CN214783912U - Piling device for constructional engineering - Google Patents
Piling device for constructional engineering Download PDFInfo
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- CN214783912U CN214783912U CN202120394465.5U CN202120394465U CN214783912U CN 214783912 U CN214783912 U CN 214783912U CN 202120394465 U CN202120394465 U CN 202120394465U CN 214783912 U CN214783912 U CN 214783912U
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- 238000009434 installation Methods 0.000 claims description 17
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 claims 1
- 238000003466 welding Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004880 explosion Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The utility model provides a building engineering is with pile device belongs to pile device technical field. The lifting mechanism comprises a mounting assembly, a lifting assembly, a rotating assembly and an angle adjusting assembly, wherein a supporting frame in the mounting assembly is fixed on a base. A first motor in the lifting assembly is fixed on the support frame, one end of the screw rod is fixed on the first motor, the other end of the screw rod is installed on the support frame, and the lifting plate is driven by the screw rod. The mounting panel among the rotating assembly is fixed in the lifter plate, and the second motor is fixed in the mounting panel, and the rotary disk is fixed in the second motor, and the chuck is fixed in the rotary disk. The first supporting plate in the angle adjusting assembly is fixed on the base, the third motor is fixed on the first supporting plate, one side of the supporting frame is fixed on the third motor, the other side of the supporting frame is fixedly connected with the rotating shaft, the rotating shaft is rotated in the second supporting plate, and the second supporting plate is fixedly installed on the base. The device is provided with two different states in piling and running, and the equipment is ensured to run conveniently and safely.
Description
Technical Field
The utility model relates to a pile device technical field particularly, relates to a building engineering is with pile device.
Background
The pile driver consists of a pile hammer, a pile frame, accessory equipment and the like. The pile hammer is attached between two parallel vertical guide rods (commonly called gantry) at the front part of the pile frame and is hoisted by a hoisting hook. The pile frame is a steel structure tower frame, and a winch is arranged at the rear part of the pile frame and used for hoisting the pile and the pile hammer. The front of the pile frame is provided with a guide frame consisting of two guide rods for controlling the piling direction so that the pile can accurately penetrate into the stratum according to the designed direction. The basic technical parameters of the pile driver are the impact section weight, the impact kinetic energy and the impact frequency. The power source of the pile hammer according to the movement can be divided into a drop hammer, a steam hammer, a diesel hammer, a hydraulic hammer and the like. The existing pile drivers are mostly vertically designed, and are very inconvenient due to the high height in the moving operation of the device.
SUMMERY OF THE UTILITY MODEL
In order to compensate above not enough, the utility model provides a pile device for building engineering aims at improving present pile driver and is the vertical design mostly, because high very inconvenient in the device removes the operation. To a problem of (a).
The utility model discloses a realize like this: the utility model provides a pile device for building engineering, including installation component, lifting unit, rotating assembly and angle adjusting component, wherein, lifting unit sets up the lift that realizes rotating assembly on the installation component, and rotating assembly drives the pile body rotation, and angle adjusting component realizes lifting unit's angle modulation, the transport of the whole device of being convenient for.
The mounting assembly comprises a base and a supporting frame, and the supporting frame is fixedly mounted on one side of the base.
The lifting assembly comprises a first motor, a screw rod and a lifting plate, the first motor is fixedly mounted at the top end of the support frame, one end of the screw rod is fixedly mounted at an output shaft of the first motor, the other end of the screw rod is rotatably mounted at the bottom end of the support frame, and the lifting plate is mounted at the screw rod in a transmission manner.
The rotating assembly comprises an installation plate, a second motor, a rotating disk and a chuck, the installation plate is fixedly installed on one side of the lifting plate, the second motor is fixedly installed on the installation plate, the rotating disk is fixedly installed on an output shaft of the second motor, and the chuck is fixedly installed on the rotating disk.
The angle adjusting assembly comprises a first supporting plate, a third motor, a rotating shaft and a second supporting plate, the first supporting plate is fixedly installed on one side of the base, the third motor is fixedly installed on the first supporting plate, one side of the supporting frame is fixedly installed on an output shaft of the third motor, the other side of the supporting frame is fixedly connected with the rotating shaft, the rotating shaft is rotatably installed on the second supporting plate, and the second supporting plate is fixedly installed on the base.
The utility model discloses an in an embodiment, still include retaining member subassembly, retaining member subassembly includes install bin, first driving piece, fixed plate and locking piece, install bin fixed mounting in the base, first driving piece fixed mounting in the inside of install bin, fixed plate fixed mounting in first driving piece, locking piece fixed mounting in the fixed plate, the locking groove has been seted up on the support frame, the locking piece can peg graft in the locking groove.
In an embodiment of the present invention, the guide rods are fixed on both sides of the fixing plate, the fixing plate is inserted into the installation box, and the guide rods are far away from the limiting blocks fixed on the end portions of the fixing plate.
The utility model discloses an in an embodiment, still include supporting component, supporting component is provided with four groups, four groups the supporting component is established respectively the four corners position of base, supporting component includes second driving piece and supporting seat, second driving piece fixed mounting in the base, supporting seat fixed mounting in the second driving piece.
In an embodiment of the present invention, the base is kept away from one side of the supporting frame is fixed with a supporting block, a clamping groove is provided on the supporting block, and the supporting frame can be connected to the clamping groove.
The utility model discloses an in an embodiment, the spout has all been seted up to the both sides of lifter plate, sliding connection has linear guide in the spout, linear guide fixed mounting in the inside of support frame.
In an embodiment of the present invention, the mounting plate is kept away from one side of the second motor is fixed with a sliding seat, the sliding seat is connected with a circular guide rail in a sliding manner, the circular guide rail is fixedly installed in the rotating disc.
In an embodiment of the present invention, the supporting seat is a conical shape.
In an embodiment of the present invention, the chuck is a hydraulic chuck.
In an embodiment of the present invention, the bottom four corners of the base are fixed with self-locking universal wheels.
The utility model has the advantages that: the utility model discloses a pile driver for building engineering who obtains through above-mentioned design, during the use, when needing the pile, the third motor drives the support frame and upwards rotates, drives at the pivot and upwards rotates at the axial lead of support frame around the pivot, and is in vertical state until and base, and the lift subassembly is in vertical state this moment;
then the first motor drives the screw rod to rotate, the screw rod drives the lifting plate to move downwards, and the lifting plate drives the rotating assembly to move downwards. Meanwhile, the second motor drives the rotating disc to rotate downwards, so that the rotating disc drives the chuck to rotate, the pile body is clamped on the chuck, the pile body rotates automatically and moves downwards at the same time, and automatic piling is achieved;
after the pile is driven, the lifting plate moves upwards to an initial position, meanwhile, the pile body is loosened by the chuck, then the third motor rotates reversely, and further the support frame is driven to rotate downwards around the axis of the rotating shaft until the support frame and the base are in a horizontal state, and further the storage of the device is realized;
the device is provided with two different states in piling and running, and the equipment is ensured to run conveniently and safely.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
Fig. 1 is a schematic structural view of a piling state provided by an embodiment of the present invention;
fig. 2 is a schematic view of a storage state structure provided in an embodiment of the present invention;
fig. 3 is a schematic structural view of a lifting assembly according to an embodiment of the present invention;
fig. 4 is a schematic diagram of an explosion structure of a rotating assembly according to an embodiment of the present invention;
fig. 5 is a schematic diagram of an explosion structure of the rotating assembly according to the embodiment of the present invention;
fig. 6 is a schematic structural view of an angle adjustment assembly and a support assembly provided in an embodiment of the present invention;
fig. 7 is a schematic structural diagram of a locking assembly according to an embodiment of the present invention.
In the figure: 100-mounting the assembly; 110-a base; 111-a support block; 1111-card slot; 112-self-locking universal wheels; 120-a support frame; 121-a locking groove; 122-linear guide rail; 200-a lifting assembly; 210-a first motor; 220-a screw mandrel; 230-a lifting plate; 231-a chute; 300-a rotating assembly; 310-a mounting plate; 311-sliding seat; 320-a second motor; 330-rotating the disc; 331-circular guide rail; 340-a chuck; 400-an angle adjustment assembly; 410-a first support plate; 420-a third motor; 430-a rotating shaft; 440-a second support plate; 500-a locking assembly; 510-installation of a box; 520-a first driver; 530-a fixing plate; 531-guide bar; 5311-a limiting block; 540-a locking block; 600-a support assembly; 610-a second driver; 620-support seat.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
Examples
Referring to fig. 1, the present invention provides a technical solution: the utility model provides a pile driving device for building engineering, includes installation component 100, lifting unit 200, rotating assembly 300 and angle adjustment assembly 400, wherein, lifting unit 200 sets up the lift that realizes rotating assembly 300 on installation component 100, and rotating assembly 300 drives the pile body rotation, and angle adjustment assembly 400 realizes lifting unit 200's angle modulation, is convenient for the transport of whole device.
Referring to fig. 2, 3 and 6, the mounting assembly 100 includes a base 110 and a supporting bracket 120, and the supporting bracket 120 is fixedly mounted on one side of the base 110 by bolts. The lifting assembly 200 comprises a first motor 210, a screw rod 220 and a lifting plate 230, the first motor 210 is fixedly installed on one side of the top end of the support frame 120 through a bolt, one end of the screw rod 220 is fixedly installed on an output shaft of the first motor 210 through a coupler, the other end of the screw rod is rotatably installed at the bottom end of the support frame 120 through a bearing, the lifting plate 230 is installed on the screw rod 220 in a threaded transmission manner, and the lifting plate 230 is lifted. Specifically, one side of the base 110 far away from the support frame 120 is fixed with a support block 111 through a bolt, a clamping groove 1111 is formed in the support block 111, and the support frame 120 can be clamped in the clamping groove 1111 to realize the support of the support frame 120 in a horizontal state.
Referring to fig. 3 and 6, in an embodiment of the present invention, sliding grooves 231 are formed on both sides of the lifting plate 230, a linear guide 122 is slidably connected in the sliding grooves 231, and the linear guide 122 is fixedly mounted inside the supporting frame 120 through bolts to realize the limiting and guiding of the lifting plate 230 during movement. Specifically, the four corners of the bottom end of the base 110 are respectively fixed with a self-locking universal wheel 112, so that the device can be conveniently moved and fixed, and the mobility and flexibility of the device are improved.
Referring to fig. 4 and 5, the rotating assembly 300 includes a mounting plate 310, a second motor 320, a rotating disc 330 and a chuck 340, the mounting plate 310 is fixedly mounted on one side of the lifting plate 230 by welding, the second motor 320 is fixedly mounted on the mounting plate 310 by bolts, the rotating disc 330 is fixedly mounted on an output shaft of the second motor 320 by threads, the chuck 340 is fixedly mounted on the rotating disc 330 by bolts, and the chuck 340 is a hydraulic chuck. Preferably, a sliding seat 311 is fixed to a surface of the mounting plate 310, which is far from the second motor 320, by bolts, the sliding seat 311 is slidably connected to a circular guide rail 331, and the circular guide rail 331 is fixedly mounted to the rotating disc 330 by bolts, thereby reducing frictional resistance between the rotating disc 330 and the mounting plate 310.
Referring to fig. 6, the angle adjusting assembly 400 includes a first supporting plate 410, a third motor 420, a rotating shaft 430 and a second supporting plate 440, the first supporting plate 410 is fixedly installed at one side of the base 110 by bolts, the third motor 420 is fixedly installed at the first supporting plate 410 by bolts, one side of the supporting frame 120 is fixedly installed at an output shaft of the third motor 420, the other side of the supporting frame 120 is fixedly connected with the rotating shaft 430 by welding, the rotating shaft 430 is rotatably installed at the second supporting plate 440, and the second supporting plate 440 is fixedly installed at the base 110 by welding, so as to adjust the supporting frame 120 in a vertical and horizontal state.
Please refer to fig. 2 and fig. 7, in addition, in an embodiment of the present invention, the locking assembly 500 further includes a locking assembly 500, the locking assembly 500 includes an installation box 510, a first driving member 520, a fixing plate 530 and a locking block 540, the installation box 510 is fixedly installed on the base 110 through a bolt, the first driving member 520 is fixedly installed inside the installation box 510 through a bolt, the first driving member 520 is preferably a hydraulic cylinder, the fixing plate 530 is fixedly installed on a piston rod of the first driving member 520 through a thread, the locking block 540 is fixedly installed on the fixing plate 530 through a bolt, a locking groove 121 is formed on the supporting frame 120, and the locking block 540 can be inserted into the locking groove 121. When the installation structure is specifically arranged, guide rods 531 are fixed on two sides of the fixing plate 530 through bolts, the fixing plate 530 is inserted into the installation box 510, and a limiting block 5311 is fixed at one end of the guide rod 531, which is far away from the fixing plate 530, through welding.
Please refer to fig. 6, in addition, in an embodiment of the present invention, the support assembly 600 further includes four sets of support assemblies 600, the four sets of support assemblies 600 are respectively disposed at four corners of the base 110, the support assembly 600 includes a second driving member 610 and a support seat 620, the second driving member 610 is fixedly mounted on the base 110 through a bolt, the second driving member 610 is preferably a hydraulic cylinder, the support seat 620 is fixedly mounted at an end of a piston rod of the second driving member 610 through a thread, so as to support the device and improve the stability of the device during operation. Supporting seat 620 is the toper setting, and the area of contact between increase supporting seat 620 and the ground improves the stability when supporting.
Specifically, this pile driver for building engineering's theory of operation: when the device is used, the device is moved to a preset position, then the piston rod of the second driving piece 610 extends downwards, and the supporting seat 620 is pushed to move downwards until the supporting seat 620 is abutted against the ground, and the base 110 moves upwards under the reaction force of the ground to leave the ground, so that the support of the whole device is realized, and the working stability of the device is improved;
when the pile needs to be driven, the third motor 420 drives the supporting frame 120 to rotate upwards, and the supporting frame 120 is driven by the rotating shaft 430 to rotate upwards around the axis line of the rotating shaft 430 until the supporting frame is in a vertical state with the base 110, and at this time, the lifting assembly 200 is in a vertical state;
then, the piston rod of the first driving member 520 extends upwards to push the fixing plate 530 to move upwards, so that the locking block 540 on the fixing plate 530 moves upwards and then is inserted into the locking groove 121 at the bottom end of the supporting frame 120, thereby locking and fixing the supporting frame 120 and preventing the supporting frame 120 from shaking during operation;
then, the first motor 210 drives the screw rod 220 to rotate, the screw rod 220 drives the lifting plate 230 to move downwards, and the lifting plate 230 drives the rotating assembly 300 to move downwards. Meanwhile, the second motor 320 drives the rotating disc 330 to rotate downwards, the rotating disc 330 drives the chuck 340 to rotate, the pile body is clamped on the chuck 340, and the pile body rotates and moves downwards at the same time, so that automatic piling is realized;
after piling, the lifting plate 230 moves upwards to the initial position, the fixing plate 530 moves downwards, the locking block 540 leaves the support frame 120, meanwhile, the pile body is loosened by the chuck 340, then the third motor 420 rotates reversely, and then the support frame 120 is driven to rotate downwards around the axis of the rotating shaft 430 until the support frame 120 and the base 110 are in a horizontal state, and then the storage of the device is realized.
It should be noted that the specific model specifications of the first motor 210, the second motor 320, the third motor 420, the first driving element 520 and the second driving element 610 need to be determined by type selection according to the actual specification of the device, and the specific type selection calculation method adopts the prior art, so detailed description is omitted.
The power supply of the first motor 210, the second motor 320, the third motor 420, the first driving member 520 and the second driving member 610 and the principle thereof will be apparent to those skilled in the art and will not be described in detail herein.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A piling device for constructional engineering is characterized by comprising
The mounting assembly (100) comprises a base (110) and a supporting frame (120), wherein the supporting frame (120) is fixedly mounted on one side of the base (110);
the lifting assembly (200) comprises a first motor (210), a screw rod (220) and a lifting plate (230), the first motor (210) is fixedly installed at the top end of the supporting frame (120), one end of the screw rod (220) is fixedly installed at an output shaft of the first motor (210), the other end of the screw rod is rotatably installed at the bottom end of the supporting frame (120), and the lifting plate (230) is installed on the screw rod (220) in a transmission manner;
a rotating assembly (300), wherein the rotating assembly (300) comprises a mounting plate (310), a second motor (320), a rotating disc (330) and a chuck (340), the mounting plate (310) is fixedly mounted on one side of the lifting plate (230), the second motor (320) is fixedly mounted on the mounting plate (310), the rotating disc (330) is fixedly mounted on an output shaft of the second motor (320), and the chuck (340) is fixedly mounted on the rotating disc (330);
angle adjusting part (400), angle adjusting part (400) include first backup pad (410), third motor (420), pivot (430) and second backup pad (440), first backup pad (410) fixed mounting in one side of base (110), third motor (420) fixed mounting in first backup pad (410), one side fixed mounting of support frame (120) in the output shaft of third motor (420), the opposite side of support frame (120) with pivot (430) fixed connection, pivot (430) rotate install in second backup pad (440), second backup pad (440) fixed mounting in base (110).
2. The piling device for building engineering according to claim 1, further comprising a locking member assembly (500), wherein the locking member assembly (500) comprises an installation box (510), a first driving member (520), a fixing plate (530) and a locking block (540), the installation box (510) is fixedly installed on the base (110), the first driving member (520) is fixedly installed inside the installation box (510), the fixing plate (530) is fixedly installed on the first driving member (520), the locking block (540) is fixedly installed on the fixing plate (530), a locking groove (121) is formed in the supporting frame (120), and the locking block (540) can be inserted into the locking groove (121).
3. Piling device for building engineering according to claim 2, wherein a guide rod (531) is fixed on both sides of the fixing plate (530), the fixing plate (530) is inserted into the mounting box (510), and a limiting block (5311) is fixed on one end of the guide rod (531) far away from the fixing plate (530).
4. The piling device for building engineering according to claim 1, further comprising a support assembly (600), wherein the support assembly (600) is provided with four sets, the four sets of support assemblies (600) are respectively arranged at four corners of the base (110), the support assembly (600) comprises a second driving member (610) and a support seat (620), the second driving member (610) is fixedly arranged on the base (110), and the support seat (620) is fixedly arranged on the second driving member (610).
5. The piling device for the building engineering as recited in claim 1, wherein a supporting block (111) is fixed on one side of the base (110) far away from the supporting frame (120), a slot (1111) is opened on the supporting block (111), and the supporting frame (120) can be clamped in the slot (1111).
6. The piling device for the building engineering according to claim 1, wherein sliding grooves (231) are formed in both sides of the lifting plate (230), linear guide rails (122) are connected in the sliding grooves (231), and the linear guide rails (122) are fixedly installed in the supporting frame (120).
7. Piling device according to claim 1, wherein a sliding seat (311) is fixed on the side of said mounting plate (310) far from said second motor (320), a circular guide rail (331) is slidably connected to said sliding seat (311), and said circular guide rail (331) is fixedly mounted on said rotating disc (330).
8. Piling device according to claim 4, characterised in that said support (620) is conical.
9. A piling device for construction engineering according to claim 1, wherein said chuck (340) is a hydraulic chuck.
10. The piling device for building engineering as recited in claim 1, wherein the four corners of the bottom end of the base (110) are fixed with self-locking universal wheels (112).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120394465.5U CN214783912U (en) | 2021-02-22 | 2021-02-22 | Piling device for constructional engineering |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120394465.5U CN214783912U (en) | 2021-02-22 | 2021-02-22 | Piling device for constructional engineering |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214783912U true CN214783912U (en) | 2021-11-19 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120394465.5U Expired - Fee Related CN214783912U (en) | 2021-02-22 | 2021-02-22 | Piling device for constructional engineering |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214783912U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821919A (en) * | 2022-11-23 | 2023-03-21 | 安徽大学 | Piling device and method for slope support construction |
| CN120061341A (en) * | 2025-04-28 | 2025-05-30 | 辽宁城建集团有限公司 | A foundation pile fixing device for construction engineering |
-
2021
- 2021-02-22 CN CN202120394465.5U patent/CN214783912U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115821919A (en) * | 2022-11-23 | 2023-03-21 | 安徽大学 | Piling device and method for slope support construction |
| CN120061341A (en) * | 2025-04-28 | 2025-05-30 | 辽宁城建集团有限公司 | A foundation pile fixing device for construction engineering |
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| CF01 | Termination of patent right due to non-payment of annual fee |
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