CN205999794U - High pier pier top Cast-in-place concrete bracket precompressed charger - Google Patents
High pier pier top Cast-in-place concrete bracket precompressed charger Download PDFInfo
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- CN205999794U CN205999794U CN201620863756.3U CN201620863756U CN205999794U CN 205999794 U CN205999794 U CN 205999794U CN 201620863756 U CN201620863756 U CN 201620863756U CN 205999794 U CN205999794 U CN 205999794U
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- jack
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Abstract
A kind of high pier pier top Cast-in-place concrete bracket precompressed charger, belong to field of bridge construction, including the first reaction frame, second reaction frame, first jack and the second jack, first reaction frame and the second reaction frame are respectively arranged in the both sides of high pier pier top, first reaction frame and the second reaction frame are respectively arranged with the first counter-force portion and the second counter-force portion, first counter-force portion and the second counter-force portion stretch out high pier pier top respectively and are located above the concrete bracket of both sides, first jack is arranged between the first concrete bracket and the first counter-force portion, second jack is arranged between the second counter-force portion and the second concrete bracket.This high pier pier top Cast-in-place concrete bracket precompressed charger easily controls the prefabricating load balance of pier stud both sides, while facilitating prefabricating load fast discharging on bracket, eliminate the potential safety hazard that concrete bracket deformation is produced, the use of personnel and machinery in work progress can also be greatly reduced, so as to shorten construction period, reduce construction cost.
Description
Technical field
The utility model is related to field of bridge construction, adds in particular to a kind of high pier pier top Cast-in-place concrete bracket precompressed
Carry and put.
Background technology
In bridge construction process, the support that can be usually pointed to bridge cantilever position carries out precompressed construction.But, existing
High pier pier top cast-in-place concrete bracket precompressed construction method be mostly using water tank draw water precompressed or place weight piling prepressing,
There is problems with above-mentioned prepressing device and method：
1. as prefabricating load is larger, precompressed construction area is less so that precompressed water tank is higher, each rank in pier stud both sides
Bracket deformation under prefabricating load is not easy to observation, and the prefabricating load of precompressed pier stud both sides balances bad control, work progress
Middle personnel and machinery are using more.
2. in bracket pre-compaction process, when such as bracket deformation occurs abnormal, slow to bracket discharge rate, it is impossible to eliminate in time latent
In dangerous matter sources.
3. as prefabricating load is larger, the precompressed thing required for precompressed is more, there is high-altitude in precompressed thing hoisting process
Potential safety hazard, and crane can only be loaded in turn to pier stud both sides, caused eccentric compression to pier stud, easily made pier stud tension
Side is ftractureed, and in work progress, personnel and machinery use more, long construction period, high cost.
Utility model content
The purpose of this utility model is to provide a kind of high pier pier top Cast-in-place concrete bracket precompressed charger, and which can be light
The prefabricating load balance of ground control pier stud both sides, facilitates the fast quick-detach of the prefabricating load on bracket, eliminates safe hidden trouble in time,
While the use of personnel and machinery can be greatly reduced, shorten construction period, reduce construction cost.
Embodiment of the present utility model is realized in：
A kind of high pier pier top Cast-in-place concrete bracket precompressed charger, it include the first reaction frame, the second reaction frame, the 1000th
Jin top and the second jack, the first reaction frame and the second reaction frame are respectively arranged in the both sides of high pier pier top, the first reaction frame
The first counter-force portion and the second counter-force portion are respectively arranged with the second reaction frame, the both sides of high pier pier top are respectively arranged with the first concrete support
Frame and the second concrete bracket, the first counter-force portion stretch out high pier pier top and are located above the first concrete bracket, and the first jack may be contained within
Between first concrete bracket and the first counter-force portion, the second counter-force portion stretches out high pier pier top and is located above the second concrete bracket, the 2000th
Jin top is may be contained between the second counter-force portion and the second concrete bracket.
The beneficial effect of the utility model embodiment is：
This high pier pier top Cast-in-place concrete bracket precompressed charger using Gao Dun both sides arrange the reaction frame that cooperates and
Jack pair concrete bracket carries out the mode of precompressed, and associative operation personnel can easily control pier stud both sides by manipulating jack
Prefabricating load balance, while facilitate prefabricating load fast discharging on bracket, eliminate the potential safety hazard that concrete bracket deformation is produced,
The use of personnel and machinery in work progress can also be greatly reduced, so as to shorten construction period, reduce construction cost, make up existing
There is the defect of technology.
Description of the drawings
In order to be illustrated more clearly that the technical scheme of the utility model embodiment, below will be to using needed for embodiment
Accompanying drawing be briefly described, it will be appreciated that the following drawings illustrate only some embodiments of the present utility model, therefore should be by
Regard the restriction to scope as, for those of ordinary skill in the art, on the premise of not paying creative work, may be used also
To obtain other related accompanying drawings according to these accompanying drawings.
The structural representation of the high pier pier top Cast-in-place concrete bracket precompressed charger that Fig. 1 is provided for the utility model embodiment
Figure；
Another visual angle of the high pier pier top Cast-in-place concrete bracket precompressed charger that Fig. 2 is provided for the utility model embodiment
Structural representation；
The structural representation of the first reaction frame that Fig. 3 is provided for the utility model embodiment.
Reference collects：
High pier pier top Cast-in-place concrete bracket precompressed charger 100；
First reaction frame 110；
I-steel 111；
Second reaction frame 120；
First jack 130；
Second jack 140；
First distribution girder construction 150；
First transverse distribution beam 151；
First longitudinal direction distribution beam 152；
Second distribution girder construction 160；
Second transverse distribution beam 161；
Second longitudinal direction distribution beam 162；
First anchor rib 170；
First mounting rail 171；
First nut 172；
Second anchor rib 180；
Second mounting rail 181；
Second nut 182；
High pier pier top 200；
First concrete bracket 300；
Second concrete bracket 400；
First supporting leveling block 500；
Second supporting leveling block 600.
Specific embodiment
Existing high pier pier top Cast-in-place concrete bracket precompressed construction method be substantially with water tank draw water precompressed or place weight
, there are shortcomings in piling prepressing：
1. waste significantly a large amount of artificial.Prefabricating load must weigh 1.05～1.1 times with actual beam and be applied, and precompressed
Load all on bracket, must need the weight for loading more by uniform load.
2. difficulty of construction increased.As work high above the ground, the larger lotus of preloading particularly on the less bracket of working area
The precompressed construction of load, weight stacking height are higher, and operating personnel's personal safety there is also hidden danger.
3. many construction major hazard sources increased.Including falling from high altitude, cave in etc..
4. high-pier bracket precompressed is constructed, as height surpasses 100 meters, very big using conventional method difficulty, it is difficult to do
Eccentric compression is not received to pier stud.
5. bracket deformation observation difficulty is big.The precompressed construction of the larger load of preloading, bracket on the less bracket of working area
On observation station lay more difficult.
6., in bracket pre-compaction process, when such as bracket deformation occurs abnormal, slow to bracket discharge rate, potentially danger is relatively
Greatly.
For above-mentioned situation, a kind of high pier pier top Cast-in-place concrete bracket precompressed charger 100, its energy is present embodiments provided
The problems referred to above are enough effectively improved.
Purpose, technical scheme and advantage for making the utility model embodiment is clearer, new below in conjunction with this practicality
Accompanying drawing in type embodiment, is clearly and completely described to the technical scheme in the utility model embodiment.
Fig. 1-2 is refer to, the present embodiment provides a kind of high pier pier top Cast-in-place concrete bracket precompressed charger 100, and which includes
Three the first jack 130 of the second reaction frame 120, three of the first reaction frame 110, three and three the second jack 140, three
Individual reaction frame 110 is corresponded with three the first jack 130, three the second reaction frames 120 and three the second jack 140 1
One corresponds to.
Wherein, above-mentioned first reaction frame 110 and the second reaction frame 120 can refer to figure using variously-shaped and construction
3, in the present embodiment, the first reaction frame 110 and the second reaction frame 120 are all to be welded the truss knot for being formed by many I-steel 111
Structure.Above-mentioned truss structure includes multiple triangular frame structure, multiple triangular frame structure along its length direction interval setting and
Coupled together by many girder steels.Said structure has easy to process, little, the high feature of intensity of conducting oneself with dignity.
First reaction frame 110 and the second reaction frame 120 are respectively arranged in the relative both sides of high pier pier top 200.First counter-force
The mode that frame 110 and the second reaction frame 120 are installed has a lot, in the present embodiment, the first reaction frame 110 and the second reaction frame 120
It is installed in height pier top, specifically by anchor rib and nut, on the first reaction frame 110, is provided with two first mounting rails
171,；Two first mounting rails 171 are parallel to each other and interval setting, and two first mounting rails 171 all push down the first reaction frame 110
Bottom.Many first anchor ribs 170 are provided with high pier pier top 200, and many first anchor ribs 170 are all vertically arranged and bottom
High pier pier top 200 is embedded in advance, and top through the first mounting rail 171 and is connected with the first nut 172,172 points of multiple first nuts
The upper surface of two piece first mounting rails 171 is not pushed down.
Two second mounting rails 181 are provided with second reaction frame 120, and two mounting rails are parallel to each other and interval setting,
Two second mounting rails 181 push down the bottom of the second reaction frame 120, are provided with many second anchor ribs in high pier pier top 200
180, many second anchor ribs 180 are all vertically arranged and bottom is embedded in high pier pier top 200 in advance, and top passes through the second mounting rail 181
And the second nut 182 is connected with, multiple second nuts 182 push down the upper surface of two second mounting rails 181 respectively.
The purpose for installing and fixing the first counter-force and the second reaction frame 120 using said structure and mode is its structure letter
Single, it is convenient to mount and dismount, the stability of the first reaction frame 110 and the second reaction frame 120 can be effectively ensured.
In order to reduce the installation cost of the first reaction frame 110 and the second reaction frame 120, in the present embodiment, many first peaces
Dress beam 171 and multiple second mounting rails 181 all select I-steel, many first anchor ribs 170 and the second anchor rib 180 all to select
Fining twisted steel, to reduce becoming for installation as far as possible while the first reaction frame 110 and the second 120 intensity of reaction frame is ensured
This.The concrete size of fining twisted steel determines according to the actual requirements, such as the fining twisted steel of the 28mm selected in the present embodiment.
First reaction frame 110 and the second reaction frame 120 carry out leveling when mounted for convenience, in the present embodiment, high pier
Pier top Cast-in-place concrete bracket precompressed charger 100 also includes the multiple first supporting leveling blocks 500 and multiple second supporting leveling blocks
600.Multiple first supporting leveling blocks 500 are may be contained between the first reaction frame 110 and high pier pier top 200, and are supported on first
The bottom of reaction frame 110 may be contained within the second reaction frame away from the position in the first counter-force portion, multiple second supporting leveling blocks 600
Between 120 and high pier pier top 200, and be supported on the bottom of the second reaction frame 120 away from the second counter-force portion position.
The purpose for arranging the first supporting leveling block 500 and the second supporting leveling block 600 is to realize to the first reaction frame 110
With the supporting of the second reaction frame 120, the first reaction frame 110 and the second reaction frame 120 is facilitated to carry out leveling when installing.
In the present embodiment, the first reaction frame 110 and the second reaction frame 120 are respectively arranged with the first counter-force portion and the second counter-force
Portion, correspondingly, high pier pier top 200 is respectively arranged with the first concrete bracket 300 and second less than the both sides of the position of six reaction frames
Concrete bracket 400.High pier pier top 200 is stretched out in vacant state by first counter-force portion, and is placed exactly on the first concrete bracket 300
Side, the first jack 130 are all arranged at intervals at the first concrete bracket 300 and the first counter-force along the length direction of the first reaction frame 110
Between portion；High pier pier top 200 is stretched out in vacant state by second counter-force portion, and is located at 400 top of the second concrete bracket, and the 2000th
Jin top 140 is arranged at intervals between the second counter-force portion and the second concrete bracket 400 along the length direction of the second reaction frame 120.
Above-mentioned first jack 130 and the second jack 140 can select various structures and type, in the present embodiment, the
One jack 130 and the second jack 140 all adopt hydraulic jack, and correspondingly, high pier pier top Cast-in-place concrete bracket precompressed is loaded
Device 100 is also equipped with hydraulic oil pump, and the first jack 130 is connected with hydraulic oil pump respectively with the second jack 140.From hydraulic pressure
The purpose of jack be its have simple structure, lightweight, be easy to carry, conveniently moving, easy to operate feature, Ke Yicong
Largely facilitate manipulation of the user to jack, construct so as to easily realize the precompressed to concrete bracket.
In order to improve the uniformity that 130 pairs of the first concrete brackets 300 of the first jack exert a force, in the present embodiment, the first concrete support
It is provided with the first distribution girder construction 150 on frame 300, the first distribution girder construction 150 includes many first transverse distribution beams 151 and many
Root first longitudinal direction distribution beam 152, many first transverse distribution beams 151 are placed on the first concrete bracket 300, many first longitudinal directions
Distribution beam 152 is positioned on many first transverse distribution beams 151, and the first jack 130 is respectively arranged at multiple first longitudinal directions and divides
Join at the point midway of beam 152.
Correspondingly, in order to improve the uniformity that 140 pairs of the second concrete brackets 400 of the second jack exert a force, the second concrete bracket 400
On be provided with the second distribution girder construction 160, the second distribution girder construction 160 includes many second transverse distribution beams 161 and Duo Gen the
Two longitudinal distribution beam 162, many second transverse distribution beams 161 are placed on the second concrete bracket 400, many second longitudinal direction distribution
Beam 162 is positioned on many second transverse distribution beams 161, and the second jack 140 is respectively arranged at multiple second longitudinal direction distribution beam
On 162.
The purpose for arranging the first distribution girder construction 150 and the second distribution girder construction 160 is prefabricating load transmission distribution
To on the first concrete bracket 300 and the second concrete bracket 400, the stress so as to improve the first concrete bracket 300 and the second concrete bracket 400 is equal
Even property, it is ensured that the stability of two concrete bracket precompressed constructions.
The operation principle and process of this high pier pier top Cast-in-place concrete bracket precompressed charger 100 is such：First, respectively
First is installed on the first concrete bracket 300 and the second concrete bracket 400 distributes girder construction 150 and the second distribution girder construction 160；So
Afterwards, the first reaction frame 110 and the second reaction frame 120 are hung the installation site of high pier pier top 200 using hoisting machinery, by
One supporting leveling block 500 and the second supporting leveling block 600 by after the first reaction frame 110 and 120 adjustment level of the second reaction frame, by
First anchor rib 170, the second anchor rib 180, the first mounting rail 171, the second mounting rail 181, the first nut 172 and the second nut
First reaction frame 110 and 120 middle part compression of the second reaction frame are anchored by 182；Afterwards hydraulic oil pump is placed in height pier top, and
First jack 130 is installed between the first reaction frame 110 and the first concrete bracket 300, in the second reaction frame 120 and the second concrete support
Second jack 140 is installed between frame so that multiple jack centers are overlapped with corresponding reaction frame axis, and adjusts
One jack 130 and 140 level of the second jack；Finally start hydraulic oil pump, the claw of the first jack 130 is raised and props up the
First counter-force portion of one reaction frame 110, then under the reaction force in the first counter-force portion, the base of the first jack 130 is to
One concrete bracket 300 applies pressure, and correspondingly, the claw of the second jack 140 raises the second counter-force for propping up the second reaction frame 120
Portion, then under the reaction force in the second counter-force portion, the base of the second jack 140 applies pressure to the second concrete bracket 400, applies
Plus pressure increase with the operation of operating personnel step by step, construct so as to realize the precompressed to 200 both sides concrete bracket of high pier pier top.
In sum, this high pier pier top Cast-in-place concrete bracket precompressed charger 100 is very heavy using six reaction frames and six
Top coordinates the mode for carrying out precompressed to concrete bracket, and associative operation personnel can easily control pier stud both sides by manipulating jack
Prefabricating load balance, while facilitate prefabricating load fast discharging on bracket, eliminate the potential safety hazard that concrete bracket deformation is produced,
The use of personnel and machinery in work progress can also be greatly reduced, so as to shorten construction period, reduce construction cost, make up existing
There is the defect of technology.
Meanwhile, this high pier pier top Cast-in-place concrete bracket precompressed charger 100 has further the advantage that：
1. the material for being used is fewer, has accomplished materials saving；2. technique is simplified, simple to operate.Only need to be by bracket
Overall prepressing device is required to install according to shown, needs six people to carry out oil pump operation in operating process；3. avoid
Prefabricating load lifting work high above the ground, reduces many major hazard sources；4. in the construction of high pier stud, as height surpasses 100 meters,
In the case of large lifting equipment, without the need for crossing multioperation, you can realize bracket precompressed construction.
Finally, in addition it is also necessary to explanation, in other embodiments, the first reaction frame 110, the second reaction frame the 120, the 1000th
The quantity of the 130, the 4th jack 140 of jin top is it can also be provided that other numerical value, are such as two or are four, specifically
Determine according to the actual requirements.
Obviously, described embodiment is a part of embodiment of the utility model, rather than whole embodiments.Generally exist
The component of the utility model embodiment described and illustrated in accompanying drawing can be arranged and be designed with a variety of configurations herein.
Therefore, the detailed description of embodiment of the present utility model below to providing in the accompanying drawings is not intended to limit requirement
The scope of the present utility model of protection, but it is merely representative of selected embodiment of the present utility model.Based in the utility model
Embodiment, the every other embodiment obtained under the premise of creative work is not made by those of ordinary skill in the art, all
Belong to the scope of the utility model protection.
It should be noted that：Similar label and letter represent similar terms in following accompanying drawing, therefore, once a certain Xiang Yi
It is defined in individual accompanying drawing, then which need not be defined further and explain in subsequent accompanying drawing.
In description of the present utility model, it should be noted that term " " center ", " on ", D score, "left", "right", " perpendicular
Directly ", the orientation of instruction such as " level ", " interior ", " outward " or position relationship be based on orientation shown in the drawings or position relationship, or
The utility model product using when the orientation usually put or position relationship, be for only for ease of description the utility model and letter
Change description, rather than indicate or the hint device of indication or element must with specific orientation, with specific azimuth configuration and
Operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second ", " the 3rd " etc. are only used for area
Divide description, and it is not intended that indicating or hint relative importance.
Additionally, the term such as term " level ", " vertical " is not offered as requiring part abswolute level or pendency, but can be slightly
Low dip.As " level " only refers to for its direction relative " vertical " more level, it is not that the expression structure must be complete
Full level, but can be slightly tilted.
In description of the present utility model, in addition it is also necessary to which explanation, unless otherwise clearly defined and limited, term " sets
Put ", " installation ", should be interpreted broadly " being connected ", " connection ", for example, it may be fixedly connected, or be detachably connected,
Or be integrally connected；Can be mechanically connected, or electrically connect；Can be joined directly together, it is also possible to by intermediary
It is indirectly connected to, can is the connection of two element internals.For the ordinary skill in the art, can be managed with concrete condition
Solve concrete meaning of the above-mentioned term in the utility model.
Preferred embodiment of the present utility model is these are only, the utility model is not limited to, for this area
Technical staff for, the utility model can have various modifications and variations.All of the present utility model spirit and principle within,
Any modification, equivalent substitution and improvement that is made etc., should be included within protection domain of the present utility model.
Claims (10)
1. a kind of high pier pier top Cast-in-place concrete bracket precompressed charger, it is characterised in that including the first reaction frame, the second counter-force
Frame, the first jack and the second jack, first reaction frame and the second reaction frame are respectively arranged in the two of high pier pier top
Side, first reaction frame and second reaction frame are respectively arranged with the first counter-force portion and the second counter-force portion, the high Dun Dun
The both sides on top are respectively arranged with the first concrete bracket and the second concrete bracket, and the first counter-force portion stretches out the high pier pier top and is located at
Above the first concrete bracket, first jack is arranged between the first concrete bracket and the first counter-force portion, institute
State the second counter-force portion to stretch out the high pier pier top and be located above the second concrete bracket, second jack is arranged at described
Between second counter-force portion and the second concrete bracket.
2. high pier pier top Cast-in-place concrete bracket precompressed charger according to claim 1, it is characterised in that first concrete
The first distribution girder construction is provided with bracket, and the first distribution girder construction includes many first transverse distribution beams and Duo Gen first
Longitudinal distribution beam, many first transverse distribution beams are placed on the first concrete bracket, and many first longitudinal directions are divided
Join beam to be positioned on many first transverse distribution beams, first jack is arranged at many first longitudinal direction distribution beam
On；The second distribution girder construction is provided with the second concrete bracket, and the second distribution girder construction includes that many second are laterally divided
Join beam and Duo Gen second longitudinal direction distribution beam, many second transverse distribution beams are placed on the second concrete bracket, many
The second longitudinal direction distribution beam is positioned on many second transverse distribution beams, and second jack is arranged at described in many
In second longitudinal direction distribution beam.
3. high pier pier top Cast-in-place concrete bracket precompressed charger according to claim 2, it is characterised in that the described 1000th
Jin top and second jack are hydraulic jack.
4. high pier pier top Cast-in-place concrete bracket precompressed charger according to claim 2, it is characterised in that the described 1000th
Jin top is located at the point midway of many first longitudinal direction distribution beam, and second jack is located at many second longitudinal directions
At the point midway of distribution beam.
5. high pier pier top Cast-in-place concrete bracket precompressed charger according to claim 1, it is characterised in that described first is anti-
Power frame and second reaction frame are all to be welded the truss structure for being formed by many girder steels.
6. high pier pier top Cast-in-place concrete bracket precompressed charger according to claim 5, it is characterised in that many steel
Beam is I-steel.
7. high pier pier top Cast-in-place concrete bracket precompressed charger according to claim 5, it is characterised in that the truss knot
Structure includes multiple triangular frame structure, multiple triangular frame structure interval settings.
8. high pier pier top Cast-in-place concrete bracket precompressed charger according to claim 1, it is characterised in that described first is anti-
Two first mounting rails are provided with power frame, and two first mounting rails push down first reaction frame, the high pier pier top
On be provided with many first anchor ribs, many first anchor ribs are all vertically arranged and bottom is embedded in the high pier pier top in advance,
Top through first mounting rail and is connected with the first nut, and multiple first nuts push down the upper of first mounting rail
Surface；Two second mounting rails are provided with second reaction frame, and two second mounting rails push down second counter-force
Frame, is provided with many second anchor ribs in the high pier pier top, many second anchor ribs are all vertically arranged and bottom is pre-buried
In the high pier pier top, top through second mounting rail and is connected with the second nut, and multiple second nuts push down institute
State the upper surface of the second mounting rail.
9. high pier pier top Cast-in-place concrete bracket precompressed charger according to claim 8, it is characterised in that many described
Described in one anchor rib and Duo Gen, the second anchor rib is fining twisted steel, two first mounting rails and two described second peace
Dress beam is I-steel.
10. high pier pier top Cast-in-place concrete bracket precompressed charger according to claim 1, it is characterised in that also include many
Individual first supporting leveling block and multiple second supporting leveling blocks, it is anti-that multiple first supporting leveling blocks may be contained within described first
Between power frame and the high pier pier top, multiple second supporting leveling blocks may be contained within second reaction frame with the high pier
Between pier top.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620863756.3U CN205999794U (en) | 2016-08-10 | 2016-08-10 | High pier pier top Cast-in-place concrete bracket precompressed charger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620863756.3U CN205999794U (en) | 2016-08-10 | 2016-08-10 | High pier pier top Cast-in-place concrete bracket precompressed charger |
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|---|---|
| CN205999794U true CN205999794U (en) | 2017-03-08 |
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ID=58198473
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087765A (en) * | 2016-08-10 | 2016-11-09 | 中交公局海威工程建设有限公司 | High pier pier top Cast-in-place concrete bracket precompressed charger |
| CN110184925A (en) * | 2019-05-09 | 2019-08-30 | 中交一公局海威工程建设有限公司 | End bay pre-pressing bracket device and end bay pre-pressing bracket system |
-
2016
- 2016-08-10 CN CN201620863756.3U patent/CN205999794U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106087765A (en) * | 2016-08-10 | 2016-11-09 | 中交公局海威工程建设有限公司 | High pier pier top Cast-in-place concrete bracket precompressed charger |
| CN110184925A (en) * | 2019-05-09 | 2019-08-30 | 中交一公局海威工程建设有限公司 | End bay pre-pressing bracket device and end bay pre-pressing bracket system |
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