CN111469010A

CN111469010A - Chair back arc angle automatic sander

Info

Publication number: CN111469010A
Application number: CN202010427930.0A
Authority: CN
Inventors: 刘益英
Original assignee: 刘益英
Current assignee: Foshan Shuang Long Furniture Co.,Ltd.
Priority date: 2020-05-20
Filing date: 2020-05-20
Publication date: 2020-07-31
Anticipated expiration: 2040-05-20
Also published as: CN111469010B

Abstract

The invention relates to a grinding machine, in particular to an automatic grinding machine for arc-shaped angles of a chair backrest. Therefore, the technical problems of the invention are as follows: the utility model provides a can fix not co-altitude chair, can evenly polish not co-altitude chair back arc angle, can also carry out the chair back arc angle automatic sander of collecting to the saw-dust that drops of polishing. The technical implementation scheme of the invention is as follows: an automatic grinding machine for arc angles of chair backrests comprises a second support, a supporting device, a first support and the like; the top of the second support is fixedly connected with a supporting device, the top end of the supporting device is provided with a first support, and the first support is 7-shaped. According to the invention, the second fixing block can be driven to rotate anticlockwise through unidirectional rotation of the chain, the second fixing block can continuously drive the sliding rail to move left and right and can drive the rechargeable polishing machine to move up and down to polish the arc-shaped angle on one side of the chair backrest, and the polishing position can be adjusted in the front, back, left and right directions.

Description

Chair back arc angle automatic sander

Technical Field

The invention relates to a grinding machine, in particular to an automatic grinding machine for arc-shaped angles of a chair backrest.

Background

The chair is a seat with a backrest and armrests, the chair is manufactured through a plurality of procedures of cutting, splicing, polishing, coloring and the like, and when the chair is manufactured in a furniture factory, workers generally need to polish the arc-shaped angle of the backrest of the chair.

Present workman generally all keeps flat subaerial with the chair earlier, keep flat subaerial back when the workman with the chair, the workman need hug closely abrasive paper on chair back arc angle, the workman need manually change abrasive paper in the position of chair back arc angle always afterwards, thereby abrasive paper just can polish chair back arc angle, although abrasive paper can polish chair back arc angle, nevertheless efficiency of polishing is lower, the workman uses abrasive paper to polish the in-process chair that back arc angle was polished and can remove, and the manual condition of polishing inhomogeneous appearance that still can appear of polishing of workman.

To the problem that exists at present, we design one kind and can fix not co-altitude chair, can evenly polish not co-altitude chair back arc angle, can also carry out the polisher collected to the saw-dust that drops of polishing.

Disclosure of Invention

In order to overcome the defects that when a worker uses abrasive paper to polish an arc-shaped angle of a backrest of a chair, the chair can move and the arc-shaped angle of the backrest is not uniformly polished, the technical problem of the invention is as follows: the utility model provides a can fix not co-altitude chair, can evenly polish not co-altitude chair back arc angle, can also carry out the chair back arc angle automatic sander of collecting to the saw-dust that drops of polishing.

The technical implementation scheme of the invention is as follows: an automatic sander for chair back arc corners, comprising:

the splayed second support is placed on the ground, the top of the splayed second support is fixedly connected with a supporting device, the top end of the supporting device is provided with a first support, and the first support is 7-shaped;

the fixed subassembly, it is installed in the first support lower part of keeping away from strutting arrangement one side, and first support top is equipped with adjusting device, and adjusting device's top rigid coupling has first slide bar, and first sliding sleeve suit is on first slide bar, and the rotation type is equipped with first fastener on the first sliding sleeve lateral wall, and first fastener tip and first slide bar contact fit have a burnishing device on keeping away from the first sliding sleeve of first fastener one side, and burnishing device is located the top of fixed subassembly.

Preferably, the supporting device comprises a third support, a second sliding block, a supporting rod, a first fixing block and a second fastening assembly, the third support is fixedly connected to the top of the second support, the second sliding block is arranged on the inner side of the upper portion of the third support in a sliding mode, the supporting rod is welded to the top of the second sliding block, the first support is connected to the top of the supporting rod in a sliding mode, the first fixing block is installed at the top of the third support far away from one side of the first support, the second fastening assembly is arranged in the first fixing block in a rotating mode, and the end portion of the second fastening assembly is in contact fit with the supporting rod.

Preferably, the fixing assembly comprises a first clamping plate, a first sliding block, a second clamping plate and a screw rod, the lower portion of the first support far away from one side of the second fastening assembly is rotatably provided with the screw rod, the screw rod is connected with the first sliding block in a threaded connection mode, the first sliding block is located in the lower portion of the first support, the side wall of the first sliding block far away from one side of the second fastening assembly is fixedly connected with the second clamping plate, the first support above the second clamping plate is welded with the first clamping plate, and the bottom plate can be clamped tightly by the second clamping plate and the first clamping plate in a matched mode.

Preferably, the adjusting device comprises a fourth sliding rod, a third sliding sleeve, a third fastener, a fifth sliding rod, a fourth sliding sleeve and a fourth fastener, the fourth sliding rod is fixedly connected to the top of the first support, the third sliding sleeve is slidably arranged on the fourth sliding rod, the third fastener penetrates through the middle of the third sliding sleeve, the end of the third fastener is in contact fit with the fourth sliding rod, the fifth sliding rod is welded to the top of the third sliding sleeve and extends along the length direction of the first clamping plate, the fourth sliding sleeve is slidably arranged on the fifth sliding rod, the fourth fastener penetrates through the side wall of the fourth sliding sleeve, and the fourth fastener is in contact fit with the fifth sliding rod.

Preferably, the polishing device comprises a shell, a speed reducing motor, a fourth support, a rotating shaft, a chain, a transmission assembly, a chain wheel and a polishing assembly, wherein the shell is welded on the side wall of the first sliding sleeve at one side far away from the first fastener, the speed reducing motor is installed at the top of the shell at one side close to the first sliding sleeve through a bolt, the fourth support is fixedly connected to two sides of the inner wall of the shell, the rotating shaft is arranged at the inner end part of the fourth support, the chain wheel is installed on the rotating shaft, the chain is wound between the chain wheels at two sides, the transmission assembly is connected between the chain wheel below the speed reducing motor and an output shaft of the speed reducing motor, the polishing assembly is installed in the shell in a sliding manner and is connected with the chain in a rotating manner, the polishing assembly comprises a second sliding rod, a second sliding sleeve, a sliding rail, a third, be connected with the second slide bar between the shell inner wall top, the gliding style is equipped with the second sliding sleeve on the second slide bar, the welding of second sliding sleeve bottom has the slide rail, the slidingtype is equipped with the third slider in the slide rail, the rigid coupling has the second fixed block on the sprocket, the second fixed block lateral wall that is close to slide rail one side is connected with the third slider rotary type, be connected with the third slide bar on the third slider, the gliding style cover is equipped with the third fixed block on the third slide bar, be connected with the spring between the middle part of third fixed block top and third slide bar, equal rigid coupling has the fifth support on the two walls of third fixed block, install rechargeable burnishing machine through the bolt between the fifth.

Preferably, the collecting device comprises a sixth support and a collecting frame, the sixth support is welded to the two sides of the first support above the first clamping plate, and the collecting frame is symmetrically connected to the top of the sixth support through bolts.

Compared with the prior art, the invention has the following advantages:

1. the chair bottom plates with different heights can be quickly fixed by screwing the supporting device and the fixing assembly to move up and down, and the operation is convenient.

2. The second fixing block can be driven to rotate anticlockwise through unidirectional rotation of the chain, the second fixing block can continuously drive the sliding rail to move left and right and can drive the rechargeable polishing machine to move up and down to polish the arc-shaped angle on one side of the chair backrest.

3. The polishing device capable of shifting is capable of being quickly and finely adjusted through the front and back movement or the left and right movement of the adjusting device, and is convenient and quick.

4. Can polish the saw-dust that drops to burnishing device through collection device and collect to can effectually alleviate workman's the burden of cleaning.

Drawings

Fig. 1 is a first front view structure diagram of the present invention.

Fig. 2 is a front view of the fixing assembly and the supporting device of the present invention.

FIG. 3 is a schematic front view of a polishing apparatus according to the present invention.

FIG. 4 is a schematic front view of a polishing assembly of the present invention.

Fig. 5 is a schematic view of a second front view structure according to the present invention.

Fig. 6 is a schematic front view of the adjusting device of the present invention.

Fig. 7 is a schematic front view of the collecting device of the present invention.

The meaning of the reference symbols in the figures: 1. wooden legs, 2, a bottom plate, 3, a backrest plate, 4, a fixing component, 5, a first support, 6, a second support, 7, a supporting device, 8, a first sliding rod, 9, a first sliding sleeve, 10, a first fastener, 11, a polishing device, 41, a first clamping plate, 42, a first sliding block, 43, a second clamping plate, 44, a screw rod, 71, a third support, 72, a second sliding block, 73, a support rod, 74, a first fixing block, 75, a second fastening component, 111, a shell, 112, a speed reducing motor, 113, a fourth support, 114, a rotating shaft, 115, a chain, 116, a transmission component, 117, a chain wheel, 118, a polishing component, 1181, a second sliding rod, 1182, a second sliding sleeve, 1183, a sliding rail, 1184, a third sliding block, 1185, a second fixing block, 1186, a third sliding rod, 1187, a third sliding rod, 1188, a spring, a fixing block, a fifth polishing machine, a support 10, a 13, and an adjusting device, 131. fourth slide bar, 132, third sliding sleeve, 133, third fastener, 134, fifth slide bar, 135, fourth sliding sleeve, 136, fourth fastener, 12, collecting device, 121, sixth support, 122, collecting frame.

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.

Example 1

An automatic grinding machine for arc angles of chair backrests is disclosed, as shown in fig. 1-6, and comprises a fixed assembly 4, a first support 5, a second support 6, a supporting device 7, a first sliding rod 8, a first sliding sleeve 9, a first fastener 10, a polishing device 11 and an adjusting device 13, wherein the supporting device 7 is arranged at the top of the second support 6, the first support 5 is welded at the top end of the supporting device 7, the fixed assembly 4 is installed at the lower part of the right side of the first support 5, the fixed assembly 4 can tightly clamp a chair bottom plate 2, the adjusting device 13 is installed at the top of the first support 5, the first sliding rod 8 is fixedly connected to the top of the adjusting device 13, the first sliding sleeve 9 is slidably arranged on the first sliding rod 8, the first fastener 10 is rotatably arranged on the left side of the first sliding sleeve 9, the right end of the first fastener 10 is in contact with the left side of the first sliding rod 8, and.

When a worker needs to polish the arc angle at one side of the chair backboard 3, the worker firstly adjusts the height of the first support 5 through the supporting device 7 according to the height of the chair bottom plate 2, so as to adjust the height of the fixing component 4, when the height of the fixing component 4 and the height of the chair bottom plate 2 are positioned at the same level, the worker can move the chair bottom plate 2 into the fixing component 4 and fix the chair bottom plate 2 through the fixing component 4, after the fixing component 4 fixes the chair bottom plate 2, the worker twists the first fastening piece 10 anticlockwise, the right end of the first fastening piece 10 rotates anticlockwise can be separated from the left side of the first slide bar 8 temporarily, then the worker can adjust the position of the first sliding sleeve 9 on the first slide bar 8 up and down according to the requirement of the polishing height, the first sliding sleeve 9 moves up and down to drive the polishing device 11 to move up and down, when the worker adjusts the polishing device 11 to be consistent with the height of the arc angle at one side of the chair, the worker needs to turn the first fastening piece 10 clockwise again, the right end of the first fastening piece 10 rotates clockwise to contact the left side of the first sliding rod 8, then the first sliding sleeve 9 and the polishing device 11 can be fixed on the first sliding rod 8, and then the worker can enable the polishing device 11 to adjust the polishing position in the front-back left-right direction through the adjusting device 13 according to the polishing needs, so that the arc-shaped angle position of the polishing device 11 on one side of the chair back plate 3 is more accurate. After the worker manually adjusts the polishing position of the polishing device 11, the worker can start the polishing device 11 to polish the arc angle on one side of the chair backrest plate 3, after the polishing device 11 finishes polishing the arc-shaped angle on one side of the chair backboard 3, a worker can close the polishing device 11, the polishing device 11 can temporarily stop polishing the arc-shaped angle on one side of the chair backboard 3, then the worker needs to turn the fixing component 4 counterclockwise, the fixing component 4 can temporarily stop clamping the chair bottom board 2, then the worker takes out the chair between the fixing components 4 manually, the worker finishes the polishing work of the arc-shaped angle at one side of the backrest plate 3 of the chair, when the workman still need polish the arc angle of the opposite side of chair backboard 3, the workman need manually overturn the chair, the workman overturns the chair for the position of polishing of changing chair arc angle, workman repeated above-mentioned operation can polish the arc angle of chair backboard 3 both sides.

Example 2

The utility model provides an automatic polisher of chair back arc angle, as shown in fig. 1, fig. 2 and fig. 5, strutting arrangement 7 is including third support 71, second slider 72, branch 73, first fixed block 74 and second fastening subassembly 75, the rigid coupling has third support 71 in the middle of the second support 6 top, third support 71 upper portion slidingtype is equipped with second slider 72, second slider 72 top is equipped with branch 73, the top welding of branch 73 has first support 5, first fixed block 74 is installed on third support 71 top left side, first fixed block 74 internal rotation formula is equipped with second fastening subassembly 75, second fastening subassembly 75 right-hand member and the left side contact of branch 73.

The fixing assembly 4 comprises a first clamping plate 41, a first sliding block 42, a second clamping plate 43 and a screw rod 44, the screw rod 44 is rotatably arranged on the lower portion of the right side of the first support 5, the first sliding block 42 is slidably arranged on the screw rod 44, the second clamping plate 43 is fixedly connected to the right side of the first sliding block 42, the first clamping plate 41 is welded on the lower portion of the right side of the first support 5, the first clamping plate 41 is located above the second clamping plate 43, and the first clamping plate 41 and the second clamping plate 43 are matched to clamp and fix one side of the chair bottom plate 2.

When a worker needs to polish the arc-shaped angle on one side of the chair backrest plate 3, the worker needs to turn the second fastening component 75 counterclockwise, when the second fastening component 75 rotates counterclockwise until the left side of the right-end supporting rod 73 is separated temporarily, the second fastening component 75 will not fix the supporting rod 73 temporarily, then the worker can manually move the supporting rod 73 up and down, the supporting rod 73 moves up and down to drive the first support 5 to move up and down, the first support 5 moves up and down to drive the fixing component 4 to move up and down, when the fixing component 4 moves up and down to the same horizontal plane as the height of the chair bottom plate 2, the worker can turn the second fastening component 75 clockwise, when the right end of the second fastening component 75 rotates counterclockwise and contacts with the left side of the supporting rod 73, the second fastening component 75 can fix the supporting rod 73 again, and after the supporting rod 73 is fixed, the fixing component 4 can stop, thus, the chair bottom plates 2 with different heights can be fixed.

When a worker manually adjusts the height of the fixing assembly 4 and needs to clamp the chair bottom plate 2, the worker firstly needs to insert the chair bottom plate 2 between the first clamping plate 41 and the second clamping plate 43, and the top of the chair bottom plate 2 contacts with the first clamping plate 41, then the worker can rotate the screw rod 44 clockwise, the screw rod 44 rotates clockwise to drive the first slider 42 to move upwards, the first slider 42 moves upwards to drive the second clamping plate 43 to move upwards, when the top of the second clamping plate 43 moves upwards to be closely attached to the bottom of the chair bottom plate 2, the worker can temporarily stop rotating the screw rod 44 clockwise, the first clamping plate 41 and the second clamping plate 43 can fix the chair bottom plate 2, when the polishing device 11 finishes polishing the arc-shaped angle on one side of the chair back plate 3, and the worker needs to change the polishing position of the arc-shaped angle of the chair back plate 3, the worker can manually rotate the screw rod 44 anticlockwise, the screw 44 rotates anticlockwise to drive the first slider 42 to move downwards, the first slider 42 moves downwards to drive the second clamping plate 43 to move downwards, the second clamping plate 43 moves downwards to the position where the first clamping plate 41 and the second clamping plate 43 are not separated from the bottom of the chair bottom plate 2 temporarily, a worker can manually pull out the first clamping plate 41 and the second clamping plate 43, and the worker can fix the chair bottom plate 2 by repeating the steps, so that the operation is convenient.

Example 3

An automatic grinding machine for arc angles of chair backrests is disclosed, as shown in fig. 1, fig. 3, fig. 4, fig. 5 and fig. 6, an adjusting device 13 comprises a fourth sliding rod 131, a third sliding sleeve 132, a third fastening piece 133, a fifth sliding rod 134, a fourth sliding sleeve 135 and a fourth fastening piece 136, the top of a first support 5 is fixedly connected with the fourth sliding rod 131, the fourth sliding rod 131 is slidably provided with the third sliding sleeve 132, the middle part of the front side of the third sliding sleeve 132 is provided with the third fastening piece 133 in a penetrating manner, the rear end of the third fastening piece 133 is in contact with the front side of the fourth sliding rod 131, the top of the third sliding sleeve 132 is fixedly connected with the fifth sliding rod 134, the fifth sliding rod 134 is slidably provided with the fourth sliding sleeve 135, the left side of the fourth sliding sleeve 135 is rotatably provided with the fourth fastening piece 136 in a penetrating manner, and the right end of the.

The polishing device 11 comprises a housing 111, a speed reducing motor 112, a fourth support 113, a rotating shaft 114, a chain 115, a transmission assembly 116, a chain wheel 117 and a polishing assembly 118, the housing 111 is welded on the right side of the first sliding sleeve 9, the speed reducing motor 112 is installed on the left side of the top of the housing 111 through bolts, the fourth support 113 is welded on the left wall and the right wall in the housing 111, the rotating shaft 114 is rotatably arranged on the inner side of the fourth support 113, the chain wheel 117 is fixedly connected on the rotating shaft 114 on the left side and the right side, the chain 115 is wound between the chain wheels 117 on the left side and the right side, the transmission assembly 116 is connected on the front side of the chain wheel 117 on the left side and the output shaft of the speed reducing motor 112, the polishing assembly 118 is slidably matched in the housing 111, the polishing assembly 118 comprises a second sliding rod 1181, a second sliding sleeve 1182, a sliding rail 1183, a third sliding block 1184, a second fixed block 1185, a third sliding, a second sliding bar 1181 is fixedly connected between the left side and the right side of the inner top of the shell 111, a second sliding sleeve 1182 is slidably arranged on the second sliding bar 1181, a sliding rail 1183 is connected to the bottom of the second sliding sleeve 1182, a third sliding block 1184 is slidably arranged in the sliding rail 1183, a second fixing block 1185 is fixedly connected to the front side of the chain 115, the front side of the second fixing block 1185 is rotatably connected to the rear side of the third sliding block 1184, a third sliding bar 1186 is connected to the front side of the third sliding block 1184, a third fixing block 1187 is slidably arranged on the third sliding bar 1186, a spring 1188 is connected between the top of the third fixing block 1187 and the middle of the third sliding bar 1186, fifth supporting seats 1189 are respectively installed on the front side and the rear side of the third fixing block 1187, and the lower portion.

When a worker needs to grind the arc-shaped angle of the chair back plate 3, the worker twists the third fastening member 133 counterclockwise, the rear end of the third fastening member 133 rotated counterclockwise moves forward to be temporarily separated from the front side of the fourth sliding bar 131, the worker moves the third sliding sleeve 132 left and right to adjust the left and right grinding positions of the polishing device 11, after the worker adjusts the left and right grinding positions of the polishing device 11, the worker twists the third fastening member 133 clockwise, the rear end of the third fastening member 133 rotated clockwise comes into contact with the front side of the fourth sliding bar 131, the third sliding sleeve 132 is fixed on the fourth sliding bar 131, the worker can temporarily stop twisting the third fastening member 133, the worker can reversely twist the fourth fastening member 136 clockwise, the right end of the fourth fastening member 136 rotated counterclockwise can temporarily separate from the left side of the fifth sliding bar 134, and the fourth sliding sleeve 135 can slide back and forth on the fifth sliding bar 134, the polishing position of the polishing device 11 can be adjusted by moving the fourth sliding sleeve 135 back and forth, when the worker adjusts the polishing position of the polishing device 11 back and forth, the worker can turn the fourth fastening member 136 clockwise, the right end of the fourth fastening member 136 rotating clockwise can be in contact with the left side of the fifth sliding rod 134, the fourth sliding sleeve 135 is fixed on the fifth sliding rod 134, the worker needs to stop turning the fourth fastening member 136 temporarily, and the worker can manually adjust the position of the polishing device 11 according to the polishing position of the arc angle of the chair backrest plate 3.

When the fixing assembly 4 clamps the chair bottom plate 2, and a worker needs to polish the arc-shaped angle on one side of the chair back plate 3, the worker needs to start the deceleration motor 112 to rotate counterclockwise, the output shaft of the deceleration motor 112 rotates counterclockwise to drive the sprocket 117 to rotate counterclockwise through the transmission assembly 116, the sprocket 117 rotates counterclockwise to drive the chain 115 to rotate counterclockwise, the second sliding sleeve 1182 is driven by the chain 115 to move left and right on the second sliding rod 1181 through the sliding rail 1183, and the worker controls the charging type polishing machine 11810 to rotate to start polishing, because the charging type polishing machine 11810 polishes the arc-shaped angle of the chair back plate 3, the charging type arc-shaped angle of the chair back plate 3 is different in height, when the charging type polishing machine 11810 polishes to a certain height, the third fixing block 1187 moves upward, the spring 1188 is compressed, and the charging type polishing machine 11810 and the third fixing block 1187 can slide up and down on the third sliding rod, the rechargeable polishing machine 11810 can adapt to the polishing work of the arc corners of the chair back boards 3 with different heights, so that the rechargeable polishing machine can be tightly attached to the arc corners of the chair back boards, and the arc corners of the back boards can be fully polished.

Example 4

The utility model provides a chair back arc angle automatic sander, as shown in fig. 7, still including collection device 12, collection device 12 is including sixth support 121 and collection frame 122, and collection device 12 is installed to first support 5 right side, and both sides all have welded sixth support 121 around first support 5 right side upper portion, and the top of sixth support 121 all has collection frame 122 through the bolt rigid coupling, collects the top that frame 122 is located first splint 41.

A large amount of sawdust generated by grinding the arc-shaped angle of the backrest of the chair floats to the ground, which is easy to clean workers and cause burden. Therefore, when the bottom plate 2 of the chair is fixed, when the backboard 3 is located between the collecting frames 122 at both sides, the chips falling down by the polishing device 11 automatically fall into the collecting frames 122 at both front and rear sides, when more chips are loaded in the collecting frames 122, a worker needs to rotate the bolt counterclockwise, the worker can manually remove the collecting frame 122 at the top of the sixth support 121 when the worker rotates the top end of the bolt counterclockwise to temporarily stop fixing the collecting frame 122 at the top of the sixth support 121, then the worker pours the chips of the collecting frame 122 to a designated position, after the chips in the collecting frame 122 are completely poured out by the worker, the worker needs to put the collecting frame 122 back to the top of the sixth support 121, then the worker rotates the bolt clockwise, the bolt can fix the collecting frame 122 at the top of the sixth support 121 again by rotating the bolt clockwise, the collecting frame 122 can collect the chips falling down by the polishing device 11, so need not the workman and clean ground, labour saving and time saving, and dismantle the convenience.

Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.

Claims

1. The utility model provides a chair back arc angle automatic sander, characterized by includes:

the second support (6) is placed on the ground and is in a splayed shape, the top of the second support (6) is fixedly connected with a supporting device (7), the top end of the supporting device (7) is provided with the first support (5), and the first support (5) is in a 7-shaped shape;

fixed subassembly (4), it installs in first support (5) lower part of keeping away from strutting arrangement (7) one side, first support (5) top is equipped with adjusting device (13), the top rigid coupling of adjusting device (13) has first slide bar (8), first sliding sleeve (9) suit is on first slide bar (8), the rotation type is equipped with first fastener (10) on first sliding sleeve (9) lateral wall, first fastener (10) tip and first slide bar (8) contact cooperation, it has burnishing device (11) to keep away from welding on first sliding sleeve (9) of first fastener (10) one side, burnishing device (11) are located the top of fixed subassembly (4).

2. The automatic sander of chair back arc corners as set forth in claim 1, wherein: strutting arrangement (7) is including third support (71), second slider (72), branch (73), first fixed block (74) and second fastening components (75), the top rigid coupling of second support (6) has third support (71), third support (71) upper portion inboard sliding type is equipped with second slider (72), the top welding of second slider (72) has branch (73), the top sliding connection of branch (73) has first support (5), keep away from third support (71) top of first support (5) one side and install first fixed block (74), first fixed block (74) internal rotation formula is equipped with second fastening components (75), the tip and branch (73) contact cooperation of second fastening components (75).

3. The automatic sander of chair back arc corners as set forth in claim 2, wherein: fixed subassembly (4) is including first splint (41), first slider (42), second splint (43) and lead screw (44), keep away from first support (5) lower part rotary type of second fastening assembly (75) one side and be equipped with lead screw (44), be connected with first slider (42) through threaded connection's mode on lead screw (44), first slider (42) are located first support (5) below, the rigid coupling has second splint (43) on keeping away from first slider (42) lateral wall of second fastening assembly (75) one side, the welding has first splint (41) on first support (5) of second splint (43) top, second splint (43) can press from both sides bottom plate (2) with first splint (41) cooperation.

4. The automatic sander of chair back arc corners as set forth in claim 3, wherein: the adjusting device (13) comprises a fourth sliding rod (131), a third sliding sleeve (132), a third fastener (133), a fifth sliding rod (134), a fourth sliding sleeve (135) and a fourth fastener (136), the top of the first support (5) is fixedly connected with a fourth sliding rod (131), the fourth sliding rod (131) is slidably provided with a third sliding sleeve (132), a third fastener (133) penetrates through the middle of the third sliding sleeve (132), the end of the third fastener (133) is in contact fit with the fourth sliding rod (131), a fifth sliding rod (134) is welded to the top of the third sliding sleeve (132), the fifth sliding rod (134) extends along the length direction of the first clamping plate (41), the fifth sliding rod (134) is slidably provided with a fourth sliding sleeve (135), a fourth fastener (136) penetrates through the side wall of the fourth sliding sleeve (135), and the fourth fastener (136) is in contact fit with the fifth sliding rod (134).

5. The automatic sander of chair back arc corners as set forth in claim 4, wherein: the polishing device (11) comprises a shell (111), a speed reducing motor (112), a fourth support (113), a rotating shaft (114), a chain (115), a transmission component (116), a chain wheel (117) and a polishing component (118), wherein the shell (111) is welded on the side wall of the first sliding sleeve (9) far away from one side of the first fastener (10), the speed reducing motor (112) is installed at the top of the shell (111) close to one side of the first sliding sleeve (9) through bolts, the fourth support (113) is fixedly connected to two sides of the inner wall of the shell (111), the rotating shaft (114) is arranged at the inner side end of the fourth support (113), the chain wheel (117) is installed on the rotating shaft (114), the chain wheel (115) is wound between the chain wheels (117) on two sides, the transmission component (116) is connected between the chain wheel (117) below the speed reducing motor (112) and an output shaft of the speed reducing motor (112, the polishing assembly (118) is rotatably connected with the chain (115), the polishing assembly (118) comprises a second sliding rod (1181), a second sliding sleeve (1182), a sliding rail (1183), a third sliding block (1184), a second fixed block (1185), a third sliding rod (1186), a third fixed block (1187), a spring (1188), a fifth support (1189) and a charging type polishing machine (11810), the second sliding rod (1181) is connected between the upper portions of the inner walls of the shell (111), the second sliding sleeve (1182) is slidably arranged on the second sliding rod (1181), the sliding rail (1183) is welded at the bottom of the second sliding sleeve (1182), the third sliding block (1184) is slidably arranged in the sliding rail (1183), the second fixed block (1185) is fixedly connected to the chain wheel (117), the side wall of the second fixed block (1185) close to one side of the sliding rail (1183) is rotatably connected with the third sliding block (1184), and the third sliding rod (1186) is connected to the third sliding block (, a third fixing block (1187) is slidably sleeved on the third sliding rod (1186), a spring (1188) is connected between the top of the third fixing block (1187) and the middle of the third sliding rod (1186), fifth supports (1189) are fixedly connected to two walls of the third fixing block (1187), and a charging type polishing machine (11810) is installed between the middle parts of the fifth supports (1189) through bolts.

6. The automatic sander of chair back arc corners as set forth in claim 5, wherein: still including collection device (12), collection device (12) are including sixth support (121) and collection frame (122), and first support (5) both sides of first splint (41) top all weld sixth support (121), and the top of sixth support (121) all has collection frame (122) through bolt symmetric connection.