KR101867920B1 - Equipment for screw tightening and loosening of mold used for fabrication PHC pile - Google Patents

Abstract

The present invention relates to an automatic fastening and disassembling apparatus for a PHC file mold fastening bolt.
Accordingly, it is a technical object of the present invention to enable fastening and unlocking of fastening bolts during fastening (unlocking) of a forming mold for producing a PHC file to be made quickly and precisely through automated lines, And it is possible to remarkably improve the post-maintenance and repair cost reduction with the extension of the life of the mold.
That is, the present invention is characterized in that a predetermined error, which is caused by machining error or process tolerance, is overcome in an automation facility in consideration of the fact that the mold is an automation facility that minimizes manpower.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for screw tightening and loosening of a mold,

The present invention enables fastening and unlocking of fastening bolts in a bolting operation (locking and unlocking) of a molding mold for producing a PHC file to be performed quickly and precisely through an automated line, The mold lifetime can be prolonged, and the post management and repair cost can be remarkably improved. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a PHC file mold fastening bolt automatic tightening and disassembling device.

Generally, when a building or structure is built, foundation work is carried out to reinforce the ground in order to support the structure according to the condition of the ground or the load of the structure.

For this purpose, a PHC file (Pretensioned spun High strength Concrete Pile) is widely used. The PHC file is superior to the PC file in the axial load bearing capacity, is strong against impact, and has a great bending strength.

Generally, a step of manufacturing a PHC file will be briefly described as follows.

First, the PC steel bar, which is the root of the file, is cut to the length of the file, and both ends are processed into a structure capable of fixing during tensioning.

Then, the steel reinforcing bar is welded to the steel reinforcing bar, which is the main steel reinforcing bar, and the diameter of the reinforcing bar length is determined by the diameter of the pile.

Then, the front end of the file, the joint portion, the shoe constituting the lower portion, and the reinforcing band are assembled. At this time, the assembling is carried out while placing the reinforcing bars in the lower part of the mold frame.

Then, after a predetermined amount of concrete is put into a mold (mold), the upper mold (upper mold) is put on the lower mold, assembled, and then the bolts are fastened and integrated.

Then, a tension is applied to the file by a calculated amount by which a predetermined prestress is applied to tighten the PC steel bar, and then both ends are fixed with the tension maintained.

Then, the mold is rotated on the centrifugal table for forming the thickness of the pile and the compaction is carried out, and the concrete inside the mold is formed by using centrifugal force to form the shape, and the product is formed into a cylindrical shape.

In order to accelerate the curing of the product, it is necessary to carry out atmospheric steam curing, which is a kind of accelerated curing, and then to take the product out of the mold frame.

As described above, in the conventional method of manufacturing a PHC file, as shown in FIG. 15, in the process of locking or unlocking a large number of bolt fastenings during mold assembly during the process, a single operator or many workers must manually perform the bolting operation A problem arises.

That is, in order to manufacture a PHC file, a top cover of a cylindrical mold whose cross section is divided into upper and lower sides of a semicircular shape is loosened to remove a plurality of fastening bolts, then a wire mesh is inserted, concrete is inserted, A process of centrifugal molding is necessarily accompanied.

Conventionally, the fastening and disassembly of the PHC file mold is carried out in such a manner that one person is placed on each side of the mold to manually operate the impact wrench and fasten and disassemble a plurality of bolts, In addition, there is a risk of injury to the workpiece due to musculoskeletal injuries (impact wrench work by the manpower). In particular, the work of locking and unlocking with a constant torque is not performed, so that the damage of the mold and the breakage of the bolt continue In fact.

In other words, many bolts fastening and disassembling are carried out by using an impact wrench, which requires at least 4 manpower, and it is difficult to fasten the bolts with a constant force due to the speciality of the process being performed manually. It is also a cause.

Therefore, it is necessary to reduce the workforce and to tighten the mold with a certain clamping force. The number of fastening bolts and the gap between the bolts are not constant, and the position control using the sensor is not easy due to malfunction It has been difficult to put it into practical use in the past.

1. Korean Registered Patent No. 10-0975562 (registered on Aug. 06, 2010)

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is a technical object of the present invention to provide a method and apparatus for fastening and unlocking a fastening bolt during a bolting operation (locking and unlocking) This can be achieved by eliminating labor force and labor accidents and by extending the life of the mold (due to the characteristics of automatic impact, it is possible to perform work with constant torque and prevent mold and bolt burnout) The present invention provides an automatic fastening and disassembling apparatus for a PHC file mold fastening bolt, which is capable of remarkably improving the performance of the PHC file mold fastening bolt.

That is, the present invention has an object of providing an automatic facility which minimizes manpower, in which a predetermined error due to a machining error or a process tolerance is overcome in an automation facility in consideration of the fact that the mold is a sewage pipe.

In the present invention, since all the processes are automatically performed during the binding and unlocking of the fastening bolts to the mold, it is possible to reduce the workload of the additional personnel (workers) The present invention has been made to solve the above problems.

In order to achieve the above object, according to the present invention, when the wearing of the mold 40 is confirmed in the tunnel type frame 10, the diameter of the mold 40 is sensed, The horizontal feed motor 110 is formed on one side of the up-down frame 20 so that the feed operation can be performed. The horizontal feed motor 110 includes a drive sprocket 120, a chain 130, a right and left symmetrical male shaft 140, A horizontal movement unit 100 for moving the impact wrench arrangement frame 310 in the left and right directions while sequentially linking with a driving sprocket 160 and a driving chain 170, )Wow; The vertical drive motor 210 mounted on one side of the upper end of the tunnel type frame 10 includes a drive sprocket 220, a chain 230, a bevel gear box 240, and a rack jack (not shown) The tunnel type frame 10 is formed so as to move up and down the frame 20 while interlocking sequentially with the frame members 250 and RACK JACK in the form of a series of drive lines. 40 and the end portion of the mold 40. When the control unit (main panel) confirms the receipt signal information of the mold 40, the drive line including the vertical drive motor 210 is operated A vertical moving device unit 200 for moving the vertical moving device 200; The Impact Wrench Alignment Frame 310 is coupled to the lower end of the female screw boss 150 of the horizontal movement device unit. The Impact Wrench Alignment Frame 310 includes a plurality of impact wrench sliders (not shown) The impact wrench slider 320 includes an impact wrench frame 300 having a connection bracket 330 for coupling the impact wrench 410 to the lower part of the impact wrench slider 320. And an impact wrench 410 having a joint chuck 411 is formed to be coupled to the joint bracket 330 of the impact wrench frame to be automatically driven by pneumatic pressure. In the impact chuck 411 of the impact wrench, An articulated impact wrench 400 for releasably attaching a socket wrench 430 with a holder 420 thereon; .

The impact wrench frame 300 includes a plurality of compression springs 340 installed between the impact wrench sliders 320 on the line of the impact wrench arrangement frame 310 so that the tightening shaft of the fastening bolt 50 is biased Even if the pitch pitch interval is not constant, fluid pressure tightening is performed when the vertical axis is inserted.

The impact wrench slider 320 is coupled with a bearing 350 that is rotated by a hinge 360 on an upper surface or a lower surface of the impact wrench arrangement frame 310 to contact the fastening bolt 50 Even if a vertical axis gap (gap) is generated, a fluid pressure tightening is performed.

As described above, the technical object of the present invention is to make fastening and unlocking of fastening bolts possible to be carried out quickly and precisely through an automated line during the bolting operation (locking and unlocking) of a molding mold for producing a PHC file, And elimination of industrial accidents and extension of the mold life (due to the characteristic of automatic impact, it is possible to perform work with constant torque and prevent mold and bolt burnout) It is effective.

In other words, the present invention has an effect of overcoming a certain error due to machining errors and process tolerances in an automation facility in consideration of the fact that the mold is an automatic apparatus that minimizes manpower.

In the present invention, since all the processes are automatically performed during the binding and unlocking of the fastening bolts to the mold, it is possible to reduce the workload of the additional personnel (workers) It is possible to reduce the production cost and the productivity.

1 is an exemplary view of an automatic fastening and disassembling apparatus for fastening bolts of a PHC file mold according to the present invention,
Fig. 2 is an enlarged front view of Fig. 1,
Fig. 3 is an enlarged view of a side part of Fig. 2,
Fig. 4 is an enlarged plan view of Fig. 2,
5 to 8 are views illustrating an example of a horizontal moving unit according to the present invention,
9 to 11 are views illustrating an example of a vertical movement device according to the present invention,
12 to 14 are views showing an example of an articulated impact wrench according to the present invention,
15 is an exemplary view showing a conventional impact wrench bolt fastening method.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the accompanying drawings.

1 to 14, the PHC file mold automatic fastening and disassembling apparatus of the present invention includes a horizontal moving device 100, a vertical moving device 200, an impact wrench frame 300, Type impact wrench unit 400 as shown in FIG.

When the mold 40 is received in the tunnel type frame 10, the horizontal movement device 100 senses the diameter of the mold 40, and then moves the left and right molds 40 in accordance with the positions of the fastening bolts 50 formed on the outer circumferential surface of the mold 40. [ The horizontal feed motor 110 is formed on one side of the up-down frame 20 so that the widthwise feed is operable.

The horizontal feed motor 110 includes a drive sprocket 120, a chain 130, a right and left symmetrical male shaft 140, a female boss 150, a drive sprocket 160, and a drive chain 170 And the impact wrench arrangement frame 310 is formed so as to be transported in the left and right width directions while sequentially interlocking with each other.

The vertical driving unit 210 installed on one side of the top of the tunnel type frame 10 includes a drive sprocket 220, a chain 230, A bevel gear box 240, and a rack jack 250. The up / down frame 20 is connected to the bevel gear box 240 and the rack jack 250 through a series of driving lines.

At this time, a sensing sensor is formed on the input / output end side of the tunnel type frame 10 so as to sense the entrance and the end of the mold 40 entering through the chain conveyor 30 so that the control unit (main panel) ) Is confirmed, the driving line including the vertical driving motor 210 is operated.

The Impact Wrench Arrangement Frame 310 is mounted on the lower end of the female screw boss 150 of the Horizontal Arrangement Unit so that the Impact Wrench Arrangement Frame 310 is aligned with the longitudinal axis of the Impact Wrench Arrangement Frame 310, A plurality of impaction wrench sliders 320 are formed so as to correspond to the positions of the bolts and the impaction wrench slider 320 is formed to have the connection brackets 330 so that the impact wrenches 410 are coupled to the lower side.

At this time, the impact wrench frame part 300 has the compression spring 340 installed between the impact wrench slider 320 on the line of the impact wrench arrangement frame 310 so that the tightening axis of the fastening bolt 50 is biased Even if the pitch pitch interval is not constant, fluid pressure tightening is performed when the vertical axis is inserted.

The articulated impact wrench 400 is coupled to the connection bracket 330 of the impact wrench frame so as to form an impact wrench 410 having a mating chuck 411 so as to be automatically driven by pneumatic pressure. A socket wrench 430 having a fastening bolt holder 420 is detachably attached to the coupling chuck 411 of the impact wrench.

At this time, the impact wrench slider 320 is coupled to a bearing 350 which is rotated by a hinge 360 on an upper surface or a lower surface of the impact wrench arrangement frame 310 so as to contact the fastening bolt 50 Even if a vertical axis gap (gap) is generated, a fluid pressure tightening is performed.

In other words, the impact wrench frame portion is formed such that a connecting bracket is formed at an interval equal to a constant PITCH interval of the fastening bolt to assemble the impact wrench, and a compression spring and a bearing are inserted and formed between the impact wrench slider, A wrench slider is formed to facilitate sliding in the impact wrench frame.

This is because the lower portion of the fastening bolt holder is widened to provide a slight clearance in case the fastening bolt of the mold is inclined, so that the fastening bolt holder smoothly seats on the fastening bolt head when the fastening bolt holder is lowered.
In other words, even if the fastening bolt holder 420 is formed to be wide in the shape of a vertically downward light and has an open lower end face inclined with respect to the vertical axis, the entry area is widened so that the fastening bolt holder 420 smoothly As shown in Fig.

As described above, the articulated impact wrench unit 400 includes a fastening bolt holder, a connecting rod, a socket wrench, and an impact wrench.

At this time, according to the diameter of the mold, the impact wrench unit is fixedly positioned by the information of the control unit (main panel), and the operation of the vertical movement unit and the tightening bolt holder are moved to the head of the fastening bolt of the mold At the same time, air is supplied to the immrench wrench, and when the bolt tightening is completed, the supply of air is cut off and the vertical movement unit returns to the next working position by the operation of the vertical movement unit. At the same time, Work.

In other words, the present invention comprises a sensor unit, a control unit (main panel), a vertical movement unit, a horizontal movement unit, an impact wrench frame unit, and an articulated impact wrench unit, and is designed to cope with a change in diameter and length of the mold .

In the present invention, the work range is set to the tire 1 section once, and the work is repeatedly performed. In order to solve the minute error of the interval between the bolts, the impact wrench includes a spring device, an articulated socket device, Are preferably applied.

Further, a rubber is mounted between the impact wrench frame part and the impact wrench to absorb the impact generated therebetween.

This will be described in more detail as follows.

First, the PHC file mold is divided into 1M units from 6M to 15M, and the length of the mold is also divided into 1M units from 10M to 17M.

In addition, each mold is subjected to centrifugal molding on a centrifugal table on which a two-axis wheel rotates, and a plurality of rings Shaped tire is fitted in the cylindrical mold.

Accordingly, the fastening / dismounting operation of the seven fastening bolts in the 2M section between the tire and the tire of the mold is set to the working range once, and the fastening bolt is configured to be symmetrical in the cross sectional direction of the cylindrical mold , And is constructed so that the machine is constituted by a recuperative type and 14 bolts are simultaneously fastened and disassembled.

Accordingly, the present invention is formed to detect the diameter of the mold by being mounted on a chain conveyor that advances the mold in the X-axis direction.

That is, in the Z-axis direction of the present invention, a plurality of sensor units for controlling the interval between the left and right impacts and a plurality of sensor units for sensing the moment when the mold tires are passed and controlling the vertical movement of the apparatus in the Y- A control unit (main panel) for controlling the operation by receiving the signal detected by the sensor is constituted.

In this case, a vertical movement unit for vertical movement in the Y-axis direction of the present invention is formed, and a horizontal movement unit for adjusting the interval of the left and right impact wrenches corresponding to the change in the diameter of the mold is formed. And a plurality of articulated impact wrenches for coping with the difference in the fine bolt spacing are formed to form an integral automation device.

The operation principle of the present invention is as follows. The fastening and dismounting are performed in the same way, but only in the direction of rotation of the impact wrench.

First, the left and right impact wrench frame sections are automatically vertically moved to a position where there is no interference with the mold in a state where the operation of the preceding mold has been completed.

When the mold that is to be loaded on the conveyor chain arrives and passes through the Z-axis sensor section, the sensor senses the diameter of the mold and gives information to the control panel. The control panel controls the mold transfer conveyor And commands to open or close the impaction wrench frame according to the mold diameter.

Then, when the horizontal movement is completed, the vertical moving device is operated and the articulated impact wrench is lowered to the position of the fastening bolt. When the bolt is fastened to the conical impact socket, 14 impaction wrenches are simultaneously rotated, This is done for a certain period of time.

After a certain time, the impact will automatically move 100MM vertically from the current position, and when the movement is completed, the mold transfer conveyor is operated again in the control panel to send the mold in the X axis direction.

When the second tire passes through the Y-axis sensor, the sensor gives the position information of the mold to the control panel. In the control panel, the transfer of the mold is established and the vertical moving part is operated to connect the fastening bolt with the impact wrench. In the same way, the work is carried out twice and the work is repeated until the last tire passes through the Y-axis sensor.

The control panel, which receives the signal from the sensor that has completed the last rotation work, vertically feeds the impact wrench frame to the first position at the same time as the work is finished, and waits for the next work. The chain conveyor is operated and the next work .

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the present invention as defined by the appended claims and their equivalents. Of course, such modifications are within the scope of the claims.

10 ... frame 20 ... up-down frame
30 ... chain conveyor 40 ... mold
50 ... fastening bolt
100 ... Horizontal moving unit 110 ... Horizontal feed motor
120 ... drive sprocket 130 ... chain
140 .. Male shaft 150 ... Female thread boss
160 ... drive sprocket 170 ... drive chain
200 ... vertical movement device 210 ... vertical drive motor
220 ... drive sprocket 230 ... chain
240 ... Bevel gearbox 250 ... rack jack
300 ... Impact Wrench Frame 310 ... Impact Wrench Adjuster Frame
320 ... Impact wrench Slider 330 ... Connection bracket
340 ... compression spring 350 ... bearing
360 ... hinge
400 ... articulated impaction wrench part 410 ... impact wrench
411 ... coupling chuck 420 ... fastening bolt holder
430 ... socket wrench

Claims (3)

When the mold 40 is received in the tunnel frame 10, the diameter of the mold 40 is sensed, and the up-down frame 20 is moved in the lateral direction in accordance with the position of the fastening bolt 50 formed on the outer circumferential surface of the mold 40, A horizontal transfer motor 110 is formed on one side of the horizontal transfer motor 110. The horizontal transfer motor 110 includes a drive sprocket 120, a chain 130, a right and left symmetrical male shaft 140, a female screw 150 (BOSS), a drive sprocket 160, and a drive chain 170, and sequentially transferring the impaction wrench arrangement frame 310 in the widthwise direction; The vertical drive motor 210 mounted on one side of the upper end of the tunnel type frame 10 includes a drive sprocket 220, a chain 230, a bevel gear box 240, and a rack jack (not shown) The tunnel type frame 10 is formed so as to move up and down the frame 20 while interlocking sequentially with the frame members 250 and RACK JACK in the form of a series of drive lines. 40 and the end portion of the mold 40. When the control unit (main panel) confirms the receipt signal information of the mold 40, the drive line including the vertical drive motor 210 is operated A vertical moving device unit 200 for moving the vertical moving device 200; The Impact Wrench Alignment Frame 310 is coupled to the lower end of the female screw boss 150 of the horizontal movement device unit. The Impact Wrench Alignment Frame 310 includes a plurality of impact wrench sliders (not shown) The impact wrench slider 320 includes an impact wrench frame 300 having a connection bracket 330 for coupling the impact wrench 410 to the lower part of the impact wrench slider 320. And an impact wrench 410 having a joint chuck 411 is formed to be coupled to the joint bracket 330 of the impact wrench frame so as to be automatically driven by pneumatic pressure. In the impact chuck 411 of the impact wrench, An articulated impact wrench 400 for releasably attaching a socket wrench 430 with a holder 420 thereon; A PHC file mold fastening bolt automatic fastening and disassembling device comprising:
The impact wrench frame unit 300 includes a compression spring 340 installed between the impact wrench slider 320 on the line of the impact wrench arrangement frame 310 so that the tightening axis of the fastening bolt 50 is biased, The impact wrench slider 320 includes a bearing 350 rotated by a hinge 360 on an upper surface or a lower surface of the impact wrench arrangement frame 310, Is formed so as to be fluidly press-fitted even if a vertical gap is generated between the fastening bolt 50 and the seat of the fastening bolt 50 due to a machining error. The fastening bolt holder 420 has an open lower end face So that even when the fastening bolt 50 is inclined with respect to the vertical axis, it is formed so as to be smoothly seated on the fastening bolt head at the time of descending, PHC piles mold fastening bolt automatic tightening and disassembly device according to claim a.
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