CN118148030A - Adjustable support jig frame and application method thereof - Google Patents

Abstract

The invention belongs to the technical field of support of building construction jig frames and discloses an adjustable support jig frame and a use method thereof. The invention aims to solve the problems of low height adjustment accuracy and high labor capacity, and the steel plate can be replaced by pulling up the component bottom by using a jack or other auxiliary tools.

Description

Adjustable support jig frame and application method thereof

Technical Field

The invention belongs to the technical field of support of building construction jig frames, and particularly relates to an adjustable support jig frame and a using method thereof.

Background

Along with the development of bridge construction in recent years, the cast-in-situ precast beam body gradually develops and evolves from the initial cast-in-situ precast beam body to an assembled type, and the application of an assembled type process in bridge construction is more and more mature, wherein the assembled type component has the advantages of stable production process, high precision, high utilization rate of automatic machinery, high production efficiency, cost saving and field saving due to factory centralized production. Due to the influence of external factors such as project types, transportation limitations and the like, the assembly type components are assembled by manufacturing specific jig frames aiming at specific products in the assembling process.

The patent with the publication number of CN219930737U discloses a portable detachable cyclic utilization bridge deck assembling jig frame, and the jig frame can realize the adjustment of the supporting height and the adjustment of the supporting distance. However, when the height of the jig frame is adjusted, steel plates can only be added or reduced on the bolster, when the bridge is assembled, integral assembly or n+1 assembly (a span of a mother tire is reserved) is often needed to be matched with the next section, for example, when the standard span is 30m, the minimum assembled section 1+1 is taken as an example, the shortest distance of one assembly is 60m, the longitudinal slope is 0.3%, the height difference is 18 centimeters, that is, the corresponding height is gradually increased from 1 meter to 60 meters until the height of 18 centimeters, the steel plates are sequentially adjusted and increased according to 0.3% of the longitudinal slope, the workload and the anti-overturning risk are very high, the pre-arch height of 1/1000-3/1000 and the transverse slope of 2% in the width direction are not needed to be adjusted, the mother tire is needed to be adjusted to the original height after each round of assembly is completed, the height of 18 centimeters is not sequentially increased during continuous assembly, and the safety risk is also increased. Therefore, the jig frame has the defects of low accuracy and high labor capacity when being adjusted in height, and the steel plate can be replaced by drawing the steel plate by supporting the component bottom by using a jack or other auxiliary tools.

Disclosure of Invention

Aiming at the problems in the prior art, the invention provides an adjustable supporting jig and a using method thereof, and aims to solve the problems that the height adjustment accuracy is low, the labor capacity is high, and a member is required to be supported by a jack or other auxiliary tools to be extracted for replacing a steel plate.

In order to solve the technical problems, the invention is realized by the following technical scheme:

The utility model provides an adjustable support bed-jig, includes the base, be rectangular array on the base and be provided with four first bracing pieces, every scalable the inserting in the first bracing piece is equipped with the second bracing piece, the upper end rotatable lid of second bracing piece is equipped with bowl type nut, bowl type nut matching connection has the screw rod, the lower extreme activity of screw rod is inserted and is located in the second bracing piece, the upper end of screw rod is connected with the backup pad.

Further, the base comprises two opposite and parallel sliding rails and a connecting rod piece for connecting the two sliding rails;

Each sliding assembly is in sliding fit with two sliding assemblies, each sliding assembly and the corresponding sliding rail can be locked and fixed, and each sliding assembly is correspondingly connected with one first supporting rod; two adjacent first support rods are connected through a connecting tie rod, and the length of the connecting tie rod between the two first support rods on the same slide rail is adjustable.

Further, the sliding rail is an I-shaped sliding rail, and the sliding assembly comprises a sliding plate arranged on the upper end face of the I-shaped sliding rail in a sliding manner and an adjustable lock catch used for locking and fixing the sliding plate to the upper end face of the I-shaped sliding rail; the sliding plate is fixedly connected with the corresponding first supporting rod.

Further, the adjustable lock catch comprises C-shaped buckles which are arranged in a mirror image mode and are pressed on the sliding plate, the top ends of the two C-shaped buckles are respectively connected with connecting plates which are arranged in a right-opposite mode, and the two connecting plates are connected through adjusting bolts;

When the sliding plate is required to be locked and fixed to the upper end face of the I-shaped sliding rail, the adjusting bolt is adjusted to pull the two connecting plates to be close to each other, so that the two C-shaped buckles are respectively clamped on two sides of the upper end face of the I-shaped sliding rail.

Further, the connecting tie rod between the two first support rods on the same slide rail comprises a sleeve and telescopic rods which are connected to two ends of the sleeve in a telescopic mode, one telescopic rod is connected with one first support rod at one end deviating from the sleeve, and the other telescopic rod is connected with the other first support rod at one end deviating from the sleeve.

Further, the sleeve is in threaded connection with the corresponding telescopic rod.

Further, each first support rod is provided with an ear plate, and the connecting tie rod is connected with the corresponding first support rod through the ear plate.

Further, two adjacent first support rods are connected through two connecting tie bars which are arranged in an X shape.

Further, the first support rod and the second support rod are provided with elevation adjusting holes, and the first support rod and the second support rod are connected in a telescopic manner by inserting bolts into the elevation adjusting holes right opposite to the first support rod and the second support rod.

Further, a rotating handle is arranged on the bowl-shaped nut.

A method of using an adjustable support jig comprising:

placing the base below a body to be supported, and placing the body to be supported on the supporting plate;

the second supporting rod is controlled to extend or retract into the first supporting rod, so that coarse adjustment of the height is achieved;

The bowl-shaped nut is controlled to rotate clockwise or anticlockwise to drive the screw rod to ascend or descend, so that high-precision adjustment is achieved.

Compared with the prior art, the invention has at least the following beneficial effects:

The invention provides an adjustable supporting jig frame, which is characterized in that firstly, a base is placed below a body to be supported, and the body to be supported is placed on a supporting plate; then, the second support rod is controlled to extend or retract to the first support rod, so that the coarse adjustment of the height is realized; finally, the bowl-shaped nut is controlled to rotate clockwise or anticlockwise to drive the screw rod to ascend or descend, so that the high-precision adjustment is realized. Namely, when the height is adjusted, the first support rod and the second support rod can be used for rough adjustment in a telescopic mode. After the rough adjustment is finished, according to the actual construction condition, the bowl-shaped nut is rotated to drive the screw rod to ascend or descend, so that the fine adjustment is realized. Because bowl type nut passes through threaded fit with the screw rod and is connected, so when carrying out high fine setting, the regulation precision is high, can satisfy the construction requirement of refining, and just need only to revolve the operation process of twisting bowl type nut and can realize high fine adjustment, need not to adopt appurtenance such as jack with waiting to support the body jack-up, has improved work efficiency, has reduced the amount of labour.

In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is an overall isometric view of an adjustable support jig according to an embodiment of the invention;

FIG. 2 is a front view of an adjustable support jig according to an embodiment of the invention;

FIG. 3 is an isometric view of a coarse tuning structure and a fine tuning structure in an adjustable support jig according to an embodiment of the invention;

FIG. 4 is an isometric view of a slide assembly in an adjustable support jig engaged with a slide rail according to an embodiment of the invention;

fig. 5 is a front view of an adjustable lock catch in an adjustable support jig according to an embodiment of the invention.

In the figure: 1-a base; 100-sliding rails; 101-connecting a rod piece; 2-a first support bar; 3-a second support bar; 4-bowl-shaped nuts; 5-screw; 6-supporting plates; 7-a sliding assembly; 700-skateboard; 701-an adjustable lock catch; 701a-C shaped clasp; 701 b-connecting plates; 701 c-adjusting bolts; 8-connecting tie bars; 800-sleeve; 801-telescoping rod; 9-ear plates; 10-elevation adjusting holes; 11-a bolt; 12-turning the handle.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Referring to fig. 1, fig. 2 and fig. 3, an embodiment of the application provides an adjustable supporting jig, which comprises a base 1, wherein four first supporting rods 2 are arranged on the base 1 in a rectangular array, a second supporting rod 3 is telescopically inserted in each first supporting rod 2, a bowl-shaped nut 4 is arranged on a rotatable cover at the upper end of the second supporting rod 3, a screw rod 5 is connected with the bowl-shaped nut 4 in a matched manner, the lower end of the screw rod 5 is movably inserted in the second supporting rod 3, and a supporting plate 6 is connected with the upper end of the screw rod 5.

In other words, the adjustable supporting jig frame can meet the supporting requirements in various occasions. The jig mainly comprises a base 1, a first supporting rod 2, a second supporting rod 3, a bowl-shaped nut 4, a screw 5 and a supporting plate 6. The base 1 is used as the foundation of the whole supporting jig frame, is firm and stable in design and can effectively bear the weight of the whole jig frame. On base 1, be rectangular array and be provided with four first bracing pieces 2, such design has not only guaranteed the stability of bed-jig, has also made things convenient for simultaneously adjusting the whole height of bed-jig. Each second supporting rod 3 can be telescopic in the corresponding first supporting rod 2, and the height of the jig frame can be flexibly adjusted according to the requirement by the design. Meanwhile, the upper end of the second supporting rod 2 is provided with a rotatable cover provided with a bowl-shaped nut 4, and the bowl-shaped nut 4 is designed to be tightly matched with the second supporting rod 3 so as to prevent deviation in the rotation process. The bowl-shaped nut 4 is connected with a screw 5 in a matching way, and the screw 5 can be driven to move up and down by rotating the bowl-shaped nut 4. The lower end of the screw 5 is movably inserted into the second supporting rod 3, so that the screw 5 can perform stable lifting movement in the second supporting rod 3. Meanwhile, the upper end of the screw 5 is connected with the supporting plate 6, the supporting plate 6 is used as a bearing surface of the whole jig frame, and the design is smooth and firm, so that articles needing to be supported can be effectively borne.

For example, the bowl-shaped nut 4 may be directly covered on top of the second support rod 3. Of course, the bowl nut 4 can be smoothly rotated by connecting the bowl nut and the bowl nut by adopting a bearing.

In the use process, the base 1 is placed below the body to be supported, and the body to be supported is placed on the supporting plate 6; the second support rod 3 is controlled to extend or retract into the first support rod 2, so that the coarse adjustment of the height is realized; by controlling the bowl-shaped nut 4 to rotate clockwise or anticlockwise, the driving screw 5 is driven to ascend or descend, so that the fine adjustment of the height is realized. That is, the user can adjust the telescopic length of the combination of the first support bar 2 and the second support bar 3 as required, thereby achieving a rough adjustment of the overall height of the jig frame. Meanwhile, by rotating the bowl-shaped nut 4, the driving screw 5 moves up and down, so that fine adjustment of the height of the supporting plate 6 can be realized, and different supporting requirements can be met. The adjustable support jig frame can be suitable for various construction working conditions requiring fine adjustment, and meanwhile, the adjustable support jig frame is simple in structure and convenient to operate, so that a user can easily get on hand in the using process, and the working efficiency is improved. The adjustable supporting jig frame is supporting equipment with comprehensive functions, simple and convenient operation and strong stability, and is suitable for various occasions needing flexible adjustment of supporting height.

Preferably, as shown in fig. 2, a rotating handle 12 is arranged on the bowl-shaped nut 4, so that the bowl-shaped nut is convenient to hold and rotate.

In one embodiment, as shown in fig. 1, the base 1 includes two opposite and parallel sliding rails 100, and a connecting rod 101 connecting the two sliding rails 100. For example, two parallel sliding rails 100 are respectively connected with a connecting rod 101 near two ends, and two ends of the connecting rod 101 are detachably connected with the corresponding sliding rails 100, for example, the two ends are connected by adopting a connecting block and a bolt in a matching manner.

Each sliding rail 100 is provided with two sliding components 7 in sliding fit, each sliding component 7 and the corresponding sliding rail 100 can be locked and fixed, and each sliding component 7 is correspondingly connected with a first supporting rod 2. Two adjacent first support rods 2 are connected by a connecting tie rod 8, and the length of the connecting tie rod 8 between the two first support rods 2 on the same slide rail 100 is adjustable.

Specifically, when the distance between the two first support rods 2 on the same slide rail 100 needs to be adjusted, firstly, the locking state of the sliding components 7 and the corresponding slide rail 100 is released, the distance between the two sliding components 7 is changed to the required distance, and meanwhile, the length of the connecting tie rod 8 is adjusted; finally, the sliding assembly 7 is locked and fixed on the corresponding sliding rail 100, so that the distance between two adjacent first supporting rods 2 can be quickly adjusted to adapt to different supporting requirements.

Compared with the steel plate used as the jig frame foundation, the base 1 of the embodiment is more stable in support and saves materials. Specifically, if the steel plate foundation is adopted and needs to be fully paved, the consumption of the steel plate is very large, the steel plate is connected with the support column in a bolt mode, holes are formed according to actual requirements of the site, the formed holes cannot be recycled, and the large-area holes are formed, so that labor is wasted, and the strength of the steel plate is reduced. And when the high bolt is fixed with the steel plate, after the steel plate is suspended, the nut is fixed below the steel plate to fasten the high bolt, usually the outer leakage wire of the high bolt is 2-3 wires, the exposed wire is more in contact with the ground if the exposed wire is more buckled, the steel plate cannot be suspended closely to the ground to play a role of not taking a foundation, and the outer leakage wire is short and cannot be fastened. Therefore, compared with the prior art, the base design of the embodiment not only can flexibly adjust the distance, be recycled, and has stable and reliable structure, but also has low cost.

Preferably, as shown in fig. 4 and 5, the sliding rail 100 is an i-shaped sliding rail, and the sliding assembly 7 includes a sliding plate 700 slidably disposed on an upper end surface of the i-shaped sliding rail, and an adjustable lock 701 for locking and fixing the sliding plate 700 to the upper end surface of the i-shaped sliding rail; the sliding plate 700 is fixedly connected with the corresponding first supporting bar 2. The I-shaped sliding rail is made of double-spliced I-steel by way of example.

That is, the locking and fixing state or the unlocking state between the sliding plate 700 and the i-shaped sliding rail can be realized by controlling the adjustable lock 701.

As a preferred embodiment, referring to fig. 4 and 5, the adjustable lock 701 includes C-shaped buckles 701a arranged in mirror image and pressed on the slide plate 700, the top ends of the two C-shaped buckles 701a are respectively connected with connecting plates 701b arranged opposite to each other, and the two connecting plates 701b are connected by an adjusting bolt 701C. Specifically, when the slide plate 700 needs to be locked and fixed to the upper end surface of the i-shaped slide rail, the adjusting bolt 701C pulls the two connecting plates 701b to approach each other, so as to drive the two C-shaped buckles 701a to be respectively clamped on two sides of the upper end surface of the i-shaped slide rail.

In other words, the present embodiment adopts a simple design similar to a hoop, so that the connection state between the slide plate 700 and the i-shaped slide rail can be conveniently and rapidly controlled, and when the two connecting plates 701b are pulled close to each other by the control adjusting bolt 701C, the two connecting plates 701b respectively drive the corresponding C-shaped buckles 701a to approach each other until the two C-shaped buckles 701a are respectively clamped at two sides of the upper end surface of the i-shaped slide rail, so that the locking and fixing can be realized. When the locking is required to be released, the adjusting bolt 701c is only required to be reversely screwed for unlocking.

Preferably, a chamfer is provided inside the C-shaped buckle 701a, and when the adjusting bolt 701C pulls the two connection plates 701b toward each other, the clamping will be more and more tight, and even when the connection plate bottom plate is deformed or the thickness deviation of the connection plate is too large, the clamping of the C-shaped buckle 701a can be ensured.

In an embodiment, as shown in fig. 1 and 2, the connecting tie rod 8 between two first support rods 2 on the same slide rail 100 includes a sleeve 800 and telescopic rods 801 telescopically connected to two ends of the sleeve 800, one end of the telescopic rod 801 facing away from the sleeve 800 is connected to one first support rod 2, and the other end of the telescopic rod 801 facing away from the sleeve 800 is connected to the other first support rod 2. That is, the length adjustment of the connecting tie bar 8 is achieved by extending the telescopic rod 801 into or out of the sleeve 800, compared with the arrangement of a plurality of ear plates around the support column, the design mode of the embodiment is simpler to operate and control and has low design cost (because the number of the ear plates is large, and labor and time are wasted in processing) because the ear plates are fixed and the length of the X connecting system is also fixed, and the distance can be adjusted only by changing the connection positions of the ear plates.

Preferably, as shown in fig. 2, the sleeve 800 is screwed with the corresponding telescopic rod 801, that is, the length of the connecting tie rod 8 can be adjusted quickly by screwing, and the reliability of the screwing is high.

Illustratively, an internal thread is provided in the sleeve 800, and an external thread is provided at the end of the telescoping rod 801 connected to the sleeve 800, which are in threaded connection. It should be appreciated that the threads on the two telescoping rods 801 are threaded in opposite directions.

Preferably, as shown in fig. 1 to 3, an ear plate 9 is provided on each first support rod 2, and the connection tie rod 8 is connected to the corresponding first support rod 2 through the ear plate 9. In more detail, the connecting tie rod 8 is connected to the ear plate 9 by a bolt assembly. The ear plate 9 is illustratively fixed to the first support bar 2 by means of welding.

More preferably, as shown in fig. 1 and 2, two adjacent first support rods 2 are connected through two connecting tie rods 8 which are arranged in an X shape, so that the stress is better, and the connection reinforcement is more reliable.

In an embodiment, as shown in fig. 1 to 3, elevation adjusting holes 10 are formed in the first support rod 2 and the second support rod 3, and bolts 11 are inserted into the elevation adjusting holes 10 opposite to the first support rod 2 and the second support rod 3, so that the first support rod 2 and the second support rod 3 can be connected in a telescopic manner, and the adjustment is convenient. Illustratively, the elevation adjustment holes 10 are uniformly formed.

In the supporting jig provided by the embodiment, after the positions of the supporting rods are adjusted, the four supporting rods are fixed with the sliding rail through the sliding component, and according to the fact that the assembled components are integrally assembled or n+1 segments are needed for the segments to be assembled, the bridge is ensured to be linear, longitudinal slope and pre-arched, and the elevation is adjusted according to the elevation. In the face of beam bridge blocks with different section heights and different spans, if a long line method is adopted for assembly or integral assembly or a longitudinal slope is larger, a supporting rod (coarse adjustment) +bowl-shaped nut and a screw rod (fine adjustment) are needed to be matched with each other to adjust the elevation, and the measured line type, the transverse slope, the longitudinal slope and the pre-arching value are adjusted by a fine adjustment structure according to the design values of each point, so that the beam bridge blocks meet the design requirement, and the beam bridge blocks are more accurate and convenient to operate compared with the traditional method for adjusting elevation by increasing and decreasing steel plates. For the assembly of bridges with complex space structures such as large-scale and extra-large-scale beam bridges, if the distance needs to be adjusted according to the stress points of the beam plates, the relative position of the support rods can be adjusted on the double-assembly I-steel base at will according to the required distance, and the connecting tie bars are correspondingly lengthened or shortened to be connected with the lug plates on the support rods, so that the beam bodies with different stress points in different forms can be conveniently and rapidly adjusted; when the bridge deck plate is large in space size and unstable in structural irregular variable stress, multiple groups of supporting jig frames can be additionally arranged, the supporting jig frames of all groups are connected by utilizing connecting tie bars, assembly can be completed without adding other auxiliary measures, the working procedure is simple and convenient, assembly type construction can be achieved, the material recycling rate is improved, and the construction efficiency is improved. The support rod and the ground are paved with double-spliced I-shaped steel rails, the support rod and the connecting tie rod are detachably and telescopically connected, and the double-spliced I-shaped steel rails can be selectively used according to specific situations on site, and are convenient to install and detach and capable of being recycled.

In the description of the present invention, it should be understood that the directions or positional relationships indicated by the terms "upper", "lower", "bottom", "inner", "outer", etc., are based on the directions or positional relationships shown in the drawings, are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and the like are to be construed broadly, and may be fixedly connected, detachably connected, or integrally formed, for example; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

For purposes of this disclosure, the terms "one embodiment," "some embodiments," "example," "a particular example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.

Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. The utility model provides an adjustable support bed-jig, its characterized in that, includes base (1), be rectangle array on base (1) and be provided with four first bracing pieces (2), every scalable in first bracing piece (2) is inserted and is equipped with second bracing piece (3), the upper end rotatable lid of second bracing piece (3) is equipped with bowl type nut (4), bowl type nut (4) matching is connected with screw rod (5), the lower extreme activity of screw rod (5) is inserted and is located in second bracing piece (3), the upper end of screw rod (5) is connected with backup pad (6).

2. An adjustable support matrix according to claim 1, characterized in that said base (1) comprises two slide rails (100) facing each other and arranged in parallel, and a connecting rod (101) connecting two of said slide rails (100);

Each sliding rail (100) is in sliding fit with two sliding assemblies (7), each sliding assembly (7) and the corresponding sliding rail (100) can be locked and fixed, and each sliding assembly (7) is correspondingly connected with one first supporting rod (2); two adjacent first support rods (2) are connected through a connecting tie rod (8), and the length of the connecting tie rod (8) between the two first support rods (2) positioned on the same sliding rail (100) is adjustable.

3. An adjustable support jig according to claim 2, wherein the slide rail (100) is an i-shaped slide rail, the sliding assembly (7) comprises a slide plate (700) slidably provided on an upper end surface of the i-shaped slide rail, and an adjustable lock catch (701) for locking and fixing the slide plate (700) to the upper end surface of the i-shaped slide rail; the sliding plate (700) is fixedly connected with the corresponding first supporting rod (2).

4. An adjustable support jig according to claim 3, wherein the adjustable lock catch (701) comprises C-shaped buckles (701 a) which are arranged in a mirror image and are pressed on the sliding plate (700), the top ends of the two C-shaped buckles (701 a) are respectively connected with a connecting plate (701 b) which is arranged opposite to each other, and the two connecting plates (701 b) are connected through an adjusting bolt (701C);

When the sliding plate (700) is required to be locked and fixed to the upper end face of the I-shaped sliding rail, the adjusting bolt (701C) is adjusted to pull the two connecting plates (701 b) to be close to each other, so that the two C-shaped buckles (701 a) are driven to be respectively clamped on two sides of the upper end face of the I-shaped sliding rail.

5. An adjustable support matrix according to claim 2, characterized in that the connecting tie rod (8) between the two first support rods (2) on the same slide rail (100) comprises a sleeve (800) and telescopic rods (801) telescopically connected to the two ends of the sleeve (800), one end of the telescopic rod (801) facing away from the sleeve (800) being connected to one of the first support rods (2) and the other end of the telescopic rod (801) facing away from the sleeve (800) being connected to the other first support rod (2).

6. An adjustable support matrix according to claim 5, wherein said sleeve (800) is screwed with the corresponding telescopic rod (801).

7. An adjustable support matrix according to claim 2, characterized in that each first support bar (2) is provided with an ear plate (9), the connection tie bars (8) being connected to the corresponding first support bar (2) by means of the ear plates (9).

8. An adjustable support matrix according to claim 2, characterized in that two adjacent first support bars (2) are connected by two connection tie bars (8) arranged in an X-shape.

9. An adjustable support jig according to claim 1, wherein the first support bar (2) and the second support bar (3) are provided with elevation adjusting holes (10), and the first support bar (2) and the second support bar (3) are connected in a telescopic manner by inserting bolts (11) into the elevation adjusting holes (10) opposite to each other on the first support bar (2) and the second support bar (3).

10. A method of using an adjustable support jig according to any one of claims 1 to 9, comprising:

placing the base (1) below a body to be supported and placing the body to be supported on the supporting plate (6);

The second supporting rod (3) is controlled to extend or retract the first supporting rod (2), so that the coarse adjustment of the height is realized;

The bowl-shaped nut (4) is controlled to rotate clockwise or anticlockwise, so that the screw rod (5) is driven to ascend or descend, and high-precision adjustment is achieved.