CN219219555U - Dual controller for thickness and plate thickness of floor slab reinforcement protection layer - Google Patents

Abstract

The utility model provides a double controller for the thickness and the thickness of a floor slab reinforcement protection layer, which relates to the technical field of constructional engineering and comprises the following components: a lower layer gasket; two support columns are symmetrically and fixedly connected to the top end surface of the lower-layer gasket; both support columns are of circular columnar structures; a sliding column is centrally and slidably connected in the top end surfaces of the two support columns; the top end surfaces of the two sliding columns are fixedly connected with an upper layer gasket; the upper layer gasket and the lower layer gasket are both circular columnar structures made of concrete. Placing the bottom plate reinforcing bar in the mount makes the bottom plate reinforcing bar push down control traveller and drives the connection pendulum rod and rotate and drive auxiliary rotating shaft and slide at the direction spout through the rotation of connecting the pendulum rod and then make the clamping frame inwards slide simultaneously and carry out spacing fixedly to the bottom plate reinforcing bar, solved the in-process that fixes dual controller need the staff to carry out wire ligature operation comparatively complicated to every dual controller in proper order.

Description

Dual controller for thickness and plate thickness of floor slab reinforcement protection layer

Technical Field

The utility model relates to the technical field of constructional engineering, in particular to a double controller for the thickness and the thickness of a floor slab reinforcement protection layer.

Background

Before concrete floor pours, generally need unsettled two-layer reinforcing bar about setting to improve the intensity of floor, in order to conveniently control floor reinforcement protective layer thickness and board thickness, the staff can use dual controller, and current dual controller comprises upper and lower gasket and bracing piece generally, pours the concrete floor, fills up between lower floor reinforcing bar and pouring the face and between upper and lower floor reinforcing bar and establishes upper and lower gasket, then supports upper and lower gasket through the bracing piece and fix required reinforcement protective layer thickness and board thickness has been reached.

For example: the utility model with the application number of CN202022889577.6 discloses a precast concrete block for controlling the thickness of a floor slab and a reinforcement protection layer, which comprises an upper concrete block and a lower concrete block, wherein the upper side of the lower concrete block is provided with a lower layer reinforcement supporting surface for supporting reinforcement, the upper side of the upper concrete block is provided with an upper layer reinforcement supporting surface for supporting reinforcement, and the upper concrete block is installed on the lower concrete block in a clearance manner with adjustable upper and lower positions. The utility model adopts adjustable bolt connection between the upper concrete block and the lower concrete block, thereby being capable of adjusting the distance between the upper concrete block and the lower concrete block on line, further adjusting the thickness of the floor slab concrete and the gap between the upper layer steel bar and the lower layer steel bar, and improving the universality of the concrete blocks.

However, for the present traditional dual controller, after the dual controller is used to fix the distance between the upper layer and the lower layer of steel bars, in order to prevent the dual controller from deviating in the casting process, the worker usually uses the wire tying to fix the dual controller and the steel bars of the bottom plate, but the dual controller is usually arranged in a large amount in the use process, and in the fixing process of the dual controller, the worker needs to tie the wire tying to each dual controller in sequence, so that the operation is complex, and the labor intensity of the worker is high.

Disclosure of Invention

In view of the above, the utility model provides a dual controller for the thickness and the plate thickness of a floor reinforcing steel bar protection layer, which is provided with a fixing frame which can facilitate a worker to quickly fix the dual controller and a floor reinforcing steel bar, a locking screw is rotated to drive a locking block to slide in a sliding groove, when the locking block slides outwards in the sliding groove, the worker can push a reinforcing rod to enable two mounting frames to slide along a sliding column, the worker can conveniently adjust the fixing height of the floor reinforcing steel bar, the locking screw is reversely rotated after the position of the mounting frame is adjusted to enable the locking block to be in contact with the inner wall of the sliding groove, the friction force between the mounting frame and the sliding column is increased through the locking block, the position of the mounting frame is further fixed, the floor reinforcing steel bar is placed in the fixing frame after the fixing height of the floor reinforcing steel bar is adjusted, the floor reinforcing steel bar can be pressed down to control the sliding column to enable the sliding column to slide in the fixing frame and squeeze a reset spring, the sliding rod can be driven to rotate along with the sliding of the locking sliding column, the connecting swing rod is driven to slide in the guiding chute through the rotation of the connecting swing rod, and the auxiliary rotating shaft can enable the clamping frame to slide inwards simultaneously to fix the floor reinforcing steel bar, the floor reinforcing steel bar is convenient to be used, and the dual controller is not convenient to use, and the dual controller is convenient to fix the reinforcing steel bar and the floor reinforcing steel bar is not required to be used.

The utility model provides a double controller for the thickness and the plate thickness of a floor slab reinforcement protection layer, which specifically comprises the following steps: a lower layer gasket; two support columns are symmetrically and fixedly connected to the top end surface of the lower-layer gasket; both support columns are of circular columnar structures; a sliding column is centrally and slidably connected in the top end surfaces of the two support columns; the top end surfaces of the two sliding columns are fixedly connected with an upper layer gasket; the upper layer gasket and the lower layer gasket are both circular columnar structures made of concrete; the outer walls of the two sliding columns are both connected with a mounting frame in a sliding manner; the rear parts of the two mounting frames are fixedly connected with a reinforcing rod; the left end faces of the two support columns and the right end faces of the two support columns are respectively provided with a sliding groove.

Optionally, a control screw is rotatably connected with the top end surface of the lower-layer gasket in the middle; the upper part of the control screw is in threaded connection with the upper layer gasket; an auxiliary plate is fixedly connected with the top end surface of the control screw.

Optionally, the front parts of the left end surfaces of the two mounting frames and the front parts of the right end surfaces of the two mounting frames are respectively and rotatably connected with a locking screw rod; the tail ends of the two locking screws are fixedly connected with a locking block; the two blocks are respectively and movably connected in the two sliding grooves.

Optionally, the left end face of the reinforcing rod and the right end face of the reinforcing rod are both rotationally connected with a rotating frame through a connecting rotating shaft; the top end surfaces of the two rotating frames are fixedly connected with a fixing frame.

Optionally, a limiting inserted rod is inserted into each of the two connecting rotating shafts; two mounting plates are symmetrically and fixedly connected to the rear part of the outer wall of the reinforcing rod; the two limit inserted bars are respectively and slidably connected in the two mounting plates; the rear parts of the outer walls of the two limiting inserted bars are fixedly connected with a connecting plate; the front end surfaces of the two connecting plates are provided with a group of supporting springs; the tail ends of the two groups of supporting springs are respectively and fixedly connected to the rear end surfaces of the two mounting plates.

Optionally, a mounting groove is formed in each of the two fixing frames; the bottom end surfaces of the two mounting grooves are provided with a telescopic chute at the middle; the top end surfaces of the two telescopic sliding grooves are fixedly connected with a reset spring; the top end surfaces of the two reset springs are fixedly connected with a control sliding column; the two control sliding columns are respectively and slidably connected in the two fixing frames; a group of connecting swing rods are symmetrically and rotationally connected in the two mounting grooves; the tail ends of the two groups of connecting swing rods are respectively and rotatably connected to the lower parts of the outer walls of the two control slide columns; the head ends of the two groups of connecting swing rods are respectively connected with a clamping frame through an auxiliary rotating shaft in a rotating way; a group of guide sliding grooves are symmetrically formed in the upper parts of the two mounting grooves; the two groups of auxiliary rotating shafts are respectively and slidably connected in the two groups of guide sliding grooves.

Advantageous effects

The utility model can facilitate the staff to quickly limit and fix the double controller and the bottom plate reinforcing steel bar without using a binding wire binding mode, has simple and convenient operation, is more convenient to use, reduces the labor intensity of the staff, and can facilitate the staff to adjust the distance between the lower layer gasket and the upper layer gasket according to the use requirement, thereby facilitating the staff to control the thickness of the reinforcing steel bar protection layer and the plate thickness of the floor and improving the universality of the double controller.

In addition, rotate the accessory plate and make the accessory plate drive control screw and rotate, drive upper gasket through control screw's rotation and reciprocate, the in-process that upper gasket reciprocated can drive the slip post and slide for upper gasket at the support column provides the direction, the setting of accessory plate can prevent that upper gasket from breaking away from control screw simultaneously, the distance between lower floor's gasket and the upper gasket is adjusted according to the use needs to the upper gasket's that reciprocates convenience staff in the job site, make things convenient for staff control reinforcement protective layer thickness and floor's thick, improve dual controller's commonality.

In addition, drive the locking piece through rotating locking screw rod and slide in the sliding tray, when the locking piece outwards slides in the sliding tray, the staff can promote the stiffener and make two mounting brackets slide along the slip post, make things convenient for the staff to adjust the fixed height of bottom plate reinforcing bar, reverse rotation locking screw rod makes the locking piece contact with the inner wall of sliding tray after adjusting the position of mounting bracket, increase the frictional force between mounting bracket and the slip post through the locking piece, and then fix the position of mounting bracket.

In addition, place the mount with the bottom plate reinforcing bar in the fixed height back of adjusting the bottom plate reinforcing bar, the bottom plate reinforcing bar pushes down the control strut and makes the control strut slide and extrude reset spring in the mount this moment, can drive the connection pendulum rod along with the slip of control strut and rotate, drive auxiliary rotating shaft and slide at the direction spout through the rotation of connection pendulum rod, and then make the clamping frame inwards slide simultaneously and carry out spacing fixed to the bottom plate reinforcing bar, easy operation is convenient, it is more convenient to use, need not use the wire ligature to fix dual controller and bottom plate reinforcing bar, reduce staff's intensity of labour.

Drawings

In order to more clearly illustrate the technical solution of the embodiments of the present utility model, the drawings of the embodiments will be briefly described below.

In the drawings:

FIG. 1 is a schematic diagram of an axial structure of the present utility model.

Fig. 2 is a schematic diagram of the left-hand isometric structure of the utility model.

Fig. 3 is an enlarged schematic view of the structure of fig. 2 at a in accordance with the present utility model.

FIG. 4 is a schematic illustration of the axial structure of the reinforcing bar of the present utility model.

Fig. 5 is an enlarged schematic view of the structure of fig. 4 at B according to the present utility model.

Fig. 6 is a schematic cross-sectional view of the holder of the present utility model.

FIG. 7 is a schematic diagram of a sectional axial structure of a holder according to the present utility model.

Fig. 8 is an enlarged schematic view of the structure of fig. 7 at C according to the present utility model.

List of reference numerals

1. A lower layer gasket; 101. a support column; 102. a sliding column; 103. an upper layer gasket; 104. a control screw; 105. an auxiliary plate; 106. a sliding groove; 107. a mounting frame; 108. a locking screw; 109. a locking block; 110. a reinforcing rod; 111. the connecting rotating shaft; 112. a mounting plate; 113. a limit inserted link; 114. a connecting plate; 115. a support spring; 116. a rotating frame; 117. a fixing frame; 118. a mounting groove; 119. a telescopic chute; 120. a return spring; 121. connecting a swinging rod; 122. controlling a sliding column; 123. an auxiliary rotating shaft; 124. a guide chute; 125. and (5) clamping the frame.

Detailed Description

In order to make the objects, aspects and advantages of the technical solution of the present utility model more clear, the technical solution of the embodiment of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the specific embodiment of the present utility model. Unless otherwise indicated, terms used herein have the meaning common in the art. Like reference numerals in the drawings denote like parts.

Examples: please refer to fig. 1 to 8:

the utility model provides a double controller for the thickness and the plate thickness of a floor slab reinforcement protection layer, which comprises the following steps: a lower layer gasket 1;

two support columns 101 are symmetrically and fixedly connected to the top end surface of the lower-layer gasket 1; both support columns 101 are of a circular columnar structure; a sliding column 102 is centrally and slidably connected in the top end surfaces of the two support columns 101; the top end surfaces of the two sliding columns 102 are fixedly connected with an upper layer gasket 103; the upper layer gasket 103 and the lower layer gasket 1 are both circular columnar structures made of concrete; the outer walls of the two sliding columns 102 are both connected with a mounting frame 107 in a sliding manner; a reinforcing rod 110 is fixedly connected to the rear parts of the two mounting frames 107; a sliding groove 106 is respectively formed in the left end face of the two support columns 101 and the right end face of the two support columns 101.

In addition, according to the embodiment of the present utility model, as shown in fig. 1 and 2, a control screw 104 is rotatably connected to the top surface of the lower gasket 1; the upper part of the control screw 104 is in threaded connection with the upper gasket 103; the top end surface of the control screw 104 is fixedly connected with an auxiliary plate 105, so that the auxiliary plate 105 drives the control screw 104 to rotate through rotating the auxiliary plate 105, the upper layer gasket 103 is driven to move up and down through rotating the control screw 104, the sliding column 102 is driven to slide on the supporting column 101 to provide guidance for the upper layer gasket 103 in the process of moving up and down the upper layer gasket 103, the upper layer gasket 103 can be prevented from being separated from the control screw 104 through the arrangement of the auxiliary plate 105, the distance between the lower layer gasket 1 and the upper layer gasket 103 can be conveniently adjusted by a worker on a construction site according to use requirements through the up and down movement of the upper layer gasket 103, the worker can conveniently control the thickness of a reinforcing steel bar protection layer and the thickness of a floor slab, and the universality of the dual controller is improved.

In addition, according to the embodiment of the present utility model, as shown in fig. 2 and 3, a locking screw 108 is rotatably connected to the left end face of the two mounting frames 107 and the right end face of the two mounting frames 107, respectively; the tail ends of the two locking screw rods 108 are fixedly connected with a locking block 109; two respectively swing joint in two sliding tray 106 to drive locking piece 109 through rotating locking screw 108 and slide in sliding tray 106, when locking piece 109 outwards slides in sliding tray 106, the staff can promote stiffener 110 and make two mounting brackets 107 slide along slip post 102, makes things convenient for the staff to adjust the fixed height of bottom plate reinforcing bar, and back counter-rotating locking screw 108 makes locking piece 109 and the inner wall contact of sliding tray 106 after adjusting the position of mounting bracket 107, increases the frictional force between mounting bracket 107 and the slip post 102 through locking piece 109, and then fixes the position of mounting bracket 107.

Further, according to the embodiment of the present utility model, as shown in fig. 1 and 4, a rotating frame 116 is rotatably connected to both the left end surface of the reinforcing rod 110 and the right end surface of the reinforcing rod 110 through a connecting rotating shaft 111; the top end surfaces of the two rotating frames 116 are fixedly connected with a fixing frame 117, so that when the bottom plate reinforcing steel bars are fixed, the fixing frames 117 can rotate along the connecting rotating shaft 111 through the arrangement of the rotating frames 116, the fixing frames 117 can be conveniently attached to the bottom plate reinforcing steel bars in different shapes, and the practicability of the dual controller is improved.

In addition, according to the embodiment of the present utility model, as shown in fig. 4 and 5, a limiting plug rod 113 is inserted into each of the two connecting shafts 111; two mounting plates 112 are symmetrically and fixedly connected to the rear part of the outer wall of the reinforcing rod 110; the two limit inserting rods 113 are respectively and slidably connected in the two mounting plates 112; the rear parts of the outer walls of the two limiting inserted rods 113 are fixedly connected with a connecting plate 114; the front end surfaces of the two connecting plates 114 are respectively provided with a group of supporting springs 115; the ends of the two groups of support springs 115 are respectively and fixedly connected to the rear end surfaces of the two mounting plates 112, so that the connection rotating shaft 111 is limited and fixed through the limiting inserting rod 113, the connection rotating shaft 111 is prevented from rotating in the using process to enable the position of the fixing frame 117 to deviate, when the position of the fixing frame 117 needs to be rotated, the limiting inserting rod 113 is pulled only to enable the limiting inserting rod 113 to slide in the connection rotating shaft 111 and stretch the support springs 115, when the limiting inserting rod 113 is completely separated from the connection rotating shaft 111, a worker can rotate the fixing frame 117 to adjust the position of the fixing frame 117, and after adjustment is completed, the limiting inserting rod 113 is loosened to enable the limiting inserting rod 113 to reset along with rebound of the support springs 115 to be inserted into the connection rotating shaft 111 again to fix the position of the fixing frame 117.

In addition, according to the embodiment of the present utility model, as shown in fig. 6 and 8, one installation groove 118 is formed in each of the two fixing frames 117; a telescopic chute 119 is arranged at the center of the bottom end surfaces of the two mounting grooves 118; the top end surfaces of the two telescopic sliding grooves 119 are fixedly connected with a return spring 120; the top end surfaces of the two return springs 120 are fixedly connected with a control slide column 122; the two control slide posts 122 are respectively and slidably connected in the two fixing frames 117; a group of connecting swing rods 121 are symmetrically and rotatably connected in the two mounting grooves 118; the tail ends of the two groups of connecting swing rods 121 are respectively and rotatably connected to the lower parts of the outer walls of the two control slide columns 122; the head ends of the two groups of connecting swing rods 121 are respectively connected with a clamping frame 125 through an auxiliary rotating shaft 123 in a rotating way; a group of guide sliding grooves 124 are symmetrically formed in the upper parts of the two mounting grooves 118; two sets of auxiliary rotating shafts 123 are respectively connected in two sets of guide sliding grooves 124 in a sliding mode, so that after the fixed height of the bottom plate steel bars is adjusted, the bottom plate steel bars are placed in the fixing frame 117, at the moment, the bottom plate steel bars downwards press the control sliding columns 122 to enable the control sliding columns 122 to slide in the fixing frame 117 and extrude the reset springs 120, the connecting swinging rods 121 are driven to rotate along with the sliding of the control sliding columns 122, the auxiliary rotating shafts 123 are driven to slide in the guide sliding grooves 124 through the rotation of the connecting swinging rods 121, the clamping frames 125 simultaneously inwards slide to limit and fix the bottom plate steel bars, the operation is simple and convenient, the use is more convenient, the dual controller and the bottom plate steel bars do not need to be fixed through binding wires, and the labor intensity of workers is reduced.

Specific use and action of the embodiment:

in the use process of the utility model, the auxiliary plate 105 is rotated to drive the control screw 104 to rotate, the upper layer gasket 103 is driven to move up and down by the rotation of the control screw 104, the sliding column 102 is driven to slide in the supporting column 101 to provide guidance for the upper layer gasket 103 in the process of moving up and down the upper layer gasket 103, meanwhile, the auxiliary plate 105 can prevent the upper layer gasket 103 from separating from the control screw 104, the upper layer gasket 103 is moved up and down to facilitate the staff to adjust the distance between the lower layer gasket 1 and the upper layer gasket 103 according to the use requirement in the construction site by the upper layer gasket 103, the staff is convenient to control the thickness of the reinforcement protection layer and the plate thickness of the floor slab, the universality of the dual controller is improved, the locking block 109 is driven to slide in the sliding groove 106 by rotating the locking screw 108, when the locking block 109 slides outwards in the sliding groove 106, the staff can push the reinforcing rods 110 to enable the two mounting frames 107 to slide along the sliding columns 102, the fixing height of the bottom plate reinforcing steel bars can be conveniently adjusted by the staff, after the positions of the mounting frames 107 are adjusted, the locking screw 108 is reversely rotated to enable the locking blocks 109 to be in contact with the inner walls of the sliding grooves 106, friction force between the mounting frames 107 and the sliding columns 102 is increased through the locking blocks 109, the positions of the mounting frames 107 are further fixed, when the bottom plate reinforcing steel bars are fixed, the fixing frames 117 can be rotated along the connecting rotating shafts 111 through the arrangement of the rotating frames 116, the fixing frames 117 can be conveniently attached to the bottom plate reinforcing steel bars with different shapes, the practicability of the dual controller is improved, the connecting rotating shafts 111 are limited and fixed through the limiting inserted rods 113, the positions of the connecting rotating shafts 111 are prevented from being rotated in the using process, the positions of the fixing frames 117 are prevented from being deviated, and when the positions of the fixing frames 117 are required to be rotated, the limiting inserting rod 113 is pulled to enable the limiting inserting rod 113 to slide in the connecting rotating shaft 111 and stretch the supporting spring 115, when the limiting inserting rod 113 is completely separated from the connecting rotating shaft 111, a worker can rotate the fixing frame 117 to adjust the position of the fixing frame 117, after adjustment, the limiting inserting rod 113 is loosened to enable the limiting inserting rod 113 to reset along with resilience of the supporting spring 115 and to be inserted into the connecting rotating shaft 111 again to fix the position of the fixing frame 117, after the fixed height of the bottom plate reinforcing steel bar is adjusted, the bottom plate reinforcing steel bar is placed into the fixing frame 117, at the moment, the bottom plate reinforcing steel bar can downwards press the control sliding column 122 to enable the control sliding column 122 to slide in the fixing frame 117 and press the reset spring 120, the connecting swinging rod 121 can be driven to rotate along with the sliding of the control sliding column 122, the auxiliary rotating shaft 123 is driven to slide in the guide sliding groove 124 through the rotation of the connecting swinging rod 121, the clamping frame 125 can simultaneously inwards slide to limit and fix the bottom plate reinforcing steel bar, the operation is simple and convenient, the use is more convenient, the dual controller and the bottom plate reinforcing steel bar binding wire is not required to fix the bottom plate reinforcing steel bar, labor intensity of the worker is reduced, the construction quality can be controlled when the thickness of a concrete floor slab can be poured, and the construction quality of a floor slab can be well controlled, and the construction quality of a protection layer can be well controlled when the slab is well controlled.

Claims (6)

1. A floor reinforcing bar protective layer thickness and thick dual controller, characterized by, include: a lower layer gasket (1); two support columns (101) are symmetrically and fixedly connected to the top end surface of the lower-layer gasket (1); the two support columns (101) are of round columnar structures; a sliding column (102) is centrally and slidingly connected in the top end surfaces of the two supporting columns (101); the top end surfaces of the two sliding columns (102) are fixedly connected with an upper-layer gasket (103); the upper layer gasket (103) and the lower layer gasket (1) are both circular columnar structures made of concrete; the outer walls of the two sliding columns (102) are both connected with a mounting frame (107) in a sliding manner; the rear parts of the two mounting frames (107) are fixedly connected with a reinforcing rod (110); the left end faces of the two support columns (101) and the right end faces of the two support columns (101) are respectively provided with a sliding groove (106).

2. A floor slab reinforcing bar protection layer thickness and plate thickness dual controller as set forth in claim 1, wherein: a control screw rod (104) is rotatably connected with the top end surface of the lower-layer gasket (1) in the middle; the upper part of the control screw rod (104) is in threaded connection with the upper gasket (103); an auxiliary plate (105) is fixedly connected with the top end surface of the control screw (104).

3. A floor slab reinforcing bar protection layer thickness and plate thickness dual controller as set forth in claim 1, wherein: the front parts of the left end faces of the two mounting frames (107) and the front parts of the right end faces of the two mounting frames (107) are respectively and rotatably connected with a locking screw rod (108); the tail ends of the two locking screws (108) are fixedly connected with a locking block (109); the two blocks are respectively and movably connected in the two sliding grooves (106).

4. A floor slab reinforcing bar protection layer thickness and plate thickness dual controller as set forth in claim 1, wherein: the left end face of the reinforcing rod (110) and the right end face of the reinforcing rod (110) are both rotatably connected with a rotating frame (116) through a connecting rotating shaft (111); the top end surfaces of the two rotating frames (116) are fixedly connected with a fixing frame (117).

5. A floor slab reinforcing bar protection layer thickness and plate thickness dual controller as set forth in claim 4, wherein: a limiting inserted rod (113) is inserted into each of the two connecting rotating shafts (111); two mounting plates (112) are symmetrically and fixedly connected to the rear part of the outer wall of the reinforcing rod (110); the two limit inserted rods (113) are respectively and slidably connected in the two mounting plates (112); the rear parts of the outer walls of the two limiting inserted bars (113) are fixedly connected with a connecting plate (114); the front end surfaces of the two connecting plates (114) are respectively provided with a group of supporting springs (115); the tail ends of the two groups of supporting springs (115) are respectively and fixedly connected to the rear end surfaces of the two mounting plates (112).

6. A floor slab reinforcing bar protection layer thickness and plate thickness dual controller as set forth in claim 4, wherein: a mounting groove (118) is formed in each of the two fixing frames (117); the bottom end surfaces of the two mounting grooves (118) are provided with a telescopic chute (119) in the middle; the top end surfaces of the two telescopic sliding grooves (119) are fixedly connected with a return spring (120); the top end surfaces of the two return springs (120) are fixedly connected with a control sliding column (122); the two control slide posts (122) are respectively and slidably connected in the two fixing frames (117); a group of connecting swing rods (121) are symmetrically and rotationally connected in the two mounting grooves (118); the tail ends of the two groups of connecting swing rods (121) are respectively and rotatably connected to the lower parts of the outer walls of the two control slide columns (122); the head ends of the two groups of connecting swing rods (121) are respectively connected with a clamping frame (125) through an auxiliary rotating shaft (123) in a rotating way; a group of guide sliding grooves (124) are symmetrically formed at the upper parts of the two mounting grooves (118); the two groups of auxiliary rotating shafts (123) are respectively and slidably connected in the two groups of guide sliding grooves (124).

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