to the casing of various sizes with one kind of wedge 16. FIG.
[0034]
As another example of mounting the gripping pad 17 on the wedge 16, the wedge 16 and the gripping pad 17 are fitted to each other so as to be movable up and down, and a bracket projecting upward is provided on the upper surface of the wedge 16 and the gripping pad 17. The structure is such that a pin is connected to a pin hole provided in the bracket, and the pin hole of one bracket is a pin hole which is long in the vertical direction, and the grip pad 17 for the wedge 16 is set by the length of the long hole. You may comprise so that it can move vertically within the range. With such a structure, the grip pad 17 can be easily attached and detached from above the rotating body 5.
[0035]
FIG. 5A is a plan view showing another embodiment of the present invention, and FIG. 5B is a side sectional view thereof. In this embodiment, a sliding member 22 is attached to the wedge 16 so as to be slidable up and down, and a gripping pad 23 is detachably attached to the sliding member 22.
[0036]
FIGS. 6A and 6B are plan views showing the structures of the wedge 16, the sliding member 22 and the gripping pad 23 of FIG. 5 before and after the gripping pad 23 is attached, respectively, and FIG. FIG. 7 is a side view of FIG. The mounting structure of the sliding member 22 with respect to the wedge 16 is the same as the mounting structure of the grip pad 17 with respect to the wedge 16, and the convex portion 22a of the sliding member 22 is fitted to the concave portion 16a of the wedge 16 so as to be slidable up and down. The stoppers 20 attached to both side surfaces of the sliding member 22 by the fixing device 19 are locked to the recesses 16b on both side surfaces of the wedge 16 so as to be slidable in the vertical direction to prevent the stoppers 20 from coming off.
[0037]
The grip pad 23 has a structure to be fitted so as to cover the upper surface and both side surfaces of the sliding member 22, and the surface on the casing 6 side is formed in an arcuate surface 23 a along the outer peripheral surface of the casing 6. Two sets of brackets 24 and 25 to be fitted to each other are provided on the upper surface of the sliding member 22 and the upper surface of the gripping pad 23, the gripping pad 23 is placed on the sliding member 22, and the brackets 24 and 25 are fitted to each other to pin. By inserting the pin 26 into the holes 24a and 25a, the grip pad 23 is detachably attached to the sliding member 22.
[0038]
In the present embodiment, since the sliding member 22 is interposed between the wedge 16 and the gripping pad 23, the diameter d1 of the casing 6 when only the gripping pad 17 is used as shown in FIG. Compared to the above, it can be applied to the one having a small diameter d2.
[0039]
Further, as shown in FIG. 6B, the grip pad 23 has various curvature radii and thicknesses having contact surfaces as indicated by 23b and 23c in addition to the case where the casing contact surface 23a is indicated by a solid line. By preparing a thing and attaching the grip pad 23 having a size suitable for the casing 6 to be constructed on site, various casings can be accommodated.
[0040]
Moreover, if it is set as the structure which attaches to the holding | grip pad 17 the diameter conversion pad (not shown) of the various sizes corresponding to the casings from which size differs, it can respond to various casings.
[0041]
FIG. 7 is a partial side sectional view showing a configuration example of a casing driver to which the operating method of the gripping device according to the present invention is applied. 7 differs from that of each of the embodiments described above in that a lift cylinder 4 for moving the lift frame 3 up and down is built in the guide post 2 and that the grip pads 17 and 23 are not provided. is doing. The vertically moving frame 11 is provided with a cylindrical body 11a, and the cylindrical body 11a is slidably fitted to a cylindrical body 3a that is integral with the elevating frame 3.
[0042]
FIG. 8 is a block diagram showing an example of the configuration of an apparatus for carrying out the operating method of the gripping apparatus of the present invention. Reference numeral 27 denotes an operation switch for instructing the vertical movement and stop of the grip cylinder 12 for moving the vertical movement frame 12 up and down. 30 and 31 are hydraulic pumps for supplying hydraulic oil to the elevating cylinder 4 and the holding cylinder 12 for moving the vertical motion frame 11 up and down. 32 and 33 are electromagnetically operated control valves having solenoids 32a and 32b and 33a and 33b, respectively. , 34 is a variable throttle valve having a solenoid 34 a that adjusts the flow rate of hydraulic oil to the elevating cylinder 4, and 35 is an outer peripheral surface of the casing 6 when the gripping cylinder 12 is lowered to grip the casing 6. It is the pressure sensor of the hydraulic fluid provided as a means for detecting having been pressed against. A controller 29 receives the casing grip command signal from the operation switch 27 and a signal from the pressure sensor 35 and controls the control valves 32 and 33 and the variable throttle valve 34.
[0043]
FIG. 9 is a flowchart showing an embodiment of the operation method according to the present invention. The controller 29 monitors the operation of the operation switch 27 (step S1). When the operation switch 27 is operated in the direction of lowering the wedge 16, that is, the direction of gripping the casing, the solenoid 29a of the control valve 33 is energized and controlled. The valve 33 is switched to the upper position in FIG. 8 to start the contraction of the gripping cylinder 12 and lower the wedge 16 (step S2).
[0044]
Here, as shown in FIG. 10, when the angle of the wedge 16 is θ, the horizontal movement amount of the wedge 16 is x, and the vertical movement amount is y, the relationship between these movement amounts is expressed by the following equation.
y = x · tan θ
As can be seen from this equation, if the amount of horizontal movement required until the casing 6 is gripped by the wedge 16 is x, the wedge 16 also moves y in the vertical direction.
[0045]
Even if the wedge 16 moves as described above, the casing 6 is not pushed by the wedge 16 while the wedge 16 is not pressed against the casing 6, and there is no possibility that the casing 6 is misaligned, but the wedge 16 rotates. At the stage of being pushed with a high pressure between the inclined surface 5a of the body 5 and the casing 6, the casing 6 is pushed.
[0046]
Therefore, when the hydraulic pressure of the hydraulic fluid in the supply circuit to the gripping cylinder 12 reaches a predetermined value or more (step S3), the switch operation of the pressure sensor 35 itself or the comparison means of the reference pressure value and the detected pressure provided in the controller 29 is used. Then, the solenoid 32b of the control valve 32 is energized to extend the elevating cylinder 4 (step S4). In this case, the current value to the solenoid 34 a of the variable throttle valve 34 is adjusted so that the ascending speed of the elevating frame 3, that is, the rotating body 5 due to the extension of the elevating cylinder 4 is substantially matched with the speed of the wedge 16.
[0047]
Thereafter, the operation switch 27 is turned off or the presence or absence of a stop signal such as a timer or a grip cylinder 12 stroke end signal is checked (step S5). If there is this stop signal, both cylinders 4 and 12 are stopped (step S6). ).
[0048]
Thus, if the elevating frame 3 and the rotating body 5 are raised at the same speed in synchronization with the lowering of the wedge 16, the wedge 16 does not move in the vertical direction. For this reason, the casing is formed by pushing the casing 6. 6 misalignment can be prevented. Therefore, the vertical accuracy of the casing can be stabilized, the excavation bit can be prevented from being damaged due to misalignment, and the cutter torque before and after gripping the casing can be stabilized.
[0049]
Note that when the operation method of the present invention is carried out, there is no wedge press-in detection means such as the pressure sensor 35, and the lift frame 3 may be raised immediately when the operation switch 27 is operated in the downward direction. Good. However, until the wedge 16 is in a press-fit state in which the wedge 16 is strongly clamped between the rotating body 5 and the casing 6, the lifting frame 3 does not need to be lifted. 3 is preferably raised.
[0050]
In carrying out the present invention, when the wedge 16 is lifted and the casing 6 is released, the lifting frame 3 may be lowered in conjunction with the raising operation of the wedge 16 due to the contraction of the gripping cylinder 12. In this case, when operating in the lowering direction, the hydraulic pressure of the hydraulic oil when supplying the hydraulic oil to the gripping cylinder 12 is detected by the pressure sensor 35A (may be shared by the pressure sensor 35), and the wedge 16 is rotated. It is preferable to operate the elevating cylinder 4 so that the elevating frame 3 is lowered only until it is removed from between the casing 5 and the casing 6.
[0051]
FIG. 11 is a block diagram showing another embodiment of the apparatus for carrying out the operating method according to the present invention. A distance detecting device 36 for detecting whether or not the wedge 16 or the gripping cylinder 12, that is, the vertical movement device 18 is moving, is provided. The controller 29 is configured to operate the lift cylinder 3 only when the wedge 16 or the gripping cylinder 12 is moving.
[0052]
In this way, by raising / lowering the elevating frame 3 and the rotating body 5 only when the vertical movement device 18 is operated, the elevating frame 3 is excessively raised (or lowered). Can be suppressed.
[0053]
【The invention's effect】
According to the present invention, since the wedge lowering operation can be avoided when the casing is gripped , the excavation bit can be prevented from being damaged, and the cutter torque before and after the casing can be stabilized.
[Brief description of the drawings]
FIG. 1A is a plan view of a casing driver showing an embodiment of the present invention, and FIG. 1B is a side view thereof.
FIGS. 2A and 2B are a plan view and a side view, respectively, showing a structure for attaching a grip pad to a wedge in the present embodiment, and FIGS. 2C and 2D are a plan sectional view and a side sectional view, respectively. FIG.
FIGS. 3A to 3C are diagrams for explaining a gripping operation of a casing by a wedge and a gripping pad in the present embodiment.
FIGS. 4A to 4C are plan views of a wedge and a grip pad showing another embodiment of the present invention. FIGS.
FIGS. 5A and 5B are a plan view and a side sectional view, respectively, showing another embodiment of the present invention.
6A and 6B are plan views showing a state before and after the wedge and grip pad are joined, respectively, showing the embodiment of FIG. 5, and FIG. 6C is a side view of FIG. .
FIG. 7 is a side cross-sectional view showing an example of a gripping device that implements the operating method according to the present invention.
FIG. 8 is a configuration diagram showing an embodiment of an operating device of a gripping device that implements an operating method according to the present invention.
FIG. 9 is a flowchart showing an embodiment of an operation method according to the present invention.
FIG. 10 is a conceptual diagram of a casing gripping operation by a wedge.
FIG. 11 is a flowchart showing another embodiment of the operation method according to the present invention.
[Explanation of symbols]
1: base frame, 2: guide post, 3: lifting frame, 4: lifting cylinder, 5: rotating body, 5a: inclined surface, 5b: external gear, 6: casing, 7: bearing, 8: drive motor, 9 : Output gear, 10: idler, 11: vertical motion frame, 12: gripping cylinder, 13: bearing, 14: gripping frame, 15: link, 16: wedge, 17, 17A-17C: gripping pad, 18: vertical motion device , 19: fixing tool, 20: stopper, 22: sliding member, 23: gripping pad, 24, 25: bracket, 26: pin, 30, 31: hydraulic pump, 32, 33: control valve, 34: variable throttle Valve, 35, 35A: Pressure sensor

Claims (7)

A rotating body that penetrates the casing; a lifting frame that rotatably supports the rotating body and that is lifted by a lifting device; and a wedge that is inserted between the inclined surface of the inner periphery of the rotating body and the casing. A gripping device for a casing driver that includes a vertically moving device for the wedge, and presses the wedge between the rotating body and the casing by lowering the wedge by the vertically moving device to fix the casing to the rotating body. ,
A gripping device for a casing driver, wherein a gripping pad is provided between the wedge and the casing so as to be movable in the vertical direction with respect to the wedge. In the casing driver gripping device according to claim 1,
A gripping device for a casing driver, comprising gripping pads of various sizes and having a structure in which a gripping pad corresponding to the size of the casing is attached to the wedge in a replaceable manner. In the casing driver gripping device according to claim 1,
A casing driver having various sizes corresponding to casings of different sizes as the gripping pads, wherein the gripping pads are detachably attached to sliding members that are attached to the wedges so as to move up and down. Gripping device. In the casing driver gripping device according to claim 1,
A gripping device for a casing driver, wherein diameter changing pads of various sizes corresponding to casings of different sizes are detachably attached to the gripping pad. A rotating body that penetrates the casing; a lifting frame that rotatably supports the rotating body and that is lifted by a lifting device; and a wedge that is inserted between the inclined surface of the inner periphery of the rotating body and the casing. An apparatus for vertically moving the wedge, wherein the wedge is pressed between the rotating body and the casing by lowering the wedge by the vertically moving apparatus to fix the casing to the rotating body. In operation method,
In conjunction with the lowering operation of the wedge by the vertical movement device, the lifting device raises the lifting frame by the same amount as the lowering amount of the wedge so that the wedge is pressed against the casing without substantially moving up and down. A method for operating a gripping device for a casing driver, wherein the casing is gripped by a rotating body. A rotating body that penetrates the casing; a lifting frame that rotatably supports the rotating body and that is lifted by a lifting device; and a wedge that is inserted between the inclined surface of the inner periphery of the rotating body and the casing. An apparatus for vertically moving the wedge, wherein the wedge is pressed between the rotating body and the casing by lowering the wedge by the vertically moving apparatus to fix the casing to the rotating body. In the operating device,
When the operation switch of the vertical movement device and the operation switch are operated in the wedge lowering direction, the lifting device is driven to raise the rotating body in conjunction with the wedge lowering operation, thereby substantially lifting the wedge. A controller for a casing driver gripping device, comprising: a controller that is pressed against the casing without being moved vertically and gripped by a rotating body. In the operating device of the grip device of the casing driver according to claim 6,
The apparatus further includes a sensor for detecting the operation of the vertical movement device, and the controller performs an interlocking raising operation of the rotating body by the lifting device in conjunction with a lowering operation of the wedge only during operation by the vertical movement device. An operating device for a casing driver gripping device.

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