CN203382404U - Crane and guardrail - Google Patents

Crane and guardrail Download PDF

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Publication number
CN203382404U
CN203382404U CN201320408475.5U CN201320408475U CN203382404U CN 203382404 U CN203382404 U CN 203382404U CN 201320408475 U CN201320408475 U CN 201320408475U CN 203382404 U CN203382404 U CN 203382404U
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CN
China
Prior art keywords
guard rail
rail body
bearing
guardrail
job platform
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN201320408475.5U
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Chinese (zh)
Inventor
单增海
郑洪权
孙九字
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Xuzhou Heavy Machinery Co Ltd
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Xuzhou Heavy Machinery Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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Priority to CN201320408475.5U priority Critical patent/CN203382404U/en
Application granted granted Critical
Publication of CN203382404U publication Critical patent/CN203382404U/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Abstract

The utility model discloses a guardrail, which comprises a support, a guardrail body and a locking device, wherein the support is fixedly arranged together with an operating platform; the guardrail body is hinged to the support; the locking device is used for locking the guardrail body at an open position. The guardrail can be overturned, and the guardrail body of the guardrail can be overturned onto the operating platform to be attached with the operating platform in a non-working state, so that the height of the whole vehicle can be prevented from being occupied by the guardrail in the non-working state of the guardrail, and can be effectively reduced; in addition, the limitation of the height of the whole vehicle to the height of the guardrail body is eliminated, and the height of the guardrail body of the overturning type guardrail can be increased, so that a better protective effect is achieved; moreover, the guardrail is attached to the working platform in the non-working state, so that the whole vehicle is more compact and reasonable in structure. The utility model also discloses a crane with the guardrail.

Description

A kind of hoisting crane and guard rail
Technical field
The utility model relates to the weight-lifting equipment technical field, more particularly, relates to a kind of hoisting crane and guard rail thereof.
Background technology
Guard rail is large-scale and the important protecting component ultra-large type wheel crane, on hoisting crane, every height is not less than all reasonable settings of 2 meters, and the auxiliary facility that enters setting, as the passage of eminence is walked on stage, half space, the belly board that turns to use and high-altitude working platform etc. all should arrange guard rail and be protected.
Traditional guard rail is to fix vertically to be arranged on hoisting crane, comprise guard rail body and the installation portion that is arranged at guard rail body lower end, installation portion is for being fixedly connected with the workplatform on hoisting crane, guardrail occupies bodywork height greatly, the height of whole guard rail and position are just determined when hoisting crane dispatches from the factory, along with wheel crane to large-scale and superhuge future development, the car load height of hoisting crane is increasing, yet the car load height of national Specification hoisting crane must not be higher than 4 meters, therefore in the situation that constantly increase of bodywork height, guarantee that the car load height can only take to reduce the measure of guard rail height below 4 meters.
But there is very large potential safety hazard in lower guard rail, easily causes personnel rout up guardrail and cause danger, so the guard rail of traditional form can not meet the protection of wheel crane and the demand of control car load height.
The utility model content
In view of this, the purpose of this utility model is to provide a kind of guard rail, with the height of guaranteeing guard rail under the impregnable prerequisite of car load height, can meet protection requirements, reduces potential safety hazard, guarantees the personal safety of the operating personal on job platform;
Another purpose of the present utility model is to provide a kind of hoisting crane with above-mentioned guard rail.
For achieving the above object, the utility model provides following technical scheme:
A kind of guard rail, be installed on the job platform of hoisting crane, and described guard rail comprises:
Be used for and the hard-wired bearing of described job platform;
Be articulated in the guard rail body on described bearing;
For described guard rail body being locked to the latching device of open position.
Preferably, in above-mentioned guard rail, at least one side of described bearing also is provided with for limiting the positioning plate of described guard rail body open and close angle, one end of described positioning plate is articulated on described bearing, and offer position-limited trough on described positioning plate, be fixedly installed the position limiting slide block be arranged in described position-limited trough on described guard rail body.
Preferably, in above-mentioned guard rail, a side that is provided with position limiting slide block on described guard rail body also is provided with positioning boss, and described position limiting slide block is fixedly installed on described positioning boss, is provided with the first knock hole on described positioning boss; Described latching device is to be arranged on described positioning plate and the first spring locating dowel pin corresponding with described the first knock hole when described guard rail body rotates to open position.
Preferably, in above-mentioned guard rail, also be provided with the second knock hole on described positioning boss, also be provided with the second spring locating dowel pin corresponding with described the second knock hole when described guard rail body rotates to make position on described positioning plate.
Preferably, in above-mentioned guard rail, described guard rail body is vertical with the plane at described bearing place when open position, when make position and the plane parallel at described bearing place.
Preferably, in above-mentioned guard rail, the both sides of described bearing respectively are provided with an installation portion, described installation portion specifically comprises a base plate and two vertical with described base plate and be oppositely arranged side plates, described base plate and described side plate form hinged groove, the railing bottom of described guard rail body both sides is provided with the hinged ear that can embed described hinged groove inside, and described guard rail body is hinged by the bearing pin and the described bearing that are arranged in described hinged groove and described hinged ear.
Preferably, in above-mentioned guard rail, also comprise between the installation portion that is arranged at described bearing both sides for preventing the skirting board of instrument landing.
Preferably, in above-mentioned guard rail, also comprise and being arranged between described bearing and described guard rail body, for the cushion rubber of damping vibration when described guard rail body rotates to make position.
Preferably, in above-mentioned guard rail, described cushion rubber is rubber buffer.
From above-mentioned technical scheme, can find out, the guard rail that the utility model provides is tiltable protective rail, because bearing is fixedly installed on job platform, and the guard rail body is articulated on bearing, therefore this guard rail can rotate to workplatform and with workplatform and realize laminating under off working state, do not affect the car load height, the guard rail body can be turn to open position and by latching device, its locking is got final product when the needs guard rail plays a role.
During due to existing guard rail work and off working state, be all vertically to be fixedly mounted on the job platform of hoisting crane, thereby itself has just occupied certain bodywork height, and that the guard rail that the utility model provides has been realized is turning, and when off working state, the guard rail body of this guard rail can turn on job platform and with job platform and fit, thereby it does not occupy the height of car load under non-operating condition, this just can effectively reduce the car load height; Simultaneously the height of guard rail body just is not subject to the restriction of car load height yet, by the setting of overturn type guardrail, can make height design larger of guard rail body, thereby have more protection effect; Simultaneously this kind of guard rail due to when the off working state and job platform fit, this structure that just makes car load is compact and reasonable more.
The utility model also provides a kind of hoisting crane, on the job platform of described hoisting crane, is provided with guard rail, and described guard rail is the as above described guard rail of any one.
Because guard rail has above-mentioned technique effect, therefore comprise that the hoisting crane of this guard rail also has above-mentioned technique effect, this place repeats no more.
The accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, below will the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Structural representation in the guard rail opening procedure that Fig. 1 provides for the utility model embodiment;
The partial enlarged drawing that Fig. 2 is A in Fig. 1;
The exploded perspective view of the guard rail that Fig. 3 provides for the utility model embodiment;
The structural representation when guard rail that Fig. 4 provides for the utility model embodiment is in an open position;
The partial enlarged drawing that Fig. 5 is B in Fig. 4;
The structural representation when guard rail that Fig. 6 provides for the utility model embodiment is in the close position;
The partial enlarged drawing that Fig. 7 is C in Fig. 6.
Wherein, 100 is the guard rail body, and 101 is hinged ear, 200 is bearing, and 201 is hinged groove, and 202 is skirting board, 300 is job platform, and 401 is the first spring locating dowel pin, and 402 is the second spring locating dowel pin, 500 is positioning plate, 501 is position-limited trough, and 502 is position limiting slide block, and 600 is positioning boss, 601 is the first knock hole, and 602 is the second knock hole.
The specific embodiment
Core of the present utility model is to provide a kind of guard rail, occupies the height of car load to avoid guard rail, thereby effectively improve the height of guard rail when effectively reducing the car load height, makes guard rail have more protection effect;
Another core of the present utility model is to provide a kind of hoisting crane with above-mentioned guard rail.
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the utility model part embodiment, rather than whole embodiment.Embodiment based in the utility model, those of ordinary skills are not making under the creative work prerequisite the every other embodiment obtained, and all belong to the scope of the utility model protection.
Refer to Fig. 1, Fig. 4 and Fig. 6, the structural representation (comprising job platform) in the guard rail opening procedure that Fig. 1 provides for the utility model embodiment; Structural representation (comprising job platform) when the guard rail that Fig. 4 provides for the utility model embodiment is in an open position; Structural representation (comprising job platform) when the guard rail that Fig. 6 provides for the utility model embodiment is in the close position.
The guard rail that the utility model embodiment provides, be installed on the job platform 300 of hoisting crane, and the job platform 300 of mentioning in the utility model embodiment is for to be not less than the job platform 300 of 2 meters apart from floor level, and job platform 300 includes but not limited to that passage walks on stage, half space, turn to the belly board of use and high-altitude working platform etc., this guard rail specifically comprises bearing 200, guard rail body 100 and latching device, wherein bearing 200 can be fixedly connected with job platform 300, the mode be fixedly connected with can be welding or dismantled and assembled connection, in the present embodiment, this is not done concrete restriction, guard rail body 100 is articulated on bearing 200, thereby realize that guard rail body 100 can be around the purpose of bearing 200 rotations, latching device is for reliable by guard rail body 100 lockings when guard rail body 100 rotates to open position, to avoid the unintentional rotation of guard rail body 100.The open position of mentioning in the present embodiment should be understood to the position that guard rail body 100 plays a role, and the position of (when the guard rail body is vertical with job platform) when generally shoulding be guard rail body 100 and angle between bearing 200 being 90 °.
In a specific embodiment of the present utility model, the side of bearing 200 is provided with the first locking hole, the side of guard rail body 100 is provided with when guard rail body 100 turns to open position the second just corresponding with the first locking hole locking hole, and latching device is specially the locking lever simultaneously be located in the first locking hole and the second locking hole.
Guard rail provided by the utility model is because it comprises the bearing 200 that can be fixedly connected with job platform 300 and is hinged on the guard rail body 100 on bearing 200, thereby this guard rail has been realized the turning of guard rail body 100 after being arranged on job platform 300, in the time of in working order, latching device is locked at by guard rail body 100 position that it can play a role, and avoids the unintentional rotation of guard rail body 100; When off working state, guard rail body 100 can turn on job platform 300 laminating realized with job platform 300 around bearing 200, thereby, under off working state, guard rail does not occupy the car load height, and this just can effectively reduce the car load height; Simultaneously the height of guard rail body 100 just is not subject to the restriction of car load height yet, by the setting of overturn type guardrail, can make height design larger of guard rail body 100, thereby make guard rail have more protection effect; Simultaneously this kind of guard rail due to when the off working state and workplatform fit, this structure that just makes car load is compact and reasonable more.
Also be provided with positioning plate 500 in the guard rail provided in another specific embodiment of the utility model, this positioning plate 500 can be provided with one and also can be provided with a plurality of, and positioning plate 500 is arranged at the side of bearing 200, be provided with two positioning plates 500 in guard rail shown in Fig. 1, Fig. 3, Fig. 4 and Fig. 6, the situation that two sides of bearing 200 are provided with positioning plate 500 of take in the present embodiment is specifically described as example.
One end of positioning plate 500 is articulated in the side of bearing 200, and offer position-limited trough 501 on the plate face of positioning plate 500, be fixedly installed the position limiting slide block 502 be located in position-limited trough 501 on two lateral rails of guard rail body 100, please refer to Fig. 2, Fig. 5 and Fig. 7, in the process of rotating around bearing 200 at guard rail body 100, positioning plate 500 is rotated around bearing 200 under the drive of position limiting slide block 502, and position limiting slide block 502 is also moved back and forth in position-limited trough 501, the position relationship of take in Fig. 2 describes as example, when guard rail body 100 rotates to make position gradually, positioning plate 500 is gradually to anticlockwise, and the position limiting slide block 502 be located in position-limited trough 501 moves to the bottom of position-limited trough 501 gradually, when position limiting slide block 502 moves to the bottom position of position-limited trough 501, (state shown in Fig. 7) guard rail body 100 can't be rotated again, end position when now guard rail body 100 turns to closure state, when guard rail body 100 rotates to open position gradually, positioning plate 500 is gradually to right rotation, and the position limiting slide block 502 be located in position-limited trough 501 moves to the upper end of position-limited trough 501 gradually, when position limiting slide block moves to the apical position of position-limited trough 501, (state shown in Fig. 5) guard rail body 100 can't be rotated again, end position when now guard rail body 100 turns to open mode.
As can be seen here, the linkage structure of the integral body that the guard rail body 100 of the guard rail provided in the present embodiment, positioning plate 500, position limiting slide block 502 etc. form, and match and realized the control to 100 unlatchings of guard rail body and closed angle with position-limited trough 501 on positioning plate 500 by position limiting slide block 502.
Preferably, guard rail body 100 when open position and the angle between bearing 200 be 90 °, certainly, because bearing 200 is fixedly installed on job platform 300, now guard rail body 100 is also 90 ° with the angle on job platform 300 surfaces, it will be appreciated by persons skilled in the art that can also guard rail body 100 open positions and bearing 200 between angle be set to other numerical value, such as 100 ° or 110 ° etc., in the present embodiment, this is not done concrete restriction; Guard rail body 100 when closing up and the angle between bearing 200 be 0 °, certainly, now the angle between guard rail body 100 and job platform 300 is also 0 °, can also guard rail body 100 make positions and bearing 200 between angle be set to other numerical value, such as 3 ° or 5 ° etc., in the present embodiment, this is not construed as limiting equally.What need to describe is, guard rail body 100 open positions are all to coordinate and realize by the position-limited trough 501 on position limiting slide block 502 and positioning plate 500 with angle and make position between bearing 200 with the angle between bearing 200, thereby, in order to make guard rail body 100 reach desirable open angle and closed angle, need to reasonably design position-limited trough 501.
In order to realize that guard rail body 100 can fit tightly with job platform 300 when turning to make position, preferably bearing 200 is fixedly installed on the side of job platform 300, as shown in Fig. 1, Fig. 4 and Fig. 6, and the extreme higher position of bearing 200 should be slightly lower than the surface of job platform 300.
In the guard rail provided at the utility model one specific embodiment, a side that is provided with position limiting slide block 502 on guard rail body 100 also is provided with positioning boss 600, certainly, if the both sides of guard rail body 100 are provided with position limiting slide block 502, also just be provided with positioning boss 600 in the both sides of guard rail body 100 so, wherein position limiting slide block 502 is fixedly installed on positioning boss 600, also is provided with the first knock hole 601 on positioning boss 600 simultaneously; The latching device provided in the present embodiment is the first spring locating dowel pin 401 be arranged on positioning plate 500, and this first spring locating dowel pin 401 is just corresponding with the first knock hole 601 when guard rail body 100 rotates to open position.
Rotate the handle on the first spring locating dowel pin 401, can realize that the first spring locating dowel pin 401 is inserted in the first knock hole 601, thereby realize the locking to guard rail body 100.
Be understandable that, guard rail body 100 can carry out locking to it when rotating to make position also can carry out locking to it, but when guard rail body 100 during in make position not to its carry out locking can cause guard rail body 100 when driving continue rock, this not only can cause noise pollution, also easily make the 100 material production fatigue damages of guard rail body, the guard rail for this reason provided in the present embodiment also is provided with the second knock hole 602 on positioning boss 600, also be provided with the second spring locating dowel pin 402 on positioning plate 500, and when guard rail body 100 rotates to make position, the second spring locating dowel pin 402 is just corresponding with the second knock hole 602, rotate the handle on the second spring locating dowel pin 402, can realize that the second spring locating dowel pin 402 is inserted in the second knock hole 602, thereby realize the locking to guard rail body 100.
Positioning boss 600 in above-mentioned two embodiment is specially the isosceles trapezoid positioning boss, as shown in Figure 2, and the position that two waists of positioning boss 600 are close to bottom surface is provided with the arc of guard rail body 100 railing adaptations and clamps section, and positioning boss 600 clamps section by arc and is fixedly connected with guard rail body 100.The position limiting slide block fixed orifice is arranged at the upper base medium position of positioning boss 600, and as shown in Figure 3, the first knock hole 601 is positioned at the upper end of position limiting slide block fixed orifice, and the second knock hole 602 is positioned at the lower end of position limiting slide block fixed orifice.
Need to describe, the nouns of locality such as the upper end of mentioning in the present embodiment, lower end are based on the figure shown in Fig. 3.
The both sides of the bearing 200 provided in the present embodiment respectively are provided with an installation portion, and each installation portion includes a base plate and two and the vertically disposed side plate of this bottom panel, and two side plates are oppositely arranged, base plate and two side plates form hinged groove 201, as shown in Figure 3, accordingly, the railing bottom of guard rail body 100 both sides is provided with the hinged ear 101 that can embed hinged groove 201 inside, and guard rail body 100 is realized hinged by the bearing pin and the bearing 200 that are arranged in hinged groove 201 and hinged ear 101.
The bearing of this kind of form can guarantee guard rail body 100 when make position and bearing 200 is 0 ° of angle, avoids the parts on bearing 200 when guard rail body 100 overturns to make position to produce and interfere guard rail body 100.
In order further to optimize the technical scheme in above-described embodiment, the guard rail in the present embodiment also comprises the skirting board 202 between the installation portion that is arranged on bearing 200 both sides.Because first cross bar and the distance between job platform 300 of guard rail body 100 are larger, thereby for fear of the personnel that work on job platform 300 or the instrument on job platform 300 of being placed on by the first cross bar of guard rail body 100 and the gap landing between job platform 300, be provided with skirting board 202 in the present embodiment between the installation portion of bearing 200 both sides, the height of this skirting board 202 is generally the 10cm left and right.
Guard rail body 100 is generally that vehicle is in travel condition when make position, now in the process of advancing along with vehicle, 100 meetings of guard rail body are continuous and bearing 200 or job platform 300 generation collisions because of jolting of road surface, this can be to guard rail body 100, bearing 200 and job platform 300 damage, also can produce larger noise simultaneously, guard rail in the present embodiment also comprises and being arranged between bearing 200 and guard rail body 100 for this reason, cushion rubber for damping vibration when guard rail body 100 rotates to make position, the material of cushion rubber can have multiple choices, as rubber pad or air cushion etc.
As can be seen here, the guard rail provided in the utility model embodiment can be realized opening and closing, this has just broken through the restriction of bodywork height to guardrail height, can effectively increase the height of guard rail when reducing bodywork height, increase the reliability of guard rail, and, when off working state, guard rail is closed to be fitted tightly with job platform, do not affect the car load height, the car load layout is more rationally compact.
The invention also discloses a kind of hoisting crane with above-mentioned guard rail, therefore have all technique effects of guard rail in above-described embodiment concurrently, this paper repeats no more.
In this specification sheets, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is and the difference of other embodiment that between each embodiment, identical similar part is mutually referring to getting final product.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the utility model.Multiple modification to these embodiment will be apparent for those skilled in the art, and General Principle as defined herein can be in the situation that do not break away from spirit or scope of the present utility model, realization in other embodiments.Therefore, the utility model will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.

Claims (10)

1. a guard rail, be installed on the job platform (300) of hoisting crane above, it is characterized in that, comprising:
Be used for and the hard-wired bearing of described job platform (300) (200);
Be articulated in the guard rail body (100) on described bearing (200);
For described guard rail body (100) being locked to the latching device of open position.
2. guard rail as claimed in claim 1, it is characterized in that, at least one side of described bearing (200) also is provided with for limiting the positioning plate (500) of described guard rail body (100) open and close angle, one end of described positioning plate (500) is articulated on described bearing (200), and offer position-limited trough (501) on described positioning plate (500), be fixedly installed the position limiting slide block (502) be arranged in described position-limited trough (501) on described guard rail body (100).
3. guard rail as claimed in claim 2, it is characterized in that, also be provided with positioning boss (600) on described guard rail body (100), and it is upper that described position limiting slide block (502) is fixedly installed on described positioning boss (600), is provided with the first knock hole (601) on described positioning boss (600); Described latching device is for being arranged on described positioning plate (500) and the first spring locating dowel pin (401) corresponding with described the first knock hole (601) when described guard rail body (100) rotates to open position.
4. guard rail as claimed in claim 3, it is characterized in that, also be provided with the second knock hole (602) on described positioning boss (600), also be provided with the second spring locating dowel pin (402) corresponding with described the second knock hole (602) when described guard rail body (100) rotates to make position on described positioning plate (500).
5. guard rail as claimed in claim 2, is characterized in that, described guard rail body (100) is vertical with the plane at described bearing (200) place when open position, when make position and the plane parallel at described bearing (200) place.
6. guard rail as claimed in claim 1, it is characterized in that, the both sides of described bearing (200) respectively are provided with an installation portion, described installation portion specifically comprises a base plate and two vertical with described base plate and be oppositely arranged side plates, described base plate and described side plate form hinged groove (201), the railing bottom of described guard rail body (100) both sides is provided with and can embeds the inner hinged ear (101) of described hinged groove (201), described guard rail body (100) is hinged by the bearing pin and the described bearing (200) that are arranged in described hinged groove (201) and described hinged ear (101).
7. guard rail as claimed in claim 6, is characterized in that, also comprises the skirting board (202) for preventing the instrument landing between the installation portion that is arranged at described bearing (200) both sides.
8. as the described guard rail of claim 1-7 any one, it is characterized in that, also comprise and being arranged between described bearing (200) and described guard rail body (100), for the cushion rubber of damping vibration when described guard rail body (100) rotates to make position.
9. guard rail as claimed in claim 8, is characterized in that, described cushion rubber is rubber buffer.
10. a hoisting crane, the job platform of described hoisting crane is provided with guard rail on (300), it is characterized in that, and described guard rail is as the described guard rail of claim 1-9 any one.
CN201320408475.5U 2013-07-09 2013-07-09 Crane and guardrail Expired - Lifetime CN203382404U (en)

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Application Number Priority Date Filing Date Title
CN201320408475.5U CN203382404U (en) 2013-07-09 2013-07-09 Crane and guardrail

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Application Number Priority Date Filing Date Title
CN201320408475.5U CN203382404U (en) 2013-07-09 2013-07-09 Crane and guardrail

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Publication Number Publication Date
CN203382404U true CN203382404U (en) 2014-01-08

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104261246A (en) * 2014-09-12 2015-01-07 上海市政建设有限公司 Hoisting tool of rectangular pipe-jacking section and use method of hoisting tool
CN105756396A (en) * 2016-04-29 2016-07-13 闫鹏飞 Parking guardrail
CN105971348A (en) * 2016-04-29 2016-09-28 闫鹏飞 Guardrail device for automobile parking
CN110242207A (en) * 2019-07-18 2019-09-17 贵州电网有限责任公司 A kind of portable aerial maintenance platform
CN113120780A (en) * 2021-04-29 2021-07-16 三一汽车起重机械有限公司 Rotary platform and working machine

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104261246A (en) * 2014-09-12 2015-01-07 上海市政建设有限公司 Hoisting tool of rectangular pipe-jacking section and use method of hoisting tool
CN105756396A (en) * 2016-04-29 2016-07-13 闫鹏飞 Parking guardrail
CN105971348A (en) * 2016-04-29 2016-09-28 闫鹏飞 Guardrail device for automobile parking
CN110242207A (en) * 2019-07-18 2019-09-17 贵州电网有限责任公司 A kind of portable aerial maintenance platform
CN113120780A (en) * 2021-04-29 2021-07-16 三一汽车起重机械有限公司 Rotary platform and working machine
CN113120780B (en) * 2021-04-29 2023-08-15 三一汽车起重机械有限公司 Rotary platform and working machine

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Correction item: Termination upon expiration of patent

Correct: Revocation of Patent Expiration and Termination

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Number: 30-01

Volume: 39

CU01 Correction of utility model