Medium-density fiberboard production sizing equipment with material control and uniform laying functions

Abstract

The invention relates to the technical field of fiberboard processing, in particular to medium-density fiberboard production sizing equipment with a material control and uniform laying function, which comprises a bottom frame of a concave structure, a groove is formed in the top surface of the bottom frame and located at the center of a rear end frame, a limiting frame is arranged in the rear end of the bottom frame, and the two sides and the front end of the limiting frame are of opening structures; a reciprocating assembly is arranged in the limiting frame, and coating mechanisms are arranged at the two ends of the inner wall of the bottom of the bottom frame. On the basis that multiple sets of fiberboards are pushed in a reciprocating mode to coat colloid, the distance between a board body and a gluing component can be adjusted according to the thickness of the fiberboards, so that it is guaranteed that the colloid on the surfaces of the fiberboards is evenly received, the coating effect is improved, meanwhile, quantitative extrusion is forced through the material supplementing mechanism, colloid waste is reduced, and the production efficiency is improved. And the dried glue can be conveniently and automatically removed, so that the surface coating uniformity of the fiberboard is prevented from being influenced, and the glue applying efficiency of the fiberboard is improved.

Description

Technical Field

[0001] The invention relates to the technical field of fiberboard processing, in particular to medium-density fiberboard production glue application equipment with the function of controlling and evenly spreading materials. Background Art

[0002] Medium-density fiberboard is a kind of artificial board made by mechanically separating and chemically treating wood or plant fibers, adding adhesives and waterproofing agents, and then forming them under high temperature and high pressure. It is an ideal artificial board for making furniture. The structure of medium-density fiberboard is more uniform than that of natural wood, and it also avoids problems such as decay and insect infestation. The fiberboard with a veneer on the outside will make its appearance more beautiful.

[0003] Specifically, reference may be made to the gluing device for fiberboard production with publication number CN220496806U, which realizes double-sided uniform gluing of fiberboards through mechanical coordination. However, although the above patent can perform double-sided gluing, in actual operation, due to the different thickness of the board, when the position of the gluing component is fixed, it is easy for the board surface to be difficult to fit with the gluing component, thereby affecting the uniform gluing of the board surface; at the same time, due to repeated gluing, the surface of the gluing component has multiple layers of colloid superimposed on its surface and part of the glue dries into a solid, resulting in an uneven surface of the gluing component, further affecting the uniformity of gluing on the fiberboard surface;

[0004] In view of the technical defects in this aspect, a solution is now proposed. Summary of the invention

[0005] The purpose of the present invention is to adjust the distance between the board body and the gluing component according to the thickness of the fiberboard on the basis of reciprocatingly pushing the coated colloid on multiple groups of fiberboards, so as to ensure that the colloid on the fiberboard surface is evenly supplied and the coating effect is improved. At the same time, the feeding mechanism is used to force the quantitative extrusion of the material to reduce the waste of colloid, and to facilitate the automatic removal of the dried colloid to avoid affecting the uniformity of the coating on the fiberboard surface, thereby improving the gluing efficiency of the fiberboard.

[0006] The object of the present invention can be achieved by the following technical scheme: a medium-density fiberboard production glue-applying device with a material control and even spreading function comprises a bottom frame of a concave structure, a top surface of the bottom frame is provided with a groove at the center of the rear end frame, a limit frame is provided inside the rear end of the bottom frame, and both sides and the front end of the limit frame are provided with an open structure, a reciprocating component is provided inside the limit frame, and a coating mechanism is provided at both ends of the bottom inner wall of the bottom frame;

[0007] The reciprocating assembly includes a motor 1, which is fixedly mounted at the center of the inner wall at the rear end of the limit frame, and the front end of the motor 1 is rotatably connected to a rotating bar, the bottom of the rotating bar is hinged with a hinge rod, the hinge rod is movably connected to a push frame, and the push frame is slidably connected to the inner center of the limit frame;

[0008] The coating mechanism comprises two groups of coating rollers, and the two groups of coating rollers are movably mounted on the inner wall at the bottom of the bottom frame at both ends.

[0009] Furthermore, a fan-shaped groove is provided at the inner center of the push frame, and the hinge rod extends inside the fan-shaped groove. Both ends of the hinge rod are circular curved surface structures, and one end of the hinge rod is rotatably connected to the angle end of the fan-shaped groove.

[0010] Furthermore, a cylinder 2 is arranged at the center of the inner wall on one side of the groove, and a movable plate is fixedly installed at the output end of the cylinder 2 through a push rod, a round shaft 1 is arranged at the front end of the top surface of the movable plate, a fixed frame with a concave structure is arranged at the front end notch inside the groove, and an inclined groove 1 is arranged on the top surface of the fixed frame, the round shaft 1 is slidably connected to the end position inside the inclined groove 1, and the front end of the fixed frame is fixedly connected to the limit frame.

[0011] Furthermore, a card frame with an inverted concave structure is provided on the outside of each group of the paint rollers, the card frame is fixedly installed on the inner wall of the bottom of the bottom frame and is clamped at the top of the paint roller, and a transmission wheel is fixedly installed at the center of the top surface of the card frame, and a second motor is provided on the top of one group of the transmission wheels through a machine base, and a transmission belt is commonly connected between the front and rear groups of the transmission wheels, and the bottom of the transmission wheel is fixedly connected to a driving gear through the end of a rotating shaft extending to the inside of the paint roller, and driven gears are respectively meshed and connected on both sides of the driving gear.

[0012] Furthermore, the two groups of driven gears are respectively rotatably connected inside the paint roller, and the driven gears are rotatably connected to the bottom inner wall of the bottom frame. The two groups of driven gears are respectively meshed with the tooth groove groups set on the inner wall of the paint roller, and a wedge-shaped scraper is fixedly installed on the inner wall of the card frame away from the feeding mechanism.

[0013] Furthermore, the feeding mechanism includes a feeding cylinder, which is fixedly installed on one side of the paint roller through a machine base, and a feeding roller is rotatably embedded in a side of the feeding cylinder close to the paint roller, a piston is penetrated on the other side of the feeding cylinder, and a rod body at one end of the piston extends to the outside of the feeding cylinder and is fixedly installed with a rotating cylinder.

[0014] Furthermore, a plurality of groups of inclined grooves 2 and transverse grooves are arranged on the outside of the rotating drum, and the transverse grooves are arranged between the head and tail ends of two adjacent groups of inclined grooves 2, and a sleeve is sleeved on the outside of the rotating drum, and a round shaft 2 is fixedly installed at the opening of the inner wall at the top of the sleeve, and the round shaft 2 is slidably connected to the inside of one group of inclined grooves 2, a spring coil is commonly arranged between the open end of the rotating drum and the feeding cylinder, and the spring coil is rotatably connected to the rotating drum, and a dual-axis motor is commonly arranged between the left and right groups of the rotating drum, and the dual-axis motor is fixedly installed at the top center of the bottom frame through a machine base.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention is that a motor drives the rotating bar to rotate and pulls the hinge rod to deflect and move, forcing the end of the hinge rod away from the angle to continuously slide and press along the curved surface of the fan-shaped groove to realize the left and right reciprocating movement of the push frame, and the push frame presses the fiberboards on both sides to move, and moves relative to the coating mechanism, so as to facilitate the sequential application of glue to the surface of the fiberboard;

[0017] Cylinder 2 is used to push the movable plate to move, and the circular axis moves in a straight line and along the inside of the inclined groove 1. The inner wall of the inclined groove 1 is resisted, forcing the fixed frame, the limit frame and the fiberboard inside thereof to move toward the coating mechanism until the surface of the fiberboard is close to the coating mechanism. Only then can the surfaces of the fiberboards of different thicknesses be coated with glue, so as to keep the surface of the board evenly coated with glue and improve the gluing efficiency of the fiberboard.

[0018] 2. The present invention is to arrange a feeding mechanism and a coating mechanism for use in coordination, a double-axis motor drives two sets of sleeves to rotate counterclockwise and rotate relative to the rotating drum, the rotating drum moves toward the feeding cylinder, and the piston is inserted into the inside of the feeding cylinder, so that the colloid inside the feeding cylinder feeds the surface of the feeding roller, and the glue is coated on the surface of the fiberboard by rolling friction of the coating roller, and the coating roller that passes over the surface of the fiberboard rotates to the wedge-shaped scraper, and the tip of the wedge-shaped scraper is used to shovel up the glue blocks remaining on the surface of the coating roller to keep the surface of the coating roller flat, so as to reduce the influence on the coating effect on the surface of the fiberboard;

[0019] At the same time, when the second circular shaft moves completely into the transverse groove, the rotating drum and the piston return to their positions and wait for the next exhaust and extrusion. In this way, the piston reciprocates to achieve quantitative discharge of the feeding cylinder to avoid waste caused by excessive glue extrusion and excessive glue coating on the fiberboard surface, thereby further improving the coating efficiency of the fiberboard surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to facilitate understanding by those skilled in the art, the present invention is further described below with reference to the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 A top view of the overall structure of the present invention;

[0023] Figure 3 It is a schematic diagram of the combination of the limit frame and the reciprocating assembly of the present invention;

[0024] Figure 4 It is a bottom schematic diagram of the combination of the coating mechanism and the feeding mechanism of the present invention;

[0025] Figure 5 It is a structural schematic diagram of the feeding mechanism of the present invention;

[0026] Figure 6 It is a half-section schematic diagram of the combination of the feeding cylinder, the rotating cylinder and the sleeve of the present invention;

[0027] Figure 7 It is a combined and cross-sectional view of the sleeve and the rotating drum of the present invention.

[0028] In the figure: 1. bottom frame; 101. groove; 102. cylinder 2; 103. movable plate; 104. circular shaft 1; 105. fixed frame; 106. inclined slot 1; 2. limit frame; 3. reciprocating assembly; 31. motor 1; 32. rotating bar; 33. hinge rod; 34. push frame; 35. fan-shaped slot; 4. coating mechanism; 41. coating roller; 42. clamping frame; 43. transmission wheel; 44. motor 2; 45. driving gear; 46. driven gear; 47. tooth groove group; 48. wedge scraper; 5. feeding mechanism; 51. feeding cylinder; 52. feeding roller; 53. piston; 54. rotating cylinder; 55. inclined slot 2; 56. transverse slot; 57. sleeve; 58. circular shaft 2; 59. spring assembly coil; 510. double-axis motor. DETAILED DESCRIPTION

[0029] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0030] Example 1: Please refer to Figure 1 - Figure 7 As shown, a medium-density fiberboard production glue-applying device with a material control and evenly spreading function comprises a bottom frame 1 of a concave structure, a top surface of the bottom frame 1 is provided with a groove 101 at the center of the rear end frame, a limit frame 2 is provided inside the rear end of the bottom frame 1, and both sides and the front end of the limit frame 2 are provided with an open structure, a reciprocating component 3 is provided inside the limit frame 2, and a coating mechanism 4 is provided at both ends of the bottom inner wall of the bottom frame 1;

[0031] Among them, the reciprocating component 3 includes a motor 31, which is fixedly installed at the center of the inner wall at the rear end of the limit frame 2, and the front end of the motor 31 is rotatably connected to a turn bar 32, the bottom of the turn bar 32 is hinged with a hinge rod 33, the hinge rod 33 is movably connected to a push frame 34, and the push frame 34 is slidably connected to the center of the limit frame 2, a fan-shaped groove 35 is provided at the center of the push frame 34, and the hinge rod 33 extends inside the fan-shaped groove 35, both ends of the hinge rod 33 are circular curved surface structures, and one end of the hinge rod 33 is rotatably clamped with the angle end of the fan-shaped groove 35.

[0032] Before gluing the fiberboard, two groups of wood fiberboards are respectively confined inside the limit frame 2, and the surface of the wood fiberboard is flush with the front end surface of the limit frame 2, and respectively corresponds to the coating mechanism 4 in front and back, and then the motor 31 is started to drive the rotating bar 32 to rotate, and pull the hinge rod 33 to deflect and move, forcing the end of the hinge rod 33 away from the angle to continuously slide and press along the curved surface of the fan-shaped groove 35 to realize the left and right reciprocating motion of the push frame 34, and the push frame 34 presses the fiberboards on both sides to move, and moves relative to the coating mechanism 4, so as to facilitate the sequential gluing and coating of the fiberboard surface;

[0033] It is worth noting that, due to the different thicknesses of the fiberboards, the surface of some fiberboards is difficult to be close to the surface of the coating mechanism 4 during the coating process, so the distance between the limit frame 2 and the coating mechanism 4 is adjusted according to the thickness of the fiberboard;

[0034] See also Figure 2 As shown, a cylinder 2 102 is provided at the center of the inner wall of one side of the groove 101, and a movable plate 103 is fixedly installed at the output end of the cylinder 2 102 through a push rod, and a round shaft 104 is provided at the front end of the top surface of the movable plate 103, and a fixed frame 105 with a concave structure is provided at the front end notch inside the groove 101, and an inclined groove 106 is provided on the top surface of the fixed frame 105, and the circular shaft 104 is slidably connected to the end position inside the inclined groove 106, and the front end of the fixed frame 105 is fixedly connected to the limit frame 2;

[0035] Start the second cylinder 102 to use the push rod to push the movable plate 103 to move, and the circular shaft 104 moves linearly and along the inside of the inclined groove 106. The inner wall of the inclined groove 106 is resisted, forcing the fixed frame 105, the limit frame 2 and the fiberboard inside thereof to move toward the coating mechanism 4 until the surface of the fiberboard is close to the coating mechanism 4, so that the glue coating can be applied to the surfaces of the fiberboards of different thicknesses.

[0036] Example 2: Please refer to Figure 2 and Figure 4 As shown, the coating mechanism 4 includes two groups of coating rollers 41, and the two groups of coating rollers 41 are movably mounted on the bottom inner wall of the bottom frame 1 at both ends;

[0037] Each set of coating rollers 41 is provided with a concave-shaped card frame 42 on the outside, which is fixedly mounted on the inner wall of the bottom of the bottom frame 1 and clamped on the top of the coating roller 41, and a transmission wheel 43 is fixedly mounted at the center of the top surface of the card frame 42, and a motor 2 44 is provided on the top of one set of transmission wheels 43 through the base;

[0038] A transmission belt is sleeved between the front and rear transmission wheels 43. A driving gear 45 is fixedly connected to the bottom of the transmission wheel 43 through the end of the rotating shaft extending to the inside of the coating roller 41, and driven gears 46 are respectively meshed and connected on both sides of the driving gear 45. The two sets of driven gears 46 are respectively rotatably connected to the inside of the coating roller 41, and the driven gears 46 are rotatably connected to the bottom inner wall of the bottom frame 1. The two sets of driven gears 46 are respectively meshed with tooth groove groups 47 provided on the inner wall of the coating roller 41. A feeding mechanism 5 is commonly provided between the left and right clamping frames 42, and a wedge-shaped scraper 48 is fixedly installed on the inner wall of the clamping frame 42 away from the feeding mechanism 5.

[0039] During the coating process, the starting motor 44 drives one of the transmission wheels 43 to rotate, and drives the other transmission wheel 43 to rotate under the transmission action of the transmission belt, and the driving gear 45 rotates synchronously with the transmission wheel 43 and drives the driven gears 46 at adjacent positions to engage and rotate. Since the driven gear 46 engages with the tooth groove group 47 during its rotation, the two groups of coating rollers 41 are forced to rotate synchronously and at a uniform speed, and the colloid contaminated on their surfaces is evenly applied to the surface of the fiberboard, so that the surfaces of multiple groups of fiberboards are evenly coated with glue at the same time, thereby improving the gluing efficiency of the fiberboard.

[0040] Embodiment 3: It is worth noting that, when the coating roller 41 is applying glue to the fiberboard, the surface of the coating roller 41 retains the colloid in advance and the colloid is coated on the surface of the fiberboard. The colloid is superimposed on the surface of the fiberboard, resulting in the continuous increase in the thickness of the glue layer on the surface of the coating roller 41, and the glue dries into a solid state, which affects the coating effect.

[0041] Therefore, by providing the feeding mechanism 5, the glue can be quantitatively retained on the surface of the coating roller 41 to achieve uniform coating on the surface of the fiberboard, while reducing the old glue retained on the surface of the coating roller 41 to affect the coating effect;

[0042] See also Figure 5 - Figure 7 As shown, the feeding mechanism 5 includes a feeding cylinder 51, which is fixedly installed at one side of the coating roller 41 through a machine base, and a feeding roller 52 is rotatably arranged inside a side of the feeding cylinder 51 close to the coating roller 41, a piston 53 is penetrated and arranged on the other side of the feeding cylinder 51, and a rod body at one end of the piston 53 extends to the outside of the feeding cylinder 51 and is fixedly installed with a rotating cylinder 54, and a plurality of groups of inclined grooves 55 and transverse grooves 56 are arranged on the outside of the rotating cylinder 54, and the transverse grooves 56 are arranged between the head and tail ends of two adjacent groups of inclined grooves 55;

[0043] A sleeve 57 is sleeved on the outside of the rotating drum 54, and a round shaft 58 is fixedly installed on the inner wall of the top of the sleeve 57 at the opening, and the round shaft 58 is slidably connected to the inside of one of the two inclined grooves 55. A spring coil 59 is commonly provided between the open end of the rotating drum 54 and the feeding drum 51, and the spring coil 59 and the rotating drum 54 are rotatably connected. A double-axis motor 510 is commonly provided between the left and right groups of rotating drums 54, and the double-axis motor 510 is fixedly installed at the top center of the bottom frame 1 through a machine base;

[0044] During the gluing process of the fiberboard, the dual-axis motor 510 is started synchronously, and the two sets of sleeves 57 are driven to rotate counterclockwise at the same time, and rotate relative to the rotating drum 54, and the round shaft 58 rotates with the sleeve 57 and moves along the inclined groove 55 to the inside of the transverse groove 56, and the inner wall of the inclined groove 55 is resisted by the second one, forcing the rotating drum 54 to move toward the feeding cylinder 51, the spring coil 59 is compressed, and the piston 53 is inserted into the feeding cylinder 51, so that the colloid inside the feeding cylinder 51 feeds to the surface of the feeding roller 52, and glue is added to the surface of the coating roller 41 as the coating roller 41 rotates.

[0045] At the same time, the coating roller 41 is used to roll and rub the glue on the fiberboard surface, and the coating roller 41 that has passed over the fiberboard surface is rotated to the wedge-shaped scraper 48, and the tip of the wedge-shaped scraper 48 is used to scrape up the glue blocks remaining on the surface of the coating roller 41 to keep the surface of the coating roller 41 smooth, so as to reduce the influence on the coating effect on the fiberboard surface;

[0046] At the same time, when the round shaft 58 is completely moved into the transverse groove 56, the round shaft 58 loses the pressure from the inner wall of the inclined groove 55, and the drum 54 and the piston 53 return to their original positions under the action of the rebound force of the spring coil 59, and wait for the next exhaust and extrusion. In this way, the piston 53 reciprocates to realize the quantitative discharge of the feeding cylinder 51, so as to avoid waste caused by excessive glue extrusion and excessive glue coating on the fiberboard surface, thereby further improving the coating efficiency of the fiberboard surface.

[0047] The preferred embodiments of the present invention disclosed above are only used to help explain the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to only specific implementation methods. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A medium density fiberboard production gluing device with a material control and even spreading function, comprising a bottom frame (1) with a concave structure, characterized in that: The top surface of the bottom frame (1) is provided with a groove (101) at the center of the rear end frame, a limit frame (2) is provided inside the rear end of the bottom frame (1), and both sides and the front end of the limit frame (2) are provided with an open structure, a reciprocating component (3) is provided inside the limit frame (2), and a coating mechanism (4) is provided at both ends of the bottom inner wall of the bottom frame (1); The reciprocating assembly (3) comprises a motor (31), the motor (31) is fixedly mounted at the center of the inner wall at the rear end of the limit frame (2), and the front end of the motor (31) is rotatably connected to a rotating bar (32), the bottom of the rotating bar (32) is hinged with a hinge rod (33), the hinge rod (33) is movably connected to a push frame (34), and the push frame (34) is slidably connected to the inner center of the limit frame (2); The coating mechanism (4) comprises two groups of coating rollers (41), and the two groups of coating rollers (41) are movably mounted on the inner wall of the bottom of the bottom frame (1) at both ends.

2. The medium density fiberboard production gluing equipment with material control and uniform spreading function according to claim 1 is characterized in that: A fan-shaped groove (35) is arranged at the center of the push frame (34), and the hinge rod (33) extends inside the fan-shaped groove (35). Both ends of the hinge rod (33) are circular curved surface structures, and one end of the hinge rod (33) is rotatably connected to the angle end of the fan-shaped groove (35).

3. The medium density fiberboard production gluing equipment with material control and uniform spreading function according to claim 1, characterized in that: A second cylinder (102) is arranged at the center of the inner wall of one side of the groove (101), and a movable plate (103) is fixedly installed at the output end of the second cylinder (102) through a push rod, and a round shaft (104) is arranged at the front end of the top surface of the movable plate (103), and a fixed frame (105) with a concave structure is arranged at the front end notch inside the groove (101), and an inclined groove (106) is arranged on the top surface of the fixed frame (105), and the round shaft (104) is slidably connected to the end position inside the inclined groove (106), and the front end of the fixed frame (105) is fixedly connected to the limit frame (2).

4. The medium density fiberboard production gluing equipment with material control and uniform spreading function according to claim 1, characterized in that: Each group of coating rollers (41) is provided with a card frame (42) with an inverted concave structure on the outside. The card frame (42) is fixedly mounted on the inner wall of the bottom of the bottom frame (1) and is card-engaged at the top of the coating roller (41). A transmission wheel (43) is fixedly mounted at the center of the top surface of the card frame (42). A second motor (44) is provided at the top of one group of the transmission wheels (43) through a machine base. A transmission belt is sleeved between the front and rear groups of the transmission wheels (43). A driving gear (45) is fixedly connected to the bottom of the transmission wheel (43) through the end of a rotating shaft extending to the inside of the coating roller (41), and driven gears (46) are respectively meshed and connected to the two sides of the driving gear (45).

5. The medium density fiberboard production gluing equipment with material control and uniform spreading function according to claim 4 is characterized in that: The two groups of driven gears (46) are respectively rotatably connected inside the coating roller (41), and the driven gears (46) are rotatably connected to the inner wall of the bottom of the bottom frame (1). The two groups of driven gears (46) are respectively meshed with tooth groove groups (47) provided on the inner wall of the coating roller (41). A feeding mechanism (5) is commonly provided between the left and right groups of clamping frames (42), and a wedge-shaped scraper (48) is fixedly installed on the inner wall of the clamping frame (42) away from the feeding mechanism (5).

6. The medium density fiberboard production gluing equipment with material control and uniform spreading function according to claim 1, characterized in that: The feeding mechanism (5) comprises a feeding cylinder (51), which is fixedly mounted on one side of the coating roller (41) via a machine base, and a feeding roller (52) is rotatably embedded in a side of the feeding cylinder (51) close to the coating roller (41), and a piston (53) is penetrated through the other side of the feeding cylinder (51), and a rod body at one end of the piston (53) extends to the outside of the feeding cylinder (51) and is fixedly mounted with a rotating cylinder (54).

7. The medium density fiberboard production gluing equipment with material control and uniform spreading function according to claim 6, characterized in that: The rotating drum (54) is provided with a plurality of groups of inclined grooves (55) and transverse grooves (56) on the outside, and the transverse grooves (56) are provided between the head and tail ends of two adjacent groups of inclined grooves (55). The rotating drum (54) is provided with a sleeve (57) on the outside, and a round shaft (58) is fixedly installed on the inner wall of the top of the sleeve (57) at the opening, and the round shaft (58) is slidably connected to the inside of one group of inclined grooves (55). A spring coil (59) is provided between the opening end of the rotating drum (54) and the feeding drum (51), and the spring coil (59) and the rotating drum (54) are rotatably connected. A double-axis motor (510) is provided between the left and right groups of the rotating drum (54), and the double-axis motor (510) is fixedly installed at the top center of the bottom frame (1) through a machine base.

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