CN217200751U

CN217200751U - Automatic feeding and discharging equipment for hardware workpiece machining and surface treatment

Info

Publication number: CN217200751U
Application number: CN202221101680.2U
Authority: CN
Inventors: 杨树强
Original assignee: Cangzhou Quanyi Ultrasonic Equipment Co ltd
Current assignee: Cangzhou Quanyi Ultrasonic Equipment Co ltd
Priority date: 2022-05-09
Filing date: 2022-05-09
Publication date: 2022-08-16
Anticipated expiration: 2032-05-09

Abstract

The utility model discloses an automatic feeding and discharging equipment for hardware workpiece machining and surface treatment, which belongs to the field of hardware machining, and comprises a feeding and discharging device, a material warehouse device and a PLC (programmable logic controller), wherein the feeding and discharging device and the material warehouse device adopt a split structure, the PLC is arranged outside the material warehouse device, and driving parts of the feeding and discharging device and the material warehouse device are electrically connected with the PLC; the feeding and discharging device comprises two feeding and discharging assemblies, a first base, a driving assembly and a rotating assembly, wherein the first base is used for bearing the two feeding and discharging assemblies and the driving assembly, a protruding portion is integrally formed on the outer side of the first base, and the rotating assembly is arranged on the protruding portion. The utility model discloses an automatic unloading equipment of going up of hardware work piece processing and surface treatment has cost reduction and efficiency's advantage, has solved among the prior art problem that the material was extravagant, the quality is poor to process production manual work such as punching press, drilling, polishing, high frequency hardening.

Description

Automatic feeding and discharging equipment for hardware workpiece machining and surface treatment

Technical Field

The utility model belongs to the hardware processing field, concretely relates to unloading equipment in hardware work piece processing and surface treatment automation.

Background

In the manufacturing and production of industries such as casting workpieces, forging workpieces, hardware workpieces, chain wheels and gears, the loading and unloading are processes with large labor capacity and low automation degree. At present, a common production mode is that workpieces are manually held to be fed and discharged in the working procedures of stamping, drilling, polishing, high-frequency quenching and the like, the consistency of products is poor, the labor intensity of workers is high, and the production safety is low. Therefore, with the progress of technology and the continuous increase of labor cost, the market demand for automatic loading and unloading equipment is increasingly obvious. Meanwhile, higher requirements are put forward on the processing quality of the workpiece, such as raw material saving, product consistency, continuous processing capacity of equipment and the like. Therefore, how to improve the utilization rate and the automation degree of raw materials in the processes of stamping, drilling, polishing, high-frequency quenching and the like, improve the operation safety of the processes, reduce the labor input cost and improve the productivity becomes a technical problem to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

To the above defect of prior art or improve in the demand one or more, the utility model provides a unloader in hardware and hardware work piece processing and surface treatment are automatic has cost reduction and efficiency's advantage.

In order to achieve the purpose, the utility model provides an automatic loading and unloading equipment for hardware workpiece processing and surface treatment, which comprises an loading and unloading device, a material library device and a PLC (programmable logic controller), wherein the loading and unloading device and the material library device adopt a split structure, the PLC is arranged outside the material library device, and driving parts of the loading and unloading device and the material library device are electrically connected with the PLC;

the feeding and discharging device comprises two feeding and discharging assemblies, a first base, a driving assembly and a rotating assembly, wherein the first base is used for bearing the two feeding and discharging assemblies and the driving assembly, a protruding part is integrally formed on the outer side of the first base, and the rotating assembly is arranged on the protruding part;

the two feeding and discharging assemblies are arranged on the upper end face of the first base, the driving assembly is arranged on the first base and connected with the two feeding and discharging assemblies, and the rotating assembly is arranged on the protruding portion;

the material warehouse device comprises a rotary disc component, a lifting component and a second base, wherein the second base is used for bearing the rotary disc component and the lifting component, and the rotary disc component and the lifting component are arranged on the second base.

As a further improvement, go up the unloading subassembly and include a guide rail first, guide rail first detachable sets up in first base up end, the outside sliding connection of guide rail first has a slider first, slider first deviates from the fixed support that is equipped with of the one end of guide rail first, the external fixed surface of support is provided with a guide rail second, the outside sliding connection of guide rail second has a slider second, slider second deviates from the fixed sliding plate that is equipped with of the one end of guide rail second, the support is close to the fixed cylinder that is provided with of the one end of guide rail second just the output of cylinder extends to and is connected with the sliding plate, the one end that the cylinder was kept away from to the sliding plate is provided with a pneumatic jack catch.

As a further improvement, drive assembly includes a servo motor, servo motor detachable set up in the top of running through to first base is in the inside of first base and output, servo motor's the fixed synchronizing wheel first that is equipped with of output, drive assembly includes three synchronizing wheel axles, and is three synchronizing wheel axle set up in the up end of first base, one of them synchronizing wheel shaft outer peripheral face rotates and is connected with two synchronizing wheel second and two synchronizing wheel second piles up each other, two other synchronizing wheel shaft's the outside is rotated and is connected with a synchronizing wheel second, synchronizing wheel first and one of them between the synchronizing wheel second, three all connect through the first transmission of hold-in range between the synchronizing wheel second, it is three to be used for the transmission synchronizing wheel second hold-in range first and two the support is fixed mutually.

As a further improvement, rotating assembly includes a driving motor first, a first detachable of driving motor set up in the top of running through to the protruding portion of lower terminal surface and output of protruding portion, the output outside cover of driving motor first is equipped with a drive sprocket, rotating assembly still includes a fixed rotation axis first of locating the protruding portion up end, the outside of rotation axis first is rotated and is connected with a driven sprocket, driven sprocket with connect through chain drive between the drive sprocket.

As a further improvement of the utility model, the carousel subassembly includes a driving motor second, driving motor second is fixed to be located through the fixed bolster the inside of second base, the carousel subassembly still includes a rotation axis second, the rotatable setting of rotation axis second in the second base and one end extend to the up end of second base, rotation axis second is located the inside one end of second base and the output of driving motor second and all fixes and is equipped with a synchronizing wheel third, two connect through the transmission of synchronous belt second between the synchronizing wheel third, the fixed tray dish that is equipped with of up end of rotation axis second, the one end that rotation axis second was kept away from to the tray dish is provided with a plurality of guide post just the guide post is annular equidistance distribution on the tray dish.

As a further improvement of the utility model, the lifting component comprises a driving motor C which is fixedly arranged inside the second base through a fixed support, the lifting component also comprises a mounting rack which is arranged on the mounting rack on the upper end surface of the second base, a screw rod and a linear shaft are arranged outside the mounting rack, the screw rod is rotatably arranged inside the mounting rack, the outer sides of the screw rod and the linear shaft are both connected with a supporting plate in a sliding way, a nut in threaded connection with the screw rod and a linear bearing in sliding connection with the linear shaft are sequentially arranged on the supporting plate, a synchronous wheel T is arranged on the output end of the driving motor C and the lower end surface of the screw rod, two synchronous wheel Ts are connected through synchronous belt C transmission, the mounting rack is provided with an L-shaped extension part, a detection switch is fixedly arranged on the L-shaped extension part.

Generally, through the utility model above technical scheme who conceives compares with prior art, the beneficial effect who has includes:

the utility model discloses an automatic unloading equipment of going up of hardware and metals work piece processing and surface treatment, through two last unloading subassemblies that set up, drive assembly, rotating assembly, carousel subassembly and lifting unit, can the continuous action in process production such as punching press, drilling, polishing, high frequency hardening, do not need artificial supplementary can accomplish material loading, unloading automatically, promote treatment effeciency and degree of automation, promote the operational safety, reduce artifical input cost, save raw and other materials.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the loading and unloading assembly of the present invention;

fig. 3 is a schematic structural view of the driving assembly of the present invention;

FIG. 4 is a schematic structural view of the turntable assembly of the present invention;

fig. 5 is a schematic view of the lifting assembly of the present invention.

In all the figures, the same reference numerals denote the same features, in particular: 1. a loading and unloading device; 2. a stock bin device; 3. a feeding and discharging assembly; 31. a guide rail A; 32. a first sliding block; 33. a support; 34. a guide rail B; 35. a slide block B; 36. a sliding plate; 37. a cylinder; 38. a pneumatic jack catch; 4. a first base; 5. a drive assembly; 51. a servo motor; 52. a synchronous wheel A; 53. a synchronizing wheel shaft; 54. a synchronizing wheel B; 55. a synchronous belt A; 6. a rotating assembly; 61. driving a motor A; 62. a drive sprocket; 63. A rotating shaft A; 64. a driven sprocket; 65. a chain; 7. a turntable assembly; 71. driving a motor B; 72. A rotating shaft B; 73. a third synchronous wheel; 74. a synchronous belt B; 75. a tray; 76. a guide post; 8. a lifting assembly; 81. driving a motor C; 82. a mounting frame; 83. a screw rod; 84. a linear axis; 85. a piece supporting plate; 86. a nut; 87. a linear bearing; 88. d, synchronizing a wheel; 89. c, synchronous belt C; 810. a detection switch; 9. a second base; 10. a PLC controller.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.

As shown in the figure 1, an automatic feeding and discharging device for hardware workpiece machining and surface treatment comprises a feeding and discharging device 1, a material storage device 2 and a PLC (programmable logic controller) 10, wherein the feeding and discharging device 1 and the material storage device 2 are of a split structure, the feeding and discharging device 1 is movably installed on one side of the material storage device 2 according to working conditions of a production field, the PLC 10 is arranged on the outer side of the material storage device 2, and driving parts of the feeding and discharging device 1 and the material storage device 2 are electrically connected with the PLC 10.

In the embodiment, when the feeding and discharging device 1 works, the driving component 5 operates to drive the feeding and discharging component 3 to move to the position above the material warehouse device 2 to grab a workpiece, then the workpiece is continuously moved to the position above the rotating component 6 to put down the workpiece, meanwhile, the other feeding and discharging component 3 finishes the movement opposite to that of the feeding component under the driving of the driving component 5, and the workpiece is taken down from the rotating component 6 to move to a discharging station to finish a working cycle;

specifically, referring to fig. 2 and 3, the loading and unloading device 1 includes two loading and unloading assemblies 3, a first base 4, a driving assembly 5 and a rotating assembly 6, the first base 4 is used for carrying the two loading and unloading assemblies 3 and the driving assembly 5, a protruding portion 41 is integrally formed on the outer side of the first base 4, and the rotating assembly 6 is arranged on the protruding portion 41;

the two feeding and discharging assemblies 3 are arranged on the upper end face of the first base 4 and are used for feeding and discharging materials respectively, the driving assembly 5 is arranged on the first base 4 and is connected with the two feeding and discharging assemblies 3, and the rotating assembly 6 is arranged on the protruding portion 41;

more specifically, go up unloading subassembly 3 and include a guide rail first 31, guide rail first 31 detachable sets up in 4 up end of first base, the outside sliding connection of guide rail first 31 has a slider first 32, slider first 32 deviates from the fixed support 33 that is equipped with of one end of guide rail first 31, the external fixed surface of support 33 is provided with a guide rail second 34, the outside sliding connection of guide rail second 34 has a slider second 35, slider second 35 deviates from the fixed sliding plate 36 that is equipped with of one end of guide rail second 34, the fixed cylinder 37 that is provided with of one end that is close to guide rail second 34 of support 33 and the output of cylinder 37 extend to and are connected with sliding plate 36, the one end that cylinder 37 was kept away from to sliding plate 36 is provided with a pneumatic jack catch 38.

More specifically, the driving assembly 5 includes a servo motor 51, the servo motor 51 is detachably disposed inside the first base 4, the output end of the servo motor 51 penetrates through the upper side of the first base 4, a first synchronizing wheel 52 is fixedly disposed at the output end of the servo motor 51, the driving assembly 5 includes three synchronizing wheel shafts 53, the three synchronizing wheel shafts 53 are disposed on the upper end surface of the first base 4, the outer peripheral surface of one synchronizing wheel shaft 53 is rotatably connected with two second synchronizing wheels 54, the two second synchronizing wheels 54 are stacked on each other, the outer sides of the other two synchronizing wheel shafts 53 are rotatably connected with one second synchronizing wheel 54, the first synchronizing wheel 52 and the one second synchronizing wheel 54, and the three second synchronizing wheels 54 are in transmission connection through a first synchronizing belt 55, and the first synchronizing belt 55 for transmitting the three second synchronizing wheels 54 is fixed to the two supports 33.

More specifically, the rotating assembly 6 includes a driving motor case 61, the driving motor case 61 is detachably disposed on the lower end surface of the protruding portion 41, the output end of the driving motor case 61 penetrates through the protruding portion 41, a driving sprocket 62 is sleeved on the outer side of the output end of the driving motor case 61, the rotating assembly 6 further includes a rotating shaft case 63 fixedly disposed on the upper end surface of the protruding portion 41, a driven sprocket 64 is rotatably connected to the outer side of the rotating shaft case 63, and the driven sprocket 64 and the driving sprocket 62 are in transmission connection through a chain 65.

In this embodiment, the servo motor 51 can sequentially drive the two synchronous belts a 55, the plurality of synchronous wheels b 54 and the synchronous wheels a 52 to rotate when rotating, and since the bracket 33 is installed on the synchronous belts a 55, the sliding block a 32 is installed on the bracket 33, and the sliding block a 32 is in sliding fit with the guide rail a 31, the servo motor 51 is rotated to drive the feeding and discharging assembly 3 to move back and forth along the direction of the guide rail a 31. The air cylinder 37 pushes the sliding plate 36 to drive the sliding block B35 to move up and down along the guide rail B34, the pneumatic clamping jaws 38 are installed on the sliding plate 36, the sliding plate 36 and the support 33 are installed in a sliding fit mode through the guide rail B34 and the sliding block B35, therefore, the servo motor 51 and the air cylinder 37 work to enable the pneumatic clamping jaws 38 to complete grabbing of workpieces from the material warehouse device 2 and placing the workpieces on the rotating shaft A63, meanwhile, the pneumatic clamping jaws 38 completing the blanking assembly grab the workpieces from the rotating shaft A63 and move to a blanking station, and then quick feeding and blanking actions of the feeding and blanking device 1 are achieved.

Specifically, referring to fig. 4 and 5, the magazine apparatus 2 includes a turntable assembly 7, a lifting assembly 8, and a second base 9, the second base 9 is used for carrying the turntable assembly 7 and the lifting assembly 8, and both the turntable assembly 7 and the lifting assembly 8 are disposed on the second base 9.

More specifically, the turntable assembly 7 includes a driving motor b 71, the driving motor b 71 is fixedly disposed inside the second base 9 through a fixing support, the turntable assembly 7 further includes a rotating shaft b 72, the rotating shaft b 72 is rotatably disposed in the second base 9 and has one end extending to the upper end face of the second base 9, a synchronizing wheel c 73 is fixedly disposed at one end of the rotating shaft b 72 located inside the second base 9 and at the output end of the driving motor b 71, the two synchronizing wheel c 73 are connected through a synchronizing belt b 74 in a transmission manner, a supporting plate 75 is fixedly disposed at the upper end face of the rotating shaft b 72, one end of the supporting plate 75 far away from the rotating shaft b 72 is provided with a plurality of guide posts 76, and the guide posts 76 are annularly and equidistantly distributed on the supporting plate 75.

More specifically, the lifting assembly 8 includes a driving motor third 81, the driving motor third 81 is fixedly arranged inside the second base 9 through a fixing support, the lifting assembly 8 further includes a mounting frame 82, the mounting frame 82 is arranged on the mounting frame 82 on the upper end surface of the second base 9, a lead screw 83 and a linear shaft 84 are arranged on the outer side of the mounting frame 82, the lead screw 83 is rotatably arranged inside the mounting frame 82, the outer sides of the lead screw 83 and the linear shaft 84 are both slidably connected with a supporting plate 85, a screw 86 in threaded connection with the lead screw 83 and a linear bearing 87 in slidable connection with the linear shaft 84 are sequentially arranged on the supporting plate 85, a synchronizing wheel third 88 is arranged on the output end of the driving motor third 81 and the lower end surface of the lead screw 83, the two synchronizing wheel third 88 are in transmission connection through a synchronizing wheel third 89, the mounting frame 82 has an L-shaped extension portion, and a detection switch 810 is fixedly arranged on the L-shaped extension portion.

In the embodiment, after the detection switch 810 detects that the workpiece at the uppermost part is taken away by the pneumatic claw 38, the driving motor C81 rotates to drive the two synchronous wheel nuts 88 and the synchronous wheel nut 89 to rotate simultaneously, because one synchronous wheel nut 88 is arranged on the screw rod 83, the screw rod 83 and the linear shaft 84 are respectively arranged on the mounting frame 82, and the supporting piece plate 85 is arranged on the screw nut 86 and the linear bearing 87; the linear bearing 87 is in sliding fit with the linear shaft 84, so that the driving motor 81 rotates to indirectly drive the supporting plate 85 to lift and support the workpiece to move upwards. The detection switch 810 detects that the workpiece in-position driving motor 81 stops rotating to complete a workpiece lifting action. After a group of workpieces in the guide post 76 are grabbed, the driving motor B71 works to drive the rotating shaft B72 to rotate through the two synchronous wheels C73 and the synchronous belt B74, and the supporting piece disc 75 is installed on the rotating shaft B72, so that the driving motor B71 works to drive the supporting piece disc 75 to rotate to complete the rotation of the next group of workpieces to the feeding station.

The working principle is as follows:

firstly, when one of the feeding and discharging assemblies 3 works, a plurality of workpieces are manually placed on the turntable assembly 7, the lifting assembly 8 conveys the workpieces to a feeding station, the driving assembly 5 operates to drive the feeding and discharging assembly 3 to move to the position above the material warehouse device 2 to grab the workpieces, then the driving assembly continues to move to the position above the rotating assembly 6 to put down the workpieces, meanwhile, the other feeding and discharging assembly 3 completes the movement opposite to that of the feeding assembly under the driving of the driving assembly 5, and the workpieces are taken down from the rotating assembly 6 to move to a discharging station to complete one working cycle. Wherein, PLC controller 10 is to course of working real time control to PLC controller 10 can realize the most ideal working effect through the parameter setting on the touch-sensitive screen, has replaced artificial processing action, can not only save a large amount of manual works and drop into, has promoted the product uniformity moreover by a wide margin.

The utility model discloses an automated production can accomplish the operation in the process production such as punching press, drilling, polishing, high frequency quenching with high efficiency, and simultaneously, this device area is less, and manufacturing cost is lower, has certain using value widely.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The automatic loading and unloading equipment for hardware workpiece machining and surface treatment is characterized by comprising a loading and unloading device (1), a material warehouse device (2) and a PLC (programmable logic controller) controller (10), wherein the loading and unloading device (1) and the material warehouse device (2) adopt split structures, the PLC controller (10) is arranged on the outer side of the material warehouse device (2), and driving parts of the loading and unloading device (1) and the material warehouse device (2) are electrically connected with the PLC controller (10);

the feeding and discharging device (1) comprises two feeding and discharging assemblies (3), a first base (4), a driving assembly (5) and a rotating assembly (6), the first base (4) is used for bearing the two feeding and discharging assemblies (3) and the driving assembly (5), a protruding part (41) is integrally formed on the outer side of the first base (4), and the rotating assembly (6) is arranged on the protruding part (41);

the two feeding and discharging assemblies (3) are arranged on the upper end face of a first base (4), the driving assembly (5) is arranged on the first base (4) and connected with the two feeding and discharging assemblies (3), and the rotating assembly (6) is arranged on a protruding part (41);

the material warehouse device (2) comprises a rotary disc component (7), a lifting component (8) and a second base (9), the second base (9) is used for bearing the rotary disc component (7) and the lifting component (8), and the rotary disc component (7) and the lifting component (8) are arranged on the second base (9).

2. The automatic loading and unloading device for hardware workpiece machining and surface treatment according to claim 1, wherein the loading and unloading assembly (3) comprises a guide rail A (31), the guide rail A (31) is detachably arranged on the upper end surface of the first base (4), a slide block A (32) is slidably connected to the outer side of the guide rail A (31), a support (33) is fixedly arranged at one end of the slide block A (32) departing from the guide rail A (31), a guide rail B (34) is fixedly arranged on the outer surface of the support (33), a slide block B (35) is slidably connected to the outer side of the guide rail B (34), a slide plate (36) is fixedly arranged at one end of the slide block B (35) departing from the guide rail B (34), an air cylinder (37) is fixedly arranged at one end of the support (33) close to the guide rail B (34), and the output end of the air cylinder (37) extends to be connected with the slide plate (36), the end of the sliding plate (36) far away from the air cylinder (37) is provided with a pneumatic claw (38).

3. The automatic loading and unloading device for hardware workpiece machining and surface treatment according to claim 2, wherein the driving assembly (5) comprises a servo motor (51), the servo motor (51) is detachably arranged inside the first base (4), the output end of the servo motor (51) penetrates through the first base (4), a first synchronizing wheel (52) is fixedly arranged at the output end of the servo motor (51), the driving assembly (5) comprises three synchronizing wheel shafts (53), the three synchronizing wheel shafts (53) are arranged on the upper end surface of the first base (4), two second synchronizing wheels (54) are rotatably connected to the outer peripheral surface of one of the synchronizing wheel shafts (53), the two second synchronizing wheels (54) are stacked, a second synchronizing wheel (54) is rotatably connected to the outer sides of the other two synchronizing wheel shafts (53), and a space between the first synchronizing wheel (52) and one of the second synchronizing wheels (54), All connect through hold-in range first (55) transmission between the third synchronizing wheel second (54), be used for the transmission three hold-in range first (55) and two of synchronizing wheel second (54) are fixed mutually support (33).

4. The automatic unloading equipment of going up of hardware and workpiece processing and surface treatment of claim 1, characterized in that, rotating assembly (6) include a driving motor first (61), driving motor first (61) detachable set up in the top of protruding portion (41) is run through to the lower terminal surface and the output of protruding portion (41), the output outside cover of driving motor first (61) is equipped with a drive sprocket (62), rotating assembly (6) still include a fixed rotation axis first (63) of locating protruding portion (41) up end, the outside of rotation axis first (63) is rotated and is connected with a driven sprocket (64), driven sprocket (64) with connect through chain (65) transmission between drive sprocket (62).

5. The automatic loading and unloading equipment of hardware workpiece processing and surface treatment of claim 1, characterized in that, carousel subassembly (7) includes a driving motor second (71), driving motor second (71) is fixed to be located through the fixed bolster in the inside of second base (9), carousel subassembly (7) still includes a rotation axis second (72), rotation axis second (72) rotatable set up in second base (9) and one end extend to the up end of second base (9), rotation axis second (72) are located the inside one end of second base (9) and the output of driving motor second (71) and all are fixed and are equipped with a synchronizing wheel third (73), two between synchronizing wheel third (73) through synchronous belt second (74) transmission connection, the up end of rotation axis second (72) is fixed and is equipped with a tray (75), a plurality of guide posts (76) are arranged at one end, far away from the rotating shaft B (72), of the supporting piece disc (75), and the guide posts (76) are distributed on the supporting piece disc (75) in an annular shape at equal intervals.

6. The automatic loading and unloading device for hardware workpiece machining and surface treatment according to claim 1, wherein the lifting assembly (8) comprises a driving motor C (81), the driving motor C (81) is fixedly arranged inside the second base (9) through a fixing support, the lifting assembly (8) further comprises a mounting frame (82), the mounting frame (82) is arranged on the mounting frame (82) on the upper end surface of the second base (9), a screw rod (83) and a linear shaft (84) are arranged on the outer side of the mounting frame (82), the screw rod (83) is rotatably arranged inside the mounting frame (82), the outer sides of the screw rod (83) and the linear shaft (84) are both in sliding connection with a support plate (85), a screw nut (86) in threaded connection with the screw rod (83) and a linear bearing (87) in sliding connection with the linear shaft (84) are sequentially arranged on the support plate (85), the output of driving motor third (81) and the lower terminal surface of lead screw (83) all are provided with a synchronizing wheel butyl (88), two connect through the synchronous belt third (89) transmission between synchronizing wheel butyl (88), mounting bracket (82) have an L type extension, fixed detection switch (810) that is equipped with on the L type extension.