CN114653810A

CN114653810A - Full-automatic square pile end plate processing equipment

Info

Publication number: CN114653810A
Application number: CN202210398541.9A
Authority: CN
Inventors: 朱宇杰
Original assignee: Jiashan Dehong Hardware Processing Factory
Current assignee: Jiashan Dehong Hardware Processing Factory
Priority date: 2022-04-16
Filing date: 2022-04-16
Publication date: 2022-06-24

Abstract

The invention discloses full-automatic square pile end plate machining equipment which comprises a workbench and an installation frame, wherein an installation seat is fixedly installed on the top surface of the workbench, a lifting seat is movably installed on the front surface of the installation seat, a double-shaft operating system is movably installed on the top surface of the installation frame, a pneumatic type clamping tool is movably installed on the surface of the double-shaft operating system, and a full-automatic cleaning assembly is movably installed inside the front surface of the workbench. According to the invention, the processing precision and the production efficiency of the square pile end plate can be higher by arranging the double-shaft operating system, the pneumatic clamping tool and the full-automatic cleaning assembly; the labor intensity of workers is reduced, and the safety is improved; the clamping plate clamping head can adapt to clamping plates with different thicknesses, so that the integral processing range of the equipment is expanded; before die-casting, at first blow with the air cock other side's pile end plate, can blow away the waste material and cool down to the pressure head, prevent to influence the suppression quality because of the waste material, prevent that the pressure head high temperature from influencing the suppression quality.

Description

Full-automatic square pile end plate processing equipment

Technical Field

The invention relates to the technical field of square pile end plate machining, in particular to full-automatic square pile end plate machining equipment.

Background

The hollow square pile end plate is mainly used for anchoring a prestressed tension steel bar in the production of a hollow square pile and pile extension in construction, the main structure of the hollow square pile end plate is a square steel plate, tension steel bar positioning counter bores with the number consistent with that of main steel bars of the hollow square pile are arranged on the surface of the steel plate, in the process of manufacturing the prestressed concrete hollow square pile, a steel bar cage main steel bar penetrates through the square pile end plate and is fixed in the tension steel bar positioning counter bores, the steel bar is tensioned through tensioning bolts of tensioning bolt anchoring holes, prestress is applied to the steel bar, the end plate bears pressure when the steel bar is tensioned and bears jacking pressure when the pile is driven, therefore, in order to ensure a certain strength requirement, the thickness of the end plate of the existing prestressed concrete hollow square pile is generally between 18 and 22mm, the thickness of the whole end plate is uniform, and more steel is consumed, the production cost is high, and a set of automatic equipment can be used for batch processing when the square pile end plate is produced.

Although the existing processing equipment can be used for mass production, the equipment also has a plurality of problems during production, when a plurality of plates are processed, corresponding equipment intelligently moves the plates in a one-way, so that the processing precision of the whole equipment is not high enough, the quality requirement of batch production is reduced, secondly, a lot of steel scraps are generated in the stamping process, the steel scraps are easy to butt joint in a stamping area after long-time work, at the moment, workers are required to clean the steel scraps, otherwise, the working process of the whole equipment is influenced, the environmental protection performance of the equipment is reduced, the existing fixture device cannot adjust various angles, and therefore the production precision and efficiency of the whole device can be further reduced by the single-shaft operating system corresponding to the fixture device, so that the machining efficiency of the whole end plate is lowered, and long-term planning is not facilitated.

Therefore, the inventor aims to provide full-automatic square pile end plate processing equipment by taking the experience of abundant design development and actual manufacturing of related industries for years and researching and improving the existing structure and deficiency so as to achieve the purposes of high processing precision, good environmental protection performance, simple operation and multiple adaptive specifications.

Disclosure of Invention

In order to overcome the defects in the prior art, the embodiment of the invention provides full-automatic square pile end plate processing equipment, so that the square pile end plate has higher processing precision and higher production efficiency; the labor intensity of workers is reduced, and the safety is improved; the clamping chuck of the clamping plate can adapt to clamping plates with different thicknesses, so that the processing range is expanded; before die-casting, at first blow with the air cock other side's pile end plate, can blow away the waste material and cool down to the pressure head, prevent to influence the suppression quality because of the waste material, prevent that the pressure head high temperature from influencing the suppression quality to solve the problem that proposes in the above-mentioned background art.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a full-automatic square pile end plate processing equipment, includes workstation and mounting bracket, the top surface fixed mounting of workstation has the mount pad, the front movable mounting of mount pad has the seat that goes up and down, the top surface movable mounting of mounting bracket has biax operating system, biax operating system's surface movable mounting has pneumatic type centre gripping frock, the positive inside movable mounting of workstation has full-automatic clearance subassembly.

In a preferred embodiment, a frame body is fixedly installed on the top surface of the installation frame, and protection plates are fixedly installed at the front end and the rear end of the top surface of the installation frame.

In a preferred embodiment, biax operating system includes first slide rail, the top surface fixed mounting of first slide rail has buffering dog, the movable surface mounting of first slide rail has first sliding stand, first screw rod is installed to the bottom screw thread of first sliding stand, the top surface fixed mounting of first sliding stand has the second slide rail, the one end fixed mounting of second slide rail top surface has drive arrangement, drive arrangement's one end is fixed to have cup jointed the second screw rod, the top surface fixed mounting of second slide rail has the warning dog.

In a preferred embodiment, a driving ring is threadedly mounted on the surface of the second screw, a second sliding table is fixedly mounted at the top end of the driving ring, a long plate is fixedly mounted at the top end of the second sliding table, a positioning plate is fixedly mounted on the back surface of the right end of the long plate, and the top surface of the bottom end of the long plate is provided with a toothed structure.

In a preferred embodiment, the buffer stop is made of resin, the number of the buffer stop is two, the two buffer stops are respectively and fixedly mounted at the left side and the right side of the first slide rail, one end of the first screw rod is rotatably mounted in the protection plate, and the other end of the first screw rod is fixedly sleeved with a driving device.

In a preferred embodiment, pneumatic type centre gripping frock includes the main board, the round hole has been seted up to the one end of main board, the bottom demountable installation of round hole has main chuck, the front of main board is rotated and is installed well axostylus axostyle, the bottom surface fixed mounting of well axostylus axostyle has the bottom plate, the threaded hole is seted up on the surface of bottom plate, the internal thread of screw hole installs the bolt, the surface slidable mounting of bolt has rectangular board, the front demountable installation of main board left end has the cylinder, the bottom movable mounting of cylinder has the spheroid, the fixed intercommunication in side of cylinder has the air cock.

In a preferred embodiment, the number of the bolts is four, four the bolts are equally divided into two groups, one group of the bolts are detachably mounted on one side of the bottom plate, the inner wall of the bottom plate is fixedly mounted on the side surface of the long plate, a hose is fixedly sleeved on the side surface of the air faucet, and the air faucet is pneumatically connected with a pneumatic device through the hose.

In a preferred embodiment, the bottom surface of the main chuck is provided with a toothed structure, and the shape of the main chuck is matched with that of the bottom end of the long plate.

In a preferred embodiment, the left side of the bottom surface of the lifting seat is fixedly provided with an air blowing pipe, the middle part of the bottom surface of the lifting seat is detachably provided with a stamping column, the right side of the bottom surface of the lifting seat is fixedly provided with a baffle, the top surface of the workbench is provided with an oblique square groove, and the front surface of the workbench is provided with a mounting groove.

In a preferred embodiment, full-automatic clearance subassembly is including collecting box and drive column, the side fixed mounting who collects the box has the erection column, collect the box and pass through erection column demountable installation on the right side surface of workstation, the one end fixed mounting of drive column has the connecting rod, the fixed surface of connecting rod installs the screw thread ring, the circular slot has been seted up to the side of workstation, the circular slot communicates with each other with the rhombus groove, just the shape and the screw thread ring looks adaptation of circular slot, drive column demountable installation is in the inside of mounting groove.

The invention has the technical effects and advantages that:

1. according to the invention, after the object plate is aligned by the positioning plate, the air cylinder is ejected by the air nozzle by using the existing pneumatic equipment, the left end of the main clamping plate is driven to rise after the air cylinder is ejected, the main clamping head at the right end clamps the object plate along with the descending of the right end, the long lath plate can be adjusted according to the specification of the object plate before the process, the bolt is loosened, the position fixing can be completed by screwing the bolt after the long lath plate is moved to a proper position, and then the processing work of the object plate can be carried out by matching the double-shaft operating system and the stamping column.

2. The invention firstly carries out air pressure operation before the equipment runs, at the same time, the first screw rod is driven to rotate by the existing driving equipment, the first screw rod drives the first sliding table to move, the first sliding table can preferentially touch a buffer stop block to avoid collision and reduce the impact degree, the second sliding rail is driven to transversely move in the moving process of the first sliding table, after the transverse position adjustment is finished, the driving device is electrified to drive the second screw rod to rotate, the second screw rod moves the second sliding table through a transmission ring in the rotating process so as to drive the pneumatic type clamping tool to longitudinally adjust the position, when a long plate moves to a dangerous position, an alarm stop block is triggered to alarm to forcibly stop the equipment, the working precision of the whole equipment can be effectively improved by the system cooperation of a double-shaft operating system, and the high-speed and accurate processing effect can be effectively achieved by the operation of a motor, and the cooperation baffle can be so that the low noise effect that itself has can reach more excellent degree, can carry out the biax operation, and electric power control system can effectual reduction staff's intensity of labour, sets up corresponding warning dog in addition and can increase substantially the security of whole device.

3. When the punching column lifts against the lifting seat to punch a material plate, generated steel scraps are blown to the side face of the baffle plate by the air blowing pipe and then fall into the inclined groove, the steel scraps enter the circular groove through the inclined groove, the steel scraps are rotated out by the thread ring on the surface of the connecting rod driven by the driving column and then uniformly enter the collecting box, and finally the steel scraps are collected in a centralized manner.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is a schematic perspective view of the assembled structure of the present invention.

Fig. 3 is a schematic structural diagram of a first sliding table according to the present invention.

Fig. 4 is a schematic structural diagram of a second sliding table according to the present invention.

Fig. 5 is a schematic structural view of the pneumatic clamping tool of the present invention.

FIG. 6 is a side cross-sectional schematic view of the table of the present invention.

FIG. 7 is a schematic structural diagram of a fully automatic cleaning assembly according to the present invention.

The reference signs are: 1. a work table; 2. a mounting seat; 3. a lifting seat; 4. a mounting frame; 5. a dual axis operating system; 6. a pneumatic clamping tool; 7. a full-automatic cleaning assembly; 11. an oblique square groove; 12. mounting grooves; 31. an air blowing pipe; 32. punching the column; 33. a baffle plate; 41. a frame body; 42. a protection plate; 51. a first slide rail; 52. a buffer stop block; 53. a first slide table; 54. a first screw; 55. a second slide rail; 56. a drive device; 57. an alarm stop block; 58. a second screw; 59. a drive ring; 510. a second sliding table; 511. a long plate; 512. positioning a plate; 61. a main clamping plate; 62. a main chuck; 63. a middle shaft plate; 64. a base plate; 65. a threaded hole; 66. a bolt; 67. a strip plate; 68. a cylinder; 69. a sphere; 610. an air tap; 71. a collection box; 72. mounting a column; 73. a drive column; 74. a connecting rod; 75. a threaded ring.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The full-automatic square pile end plate machining equipment comprises a workbench 1 and a mounting frame 4, wherein the mounting seat 2 is fixedly mounted on the top surface of the workbench 1, the lifting seat 3 is movably mounted on the front surface of the mounting seat 2, the double-shaft operating system 5 is movably mounted on the top surface of the mounting frame 4, the pneumatic type clamping tool 6 is movably mounted on the surface of the double-shaft operating system 5, and the full-automatic cleaning assembly 7 is movably mounted in the front of the workbench 1.

As shown in fig. 3 and fig. 4, a frame body 41 is fixedly mounted on the top surface of the mounting frame 4, two protection plates 42 are fixedly mounted at the front end and the rear end of the top surface of the mounting frame 4, the dual-axis operating system 5 includes a first slide rail 51, a buffer stop 52 is fixedly mounted on the top surface of the first slide rail 51, a first sliding table 53 is movably mounted on the surface of the first slide rail 51, a first screw 54 is mounted on the bottom of the first sliding table 53 through a thread, a second slide rail 55 is fixedly mounted on the top surface of the first sliding table 53, a driving device 56 is fixedly mounted at one end of the top surface of the second slide rail 55, a second screw 58 is fixedly connected to one end of the driving device 56, an alarm stop 57 is fixedly mounted on the top surface of the second slide rail 55, a driving ring 59 is mounted on the surface of the second screw 58, and a second sliding table 510 is fixedly mounted at the top end of the driving ring 59, the top fixed mounting of second sliding stand 510 has long board 511, the back fixed mounting of long board 511 right-hand member has locating plate 512, the top surface of long board 511 bottom sets up to dentate structure, the material of bump stop 52 sets up to resin material, the quantity of bump stop 52 is two, two bump stop 52 is fixed mounting respectively in the left and right sides of first slide rail 51, the one end of first screw rod 54 is rotated and is installed in the inside of guard plate 42, the fixed cover of the other end of first screw rod 54 has connect drive arrangement.

Specifically, before the equipment runs, air pressure operation is performed first, at this time, the existing driving equipment drives the first screw 54 to rotate, the first screw 54 drives the first sliding table 53 to move, the first sliding table 53 can preferentially touch the buffer stop block 52 to prevent collision and reduce the collision degree, the first sliding table 53 drives the second sliding rail 55 to move transversely in the moving process, after transverse position adjustment is finished, the driving device 56 is powered on at this time to drive the second screw 58 to rotate, the second screw 58 moves the second sliding table 510 through the transmission ring 59 in the rotating process, so as to drive the pneumatic clamping tool 6 to perform longitudinal position adjustment, after the long plate 511 moves to a dangerous position, the alarm stop block 57 is triggered to alarm, the equipment is forced to stop, and high-speed and accurate processing effect can be effectively achieved by matching with motor operation, and the cooperation baffle 33 can make the low noise effect that itself has can reach more excellent degree, utilizes the system cooperation of biax operating system 5 can effectual improvement whole equipment's work precision, can carry out the biax operation, sets up corresponding warning dog 57 in addition and can increase substantially the security of whole device.

As shown in fig. 5, the pneumatic clamping tool 6 includes a main plate 61, a circular hole is opened at one end of the main plate 61, a main chuck 62 is detachably installed at the bottom end of the circular hole, a middle shaft plate 63 is rotatably installed at the front surface of the main plate 61, a bottom plate 64 is fixedly installed at the bottom surface of the middle shaft plate 63, a threaded hole 65 is opened at the surface of the bottom plate 64, a bolt 66 is installed at the internal thread of the threaded hole 65, a long strip plate 67 is slidably installed at the surface of the bolt 66, a cylinder 68 is detachably installed at the front surface of the left end of the main plate 61, a sphere 69 is movably installed at the bottom end of the cylinder 68, an air nozzle 610 is fixedly communicated with the side surface of the cylinder 68, the number of the bolts 66 is four, four bolts 66 are equally divided into two groups, one group of bolts 66 is detachably installed at one side of the bottom plate 64, and the inner wall of the bottom plate 64 is fixedly installed at the side surface of the long strip plate 511, the fixed hose that has cup jointed in air cock 610's side, air cock 610 has pneumatic equipment through hose pneumatic connection, the bottom surface of main chuck 62 sets up to dentate structure, the shape of main chuck 62 and the shape looks adaptation of long board 511 bottom.

Specifically, after the object plate is aligned by the positioning plate 512, the existing pneumatic equipment is used to eject the cylinder 68 through the air nozzle 610, the cylinder 68 drives the left end of the main clamping plate 61 to rise after ejection, at this time, the main clamping head 62 at the right end clamps the object plate along with the descending of the right end, before the process, the long strip plate 67 can be adjusted according to the specification of the material plate, the bolt 66 is loosened, the long strip plate 67 is moved to a proper position, the position fixing can be completed by screwing the bolt 66, then the processing work of the material plate can be carried out by matching the double-shaft operating system 5 and the punching column 32, the pneumatic clamping tool 6 is matched with the adjustable strip plate 67, so that the overall clamping effect of the clamp is firmer, and the adaptability of the clamp can be improved, so that the clamp can process workpieces of various specifications, and the effect of improving the diversity of the equipment body is achieved.

As shown in fig. 6 and 7, the blowing pipe 31 is fixedly mounted on the left side of the bottom surface of the lifting seat 3, the punching column 32 is detachably mounted in the middle of the bottom surface of the lifting seat 3, the baffle 33 is fixedly mounted on the right side of the bottom surface of the lifting seat 3, the oblique square groove 11 is formed in the top surface of the workbench 1, the mounting groove 12 is formed in the front surface of the workbench 1, the full-automatic cleaning assembly 7 comprises a collecting box 71 and a driving column 73, the mounting column 72 is fixedly mounted on the side surface of the collecting box 71, the collecting box 71 is detachably mounted on the right side surface of the workbench 1 through the mounting column 72, a connecting rod 74 is fixedly mounted at one end of the driving column 73, a threaded ring 75 is fixedly mounted on the surface of the connecting rod 74, a circular groove is formed in the side surface of the workbench 1, the circular groove is mutually communicated with the oblique square groove 11, and the shape of the circular groove is matched with the threaded ring 75, the driving post 73 is detachably installed inside the installation groove 12.

It is specific, go up and down to carry out the punching press to the material board when punching press post 32 is facing to lift seat 3, the steel fillings of production can be blown to the side of baffle 33 by gas blow pipe 31, then fall into the inside of rhombus groove 11, inside entering into the circular slot through rhombus groove 11, the steel fillings can be rolled out by screw ring 75 on the connecting rod 74 surface that drive post 73 drove, then unified inside that enters into collection box 71, concentrate at last collect can, can carry out large-scale centralized processing to the steel fillings of production through mutually supporting of gas blow pipe 31 and full-automatic clearance subassembly 7, and all control by electric power, the holistic degree of automation of equipment has been improved, and gas blow pipe 31 is at the in-process of work, can effectually reduce the temperature on punching press post 32 surface, increase punching press post 32's life.

The working principle of the invention is as follows: the high-speed and accurate machining effect can be effectively achieved through the operation of the motor, the low-noise effect of the double-shaft operation system can be better achieved through the matching of the baffle 33, the working precision of the whole equipment can be effectively improved through the system matching of the double-shaft operation system 5, the double-shaft operation can be achieved, and in addition, the safety of the whole device can be greatly improved through the arrangement of the corresponding alarm stop block 57;

the pneumatic type clamping tool 6 is matched with the adjustable strip plate 67, so that the overall clamping effect of the clamp is firmer, the adaptability of the clamp can be improved, workpieces of various specifications can be processed, and the effect of improving the diversity of the equipment body is achieved;

can carry out large-scale centralized processing to the steel fillings that produce through mutually supporting of gas blow pipe 31 and full-automatic cleaning assembly 7, and all control by electric power, improve the holistic degree of automation of equipment, and gas blow pipe 31 is at the in-process of work, can effectual reduction punching press post 32 surperficial temperature, increase punching press post 32's life.

The points to be finally explained are: first, in the description of the present application, it should be noted that, unless otherwise specified and limited, the terms "mounted," "connected," "connecting," and "connecting" should be understood broadly, and may be a mechanical connection or an electrical connection, or a communication between two elements, and may be directly connected, and "upper," "lower," "left," and "right" are only used to indicate relative positional relationships, and when the absolute position of the object to be described is changed, the relative positional relationships may be changed;

secondly, the method comprises the following steps: in the drawings of the disclosed embodiments of the invention, only the structures related to the disclosed embodiments are referred to, other structures can refer to common designs, and the same embodiment and different embodiments of the invention can be combined with each other without conflict;

and finally: the above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that are within the spirit and principle of the present invention are intended to be included in the scope of the present invention.

Claims

1. The utility model provides a full-automatic square pile end plate processing equipment, includes workstation (1) and mounting bracket (4), its characterized in that, the top surface fixed mounting of workstation (1) has mount pad (2), the positive movable mounting of mount pad (2) has lift seat (3), the top surface movable mounting of mounting bracket (4) has biax operating system (5), the surface movable mounting of biax operating system (5) has pneumatic type centre gripping frock (6), workstation (1) positive inside movable mounting has full-automatic clearance subassembly (7).

2. The full-automatic square pile end plate machining equipment of claim 1, wherein: the top surface fixed mounting of mounting bracket (4) has support body (41), both ends fixed mounting has guard plate (42) around mounting bracket (4) top surface.

3. The full-automatic square pile end plate machining equipment of claim 1, wherein: biax operating system (5) include first slide rail (51), the top surface fixed mounting of first slide rail (51) has buffer stop (52), the movable surface mounting of first slide rail (51) has first sliding tray (53), first screw rod (54) are installed to the bottom screw thread of first sliding tray (53), the top surface fixed mounting of first sliding tray (53) has second slide rail (55), the one end fixed mounting of second slide rail (55) top surface has drive arrangement (56), the fixed cover of one end of drive arrangement (56) has cup jointed second screw rod (58), the top surface fixed mounting of second slide rail (55) has warning dog (57).

4. The full-automatic square pile end plate machining equipment of claim 3, wherein: the surface thread of second screw rod (58) installs driving ring (59), the top fixed mounting of driving ring (59) has second slip platform (510), the top fixed mounting of second slip platform (510) has long board (511), the back fixed mounting of long board (511) right-hand member has locating plate (512), the top surface of long board (511) bottom sets up to dentate structure.

5. The full-automatic square pile end plate machining equipment of claim 3, wherein: the material of bump stop (52) sets up to resin material, the quantity of bump stop (52) is two, two bump stop (52) fixed mounting is respectively in the left and right sides of first slide rail (51), the one end of first screw rod (54) is rotated and is installed in the inside of guard plate (42), the fixed cover of the other end of first screw rod (54) has connect drive arrangement.

6. The full-automatic square pile end plate machining equipment of claim 1, wherein: pneumatic type centre gripping frock (6) include main board (61), the round hole has been seted up to the one end of main board (61), the bottom demountable installation of round hole has main chuck (62), the front of main board (61) is rotated and is installed well axleboard (63), the bottom surface fixed mounting of well axleboard (63) has bottom plate (64), threaded hole (65) is seted up on the surface of bottom plate (64), bolt (66) are installed to the internal thread of threaded hole (65), the surface slidable mounting of bolt (66) has rectangular board (67), the front demountable installation of main board (61) left end has cylinder (68), the bottom movable mounting of cylinder (68) has spheroid (69), the fixed intercommunication in side of cylinder (68) has air cock (610).

7. The full-automatic square pile end plate machining equipment of claim 6, wherein: the quantity of bolt (66) is four, four bolt (66) etc. divide into two sets ofly, and is a set of bolt (66) demountable installation is in one side of bottom plate (64), the inner wall fixed mounting of bottom plate (64) is in the side of long board (511), the fixed hose that has cup jointed in side of air cock (610), air cock (610) has pneumatic equipment through hose pneumatic connection.

8. The full-automatic square pile end plate machining equipment of claim 6, wherein: the bottom surface of the main chuck (62) is provided with a toothed structure, and the shape of the main chuck (62) is matched with that of the bottom end of the long plate (511).

9. The full-automatic square pile end plate machining equipment according to claim 1, wherein: the utility model discloses a lifting seat, including lift seat (3), the left side fixed mounting of lift seat (3) bottom surface has gas blow pipe (31), the middle part demountable installation of lift seat (3) bottom surface has punching press post (32), the right side fixed mounting of lift seat (3) bottom surface has baffle (33), oblique square groove (11) have been seted up to the top surface of workstation (1), mounting groove (12) have been seted up in the front of workstation (1).

10. The full-automatic square pile end plate machining equipment of claim 1, wherein: full-automatic clearance subassembly (7) are including collecting box (71) and drive column (73), the side fixed mounting of collecting box (71) has erection column (72), collect box (71) and pass through erection column (72) demountable installation at the right side surface of workstation (1), the one end fixed mounting of drive column (73) has connecting rod (74), the fixed surface of connecting rod (74) installs threaded ring (75), the circular slot has been seted up to the side of workstation (1), the circular slot communicates with rhombus groove (11) each other, just the shape and the threaded ring (75) looks adaptation of circular slot, drive column (73) demountable installation is in the inside of mounting groove (12).