CN209340789U

CN209340789U - A kind of economic concertina type display bracket of clip

Info

Publication number: CN209340789U
Application number: CN201822164526.XU
Authority: CN
Inventors: 唐吉积
Original assignee: NINGBO YAJI ELECTROMECHANICAL TECHNOLOGY Co Ltd
Current assignee: NINGBO YAJI ELECTROMECHANICAL TECHNOLOGY Co Ltd
Priority date: 2018-12-21
Filing date: 2018-12-21
Publication date: 2019-09-03
Anticipated expiration: 2028-12-21

Abstract

The utility model relates to display bracket fields, in particular to a kind of economic concertina type of clip shows bracket, including clip pedestal, telescopic arm, constant force gas spring and support panel, the top of clip pedestal is equipped with first axle and connects column, telescopic arm includes the principal arm and regulating arm of hollow structure, one end of principal arm connects column with first axle and connect, one end of regulating arm can be movably set in the principal arm other end, the inside of principal arm is equipped with the regulating part being sequentially connected with regulating arm, regulating arm is equipped with fixed column far from principal arm one end, fixed column upper end is equipped with the second axis and connects column, one end of constant force gas spring and the second axis connect column articulated cooperation, and its other end is hinged with elevation angle block, support panel is connect with elevation angle block, principal arm and regulating arm are that SPCC cold-reduced sheet material is made, first axle connects column, second axis connects column, fixed column and elevation angle block are sheet metal component, this It is practical to reduce manufacturing cost and then the appearance for casting out bracket, so that its price, more for advantage, is there is preferable prospect for sales compared to similar product.

Description

A kind of economic concertina type display bracket of clip

Technical field

The utility model relates to display bracket field, in particular to a kind of economic concertina type of clip shows bracket.

Background technique

Existing computer display stand is fixedly connected using with display housing mostly, is enhanced to the steady of display Fixed support also develops many display brackets with other function, such as with the increase of the use demand of people in succession Storage object, rotation with function for changing display direction etc., so the controllability of display bracket be it is popular, But for some consumers, what is nowadays more focused on is the commercial value of display bracket, thus a plurality of close or In contrast, which kind of more meets economical is only display bracket Developing mainstream to the bracket of same function.

Utility model content

The purpose of this utility model is that in view of the deficiencies of the prior art, providing a kind of economic concertina type display branch of clip Frame.

To solve the above problems, the utility model the following technical schemes are provided:

A kind of economic concertina type display bracket of clip, including clip pedestal, telescopic arm, constant force gas spring and supporting surface The first axle that is equipped with of plate, the top side detachable of clip pedestal connects column, and telescopic arm includes the principal arm and regulating arm of hollow structure, main One end of arm and first axle, which connect column and be integrally formed, to be arranged, and one end of regulating arm movable can be set in the other end of principal arm, main The inside of arm is equipped with the regulating part that telescopic movable occurs for manually driving regulating arm, outside principal arm, regulating arm It is in vertical fixed column that one end far from principal arm, which is integrally formed and is equipped with, and the upper end of fixed column is removably equipped with the second axis and connects Column, one end of constant force gas spring and the second axis connect column articulated cooperation, and the other end of constant force gas spring is hinged with elevation angle block, supporting surface Plate is detachably connected by Fast detachable unit and elevation angle block, and the principal arm and regulating arm are that SPCC cold-reduced sheet material is made, and described One axis connects column, the second axis connects column, fixed column and elevation angle block are sheet metal component.

Further, regulating part is symmetrically set in inside principal arm including adjusting screw rod and two bearing blocks, two bearing blocks, and The two close to one end of principal arm, adjusts screw axis and connects between two bearing blocks respectively, and being arranged on adjusting screw rod can be therewith It is driven the nut block of cooperation, the two sides of the nut block are respectively equipped with a linkage board towards regulating arm internal stretch, Mei Gelian The front end of movable plate is in regulating arm always, the front end of two linkage boards and the side being located remotely from each other be respectively equipped with one it is convex Block, each linkage board passes through respective convex block, is fixedly connected respectively with an inner sidewall of regulating arm, after each linkage board End inside cooperates with the medial surface activity of principal arm, adjusts screw rod far from one end of regulating arm and is arranged with umbrella tooth one, the umbrella tooth one Side be equipped with the umbrella tooth two that can be meshed therewith, the outside of principal arm is provided with the extension being fixedly and coaxially connected with umbrella tooth two The outer end of bar, extension rod is equipped with bolt bar.

Further, adjusting screw rod is trapezoidal screw.

Further, the upper and lower surfaces of principal arm offer one respectively and can match with the medial surface activity of regulating arm The guide groove of conjunction.

Further, it is hollow structure that first axle, which connects column, and the top of clip pedestal is equipped with the limit buckle of zigzag configuration, is limited For position button in being vertically arranged, the lower end that first axle connects column can be tightly attached to the top of clip pedestal by the first tight fixed bolt, and The upper end can be tightly attached to the top lower surface of limit buckle by the second tight fixed bolt, the top of clip pedestal offer with for The threaded hole of first tight fixed bolt installation, the top of limit buckle is offered with the limit hole installed for the second tight fixed bolt.

Further, the second axis connects column and fixed column is hollow structure, and the bottom end that the second axis connects column passes through third tightening The top of fixed column can be arranged in bolt with vertical posture, and it is through fixed column that third tight fixed bolt, which is under installation condition, Setting.

Further, the outside of constant force gas spring is set there are two clamping plate, and two clamping plates are symmetrical arranged in upper and lower, and will be permanent In strength spring is sufficiently wrapped in, the both ends of two clamping plates connect column with the second axis respectively and elevation angle block axis connects cooperation, two clamping plates It is that SPCC cold-reduced sheet material is made.

Further, Fast detachable unit includes bearing block, is connect at the front end of bearing block and the center back of support panel, load-bearing The rear end of block offers Quick Release hole, and the outer end of elevation angle block, which is offered, is installed to the rear end with bearing block by the 4th tight fixed bolt Connecting hole, bearing block is sheet metal component.

Further, the material for supporting panel is SPCC cold-reduced sheet.

Further, in two clamping plates, the bottom of the clamping plate bottom and regulating arm that are below is respectively equipped with one It is a to cross cableties.

The utility model has the advantages that a kind of economic concertina type of clip of the utility model shows bracket, it manually can be by using certain Strength, turn bolt bar promote extension rod to be rotated with umbrella tooth two, and in rotation, umbrella tooth two engages umbrella tooth one, and then promotees Make to adjust screw rod and carry out rotation, in rotation, nut block occurs along the axial-movement for adjusting screw rod, and then passes through linkage board and convex Block drives regulating arm that stretching motion occurs against principal arm, changes the length between regulating arm and principal arm with this, stretches to realize The adjusting for the aspect that contracts, and flexible maximum length is the section 25-27cm, and first axle is then connect column and is placed on threaded hole and limit Between the hole of position, and his angle is adjusted, that is, principal arm and regulating arm are specifically towards which direction；After adjusting, it can lead to Crossing the first tight fixed bolt and the second tight fixed bolt, that first axle connect column is fixed；Second axis connects after column is placed in fixed column, can It is transferred, that is, second rotates horizontally adjusting, which direction is purpose improve constant force gas spring specifically towards, then will Third tight fixed bolt is screwed in the second axis the inside for connecing column by the bottom end of fixed column, and the second axis is connect column with this and fixed column is implemented Connection.Elevation angle block is cooperation constant force gas spring and two clamping plates, promotes elevation angle block to be able to carry out and faces upward or the adjusting of dipping type, The dispensing angle up and down of purpose improvement later period display screen；Supporting panel is to install display, after the installation is completed, supporting surface Plate can be realized by the 4th tight fixed bolt by bearing block and elevation angle block and be connected, and before connection, bearing block can be carried out specifically Rotation, realizes third Level tune with this, and then promotes to support panel that can be detached from constant force gas bullet with display screen Independent rotation occurs for spring, further strengthens the adjusting of the level angle of the dispensing of display；Support panel, principal arm, regulating arm It is that after SPCC cold-reduced sheet material makes this bracket integrally be guaranteed in terms of intensity, further reduced life with two clamping plates The cost of production, while first axle connects column, the second axis connects column, fixed column, elevation angle block and bearing block are sheet metal component instead of tradition Die casting, according to market survey, the production cost of sheet metal component is less than die casting, and range is percent 30 or so, in this way So that this display bracket, in the later period sells, price can be lower than similar product, has economic and practical, met low side consumer The demand of group；And this display bracket is suitable for some middle-size and small-size displays；Originally practical to be subtracted and then the appearance for casting out bracket Few manufacturing cost, makes later period price that can have preferable prospect for sales more for advantage compared to similar product.

Detailed description of the invention

Fig. 1 is the schematic perspective view of the utility model；

Fig. 2 is the floor map one of the utility model；

Fig. 3 is the decomposition texture schematic diagram one of the utility model；

Fig. 4 is the decomposition texture schematic diagram two of the utility model；

Fig. 5 is the floor map two of the utility model；

Description of symbols: clip pedestal 1,

Principal arm 2, regulating arm 2a, first axle meet column 2b, bearing block 2c, adjust screw rod 2d, nut block 2e, linkage board 2f, convex Block 2g, one 2t of umbrella tooth, umbrella tooth two 2r, bolt bar 2m, guide groove 2k.

Constant force gas spring 3, clamping plate 3a cross cableties 3b.

Limit buckle 4, the first tight fixed bolt 4a, the second tight fixed bolt 4b.

Fixed column 5, the second axis meet column 5a, elevation angle block 5b, third tight fixed bolt 5c,

Support panel 6, bearing block 6a.

Specific embodiment

With reference to the accompanying drawings of the specification and embodiment, specific embodiment of the utility model is described in further detail:

Referring to figs. 1 to a kind of economic concertina type display bracket of clip shown in fig. 5, including clip pedestal 1, telescopic arm, perseverance Strength spring 3 and support panel 6, the first axle that is equipped with of the top side detachable of clip pedestal 1 meet column 2b, during telescopic arm includes The principal arm 2 and regulating arm 2a of hollow structure, one end of principal arm 2 and first axle, which meet column 2b and be integrally formed, to be arranged, one end of regulating arm 2a Movable can be set in the other end of principal arm 2, the inside of principal arm 2 be equipped with for manually driving regulating arm 2a, in master The regulating part of telescopic movable occurs outside arm 2, it is in vertical fixation that regulating arm 2a, which is integrally formed far from one end of principal arm 2 and is equipped with, Column 5, the upper end of fixed column 5 are removably equipped with the second axis and meet column 5a, and one end of constant force gas spring 3 and the second axis connect column 5a hinge Cooperation is connect, the other end of constant force gas spring 3 is hinged with elevation angle block 5b, and support panel 6 is detachable by Fast detachable unit and elevation angle block 5b Connection, the principal arm 2 and regulating arm 2a are that SPCC cold-reduced sheet material is made, the first axle meets column 2b, the second axis meets column 5a, Fixed column 5 and elevation angle block 5b are sheet metal component.

Regulating part includes adjusting screw rod 2d and two bearing block 2c, and two bearing block 2c are symmetrically set in inside principal arm 2, and two Person close to one end of principal arm 2, adjusts screw rod 2d axis and connects between two bearing block 2c respectively, and being arranged on adjusting screw rod 2d can It is driven the nut block 2e of cooperation therewith, the two sides of nut block 2e are respectively equipped with a linkage towards regulating arm 2a internal stretch Plate 2f, the front end of each linkage board 2f are in always in regulating arm 2a, the front end of two linkage board 2f and be located remotely from each other one Side is respectively equipped with a convex block 2g, each linkage board 2f pass through respective convex block 2g, respectively with an inside of regulating arm 2a Wall is fixedly connected, and the rear inside of each linkage board 2f cooperates with the medial surface activity of principal arm 2, adjusts screw rod 2d far from adjusting One end of arm 2a is arranged with one 2t of umbrella tooth, and the side of one 2t of the umbrella tooth is equipped with two 2r of umbrella tooth that can be meshed therewith, principal arm 2 Outside is provided with the extension rod being fixedly and coaxially connected with two 2r of umbrella tooth, and the outer end of extension rod is equipped with bolt bar 2m；Manually may be used By using certain strength, turn bolt bar 2m promotes extension rod to be rotated with two 2r of umbrella tooth, in rotation, umbrella tooth Two 2r engage one 2t of umbrella tooth, and then promote adjusting screw rod 2d progress rotation, and in rotation, nut block 2e occurs edge and adjusts screw rod 2d's Axial-movement, and then stretching motion is occurred against principal arm 2 by linkage board 2f and convex block 2g, drive regulating arm 2a, changed with this The length to modify tone between joint arm 2a and principal arm 2, to realize the adjusting of flexible aspect, and flexible maximum length is 25- The section 27cm.

Adjusting screw rod 2d is trapezoidal screw；The self-locking performance of trapezoidal screw is stronger than screw rods such as ball screws, and then ensures to adjust Arm 2a and principal arm 2 are flexible change after stability.

The upper and lower surfaces of principal arm 2 offer one respectively and can lead with what the medial surface activity of regulating arm 2a cooperated To slot 2k；During nut block 2e is moved, regulating arm 2a can be moved synchronously with nut block 2e, and then adjust regulating arm 2a and principal arm Length between 2, and the cooperation of the inside of regulating arm 2a and guide groove 2k so that the active strokes of regulating arm 2a obtain specification and It limits.

It is hollow structure that first axle, which meets column 2b, and the top of clip pedestal 1 is equipped with the limit buckle 4 of zigzag configuration, limit buckle 4 In being vertically arranged, the lower end that first axle meets column 2b can be tightly attached to the top of clip pedestal 1 by the first tight fixed bolt 4a, and The upper end can be tightly attached to the top lower surface of limit buckle 4 by the second tight fixed bolt 4b, and the top of clip pedestal 1 opens up useful For the threaded hole of the first tight fixed bolt 4a installation, the top of limit buckle 4 is offered with installing for the second tight fixed bolt 4b Limit hole；First axle connects the detachability of column 2b, so that this bracket, which has, can be convenient for logistics transportation and horizontal rotation modulability, Specifically, first axle meets column 2b and is placed between threaded hole and limit hole, and adjusts his angle, that is, principal arm 2 and tune Joint arm 2a is specifically towards which direction；This is adjusted for the first rotation, after adjusting, can pass through the first tight fixed bolt 4a and the It is fixed that first axle is met column 2b by two tight fixed bolt 4b.

Second axis meets column 5a and fixed column 5 is hollow structure, and the bottom end that the second axis meets column 5a passes through third tight fixed bolt The top of fixed column 5 can be arranged in 5c with vertical posture, and it is through fixation that third tight fixed bolt 5c, which is under installation condition, Column 5 is arranged；Second axis connects the detachability of column 5a, so that this bracket, which has, to be adjusted convenient for logistics transportation and horizontal rotation Property, specifically, the second axis connects after column 5a is placed in fixed column 5, can be transferred, that is, second rotates horizontally and adjust Section, purpose improve constant force gas spring 3 specifically towards which direction, then revolve third tight fixed bolt 5c by the bottom end of fixed column 5 Enter to the second axis to connect the inside of column 5a, the second axis is connect by column 5a with this and fixed column 5 is implemented to connect.

The outside of constant force gas spring 3 is set there are two clamping plate 3a, and two clamping plate 3a in being symmetrical arranged up and down, and by constant force gas In spring 3 is sufficiently wrapped in, the both ends of two clamping plate 3a meet column 5a with the second axis respectively and elevation angle block 5b axis connects cooperation, two folders Plate 3a is that SPCC cold-reduced sheet material is made；Elevation angle block 5b is cooperation constant force gas spring 3 and two clamping plate 3a, promotes elevation angle block 5b, which is able to carry out, to face upward or the adjusting of dipping type, and purpose improves the dispensing angle up and down of later period display screen.

Fast detachable unit includes bearing block 6a, is connect at the front end of bearing block 6a and the center back of support panel 6, bearing block 6a Rear end offer Quick Release hole, the outer end of elevation angle block 5b, which is offered, to be passed through the 4th tight fixed bolt to the rear end with bearing block 6a and pacifies The connecting hole of dress, bearing block 6a are sheet metal component；Support panel 6 is after the installation is completed, supporting panel 6 to install display It can be realized and be connected by the 4th tight fixed bolt by bearing block 6a and elevation angle block 5b, and before connection, bearing block 6a can be specific It is rotated, third Level tune is realized with this, and then promote to support panel 6 that can be detached from permanent with display screen Independent rotation occurs for strength spring 3, further strengthens the adjusting of the level angle of the dispensing of display.

The material for supporting panel 6 is SPCC cold-reduced sheet；Under the material ensures intensity, manufacturing cost is reduced.

In two clamping plate 3a, the bottom of a bottom clamping plate 3a and regulating arm 2a that is below be respectively equipped with a mistake Cableties 3b；It crosses cableties 3b to pass through to the electric wire for computer, and regular electric wire, so that electric wire will not put entanglement.

Working principle: manually extension rod can be promoted with umbrella tooth two by using certain strength, turn bolt bar 2m 2r is rotated, and in rotation, two 2r of umbrella tooth engages one 2t of umbrella tooth, and then promotes adjusting screw rod 2d progress rotation, in rotation, nut Block 2e occurs along the axial-movement for adjusting screw rod 2d, and then by linkage board 2f and convex block 2g, drive regulating arm 2a against master Stretching motion occurs for arm 2, changes the length between regulating arm 2a and principal arm 2 with this, thus realize the adjusting of flexible aspect, and Flexible maximum length is the section 25-27cm, and first axle is then met column 2b and is placed between threaded hole and limit hole, and is adjusted His angle, that is, principal arm 2 and regulating arm 2a are saved specifically towards which direction；After adjusting, the first clamp screw can be passed through It is fixed that first axle is met column 2b by bolt 4a and the second tight fixed bolt 4b；Second axis connects after column 5a is placed in fixed column 5, can be by it It is transferred, that is, second rotates horizontally and adjust, purpose improves constant force gas spring 3 specifically towards which direction, then by the Three tight fixed bolt 5c are screwed in the second axis the inside for meeting column 5a by the bottom end of fixed column 5, and the second axis is met column 5a and fixation with this Column 5 implements connection.Elevation angle block 5b is cooperation constant force gas spring 3 and two clamping plate 3a, promotes elevation angle block 5b to be able to carry out and faces upward Or the adjusting of dipping type, purpose improve the dispensing angle up and down of later period display screen；Support panel 6 be to install display, After the installation is completed, support panel 6 can be realized by the 4th tight fixed bolt by bearing block 6a and elevation angle block 5b and be connected, and be connected Before, bearing block 6a can be rotated specifically, realize third Level tune with this, and then promote to support panel 6 can be with aobvious In the case where display screen, it is detached from constant force gas spring 3, independent rotation occurs, further strengthens the level angle of the dispensing of display Adjusting；Support panel 6, principal arm 2, regulating arm 2a and two clamping plate 3a are that SPCC cold-reduced sheet material makes this bracket entirety exist After being guaranteed in terms of intensity, the cost of production further reduced, while first axle meets column 2b, the second axis meets column 5a, fixation Column 5, the elevation angle block 5b and bearing block 6a are sheet metal component instead of traditional die casting, according to market survey, the production of sheet metal component Cost is less than die casting, and range is percent 30 or so, so that for this display bracket in later period sale, price can be low In similar product, have economic and practical, has met the demand of low side consumer groups；And this display bracket is suitable for some medium and small The display of type.

The above descriptions are merely preferred embodiments of the present invention, not makees to the technical scope of the utility model Any restrictions out, thus it is any trickle amendment made by the above technical examples according to the technical essence of the present invention, equivalent Variation and modification, in the range of still falling within the technical solution of the utility model.

Claims

1. a kind of economic concertina type of clip shows bracket, it is characterised in that: including clip pedestal (1), telescopic arm, constant force gas spring (3) and support panel (6), the first axle that is equipped with of the top side detachable of clip pedestal (1) connects column (2b), during telescopic arm includes The principal arm (2) and regulating arm (2a) of hollow structure, one end of principal arm (2) and first axle, which meet column (2b) and be integrally formed, to be arranged, regulating arm The one end of (2a) movable can be set in the other end of principal arm (2), and the inside of principal arm (2) is equipped with for manually driving Regulating arm (2a), the regulating part that telescopic movable occurs outside principal arm (2), the one end one of regulating arm (2a) far from principal arm (2) Body formed be equipped with is in vertical fixed column (5), and the upper end of fixed column (5) is removably equipped with the second axis and connects column (5a), constant force One end of gas spring (3) and the second axis connect column (5a) and hingedly cooperate, and the other end of constant force gas spring (3) is hinged with elevation angle block (5b), support panel (6) are detachably connected by Fast detachable unit with elevation angle block (5b), and the principal arm (2) and regulating arm (2a) are SPCC cold-reduced sheet material is made, and the first axle connects column (2b), the second axis connects column (5a), fixed column (5) and elevation angle block (5b) are equal For sheet metal component.

2. the economic concertina type of a kind of clip according to claim 1 shows bracket, it is characterised in that: regulating part includes adjusting Screw rod (2d) and two bearing blocks (2c), it is internal that two bearing blocks (2c) are symmetrically set in principal arm (2), and the two is respectively close to principal arm (2) one end adjusts screw rod (2d) axis and connects between two bearing blocks (2c), adjusts and be arranged with and can pass therewith on screw rod (2d) The nut block (2e) of dynamic cooperation, the two sides of the nut block (2e) are respectively equipped with a linkage towards regulating arm (2a) internal stretch Plate (2f), the front end of each linkage board (2f) are in always in regulating arm (2a), the front end of two linkage boards (2f) and mutually Separate side is respectively equipped with a convex block (2g), each linkage board (2f) by respective convex block (2g), respectively with adjusting One inner sidewall of arm (2a) is fixedly connected, and medial surface activity of the rear inside of each linkage board (2f) with principal arm (2) is matched It closes, adjusts screw rod (2d) far from the one end of regulating arm (2a) and be arranged with umbrella tooth one (2t), the side of the umbrella tooth one (2t) is equipped with energy Enough umbrella tooths two (2r) being meshed therewith, the outside of principal arm (2) are provided with the extension rod being fixedly and coaxially connected with umbrella tooth two (2r), The outer end of extension rod is equipped with bolt bar (2m).

3. the economic concertina type of a kind of clip according to claim 2 shows bracket, it is characterised in that: adjusting screw rod (2d) is Trapezoidal screw.

4. the economic concertina type of a kind of clip according to claim 2 shows bracket, it is characterised in that: the upper table of principal arm (2) Face and lower surface offer the guide groove (2k) that can cooperate with the medial surface activity of regulating arm (2a) respectively.

5. the economic concertina type of a kind of clip according to claim 1 shows bracket, it is characterised in that: first axle meets column (2b) For hollow structure, the top of clip pedestal (1) is equipped with the limit buckle (4) of zigzag configuration, and limit buckle (4) is in be vertically arranged, and first The lower end that axis connects column (2b) can be tightly attached to the top of clip pedestal (1) by the first tight fixed bolt (4a), and the upper end is logical Cross the top lower surface that the second tight fixed bolt (4b) can be tightly attached to limit buckle (4), the top of clip pedestal (1) offer to For the threaded hole of the first tight fixed bolt (4a) installation, the top of limit buckle (4) is offered with for the second tight fixed bolt (4b) peace The limit hole of dress.

6. the economic concertina type of a kind of clip according to claim 1 shows bracket, it is characterised in that: the second axis meets column (5a) It is hollow structure with fixed column (5), the bottom end that the second axis connects column (5a) can be with vertical appearance by third tight fixed bolt (5c) State is arranged on the top of fixed column (5), and it is being arranged through fixed column (5) that third tight fixed bolt (5c), which is under installation condition,.

7. the economic concertina type of a kind of clip according to claim 6 shows bracket, it is characterised in that: constant force gas spring (3) Outside set there are two clamping plate (3a), two clamping plates (3a) sufficiently wrap up constant force gas spring (3) in being symmetrical arranged up and down Inside, the both ends of two clamping plates (3a) connect column (5a) with the second axis respectively and elevation angle block (5b) axis connects cooperation, two clamping plates (3a) It is that SPCC cold-reduced sheet material is made.

8. the economic concertina type of a kind of clip according to claim 1 shows bracket, it is characterised in that: Fast detachable unit includes load-bearing Block (6a), the front end of bearing block (6a) and supporting are connect at the center back of panel (6), and the rear end of bearing block (6a) offers fastly Tear hole open, the outer end of elevation angle block (5b), which is offered, passes through the connection that the 4th tight fixed bolt is installed to the rear end with bearing block (6a) Hole, bearing block (6a) are sheet metal component.

9. the economic concertina type of a kind of clip according to claim 1 shows bracket, it is characterised in that: support panel (6) Material is SPCC cold-reduced sheet.

10. the economic concertina type of a kind of clip according to claim 6 shows bracket, it is characterised in that: two clamping plates (3a) In, the bottom of a clamping plate bottom (3a) and regulating arm (2a) that is below is respectively equipped with one and crosses cableties (3b).