CN109576625B

CN109576625B - A galvanizing rig for neodymium iron boron magnetism iron

Info

Publication number: CN109576625B
Application number: CN201910092170.XA
Authority: CN
Inventors: 王利
Original assignee: Tianjin Nibboh Magnets Co ltd
Current assignee: Tianjin Nibboh Magnets Co ltd
Priority date: 2019-01-30
Filing date: 2019-01-30
Publication date: 2021-01-15
Anticipated expiration: 2039-01-30
Also published as: CN109576625A

Abstract

The invention discloses a zinc plating device for neodymium iron boron magnet, which comprises a placing box, wherein a partition plate is arranged inside the placing box, two ends of the partition plate are fixedly connected with the inner side wall of the placing box, zinc water is arranged below the partition plate, two side faces of the placing box are both fixedly connected with supporting plates, a forward and reverse rotating motor is arranged above the supporting plates, an eccentric wheel is fixedly connected with the outer surface of the output end of the forward and reverse rotating motor, a through hole is formed in the upper surface of the partition plate, a fixing box is arranged inside the zinc water, the neodymium iron boron magnet is arranged inside the fixing box, the top end of the fixing box penetrates through the through hole and extends to the outside of the through hole, symmetrical grooves are formed in the upper part of the inner side wall of the. The hot air blowing type neodymium iron boron magnet drying device is reasonable in design and structure, the fixing box can shake in zinc water, the neodymium iron boron magnet galvanizing effect is improved, hot air is blown to the neodymium iron boron magnet, the neodymium iron boron magnet drying effect is achieved, and the neodymium iron boron magnet galvanizing efficiency is improved.

Description

A galvanizing rig for neodymium iron boron magnetism iron

Technical Field

The invention relates to the technical field of galvanization, in particular to a galvanization device for a neodymium iron boron magnet.

Background

Galvanization refers to a surface treatment technology for plating a layer of zinc on the surface of metal, alloy or other materials to play roles of beauty, rust prevention and the like, the mainly adopted method at present is hot galvanizing, also called hot dip galvanizing and hot dip galvanizing, and is an effective metal anticorrosion mode, the galvanization is mainly used on metal structure facilities in various industries, and a member subjected to rust removal is immersed in molten zinc of about five hundred degrees, so that a zinc layer is attached to the surface of the member.

The neodymium iron boron magnet can be divided into bonded neodymium iron boron and sintered neodymium iron boron, bonding is actually injection molding, sintering is vacuum pumping and is formed through high-temperature heating, the neodymium iron boron magnet is a permanent magnet with the strongest magnetic force at normal temperature so far, at the present stage, in order to guarantee the super-strong magnetism of the neodymium iron boron magnet, the protection of the neodymium iron boron magnet is increased by utilizing a hot galvanizing mode, and therefore, a galvanizing device for the neodymium iron boron magnet is provided.

Disclosure of Invention

One) technical problem to be solved

The invention aims to make up the defects of the prior art and provides a zinc plating device for a neodymium iron boron magnet.

II) technical scheme

In order to achieve the purpose, the invention provides the following technical scheme: a zinc plating device for neodymium iron boron magnet comprises a placing box, wherein a partition plate is arranged inside the placing box, two ends of the partition plate are fixedly connected with the inner side wall of the placing box, zinc water is arranged below the partition plate, two side faces of the placing box are fixedly connected with a supporting plate, a positive and negative rotation motor is arranged above the supporting plate, an eccentric wheel is fixedly connected with the outer surface of the output end of the positive and negative rotation motor, a through hole is formed in the upper surface of the partition plate, a fixing box is arranged inside the zinc water, a neodymium iron boron magnet is arranged inside the fixing box, the top end of the fixing box penetrates through the through hole and extends to the outside of the through hole, symmetrical grooves are formed in the upper portion of the inner side wall of the placing box, symmetrical grooves are formed above the partition plate, one end, close to the grooves of a moving plate, of the moving plate extends to the inside of the grooves, the inside cover of first siphunculus is equipped with the slide bar, the top of slide bar and the interior roof fixed connection of recess, the bottom of slide bar and the interior diapire fixed connection of recess, the spout has been seted up to the right part of movable plate bottom surface, the top of fixed case extends to the inside of spout, the upper portion of fixed case left surface and the upper portion of fixed case right flank are all fixed to be inlayed and are had the second siphunculus, the inside cover of second siphunculus is equipped with the polished rod, the both ends of polished rod all with the inside wall fixed connection of spout, the surface winding of polished rod has symmetrical first powerful spring, the left surface of fixed case and the right flank of fixed case are all fixed to be inlayed and are had vibrating motor.

The middle part of the upper surface of the placing box is provided with a fixed hole, an exhaust fan is arranged in the fixed hole, the outer surface of the exhaust fan is fixedly connected with a fixed ring, the outer surface of the fixed ring is fixedly connected with the inner wall of the fixed hole, the inner top wall of the placing box is fixedly connected with a symmetrical fixed plate, a heating wire is arranged below the exhaust fan, two ends of the heating wire are fixedly connected with the outer surface of the fixed plate, the upper surface of the movable plate is fixedly connected with symmetrical connecting plates, one side surface of the connecting plates, which is far away from each other, is provided with teeth, the inner top wall of the placing box is fixedly embedded with a symmetrical third three-way pipe, the top of the connecting plate penetrates through the third three-way pipe and extends to the outside of the third three-way pipe, the lower part of the outer surface of the connecting plate is wound, the bottom of expanding spring is connected with the last fixed surface of movable plate, the last fixed surface who places the case is connected with symmetrical baffle, the inside of baffle has been seted up and has been passed the slot, the inner wall fixedly connected with protection shield that passes the slot, the inside cover that passes the slot is equipped with the kelly, the kelly is close to the one end and the tooth mesh mutually, the one end that the tooth was kept away from to the kelly has the push rod through the fixed hinge joint of first round pin axle, the kelly passes through second round pin axle and protection shield fixed hinge joint, the top fixedly connected with push pedal of push rod, the bottom fixedly connected with second powerful spring of kelly, the bottom of second powerful spring and the last fixed surface who places the case are connected.

Furthermore, the bottom surface of the forward and reverse rotating motor is fixedly connected with a protection seat, and the bottom surface of the protection seat is fixedly connected with the upper surface of the supporting plate.

By adopting the technical scheme, the zinc plating device for the neodymium iron boron magnet can increase the protection of the positive and negative rotation motor, and the stability of the positive and negative rotation motor during working is ensured.

Furthermore, the upper surface of the partition board is fixedly connected with a limiting block, and the vertical distance value from the limiting block to the moving board is smaller than the vertical distance from the bottom surface of the vibrating motor to the bottom surface of the partition board.

Through adopting above-mentioned technical scheme, make a galvanizing rig for neodymium iron boron magnetism iron boron can effectual realization to the injecing of moving plate position, can effectual increase protect vibrating motor, avoid vibrating motor and zinc water phase contact.

Furthermore, liquid inlet holes are formed in the bottom of the fixing box and are arranged at equal intervals, and the number of the liquid inlet holes is not less than five.

Through adopting above-mentioned technical scheme, make a galvanizing rig for neodymium iron boron magnetism iron can effectual assurance zinc water can get into the inside of fixed case, can guarantee galvanizing efficiency.

Furthermore, a lattice net is arranged below the heating wire, and two ends of the lattice net are fixedly connected with the inner side wall of the fixing plate.

Through adopting above-mentioned technical scheme, make a galvanizing rig for neodymium iron boron magnetism iron boron.

Furthermore, the horizontal length value of the fixed box is smaller than that of the through hole, and the horizontal distance value between the two sides of the movable plate close to each other is larger than that between the two sides of the fixed plate far away from each other.

Through adopting above-mentioned technical scheme, make a galvanizing rig for neodymium iron boron magnetism iron can the effectual fixed case of assurance get into the zinc aquatic of baffle below, can the effectual inside of guaranteeing that the heating wire can get into fixed case.

III) beneficial effects

Compared with the prior art, this kind of a zinc-plating device for neodymium iron boron magnetism iron boron possesses following beneficial effect:

firstly, the method comprises the following steps: according to the invention, the horizontal length value of the fixed box is set to be smaller than that of the through hole, the fixed box can be effectively ensured to enter zinc water below the partition plate, the neodymium iron boron magnet is galvanized, the horizontal distance value between the side surfaces, close to each other, of the movable plate is set to be larger than the horizontal distance value between the side surfaces, far away from each other, of the fixed plate, the electric heating wire can be effectively ensured to enter the fixed box, the neodymium iron boron magnet is dried, the position of the movable plate can be effectively limited through the limit block fixedly connected to the upper surface of the partition plate, meanwhile, the protection of the vibration motor is increased, and the vibration motor is prevented from being in contact with the zinc water.

Secondly, the method comprises the following steps: the invention makes the push plate move upwards by reverse transmission of the forward and reverse rotating motor, makes the clamping rod push the teeth downwards by utilizing the matching arrangement between the clamping rod and the teeth to realize the downward movement of the connecting plate to drive the movable plate to fall down to make the fixed box enter the zinc water, makes the vibration motor work normally by utilizing the elasticity of the first strong spring by utilizing the vibration of the vibration motor to make the fixed box shake in the zinc water to improve the zinc plating effect on the neodymium iron boron magnet, makes the push plate move downwards by utilizing the forward transmission of the forward and reverse rotating motor, makes the clamping rod push the teeth upwards by utilizing the matching arrangement between the clamping rod and the teeth to make the electric heating wire positioned in the fixed box, and makes the electric heating wire be electrified and heated to realize the heating of the air, the exhaust fan is communicated with the municipal power supply to blow the hot air to the neodymium iron boron magnet to achieve the effect of quickly drying the neodymium iron boron magnet, the zinc plating efficiency of the neodymium iron boron magnet is improved.

Drawings

FIG. 1 is a cross-sectional view of a holding box of the present invention;

FIG. 2 is an enlarged view of the structure at A in FIG. 1 according to the present invention;

FIG. 3 is an enlarged view of the structure at B in FIG. 1 according to the present invention;

FIG. 4 is an enlarged view of the structure at C in FIG. 1 according to the present invention.

In the figure: 1. placing a box; 2. a partition plate; 3. a support plate; 4. a positive and negative rotation motor; 5. an eccentric wheel; 6. a protective seat; 7. a limiting block; 8. moving the plate; 9. a groove; 10. a slide bar; 11. a first through pipe; 12. a third pipe; 13. a tension spring; 14. a connecting plate; 15. teeth; 16. a baffle plate; 17. inserting the slot; 18. a protection plate; 19. a clamping rod; 20. a push rod; 21. a first pin shaft; 22. pushing the plate; 23. a second pin shaft; 24. a second strong spring; 25. a fixing hole; 26. an exhaust fan; 27. a fixing ring; 28. a fixing plate; 29. an electric heating wire; 30. a lattice grid; 31. inserting holes; 32. a fixed box; 33. a liquid inlet hole; 34. a chute; 35. a second pipe; 36. a polish rod; 37. a first strong spring; 38. a vibration motor; 39. a neodymium iron boron magnet; 40. zinc water.

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.

As shown in fig. 1 to 4, the present invention provides a technical solution: a zinc plating device for neodymium iron boron magnet comprises a placing box 1, a partition plate 2 is arranged inside the placing box 1, two ends of the partition plate 2 are fixedly connected with the inner side wall of the placing box 1, zinc water 40 is arranged below the partition plate 2, supporting plates 3 are fixedly connected with two side faces of the placing box 1, a forward and reverse motor 4 is arranged above the supporting plates 3, an eccentric wheel 5 is fixedly connected with the outer surface of the output end of the forward and reverse motor 4, a through hole 31 is formed in the upper surface of the partition plate 2, a fixed box 32 is arranged inside the zinc water 40, a neodymium iron boron magnet 39 is arranged inside the fixed box 32, the top end of the fixed box 32 penetrates through the through hole 31 and extends to the outside of the through hole 31, a symmetrical groove 9 is formed in the upper part of the inner side wall of the placing box 1, a symmetrical moving plate 8 is arranged above the partition plate 2, one end, close to the groove 9, of the moving plate 8 extends, the inside cover of first siphunculus 11 is equipped with slide bar 10, the top of slide bar 10 and the interior roof fixed connection of recess 9, the bottom of slide bar 10 and the interior diapire fixed connection of recess 9, spout 34 has been seted up to the right part of movable plate 8 bottom surface, the top of fixed case 32 extends to the inside of spout 34, the upper portion of fixed case 32 left surface and the upper portion of fixed case 32 right flank are all fixed to be inlayed and are had second siphunculus 35, the inside cover of second siphunculus 35 is equipped with polished rod 36, polished rod 36's both ends all with the inside wall fixed connection of spout 34, polished rod 36's surface winding has symmetrical first powerful spring 37, the left surface of fixed case 32 and the right flank of fixed case 32 are all fixed to be inlayed and are had vibrating.

A fixing hole 25 is arranged in the middle of the upper surface of the placing box 1, an exhaust fan 26 is arranged in the fixing hole 25, a fixing ring 27 is fixedly connected to the outer surface of the exhaust fan 26, the outer surface of the fixing ring 27 is fixedly connected with the inner wall of the fixing hole 25, a symmetrical fixing plate 28 is fixedly connected to the inner top wall of the placing box 1, a heating wire 29 is arranged below the exhaust fan 26, two ends of the heating wire 29 are fixedly connected with the outer surface of the fixing plate 28, a symmetrical connecting plate 14 is fixedly connected to the upper surface of the moving plate 8, a tooth 15 is arranged on one side surface of the connecting plate 14 away from each other, a symmetrical third three-way pipe 12 is fixedly embedded in the inner top wall of the placing box 1, the top of the connecting plate 14 penetrates through the third three-way pipe 12 and extends to the outside of the third three-way pipe 12, a telescopic spring 13 is wound on the, bottom and the last fixed surface of movable plate 8 of expanding spring 13 are connected, place the symmetrical baffle 16 of last fixed surface of case 1, the inside of baffle 16 has been seted up and has been passed slot 17, the inner wall fixedly connected with protection shield 18 that alternates slot 17, the inside cover that alternates slot 17 is equipped with kelly 19, kelly 19 is close to the one end and the meshing of tooth 15 mutually of tooth 15, kelly 19 keeps away from the one end of tooth 15 and has push rod 20 through the fixed articulated push rod 20 of first round pin axle 21, kelly 19 is through the fixed articulated of second round pin axle 23 and protection shield 18, the top fixedly connected with push pedal 22 of push rod 20, kelly 19's bottom fixedly connected with second powerful spring 24, the bottom of second powerful spring 24 and the last fixed surface who places case 1 are connected.

Further, the bottom surface of the forward and reverse rotation motor 4 is fixedly connected with a protection seat 6, and the bottom surface of the protection seat 6 is fixedly connected with the upper surface of the support plate 3.

Through adopting above-mentioned technical scheme, make a galvanizing rig for neodymium iron boron magnetism iron magnetism.

Further, the upper surface of the partition board 2 is fixedly connected with a limiting block 7, and the vertical distance between the limiting block 7 and the moving plate 8 is smaller than the vertical distance between the bottom surface of the vibration motor 38 and the bottom surface of the partition board 2.

Through adopting above-mentioned technical scheme, make a galvanizing rig for neodymium iron boron magnetism iron boron can effectual realization to the injecing of moving plate 8 position, can effectual increase protect vibrating motor 38, avoid vibrating motor 38 and zinc water 40 to contact.

Further, the bottom of the fixing box 32 is provided with liquid inlet holes 33 which are arranged at equal intervals, and the number of the liquid inlet holes 33 is not less than five.

Through adopting above-mentioned technical scheme, make a galvanizing rig for neodymium iron boron magnetism iron boron can effectual assurance zinc water 40 can get into the inside of fixed case 32, can guarantee galvanizing efficiency.

Further, a lattice net 30 is arranged below the heating wire 29, and both ends of the lattice net 30 are fixedly connected with the inner side wall of the fixing plate 28.

Through adopting above-mentioned technical scheme, make a galvanizing rig for neodymium iron boron magnet can effectual increase to neodymium iron boron magnet 39's protection, avoid neodymium iron boron magnet 39 and heating wire 29 to contact, influence neodymium iron boron magnet 39's zinc-plated effect.

Further, the horizontal length of the fixed box 32 is smaller than that of the insertion hole 31, and the horizontal distance between the sides of the moving plate 8 close to each other is larger than that between the sides of the fixed plate 28 away from each other.

Through adopting above-mentioned technical scheme, make a galvanizing rig for neodymium iron boron magnetism iron boron can effectual assurance fixed case 32 get into the zinc water 40 of baffle 2 below, can effectual assurance heating wire 29 can get into the inside of fixed case 32.

The working principle is as follows: the horizontal length value of the fixed box 32 is smaller than that of the through hole 31, the fixed box 32 can be effectively ensured to enter the zinc water 40 below the partition plate 2, the effect of galvanizing the neodymium iron boron magnet 39 is achieved, the horizontal distance value between the side faces, close to each other, of the movable plate 8 is larger than the horizontal distance value between the side faces, far away from each other, of the fixed plate 28, the electric heating wire 29 can be effectively ensured to enter the fixed box 32, the drying effect of the neodymium iron boron magnet 39 is achieved, the limiting block 7 is fixedly connected to the upper surface of the partition plate 2, the position of the movable plate 8 can be effectively limited, meanwhile, the protection of the vibrating motor 38 is increased, the vibrating motor 38 is prevented from contacting with the zinc water 40, the positive and negative rotating motor 4 is communicated with a municipal power supply, the positive and negative rotating motor 4 reversely transmits, the push plate 22 moves upwards, and the clamping rod, the clamping rod 19 pushes the teeth 15 to move downwards to realize the downward movement of the connecting plate 14, the moving plate 8 is driven to fall, the fixed box 32 enters the zinc water 40, the fixed box 32 is shaken in the zinc water 40 by arranging the chute 34, the polished rod 36 and the second pipe 35 and utilizing the elasticity of the first strong spring 37, the vibrating motor 38 is connected with a municipal power supply, the vibrating motor 38 vibrates to enable the fixed box 32 to shake in the zinc water 40 to improve the zinc plating effect on the neodymium iron boron magnet 39, the forward and reverse motor 4 positively transmits to enable the push plate 22 to move downwards, the clamping rod 19 pushes the teeth 15 to move upwards by utilizing the matching arrangement between the clamping rod 19 and the teeth 15, the electric heating wire 29 is positioned in the fixed box 32 and communicated with an external power supply to realize the heating of air, the exhaust fan 26 is communicated with the municipal power supply to enable hot air to blow to the neodymium iron boron magnet 39, and the quick drying effect on the neodymium iron boron magnet 39 is achieved, the zinc plating efficiency of the neodymium iron boron magnet 39 is improved.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

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 utility model provides a zinc-plating device for neodymium iron boron magnetism iron boron, is including placing case (1), its characterized in that: the inner part of the placing box (1) is provided with a partition board (2), the two ends of the partition board (2) are fixedly connected with the inner side wall of the placing box (1), zinc water (40) is arranged below the partition board (2), two side faces of the placing box (1) are fixedly connected with a support board (3), a forward and reverse motor (4) is arranged above the support board (3), an eccentric wheel (5) is fixedly connected with the outer surface of the output end of the forward and reverse motor (4), the upper surface of the partition board (2) is provided with a through hole (31), a fixed box (32) is arranged inside the zinc water (40), an NdFeB magnet (39) is arranged inside the fixed box (32), the top end of the fixed box (32) penetrates through the through hole (31) and extends to the outer part of the through hole (31), and the upper part of the inner side wall of the placing box (1) is provided with symmetrical grooves, the top of baffle (2) is equipped with symmetrical movable plate (8), the one end that movable plate (8) are close to recess (9) extends to the inside of recess (9), the inside fixed the inlaying of movable plate (8) has first siphunculus (11), the inside cover of first siphunculus (11) is equipped with slide bar (10), the top of slide bar (10) and the interior roof fixed connection of recess (9), the bottom of slide bar (10) and the interior diapire fixed connection of recess (9), spout (34) have been seted up to the right part of movable plate (8) bottom surface, the top of fixed case (32) extends to the inside of spout (34), the upper portion of fixed case (32) left surface and the upper portion of fixed case (32) right flank all fixed the inlaying have second siphunculus (35), the inside cover of second siphunculus (35) is equipped with polished rod (36), the both ends of polished rod (36) all with the inside wall fixed connection of spout (34), the outer surface of the polish rod (36) is wound with symmetrical first strong springs (37), and the left side surface of the fixed box (32) and the right side surface of the fixed box (32) are fixedly embedded with vibration motors (38);

the middle part of the upper surface of the placing box (1) is provided with a fixing hole (25), an exhaust fan (26) is arranged in the fixing hole (25), the outer surface of the exhaust fan (26) is fixedly connected with a fixing ring (27), the outer surface of the fixing ring (27) is fixedly connected with the inner wall of the fixing hole (25), the inner top wall of the placing box (1) is fixedly connected with a symmetrical fixing plate (28), an electric heating wire (29) is arranged below the exhaust fan (26), two ends of the electric heating wire (29) are fixedly connected with the outer surface of the fixing plate (28), the upper surface of the moving plate (8) is fixedly connected with a symmetrical connecting plate (14), one side surface, far away from each other, of the connecting plate (14) is provided with teeth (15), the inner top wall of the placing box (1) is fixedly embedded with a symmetrical third three-way pipe (12), the top of the connecting plate (14) penetrates through the third three-way pipe (12) and extends to the outside of, the lower part of connecting plate (14) surface is twined and is had expanding spring (13), the top of expanding spring (13) and the interior roof fixed connection who places case (1), the bottom of expanding spring (13) and the last fixed surface of movable plate (8) are connected, the last fixed surface who places case (1) is connected with symmetrical baffle (16), slot (17) have been seted up to the inside of baffle (16), the inner wall fixedly connected with guard plate (18) of passing slot (17), the inside cover that passes slot (17) is equipped with kelly (19), the one end that kelly (19) are close to tooth (15) meshes with tooth (15) mutually, the one end that tooth (15) were kept away from in kelly (19) is through the fixed articulated push rod (20) that has first round pin axle (21), kelly (19) are fixed articulated with guard plate (18) through second round pin axle (23), the top fixedly connected with push pedal (22) of push rod (20), the bottom fixedly connected with second powerful spring (24) of kelly (19), the bottom and the last fixed surface who places case (1) of second powerful spring (24) are connected.

2. The galvanizing apparatus for a neodymium-iron-boron magnet according to claim 1, characterized in that: the bottom surface of the forward and reverse rotating motor (4) is fixedly connected with a protection seat (6), and the bottom surface of the protection seat (6) is fixedly connected with the upper surface of the supporting plate (3).

3. The galvanizing apparatus for a neodymium-iron-boron magnet according to claim 1, characterized in that: the upper surface of baffle (2) fixed connection has stopper (7), and stopper (7) are less than the vertical distance of vibrating motor (38) bottom surface apart from the vertical distance of baffle (2) bottom surface apart from the vertical distance value of movable plate (8).

4. The galvanizing apparatus for a neodymium-iron-boron magnet according to claim 1, characterized in that: the bottom of the fixed box (32) is provided with liquid inlet holes (33) which are arranged at equal intervals, and the number of the liquid inlet holes (33) is not less than five.

5. The galvanizing apparatus for a neodymium-iron-boron magnet according to claim 1, characterized in that: a lattice net (30) is arranged below the electric heating wire (29), and two ends of the lattice net (30) are fixedly connected with the inner side wall of the fixing plate (28).

6. The galvanizing apparatus for a neodymium-iron-boron magnet according to claim 1, characterized in that: the horizontal length value of the fixed box (32) is smaller than that of the through hole (31), and the horizontal distance value between the side faces, close to each other, of the moving plate (8) is larger than that between the side faces, far away from each other, of the fixed plate (28).