CN208685598U - A kind of clamping tool - Google Patents

Abstract

The utility model relates to a kind of clamping tools, including base plate, slide bar, upper clamp plate and middle clamp plate；The slide bar is vertically fixed on base plate；Upper clamp plate is fixedly connected on top end of sliding rod；Middle clamp plate is socketed on slide bar and can move between upper clamp plate and base plate along slide bar.The clamping tool of the utility model, matches with locking device, is that locking device can be realized and lock in the case where there is pressure condition, ensure that the safety of construction.

Description

A kind of clamping tool

Technical field

The utility model belongs to Construction of Civil Engineering field, for clamping and fixing locking device, is especially used for waters The clamping tool of locking device when the installation of the split blade type casing of middle Concrete Grouting Pale.

Background technique

In bored pile construction, casing is essential.Casing need to be buried to maintain the steady of the stake holes aperture soil body Calmly, in addition to this, the effects of being higher than water level outside hole there are also mud face in positioning, retaining hole.Casing makes frequently with steel.Casing is fixed When position, first using stake position center as the center of circle, casing position is made on soil according to casing radius, after casing is in place, applying pressure will Casing is embedded to depth certain in the soil body.Check whether casing is vertical during embedment, if discovery deflection, timely correction.Shield Effect of the cylinder in filling pile construction mainly has: 1, positioning；2, the stabilization of the aperture soil body is protected；3, mud face is higher than in retaining hole Water level outside hole generates lateral pressure, prevents the hole that collapses；4, it can be used as one of pile head elevation control foundation.

Requirement to casing is that have certain intensity, rigidity and leakproofness, the former prevents from being unlikely to deform in use, The latter can play a part of to maintain liquid level in cylinder to be higher than the outer water surface of cylinder.

After land casing is buried in place, it will be compacted on the outside of casing with clay backfilling, it is existing to prevent casing surrounding from leak occur As.After the completion of filling pile construction, takes out casing and be used in turn.

And in waters when Concrete Grouting Pale, have to the traditional method of casing: 1, filling pile construction after the completion of, shield Cylinder, which is kept, no longer to be removed, and which increase construction costs；2, it is the casing that casing is designed to two Integral types, is connected with high-strength bolt It connects, underwater operation is carried out to remove by diver when filling pile construction is completed to remove.Such two Integral types design, casing Being generated biggish frictional force by concrete lateral pressure in using makes dismounting work hard, while diver tears open under water Except first safety is relatively low for operation, second expense is also high.

Therefore consider to assemble the casing to be formed in waters in Concrete Grouting Pale using dismountable casing.It can Remove casing by stack shell combining by multiple pieces decoupling, split position and no longer bolt used to assemble, and waterborne can grasp It splits, it is safe and efficient.Using the locking device that can be opened and lock being divided into come more multiple pieces assembling and multiple stack shells Assembling.

Utility model content

The utility model provides a kind of clamping tool, and the casing for fragment is difficult using locking tool locking process In reinforcing locking, solve because in waters with pressure due to lead to asking for the casing that fragment can not be locked against locking device Topic.

Specifically, a kind of clamping tool provided by the utility model, wherein clamping tool includes base plate, slide bar, upper folder Plate and middle clamp plate；The slide bar is vertically fixed on base plate；Upper clamp plate is fixedly connected on top end of sliding rod；Middle clamp plate is socketed in cunning It can be moved on bar and between upper clamp plate and base plate along slide bar.

In some preferred embodiments, clamping tool further includes the jack between middle clamp plate and base plate.Thousand The very useful movement in control middle clamp plate on slide bar of jin.

In some preferred embodiments, upper clamp plate is connected to top end of sliding rod perpendicular to slide bar, upper clamp plate end.

In some preferred embodiments, middle clamp plate is socketed on slide bar perpendicular to slide bar in the middle part of middle clamp plate.

In some preferred embodiments, one end that middle clamp plate is located at upper clamp plate lower part has hole.

In some preferred embodiments, jack is located at middle clamp plate without between the other end and base plate in hole.

Beneficial effect

The clamping tool of the utility model, matches with locking device, is that locking device can be realized and have pressure feelings It is locked under condition, ensure that the safety of construction.

Detailed description of the invention

Fig. 1 is the structural facades schematic diagram of the utility model casing；

Fig. 2 is another structural schematic diagram of the utility model casing；

Fig. 3 is the locking device arrangement schematic diagram of the coxopodite casing lower flange piece of the utility model casing；

Fig. 4 is the structural schematic diagram of common casing and coxopodite casing

Fig. 5 is the B-B sectional view of Fig. 4；

Fig. 6 is the schematic diagram of P connector annular sealing gaskets；

Fig. 7 is the G-G diagrammatic cross-section of Fig. 6；

Fig. 8 is the schematic diagram of I shape gasket seal；

Fig. 9 is flange locking device locking state schematic diagram；

Figure 10 is flange locking device open state schematic diagram；

Figure 11 is another locking state schematic diagram of flange locking device；

Figure 12 is another open state schematic diagram of flange locking device；

Figure 13 is cylinder piece locking device locking state schematic diagram；

Figure 14 is cylinder piece locking device open state schematic diagram；

Figure 15 is bull stick attachment structure schematic diagram；

Figure 16 is bar jointing structure schematic diagram；

Figure 17 is T shape lock shaft structural schematic diagram；

The location diagram of T forming head and slot when Figure 18 is cylinder piece locking device locking state；

The location diagram of T forming head and slot when Figure 19 is cylinder piece locking device open state；

Figure 20 is the axis side schematic diagram of compaction tool；

Figure 21 is the operation schematic diagram of compaction tool.

Appended drawing reference

Dismountable casing 100 does not remove casing 200, coxopodite casing 10, fragment type casing 20, cylinder piece locking device 6, drawing Bar bracket 80, bull stick bracket 50, P connector annular sealing gaskets 1, flange locking device 30, pull rod 70, bull stick 40, pull rod connection Structure 8, sleeve 91, dormant bolt 92, bull stick connection structure 4, recessed plug 41, convex plug 42 do not remove casing top flange plate 2, Bar rotation handle 3, bull stick connection structure 4, pull rod carrying handle 7, traction rope 60, turning handle 33, upper flange piece 21, lower flange piece 22, stack shell 23, arc tube piece 24, cylinder piece connecting plate 25, I shape gasket seal 26, gasket cylindrical body 28, lifting lug 27, slot 29, lock Axis hole 39, T shape lock shaft 32, nut 35, spring 31, protrusion 34, T forming head 36, square section section 37, thread segment 38, bolt 97, limit Pin 62, compaction tool 300, upper clamp plate 301, hole 302, slide bar 305, middle clamp plate 304, base plate 306, jack 307

Specific embodiment

Below to the utility model relates to structure or technical term used in these be described further.Below Detailed description in, the subsidiary reference word of legend is a part here, it may be real to illustrate the utility model The mode of capable specific concrete scheme illustrates.We be not precluded the utility model can also carry out other concrete schemes and Change the structure of the utility model without prejudice to the use scope of the utility model.

As shown in Figure 1-3, the utility model casing includes two large divisions: not removing casing 200 and dismountable casing 100. Wherein, casing 200 is not removed for being embedded to below ground, and dismountable casing 100, which is connected to, not to be removed on casing, and dismountable Casing 100 is located at ground or more.

Dismountable casing 100 is formed by connecting by a section or the common casing 20 of more piece, wherein positioned at a section fragment of bottommost Type casing claims coxopodite casing 10 fragment type.When common casing 20 is more piece, the length of every common casing 20 of section can be identical, can also With not identical.In addition, coxopodite casing 10 and the length of common casing 20 may be the same or different.Preferably, common casing 20 length is not usually identical, the length of the dismountable casing 100 for being combined into needs more convenient in this way, and is used in turn middle convenience Transport, storage.

The diameter of entire casing is identical, facilitates connection and sealing, therefore, dismountable casing 100 with not remove casing 200 straight Diameter is identical, and coxopodite casing 10 is identical as common 20 diameter of casing.

The top flange plate 2 that casing 200 includes stack shell and is connected at the top of stack shell is not removed.Wherein, stack shell is integral type knot Structure.

As shown in Figure 4 and Figure 5, coxopodite casing 10 and common casing 20 are by upper flange piece 21, lower flange piece 22, stack shell 23 It constitutes；Upper flange piece 21 is connected to 23 top of stack shell, and lower flange piece 22 is connected to 23 bottom of stack shell.Wherein, stack shell 23 is by multi-disc Arc tube piece 24 circumferentially encloses.In some specific embodiments, the arc tube piece 24 an of stack shell 23 is enclosed at 3 Or 4.In this way, when will not there was only two because of cylinder piece 24, because concrete to the adsorption capacity of casing and frictional force too greatly caused by tear open Except difficulty, production workload and cost will not be increased because cylinder piece 24 is too many.

In the utility model, entire casing is split as not remove casing 200 and dismountable casing 100, by dismountable shield 100 points of cylinder are a section or the common casing 20 of more piece, wherein the common casing for being located at bottommost claims coxopodite casing 10, and by coxopodite The stack shell 23 of casing and common casing is split as multiple arcs cylinder piece 24, exactly in order to make construction after the completion of, can smoothly remove Casing part more than riverbed bottom, to realize being used in turn for casing, and mesh that is convenient and saving material and cost of constructing 's.

When dismountable casing 100 is not with removing casing 200 and connecting, by top flange plate 2 and the bottom of not removing casing 200 The lower flange piece 22 for saving casing 10 connects.Specifically, in the laxative remedy for the top flange plate 2 and coxopodite casing 10 for not removing casing 200 Blue piece 22 pad is equipped with P connector annular sealing gaskets 1, then, is locked lower flange piece 22 and top method with flange locking device 30 Blue piece 2, makes not remove casing 200 and is fixedly connected with coxopodite casing 20, and that is to say makes not remove casing 200 and dismountable casing 100 are fixedly connected.

As shown in Fig. 1, Fig. 9-Figure 12 and Figure 17, flange locking device 30 include T shape lock shaft 32, spring 31, turning handle 33, Nut 35.32 one end of T shape lock shaft have protrusion 34 T forming head, other end least significant end have thread segment 38, close to thread segment at be Square section section 37.Attaching nut 35 on thread segment 38；Square section section 37 connects turning handle 33；Spring 31 is located at T forming head and turning handle 33 Between.There is turning handle hole, the square section section turning handle 33 for installing lock shaft is connected with traction rope 60, and traction rope 60 is simultaneously on turning handle Be connected on bull stick 40, bull stick 40 rotated by bar rotation handle 3, with the rotation of bull stick 40, drive traction rope 60 and The turning handle 33 being attached thereto rotates, and flange locking device 30 is opened.

Specifically, T shape lock shaft 32 never remove casing 200 push up set on flange plate 2 with the matched slot of T forming head (in figure It is not shown) it penetrates, P connector annular sealing gaskets 1 is then passed through to 20 lower flange piece 22 of coxopodite casing, and is detained with T forming head protrusion 34 Do not remove after casing 200 pushes up flange plate 2 (at this time T forming head and slot length to vertical), cover upper spring 31, then put on and square section The turning handle 33 that face matches screws on nut 35, and constantly precession nut 35 causes spring 31 to be compressed to scheduled amount.The bullet having compressed Spring 31 generate pressure make two flange mortice locks (pressure) tightly, between flange plate be in locking state, coxopodite casing with do not remove casing Locking.Traction rope 60 is connected on turning handle, and 60 other end of traction rope is connected on bull stick 40.It is locked when needing to open flange Device 30 makes coxopodite casing with when not removing casing and separating, and operation bar rotation handle 3 rotates bull stick 40, is passed by traction rope 60 Passing makes 33 Forced rotation of turning handle, it is made to rotate 90 degree, and T shape lock shaft 32 is driven to rotate, and T forming head 36 is gone to and slot length direction one It causes, T forming head 36 is retracted into slot under the action of spring 31, lower flange piece 22 and does not remove casing 200 and pushes up between flange plate 2 No longer lock (pressure) tightly, realizes the remote opening of flange locking device 30.

In addition, coxopodite casing 10, fragment type casing 20 side wall on have bull stick bracket 50, for installing bull stick 40, Bull stick realizes the remote opening operation of locking device 30 using 4 spreading of bull stick connection structure to operable position.In order to prevent Bull stick slides in bull stick bracket, also for limit, is equipped with spacer pin 62 in bull stick and bull stick bracket junction.

The enclosing connection of stack shell 23 is the company by being connected between the cylinder piece connecting plate 25 of every 24 two sides of arc tube piece Realization is fetched, specifically, being folded with I shape gasket seal 26 between two cylinder piece connecting plates 25, then, is connected by cylinder piece Cylinder piece connecting plate 25 is fixedly connected by the column cylinder piece locking device 6 arranged on plate 25.To form cylinder-shaped stack shell 23.It is logical Often, the column cylinder piece locking device 6 on cylinder piece connecting plate 25 has two or more.Specifically, one side connecting plate of cylinder piece 25 are equipped with a column slot 29, and cylinder piece the other side of the connecting plate 25 is equipped with a column circular hole；The slot 29 and center of circular hole position phase It is corresponding；Cylinder piece locking device is arranged on a circular hole for piece connecting plate.

The height of I shape gasket seal 26 is identical as casing stack shell, and two end of gasket is respectively provided with a cylindrical body 28, while gasket On the lock shaft hole 39 that also passes through with locking device, which is circular hole, and after locking device is opened, T forming head 36 will hook I Grommet type seal piece and be unlikely to fall, as shown in Figure 8.

As shown in Fig. 2, Figure 13, Figure 14 and Figure 17, cylinder piece locking device 6 includes T shape lock shaft 32, spring 31, turning handle 33, spiral shell 32 one end of mother's 35, T shape lock shaft have protrusion 34 T forming head 36, other end least significant end have thread segment 38, close to thread segment at be Square section section 37.Attaching nut 35 on thread segment；Square section section 37 connects turning handle 33；Spring 31 be located at T forming head and turning handle 33 it Between.There is turning handle hole, for installing the square section section of lock shaft, turning handle 33 is connected with traction rope 60, and traction rope 60 is simultaneously on turning handle It is connected on pull rod 70, is promoted pull rod 70 by pull rod carrying handle 7, the turning handle 33 for driving traction rope 60 and being attached thereto Forced rotation, to remotely realize the unlatching of cylinder piece locking device 6.

Specifically, T shape lock shaft 32 set from cylinder piece connecting plate 25 with the matched 29 1 side neck piece connecting plate of slot of T forming head 25 penetrate, and have the cylinder piece connecting plate 25 of round hole across I shape gasket seal 26 to the other side, are detained even with T forming head protrusion 34 After fishplate bar 25 (T forming head 36 and 29 length of slot are to vertical at this time, as shown in figure 18), upper spring 31 is covered, then is put on and square section The turning handle 33 of matching, screws at nut 35 to thread segment, and continuous precession nut 35 causes spring 31 to be compressed to scheduled amount.Compression The pressure that generates of spring 31 make two connecting plates 25 lock (pressure) tightly, in locking state between cylinder piece connecting plate 25, thus with The cylinder piece and cylinder piece of cylinder piece connecting plate connection have been assembled into a stack shell 23.At this point, cylinder piece locking device 6, which is in locking, closes shape State.Traction rope 60 is connected on turning handle 33, and 60 other end of traction rope is connected on pull rod 70.When need open end can piece lock When device 6 makes stack shell 23 be separated into multiple pieces 24, pulls up lifting rod carrying handle 7 and promote pull rod 70, pass through traction rope 60 transmitting make 90 degree of 33 Forced rotation of turning handle, drive the rotation of T shape lock shaft 32, T forming head 36 go to it is consistent with 29 length direction of slot, T forming head 36 is retracted into the slot 29 on connecting plate 25 under the action of spring 31, and as shown in figure 19, cylinder piece connecting plate 25 is no longer Lock (pressure) tightly, cylinder piece locking device 6 is opened.

As shown in figure 20, in above-mentioned flange locking device 30 or cylinder piece locking device 6, pass through continuous precession nut 35 and cause Spring-compressed is to scheduled amount, when spring rate is big, when precession nut difficulty, can use the compaction tool 300 of Figure 18.It compresses Tool is by upper clamp plate 301, middle clamp plate 304 and its hole 302 more bigger than lock shaft nut 35 having, slide bar 305, base plate 306 Composition, slide bar 305 are vertically connected on base plate 306, and upper clamp plate 301 is fixedly connected on the top of slide bar 305, middle clamp plate 304 It can be moved across slide bar 305 and upper clamp plate 301 and base plate 306 along slide bar 305.Jack 307 is placed in middle clamp plate Between 304 and base plate 306.

In use, as shown in Figure 21,301 middle clamp plate 304 of upper clamp plate of compaction tool 300 is clipped into lock shaft, specifically, The folder of upper clamp plate 301 leans on T shape lock shaft T forming head 36, and the folder of middle clamp plate 304 leans on turning handle 33, and the 302 centering nut 35 of hole on middle clamp plate opens Dynamic jack 307, moves middle clamp plate 304 to upper clamp plate 301 along slide bar 305, until after having compressed spring to scheduled amount, from hole Nut 35 is screwed in 302, unclamp jack 307 and is removed, and compaction tool 300, flange locking device 30 or the locking of cylinder piece are removed Device 6 is installed.

Coxopodite casing, common casing stack shell 23 every arc tube on piece be equipped at least one lifting lug 27, for remove shield A piece is hung when cylinder.In some specific embodiments, every arc tube on piece is equipped with a lifting lug 27.

The connection between connection and common casing 20 and common casing 20 between coxopodite casing 10 and fragment type casing 20 Mode is identical, specifically, being that upper flange piece 21 at the top of the lower flange piece 22 and another stack shell by stack shell bottom is connected to one It rises, more specifically, P connector annular sealing gaskets 1 is folded between flange plate, then, cylinder is fixedly connected with by bolt 97 Adjacent flange plate up and down makes each stack shell link together between body.

As shown in Figure 6 and Figure 7, P connector annular sealing gaskets 1 is divided into multi-disc, the joint of piece and piece along perimeter fragment P-shaped is made；Multi-disc P connector annular sealing gaskets 1 is corresponding with arc tube piece 24.It if P connector, is realized when casing cylinder piece separates When, 1 separated in synchronization of P connector annular sealing gaskets.

Coxopodite casing, common 23 side wall of casing stack shell are equipped with pull rod bracket 80 and bull stick bracket 50, for installing a mortice lock Tight device pull rod 70 and flange locking device bull stick 40.Also, pull rod 40 and bull stick 70 are subsection connecting structure, every section of pull rod and Bull stick length is identical as casing stack shell height.Segmented bull stick is connected by bull stick connection structure 4, specifically, as shown in figure 15, Bull stick is connected by the way that the engaging that complements one another of the recessed plug 41 of segmented bull stick end and convex plug 42 is arranged in.Segmented pull rod 70 are connected by bar jointing structure 8, specifically, as shown in figure 16, by the sleeve 91 and countersunk head that are located at 70 port of pull rod The connection of 92 fitting of bolt.Bull stick top has bar rotation handle 3, for rotating bull stick 40.Pull rod top is lifted with pull rod Handle 7, for lifting pull rod 70.

70 end of pull rod is hung on traction rope 60 thereon by bolt and is connected with cylinder piece locking device 6；40 end of bull stick is logical The traction rope 60 that bolt is hung on thereon is crossed to be connected with flange locking device 30.

Embodiment 1:

Production:

Will construct several cast-in-place concrete piles in one waters, because of the variation of the depth of water, a length of 5~28 meters of dismountable casing. With dismountable section 1.0 meters of casing interior diameter, along perimeter equal part four.Common casing be made into 5 meters, 2 meters, it is 1 meter long, to be suitble to the depth of water Variation caused by dismountable length variation.

Common casing and coxopodite casing are all made of steel production, cylinder, flange plate, cylinder piece connecting plate, lifting lug 8 milli of thickness Rice is welded to connect.

Pull rod is square steel tube: 40 millimeters × 40 millimeters × 4 millimeters；Bull stick is round steel pipe: 48 millimeters × 3.5 millimeters of diameter.

Locking spring, 60 millimeters of diameter of bore, 8.0 thousand Ns of workload, 10 millimeters of working range.

45 millimeters of lock shaft diameter.

Cylinder piece locking device presses every 300 millimeters~400 by every 300 millimeters~400 millimeters spacing arrangements, flange locking devices Millimeter (arc length) spacing arrangement.

P joint ring grommet type seal piece, I grommet type seal piece are all made of 8 millimeters of rubber production.

One of them 7.0 meters of dismountable casing total length is measured, is pieced together and is formed by 5 meter Yi Jie of fragment type casing, 2 meter Yi Jie And it assembles.(long first each self assembly of every common casing of section altogether, then save and assemble section between saving.

Installation:

Section is not removed and lays predetermined depth, and installation top flange plate installs P joint ring grommet type seal piece, installs dismountable shield Cylinder is connected with flange locking device, continues to depress casing to predetermined depth, construction drill bored concrete pile.

It removes:

Bored pile construction is completed, and is had and is removed casing condition.Hoist rope bolt topmost the common casing of a section Lifting lug, rotate flange locking device bull stick, dismountable casing (section) with do not remove casing and separate；Again by cylinder piece locking device Pull rod pull-up, separates between cylinder piece and cylinder piece.Hoist rope is packed up, and cylinder piece is hung original position, is transferred to predetermined place, shield Cylinder is removed and is finished.

Embodiment 2:

Production:

Several cast-in-place concrete piles of constructing are needed in one saline waters, because of the variation of the depth of water, dismountable casing a length of 12~32 Rice.With dismountable section 1.8 meters of casing interior diameter, along perimeter equal part four.Fragment type casing be made into 5 meters, it is 2 meters long, 1 meter, with suitable The variation of dismountable length caused by the variation of Heshui depth.

Common casing and coxopodite casing are made of steel, and cylinder, flange plate, cylinder piece connecting plate, lifting lug are 10 millimeters thick Steel plate is welded to connect.

Pull rod is square steel tube: 40 millimeters × 40 millimeters × 4 millimeters；Bull stick is round steel pipe: 48 millimeters × 3.5 millimeters of diameter.

Locking spring, 60 millimeters of diameter of bore, 15,000 Ns of workload, 10 millimeters of working range.

45 millimeters of lock shaft diameter.

Cylinder piece locking device presses every 300 millimeters~400 by every 300 millimeters~400 millimeters spacing arrangements, flange locking devices Millimeter (arc length) spacing arrangement.

P joint ring grommet type seal piece, I grommet type seal piece are all made of 12 millimeters of rubber production.

One of them 17.0 meters of dismountable casing total length is measured, adds 2 meters to save to piece together and form by 5 meters of three sections of section.Point Two sections, lower section is made of 5 meters of one section of fragment type casing plus 2 meters each sections (growing 7 meters altogether)；Upper section plain edition casing two sections, 5 meters of groups At (growing 10 meters altogether).First every each self assembly of section casing, then save and assemble between saving lower section, upper section.

Compaction tool is welded using 6 millimeters of steel plates.50 millimeters × 50 millimeters of slide bar section out-to-out, long 350 milli Rice；Upper clamp plate is 180 millimeters, 50 millimeters × 50 millimeters of cross section out-to-out long；Middle clamp plate is 20 millimeters thick, 150 millimeters wide, long 320 millimeters, 60 millimeters of intermediate opening diameter；Bottom plate is 20 millimeters thick, 150 millimeters wide, 130 millimeters long；It is very heavy with 2 tons of lifting capacity It pushes up (product).

Installation:

Section not to be removed lays predetermined depth, installation top flange plate installs P joint ring grommet type seal piece, installs upper section casing, With the installation of compaction tool auxiliary flange locking device, connection, continue 7 meters of casing of pressure, is depressed after 10 meters of casings of upper section are installed To predetermined depth, construction drill bored concrete pile.

It removes:

Bored pile construction is completed, and is had and is removed casing condition.Hoist rope bolt topmost the common casing of a section Lifting lug, rotate flange locking device bull stick, dismountable casing (section) with do not remove casing and separate；Again by cylinder piece locking device Pull rod pull-up, separates between cylinder piece and cylinder piece.Hoist rope is packed up, and cylinder piece is hung original position, is transferred to predetermined place, shield Cylinder is removed and is finished.

Claims (6)

1. a kind of clamping tool, which is characterized in that including base plate, slide bar, upper clamp plate and middle clamp plate；The slide bar is vertically fixed On base plate；Upper clamp plate is fixedly connected on top end of sliding rod；Middle clamp plate be socketed on slide bar and can along slide bar upper clamp plate with It is moved between base plate.

2. clamping tool according to claim 1, which is characterized in that clamping tool further includes being located at middle clamp plate and base plate Between jack.

3. clamping tool according to claim 2, which is characterized in that upper clamp plate is perpendicular to slide bar, the connection of upper clamp plate end In top end of sliding rod.

4. clamping tool according to claim 3, which is characterized in that middle clamp plate is covered perpendicular to slide bar, the middle part of middle clamp plate It connects on slide bar.

5. clamping tool according to claim 4, which is characterized in that one end that middle clamp plate is located at upper clamp plate lower part has Hole.

6. clamping tool according to claim 5, which is characterized in that jack is located at the other end that middle clamp plate does not have hole Between base plate.