JP2007154543A - Check valve attaching device for surfacing prevention of of underground buried matter and fixture for taking out core - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a device for attaching a check valve to a peripheral wall of a manhole. <P>SOLUTION: The device has a core drill 25, a fixture 26 for taking out the core, and a valve-insertion fixture 27. A projection 265, which is projected high gradually toward the rear, is projected and formed at the center of the inside of the semicircular part 262 in cross section of the fixture 26 for taking out the core, and the part 262 is semicircular in cross section. Then the check valve is attached by making a cutting angle, which has the thickness equal to about 90 percent of the thickness of the peripheral wall of the manhole, in the peripheral wall 15 of the manhole with the core drill 25, then by switching to the fixture 26 for taking out the core and inserting the fixture 26 for taking out the core to an annular groove formed by a core bit 251. Because of the insertion, the projection ruptures the core from its roots, and the core is taken out by pulling out the fixture 26 for taking out the core. After the core has been pulled out, the check valve is inserted and attached to the hole, from which the core has been pulled out, by rupturing the bottom of the hole by the valve-insertion fixture 27. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention is attached to the peripheral wall of a buried object in order to prevent the buried object such as a manhole for a sewer or a common ditch from floating due to the liquefaction phenomenon of the ground at the time of an earthquake, and is always attached from the inside of the buried object to the outside of the buried object. The present invention relates to a device for installing a check valve that blocks the flow of water to the underground side and permits the flow of water from the underground side into the buried object when the soil pore water pressure on the underground side increases.

In the event of an earthquake, buried objects such as manholes may rise due to the liquefaction phenomenon of the ground, and when the manholes rise, the sewer pipes may not be able to take a gradient and the functions of the sewer pipes may be lost. As one of means for preventing a buried object such as a manhole from being lifted due to an earthquake or the like, Patent Document 1 below discloses that a water passage hole is formed in the peripheral wall of the manhole, and the water passage hole is connected to the manhole from the outside of the manhole. A technique is disclosed in which a check valve capable of passing water is provided, water in the ground around the manhole is taken into the manhole through a water hole, and the water content of the surrounding ground is lowered to prevent liquefaction.
JP-A-8-170349

  The above-described conventional technology cannot be applied to existing manholes and other buried objects, and earth and sand may flow into the buried objects from the outside, and there is still room for improvement in this respect. . Therefore, in Japanese Patent Application No. 2004-318818, a water passage hole is formed in the peripheral wall of an existing buried object such as a manhole, and water flow from the underground side outside the buried object to the buried object is allowed to the water passage hole. However, it is proposed to always install a check valve that blocks the flow of water from the inside of the buried object to the outside of the buried object. In Japanese Patent Application No. 2005-209798, the check valve is a peripheral wall of a buried object such as a manhole. As a method of attaching to the peripheral wall, a drilling operation is carried out using a core drill on the peripheral wall of the buried object, the drilling operation is temporarily interrupted in a state where most of the wall thickness of the peripheral wall is drilled, and it is surrounded by an annular groove formed by the drilling operation of the core drill. The process of removing the core from the root, and after removing the core, insert the core bit of the core drill into the hole from which the core has been removed, drill again, and cut until the core bit tip reaches the outer peripheral surface of the embedded peripheral wall. Go After that, a step of extracting the core bit and a check valve that shuts off the flow of water from one side to the other and flows water from the other side to the other side when the other water pressure exceeds a certain pressure is embedded in the core take-out hole. A method has been proposed which includes inserting a hole in a direction in which the flow of water from the inside of the object to the outside of the embedded object is blocked and pushing it in a strong manner, and piercing the peripheral wall part of the embedded object remaining in the core take-out hole. .

  An object of the present invention is to provide a core unloading jig used in the step of unfolding a core surrounded by an annular groove formed by drilling a core drill in the above method and an apparatus for carrying out the above method. And

  The invention according to claim 1 relates to a core take-out jig, and performs a drilling operation using a core drill on a peripheral wall of an embedded object, and after drilling a portion corresponding to most of the wall thickness of the peripheral wall, the drilling operation is temporarily interrupted. The core drill is inserted into an annular groove formed by the core bit on the embedded peripheral wall after the core bit of the core drill is pulled out, and at least a tip portion forms an annular shape and is surrounded by an annular groove inside. Protruding a locking portion for locking to the core, providing a protruding portion that gradually increases inward toward the rear of the locking portion, and pressing the core take-out jig strongly into the annular groove, the protruding portion When the core is pressed in the radial direction, the core is folded and broken from the base, and then the core removal jig is pulled out, the core held by the locking portion is extracted.

  The locking portions of the present invention may be provided only at one place, but are preferably provided at a plurality of places at appropriate intervals in the circumferential direction.

  The invention according to claim 2 is characterized in that the locking portion of the invention according to claim 1 is a claw piece projecting obliquely toward the rear.

  The invention according to claim 3 is characterized in that, in the invention according to claim 1 or 2, the rear part has a semicircular cross section, and the projecting part is formed at an intermediate part of the semicircular part of the cross section.

  The invention according to claim 4 is a slide pole, a fixing means for detachably fixing the slide pole to a position facing the embedded peripheral wall in a horizontal direction, a slide block slidably mounted on the slide pole, A feed mechanism that feeds the slide block along the slide pole and a base that is supported by the slide block so as to be able to turn around an axis perpendicular to the slide pole. The base is perforated on the peripheral wall of the manhole. The core according to any one of claims 1 to 3, wherein the core is broken and pulled out from the base by being pushed out and pulled out into an annular groove of a manhole peripheral wall formed by the core bit, and a core drill comprising a motor that rotationally drives the core bit. The removal jig and the hole formed after the core is extracted by the core removal jig Characterized in that the valve and pushing valve insertion jig is attached forms a radial from the axis.

  The fixing means for fixing the slide pole according to the present invention is to fix the slide pole in a state where it is stretched to the opposite part of the peripheral wall of the buried object. For example, it is screwed into the end of the pole and rotated in the forward or reverse direction using a tool. Examples thereof include a bolt that is screwed or loosened by a dynamic operation to change the amount of protrusion from the pole end, a jack attached to the pole end, and a hydraulic cylinder.

  As the feed mechanism, for example, a rack attached to the slide pole along the longitudinal direction of the slide pole, and a pinion rack formed of a pinion attached to the slide block and meshed with the rack and driven to rotate by a motor Examples thereof include a screw shaft that is attached to the mechanism and the slide block and is driven to rotate by a motor, and a nut that is attached to the slide block and is screwed onto the screw shaft.

  The turning of the base according to the present invention can be performed artificially, for example, by grasping a core take-out jig, but is preferably automatically performed by the power of a motor or the like.

  The check valve blocks the flow of water from one side to the other, and the flow of water from the other side to the other side is performed when the water pressure of the other side exceeds a certain level. But that doesn't matter. For example, the one proposed in Japanese Patent Application No. 2004-311818 can be mentioned. As an example of two of these, FIG. 1 is an example, and a case 1 comprising an inner cylinder 1a and an outer cylinder 1b, a filter 2 fixed to one end of the inner cylinder 1a, and a valve at the other end of the inner cylinder 1a. The check valve 3 includes a lid-like check valve 3 attached to the seat 1c. When a predetermined or higher water pressure is applied from the filter side, the check valve 3 is pushed out and opened.

  FIG. 2 shows another example, in which a check valve 4 attached to the valve seat 1c of the inner cylinder 1a and a filter 5 fixed to one end of the inner cylinder 1a are connected by a spring 6 so that a certain amount or more is obtained from the filter side. When water pressure is applied, the check valve 4 is pushed out and opened.

  The check valve described above may be detachably attached to the valve insertion jig, or may be fixed. In the former, the check valve is pushed into the hole in the peripheral wall of the manhole that is formed after the core is pulled out by attaching it to the valve insertion jig. In the latter, the check valve is artificially installed at the hole inlet, It can be pushed into the hole with an insertion jig.

  The invention according to claim 5 is the invention according to claim 4, wherein there is provided a reading means for reading the feed amount of the slide block sent by the feed mechanism, a turning means for turning the base, and a base turned by the turning means. A second fixing means for positioning and fixing the base when performing a fixed turn, a releasing means for releasing the fixing of the base by the second fixing means, a feed mechanism, a core bit driving motor by an input from the reading means, Control means for controlling the turning mechanism and release means of the base is provided.

  As a reading means in the present invention, for example, an encoder that reads the rotational speed of a motor or the like that is a driving source of a feed mechanism is given as a typical example. Arbitrary means can be used, and a motor can be used as a drive source of the means for rotating the base.

  As the second fixing means, for example, a pin which is attached to the slide block so as to be able to protrude and is always urged so as to protrude by a spring and fits into a hole opened in the base can be exemplified. For example, a solenoid, an air cylinder, or the like that pulls the pin against the action of a spring and detaches it from a hole formed in the base can be exemplified.

  According to the first aspect of the present invention, when the core take-out jig is pushed into the annular groove after the core is taken out, the engaging portion moves forward while sliding on the outer periphery of the core, and the presser portion is engaged with the outer periphery of the core. When pushing in further strongly, the presser part pushes the free end part of the core having a cantilevered shape in the radial direction to break the core from its root and break. When the core removal jig is pulled out after the breakage, the core that is frictionally held by the pressing portion is pulled out together with the extraction jig. Conventionally, the core has been broken by inserting a wedge or a hook into an annular groove and hitting it with a hammer, etc. After the break, the core is wound around a wire or is pulled out with a pliers. According to the take-out jig, the core can be taken out from the base by simply pushing the core take-out jig into an annular groove formed by a core drill and pulling it out.

  According to the invention of claim 2, when the core removal jig is pushed into the annular groove, the claw piece moves forward while sliding on the core peripheral surface in a state of being tilted backward, but when the core removal jig is pulled out, When only the take-out jig is pulled out and the core is left, the claw piece is raised and tries to bite into the core, so that the core is reliably pulled out together with the core take-out jig.

  According to the invention of claim 3, since there is no obstacle when extruding the core in the radial direction from the semicircular section in the projecting portion, the extrusion is sufficiently performed, thereby reliably breaking the core. You can do it.

  According to the fourth aspect of the invention, the check valve is attached to the peripheral wall of the buried object as follows. First, the slide pole is placed sideways at the opposite position of the peripheral wall of the buried object and fixed by a fixing means. Next, after rotating the base by the required amount and aligning the direction of the core bit of the core drill with the axial direction of the slide pole, the core bit and the feed mechanism are activated to advance the core drill along the slide pole and push the core bit against the peripheral wall of the embedded object. Hit to start cutting. The cutting into the peripheral wall of the embedded object is performed until the thickness of the peripheral wall of the embedded object reaches, for example, 80 to 90%. This confirmation can be performed, for example, by visually observing the degree of insertion of the core bit into the peripheral wall of the buried object, or by reading the rotational speed of a motor or the like that is the drive source of the feed mechanism with an encoder and calculating the feed amount of the slide block from this. Display on the monitor and monitor the feed amount displayed on the monitor.

  When it is confirmed that the cutting by the core bit has been performed until the predetermined amount is reached, the feeding mechanism is stopped, and then the core drill is moved backward to draw the core bit from the peripheral wall of the embedded object. After the core bit is pulled out, the feeding mechanism is temporarily stopped. When the core bit is driven to rotate, the rotation is also stopped. Then, the base is rotated by a required amount to align the core removal jig with the axial direction of the slide pole.

  Next, the feeding mechanism is activated again to advance the core take-out jig, and it is fitted into an annular groove formed by a core drill on the peripheral wall of the buried object and pushed. This pressing is performed to the extent that it matches or substantially matches the feed amount of the core bit at the time of drilling, and the pressing portion breaks the core from the root as described above. After breaking, the core removal jig is retracted and the core is extracted. Here, the advancement and retraction of the core removal jig are preferably performed continuously, but may be performed individually. After extracting the core, the base is rotated in the opposite direction to return the core drill, the core bit is rotated again and inserted into the hole from which the core has been extracted, and the cutting into the hole bottom is resumed. The incision is performed until it reaches, for example, about 95% of the wall thickness of the peripheral wall (the confirmation at this time is the same as described above, for example, by visually confirming the insertion degree of the core bit, or of the slide block displayed on the monitor. When it is determined that the predetermined amount has been reached, the feed mechanism is stopped, and then the core bit is retracted and pulled out from the hole formed in the peripheral wall of the embedded object. After that, install a check valve at the hole entrance opened in the peripheral wall of the buried object, or attach it to the valve insertion jig so that the check valve can be easily removed, and then rotate the base by the required amount. The insertion jig is aligned with the axial direction of the slide pole, the feed mechanism is activated to advance the valve insertion jig, and the check valve is pushed into the hole formed in the peripheral wall of the embedded object. After the check valve reaches the hole bottom, if the check valve is further pushed in, the thin hole bottom is broken by the check valve and opened.

  In order for the check valve to easily break the bottom of the hole, it is desirable to attach a fracture fitting provided with a protrusion at the tip of the check valve. FIGS. 3 (A) and 3 (B) show an example, in which a fractured fitting 11 obtained by obliquely cutting a steel pipe is attached to a check valve 9, and FIGS. 4 (A) and 4 (B) are different from each other. As an example, a steel core 12 having a cross-shaped cross section is fixed in a steel pipe, and a fracture fitting 11 in which one end of the core 12 is formed in a mountain shape is attached to a check valve 9. FIGS. 5 (A) and 5 (B) show still another example, in which a break metal fitting 11 having a core 12 having one end formed in a mountain shape is fixed to a check valve 9 in a steel pipe cut obliquely. It is. In the figure, reference numeral 8 denotes a packing material which is attached to the check valve 9 and seals between the inner peripheral surface of the hole formed in the peripheral wall of the embedded object and isolates the inside and outside of the peripheral wall of the embedded object.

  When the check valve described above is pushed in until the outer periphery of the buried object is reached, the feed mechanism is stopped and retracted. If the check valve is not attached to the valve insertion jig, the check valve will not be in contact with the inner peripheral surface of the hole. It remains in the hole as it is due to the frictional resistance and does not move backward with the valve insertion jig. In addition, the check valve push-in amount is also determined from the slide block feed amount displayed visually or by the monitor in the same manner as the core bit described above. After fixing the slide pole sideways in the buried object as described above, the base is rotated to switch to the core drill, core removal jig, or valve insertion jig, and to the buried peripheral wall by the core drill. The check valve is attached to the peripheral wall of the buried object by sequentially drilling the core, breaking and extracting the core with the core take-out jig, and attaching to the check valve with the valve insertion jig.

  According to the invention of claim 5, after the slide pole is fixed in the buried object, if the check valve is attached to the valve insertion jig, the series of operations from the above-described drilling to the check valve attachment is automatically performed. Can be done automatically.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
FIG. 6 is a front view showing the entire configuration of the check valve mounting device according to the present invention mounted in a manhole 21 as an embedded object, FIG. 7 is a bottom view of the same device, and the valve mounting device is a slide pole. 22, a slide block 23 slidably mounted on the slide pole 22, a base 24 supported by the slide block 23 so as to be pivotable about an axis perpendicular to the slide pole 22, and a circumferential direction on the base 24 The core drill 25, the core removal jig 26, and the valve insertion jig 27 that are attached at regular intervals radially from the axis line are described in detail below.

  The slide ball 22 has a pin-like pressing member 221 fixed to one end, a jack 222 as a fixing means for fixing the slide pole 22 to the other end, and a rack 223 attached in the longitudinal direction. Yes. When the slide block 23 moves backward and reaches a predetermined position, it has a limit switch (not shown) which is turned on and output to a controller which will be described later. When the check valve is attached to the manhole 21, the slide pole 22 is directed in the diametrical direction, the pressing member 221 at one end is applied to the manhole peripheral wall, and the jack 222 at the other end is extended by the turning operation of the handle to the opposing manhole peripheral wall. Press and fix.

  The slide block 23 meshes with a rack 223 attached to the slide pole 22 and, together with the rack 223, forms a feed mechanism (not shown), a motor 231 for driving the pinion, and the rotational speed of the motor 231. It has an encoder (not shown) as reading means for reading and reading the feed amount of the slide block 23 and a flange 232 at the lower end, and a portable controller (not shown) calculates the feed amount of the slide block 23 based on the output from the encoder. The feed amount is displayed on a monitor (not shown).

  The base 24 that is pivotally supported by the slide block 23 is provided with pin insertion portions 243 projecting at two opposite peripheral edges, and each pin insertion portion 243 has a pin insertion hole 241 having a different diameter. On the other hand, at the periphery of the flange 232 of the slide block 23 to be joined to the base 24, as shown in FIG. 8, the inner circumference having the same diameter as the pin insertion hole 241 is equally spaced in the circumferential direction. Three pin insertion holes 233 for positioning and fixing the core bit 251 of the core drill 25, the core take-out jig 26 or the valve insertion jig 27 are formed, and the pin insertion holes 233 located on the inner circumference having a large diameter, For example, 241 is used to fix the check valve 9 on the right side of the slide pole 22 fixed to the manhole 21, and the pin insertion holes 233 and 241 positioned on the inner periphery with a small diameter are, for example, the slide ball 22. It is used to secure the check valve 9 on the left. Then, when the required pin insertion hole 241 and the pin insertion hole 231 coincide with each other by turning the base 24, both the headed pins 242 constituting the second fixing means are installed together with the holes 231 and 241 as shown in FIG. The core bit 251, the core removal jig 26 or the valve insertion jig 27 can be positioned and fixed by being inserted into the holes 233 and 241. When releasing the fixation, the pin 242 is pulled out from at least the pin insertion hole 241 of both the holes 233 and 241.

  The core drill 25 is composed of a core bit 251 and a core bit driving motor 252 as well as known ones, and the motor 252 is controlled by the controller to start and stop.

  As shown in FIG. 10, the core removal jig 26 includes an annular portion 261 at the tip, a broken semicircular portion 262 having an upper half opened, and a rod 263 that connects the semicircular portion 262 to the base 24 at the axial center. Further, the annular portion 261 is formed with a claw piece 264 as an engaging portion that is inwardly spaced at an equal interval in the circumferential direction and is inclined downward. A protruding portion 265 that protrudes gradually higher toward the rear is formed at the inner central portion of the semicircular section 262 in a protruding manner.

  The valve insertion jig 27 is for pushing the check valve 9 illustrated in FIGS. 1 to 5A and 5B into the hole from which the core has been removed, and the check valve 9 can be easily removed. Alternatively, the check valve 9 may be fitted.

  This apparatus is configured as described above, and the check valve 9 is attached to the manhole peripheral wall as follows.

  First, the slide pole 22 is directed in the diameter direction of the manhole 21 located slightly above the check valve mounting position, and the handle of the jack 222 is rotated as described above to connect the pressing member 221 and the jack 222 to the manhole peripheral wall 15. And the slide pole 22 is fixed in a state of being stretched in the diameter direction of the manhole 21. Next, for example, the core drill 25, the core take-out jig 26 or the valve insertion jig 27 is grasped, and the base 24 is turned, and the core bit 251 is formed on the circumference of the flange with a large diameter toward the perforated portion of the manhole peripheral wall 15. The pin insertion hole 233 to be fitted is matched with the large-diameter pin insertion hole 241 formed in the pin insertion portion 243 that protrudes from the peripheral edge of the base 24, and the pin 242 is inserted into both the holes 233 and 241 so that the base 24 To fix. In this state, the orientation of the core bit 251 matches the axis of the slide pole 22. After the base is fixed, the pinion driving motor 231 and the core bit driving motor 252 are activated by a push button or a switch operation of a controller (not shown), and the core bit 251 is sent by a predetermined amount to be rotated and driven to move to the manhole peripheral wall 15. Start hitting. The feed amount of the core bit 251 is displayed on a monitor attached to the controller, and by monitoring this feed amount displayed, the worker cuts into the manhole peripheral wall 15 and reaches, for example, 85 to 90% of the wall thickness of the manhole peripheral wall 15. If it is judged that the motor 231 is reversely rotated by a push button or a switch operation of the controller, the motor 231 is moved backward. When the core bit 251 is further retracted after coming out of the manhole peripheral wall 15 and the slide block 23 turns on a limit switch (not shown), the drive of the pinion driving motor 231 and the core bit driving motor 252 is stopped by the output from the controller. The

  Next, the pin 242 is removed from both the holes 233 and 241 and the base 24 is turned by about 1/3 of a turn so that the core removal jig 26 is directed to the drilled portion and the pin insertion hole 233 formed on the peripheral edge of the flange is The base 24 is fixed by inserting the pin 242 into both the holes 233 and 241 so as to match with the pin insertion hole 241 of the pin insertion portion 243 projectingly formed at the periphery. In this state, the orientation of the core take-out jig 26 coincides with the axis of the slide pole 22. When the base 24 is fixed, the pin 242 may be removed from only the pin insertion hole 241 formed in the pin insertion portion 243 on the peripheral edge of the base and may be left inserted into the pin insertion hole 233. In this case, when both holes 233 and 241 are matched, the pin 242 is lowered by its own weight and inserted into the pin insertion hole 241.

  When the base 24 is fixed, a plurality of pin insertion holes 241 on the base 24 side are formed corresponding to the pin insertion holes 233 on the flange side, and two or three pins 242 are inserted into the holes 233 and 241 to form the base. 24 may be fixed.

  After fixing the base, the pinion drive motor 231 is activated by a control push button or switch operation, and the core take-out jig 26 is advanced to push the core bit 251 into the annular groove 14 of the peripheral wall 15 formed after the core bit 251 comes out (see FIG. FIG. 11). When the core take-out jig 26 is pushed to the vicinity of the innermost part of the annular groove 14, the core 12 is pushed in the direction of the arrow by the protruding portion 265 of the core take-out jig 26 and is broken from the root (FIG. 12). When the core removal jig 26 reaches the innermost part of the annular groove 14 and moves backward, the core 12 held by the claw piece 264 of the annular portion 261 is pulled out together with the core removal jig 26 (FIG. 13). The controller stores the feed amount until the push button or switch is operated at the time of cutting, that is, the feed amount until the cutting into the manhole peripheral wall is completed, and the annular groove of the core removal jig 26 is stored. 14 is carried out until the feed amount of the take-out jig 26 reaches the stored feed amount of the core bit 251. When the stored feed amount is reached, the pinion drive motor 231 is reversed, and the core take-out jig 26 is set to retreat. The core take-out jig 26 is retracted until the slide block 23 turns on the limit switch (not shown). When the limit switch is turned on, the pinion drive motor 231 stops.

  Thereafter, the base 24 is swiveled in the reverse direction by 1/3 rotation with the pin 242 removed from at least the pin insertion hole 241 formed in the pin insertion portion 243 of the base 24 among the holes 233 and 241, and the core bit 251. After the core 12 is pulled out, the holes 233 and 241 are aligned with the holes 233 and 241 toward the holes 13 formed in the manhole peripheral wall 15, and the base 24 is positioned and fixed. Then, the push button or switch of the core drill 25 is operated again to start the pinion drive motor 231 and the core bit drive motor 252, the core bit 251 is advanced and inserted into the hole 13, and the cut into the manhole peripheral wall at the hole bottom is resumed. To do. This cutting is performed while monitoring the feed amount display of the monitor, and if it is determined that the cutting has been performed to the extent that about 5% of the wall thickness of the manhole is left, the motor 231 for driving the pinion is operated by a push button or switch operation. Reverse to reverse. When the limit switch is turned on during the reverse operation, the driving of the pinion driving motor 231 is stopped. FIG. 14 shows a state in which a cut 16 is made in the bottom hole of the hole 13 formed in the peripheral wall of the manhole.

  Next, the base 24 is turned about 1/3 of a turn by inserting and removing the pin 242 to position and fix the valve insertion jig 27 toward the hole 13 formed in the peripheral wall 15 of the manhole. Next, in order to push the check valve 9 shown in FIGS. 4 (A) and 4 (B) into the inlet of the hole 13 or to be fitted into the valve insertion jig 27, a pinion drive motor is operated by a push button or a switch operation of the controller. 231 is activated, the valve insertion jig 27 is advanced, and the check valve 9 is pushed into the hole 13. The pushing operation is performed until it is determined that the valve insertion jig 27 has reached the manhole peripheral wall 15 while monitoring the feed amount of the monitor. When it is determined that the valve insertion jig 27 has reached, the pinion drive motor 231 is reversed and the valve insertion jig 27 is moved. Retreat. As described above, the valve insertion jig 27 is retracted until the slide block 23 turns on the limit switch. When the limit switch is turned on, the pinion drive motor 231 stops. Note that the length of the check valve 9 including the broken metal fitting 11 is slightly longer than the wall thickness of the manhole peripheral wall 15, so that when the valve insertion jig 27 reaches the manhole peripheral wall, the tip of the check valve 9 is formed. Breaks through the bottom wall of the hole bottom (FIG. 15). In this state, the check valve 9 is attached to the manhole peripheral wall 15.

  The above is an example in which the check valve 9 is attached to the manhole peripheral wall 15 on the right side of the slide ball 22 shown in FIGS. 6 and 7, but when the check valve 9 is attached to the manhole peripheral wall 15 on the left side of the slide ball, The same procedure is performed. In this case, among the pin insertion holes 233 formed on the peripheral edge of the flange and the pin insertion holes 241 of the pin insertion portion 243 formed protruding on the peripheral edge of the base, three pin insertion holes 233 located on the circumference having a small diameter. 241 and 241 are used, and the core drill 25, the core removal jig 26, and the valve insertion jig 27 are positioned and fixed in the same manner.

  The above work requires work by various workers such as inserting and removing the pin 242 and turning the base 24 and operating the push button and switch in the controller to mount the check valve 9, but these work should be automated. You can also. The following is an example. In the apparatus described above, a turning mechanism of the base 24 that turns the base 24 using a motor as a drive source, and a sensor (not shown) that detects the motor load of the turning mechanism and outputs it to the controller 18. 16, a pair of pins 246 that can be advanced and retracted toward the flange 232 of the slide block 23 with different diameters are provided on the base 24 as shown in FIG. 16, and each pin 246 is provided with the pin 246 on the flange 232. The coil spring 244 that constitutes the second fixing means together with the pin 246 is excited by the output from the controller, and the pin 243 is resisted against the action of the coil spring 244 to be within the base 24. When a solenoid 245 that constitutes a releasing means that is retracted is provided, and the solenoid 245 is not excited The pin 246 protrudes from the base 24 by the action of the coil spring 244 and fits into a pin insertion hole 233 formed in the flange 232, whereby the base 24 is connected to the flange 232 of the slide block 23 and fixed. It is what.

  FIG. 17 is a block diagram including the above-described controller. The controller 18 includes a storage unit 181, a calculation unit 182, a comparison unit 183, and a control unit 184. In addition to the check valve installation program, the inner diameter of the manhole 21, the wall thickness of the manhole peripheral wall 15, the distance from the base 221 to the limit switch 185, the cut amount of the manhole peripheral wall 15, the length of the check valve 9, etc. are input. Further, as described above, the feed amount of the slide block 23 when it is cut by the core bit 251 is stored. The controller 18 also has a monitor 19 composed of a liquid crystal display for displaying various data and the progress of check valve installation.

  The calculation unit 182 has a function of calculating the feed amount of the slide block 23 and the cut amount of the manhole peripheral wall 15 from the feed amount based on the output from the encoder 185 that reads the rotational speed of the pinion drive motor 231.

  The comparison unit 183 compares the cut amount of the manhole peripheral wall 15 calculated by the calculation unit 182 with the set cut amount, and when they match, the load of the motor of the turning mechanism detected by the sensor becomes the threshold value. When it reaches, it outputs to the control part 184.

  The control unit 184 controls the pinion drive motor 231, the core bit drive motor 252, the solenoid 245, and the like based on outputs from the comparison unit 183, the limit switch 185, and the sensor that detects the load of the motor of the turning mechanism. Data and check valve installation progress are displayed.

  Next, an example of a check valve mounting method using this apparatus will be described based on the flowchart of FIG.

  First, the slide pole 22 is fixed in the diameter direction in the manhole 21 as described above, the inner diameter of the manhole 21, the thickness of the manhole peripheral wall 15, the distance from the pressing member 221 to the limit switch 185, and the manhole peripheral wall 15 , The length of the check valve 9, the mounting position of the check valve 9, that is, whether it is mounted on the right side or the left side of the slide pole 22 (the pin 243 positioned on the circumference of the small or large diameter thereby) Is retracted into the base against the action of the spring 244 and is inactivated) and the like is input to the controller 18 using a keyboard or the like. Further, the check valve 9 is attached to the valve insertion jig 27, and the direction of the core drill 25 is set so as to coincide with the axis of the slide pole 22.

  Next, the start switch 186 of the controller 18 is turned ON, and the check valve mounting work is started (S1). Then, the pinion driving motor 231 and the core bit driving motor 252 are activated, the core bit 251 advances while rotating, reaches the manhole peripheral wall 15, and starts cutting the manhole peripheral wall 15 (S2). The feeding amount of the core bit 251, that is, the slide book 23 is calculated by the calculation unit 182 from the rotation number of the pinion drive motor 231 read by the encoder as the reading unit as described above, and the cut into the manhole peripheral wall 15 is calculated. Then, the comparison unit 183 compares the cut amount into the manhole peripheral wall 15 with a set cut amount, for example, an amount corresponding to 90% of the wall thickness of the peripheral wall. When the set cut amount is reached (S3), the pinion drive The motor 231 is reversely rotated to move backward (S4). When the limit switch 185 is turned on during reverse (S5), the pinion drive motor 231 is stopped by the output from the controller 18 and the solenoid 245 is excited (S6), and the pin 243 resists the action of the coil spring. Retract into 24. Then, the base turning motor is activated to turn the base 24 (S7). Simultaneously with the turning of the base 24, the excitation of the solenoid 245 is canceled, and the pin 243 tries to protrude by the action of the spring 244, but it is held by the flange periphery of the slide block 23. When the base 24 rotates by 1/3 and the pin insertion hole 233 formed on the periphery of the flange matches the pin 243, the pin 243 is fitted into the pin insertion hole 233, whereby the base 24 is positioned and fixed. To the core take-out jig 26. As the base 24 is fixed, when the load of the turning motor increases and exceeds the threshold value (S8), the turning motor stops and the pinion drive motor 231 starts (S9). The core removal jig 26 moves forward (S10). Then, when it moves forward until it matches the cutting depth (S11), the pinion drive motor 231 rotates in the reverse direction, and the core removal jig 26 moves backward (S12). As described above, the core 12 is broken from the root and pulled out by the advancement and retreat of the core take-out jig 26 as described above.

  When the core removal jig 26, that is, the slide block 23 is retracted and the limit switch 185 is turned on (S13), the pinion drive motor 231 is stopped by the output from the controller 18 and the solenoid 245 is excited (S14). The pin 243 is retracted into the base 24. Then, the turning motor is activated to reversely rotate, and the base 24 is turned in the reverse direction (S15). Simultaneously with the turning of the base 24, the excitation of the solenoid 245 is canceled. When the base 24 rotates in reverse by 1/3, the pin 243 is fitted into the pin insertion hole 233, whereby the base 24 is positioned and fixed and switched to the core drill 25 again. When the load of the turning motor that rises as the base 24 is fixed exceeds a threshold value (S16), the turning motor stops and the pinion drive motor 231 is activated (S17). Then, the core bit 251 moves forward. When the core bit 251 enters the drawn hole 13 of the core 12 and reaches the hole bottom, the cutting is resumed (S18). When the depth of cut reaches a set amount, for example, an amount corresponding to 5% of the wall thickness of the manhole peripheral wall (an amount corresponding to a wall thickness of 95% from the inner peripheral surface of the peripheral wall) (S19), the subroutine a is repeated. That is, when the core bit 251 is retracted (S4) and the limit switch 185 is turned ON (S5), the pinion drive motor 231 is stopped and the solenoid 245 is excited (S6), and the base 24 can turn. Next, the base turning motor 247 is activated to rotate the base 24 by 1/3 (by this, switching to the valve insertion jig 27 is performed) (S7), the positioning is fixed and the pinion driving motor 231 is activated (S7). S8, S9). When the pinion drive motor 231 is activated, the valve insertion jig 27 with a check valve attached to the tip moves forward (S20), and when it reaches a set amount (S21), it moves backward (S22). At the time of retreat, the check valve comes out of the valve insertion jig 27 by the frictional resistance with the peripheral wall and is held in the hole 13. When the valve insertion jig 27 is retracted and the limit switch 185 is turned on (S23), the pinion drive motor 231 is stopped (S24). As described above, the check valve is automatically attached to the peripheral wall of the manhole.

Sectional drawing which shows an example of the non-return valve used by this invention. Sectional drawing of another example of a non-return valve. The figure which shows the non-return valve which attached the fracture | rupture metal fittings. The figure which shows the non-return valve which attached the fracture | rupture metal fitting of another aspect. The figure which shows the non-return valve which attached the fracture | rupture metal fitting of another aspect. The front view of the non-return valve attachment apparatus which concerns on this invention attached to the manhole. Bottom view The figure which shows arrangement | positioning of a pin insertion hole. Sectional drawing which shows the fixed state by a pin. Sectional drawing of a core removal jig | tool. The figure which shows a state when pushing a core extraction jig | tool into an annular groove. Sectional drawing which shows a state when a core is fractured | ruptured. The figure which shows a state when a core is pulled out. Sectional drawing of the hole which cut out the core bit after making a cut again with a core bit. Sectional drawing which shows the state which fractured | ruptured the hole bottom. The front view of the mechanism which advances and retracts a pin. The block diagram of a controller. flowchart

Explanation of symbols

1a..Inner cylinder 1b..Outer cylinder 2,5..Filters 3, 4, 9, ..Check valve 6..Spring 8..Packing material 11..Rupture bracket 12..Core 13..Hole 14. -Annular groove 15-Manhole peripheral wall 16-Cutting 17-Core 21-Manhole 22-Slide pole 23-Slide block 24-Base 25-Core drill 26-Core extraction jig 27-Valve insertion Jig 221 ..Pushing member 222 ..Jack 223 ..Rack 231 ..Pinion drive motor 232 ..Flanges 233, 241 ..Pin insertion holes 242, 246 ..Pin 243. -Coil spring 245-Solenoid 251-Core bit 252-Core bit drive motor 261-Ring portion 262-Semi-circular portion 263-Rod 264-Claw piece 265- Out section

Claims (5)

  Drilling the peripheral wall of the buried object using a core drill, drilling the part corresponding to the majority of the wall thickness of the peripheral wall, temporarily interrupting the drilling work, pulling out the core bit of the core drill, and then using the core bit on the peripheral wall of the buried object A core take-out jig that is inserted into the formed annular groove, and at least the tip part is annular, and a locking part that locks to the core surrounded by the annular groove is provided on the inside, and is locked. Protrusion that gradually increases the amount of inward protrusion toward the rear of the part, and when the core removal jig is pushed firmly into the annular groove, the protrusion pushes the core in the radial direction and breaks the core from its root Then, when the core removal jig is pulled out, the core held by the locking portion is extracted.   The core take-out jig according to claim 1, wherein the locking portion is a claw piece projecting obliquely rearward.   The core take-out jig according to claim 1 or 2, wherein the rear part has a semicircular cross section, and the projecting part is formed at an intermediate part of the semicircular cross section.   A slide pole, a fixing means for detachably fixing the slide pole to a position opposite to the embedded peripheral wall, a slide block slidably mounted on the slide pole, and the slide block along the slide pole A feed mechanism, and a base supported by the slide block so as to be pivotable about an axis perpendicular to the slide pole. The base has a core bit for drilling a peripheral wall of the manhole, and the core bit is driven to rotate. The core unloading jig according to claim 1, wherein the core is broken and pulled out from the base by being pushed into and pulled out from an annular groove of a manhole peripheral wall formed by the core bit, and the core unloading jig according to claim 1, and the core unloading jig Valve insertion jig that pushes the check valve into the hole formed after the core is extracted by the jig There check valve mounting device for underground installations floating preventing, characterized in that mounted at an radially from said axis.   Reading means for reading the feed amount of the slide block sent by the feed mechanism, turning means for turning the base, and second fixing means for positioning and fixing the base when the base turned by the turning means turns a predetermined amount And a releasing means for releasing the fixing of the base by the second fixing means, and a control means for controlling the feeding mechanism, the core bit driving motor, the turning mechanism of the base and the releasing means by the input from the reading means. The check valve mounting device for preventing underground objects from rising according to claim 4.

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