CN110834201A

CN110834201A - Novel word bending machine

Info

Publication number: CN110834201A
Application number: CN202010029473.XA
Authority: CN
Inventors: 李龙亭; 康瑞民
Original assignee: Weifang Dachuang Cnc Equipment Co Ltd
Current assignee: Weifang Dachuang Cnc Equipment Co Ltd
Priority date: 2020-01-13
Filing date: 2020-01-13
Publication date: 2020-02-25
Anticipated expiration: 2040-01-13
Also published as: CN110834201B

Abstract

The invention provides a novel bending machine which comprises a workbench, wherein a cutting and feeding device, a cutting device, a bending and feeding device and a bending device are sequentially arranged on the workbench, the cutting and feeding device comprises a conveying top plate and a conveying bottom plate, the conveying top plate is connected with the conveying bottom plate through a plurality of supporting columns, the conveying bottom plate is arranged on the workbench, a limiting track is arranged on the supporting columns between the conveying bottom plate and the conveying top plate, a vertically arranged conveying roller for conveying plates is arranged on the limiting track, and the discharge end of the limiting track is arranged in a manner of being clung to; the bending and feeding device comprises a feeding top plate and a feeding bottom plate, a limiting driving roller and a limiting driven roller are arranged between the feeding top plate and the feeding bottom plate, a gap for passing through a plate is formed between the limiting driving roller and the limiting driven roller, a mounting plate is arranged on one side of the feeding top plate and one side of the feeding bottom plate, and an adjusting part is arranged on the mounting plate. The invention realizes the adaptation to different types of plates, can completely return the materials when the plates return the materials, reduces the occurrence of creases and achieves better effect of bending and enclosing characters.

Description

Novel word bending machine

Technical Field

The invention relates to a novel bending machine for bending an aluminum profile.

Background

The three-dimensional luminous characters are common forms used by merchants for advertising, have the advantages of attractive appearance, high grade and low cost, and therefore become the first choice for the merchants to advertise in recent years. The main work for manufacturing the three-dimensional luminous character edge is the surrounding edge which mainly comprises folding edges and bending. The traditional bending machine is made by hand, the quality of the surrounding characters is difficult to ensure, and the efficiency is low, so the traditional bending machine is gradually replaced by a character bending machine. The bending machine comprises a feeding device, a cutting device, a bending device and the like, and the feeding device of the existing three-dimensional luminous character bending machine has the following defects: firstly, the center of the plate and the center of the clamping device cannot coincide during feeding, so that the clamping effect is influenced, secondly, because the plate is thin, the plate is easy to have creases when the bending of the plate is finished and the material needs to be returned, and the creases of the plate influence the clamping of the plate, so that errors can also occur in the cutting of the plate during clamping, and the plate with the creases needs to be repaired manually, so that manpower and material resources are wasted; thirdly, the assembly of the existing bending machine needs the complete machine assembly, which increases the labor intensity, and the matching of all mechanisms can cause errors due to the complete machine assembly, thereby influencing the processing of the plate.

Disclosure of Invention

The technical problem to be solved by the invention is to provide a novel character bending machine, which is suitable for different types of plates, can completely return materials when the plates return materials, reduces the occurrence of creases, achieves better effect of bending and enclosing characters, and facilitates the modular assembly and subsequent maintenance of the character bending machine.

In order to solve the technical problem, the cutting and feeding device comprises a workbench, wherein the workbench is sequentially provided with a cutting and feeding device, a cutting device, a bending and feeding device and a bending device, and the cutting and feeding device is characterized in that: the cutting and feeding device comprises a plurality of supporting columns arranged on a supporting plate, the top of each supporting column is connected with a conveying top plate, a limiting track adaptive to the height of a plate is arranged on each supporting column between the supporting plate and the conveying top plate, a conveying roller which is vertically arranged and penetrates through the limiting track is arranged between the conveying top plate and the supporting plate, and the discharge end of the limiting track is arranged in a manner of being tightly attached to the cutting device; the bending and feeding device comprises a feeding top plate, a limiting driving roller and a limiting driven roller are arranged between the feeding top plate and the supporting plate, a gap for passing through plates is formed between the limiting driving roller and the limiting driven roller, a mounting plate is arranged on one side of the feeding top plate and one side of the feeding bottom plate, and an adjusting part capable of adjusting the gap between the limiting driving roller and the limiting driven roller is arranged on the mounting plate.

After the structure is adopted, the upper height and the lower height of the limiting track are required to be adjusted to adapt to plates with different widths before the plates are conveyed, the conveying rollers can provide power for conveying the plates, the plates are conveyed through relative rotation extrusion among the conveying rollers, pushing among the plates is reduced, and creases are prevented from appearing on the plates; the distance between the inner sides of the conveying bottom plate and the conveying top plate is the width of the maximum plate, the supporting columns provide connecting support for the conveying bottom plate and the conveying top plate on one hand, and meanwhile, the distance between the conveying bottom plate and the conveying top plate can be adjusted on the supporting columns according to the actual width of the plate, so that the position of the plate can be limited when the plate is conveyed, and the stability of plate conveying is ensured; spacing drive roll and spacing driven voller can provide power for panel after the cutting, and the transport of having avoided the conveying roller causes panel crease to appear, and the spacing driven voller can be adjusted to the adjusting part after panel buckles simultaneously and keep away from spacing drive roll, and when the material returned, spacing drive roll can't provide power for the material returned of panel, has reduced cutting feed arrangement and, buckle the panel between the feed arrangement and appear the crease influence production quality's emergence. Because be equipped with cutting feed arrangement, cutting device, buckle feed arrangement and the device of buckling in proper order on above-mentioned workstation, when the equipment of bending the word machine, can realize the modularization equipment, reduced the equipment degree of difficulty and artifical installation cost.

The limiting rail comprises an upper base and a lower base, rails matched with the plates are arranged on the inner sides of the upper base and the lower base, guide holes used for penetrating through the support columns are formed in the upper base and the lower base, the conveying rollers are inserted into the middle positions of the upper base and the lower base, and the rails are symmetrically arranged on two sides of the conveying rollers.

Cutting device includes fixture and cutting mechanism, set up the through-hole that is used for wearing out cutting mechanism on the workstation, cutting mechanism includes milling cutter and rotates the cutter arbor that is connected with milling cutter, cutter arbor sliding connection is on the adjustment seat, be equipped with the perpendicular adjustment part that is used for adjusting the cutter arbor straightness that hangs down on the adjustment seat, and be used for adjusting the depth adjustment part of cutter arbor and panel interval.

The center of support column and cutting device's fixture's center is in same horizontal plane, evenly be equipped with the scale from the center upwards downwards on the support column, go up the base with the fastening part that is used for fixing in the support column position is all installed to the base down.

Fixture is including establishing parallel arrangement's on the workstation main part fixed plate, the rear end of main part fixed plate is equipped with the fastening fixed plate, the main part fixed plate with the equal fixed mounting of fastening fixed plate in the backup pad, the uncovered setting of front end of fixed plate, slidable mounting has the connecting plate between the main part fixed plate, the outer end of connecting plate is equipped with the power fixed plate near the fastening fixed plate, the outer end of fixed plate is equipped with the centre gripping back plate, and the periphery of power fixed plate evenly is equipped with power component, power component power is connected with the centre gripping front bezel, and the centre gripping front bezel is in the outside of centre gripping back plate and constitutes the clearance for centre gripping panel between centre gripping front bezel and the centre gripping back plate, be equipped with the adjusting bolt of distance between adjustment power fixed plate and the.

The conveying roller comprises a driving conveying roller and a driven conveying roller, the lower end of the driving conveying roller penetrates out of the lower bottom plate and is connected with a power device through a belt, and the upper end of the driving conveying roller penetrates out of the conveying top plate.

The upper end of the limiting driving roller penetrating out of the feeding top plate is connected with the upper end of the driving conveying roller through a belt.

The adjusting component is an air cylinder which is symmetrically arranged on the mounting plate from top to bottom, and a piston rod of the air cylinder penetrates through the mounting plate to be connected with a mounting seat of the limiting driven roller.

The bending device comprises an upper plate and a lower plate which are arranged in parallel, a vertical plate is arranged between the upper plate and the lower plate, a bending mechanism is arranged between the upper plate and the lower plate and on one side of the vertical plate, and a bending motor for driving the bending mechanism to bend is arranged on the lower portion of the lower plate.

In conclusion, the invention realizes the adaptation to different types of plates, reduces the occurrence of creases when the plates are returned, achieves better bending and word surrounding effects, and simultaneously reduces the manual assembly difficulty and cost.

Drawings

The invention is further illustrated by the following examples in conjunction with the accompanying drawings:

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

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is a schematic structural view of the cutting mechanism of FIG. 1;

FIG. 4 is a schematic structural view of the clamping mechanism of FIG. 1;

FIG. 5 is a schematic structural view of the bending apparatus of FIG. 1;

in the figure: 1-cutting feed device, 101-top conveying plate, 102-supporting plate, 103-supporting column, 104-limiting track, 105-conveying roller, 106-upper base, 107-lower base, 108-driving conveying roller, 109-driven conveying roller, 2-cutting device, 201-milling cutter, 202-cutter bar, 203-adjusting base, 204-through hole, 205-main body fixing plate, 206-fastening fixing plate, 207-connecting plate, 208-power fixing plate, 209-clamping rear plate, 210-power part, 211-clamping front plate, 3-bending feed device, 301-top feeding plate, 302-bottom feeding plate, 303-limiting driving roller, 304-limiting driven roller, 305-cylinder, 4-bending device, 401-upper plate, 402-lower plate, 403-vertical plate, 404-arc bending motor, 405-rotor, 406-stator, 407-rotor, 408-positioning plate, 409-stator thimble and 410-copper shaft.

Detailed Description

Referring to fig. 1, this novel word bending machine includes the workstation, is equipped with cutting feed arrangement 1, cutting device 2 in proper order on the workstation, buckles feed arrangement 3 and buckle device 4, evenly be equipped with a plurality of erection columns along length direction on the workstation, cutting feed arrangement 1, cutting device 2, buckle feed arrangement 3 and buckle device 4 all correspond install in on the erection column.

Referring to fig. 1 and 2, the cutting and feeding device 1 comprises a conveying top plate 101 and a conveying bottom plate 102, wherein the conveying top plate 101 and the conveying bottom plate 102 are connected through a plurality of supporting columns 103, the conveying bottom plate 102 is arranged at the top end of an installation column, a limiting rail 104 which is suitable for the width of a plate is arranged on the supporting column 103 between the conveying bottom plate 102 and the conveying top plate 101, a conveying roller 105 which is vertically arranged and used for conveying the plate is arranged on the limiting rail 104, and the discharge end of the limiting rail 104 is arranged in a manner of being; spacing track 104 includes upper base 106 and lower base 107, is equipped with on the relative inboard of upper base 106 and lower base 107 with panel complex track, all offers the guiding hole 4 that is used for passing support column 103 on upper base 106 and the lower base 107, and conveying roller 105 cartridge is on the intermediate position of upper base 106 and lower base 107, and the track symmetry locates conveying roller 105's both sides. The conveying roller 105 comprises a driving conveying roller 108 and a driven conveying roller 109, the lower end of the driving conveying roller 108 penetrates out of the lower bottom plate and is connected with a power device through a belt, and the upper end of the driving conveying roller 108 penetrates out of the conveying top plate 101.

Referring to fig. 3, the cutting device 2 includes a clamping mechanism and a cutting mechanism, a through hole 204 is provided on the worktable for penetrating through the cutting mechanism, the cutting mechanism includes a milling cutter 201 and a cutter bar 202 rotatably connected to the milling cutter 201, the cutter bar 202 is slidably connected to an adjusting seat 203, and a vertical adjusting component for adjusting the verticality of the cutter bar 202 and a depth adjusting component for adjusting the distance between the cutter bar 202 and the plate are provided on the adjusting seat 203. Through perpendicular guiding mechanism, thereby can adjust the straightness that hangs down of cutter arbor 202 to adjust the straightness that hangs down of milling cutter 201, on the good basis of the straightness that hangs down adjustment, through depth guiding mechanism, thereby can adjust the interval between cutter arbor 202 and the panel and adjust the interval between milling cutter 201 and the panel, reached the technical effect of adjustment milling cutter 201 cutting depth and straightness that hangs down, improved the high efficiency and the adjustability of panel cutting. The center of support column 103 and cutting device 2's fixture's center are in same horizontal plane, evenly be equipped with the scale from the center upwards downwards on the support column 103, go up base 106 and lower base 107 and all install the fastening part that is used for fixing in support column 103 position, be equipped with the scale on the support column 103 and can adjust the position of going up base 106 and lower base 107 according to the scale to the width according to panel is adjusted sooner, has improved work efficiency. Referring to fig. 4, the clamping mechanism includes a main body fixing plate 205 arranged on the workbench in parallel, a fastening fixing plate 206 is arranged at the rear end of the main body fixing plate 205, the main body fixing plate 205 and the fastening fixing plate 206 are both fixedly mounted on the mounting column, the front end of the fixing plate is arranged in an open manner, a connecting plate 207 is slidably mounted between the main body fixing plates 205, a power fixing plate 208 close to the fastening fixing plate 206 is arranged at the outer end of the connecting plate 207, a clamping rear plate 209 is arranged at the outer end of the fixing plate, power components 210 are evenly arranged on the periphery of the power fixing plate 208, the power components 210 are dynamically connected with a clamping front plate 211, the clamping front plate 211 is located outside the clamping rear plate 209, a gap for clamping the plate is formed between the clamping front plate 211 and the clamping rear plate 209, and an adjusting bolt for. When the device is used, firstly, the perpendicularity between the clamping rear plate 209 and the workbench needs to be adjusted, after the adjustment is completed, the perpendicularity bolt on the clamping rear plate 209 cannot be adjusted, then, the front and back positions of the clamping front plate 211 and the clamping rear plate 209 are adjusted, the adjustment is performed according to the position of a cutting knife penetrating through the workbench, and the position of the whole formed by the power fixing plate 208 and the connecting plate 207 on the main body fixing plate 205 is adjusted by adjusting an adjusting part, namely, rotating the adjusting bolt or rotating a rotating motor; because the power component 210 is located at the center of the power fixing plate 208, when a plate is clamped, especially some plates with different thicknesses up and down are fixed relative to the periphery of the plate, the verticality of the clamped plate is ensured, and the depth error of the cutting knife when the plate is cut is reduced.

Referring to fig. 1 and 2, the bending and feeding device 3 includes a feeding top plate 301 and a feeding bottom plate 302, the feeding bottom plate 302 is disposed on the mounting column, a limiting driving roller 303 and a limiting driven roller 304 are disposed between the feeding top plate 301 and the feeding bottom plate 302, a gap for passing through the plate is formed between the limiting driving roller 303 and the limiting driven roller 304, a mounting plate is disposed on one side of the feeding top plate 301 and one side of the feeding bottom plate 302, and an adjusting member for adjusting the gap between the limiting driving roller 303 and the limiting driven roller 304 is disposed on the mounting plate. The adjusting component is an air cylinder 305 which is arranged on the mounting plate in an up-down symmetrical mode, and a piston rod of the air cylinder 305 penetrates through the mounting plate to be connected with a mounting seat of the limiting driven roller 304. The upper end of the limiting driving roller 303 penetrating out of the feeding top plate 301 is connected with the upper end of the driving conveying roller 108 through a belt. When in use, the utility model can be used for cleaning the surface of the human body. Spacing drive roll 303 and spacing driven voller 304 can provide power again for the transport of panel, reduce and carry the distance overlength to cause the crease to appear in panel, when the material returned, the clearance grow between spacing drive roll 303 and the spacing driven voller 304 through the regulation of cylinder 305, can not prevent unloading of panel, or avoid providing power for unloading of panel, reduce the crease to appear in the panel between bending feed arrangement 3 and cutting feed arrangement 1.

Referring to fig. 5, the bending apparatus 4 includes an upper plate 401 and a lower plate 402 disposed in parallel, the lower plate 402 is disposed on the upper end of the mounting post, an upright plate 403 is disposed between the upper plate 401 and the lower plate 402, a bending mechanism is disposed between the upper plate 401 and the lower plate 402 and on one side of the upright plate 403, and a bending motor 404 for driving the bending mechanism to bend is disposed on the lower portion of the lower plate 402. The bending mechanism comprises a rotor, a curved arc motor 404 is in power connection with the rotor, a coaxially arranged stator 406 is inserted in the rotor, the upper end of the stator 406 is connected with an upper plate 401, a plurality of positioning pieces 408 are arranged on the side walls of the stator 406 and the rotor at intervals along the axial direction, a stator thimble 409 penetrating through the positioning pieces 408 is arranged in the axial direction of the stator 406 in a penetrating mode, a rotor thimble penetrating through the positioning pieces 408 is arranged in the axial direction of the rotor in a penetrating mode, the axial distance between every two adjacent stator thimbles 409 is smaller than that between every two adjacent rotor thimbles, a plurality of copper shafts 410 are sleeved on the stator thimble 409 and the rotor thimble, a copper shaft 410 is sleeved on the stator thimble 409 and the rotor thimble between every two adjacent positioning pieces 408, and a gap used for passing through a plate is arranged between the copper shaft 410 sleeved on. Plate is getting into the clearance between the copper axle 410, then drive the rotor through control arc bending motor 404 and rotate, because stator 406 is fixed, the rotation of rotor can make plate crooked, thereby reach the technical effect of buckling, adapt to different plate arc, simultaneously because the setting of stator thimble 409 and rotor thimble, can adjust according to the model of the plate of buckling, a plurality of copper axles 410 can accurately be adjusted according to the plate model, the setting of spacer 408 can increase the bending resistance of stator thimble 409 and rotor thimble, become the segmentation atress by original whole root atress, the stability of stator thimble 409 and rotor thimble has been increased, simultaneously because the demountable installation of rotor has increased the life of device. Because the coaxial line of stator and rotor sets up, reduced the debugging degree of difficulty, guaranteed that the radius table of the device of buckling is unanimous basically, only need the workman to carry out simple debugging, need not carry out the one-to-one setting according to the condition of on-the-spot buckling, improved work efficiency, reduced the work degree of difficulty.

Before the plates are conveyed, the upper height and the lower height of the limiting rail 104 need to be adjusted so as to adapt to the plates with different widths, the conveying rollers 105 can provide power for conveying the plates, the plates are conveyed through relative rotation extrusion between the conveying rollers 105, pushing between the plates is reduced, and the plates are prevented from being folded; the distance between the inner sides of the conveying bottom plate 102 and the conveying top plate 101 is the width of the maximum plate, the supporting column 103 provides a connecting support for the conveying bottom plate 102 and the conveying top plate 101 on one hand, and meanwhile, the distance between the conveying bottom plate 102 and the conveying top plate 101 can be adjusted on the supporting column 103 according to the actual width of the plate, so that the position of the plate can be limited when the plate is conveyed, and the stability of plate conveying is ensured; spacing drive roller 303 and spacing driven voller 304 can provide power for panel after the cutting, have avoided conveying of conveying roller 105 to cause panel crease to appear, and the adjustment part can adjust spacing driven voller 304 and keep away from spacing drive roller 303 after panel buckles simultaneously, and when the material returned, spacing drive roller 303 can't provide power for the material returned of panel, has reduced cutting feed arrangement 1 and, the panel between the feed arrangement 3 of buckling and has appeared the crease and influence production quality's emergence. Because on the equal erection column of cutting feed arrangement, cutting device, the feed arrangement of buckling and the device of buckling that is equipped with in proper order in the backup pad of above-mentioned workstation, when the equipment of bending the word machine, can realize the modularization equipment, reduced the equipment degree of difficulty and artifical installation cost, can carry out the independent dismantlement of every device on follow-up maintenance, increased life.

Claims

1. The utility model provides a novel word bending machine, includes the workstation, be equipped with cutting feed arrangement (1), cutting device (2), buckle feed arrangement (3) and buckle device (4) on the workstation in proper order, its characterized in that: the cutting and feeding device comprises a workbench, and is characterized in that a plurality of mounting columns are uniformly arranged on the workbench along the length direction, a cutting and feeding device (1), a cutting device (2), a bending and feeding device (3) and a bending device (4) are correspondingly mounted on the mounting columns, the cutting and feeding device (1) comprises a conveying top plate (101) connected through a plurality of supporting columns (103) and a conveying bottom plate (102) arranged on the workbench, the conveying bottom plate (102) is arranged on the end part of each mounting column, a limiting track (104) adaptive to the height of a plate is arranged on the supporting column (103) between the supporting plate (102) and the conveying top plate (101), a conveying roller (105) which is vertically arranged and penetrates through the limiting track (104) is arranged between the conveying top plate (101) and the supporting plate (102), and the discharge end of the limiting track (104) is tightly attached to; bending feeding device (3) comprises a feeding top plate (301) and a feeding bottom plate (302), wherein the feeding top plate (301) and a limiting driving roller (303) and a limiting driven roller (304) are arranged between the feeding bottom plate (302), a gap for passing through a plate is formed between the limiting driving roller (303) and the limiting driven roller (304), the feeding top plate (301) and one side of the feeding bottom plate (302) are provided with a mounting plate, and an adjusting part for adjusting the gap between the limiting driving roller (303) and the limiting driven roller (304) is arranged on the mounting plate.

2. The new character bender as claimed in claim 1, wherein: the limiting track (104) comprises an upper base (106) and a lower base (107), tracks matched with plates are arranged on the opposite inner sides of the upper base (106) and the lower base (107), guide holes used for penetrating through the supporting columns (103) are formed in the upper base (106) and the lower base (107), the conveying rollers (105) are inserted in the middle positions of the upper base (106) and the lower base (107), and the tracks are symmetrically arranged on the two sides of the conveying rollers (105).

3. The new character bender as claimed in claim 2, wherein: cutting device (2) include fixture and cutting mechanism, offer through-hole (204) that are used for wearing out cutting mechanism on the workstation, cutting mechanism includes milling cutter (201) and rotates cutter arbor (202) that are connected with milling cutter (201), cutter arbor (202) sliding connection is on adjustment seat (203), be equipped with the perpendicular adjustment part that is used for adjusting cutter arbor (202) straightness that hangs down on adjustment seat (203), and be used for adjusting the depth adjustment part of cutter arbor (202) and panel interval.

4. A new character bender as claimed in claim 3, wherein: the center of the support column (103) and the center of a clamping mechanism of the cutting device (2) are located on the same horizontal plane, scales are uniformly arranged on the support column (103) from the center upwards to the downwards, and fastening parts used for being fixed at the position of the support column (103) are installed on the upper base (106) and the lower base (107).

5. The new character bender as claimed in claim 4, wherein: the clamping mechanism comprises main body fixing plates (205) arranged on a workbench in parallel, the rear ends of the main body fixing plates (205) are provided with fastening fixing plates (206), the main body fixing plates (205) and the fastening fixing plates (206) are fixedly installed on the mounting columns, the front ends of the fixing plates are arranged in an open mode, connecting plates (207) are installed between the main body fixing plates (205) in a sliding mode, power fixing plates (208) close to the fastening fixing plates (206) are arranged at the outer ends of the connecting plates (207), clamping rear plates (209) are arranged at the outer ends of the fixing plates (208), power parts (210) are evenly arranged on the peripheries of the power fixing plates (208), the power parts (210) are in power connection with clamping front plates (211), the clamping front plates (211) are located on the outer sides of the clamping rear plates (209), and gaps for clamping plates are formed between the clamping front plates (211) and the clamping rear plates (, and the fastening fixing plate (206) is provided with an adjusting bolt for adjusting the distance between the power fixing plate (208) and the fastening fixing plate (206).

6. The new character bender as claimed in claim 1, wherein: the conveying roller (105) comprises a driving conveying roller (108) and a driven conveying roller (109), the lower end of the driving conveying roller (108) penetrates out of the supporting plate (102) to be connected with a power device through a belt, and the upper end of the driving conveying roller (108) penetrates out of the conveying top plate (101).

7. The new character bender as claimed in claim 6, wherein: the upper end of the limiting driving roller (303) penetrating out of the feeding top plate (301) is connected with the upper end of the driving conveying roller (108) through a belt.

8. The new character bender as claimed in claim 1, wherein: the adjusting component is an air cylinder (305) which is arranged on the mounting plate in an up-down symmetrical mode, and a piston rod of the air cylinder (305) penetrates through the mounting plate to be connected with a mounting seat of the limiting driven roller (304).

9. The new character bender as claimed in claim 1, wherein: the bending device (4) comprises an upper plate (401) and a lower plate (402) which are arranged in parallel, a vertical plate (403) is arranged between the upper plate (401) and the lower plate (402), a bending mechanism is arranged between the upper plate (401) and the lower plate (402) and on one side of the vertical plate (403), and a bending arc motor (404) for driving the bending mechanism to bend is arranged on the lower portion of the lower plate (402).